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Sample records for balloon catheter dilation

  1. Balloon catheter dilation and nasolacrimal duct intubation for treatment of nasolacrimal duct obstruction after failed probing.

    PubMed

    Repka, Michael X; Chandler, Danielle L; Holmes, Jonathan M; Hoover, Darren L; Morse, Christine L; Schloff, Susan; Silbert, David I; Tien, D Robbins

    2009-05-01

    To compare the outcomes of balloon catheter dilation and nasolacrimal intubation as treatment for congenital nasolacrimal duct obstruction after failed probing in children younger than 4 years. We conducted a prospective, nonrandomized, multicenter study that enrolled 159 children aged 6 months to younger than 48 months who had a history of a single failed nasolacrimal duct probing and at least 1 of the following clinical signs of nasolacrimal duct obstruction: epiphora, mucous discharge, or increased tear lake. One hundred ninety-nine eyes underwent either balloon catheter nasolacrimal duct dilation or nasolacrimal duct intubation. Treatment success was defined as absence of epiphora, mucous discharge, or increased tear lake at the outcome visit 6 months after surgery. Treatment success was reported in 65 of 84 eyes (77%; 95% confidence interval, 65%-85%) in the balloon catheter dilation group compared with 72 of 88 eyes (84% after adjustment for intereye correlation; 74%-91%) in the nasolacrimal intubation group (risk ratio for success for intubation vs balloon dilation, 1.08; 0.95-1.22). Both balloon catheter dilation and nasolacrimal duct intubation alleviate the clinical signs of persistent nasolacrimal duct obstruction in a similar percentage of patients.

  2. [Combination of the ureteral dilation catheter and balloon catheter under the ureteroscope in the treatment of male urethral stricture].

    PubMed

    Zhou, Yi; Li, Gong-hui; Yan, Jia-jun; Shen, Cong; Tang, Gui-hang; Xu, Gang

    2016-01-01

    To investigate the clinical application of the ureteral dilation catheter combined with the balloon catheter under the ureteroscope in the treatment of urethral stricture in men. Under the ureteroscope, 45 male patients with urethral stricture received placement of a zebra guide wire through the strictured urethra into the bladder and then a ureteral dilation catheter along the guide wire, followed by dilation of the urethra from F8 initially to F14 and F16. Again, the ureteroscope was used to determine the length of the strictured urethra, its distance to the external urethral orifice, and whether it was normally located. An F24 balloon catheter and then a metal urethral calibrator was used for the dilation of the strictured urethra. After removal of the F18-F22 urethral catheter at 8 weeks, the urinary flow rate was measured immediately and again at 3 months. All the operations were successfully performed without serious complications. The maximum urinary flow rate was (13.3-29.9) ml/s (mean [17.7 ± 3.2] ml/s) at the removal of the catheter and (15.2-30.8) ml/s (mean [19.8 ± 3.9] ml/s) at 3 months after it. Smooth urination was found in all the patients during the 6-24 months follow-up. The application of the ureteral dilation catheter combined with, the balloon catheter under the ureteroscope is a good option for the treatment of male urethral stricture for its advantages of uncomplicatedness, safety, effectiveness, few complications, less pain, high success rate, and repeatable operation.

  3. Hygroscopic dilators vs balloon catheter ripening of the cervix for induction of labor in nulliparous women at term: Retrospective study

    PubMed Central

    Shindo, Ryosuke; Yonemoto, Naohiro; Yamamoto, Yuriko; Kasai, Junko; Kasai, Michi; Miyagi, Etsuko

    2017-01-01

    Objective To compare the efficacy and safety of hygroscopic dilators and balloon catheters for ripening of the cervix in induction of labor. Study design This retrospective, observational study used data from the Successive Pregnancy Birth Registry System of the Japan Society of Obstetrics and Gynecology from 2012 to 2014. Nulliparous women in whom labor was induced by mechanical methods of cervical ripening at term were enrolled. The eligible women were divided into dilator, balloon <40 mL, balloon ≧40 mL, and overlapping groups. Results The groups included 4645, 4100, 6615, and 1992 women, respectively. In the overlapping group, which included the women in whom delivery was most difficult, the vaginal delivery rate was lower and the intrauterine infection and neonatal mortality rates were higher than those in the dilator group. No difference in the vaginal delivery rate was observed among the dilator, balloon <40 mL, and balloon ≧40 mL groups (74.6%, 72.3%, and 73.8%, respectively; p>0.05). The vaginal instrumental delivery rate was higher in the two-balloon groups than in the dilator group. The volume of intrapartum hemorrhage was lowest in the dilator group. No significant difference in the frequencies of uterine rupture and intrauterine infection were observed among the dilator and two-balloon groups. With regard to neonatal outcomes, the frequency of a low Apgar score was statistically significantly lower in the dilator group than in the two-balloon groups. Moreover, the frequency of neonatal death tended to be lower in the dilator group than in the two-balloon groups. Conclusion With regard to cervical ripening for labor induction in nulliparous women at term, the vaginal delivery rate on using a dilator and on using a balloon seems to be equivalent. Concerning maternal complications and neonatal outcomes, cervical ripening with hygroscopic dilators in labor induction might be safer. PMID:29272277

  4. Endoscopic balloon catheter dilatation via retrograde or static technique is safe and effective for cricopharyngeal dysfunction

    PubMed Central

    Chandrasekhara, Vinay; Koh, Joyce; Lattimer, Lakshmi; Dunbar, Kerry B; Ravich, William J; Clarke, John O

    2017-01-01

    AIM To evaluate the safety and efficacy of upper esophageal sphincter (UES) dilatation for cricopharyngeal (CP) dysfunction. To determine if: (1) indication for dilatation; or (2) technique of dilatation correlated with symptom improvement. METHODS All balloon dilatations performed at our institution from over a 3-year period were retrospectively analyzed for demographics, indication and dilatation site. All dilatations involving the UES underwent further review to determine efficacy, complications, and factors that predict success. Dilatation technique was separated into static (stationary balloon distention) and retrograde (brusque pull-back of a fully distended balloon across the UES). RESULTS Four hundred and eighty-eight dilatations were reviewed. Thirty-one patients were identified who underwent UES dilatation. Median age was 63 years (range 27-81) and 55% of patients were male. Indications included dysphagia (28 patients), globus sensation with evidence of UES dysfunction (2 patients) and obstruction to echocardiography probe with cricopharyngeal (CP) bar (1 patient). There was evidence of concurrent oropharyngeal dysfunction in 16 patients (52%) and a small Zenker’s diverticula (≤ 2 cm) in 7 patients (23%). Dilator size ranged from 15 mm to 20 mm. Of the 31 patients, 11 had dilatation of other esophageal segments concurrently with UES dilatation and 20 had UES dilatation alone. Follow-up was available for 24 patients for a median of 2.5 mo (interquartile range 1-10 mo), of whom 19 reported symptomatic improvement (79%). For patients undergoing UES dilatation alone, follow-up was available for 15 patients, 12 of whom reported improvement (80%). Nineteen patients underwent retrograde dilatation (84% response) while 5 patients had static dilatation (60% response); however, there was no significant difference in symptom improvement between the techniques (P = 0.5). Successful symptom resolution was also not significantly affected by dilator size

  5. [A clinical observation of percutaneous balloon dilation and maintenance percutaneous transhepatic cholangial catheter drainage for treatment of 21 patients with benign biliary strictures and difficult endoscopy].

    PubMed

    Pan, Jie; Shi, Hai-feng; Li, Xiao-guang; Zhang, Xiao-bo; Liu, Wei; Jin, Zheng-yu; Hong, Tao; Yang, Ai-ming; Yang, Ning

    2012-06-01

    To investigate the value of percutaneous balloon dilation and percutaneous transhepatic cholangial drainage (PTCD) catheter maintenance in the treatment of benign biliary strictures. The clinical data of 21 patients with benign biliary strictures at Peking Union Medical College Hospital from June 2005 to June 2011 were retrospectively studied, in which 12 patients in severe stricture (stenosis > 70%) were treated with percutaneous balloon dilation and PTCD catheter placed across the stricture, while another 9 patients in median stricture (stenosis < 70%) were only treated with PTCD catheter maintenance. Of the 12 patients underwent balloon dilation and 6 - 12 months (median: 9 months) of PTCD catheter placement, 11 patients had the catheter successfully removed. In the follow-up of 6 - 24 months (median: 10 months), patency of bile duct was preserved in 9 of 11 patients, and recurrent stenosis was seen in 2 patients. A severe complication with biliary artery branch rupture and massive hemobilia was seen in 1 patient during balloon dilation. Of the 9 patients only treated with 1 - 12 months (median: 6 months) of PTCD catheter placement, 7 patients had the catheter successfully removed. In the follow-up of 5 - 18 months (median: 8 months), patency of bile duct was preserved in 5 of 7 patients, and recurrent stenosis was seen in 2 patients. No severe complication occurred. When endoscopy therapy is failed or the patient can't undergo endoscopy therapy, the percutaneous balloon dilation and PTCD catheter maintenance method is an effective alternative therapeutic approach in the treatment of benign biliary strictures. The moderate benign biliary stricture may be effectively treated only by the PTCD catheter maintenance method.

  6. Cross-sectional Analysis of the Relationship between Paranasal Sinus Balloon Catheter Dilations and Industry Payments among Otolaryngologists.

    PubMed

    Fujiwara, Rance J T; Shih, Allen F; Mehra, Saral

    2017-11-01

    Objective To characterize the relationship between industry payments and use of paranasal sinus balloon catheter dilations (BCDs) for chronic rhinosinusitis. Study Design Cross-sectional analysis of Medicare B Public Use Files and Open Payments data. Setting Two national databases, 2013 to 2014. Subjects and Methods Physicians with Medicare claims with Current Procedural Terminology codes 31295 to 31297 were identified and cross-referenced with industry payments. Multivariate linear regression controlling for age, race, sex, and comorbidity in a physician's Medicare population was performed to identify associations between use of BCDs and industry payments. The final analysis included 334 physicians performing 31,506 procedures, each of whom performed at least 11 balloon dilation procedures. Results Of 334 physicians, 280 (83.8%) received 4392 industry payments in total. Wide variation in payments to physicians was noted (range, $43.29-$111,685.10). The median payment for food and beverage was $19.26 and that for speaker or consulting fees was $409.45. One payment was associated with an additional 3.05 BCDs (confidence interval [95% CI],1.65-4.45; P < .001). One payment for food and beverages was associated with 3.81 additional BCDs (95% CI, 2.13-5.49; P < .001), and 1 payment for speaker or consulting fees was associated with 5.49 additional BCDs (95% CI, 0.32-10.63; P = .04). Conclusion Payments by manufacturers of BCD devices were associated with increased use of BCD for chronic rhinosinusitis. On separate analyses, the number of payments for food and beverages as well as that for speaker and consulting fees was associated with increased BCD use. This study was cross-sectional and cannot prove causality, and several factors likely exist for the uptrend in BCD use.

  7. Sinuplasty (Balloon Catheter Dilation)

    MedlinePlus

    ... be done without actual tissue removal. Although this technology initially was met with criticism, clinical studies have demonstrated that it is a safe tool in the management of chronic sinusitis. The American Rhinologic Society as well as the American Academy of Otolaryngology- ...

  8. Management of obstructed balloon catheters.

    PubMed Central

    Browning, G G; Barr, L; Horsburgh, A G

    1984-01-01

    Failure of a balloon catheter to deflate is not uncommon and prevents its removal. Methods of overcoming the problem include traction, bursting the balloon by overinflation, dissolving it with solvents, puncturing it percutaneously with a needle, or puncturing it with a wire stylet passed through the catheter. All except the last technique have major disadvantages and are of questionable safety. Transcatheter puncture of the balloon was used in 16 patients to remove obstructed balloon catheters without any technical difficulty, distress to the patient, or complication. The procedure is safe, simple, and does not require an anaesthetic. If necessary it could be performed safely by nursing or paramedical staff without the patient having to be admitted to hospital. It is the method of choice for the management of this problem. Images FIG 1 FIG 2 FIG 3 FIG 4 PMID:6428691

  9. Innovations in Balloon Catheter Technology in Rhinology.

    PubMed

    D'Anza, Brian; Sindwani, Raj; Woodard, Troy D

    2017-06-01

    Since being introduced more than 10 years ago, balloon catheter technology (BCT) has undergone several generations of innovations. From construction to utilization, there has been a myriad of advancements in balloon technology. The ergonomics of the balloon dilation systems have improved with a focus on limiting the extra assembly. "Hybrid" BCT procedures have shown promise in mucosal preservation, including treating isolated complex frontal disease. Multiple randomized clinical trials report improved long-term outcomes in stand-alone BCT, including in-office use. The ever-expanding technological innovations ensure BCT will be a key component in the armamentarium of the modern sinus surgeon. Copyright © 2017 Elsevier Inc. All rights reserved.

  10. Histopathology of balloon-dilation Eustachian tuboplasty.

    PubMed

    Kivekäs, Ilkka; Chao, Wei-Chieh; Faquin, William; Hollowell, Monica; Silvola, Juha; Rasooly, Tali; Poe, Dennis

    2015-02-01

    Surgical intervention of the Eustachian tube (ET) has become increasingly common in the past decade, and balloon dilation has shown promising results in recent studies. It is unclear how balloon dilation enhances ET function. Our aim was to evaluate histological changes in the ET's mucosal lumen comparing before balloon dilation, immediately after, and postoperatively. Case series. Thirteen patients with bilateral ET dysfunction were enrolled. Biopsies of the ET mucosa were obtained just before balloon dilation; immediately after; and in three cases, 5 to 12 weeks postoperatively. Specimens were retrospectively examined under light microscopy by two pathologists blinded to the clinical information and whether specimens were pre- or postballoon dilation. Preoperative biopsies were characterized by inflammatory changes within the epithelium and submucosal layer. Immediate response to balloon dilation was thinning of the mucosa, shearing of epithelium and crush injury to the submucosa, especially to lymphocytic infiltrates. Postoperative biopsies demonstrated healthy pseudocolumnar epithelium and replacement of lymphocytic infiltrate with a thinner layer of fibrous tissue. Reduction of inflammatory epithelial changes and submucosal inflammatory infiltrate appeared to be the principal result of balloon dilation. The balloon may shear or crush portions of inflamed epithelium but usually spared the basal layer, allowing for rapid healing. Additionally, it appeared to effectively crush lymphocytes and lymphocytic follicles that may become replaced with thinner fibrous scar. Histopathology of the ET undergoing balloon dilation demonstrated effects that could reduce the overall inflammatory burden and may contribute to clinical improvement in ET function. 4. © 2014 The American Laryngological, Rhinological and Otological Society, Inc.

  11. Laser welding of balloon catheters

    NASA Astrophysics Data System (ADS)

    Flanagan, Aidan J.

    2003-03-01

    The balloon catheter is one of the principal instruments of non-invasive vascular surgery. It is used most commonly for angioplasty (and in recent years for delivering stents) at a multitude of different sites in the body from small arteries in the heart to the bilary duct. It is composed of a polymer balloon that is attached to a polymer shaft at two points called the distal and proximal bonds. The diverse utility of balloon catheters means a large range of component sizes and materials are used during production; this leads to a complexity of bonding methods and technology. The proximal and distal bonds have been conventionally made using cyanoacrylate or UV curing glue, however with performance requirements of bond strength, flexibility, profile, and manufacturing costs these bonds are increasingly being made by welding using laser, RF, and Hot Jaw methods. This paper describes laser welding of distal and proximal balloon bonds and details beam delivery, bonding mechanisms, bond shaping, laser types, and wavelength choice.

  12. Indwelling esophageal balloon catheter for benign esophageal stenosis in infants and children.

    PubMed

    van der Zee, David; Hulsker, Caroline

    2014-04-01

    Balloon dilatation of benign esophageal strictures is an established mode of therapy in adults and children. There remains a group of patients with refractory stenosis despite dilatation at regular intervals. An indwelling balloon catheter may offer an alternative. This is a retrospective study of 19 children who underwent esophagoscopy between 2004 and 2012 with placement of an indwelling balloon catheter for refractory esophageal stenosis. Total number of endoscopies, number of endoscopies with indwelling balloon catheter, as well as complications, reoperations, and mortality due to use of the balloon catheter were studied. Patient age ranged from 4 weeks to 15 years. The indwelling balloon catheter was used to treat refractory stenosis after corrective surgery of long gap esophageal atresia (n = 5), esophageal atresia with distal fistula (n = 2), refractory esophageal stenosis due to caustic esophageal burns (n = 7), reflux (n = 2), and stenosis of unknown cause (n = 3). With the indwelling balloon catheter in place, the mean number of endoscopies equalled four. Complications were restenosis after a symptom-free period for which a new indwelling balloon catheter was necessary (n = 3). Two others needed two to five additional dilations: balloon leakage requiring replacement (n = 7 in 5 patients), sputum retention (n = 1), and dislodgement (n = 5 in 4 patients). More importantly, there was no mortality or the need for any patient to undergo a surgical resection. The indwelling balloon catheter is safe to use and can be used by parents at home. More importantly it obviates the need for rethoracotomy/-scopy or esophageal replacement.

  13. Balloon dilatation of benign and malignant esophageal strictures. Blind retrograde balloon dilatation.

    PubMed

    Graham, D Y; Smith, J L

    1985-06-01

    Balloon esophageal dilatation offers many theoretical advantages (safety, speed, and patient comfort) over dilatation with mercury-filled bougies or with the Eder-Puestow system. The authors used balloon dilators in 22 patients with dysphagia secondary to benign or malignant strictures. Dilatation was performed with fluoroscopic guidance, blindly, or by a combination of these techniques. For "blind" stricture dilatation, an Eder-Puestow spring-tipped guide wire is placed into the stomach using a fiberoptic endoscope. The distance from the incisor teeth to the stricture is measured, and the balloon shaft is marked to indicate when the middle of the balloon is within the stricture. Dilatation is then performed using the antegrade or, the preferred, retrograde technique. Finally, the dilated stricture is calibrated by pulling an inflated balloon through the previously strictured area without difficulty. An attempt was made to achieve an esophageal diameter of 15 mm at the initial dilatation episode, and patient discomfort was used as a guide as to the final diameter. The balloon dilatation technique was highly successful, and a stricture diameter of 15 mm (45-47 French) was achieved at the initial dilatation in most instances. Malignant strictures were easily dilated. Balloon dilatation is convenient, effective, quick, and potentially safer than the previous Eder-Puestow or mercury-filled bougie techniques.

  14. [Pressure-volume recording of PTCA catheters with balloons of lower and higher compliance].

    PubMed

    Werner, C; Bloss, P; Kiessling, D; Patzschke, H; Unverdorben, M; Vallbracht, C

    1999-11-01

    In this report, the results of complementary studies of pressure-volume (p-V) measurements on balloon catheters with balloons of low (LC) and high compliance (HC) used for percutaneous transluminal coronary angioplasty are discussed. The measurements were performed with balloons unconfined in air (free dilatation) and also confined in different shells. In the case of rigid shells, a surprisingly high self-expansion of the catheters was found. Although this self-expansion does not contribute to the radial dilatation, it cannot be neglected, but must be taken into account when the success of balloon dilatation is determined on the basis of measured p-V curves. The investigations performed using wrapped shells clearly show the different dilatation properties of LC and HC balloons. The results provide important information on the feasibility of controlled balloon dilatation on the basis of p-V measurements performed on-line during PTCA.

  15. 21 CFR 870.1350 - Catheter balloon repair kit.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Catheter balloon repair kit. 870.1350 Section 870... repair kit. (a) Identification. A catheter balloon repair kit is a device used to repair or replace the balloon of a balloon catheter. The kit contains the materials, such as glue and balloons, necessary to...

  16. 21 CFR 870.1350 - Catheter balloon repair kit.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Catheter balloon repair kit. 870.1350 Section 870... repair kit. (a) Identification. A catheter balloon repair kit is a device used to repair or replace the balloon of a balloon catheter. The kit contains the materials, such as glue and balloons, necessary to...

  17. 21 CFR 870.1350 - Catheter balloon repair kit.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Catheter balloon repair kit. 870.1350 Section 870... repair kit. (a) Identification. A catheter balloon repair kit is a device used to repair or replace the balloon of a balloon catheter. The kit contains the materials, such as glue and balloons, necessary to...

  18. Snare-assisted anterograde balloon mitral and aortic valvotomy using Inoue balloon catheter.

    PubMed

    Krishnan, Mangalath N; Syamkumar, M D; Sajeev, C G; Venugopal, K; Johnson, Francis; Vinaykumar, D; Velayudhan, C C; Jayakumar, T G

    2007-01-02

    We performed concurrent antegrade mitral and aortic valvotomy using Inoue dilatation catheter in 3 cases of combined rheumatic mitral and aortic stenosis. Following mitral valvotomy by standard procedure, aortic valve was crossed with the help of a floatation catheter. Stiff long length guide wire was fixed in descending aorta using a snare. Inoue catheter was threaded over the wire across the aortic valve and aortic valvotomy completed. Mitral valve area increased from mean 1 cm2 to 2 cm2; aortic gradient dropped from mean of 97 mm to 36 mm. Concurrent anterograde balloon mitral and aortic valvotomy may be effective and safe.

  19. Transthoracic ultrasound guided balloon dilation of cor triatriatum dexter in 2 Rottweiler puppies.

    PubMed

    Birettoni, F; Caivano, D; Bufalari, A; Giorgi, M E; Miglio, A; Paradies, P; Porciello, F

    2016-12-01

    Balloon dilation was performed in two Rottweiler puppies with cor triatriatum dexter and clinical signs of ascites using transthoracic echocardiographic guidance. The dogs were positioned on a standard echocardiography table in right lateral recumbency, and guide wires and balloon catheters were imaged by echocardiographic views optimized to allow visualization of the defect. The procedures were performed successfully without complications and clinical signs were resolved completely in both cases. Guide wires and balloon catheters appeared hyperechoic on transthoracic echocardiography image and could be clearly monitored and guided in real-time. These two cases demonstrate that it is possible to perform balloon catheter dilation of cor triatriatum dexter under transthoracic guidance alone. Copyright © 2016 Elsevier B.V. All rights reserved.

  20. Use of monorail PTCA balloon catheter for local drug delivery.

    PubMed

    Trehan, Vijay; Nair, Girish M; Gupta, Mohit D

    2007-01-01

    We report the use of monorail coronary balloon as an infusion catheter to give bailout abciximab selectively into the site of stent thrombosis as an adjunct to plain old balloon angioplasty (POBA) in a patient of subacute stent thrombosis of the left anterior descending coronary artery. The balloon component (polyamide material) of the monorail balloon catheter was shaved off the catheter so that abciximab injected through the balloon port of the catheter exited out the shaft of the balloon catheter at the site from where the balloon material was shaved off. We believe that selective infusion with abciximab along with POBA established antegrade flow and relieved the patient's ischemia. In the absence of essential hardware to give intracoronary drugs in an emergency situation, one may employ our technique of infusion through a monorail balloon catheter after shaving the balloon component from the catheter.

  1. Balloon dilation of the cartilaginous eustachian tube.

    PubMed

    Poe, Dennis S; Silvola, Juha; Pyykkö, Ilmari

    2011-04-01

    (1) To translate techniques developed in a previous cadaver study of balloon dilation of the cartilaginous eustachian tube (ET) into clinical treatment for refractory dilatory dysfunction and (2) to study the safety/efficacy of the technique in a pilot clinical trial. Prospective with subjects as their own historical controls since June 2009. Regional academic center. Eleven consecutive adult patients with longstanding otitis media with effusion (OME) who were unable to autoinsufflate their ET by Valsalva, swallow, or yawn and who had previous tympanostomies (average, 4.7). At the time of intervention, 5 of 11 had a tube; 2 of 11 had a tympanic membrane (TM) perforation. Four of 11 had intact TMs, 2 with OME and tympanogram type B and 2 with TM retraction and tympanogram types B and C. Balloon dilation of the cartilaginous ET was performed with sinus dilation instruments via transnasal endoscopic approach under general anesthesia in a day surgery setting. Inflation was to a maximum of 12 atm for 1 minute. ability to Valsalva, rating of ET mucosal inflammation, tympanogram, and otomicroscopy findings. All cases successfully dilated. Eleven of 11 could self-insufflate by Valsalva (P < .001); tympanograms were A (4/11), C (1/11), or open (6/11). All atelectases resolved. Procedures were well tolerated, without pain or complications related to dilation. Dilation of the cartilaginous ET appeared to be beneficial and without significant adverse effects in the treatment of ET dilatory dysfunction. Larger controlled trials with long-term results are now justified and needed.

  2. Endoscopic minor papilla balloon dilation for the treatment of symptomatic pancreas divisum.

    PubMed

    Yamamoto, Natsuyo; Isayama, Hiroyuki; Sasahira, Naoki; Tsujino, Takeshi; Nakai, Yousuke; Miyabayashi, Koji; Mizuno, Suguru; Kogure, Hirofumi; Sasaki, Takashi; Hirano, Kenji; Tada, Minoru; Koike, Kazuhiko

    2014-08-01

    A subpopulation of patients with pancreas divisum experience symptomatic events such as recurrent acute pancreatitis and chronic pancreatitis. Minor papilla sphincterotomy has been reported as being an effective treatment. The aim of this study was to evaluate the safety and efficacy of endoscopic balloon dilation for the minor papilla. Between 2000 and 2012, 16 patients were retrospectively included in this study. After endoscopic balloon dilation for the minor papilla was received, a pancreatic stent or a nasal pancreatic drainage catheter was placed for 1 week. If a stricture or obstruction was evident, it was treated with balloon dilation followed by long-term stent placement (1 year). When an outflow of pancreatic juice was disturbed by a pancreatic stone, endoscopic stone extraction was performed. Balloon dilation and stent placement were achieved and were successful in all the cases (16/16; 100%). Clinical improvement was achieved in 7 (84.7%) of the 9 patients with recurrent acute pancreatitis and in 6 (85.7%) of the 7 patients with chronic pancreatitis. Early complications were observed in 1 (6.3%) patient. Pancreatitis or bleeding related to balloon dilation was not observed. Endoscopic balloon dilation for the minor papilla is feasible for the management of symptomatic pancreas divisum.

  3. Videofluoroscopy-guided balloon dilatation for treatment of severe pharyngeal dysphagia.

    PubMed

    Yabunaka, Koichi; Konishi, Hideki; Nakagami, Gojiro; Matsuo, Jyunko; Noguchi, Atsushi; Sanada, Hiromi

    2015-01-01

    Balloon dilatation is a widely accepted technique in the management of esophageal and other types of gastrointestinal strictures, but it is rarely used for the treatment of pharyngeal dysphagia. Therefore, the aim of our prospective study was to evaluate the use of videofluoroscopy-guided balloon dilatation (VGBD) for the treatment of severe pharyngeal dysphagia. The study included 32 stroke patients who had been diagnosed with oral and/or pharyngeal dysphagia. All patients underwent dilatation of the esophageal inlet using a balloon catheter under videofluoroscopic guidance during one or more sessions. Following esophageal dilatation, manual feeding was provided twice weekly. VGBD was effective in 10 out of 32 patients; however, the remaining 22 patients were unable to attempt oral food consumption because aspiration was not completely resolved on videofluoroscopy. According to this case series, VGBD may provide treatment for patients with severe pharyngeal dysphagia, who have not consumed food orally for a long period of time.

  4. Balloon dilation of the eustachian tube for dilatory dysfunction: A randomized controlled trial.

    PubMed

    Poe, Dennis; Anand, Vijay; Dean, Marc; Roberts, William H; Stolovitzky, Jose Pablo; Hoffmann, Karen; Nachlas, Nathan E; Light, Joshua P; Widick, Mark H; Sugrue, John P; Elliott, C Layton; Rosenberg, Seth I; Guillory, Paul; Brown, Neil; Syms, Charles A; Hilton, Christopher W; McElveen, John T; Singh, Ameet; Weiss, Raymond L; Arriaga, Moises A; Leopold, John P

    2018-05-01

    To assess balloon dilation of the Eustachian tube with Eustachian tube balloon catheter in conjunction with medical management as treatment for Eustachian tube dilatory dysfunction. In this prospective, multicenter, randomized, controlled trial, we assigned, in a 2:1 ratio, patients age 22 years and older with Eustachian tube dilatory dysfunction refractory to medical therapy to undergo balloon dilation of the Eustachian tube with balloon catheter in conjunction with medical management or medical management alone. The primary endpoint was normalization of tympanogram at 6 weeks. Additional endpoints were normalization of Eustachian Tube Dysfunction Questionaire-7 symptom scores, positive Valsalva maneuver, mucosal inflammation, and safety. Primary efficacy results demonstrated superiority of balloon dilation of the Eustachian tube with balloon catheter + medical management compared to medical management alone. Tympanogram normalization at 6-week follow-up was observed in 51.8% (72/139) of investigational patients versus 13.9% (10/72) of controls (P < .0001). Tympanogram normalization in the treatment group was 62.2% after 24 weeks. Normalization of Eustachian Tube Dysfunction Questionaire-7 Symptom scores at 6-week follow-up was observed in 56.2% (77/137) of investigational patients versus 8.5% (6/71) controls (P < .001). The investigational group also demonstrated substantial improvement in both mucosal inflammation and Valsalva maneuver at 6-week follow-up compared to controls. No device- or procedure-related serious adverse events were reported for those who underwent balloon dilation of the Eustachian tube. This study demonstrated superiority of balloon dilation of the Eustachian tube with balloon catheter + medical management compared to medical management alone to treat Eustachian tube dilatory dysfunction in adults. 1b. Laryngoscope, 128:1200-1206, 2018. © 2017 The American Laryngological, Rhinological and Otological Society, Inc.

  5. [Testing methods for the characterization of catheter balloons and lumina].

    PubMed

    Werner, C; Rössler, K; Deckert, F

    1995-10-01

    The present paper reports on the characterization of catheter balloons and lumina on the basis of such known parameters as residual volume, compliance, burst pressure and flow rate, with the aim of developing standards, test methods and testing equipment as well as standards. These are becoming ever more important with the coming into force of the EC directive on medical products [7] and the law governing medical products in Germany [13], which requires manufacturers to specify the properties of their products. Our testing concept is based on a commercially available machine that subjects materials to alternating extension and compression forces over the long-term, to which we added a special hydraulic module. Using the multimedia technology we achieved a real time superimposition of the volume-diameter curve on the balloon. The function of the testing device and method is demonstrated on dilatation catheters. Our initial results reveal compatibility with the requirements of the 1% accuracy class. Use of this methodology for comparative testing of catheters and quality evaluation is recommended.

  6. False coronary dissection with the new Monorail angioplasty balloon catheter.

    PubMed

    Esplugas, E; Cequier, A R; Sabaté, X; Jara, F

    1990-01-01

    During percutaneous transluminal coronary angioplasty, the appearance of persistent staining in the vessel by contrast media suggests coronary dissection. We report seven patients in whom a false image of severe coronary dissection was observed during angioplasty performed with the new Monorail balloon catheter. This image emerges at the moment of balloon inflation, is distally located to the balloon, and disappears with balloon catheter deflation. No complications were associated with the appearance of this image.

  7. Minimally invasive per-catheter occlusion and dilation procedures for congenital cardiovascular abnormalities in dogs.

    PubMed

    Tobias, Anthony H; Stauthammer, Christopher D

    2010-07-01

    With ever-increasing sophistication of veterinary cardiology, minimally invasive per-catheter occlusion and dilation procedures for the treatment of various congenital cardiovascular abnormalities in dogs have become not only available, but mainstream. Much new information about minimally invasive per-catheter patent ductus arteriosus occlusion has been published and presented during the past few years. Consequently, patent ductus arteriosus occlusion is the primary focus of this article. Occlusion of other less common congenital cardiac defects is also briefly reviewed. Balloon dilation of pulmonic stenosis, as well as other congenital obstructive cardiovascular abnormalities is discussed in the latter part of the article.

  8. Application of Electrocautery Needle Knife Combined with Balloon Dilatation versus Balloon Dilatation in the Treatment of Tracheal Fibrotic Scar Stenosis.

    PubMed

    Bo, Liyan; Li, Congcong; Chen, Min; Mu, Deguang; Jin, Faguang

    Electrocautery needle knives can largely reduce scar and granulation tissue hyperplasia and play an important role in treating patients with benign stricture. The aim of this retrospective study was to evaluate the efficacy and safety of electrocautery needle knife combined with balloon dilatation versus balloon dilatation alone in the treatment of tracheal stenosis caused by tracheal intubation or tracheotomy. We retrospectively analysed the clinical data of 43 patients with tracheal stenosis caused by tracheotomy or tracheal intubation in our department from January 2013 to January 2016. Among these 43 patients, 23 had simple web-like stenosis and 20 had complex steno sis. All patients were treated under general anaesthesia, and the treatment methods were (1) balloon dilatation alone, (2) needle knife excision of fibrotic tissue combined with balloon dilatation, and (3) needle knife radial incision of fibrotic tissue combined with balloon dilatation. After treatment the symptoms, such as shortness of breath, were markedly improved immediately in all cases. The stenosis degree of patients who were treated with the elec-trocautery needle knife combined with balloon dilatation had better improvement compared with that of those treated with balloon dilatation treatment alone after 3 months (0.45 ± 0.04 vs. 0.67 ± 0.05, p < 0.01), and the proportion of restenosis occurrence that required further treatment was decreased at 6 months (46.9 vs. 81.8%), especially for the web-like stenosis patients, as most of their stenoses dilated with no obvious restenosis and achieved clinical cure. Electrocautery needle knife combined with balloon dilatation is an effective and safe treatment for tracheal fibrotic stenosis compared with balloon dilatation alone. © 2017 S. Karger AG, Basel.

  9. Retrieval of impacted broken balloon by balloon inflation in guiding catheter.

    PubMed

    Mehta, Vimal; Pandit, Bhagya Narayan; Yusuf, Jamal; Mukhopadhyay, Saibal; Trehan, Vijay; Tyagi, Sanjay

    2014-07-01

    Broken catheter fragment in a coronary artery during percutaneous coronary angioplasty is a rare complication. It can result in serious problems as a result of thrombus formation and embolization of broken fragment. We report an unusual complication of a broken balloon catheter during angioplasty, which was successfully retrieved by balloon inflation in guiding catheter technique.

  10. Thrombus aspiration catheter is a Dottering balloon.

    PubMed

    Sheshagiri Rao, D; Barik, Ramachandra; Prasad, Akula Siva

    2016-01-01

    Coronary angiogram in a young man with history of STEMI with delayed presentation revealed subtotal occlusion of left anterior descending artery (LAD) with large thrombotic filling defect distal to the critical lesion. PCI was preferred without delay because of ongoing chest pain. Several runs of thrombus aspiration failed to detect any visible thrombus. However, the immediate angiogram after thrombus aspiration showed complete distal embolization of the thrombus which could have been achieved by Dottering or balloon dilatation. In contrary to the general perception, does thrombus aspiration push more thrombus than it can aspirate? Copyright © 2016 Cardiological Society of India. Published by Elsevier B.V. All rights reserved.

  11. 21 CFR 870.1350 - Catheter balloon repair kit.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Catheter balloon repair kit. 870.1350 Section 870.1350 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1350 Catheter balloon...

  12. 21 CFR 870.1350 - Catheter balloon repair kit.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Catheter balloon repair kit. 870.1350 Section 870.1350 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1350 Catheter balloon...

  13. Clinical experience with the Monorail balloon catheter for coronary angioplasty.

    PubMed

    Finci, L; Meier, B; Roy, P; Steffenino, G; Rutishauser, W

    1988-01-01

    The Monorail balloon catheter is distinctly different from other current balloon catheters: the guidewire passes through the balloon itself, exits the catheter proximal to the balloon, and runs alongside its small shaft (3 French) through the guiding catheter. Monorail coronary angioplasty was attempted in 61 patients on 73 lesions with balloons from 2.0 to 3.7 mm. Angiographic success was obtained in 66 lesions (90%). For 15 lesions, balloon exchanges were needed. In three lesions, the Monorail balloon failed to cross the lesion, while a standard balloon succeeded; two lesions could not be crossed with any balloon. Vessel occlusion occurred in four patients: two had emergency surgery without infarct (one died suddenly 4 days later and one had a stroke 1 day later), one was recanalized with a standard balloon, and one had a myocardial infarct. Continuous infusion of urokinase was used until patient 3 in whom problems with the delivery system led to cardiocerebral air embolization (with complete recovery). No thrombotic complications were observed in the subsequent 58 patients with only a bolus of 10,000 U of heparin. The Monorail balloon facilitates contrast injections and balloon exchanges but appears more difficult to pass through tight lesions. Omission of the previously recommended infusion with a thrombolytic agent proved safe.

  14. Balloon dilation of congenital supravalvular pulmonic stenosis in a dog.

    PubMed

    Treseder, Julia R; Jung, SeungWoo

    2017-03-30

    Percutaneous balloon valvuloplasty is considered the standard of care for treatment of valvular pulmonic stenosis, a common congenital defect in dogs. Supravalvular pulmonic stenosis is a rare form of pulmonic stenosis in dogs and standard treatment has not been established. Although, there have been reports of successful treatment of supravalvular pulmonic stenosis with surgical and stenting techniques, there have been no reports of balloon dilation to treat dogs with this condition. Here, a case of supravalvular pulmonic stenosis diagnosed echocardiographically and angiographically in which a significant reduction in pressure gradient was achieved with balloon dilation alone is presented.

  15. A prosthesis for banding the main pulmonary artery, capable of serial dilatation by balloon angioplasty.

    PubMed

    Vince, D J; Culham, J A

    1989-03-01

    A prosthesis constructed with a fatigued steel helix encased in a silicone rubber shield was used to band the main pulmonary artery in 10 dogs. After a mean duration of 138 days the banded site was dilated with a 20 mm diameter angioplasty catheter. This dilatation produced a mean increase of 44.3% in the cross-sectional area. A further mean increase of 2.2% in the cross-sectional area was measured 137 days after the dilatation. In five uncomplicated experiments a second dilatation was performed with a 23 mm diameter angioplasty catheter after a mean interval of 140 days. The second dilatation produced a further 21% increase in the cross-sectional area. In the five experiments in which two dilatations were performed, there was a total increase in the mean cross-sectional area of 94% produced 273 days after banding. This prosthesis maintains banding of the main pulmonary artery and can be serially dilated by balloon angioplasty.

  16. Balloon dilatation of nasopharyngeal stenosis in a dog.

    PubMed

    Berent, Allyson C; Kinns, Jennifer; Weisse, Chick

    2006-08-01

    A dog was examined because of a 6-month history of upper airway stridor that began after postoperative regurgitation of gastric contents. Constant stridor was evident during inspiration and expiration, although it was worse during inspiration. The stridor was no longer evident when the dog's mouth was manually held open. Computed tomography, rhinoscopy, and fluoroscopy were used to confirm a diagnosis of nasopharyngeal stenosis. The dog was anesthetized, and balloon dilatation of the stenosis was performed. Prednisone was prescribed for 4 weeks after the procedure to decrease fibrous tissue formation. Although the dog was initially improved, signs recurred 3.5 weeks later, and balloon dilatation was repeated. This time, however, triamcinolone was injected into the area of stenosis at the end of the dilatation procedure. Two months later, although the dog did not have clinical signs of stridor, a third dilatation procedure was performed because mild stenosis was seen on follow-up computed tomographic images; again, triamcinolone was injected into the area of stenosis at the end of the dilatation procedure. Three and 6 months after the third dilatation procedure, the dog reportedly was clinically normal. Findings suggest that balloon dilatation may be an effective treatment for nasopharyngeal stenosis in dogs.

  17. The Accordion Sign in the Transplant Ureter: Ramifications During Balloon Dilation of Strictures

    SciTech Connect

    Kriegshauser, J. Scott, E-mail: skriegshauser@mayo.edu; Naidu, Sailen G.; Chang, Yu-Hui H.

    PurposeThis study was designed to demonstrate the accordion sign within the transplant ureter and evaluate its ramifications during balloon dilation of strictures.MethodsA retrospective electronic chart and imaging review included demographic characteristics, procedure reports, and complications of 28 renal transplant patients having ureteral strictures treated with percutaneous balloon dilation reported in our transplant nephrology database during an 8-year period. The accordion sign was deemed present or absent on the basis of an imaging review and was defined as present when a tortuous ureter became kinked and irregular when foreshortened after placement of a wire or a catheter. Procedure-related urine leaks weremore » categorized as occurring at the stricture if within 2 cm; otherwise, they were considered away from the stricture.ResultsThe accordion sign was associated with a significantly greater occurrence of leaks away from the stricture (P = 0.001) but not at the stricture (P = 0.34).ConclusionsThe accordion sign is an important consideration when performing balloon dilation procedures on transplant ureteral strictures, given the increased risk of leak away from the stricture. Its presence should prompt additional care during wire and catheter manipulations.« less

  18. Evaluation of a New Balloon Catheter for Difficult Calcified Lesions in Infrainguinal Arterial Disease: Outcome of a Multicenter Registry

    SciTech Connect

    Spaargaren, G. J.; Lee, M. J.; Reekers, J. A.

    2009-01-15

    The purpose of this study was to assess the technical performance and immediate procedure outcome of a new balloon catheter in the treatment of calcified lesions in infrainguinal arterial disease. Seventy-five patients with infrainguinal arterial disease were prospectively entered into the registry. The catheter (ReeKross Clearstream, Ireland) is a 5- to 6-Fr balloon catheter with a rigid shaft intended for enhanced pushability. Only technical procedural outcome was recorded. Treated calcified lesions (range: 5-30 cm), assessed angiographically, were located in the superficial femoral, popliteal, and crural arteries. In 67 patients the lesion was an occlusion. Guidewire passage occurred subintimally in 68more » patients. In 24 patients a standard balloon catheter was chosen as first treatment catheter: 5 failed to cross the lesion, 8 balloons ruptured, and in 11 patients there was an inadequate dilatation result. In only one of the five patients did subsequent use of the ReeKross catheter also fail in lesion crossing. The ReeKross was successful as secondary catheter in the other 23 cases. In 50 patients the ReeKross was used as primary catheter. In total the ReeKross crossed the lesions in 74 patients. After passage and dilatation with this catheter in 73 patients (1 failed true-lumen reentry), 19 had >30% residual lesions, of which 11 were not treated and 8 were successfully stented. No ReeKross balloons ruptured. We conclude that in the treatment of difficult calcified lesions in arterial stenotic or occlusive disease, the choice of a high-pushability angioplasty catheter, with more calcification-resistant balloon characteristics, like the ReeKross, warrants consideration.« less

  19. Balloon dilation of the cartilaginous portion of the eustachian tube: initial safety and feasibility analysis in a cadaver model.

    PubMed

    Poe, Dennis S; Hanna, Bassem Matta Nashed

    2011-01-01

    Balloon catheter dilation of diseased sinus ostia has recently demonstrated efficacy and safety in the treatment of chronic sinus disease with 2 years of follow-up. Similar to sinus surgery, initial studies of partial resection of inflamed mucosa from within the cartilaginous eustachian tube (ET) have demonstrated efficacy and safety in the treatment of medically refractory otitis media with effusion. Therefore, balloon dilation of the cartilaginous ET was investigated as a possible treatment modality for otitis media. A protocol for sinus balloon catheter dilation was evaluated in each of the cartilaginous ETs in 8 fresh human cadaver heads. Computed tomographic scans and detailed endoscopic inspections with video or photographic documentation were performed pre- and posttreatment, and gross anatomical dissections were done to analyze the effects of treatment and to look for evidence of undesired injury. Catheters successfully dilated all cartilaginous ETs without any significant injuries. There were no bony or cartilaginous fractures, and 3 specimens showed minor mucosal tears in the anterolateral or inferior walls. Volumetric measurements of the cartilaginous ET lumens showed a change from an average of 0.16 to 0.49 cm(3) (SD, 0.12), representing an average increase of 357% (range, 20-965%). Balloon catheter dilation of the nasopharyngeal orifice of the ET was shown to be feasible and without evidence of untoward injury. A significant increase in volume of the cartilaginous ET was achieved. A clinical study is now indicated to determine whether balloon dilation will demonstrate lasting benefits and safety in the treatment of otitis media. Copyright © 2011 Elsevier Inc. All rights reserved.

  20. Cryo-balloon catheter localization in fluoroscopic images

    NASA Astrophysics Data System (ADS)

    Kurzendorfer, Tanja; Brost, Alexander; Jakob, Carolin; Mewes, Philip W.; Bourier, Felix; Koch, Martin; Kurzidim, Klaus; Hornegger, Joachim; Strobel, Norbert

    2013-03-01

    Minimally invasive catheter ablation has become the preferred treatment option for atrial fibrillation. Although the standard ablation procedure involves ablation points set by radio-frequency catheters, cryo-balloon catheters have even been reported to be more advantageous in certain cases. As electro-anatomical mapping systems do not support cryo-balloon ablation procedures, X-ray guidance is needed. However, current methods to provide support for cryo-balloon catheters in fluoroscopically guided ablation procedures rely heavily on manual user interaction. To improve this, we propose a first method for automatic cryo-balloon catheter localization in fluoroscopic images based on a blob detection algorithm. Our method is evaluated on 24 clinical images from 17 patients. The method successfully detected the cryoballoon in 22 out of 24 images, yielding a success rate of 91.6 %. The successful localization achieved an accuracy of 1.00 mm +/- 0.44 mm. Even though our methods currently fails in 8.4 % of the images available, it still offers a significant improvement over manual methods. Furthermore, detecting a landmark point along the cryo-balloon catheter can be a very important step for additional post-processing operations.

  1. Balloon dilation of sinus ostia in the Department of Defense: Diagnoses, actual indications, and outcomes.

    PubMed

    Laury, Adrienne M; Bowe, Sarah N; Stramiello, Joshua; McMains, Kevin C

    2017-03-01

    To determine the primary diagnoses for which balloon catheter dilation (BCD) of sinus ostia is being employed in a profit-blind health care system, the Department of Defense. Retrospective chart review. From January 1, 2011 to December 31, 2013, 319 consecutive patient charts were reviewed for International Classification of Diseases, Ninth Edition (ICD-9) diagnoses, presence of chronic rhinosinusitis (CRS) defined by the European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS), preoperative Lund-Mackay scores, nasal endoscopy findings, sinuses dilated, postoperative outcomes, and complications. Of the 319 patients identified, 217 had sufficient documentation to be included. A CRS ICD-9 code was applied in 182 of 217 (83.9%) and recurrent acute rhinosinusitis in 12 of 217 (5.6%). Only 50.5% of CRS patient charts met criteria using EPOS guidelines. In contrast, 39.6% met the ICD-9 criteria for atypical facial pain. Patients with Lund-Mackay scores ≤ 4 were reviewed for number of sinuses dilated. Eighty-eight of 123 patients (71.5%) had sinuses dilated that were free from opacification/mucosal edema on preoperative imaging. Balloon dilation of sinus ostia has an expanding role in treating sinus disease. In the studied population, BCD is often utilized for alternate indications for which there is currently no evidence of efficacy. Future studies are needed to evaluate the efficacy of this technology in treating these alternate indications. 4. Laryngoscope, 127:544-549, 2017. © 2016 The American Laryngological, Rhinological and Otological Society, Inc.

  2. Balloon pulmonary valvotomy--not just a simple balloon dilatation.

    PubMed

    Mohanty, Subhendu; Pandit, Bhagya Narayan; Tyagi, Sanjay

    2014-01-01

    Balloon pulmonary valvotomy is the preferred mode of treatment in patients with isolated pulmonary valvar stenosis and has shown good long term results. It is generally considered a safe procedure with few complications. There have been however, case reports of potentially fatal acute severe pulmonary edema occurring after the procedure in some patients. The cause of this complication and its pathophysiology is still not clear. Its occurrence is also infrequent with less than 5 cases reported till now. We report a case of pulmonary valvar stenosis which developed acute severe refractory pulmonary edema immediately after balloon pulmonary valvotomy. Copyright © 2014 Cardiological Society of India. Published by Elsevier B.V. All rights reserved.

  3. Primary obstructive megaureter: the role of high pressure balloon dilation.

    PubMed

    Romero, Rosa M; Angulo, Jose Maria; Parente, Alberto; Rivas, Susana; Tardáguila, Ana Rosa

    2014-05-01

    There is a growing interest in minimally invasive treatment of primary obstructive megaureter (POM) in children. The absence of long-term follow-up data, however, makes it difficult to establish the indication for an endoscopic approach. The aim of our study is to determine the long-term efficacy of endourologic high-pressure balloon dilation of the vesicoureteral junction (VUJ) in children with POM that necessitates surgical treatment. We retrospectively reviewed the clinical records from children with POM who were treated with endourologic high-pressure balloon dilation of the VUJ from March 2003 to April 2010. To determine the long-term, a cohort study was conducted in November 2011. Endourologic dilation of the VUJ was performed with a semicompliant high-pressure balloon (2.7 FG) with a minimum balloon size of 3 mm, followed by placement of a Double-J stent. We have treated 29 (32 renal units, left [n=16], right [n=10] and bilateral [n=3]) children with a diagnosis of POM within this period. The median age at the time of the endourologic treatment was 4.04 months (range 1.6-39 months). In three cases, an open ureteral reimplantation was needed, in two cases because of intraoperative technical failure and postoperative Double-J stent migration in one patient. The 26 children (29 renal units) who had a successful endourologic dilation of the VUJ were followed with ultrasonography and MAG-3-Lasix (furosemide) studies that showed a progressive improvement of both the ureterohydronephrosis and drainage in the first 18 months in 20 patients (23 renal units) (69%). In two patients who were treated with a 3 mm balloon, a further dilation was needed, with an excellent outcome. The cohort study (at a median follow-up of 47 months) showed that in all patients who had a good outcome at the 18-month follow-up after endourologic balloon dilation remained asymptomatic with resolution of ureterohydronephrosis on the US and good drainage on the renogram, in the children

  4. Early endoscopic balloon dilation in caustic-induced gastric injury.

    PubMed

    Kochhar, Rakesh; Poornachandra, Kuchhangi Sureshchandra; Dutta, Usha; Agrawal, Amit; Singh, Kartar

    2010-04-01

    There are no reports on endoscopic balloon dilation (EBD) for caustic-induced gastric outlet obstruction (GOO) in the acute or subacute phase. To study the efficacy of early EBD in patients with caustic-induced gastric injury. Tertiary care center in India. Retrospective analysis of data. Out of 41 patients with caustic-induced GOO who reported to us in the subacute phase between January 2001 and December 2008, 31 were treated by EBD. All 31 had ingested an acid 14.39 +/- 4.65 days earlier. EBD was achieved by using wire-guided balloons under endoscopic guidance. The balloon was negotiated across the narrowed segment and inflated for 60 seconds using a pressure gun. Balloons of incremental diameter, up to a maximum of 3 sizes, were used in each sitting. Procedural success was defined as reaching the end point of dilation (15 mm) and absence of symptoms. All 31 patients (18 male, mean age 32.06 +/- 11.04 years) could be successfully dilated. All but 1 underwent successful dilations to achieve the end point of 15 mm, requiring a median of 9 (range 3-18) dilations over a period of 7 (range 1.5-16) weeks. Complications included self-limiting pain (n = 10), bleeding at the time of the procedure (n = 9), and perforation in 1 patient (3.2%) who required surgery. Thirty patients were followed up for a median of 21 (range 3-72) months with no recurrence. Early EBD by an expert endoscopist is a safe and effective treatment modality in the management of caustic-induced GOO. Copyright 2010 American Society for Gastrointestinal Endoscopy. Published by Mosby, Inc. All rights reserved.

  5. Cryo-balloon catheter position planning using AFiT

    NASA Astrophysics Data System (ADS)

    Kleinoeder, Andreas; Brost, Alexander; Bourier, Felix; Koch, Martin; Kurzidim, Klaus; Hornegger, Joachim; Strobel, Norbert

    2012-02-01

    Atrial fibrillation (AFib) is the most common heart arrhythmia. In certain situations, it can result in life-threatening complications such as stroke and heart failure. For paroxsysmal AFib, pulmonary vein isolation (PVI) by catheter ablation is the recommended choice of treatment if drug therapy fails. During minimally invasive procedures, electrically active tissue around the pulmonary veins is destroyed by either applying heat or cryothermal energy to the tissue. The procedure is usually performed in electrophysiology labs under fluoroscopic guidance. Besides radio-frequency catheter ablation devices, so-called single-shot devices, e.g., the cryothermal balloon catheters, are receiving more and more interest in the electrophysiology (EP) community. Single-shot devices may be advantageous for certain cases, since they can simplify the creation of contiguous (gapless) lesion sets around the pulmonary vein which is needed to achieve PVI. In many cases, a 3-D (CT, MRI, or C-arm CT) image of a patient's left atrium is available. This data can then be used for planning purposes and for supporting catheter navigation during the procedure. Cryo-thermal balloon catheters are commercially available in two different sizes. We propose the Atrial Fibrillation Planning Tool (AFiT), which visualizes the segmented left atrium as well as multiple cryo-balloon catheters within a virtual reality, to find out how well cryo-balloons fit to the anatomy of a patient's left atrium. First evaluations have shown that AFiT helps physicians in two ways. First, they can better assess whether cryoballoon ablation or RF ablation is the treatment of choice at all. Second, they can select the proper-size cryo-balloon catheter with more confidence.

  6. Balloon catheter versus basket catheter for endoscopic bile duct stone extraction: a multicenter randomized trial.

    PubMed

    Ishiwatari, Hirotoshi; Kawakami, Hiroshi; Hisai, Hiroyuki; Yane, Kei; Onodera, Manabu; Eto, Kazunori; Haba, Shin; Okuda, Toshinori; Ihara, Hideyuki; Kukitsu, Takehiro; Matsumoto, Ryusuke; Kitaoka, Keisuke; Sonoda, Tomoko; Hayashi, Tsuyoshi

    2016-04-01

    Endoscopic bile duct stone (BDS) removal is a well-established treatment; however, the preference for basket or balloon catheters for extraction is operator-dependent. We therefore conducted a multicenter prospective randomized trial to compare catheter performance. We enrolled patients with a BDS diameter ≤ 10 mm and common bile duct diameter ≤ 15 mm. Participants were randomly assigned to groups that were treated with basket or balloon catheters between October 2013 and September 2014. The primary endpoint was the rate of complete clearance of the duct; the secondary endpoints were the rate and time to complete clearance in one endoscopic session. We initially enrolled 172 consecutive patients; 14 were excluded after randomization. The complete clearance rates were 92.3 % (72/78) in the balloon group and 80.0 % (64 /80) in the basket group. The difference in the rates between the two groups was 12.3 percentage points, indicating non-inferiority of the balloon method (non-inferiority limit -10 %; P < 0.001 for non-inferiority). Moreover, the balloon was superior to the basket (P = 0.037). The rate of complete clearance in one endoscopic session was 97.4 % using the balloon and 97.5 % using the basket (P = 1.00). The median times to complete clearance in one endoscopic session were 6.0 minutes (1 - 30) and 7.8 minutes (1 - 37) in the balloon and basket groups, respectively (P = 0.15). For extraction of BDSs ≤ 10 mm, complete endoscopic treatment with a single catheter is more likely when choosing a balloon catheter over a basket catheter.University Hospital Medical Information Network Trials Registry: UMIN000011887. © Georg Thieme Verlag KG Stuttgart · New York.

  7. Retrograde endopyelotomy: a comparison between laser and Acucise balloon cutting catheter.

    PubMed

    el-Nahas, Ahmed R

    2007-03-01

    Endopyelotomy and laparoscopic pyeloplasty are the preferred modalities for treatment of ureteropelvic junction obstruction because of their minimally invasive nature. There are continuous efforts for improving endopyelotomy techniques and outcome. Retrograde access represents the natural evolution of endopyelotomy. The Acucise cutting balloon catheter (Applied Medical Resources Corp., Laguna Hills, CA) and ureteroscopic endopyelotomy using holmium laser are the most widely accepted techniques. The Acucise catheter was developed to simplify retrograde endopyelotomy and made it possible for all urologists, regardless of their endourologic skills. The Acucise catheter depends on incision and dilatation of the ureteropelvic junction under fluoroscopic guidance, whereas ureteroscopy allows visual control of the site, depth, and extent of the incision; the holmium laser is a perfect method for a clean precise incision. Review of the English literature showed that the Acucise technique was more widely performed, though laser had better (but not statistically significant) safety and efficacy profiles.

  8. [Valvuloplasty with balloon catheter in biologic prosthesis. Reality or illusion].

    PubMed

    Ledesma Velasco, M; Verdín Vázquez, R; Acosta Valdez, J L; Munayer Calderón, J; Salgado Escobar, J L; Arias Monroy, L; Flores Mendoza, J

    1989-01-01

    We performed catheter balloon valvuloplasty (CBV) on 8 stenotic operatively-excised bioprosthetic valves (2 Hancock and 6 Ionescu Shiley). Pathology of valves before CBV included degenerative changes: commissural fusion by mounds of calcific deposits (2 valves), fibrotic and focally calcified leaflets (7 valves) and stiff and thick valves (1 valve). Inflation of the balloon resulted in commissural splitting (2 valves), leaflet cracks and fractures (3 valves). Removal of the deflated balloon catheter was associated with debris dislodgement (3 valves). In one case the valve was unable to close with potential for acute regurgitation. Thus, CBV of bioprosthetic valves can split fused commissures by similar mechanisms as in native valves. CBV may fracture calcific deposits causing acute emboli. It can also disrupt the leaflets causing acute insufficiency. The findings suggest a limited role of CBV in the treatment of stenotic bioprosthetic valves in mitral and aortic position.

  9. Percutaneous Mitral Valve Dilatation: Single Balloon versus Double Balloon - A Finite Element Study

    SciTech Connect

    Schievano, Silvia; Kunzelman, Karyn; Nicosia, Mark

    2009-01-01

    Background: Percutaneous mitral valve (MV) dilatation is performed with either a single balloon (SB) or double balloon (DB) technique. The aim of this study was to compare the two balloon system results using the finite element (FE) method. Methods and Results: An established FE model of the MV was modified by fusing the MV leaflet edges at commissure level to simulate a stenotic valve (orifice area=180mm2). A FE model of a 30mm SB (low-pressure, elastomeric balloon) and an 18mm DB system (high-pressure, non-elastic balloon) was created. Both SB and DB simulations resulted in splitting of the commissures and subsequent stenosismore » dilatation (final MV area=610mm2 and 560mm2 respectively). Stresses induced by the two balloon systems varied across the valve. At the end of inflation, SB showed higher stresses in the central part of the leaflets and at the commissures compared to DB simulation, which demonstrated a more uniform stress distribution. The higher stresses in the SB analysis were due to the mismatch of the round balloon shape with the oval mitral orifice. The commissural split was not easily accomplished with the SB due to its high compliance. The high pressure applied to the DB guaranteed the commissural split even when high forces were required to break the commissure welds. Conclusions: The FE model demonstrated that MV dilatation can be accomplished by both SB and DB techniques. However, the DB method resulted in higher probability of splitting of the fused commissures and less damage caused to the MV leaflets by overstretching.« less

  10. Temporary placement of retrievable fully covered metallic stents versus percutaneous balloon dilation in the treatment of benign biliary strictures.

    PubMed

    Kim, Jin Hyoung; Gwon, Dong Il; Ko, Gi-Young; Sung, Kyu-Bo; Lee, Sung Koo; Yoon, Hyun-Ki; Shin, Ji Hoon; Song, Ho-Young

    2011-06-01

    To compare retrospectively percutaneous transhepatic primary placement of a retrievable self-expanding metallic stent with percutaneous balloon dilation for the treatment of benign biliary strictures. From 2005-2009, 66 patients with benign biliary strictures in whom an endoscopic approach failed or in whom such an approach was inaccessible were evaluated. Of 66 patients, 31 underwent balloon dilation, and 35 underwent temporary metallic stent placement. The etiologies of the benign strictures were anastomotic stricture after surgery (n = 54), stricture secondary to intraoperative injury (n = 9), inflammatory stricture (n = 2), and stricture secondary to trauma (n = 1). The primary patency rates were significantly better in the stent group (87% at 3 years) than in the balloon group (44% at 3 years; P = .022). The indwelling period of percutaneous transhepatic biliary drainage (PTBD) catheters after the initial procedure was able to be significantly reduced in the stent group (median 2.5 months) compared with the balloon group (median 4.5 months; P = .001). Significant bleeding (associated with PTBD) occurred in one patient in the balloon group. In the stent group, stent migration occurred in two patients, and one patient underwent surgery for stent removal after failure of removal under fluoroscopic guidance. Percutaneous primary placement of a retrievable self-expanding metallic stent showed superior intermediate-term results compared with percutaneous balloon dilation for the treatment of benign biliary strictures. In addition, the indwelling period of PTBD catheters can be significantly reduced using temporary stent placement. Copyright © 2011 SIR. Published by Elsevier Inc. All rights reserved.

  11. Effects of supramaximal balloon dilatation pressures on adult cricoid and tracheal cartilage: A cadaveric study.

    PubMed

    Durvasula, Venkata S P B; Shalin, Sara C; Tulunay-Ugur, Ozlem E; Suen, James Y; Richter, Gresham T

    2018-06-01

    Cricoid fracture is a serious concern for balloon dilatation in airway stenosis. Furthermore, there are no studies examining tracheal rupture in balloon dilatation of stenotic segments. The aim of this study was to evaluate the effect of supramaximal pressures of balloons on the cricoid and tracheal rings. Prospective cadaveric study. Seven cadaveric laryngotracheal complexes of normal adults with intact cricothyroid membranes were acquired. Noncompliant vascular angioplasty balloons (BARD-VIDA) were used for dilatation. The subglottis and trachea were subjected to supramaximal dilatation pressures graduated to nominal burst pressure (NBP) and, if necessary, rated burst pressure (RBP). Larger-diameter balloons, starting from 18 mm size to 24 mm, were used. Dilatations were maintained for 3 minutes. The cricoid ring was disrupted by larger-diameter balloons (22 mm and 24 mm) even at lower pressures (less than NBP) in six cases. Tracheal cartilages were very distensible, and external examination after supramaximal dilatation (24 mm close to RBP) revealed no obvious cartilage fractures or trachealis tears. Histopathological examination revealed sloughing of mucosa in the areas corresponding to balloon placement, but no microfractures or disruption of the perichondrium of tracheal ring cartilages. These results indicate that the cricoid is vulnerable to injury from larger balloons even at lower dilatation pressures. The tracheal cartilages and the membranous wall of the trachea remained resilient to supramaximal dilatation and larger balloons. NA. Laryngoscope, 128:1304-1309, 2018. © 2017 The American Laryngological, Rhinological and Otological Society, Inc.

  12. Fluoroscopically guided large balloon dilatation for treating congenital esophageal stenosis in children.

    PubMed

    Hu, Hong-Tao; Shin, Ji Hoon; Kim, Jin-Hyoung; Jang, Jong Keon; Park, Jung-Hoon; Kim, Tae-Hyung; Nam, Deok Ho; Song, Ho-Young

    2015-07-01

    We aimed to evaluate the safety and clinical effectiveness of fluoroscopically guided large balloon dilatation for treating congenital esophageal stenosis in children. Our study included seven children (mean age 4.0 years) who underwent a total of ten balloon dilatation sessions. The initial balloon diameters were 10-15 mm. The technical success, clinical success (improved food intake and reduced dysphagia within 1 month following the first balloon dilatation), dysphagia recurrence, and complications were retrospectively evaluated. Technical and clinical success rates were 100 %. During the mean 38-month follow-up period after the first balloon dilatation, 3 (43 %) patients underwent only one additional balloon dilatation 4-5 months after the first balloon dilatation for dysphagia recurrence. Two of them showed improvement without further recurrence, while the remaining one underwent partial esophagectomy. Well-contained transmural esophageal rupture (type 2) occurred in two (29 %, 2/7) patients and during two (20 %, 2/10) balloon dilatation sessions. All ruptures were successfully treated conservatively. Our study showed that fluoroscopically guided large balloon dilatation seems to be a simple and effective primary treatment technique for congenital esophageal stenosis in children. Esophageal ruptures were not uncommon although they were not fatal.

  13. Percutaneous transluminal balloon dilatation of the mitral valve in pregnancy.

    PubMed

    Smith, R; Brender, D; McCredie, M

    1989-06-01

    Pregnancy can cause life threatening complications in women with mitral stenosis, and there is a substantial risk of fetal death if valvotomy under cardiopulmonary bypass is required. A patient is described in whom pulmonary oedema developed after delivery of her first child by caesarean section 13 months previously. Subsequent cardiac catheterisation showed severe mitral stenosis (valve area 0.96 cm2, valve gradient 12 mm Hg, pulmonary artery pressure 30/16 mm Hg). Before valvotomy could be performed the patient again became pregnant and presented in pulmonary oedema at twenty two weeks' gestation. Medical treatment was unsuccessful and she underwent percutaneous transluminal balloon dilatation of the mitral valve. This increased the valve area to 1.78 cm2 and reduced the transmitral gradient to 6 mm Hg. The procedure was uncomplicated, and she remained symptom free on no medication. She delivered vaginally at 37 weeks' gestation. Percutaneous transluminal balloon dilatation of the mitral valve is a safe and effective alternative to mitral valvotomy in pregnancy.

  14. Initial experience with the Europass: a new ultra-low profile monorail balloon catheter.

    PubMed

    Zimarino, M; Corcos, T; Favereau, X; Tamburino, C; Toussaint, M; Spaulding, C; Guérin, Y

    1994-09-01

    One of the causes for percutaneous transluminal coronary angioplasty (PTCA) failure is the inability to cross the lesion with the balloon catheter after guidewire positioning. The Europass coronary angioplasty catheter is a monorail Duralyn balloon catheter developed to enhance lesion crossability and to overcome this limitation. This system was evaluated in 50 patients in which target lesions were chronic total coronary occlusions (12 cases) or stenoses that could not be reached or crossed by other new monorail balloon catheters. Overall procedural success was obtained in 49/50 patients (98%), using a single Europass balloon catheter in 46/50 patients (92%), with no in-hospital complications. Its low profile, small distal shaft, and excellent trackability allowed successful angioplasty in cases where other catheters failed. This balloon catheter represents a significant advance in angioplasty technology and can be considered as a first-choice device for a safe and expeditious single-operator procedure.

  15. [A simple model for describing pressure-volume curves in free balloon dilatation with reference the dynamics of inflation hydraulic aspects].

    PubMed

    Bloss, P; Werner, C

    2000-06-01

    We propose a simple model to describe pressure-time and pressure-volume curves for the free balloon (balloon in air) of balloon catheters, taking into account the dynamics of the inflation device. On the basis of our investigations of the flow rate-dependence of characteristic parameters of the pressure-time curves, the appropriateness of this simple model is demonstrated using a representative example. Basic considerations lead to the following assumptions: (1) the flow within the shaft of the catheter is laminar, and (ii) the volume decrease of the liquid used for inflation due to pressurization can be neglected if the liquid is carefully degassed prior to inflation, and if the total volume of the liquid in the system is less than 2 ml. Taking into account the dynamics of the inflation device used for pumping the liquid into the proximal end of the shaft during inflation, the inflation process can be subdivided into the following three phases: initial phase, filling phase and dilatation phase. For these three phases, the transformation of the time into the volume coordinates is given. On the basis of our model, the following parameters of the balloon catheter can be determined from a measured pressure-time curve: (1) the resistance to flow of the liquid through the shaft of the catheter and the resulting pressure drop across the shaft, (2) the residual volume and residual pressure of the balloon, and (3) the volume compliance of the balloon catheter with and without the inflation device.

  16. High-pressure balloon dilation in a dog with supravalvular aortic stenosis.

    PubMed

    Pinkos, A; Stauthammer, C; Rittenberg, R; Barncord, K

    2017-02-01

    A 6-month-old female intact Goldendoodle was presented for diagnostic work up of a grade IV/VI left basilar systolic heart murmur. An echocardiogram was performed and revealed a ridge of tissue distal to the aortic valve leaflets at the sinotubular junction causing an instantaneous pressure gradient of 62 mmHg across the supravalvular aortic stenosis and moderate concentric hypertrophy of the left ventricle. Intervention with a high-pressure balloon dilation catheter was pursued and significantly decreased the pressure gradient to 34 mmHg. No complications were encountered. The patient returned in 5 months for re-evaluation and static long-term reduction in the pressure gradient was noted. Copyright © 2016 Elsevier B.V. All rights reserved.

  17. Septotomy and Balloon Dilation to Treat Chronic Leak After Sleeve Gastrectomy: Technical Principles.

    PubMed

    Campos, Josemberg Marins; Ferreira, Flávio Coelho; Teixeira, André F; Lima, Jones Silva; Moon, Rena C; D'Assunção, Marco Aurélio; Neto, Manoel Galvão

    2016-08-01

    Chronic leaks after laparoscopic sleeve gastrectomy (LSG) are often difficult to treat by endoscopy metallic stent. Septotomy has been indicated as an effective procedure, but the technical aspects have not been detailed in previous publications (Campos JM, Siqueira LT, Ferraz AA, et al., J Am Coll Surg 204(4):711, 2007; Baretta G, Campos J, Correia S, et al., Surg Endosc 29(7):1714-20, 2015; Campos JM, Pereira EF, Evangelista LF, et al., Obes Surg 21(10):1520-9, 2011). We herein present a video (6 min) demonstrating the maneuver principles of this technique, showing it as a safe and feasible approach. A 32-year-old male, with BMI 43.4 kg/m(2), underwent LSG. On the tenth POD, he presented with a leak and initially was managed with the following approach: laparoscopic exploration, drainage, endoclips, and 20-mm balloon dilation. However, the leak remained for a period of 6 months. On the endoscopy, a septum was identified between the leak site and gastric pouch, so it was decided to "reshape" this area by septotomy. Septotomy procedure: Sequential incisions were performed using argon plasma coagulation (APC) with 2.5 flow and 50 W (WEM, SP, Brazil) over the septum in order to allow communication between the perigastric cavity (leak site) and the gastric lumen. The principles below must be followed: (1) Scope position: the endoscopist's left hand holds the control body of the gastroscope while the right hand holds the insertion tube; the APC catheter has no need to be fixed. This avoids movements and unprogrammed maneuvers. (2) Before cutting, the septum is placed in the six o'clock position on the endoscopic view, by rotating the gastroscope. (3) The septum is sectioned until the bottom of the perigastric cavity (leak site). (4) That section is made towards the staple line. (5) Just after the septotomy, a Savory-Gilliard guidewire (Cook Medical, Indiana, USA) through the scope must be inserted until the duodenum, followed by 30-mm balloon (Rigiflex®, Boston

  18. First-in-human experience using the Volcano VIBE-RX vascular imaging balloon catheter system (Volcano IVUS-guided Balloon Evaluation - New Zealand: VIBE-NZ Study).

    PubMed

    Watson, Timothy; El-Jack, Seifeddin; Stewart, James T; Ormiston, John

    2013-09-01

    Intravascular ultrasound (IVUS) is a proven and safe imaging modality used to guide percutaneous coronary intervention (PCI). The Volcano VIBE™ RX Vascular Imaging Balloon Catheter is a novel rapid exchange, 0.014" wire-compatible multi-lumen conventional balloon catheter modified with the addition of an IVUS transducer proximal to the balloon, delivered via a standard 6 Fr sheath. We sought to evaluate the safety, balloon performance, and image quality of the VIBE™ RX in patients scheduled for coronary intervention. Patients aged >21 and <85 years with single or multivessel coronary disease scheduled for PCI due to coronary ischaemic symptoms were included. Those with angiographic features that precluded the safe or informative use of the device were excluded. Twenty-nine patients having angiography because of ischaemic symptoms underwent 44 VIBE RX imaging runs, with balloon dilation in 20. Successful device deployment was achieved in all but one patient. All images were adequate and reproducible. One patient had a non-ST-elevation MI felt to be due to the complexity of the procedure rather than directly related to the VIBE™ RX. The study demonstrated the safety and effectiveness of the VIBE™ RX for its intended purpose with minimal failure rate and no directly related complications.

  19. Foley catheter balloon endometrial ablation: successful treatment of three cases.

    PubMed

    Api, Murat; Api, Olus

    2012-03-01

    Endometrial ablation is one of the most effective methods for treatment of dysfunctional uterine bleeding (DUB). Balloon devices with circulating hot water inside or electrodes on the outer surface and radiofrequency-induced thermal destructors are the most recently introduced available tools for endometrial ablation. All of these methods are effective and simple but expensive technologies. The aim of this brief report is to evaluate the effectiveness and safety of a new, simple and money-saving procedure, namely foley catheter balloon endometrial ablation (FCBEA), for treatment of DUB. We present our experience with FCBEA performed on 3 women with severe meno-metrorrhagia unresponsive to medical therapy. There were no procedure-related complications with achievement of complete amenorrhea for a 19 months follow-up period. Although FCBA has yielded encouraging results, there exists a need for further investigation and validation on larger groups, before its universal application.

  20. Onyx Embolization for Isolated Type Dural Arteriovenous Fistula Using a Dual-Lumen Balloon Catheter.

    PubMed

    Kim, Jin Woo; Kim, Byung Moon; Park, Keun Young; Kim, Dong Joon; Kim, Dong Ik

    2016-05-01

    Utilization of a dual-lumen balloon may improve Onyx penetration into isolated dural arteriovenous fistulas (i-DAVFs). To compare the results of Onyx embolization using a dual-lumen balloon with those using a non-balloon catheter for i-DAVFs. Twenty-nine patients underwent Onyx embolization for i-DAVFs using a non-balloon (n = 14) or a dual-lumen balloon catheter (n = 15). Since its introduction, a dual-lumen balloon catheter has been preferred. We compared the dual-lumen balloon group with the non-balloon catheter group regarding angiographic outcome, treatment-related complications, total procedural time, Onyx injection time, and the number of feeders requiring embolization. The dual-lumen balloon group showed complete occlusion of i-DAVFs in 13 and near-complete in 2 patients, while the non-balloon group showed complete occlusion in 5, near-complete in 5, and incomplete in 4 patients (P < .05). Treatment-related complications occurred in 2 patients: 1 in the non-balloon group and 1 in the dual-lumen balloon group. The mean total procedural time was 62 ± 32 minutes in the dual-lumen balloon and 171 ± 88 minutes in the non-balloon group (P < .05). The mean Onyx injection time was 10 ± 6 minutes in the dual-lumen balloon and 49 ± 32 minutes in the non-balloon group (P < .05). The median number of feeders requiring embolization was 1 (range, 1-3) in the dual-lumen balloon and 2 (range, 1-4) in the non-balloon group (P < .05). Utilization of a dual-lumen balloon catheter for Onyx embolization of i-DAVF seemed to significantly increase the immediate complete occlusion rate and decrease total procedural time, Onyx injection time, and number of feeders requiring embolization.

  1. Angioplasty balloon catheters used for distraction of the ankle joint.

    PubMed

    Sartoretti, C; Sartoretti-Schefer, S; Duff, C; Buchmann, P

    1996-02-01

    Arthroscopy of the ankle joint is now routinely performed in diagnostic and therapeutic interventions but is still a demanding and difficult operative procedure in this very small and tight joint. Arthroscopy can be facilitated by a sufficient distraction that gives a better overview of the joint space. However, it is still a matter of debate how to obtain the adequate distraction. Distention by manual strength as well as by the help of a technical device have been proposed. We report our experience with distraction of the ankle joint by the help of one or two intraarticularily located and secondarily insufflated angioplasty balloon catheters that are routinely used in interventional radiology. These special catheters allow a careful and controlled distention of the joint with a fixed space of distraction and, according to our limited experience, without any morbidity.

  2. Malignant Esophagogastric Junction Obstruction: Efficacy of Balloon Dilation Combined with Chemotherapy and/or Radiation Therapy

    SciTech Connect

    Ko, Gi-Young; Song, Ho-Young, E-mail: hysong@amc.seoul.kr; Hong, Heuk-Jin

    2003-04-15

    Purpose: To assess the efficacy of balloon dilation combined with chemotherapy and/or radiation therapy for palliation of dysphagia due to malignant esophagogastric junction strictures. Methods: Fluoroscopically guided balloon dilation was attempted in 20 patients. The causes of strictures were gastric adenocarcinoma (n = 10) and esophageal squamous cell carcinoma (n = 10). Scheduled chemotherapy and/or radiation therapy followed balloon dilation in all patients. Results: There were no technical failures or major complications. After balloon dilation, 15 (75%) patients showed improvement of dysphagia. No patient complained of reflux esophagitis during the follow-up period. Among the 15 patients, seven needed no furthermore » treatment for palliation of dysphagia until their deaths. The remaining eight patients underwent repeat balloon dilation(n = 4) or stent placement (n = 4)3-43 weeks (mean 15 weeks) after the initial balloon dilation because of recurrent dysphagia. Conclusion: Balloon dilation combined with chemotherapy and/or radiation therapy seems to be an easy and reasonably effective palliative treatment for malignant esophagogastric strictures.« less

  3. Balloon catheter sinuplasty and adenoidectomy in children with chronic rhinosinusitis.

    PubMed

    Ramadan, Hassan H; Terrell, Andrew M

    2010-09-01

    Adenoidectomy is the first step in the surgical management of children with chronic rhinosinusitis (CRS). Adenoidectomy, however, is only effective in half of these children. Although endoscopic sinus surgery is effective for CRS, there is concern for facial growth retardation and major complications. We propose that balloon catheter sinuplasty (BCS) is a minimally invasive, effective procedure in the treatment of pediatric CRS. We undertook a nonrandomized, controlled, prospective review of children with failed medical management of CRS who underwent BCS or adenoidectomy. Outcomes were assessed at 1 year of follow-up and were based on SN-5 scores and the need for revision surgery. Forty-nine children who satisfied the inclusion criteria were reviewed. Thirty of the children had BCS. The age range was 4 to 11 years (mean, 7.7 years), and the mean computed tomography score (Lund-Mackay system) was 7.5. Twenty-four of the 30 patients (80%) who underwent BCS showed improvement of their symptoms after 12 months of follow-up, compared with 10 of the 19 patients (52.6%) who underwent adenoidectomy (p < 0.05). A multivariate analysis using logistic regression analysis with age, sex, asthma, and computed tomography score as covariables showed that BCS was also more effective than adenoidectomy in older children. None of the other variables showed statistical significance. Balloon catheter sinuplasty offers a procedure that is more effective than adenoidectomy and less invasive than endoscopic sinus surgery in the treatment of pediatric CRS.

  4. Long-term outcome of conventional endotracheal tube balloon dilation of tracheal stenosis in a dog.

    PubMed

    Kahane, Nili; Segev, Gilad

    2014-01-01

    This report describes a successful dilation of tracheal stenosis in a 16-year-old dog using a conventional endotracheal tube balloon. This technique should be considered as palliative treatment when owners decline other therapeutic options.

  5. Balloon-Inflated Catheters for Enteral Feeding: a Word of Caution.

    PubMed

    Dash, Nihar Ranjan; Singh, Anand Narayan; Kilambi, Ragini

    2018-02-01

    Catheters with inflatable balloons such as a Foley catheter may be used for feeding gastrostomy/jejunostomy. The incorrect or improper use of these catheters can have serious consequences. We report 13 cases of feeding jejunostomy with balloon-inflated catheter's malfunction, some referred to our centre and others operated here over a period of 8 years. The most dramatic consequence of such improper use led to rupture of the small intestine due to inadvertent over-inflation (over 100 ml) of the balloon of the catheter during a contrast study. The patient required a laparotomy with resection and anastomosis of the bowel. Three other patients had similar over-inflation of the balloon leading to severe pain and discomfort. In all three patients, timely deflation of the balloon was sufficient to relieve the symptoms. One patient had intussusception with the inflated balloon acting as a lead point. The patient underwent resection of the small bowel with end jejunostomy and distal mucous fistula. All other patients presented with abdominal pain and distension and intestinal obstruction and were managed non-operatively with deflation of balloon either by aspiration, cutting the balloon port or ultrasound-guided puncture of balloon. Healthcare personnel dealing with patients with indwelling catheters must be educated to suspect, detect and manage such problems. The best measure for such unusual complications of otherwise safe devices would be prevention by training and generation of awareness.

  6. BENIGN IDIOPATHIC ESOPHAGEAL STRICTURE IN A LION ( PANTHERA LEO): DILATION BY AN ACHALASIA BALLOON.

    PubMed

    Ayala, Ignacio; Laredo, Francisco; Escobar; Alberca, Fernando

    2018-03-01

    A 1-yr old female lion ( Panthera leo) was referred with a 10-mo history of dysphagia for solid food (meat), episodic regurgitation, and poor weight gain. Esophagoscopy confirmed an esophagitis (midesophagus) and a stricture estimated to be of 13 mm diameter. This was subsequently dilated using a 20-mm-diameter balloon for 2 min followed by a 35-mm achalasia balloon for 3 min. The etiology remains undetermined in spite of a thorough history. The animal progressed satisfactorily, reaching 124 kg after 1 yr and has had no further signs. To the authors' knowledge, neither idiopathic esophageal stricture nor dilation using an achalasia balloon has been reported in Panthera spp.

  7. Efficacy of Local Molsidomine Delivery from a Hydrogel-Coated Angioplasty Balloon Catheter in the Atherosclerotic Porcine Model

    SciTech Connect

    Rolland, Pierre H.; Mekkaoui, Choukri; Palassi, Maria

    2003-02-15

    Purpose: To evaluate the therapeutic effects of local molsidomine delivery via a hydrogel-coated angioplasty balloon catheter during overstretch angioplasty in atheroscleroticswine iliac vessels. Molsidomine is retained in the arterial wall after local delivery for more than 72 hr and is slowly metabolized intolinsidomine, releasing nitric oxide (NO). Methods: A hydrogel-coated angioplasty balloon catheter was used to both deliver drug locally (150 mg molsidomine or placebo in the contralateral vessel) and dilate iliac vessels in nine Pietrin pigs that had been on an atherogenic diet for 5 months. Animals were killed at 3 hr(n = 2), 24 hr (n = 3)more » and 3 months(n = 3) after treatment. Iliac arteries were examined for wall pulsatility, histomorphometry, cell proliferation and platelet aggregation. Results: No significant therapeutic effects were detected 3 hr after treatment. At 24 hr, wall pulsatility,thrombo resistance and vascular cell homeostasis were significantly restored in the molsidomine-treated versus placebo group. At 3 months,molsidomine inhibited restenotic lesion development, except in scarred areas of histologically detectable adventitial/medial dissection. Conclusion: Local delivery of concentrated molsidomine from a hydrogel-coated angioplasty balloon catheter resulted in early NO-dependent vasodilation/stress normalization and antithrombotic and antiproliferative effects. In the medium term, molsidomine inhibited restenosis in the absence of vessel dissection.« less

  8. Balloon Dilation of the Cartilaginous Portion of the Eustachian Tube.

    PubMed

    Silvola, Juha; Kivekäs, Ilkka; Poe, Dennis S

    2014-07-01

    Studies of balloon Eustachian tuboplasty (BET) have shown encouraging results in small series with short follow-ups. Our pilot study suggested that patients with protracted otitis media with effusion (OME) or atelectasis of the tympanic membrane (TM) could benefit from BET. A prospective study where subjects act as their own controls. Patients from the pilot study and additional cases were enrolled in this cohort with long-term follow-up. Regional Academic Center. Out of 80 patients who underwent BET, 41 consecutive Eustachian tube (ET) operations were included. Subjects' inclusion criteria were OME and/or TM atelectasis, type B or C tympanograms, and inability to inflate their middle ears by Valsalva maneuver. All patients had longstanding ET dysfunction relieved only by repeated tympanostomies. Outcomes included ability to perform a Valsalva maneuver, audiometry, tympanometry, videoendoscopy of the ET with mucosal inflammation rating scores, and otomicroscopy. All cases were dilated successfully, without significant complications. Mean follow-up was 2.5 years (range, 1.5-4.2 years). Eighty percent (33/41) could do a Valsalva maneuver postoperatively; none of these ears required new tympanostomy tubes and subjective symptoms were relieved. Tympanometry results showed overall improvement. Nine patients had persistent perforations and 3 declined removal of the tube. Subjective symptoms were not relieved for 10% (4/41). The results show that BET can effectively improve ET function in ears with OME or atelectasis. The procedure is well tolerated and without significant complications. The follow-up continues and we are investigating possible reasons for failures. © American Academy of Otolaryngology—Head and Neck Surgery Foundation 2014.

  9. Late complications of percutaneous tracheostomy using the balloon dilation technique.

    PubMed

    Araujo, J B; Añón, J M; García de Lorenzo, A; García-Fernandez, A M; Esparcia, M; Adán, J; Relanzon, S; Quiles, D; de Paz, V; Molina, A

    2018-04-01

    The purpose of this study was to determine the late complications in critically ill patients requiring percutaneous tracheostomy (PT) using the balloon dilation technique. A prospective, observational cohort study was carried out. Two medical-surgical intensive care units (ICU). All mechanically ventilated adult patients consecutively admitted to the ICU with an indication of tracheostomy. All patients underwent PT according to the Ciaglia Blue Dolphin ® method, with endoscopic guidance. Survivors were interviewed and evaluated by fiberoptic laryngotracheoscopy and tracheal computed tomography at least 6 months after decannulation. Intraoperative, postoperative and long-term complications and mortality (in-ICU, in-hospital) were recorded. A total of 114 patients were included. The most frequent perioperative complication was minor bleeding (n=20) and difficult cannula insertion (n=19). Two patients had severe perioperative complications (1.7%) (major bleeding and inability to complete de procedure in one case and false passage and desaturation in the other). All survivors (n=52) were evaluated 211±28 days after decannulation. None of the patients had symptoms. Fiberoptic laryngotracheoscopy and computed tomography showed severe tracheal stenosis (>50%) in 2patients (3.7%), both with a cannulation period of over 100 days. Percutaneous tracheostomy using the Ciaglia Blue Dolphin ® technique with an endoscopic guide is a safe procedure. Severe tracheal stenosis is a late complication which although infrequent, must be taken into account due to its lack of clinical expressiveness. Evaluation should be considered in those tracheostomized critical patients who have been cannulated for a long time. Copyright © 2017 Elsevier España, S.L.U. y SEMNIM. All rights reserved.

  10. Onyx embolization using dual-lumen balloon catheter: initial experience and technical note.

    PubMed

    Paramasivam, Srinivasan; Niimi, Yasunari; Fifi, Johanna; Berenstein, Alejandro

    2013-10-01

    Onyx as an embolization agent for the management of vascular malformation is well established. We report our initial experience with dimethyl-sulphoxide (DMSO) compatible double lumen balloon catheters used for Onyx embolization. Between December 2011 and March 2013, we treated 22 patients aged between 1.5 to 70years with two types of DMSO compatible dual-lumen balloon catheters (Scepter C and Ascent) to treat dural arteriovenous fistulas, brain arteriovenous malformation (AVM) with dural feeders, mandibular, facial, lingual, vertebral and paravertebral AVMs. The catheter has good navigability, compliant balloon on inflation formed a "plug" that has more resistance than Onyx plug enhancing better penetration. During injection, the balloon remained stable without spontaneous deflation or rupture and withstood the pressure build-up well. The retrieval of the catheter in most cases took less than a minute (19/28) while in five, it was less than five minutes and in the remaining four, it was longer that includes a trapped catheter on prolonged attempted retrieval resulted in an epidural hematoma, requiring emergent surgical evacuation. The fluoroscopy time is reduced, as we do not form a proximal onyx plug, the injection time is shorter along with easy and instantaneous removal of the catheter after balloon deflation in most cases. Dual-lumen balloon catheter Onyx embolization is a safe and effective technique. Currently, an important tool to circumvent some of the shortcomings associated with Onyx embolization. The catheter has good navigability, the balloon has stability, tolerance, enhances penetrability. It is easy to retrieve the microcatheter. With the experience gained, and with more compliant balloon catheters available, this technique can be applied to cerebral vessels in near future. Copyright © 2013. Published by Elsevier Masson SAS.

  11. Endoluminal dilatation for embedded hemodialysis catheters: A case-control study of factors associated with embedding and clinical outcomes

    PubMed Central

    Talreja, Hari; Ryan, Stephen Edward; Graham, Janet; Sood, Manish M.; Hadziomerovic, Adnan; Clark, Edward

    2017-01-01

    Background With the increasing frequency of tunneled hemodialysis catheter use there is a parallel increase in the need for removal and/or exchange. A small but significant minority of catheters become embedded or ‘stuck’ and cannot be removed by traditional means. Management of embedded catheters involves cutting the catheter, burying the retained fragment with a subsequent increased risk of infections and thrombosis. Endoluminal dilatation may provide a potential safe and effective technique for removing embedded catheters, however, to date, there is a paucity of data. Objectives 1) To determine factors associated with catheters becoming embedded and 2) to determine outcomes associated with endoluminal dilatation Methods All patients with endoluminal dilatation for embedded catheters at our institution since Jan. 2010 were included. Patients who had an embedded catheter were matched 1:3 with patients with uncomplicated catheter removal. Baseline patient and catheter characteristics were compared. Outcomes included procedural success and procedure-related infection. Logistic regression models were used to determine factors associated with embedded catheters. Results We matched 15 cases of embedded tunneled catheters with 45 controls. Among patients with embedded catheters, there were no complications with endoluminal dilatation. Factors independently associated with embedded catheters included catheter dwell time (> 2 years) and history of central venous stenosis. Conclusion Embedded catheters can be successfully managed by endoluminal dilatation with minimal complications and factors associated with embedding include dwell times > 2 years and/or with a history of central venous stenosis. PMID:28346468

  12. Endoscopic Balloon Dilatation of Benign Esophageal Stricture—A Nonhazardous Procedure?

    PubMed Central

    Borgström, Anders; Fork, Frans-Thomas; Lövdahl, Eje

    1994-01-01

    Balloon dilatation of benign esophageal strictures has been widely used since its introduction. We have performed 224 dilatation procedures in 52 patients. Dilatation was done as an outpatient procedure. Strictures were due to reflux esophagitis in 25 patients, anastomatic stenosis in 6, achalasia in 5, complications of sclerotherapy in 5, corrosive lesions in 3, and long-standing nasogastric intubation in 2. The cause was unknown in 6 cases. The intention was to dilate all strictures up to 20 mm. Three major complications occurred, and one of these patients died. The risk of perforation seems to be higher after repeated procedures than during the first one. PMID:18493348

  13. [Imprints of coronary plaque particles in the PTCA balloon surface during the dilatation processing].

    PubMed

    Werner, D; Behrend, D; Schmitz, K P; Urbaszek, W

    1995-05-01

    Seventy-six PTCA-balloons after coronary angioplasty were studied for superficial changes using scanning electron microscopy (SEM) after fixing in glutardialdehyde. Coronary plaque particles were identified on the balloon surface in 52 cases (68%). Twelve new and unused balloons were subjected to the same chemical treatment and SEM showed no imprints. The average length of the longest imprinted plaques was 128 +/- 201 microns and the average number of plaque particles per balloon was 4.9 +/- 2.7. The maximal dilatation pressure and the number of dilatations showed no influence on the impregnation of plaque particles. However, longer plaque imprints tended to occur under low dilatation pressure. Imprints of plaque particles were significantly higher in patients with low cholesterol (p = 0.0001) and low triglycerides (p = 0.0016). No correlation was seen between imprint length and lipid levels. Similarly, the different balloon materials (polyethylene, polyolefincopolymer) showed no significant differences with regard to plaque occurrence. The PTCA-balloons, plaque particles and six coronary plaques obtained after endatherectomy were subjected to energy dispersive x-ray analysis (EDX) under SEM as EDX reveals qualitative and quantitative information about the structural elements. Highly significant differences in calcium, sodium, phosphorus and silicon contents (p = 0.0000) between plaque particles and balloon surface were observed, owing to the absence of these in balloon material. Thus EDX offers additional advantages over SEM in that it clearly differentiates deformed balloon surface, plaque particle, and retained contrast medium. Plaque particles can be recovered from balloon surfaces after PTCA. Depending upon their size, they could lead to coronary spasm or microembolic phenomenon.

  14. 'X-ray'-free balloon dilation for totally ultrasound-guided percutaneous nephrolithotomy.

    PubMed

    Zhou, Tie; Chen, Guanghua; Gao, Xiaofeng; Zhang, Wei; Xu, Chuanliang; Li, Lei; Sun, Yinghao

    2015-04-01

    The objective of the study was to evaluate the feasibility and safety of balloon dilation for 'X-ray'-free ultrasound-guided percutaneous nephrolithotomy (PCNL). From January 2012 to December 2012, patients underwent 'X-ray'-free ultrasound-guided PCNL with Amplatz dilator (Group A). From January 2013 to April 2014, patients underwent 'X-ray'-free ultrasound-guided PCNL with balloon dilator (Group B). For balloon dilation, a 10 F fascial dilator was used to dilate the tract. Subsequently, the 6 F nephrostomy balloon (8 mm in diameter) was indwelled along the guidewire with a marked length equal to the dilation depth. Under the monitoring of ultrasound, the location of balloon was secured and disappearance of balloon waist was confirmed when the balloon was inflated at a pressure of 20 atm. A total of 163 patients were involved in this study. Of 81 procedures in Group A, 45 procedures were performed by a senior urologist while 36 procedures by a resident. Of 82 patients in Group B, 47 procedures were performed by the same senior urologist while 35 procedures by another resident. For the senior urologist, there was no statistically significant difference between two groups in calyx of entry, stone-free rate, decline of hemoglobin and hematocrit, operation time and hospitalization. But for the residents, there was less decline of hemoglobin and hematocrit, tract development time and hospitalization in Group B compared to Group A (0.6 vs. 1.7 g/dl, p = 0.001; 2.3% vs. 5.5%, p = 0.003; 10.1 vs. 11.0 min, p = 0.027; 7.8 vs. 13.9 days, p < 0.001). Balloon dilation method introduced in this study is compensable for tract development when 'X-ray'-free ultrasound-guided PCNL is performed. Modified techniques make totally ultrasound guidance for PCNL feasible, easy and safe. In addition, such a procedure is preferable for initial operators because of less hemorrhage complication.

  15. Endoscopic balloon dilatation as an effective treatment for lower and upper benign gastrointestinal system anastomotic stenosis.

    PubMed

    Akarsu, Cevher; Unsal, Mustafa Gokhan; Dural, Ahmet Cem; Kones, Osman; Kocatas, Ali; Karabulut, Mehmet; Kankaya, Burak; Ates, Mustafa; Alis, Halil

    2015-04-01

    Endoscopic balloon dilatation (EBD) is currently accepted as an effective, safe, and first-line treatment of postoperative benign gastrointestinal anastomosis stenosis (BGAS); however, a limited number of publications on the subject exist in the literature. The aim of the study was to retrospectively evaluate the efficiency of endoscopic dilatation in patients with postoperative intestinal anastomotic stenoses at a single surgical center. Patients with postoperative BGAS treated by EBD at our institution from February 2008 to 2012 were included. The dilatations were all performed using through-the-scope balloons. The balloon was introduced into the stricture using a guidewire under radiologic guidance. Each dilatation session consisted of 2 to 3 two-minute multistep inflations of the balloon until adequate dilatation was achieved. Of the 48 patients included in the study, 44 patients (91.7%) fully recovered and 4 (8.3%) did not respond to treatment. The mean follow-up period was 24 months (range, 3 to 57 mo). Four patients who did not respond to the procedure were treated surgically. Two patients (4.1%) with intestinal perforation during EBD were treated conservatively with a stent. EBD has a low rate of complications and a high success rate, is well tolerated, and avoids further surgical procedures for BGAS. Therefore, EBD should be the first choice of treatment for postoperative anastomotic stenoses.

  16. Endoscopy-guided balloon dilation of benign anastomotic strictures after radical gastrectomy for gastric cancer.

    PubMed

    Lee, Hyun Jik; Park, Wan; Lee, Hyuk; Lee, Keun Ho; Park, Jun Chul; Shin, Sung Kwan; Lee, Sang Kil; Lee, Yong Chan; Noh, Sung Hoon

    2014-07-01

    The aim of this study was to evaluate the outcome of endoscopic dilation for benign anastomotic stricture after radical gastrectomy in gastric cancer patients. Gastric cancer patients who underwent endoscopic balloon dilation for benign anastomosis stricture after radical gastrectomy during a 6-year period were reviewed retrospectively. Twenty-one patients developed benign strictures at the site of anastomosis. The majority of strictures occurred within 1 year after surgery (95.2%). The median duration to stenosis after surgery was 1.70 months (range, 0.17 to 23.97 months). The success rate of the first endoscopic dilation was 61.9%. Between the restenosis group (n=8) and the no restenosis group (n=13), there were no significant differences in the body mass index (22.82 kg/m(2) vs 22.46 kg/m(2)), interval to symptom onset (73.9 days vs 109.3 days), interval to treatment (84.6 days vs 115.6 days), maximal balloon diameter (14.12 mm vs 15.62 mm), number of balloon dilation sessions (1.75 vs 1.31), location of gastric cancer or type of surgery. One patient required surgery because of stricture refractory to repeated dilation. Endoscopic dilation is a highly effective treatment for benign anastomotic strictures after radical gastrectomy for gastric cancer and should be considered a primary intervention prior to proceeding with surgical revision.

  17. Evaluation of a Dedicated Balloon Catheter for Infrapopliteal Difficult Calcified Lesions in Diabetic Patients With Critical Limb Ischemia

    SciTech Connect

    Lupattelli, Tommaso, E-mail: tommasolupattelli@hotmail.com

    2011-02-15

    The purpose of this study was to assess the technical performance and immediate procedural outcome of a new balloon catheter in the treatment of calcified lesions in infrapopliteal arterial disease. Sixty-one patients (81 vessels) with infrapopliteal arterial disease were evaluated. Seventy-four of the 81 treated vessels had total occlusions. The ReeKross 18 peripheral transluminal angioplasty catheter (ClearStream, Wexford, Ireland) is an 0.018-inch guidewire system with 4F sheath compatibility and a rigid shaft intended for enhanced pushability. Only technical procedural outcomes were recorded. In 37 of 61 patients (50 infrapopliteal severely stenosed or occluded vessels), an attempt with a standard balloonmore » was made before the ReeKross 18 was used. In 24 patients, the ReeKross 18 was used as the primary catheter in 23 cases involving crural arteries and in 8 cases involving the foot. The ReeKross 18 crossed the lesion in 55 of 59 (93.2%) patients and 72 of 77 (94.5%) vessels, respectively. Postdilatation results for the 51 patients (64 target lesions) in whom ReeKross 18 balloon dilation was achieved showed <30% residual stenosis in all but 4 patients (5 lesions). Of the patients treated with the ReeKross 18 as the primary catheter, the technical success rate (no adjunctive treatment/stent) was obtained in 20 of 24 (83.3%) patients (27 of 31 [87.1%] target lesions). In the treatment of difficult calcified lesions, the choice of a high-pushability angioplasty catheter, such as the ReeKross 18, warrants consideration.« less

  18. Is side-viewing endoscope assisted balloon dilatation better for corrosive gastric outlet obstruction?

    PubMed

    Katiyar, Prashant; Nijhawan, Sandeep; Saradava, Vimal; Nagaich, Neeraj; Gupta, Gaurav; Mathur, Amit; Nepalia, Subhash

    2013-11-01

    Endoscopic balloon dilatation (EBD) is an effective therapy for caustic-induced gastric outlet obstruction (GOO). Gaining access to the stricture site is the most important step. It is sometimes difficult to negotiate a balloon through the stricture with a front-viewing endoscope due to deformed anatomy of stomach. To overcome this technical difficulty, a side-viewing endoscope can be used. There is limited data regarding the use of side-viewing endoscopes in EBD. We here report on the short-term efficacy and safety of EBD in caustic-induced GOO. In technically difficult cases, a side-viewing endoscope was used for EBD and its efficacy and safety were assessed. The study included 25 patients with caustic-induced GOO. Patients underwent EBD using a through-the-scope balloon. Initial balloon dilatation was performed with a front-viewing endoscope. A side-viewing endoscope was used where negotiation across the stricture failed with a front-viewing endoscope. Dilatation was started at 8 mm diameter and was performed at 1-week intervals. The end point of dilatation was 15 mm diameter. In 18 patients successful balloon dilatation was possible with a front-viewing endoscope. A side-viewing endoscope was used in six patients as negotiation across the stricture was not possible with a front-viewing endoscope. In all six patients negotiation across the stricture followed by successful dilatation was successful with a side-viewing endoscope. Of the 25 patients included in this study, 24 (96%) achieved procedural success (18 with a front-viewing endoscope and 6 with a side-viewing endoscope) in 3-9 sessions. Our results show that EBD is a safe and effective option for caustic-induced GOO and in difficult cases a side-viewing endoscope can be used to achieve technical success.

  19. [Interventional catheter treatment of bypass graft stenosis: comparison of intracoronary stent implantation and balloon angioplasty].

    PubMed

    Heidland, U E; Heintzen, M P; Schoppmann, D; Michel, C J; Strauer, B E

    2000-02-25

    Balloon angioplasty of a stenosed bypass graft has a much higher risk of recurrent stenosis than dilatation of a stenosed native coronary artery. Intracoronary stent implantation has established itself as the better treatment of native coronary artery stenosis than conventional balloon angioplasty. However, there is still uncertainty whether intracoronary stent implantation in stenosed bypass vessels gives better long-term results than conventional balloon angioplasty. Results were retrospectively analyzed of unrandomized 224 primarily successful interventions--122 balloon dilatations and 102 stent implantations--performed between January 1996 and June 1998 on stenosed coronary bypass grafts, re-examined by coronary angiography an average of 6 months later. All but 11 patients were on combined aspirin and ticlopidine antiplatelet aggregation treatment. There was a significantly lower 6-month restenosis rate (30.4%) after stent implantation than after balloon dilatation (51.6%). The re-intervention rate was also significantly lower after stent implantation. These data suggest that stent implantation of stenosed coronary bypass grafts under cover of platelet-aggregation inhibition with aspirin and ticlopidine provides a lower restenosis and thus higher revascularization rate than conventional balloon dilatation.

  20. Application of new balloon catheters in the treatment of congenital heart defects

    PubMed Central

    Fiszer, Roland; Szkutnik, Małgorzata; Smerdziński, Sebastian; Chodór, Beata; Białkowski, Jacek

    2016-01-01

    Introduction Balloon angioplasty (BAP) and aortic or pulmonary balloon valvuloplasty (BAV, BPV) are well-established treatment options in congenital heart defects. Recently, significant technological progress has been made and new catheters have been implemented in clinical practice. Aim To analyze the results of BAP, BAV and BPV with the new balloon catheter Valver and its second generation Valver II, which the company Balton (Poland) launched and developed. These catheters have not been clinically evaluated yet. Material and methods We performed 64 interventions with Valver I and Valver II. With Valver I the following procedures were performed: 17 BPV (including 9 in tetralogy of Fallot – TOF), 10 BAV and 27 BAP in coarctations of the aorta (CoA) – including 9 native and 18 after surgery. With Valver II ten interventions were done – 3 BPV, 2 pulmonary supravalvular BAP (after switch operations), 2 BAP of recoarctations and 3 other BAP. Age of the patients ranged from a few days to 40 years. Results All procedures were completed successfully, without rupture of any balloon catheters. The pressure gradient drop was statistically significant in all groups: BPV in isolated pulmonary valvular stenosis 28.1 mm Hg (mean), BPV in TOF 18.7 mm Hg, BAV 32.8 mm Hg, BAP in native CoA 15.4 mm Hg and in recoarctations 18.6 mm Hg. In 3 cases during rapid deflation of Valver I, wrinkles of the balloons made it impossible to insert the whole balloon into the vascular sheath (all were removed surgically from the groin). No such complication occured with Valver II. Conclusions Valver balloon catheters are an effective treatment modality in different valvular and vascular stenoses. PMID:27625686

  1. Utility of Adjunctive Procedures With Balloon Dilation of the Eustachian Tube.

    PubMed

    Ashry, Yehia; Kawai, Kosuke; Poe, Dennis

    2017-12-01

    To assess the role and effect of concomitant adjunctive procedures when combined with balloon dilation of the Eustachian tube (BDET), including a new technique for treating obstructive disease within the bony Eustachian tube (ET). Retrospective case series. Tertiary medical center. Adults with persistent (≥2 years): 1) OME or non-fixed TM retraction AND type B or C tympanogram OR 2) Consistent symptoms of barochallenge with flights or diving, all despite medical treatment for ≥6 weeks. Balloon dilation of the cartilaginous ET (BDET) was performed under general anesthesia using concomitant myringotomy with or without tube placement if indicated. Adjunctive turbinectomy, adenoidectomy, and/or tympanoplasty were used in selected cases. For suspected disease in the bony ET, an illuminated guidewire was used for probing and clearing the lumen. Outcome measures were tympanogram, otomicroscopy, ET mucosal inflammation score, Valsalva maneuver, and PTA audiometry. 67 ETs (48 patients) underwent BDET: 1) 30/67 balloon w/wo myringotomy, w/wo tube, 2) 20/67 plus adjunctive procedure or 3) 17/67 plus guidewire. Follow-up was ranging from 0.4 to 3.4 years (mean 1.3 year, SD = 0.7). Significant improvement occurred in 79%. There was no significant difference in the failure rate comparing balloon dilation with adjunctive procedures 5/20 (25%) or without adjunctive procedures; 4/30 p  = 0.45 (13%). Failure rate for BDET plus guide wire was 5/17 (29%) and resistance within the bony ET occurred in 8/17 (47%). Balloon dilation of the cartilaginous ET demonstrated significant improvement despite expansion of indications that necessitated the addition of adjunctive procedures. 4.

  2. Utility of Adjunctive Procedures With Balloon Dilation of the Eustachian Tube

    PubMed Central

    Ashry, Yehia; Kawai, Kosuke

    2017-01-01

    Objective To assess the role and effect of concomitant adjunctive procedures when combined with balloon dilation of the Eustachian tube (BDET), including a new technique for treating obstructive disease within the bony Eustachian tube (ET). Study Design Retrospective case series. Setting Tertiary medical center. Subjects Adults with persistent (≥2 years): 1) OME or non‐fixed TM retraction AND type B or C tympanogram OR 2) Consistent symptoms of barochallenge with flights or diving, all despite medical treatment for ≥6 weeks. Methods Balloon dilation of the cartilaginous ET (BDET) was performed under general anesthesia using concomitant myringotomy with or without tube placement if indicated. Adjunctive turbinectomy, adenoidectomy, and/or tympanoplasty were used in selected cases. For suspected disease in the bony ET, an illuminated guidewire was used for probing and clearing the lumen. Outcome measures were tympanogram, otomicroscopy, ET mucosal inflammation score, Valsalva maneuver, and PTA audiometry. Results 67 ETs (48 patients) underwent BDET: 1) 30/67 balloon w/wo myringotomy, w/wo tube, 2) 20/67 plus adjunctive procedure or 3) 17/67 plus guidewire. Follow‐up was ranging from 0.4 to 3.4 years (mean 1.3 year, SD = 0.7). Significant improvement occurred in 79%. There was no significant difference in the failure rate comparing balloon dilation with adjunctive procedures 5/20 (25%) or without adjunctive procedures; 4/30 p = 0.45 (13%). Failure rate for BDET plus guide wire was 5/17 (29%) and resistance within the bony ET occurred in 8/17 (47%). Conclusion Balloon dilation of the cartilaginous ET demonstrated significant improvement despite expansion of indications that necessitated the addition of adjunctive procedures. Level of Evidence 4 PMID:29299505

  3. Use of mechanical devices for distal hemoperfusion during balloon catheter coronary angioplasty.

    PubMed

    Heibig, J; Angelini, P; Leachman, D R; Beall, M M; Beall, A C

    1988-01-01

    Previous attempts to protect the dependent myocardium during balloon catheter coronary angioplasty in animals and humans have had generally unsatisfactory results. This paper summarizes the authors' experience in investigating commercially available mechanical pumps for distal coronary hemoperfusion during balloon angioplasty. Both roller and piston pumps can attain adequate distal perfusion without significant side effects in the majority of patients. Our goal was to suppress angina for at least 5 min to prolong balloon inflation in awake patients. Minor T-wave changes without concomitant angina pectoris can be expected when the distal coronary bed is perfused with hypothermic blood. Side branch occlusion by the inflated balloon prevents effective protection of the corresponding part of the dependent myocardium during distal hemoperfusion, which may result in persistent angina and ST-T changes uncorrected by increasing the hemoperfusion rate. Distal coronary diffuse spasm, rare and transient, was the only immediate complication of this procedure. It is suggested that intense local wall stimulation could occur with a higher flow rate (jet effect). Improved balloon catheter pressure/flow characteristics and on-line continuous mechanical pumps should soon make distal coronary hemoperfusion through balloon catheters an accepted clinical technique.

  4. Balloon or bougie for dilatation of benign oesophageal stricture? An interim report of a randomised controlled trial.

    PubMed Central

    Cox, J G; Winter, R K; Maslin, S C; Jones, R; Buckton, G K; Hoare, R C; Sutton, D R; Bennett, J R

    1988-01-01

    Seventy one patients with benign oesophageal strictures were randomised to receive balloon or bougie dilatation. Sixty five patients were eligible for analysis. At the end of five months the balloon group had significantly more dysphagia and the calibre of the strictures in the balloon group had narrowed by a greater degree. The methods were equally safe and acceptable to patients. While the choice of the method of dilatation depends on the individual patient's needs and operator experience, bougie dilatation is more effective in reducing dysphagia and maintaining stricture patency. Images Fig. 2 Fig. 3 PMID:3065156

  5. Initial Experience with Balloon-Occluded Trans-catheter Arterial Chemoembolization (B-TACE) for Hepatocellular Carcinoma

    SciTech Connect

    Maruyama, Mitsunari, E-mail: mitunari@med-shimane.u.ac.jp; Yoshizako, Takeshi, E-mail: yosizako@med.shimane-u.ac.jp; Nakamura, Tomonori, E-mail: t-naka@med.shimane-u.ac.jp

    2016-03-15

    PurposeThis study was performed to evaluate the accumulation of lipiodol emulsion (LE) and adverse events during our initial experience of balloon-occluded trans-catheter arterial chemoembolization (B-TACE) for hepatocellular carcinoma (HCC) compared with conventional TACE (C-TACE).MethodsB-TACE group (50 cases) was compared with C-TACE group (50 cases). The ratio of the LE concentration in the tumor to that in the surrounding embolized liver parenchyma (LE ratio) was calculated after each treatment. Adverse events were evaluated according to the Common Terminology Criteria for Adverse Effects (CTCAE) version 4.0.ResultsThe LE ratio at the level of subsegmental showed a statistically significant difference between the groups (tmore » test: P < 0.05). Only elevation of alanine aminotransferase was more frequent in the B-TACE group, showing a statistically significant difference (Mann–Whitney test: P < 0.05). While B-TACE caused severe adverse events (liver abscess and infarction) in patients with bile duct dilatation, there was no statistically significant difference in incidence between the groups. Multivariate logistic regression analysis suggested that the significant risk factor for liver abscess/infarction was bile duct dilatation (P < 0.05).ConclusionThe LE ratio at the level of subsegmental showed a statistically significant difference between the groups (t test: P < 0.05). B-TACE caused severe adverse events (liver abscess and infarction) in patients with bile duct dilatation.« less

  6. Balloon dilation of the eustachian tube in a cadaver model: technical considerations, learning curve, and potential barriers.

    PubMed

    McCoul, Edward D; Singh, Ameet; Anand, Vijay K; Tabaee, Abtin

    2012-04-01

    The surgical management options for eustachian tube dysfunction have historically been limited. The goal of the current study was to evaluate the technical considerations, learning curve, and potential barriers for balloon dilation of the eustachian tube (BDET) as an alternative treatment modality. Prospective preclinical trial of BDET in a cadaver model. A novel balloon catheter device was used for eustachian tube dilation. Twenty-four BDET procedures were performed by three independent rhinologists with no prior experience with the procedure (eight procedures per surgeon). The duration and number of attempts of the individual steps and overall procedure were recorded. Endoscopic examination of the eustachian tube was performed after each procedure, and the surgeon was asked to rate the subjective difficulty on a five-point scale. Successful completion of the procedure occurred in each case. The overall mean duration of the procedure was 284 seconds, and a mean number of 1.15 attempts were necessary to perform the individual steps. The mean subjective procedure difficulty was noted as somewhat easy. Statistically shorter duration and subjectively easier procedure were noted in the second compared to the first half of the series, indicating a favorable learning curve. Linear fissuring within the eustachian tube lumen without submucosal disruption (nine procedures, 37%) and with submucosal disruption (five procedures, 21%) were noted. The significance of these physical findings is unclear. Preclinical testing of BDET is associated with favorable duration, learning curve, and overall ease of completion. Clinical trials are necessary to evaluate safety and efficacy. Copyright © 2012 The American Laryngological, Rhinological, and Otological Society, Inc.

  7. Dilation of the ascending aorta after balloon valvuloplasty for aortic stenosis during infancy and childhood.

    PubMed

    McElhinney, Doff B; Lacro, Ronald V; Gauvreau, Kimberlee; O'Brien, Cheryl M; Yaroglu Kazanci, Selcen; Vogel, Melanie; Emani, Sitaram; Brown, David W

    2012-09-01

    Dilation of the ascending aorta (AA) is common in patients with a bicuspid aortic valve. The natural history of the aortic root and AA and the risk factors for dilation have not been characterized in patients with congenital aortic stenosis (AS) treated with balloon valvuloplasty during childhood. The present study was performed to determine the prevalence of aortic dilation in patients with congenital AS before and up to 20 years after balloon valvuloplasty performed during childhood. In patients who underwent balloon valvuloplasty for AS at age ≤ 18 years from 1984 to 2005, the aortic diameter measurements before intervention and at 5-year intervals afterward were recorded and the Z scores calculated. Among 156 patients (median age 1.5 years at valvuloplasty), the AA Z scores were significantly larger than normal before intervention (median Z score 1.5) and at all follow-up points (all p <0.001). Using mixed modeling, with time as a categorical variable (before intervention, 5-year window, 10-year window, and so forth), the mean AA Z score was greater at all postvalvuloplasty points than before the intervention, with mean Z score increases of 1.20 at 5 years and 2.11 at 20 years (p <0.001). Moderate or greater aortic regurgitation early after valvuloplasty was associated with greater AA Z scores than mild or less aortic regurgitation, with a progressive difference over time. More significant residual AS after valvuloplasty was associated with lower AA Z scores over time. In conclusion, AA dilation is common in children with congenital AS and continues to progress over many years after balloon valvuloplasty. Copyright © 2012 Elsevier Inc. All rights reserved.

  8. Bronchoscopic management of benign bronchial stenosis by electrocautery and balloon dilatation.

    PubMed

    Garg, M; Gogia, Pratibha; Manoria, P; Goyal, R

    2012-01-01

    Benign bronchial stenosis is managed by surgical or bronchoscopic methods. Although surgical approach is definitive, it is technically demanding and is costlier than bronchoscopic treatment. Here, we report the case of a 27-year-old female patient with symptomatic benign bronchial stenosis of the left main bronchus. The stenosis was dilated successfully through a fibreoptic bronchoscope by electrocautery followed by balloon bronchoplasty and application of mitomycin-C. On follow up, there was no evidence of re-stenosis.

  9. Is endoscopic papillary large balloon dilation safe for treating large CBD stones?

    PubMed

    Shim, Chan Sup; Kim, Ji Wan; Lee, Tae Yoon; Cheon, Young Koog

    2016-01-01

    In recent years, endoscopic papillary large balloon dilation (EPLBD) with endoscopic sphincterotomy (EST) has been shown to be an effective technique for the removal of large or difficult common bile duct (CBD) stones, as an alternative to EST. Reviewing the literature published since 2003, it is understood that EPLBD has fewer associated overall complications than EST. Bleeding occurred less frequently with EPLBD than with EST. There was no significant difference in postendoscopic retrograde cholangiopancreatography pancreatitis or perforation. Recent accumulated results of EPLBD with or even without EST suggest that it is a safe and effective procedure for the removal of large or difficult bile duct stones without any additional risk of severe adverse events, when performed under appropriate guidelines. Since use of a larger balloon can tear the sphincter as well as the bile duct, possibly resulting in bleeding and perforation, a balloon size that is equal to or smaller in diameter than the diameter of the native distal bile duct is recommended. The maximum transverse diameter of the stone and the balloon-stone diameter ratio have a tendency to affect the success or failure of complete removal of stones by large balloon dilation to prevent adverse effects such as perforation and bleeding. One should take into account the size of the native bile duct, the size and burden of stones, the presence of stricture of distal bile duct, and the presence of the papilla in or adjacent to a diverticulum. Even though the results of EPLBD indicate that it is a relatively safe procedure in patients with common duct stones with a dilated CBD, the recommended guidelines should be followed strictly for the prevention of major adverse events such as bleeding and perforation.

  10. Cutting balloon and high-pressure balloon dilation for palliative treatment of congenital double-chambered right ventricle and primary infundibular stenosis in a Golden retriever dog.

    PubMed

    Schober, Karsten E; Rhinehart, Jaylyn; Kohnken, Rebecca; Bonagura, John D

    2017-12-01

    Combined cutting balloon and high-pressure balloon dilation was performed in a dog with a double-chambered right ventricle and severe infundibular stenosis of the right ventricular outflow tract. The peak systolic pressure gradient across the stenosis decreased by 65% after dilation (from 187 mmHg before to 66 mmHg after) affirming the intervention as successful. However, early re-stenosis occurred within 3 months leading to exercise intolerance, exercise-induced syncope, and right-sided congestive heart failure. Cutting balloon followed by high-pressure balloon dilation provided temporary but not long-term relief of right ventricular obstruction in this dog. Copyright © 2017 Elsevier B.V. All rights reserved.

  11. Benign Post-Radiation Rectal Stricture Treated with Endoscopic Balloon Dilation and Intralesional Triamcinolone Injection

    PubMed Central

    Karanikas, Michael; Touzopoulos, Panagiotis; Mitrakas, Alexandros; Zezos, Petros; Zarogoulidis, Paul; Machairiotis, Nikolaos; Efremidou, Eleni; Liratzopoulos, Nikolaos; Polychronidis, Alexandros; Kouklakis, George

    2012-01-01

    Post-radiation stricture is a rare complication after pelvis irradiation, but must be in the mind of the clinician evaluating a lower gastrointestinal obstruction. Endoscopy has gained an important role in chronic radiation proctitis with several therapeutic options for management of intestinal strictures. The treatment of rectal strictures has been limited to surgery with high morbidity and mortality. Therefore, a less invasive therapeutic approach for benign rectal strictures, endoscopic balloon dilation with or without intralesional steroid injection, has become a common treatment modality. We present a case of benign post-radiation rectal stricture treated successfully with balloon dilation and adjuvant intralesional triamcinolone injection. A 70-year-old woman presented to the emergency room complaining for 2 weeks of diarrhea and meteorism, 11 years after radiation of the pelvis due to adenocarcinoma of the uterus. Colonoscopy revealed a stricture at the rectum and multiple endoscopic biopsies were obtained from the stricture. The stricture was treated with endoscopic balloon dilation and intralesional triamcinolone injection. The procedure appears to have a high success rate and a very low complication rate. Histologic examination of the biopsies revealed non-specific inflammatory changes of the rectal mucosa and no specific changes of the mucosa due to radiation. All biopsies were negative for malignancy. The patient is stricture-free 12 months post-treatment. PMID:23271987

  12. Balloon dilatation in esophageal strictures in epidermolysis bullosa and the role of anesthesia.

    PubMed

    Gollu, Gulnur; Ergun, Ergun; Ates, Ufuk; Can, Ozlem S; Dindar, Huseyin

    2017-02-01

    Esophageal involvement, which causes stricture, is a complication in epidermolysis bullosa. This causes dysphagia and malnutrition and leads to deterioration of skin lesions in these patients. The charts of 11 patients with epidermolysis bullosa and esophageal stricture who were included into dilatation program between 2003 and 2015 were retrospectively reviewed. Seven of the patients were female and four were male. The median age was 14 (2-32) years. The mean body weight of patients was 27.8 (9-51) kg. The location and number of strictured parts of the esophagus were previously evaluated with upper gastrointestinal contrast study and after that flexible endoscopy was used for dilatation. Eight patients had middle esophageal, three patients had proximal esophageal and one of them had both proximal and middle esophageal strictures. The strictures were dilated 56 times in total (mean 5 times). One patient underwent gastrostomy and was medically followed-up after a perforation occurrence during the dilatation procedure. In a 32-year-old female patient, colon interposition was performed after four dilatations since optimal nutritional and developmental status could not be achieved. The dilatation program of nine patients is still in progress. Seven of them can easily swallow solid food but two of them have some difficulties in swallowing between dilatations. One patient rejected the program and quitted, while one patient refused colon interposition and died because of complications related to amyloidosis during the dilatation program. After resolution of the swallowing problem, skin lesions were observed to heal quickly. Epidermolysis bullosa is a rare cause of dysphagia. Esophageal balloon dilatation with flexible endoscopy is a safe and efficient method in patients with this condition. © 2016 International Society for Diseases of the Esophagus.

  13. Stability and Agreement of a Microtransducer and an Air-Filled Balloon Esophageal Catheter in the Monitoring of Esophageal Pressure.

    PubMed

    Augusto, Renan Maloni; Albuquerque, André Luis Pereira; Jaeger, Thomas; de Carvalho, Carlos Roberto Ribeiro; Caruso, Pedro

    2017-02-01

    The use of esophageal catheters with microtransducer promises advantages over traditional catheters with air-filled balloons. However, performance comparisons between these 2 types of catheters are scarce and incomplete. A catheter with a 9.5-cm air-filled balloon at the distal tip and a catheter with a microtransducer mounted within a flexible silicone rubber were tested in vitro and in vivo. In vitro, the response times of both catheters were compared, and the drift of the baseline pressure of the microtransducer catheter was evaluated over a 6-h period. In vivo, 11 healthy volunteers had both catheters inserted, and the drift of the baseline esophageal pressure was measured over a 3-h period. Also, the correlation and agreement of the baseline and changes in the esophageal pressure of both catheters were evaluated. In vitro, the microtransducer catheter had a response time significantly higher (262 × 114 Hz, P < .01) and a good pressure stability, with a mean baseline pressure drift of 1.4 cm H 2 O. In vivo, both catheters presented a small and similar baseline esophageal pressure drift (P = 0.08). For measurements of baseline and changes in esophageal pressure, the correlation and agreement between the catheters were poor, with a large bias between them. The catheter with the microtransducer had a small baseline pressure drift, similar to the air-filled balloon catheter. The low agreement between the catheters does not allow the microtransducer catheter to be used as a surrogate for the traditional air-filled balloon catheter. Copyright © 2017 by Daedalus Enterprises.

  14. Factors associated with complications or failure of endoscopic balloon dilation of anastomotic stricture secondary to Roux-en-Y gastric bypass surgery.

    PubMed

    de Moura, Eduardo G H; Orso, Ivan R B; Aurélio, Eduardo F; de Moura, Eduardo T H; de Moura, Diogo T H; Santo, Marco A

    2016-01-01

    Roux-en-Y gastric bypass is a commonly used technique of bariatric surgery. One of the most important complications is gastrojejunal anastomotic stricture. Endoscopic balloon dilation appears to be well tolerated and effective, but well-designed randomized, controlled trials have not yet been conducted. Identify factors associated with complications or failure of endoscopic balloon dilation of anastomotic stricture secondary to Roux-en-Y gastric bypass surgery. Gastrointestinal endoscopy service, university hospital, Brazil. The records of 64 patients with anastomotic stricture submitted to endoscopic dilation with hydrostatic balloon dilation were reviewed. Information was collected on gastric pouch length, anastomosis diameter before dilation, number of dilation sessions, balloon diameter at each session, anastomosis diameter after the last dilation session, presence of postsurgical complications, endoscopic complications, and outcome of dilation. Comparisons were made among postsurgical and endoscopic complications; number of dilations, balloon diameter; anastomosis diameter before dilation; and dilation outcome. Success of dilation treatment was 95%. Perforation was positively and significantly associated with the number of dilation sessions (P = .03). Highly significant associations were found between ischemic segment and perforation (P<.001) and between ischemic segment and bleeding (P = .047). Ischemic segment (P = .02) and fistula (P = .032) were also associated with dilation failure. Ischemic segment and fistula were found to be important risk factors for balloon dilation failure. The greater the number of dilation sessions, the greater the number of endoscopic complications. Copyright © 2016 American Society for Metabolic and Bariatric Surgery. Published by Elsevier Inc. All rights reserved.

  15. Electrocautery vs non-electrocautery dilation catheters in endoscopic ultrasonography-guided pancreatic fluid collection drainage

    PubMed Central

    Kitamura, Katsuya; Yamamiya, Akira; Ishii, Yu; Nomoto, Tomohiro; Honma, Tadashi; Yoshida, Hitoshi

    2016-01-01

    AIM: To investigate the safety and utility of an electrocautery dilation catheter for endoscopic ultrasonography (EUS)-guided pancreatic fluid collection drainage. METHODS: A single-center, exploratory, retrospective study was conducted between August 2010 and August 2014. This study was approved by the Medical Ethics Committee of our institution. Informed, written consent was obtained from each patient prior to the procedure. The subjects included 28 consecutive patients who underwent EUS-guided transmural drainage (EUS-TD) for symptomatic pancreatic and peripancreatic fluid collections (PFCs) by fine needle aspiration using a 19-gauge needle. These patients were retrospectively divided into two groups based on the use of an electrocautery dilation catheter as a fistula dilation device; 15 patients were treated with an electrocautery dilation catheter (electrocautery group), and 13 patients were treated with a non-electrocautery dilation catheter (non-electrocautery group). We evaluated the technical and clinical successes and the adverse events associated with EUS-TD for the treatment of PFCs between the two groups. RESULTS: There were no significant differences in age, sex, type, location and diameter of PFCs between the groups. Thirteen patients (87%) in the electrocautery group and 10 patients (77%) in the non-electrocautery group presented with infected PFCs. The technical success rates of EUS-TD for the treatment of PFCs were 100% (15/15) and 100% (13/13) for the electrocautery and the non-electrocautery groups, respectively. The clinical success rates of EUS-TD for the treatment of PFCs were 67% (10/15) and 69% (9/13) for the electrocautery and the non-electrocautery groups, respectively (P = 0.794). The procedure time of EUS-TD for the treatment of PFCs in the electrocautery group was significantly shorter than that of the non-electrocautery group (mean ± SD: 30 ± 12 min vs 52 ± 20 min, P < 0.001). Adverse events associated with EUS-TD for the treatment

  16. Nasobiliary drainage after endoscopic papillary balloon dilatation may prevent postoperative pancreatitis

    PubMed Central

    Xu, Xiao-Dan; Dai, Jian-Jun; Qian, Jian-Qing; Wang, Wei-Jun

    2015-01-01

    AIM: To evaluate the necessity of endoscopic nasobiliary drainage (ENBD) catheter placement after clearance of common bile duct (CBD) stones. METHODS: Patients enrolled in this study were randomly divided into two groups, according to whether or not they received ENBD after the removal of CBD stones. Group 1 (ENBD group) was then subdivided into three groups: G1a patients received an endoscopic papillary balloon dilatation (EPBD), G1b patients received an endoscopic sphincterotomy (EST), and G1c patients received neither. Group 2 (non-ENBD group) patients were also subdivided into three groups (G2a, G2b, and G2c), similar to Group 1. The maximum CBD diameter, the time for C-reactive protein (CRP) to normalize, levels of serum amylase, total serum bilirubin (TB) and alanine aminotransferase (ALT), and postoperative hospitalization duration (PHD) were measured. RESULTS: A total of 218 patients (139 males, 79 females), with an average age of 60.1 ± 10.8 years, were enrolled in this study. One hundred and thirteen patients who received ENBD were included in Group 1, and 105 patients who did not receive ENBD were included in Group 2. The baseline clinical characteristics were similar in both groups. There were no significant differences in post-endoscopic retrograde cholangiopancreatography (ERCP)-related complications when Groups 1 and 2 were compared. Seventy-seven patients underwent EPBD, and 41 received an ENBD tube (G1a) and 36 did not (G2a). Seventy-three patients underwent EST, and 34 patients received an ENBD tube (G1b) and 39 did not (G2b). The remaining 68 patients underwent neither EPBD nor EST; of these patients, 38 received an ENBD tube (G1c) and 30 did not (G2c). For each of the three pairs of subgroups (G1a vs G2a, G1b vs G2b, G1c vs G2c), there were no significant differences detected in the PHD or the time to normalization of CRP, TB and ALT. In the EPBD group, the incidence of post-ERCP pancreatitis, hyperamylasemia and overall patient complications

  17. Very high-pressure dilatation for undilatable coronary lesions: indications and results with a new dedicated balloon.

    PubMed

    Secco, Gioel Gabrio; Ghione, Matteo; Mattesini, Alessio; Dall'Ara, Gianni; Ghilencea, Liviu; Kilickesmez, Kadriye; De Luca, Giuseppe; Fattori, Rossella; Parisi, Rosario; Marino, Paolo Nicola; Lupi, Alessandro; Foin, Nicolas; Di Mario, Carlo

    2016-06-20

    Calcific coronary lesions impose a rigid obstacle to optimal balloon and stent expansion and the 20 to 30 atm limit that non-compliant (NC) balloons reach can be insufficient. The aim of our study was to evaluate the safety and efficacy of a new dedicated super high-pressure NC balloon (OPN NC®; SIS Medical AG, Winterthur, Switzerland). We retrospectively evaluated a consecutive series of 91 lesions in which conventional NC balloons at maximal pressure failed to achieve an adequate post-dilatation luminal gain and were therefore treated with an OPN NC balloon up to 40 atm. Angiographic success was defined as residual angiographic diameter stenosis <30%. MLD and %DS were measured at baseline, after NC balloon, OPN NC balloon and stent implantation. Angiographic success was achieved in 84 lesions (92.3%). All of the remaining lesions received rotational atherectomy with the exception of two cases in which rotational atherectomy was not attempted because of small vessel size and excessive tortuosity. MLD and acute gain were significantly greater and %DS was significantly lower post OPN NC balloon compared with conventional NC balloon inflation (p<0.001). No coronary perforations occurred. No acute or 30-day follow-up MACE was reported. When conventional NC balloons fail, the new OPN NC dedicated high-pressure balloon provides an effective and safe alternative strategy for the dilatation of resistant coronary lesions.

  18. Delivery of Plasmid DNA to Vascular Tissue in vivo using Catheter Balloons Coated with Polyelectrolyte Multilayers

    PubMed Central

    Saurer, Eric M.; Yamanouchi, Dai; Liu, Bo; Lynn, David M.

    2010-01-01

    We report an approach for the localized delivery of plasmid DNA to vascular tissue from the surfaces of inflatable embolectomy catheter balloons. Using a layer-by-layer approach, ultrathin multilayered polyelectrolyte films were fabricated on embolectomy catheter balloons by alternately adsorbing layers of a hydrolytically degradable poly(β-amino ester) and plasmid DNA. Fluorescence microscopy revealed that the films coated the surfaces of the balloons uniformly. Coated balloons that were incubated in phosphate-buffered saline at 37 °C released ~25 μg DNA/cm2 over 24 hours. Analysis of the DNA by gel electrophoresis showed that the DNA was released in open-circular (‘nicked’) and supercoiled conformations, and in vitro cell transfection assays confirmed that the released DNA was transcriptionally active. Arterial injury was induced in the internal carotid arteries of Sprague-Dawley rats using uncoated balloons, followed by treatment with film-coated balloons for 20 minutes. X-gal, immunohistochemical, and immunofluorescence staining of sectioned arteries indicated high levels of β-galactosidase or enhanced green fluorescent protein (EGFP) expression in arteries treated with film-coated balloons. β-galactosidase and EGFP expression were observed throughout the medial layers of arterial tissue, and around approximately two-thirds of the circumference of the treated arteries. The layer-by-layer approach reported here provides a general platform for the balloon-mediated delivery of DNA to vascular tissue. Our results suggest the potential of this approach to deliver therapeutically relevant DNA to prevent complications such as intimal hyperplasia that arise after vascular interventions. PMID:20933275

  19. Does water-perfused catheter overdiagnose anismus compared to balloon probe?

    PubMed

    Savoye, G; Leroi, A M; Bertot-Sassigneux, P; Touchais, J Y; Devroede, G; Denis, P

    2002-12-01

    The purpose of this study was to compare the manometric assessment of straining effort as if to defecate and rectoanal inhibitory reflex obtained with a rectosphincteric balloon probe and with a water-perfused catheter in the same subject. Twelve healthy volunteers underwent two manometric assessments of anal sphincter function and electromyographic (EMG) surface recordings. one with a rectosphincteric balloon and one with a water-perfused catheter, 7 days apart in random order. Increased EMG activity in the external anal sphincter in the midst of the rectoanal inhibitory reflex (P < 0.001) and during straining for defecation (P < 0.001) was more frequently observed with the perfused system than with the balloon probe. There was a discrepancy between the EMG activity of the external anal sphincter and the anal pressures during straining recorded with the perfused system. Duration of the reflex elicited by rectal distension with 10 and 20 ml of air was significantly greater with the rectosphincteric balloon than with the perfused catheter (P = 0.02 and P = 0.05, respectively). Water instilled in the anal canal by the perfused system induces artifacts in EMG recording and active anal contractions. These artifacts and induced contractions could lead to an erroneous diagnosis of anismus, particularly if pelvic floor EMG is only taken into account for the diagnosis of anismus.

  20. Liquid- and air-filled catheters without balloon as an alternative to the air-filled balloon catheter for measurement of esophageal pressure.

    PubMed

    Beda, Alessandro; Güldner, Andreas; Carvalho, Alysson R; Zin, Walter Araujo; Carvalho, Nadja C; Huhle, Robert; Giannella-Neto, Antonio; Koch, Thea; de Abreu, Marcelo Gama

    2014-01-01

    Measuring esophageal pressure (Pes) using an air-filled balloon catheter (BC) is the common approach to estimate pleural pressure and related parameters. However, Pes is not routinely measured in mechanically ventilated patients, partly due to technical and practical limitations and difficulties. This study aimed at comparing the conventional BC with two alternative methods for Pes measurement, liquid-filled and air-filled catheters without balloon (LFC and AFC), during mechanical ventilation with and without spontaneous breathing activity. Seven female juvenile pigs (32-42 kg) were anesthetized, orotracheally intubated, and a bundle of an AFC, LFC, and BC was inserted in the esophagus. Controlled and assisted mechanical ventilation were applied with positive end-expiratory pressures of 5 and 15 cmH2O, and driving pressures of 10 and 20 cmH2O, in supine and lateral decubitus. Cardiogenic noise in BC tracings was much larger (up to 25% of total power of Pes signal) than in AFC and LFC (<3%). Lung and chest wall elastance, pressure-time product, inspiratory work of breathing, inspiratory change and end-expiratory value of transpulmonary pressure were estimated. The three catheters allowed detecting similar changes in these parameters between different ventilation settings. However, a non-negligible and significant bias between estimates from BC and those from AFC and LFC was observed in several instances. In anesthetized and mechanically ventilated pigs, the three catheters are equivalent when the aim is to detect changes in Pes and related parameters between different conditions, but possibly not when the absolute value of the estimated parameters is of paramount importance. Due to a better signal-to-noise ratio, and considering its practical advantages in terms of easier calibration and simpler acquisition setup, LFC may prove interesting for clinical use.

  1. Liquid- and Air-Filled Catheters without Balloon as an Alternative to the Air-Filled Balloon Catheter for Measurement of Esophageal Pressure

    PubMed Central

    Carvalho, Alysson R.; Zin, Walter Araujo; Carvalho, Nadja C.; Huhle, Robert; Giannella-Neto, Antonio; Koch, Thea; de Abreu, Marcelo Gama

    2014-01-01

    Background Measuring esophageal pressure (Pes) using an air-filled balloon catheter (BC) is the common approach to estimate pleural pressure and related parameters. However, Pes is not routinely measured in mechanically ventilated patients, partly due to technical and practical limitations and difficulties. This study aimed at comparing the conventional BC with two alternative methods for Pes measurement, liquid-filled and air-filled catheters without balloon (LFC and AFC), during mechanical ventilation with and without spontaneous breathing activity. Seven female juvenile pigs (32–42 kg) were anesthetized, orotracheally intubated, and a bundle of an AFC, LFC, and BC was inserted in the esophagus. Controlled and assisted mechanical ventilation were applied with positive end-expiratory pressures of 5 and 15 cmH2O, and driving pressures of 10 and 20 cmH2O, in supine and lateral decubitus. Main Results Cardiogenic noise in BC tracings was much larger (up to 25% of total power of Pes signal) than in AFC and LFC (<3%). Lung and chest wall elastance, pressure-time product, inspiratory work of breathing, inspiratory change and end-expiratory value of transpulmonary pressure were estimated. The three catheters allowed detecting similar changes in these parameters between different ventilation settings. However, a non-negligible and significant bias between estimates from BC and those from AFC and LFC was observed in several instances. Conclusions In anesthetized and mechanically ventilated pigs, the three catheters are equivalent when the aim is to detect changes in Pes and related parameters between different conditions, but possibly not when the absolute value of the estimated parameters is of paramount importance. Due to a better signal-to-noise ratio, and considering its practical advantages in terms of easier calibration and simpler acquisition setup, LFC may prove interesting for clinical use. PMID:25247308

  2. Balloon dilation and intralesional steroid for benign rectal stricture management in a cat.

    PubMed

    Chavkin, Jessica A; Spector, Donna J; Stanley, Skye W

    2010-08-01

    A 4-year-old castrated male domestic shorthair presented for 1 week of constipation and tenesmus. A rectal stricture had been diagnosed 8 months prior at the time of adoption and the cat had been successfully managed with stool softeners until presentation. A complete diagnostic work-up failed to reveal an underlying etiology for the stricture and colonoscopy was performed. Endoscopic biopsies of the stricture revealed benign non-specific inflammatory changes. Balloon dilation of the rectal stricture was performed during the initial colonoscopy and 3 and 9 days later. Triamcinolone acetonide was injected into the stricture site with endoscopic guidance during the third dilation procedure. The patient has been monitored for over 27 months; follow-up indicates no signs of tenesmus and repeated rectal examinations reveal no stricture recurrence. This case report demonstrates that endoscopic balloon dilation with intralesional steroid injection represented a minimally invasive and effective option for the treatment of a benign rectal stricture in this cat, and deserves further prospective investigation. Copyright 2010 ISFM and AAFP. Published by Elsevier Ltd. All rights reserved.

  3. Improved mortality from penetrating neck and maxillofacial trauma using Foley catheter balloon tamponade in combat.

    PubMed

    Weppner, Justin

    2013-08-01

    The military medical community has promoted use of Foley catheter balloon tamponade in the initial management of vascular injury owing to neck or maxillofacial trauma. The aim of the study was to compare outcomes with Foley catheter tamponade with those obtained with traditional use of external pressure. This retrospective cohort study evaluated all cases of persistent bleeding caused by penetrating neck or maxillofacial trauma received at one forward aid station between December 2009 and October 2011. Cohorts included those who were treated with Foley catheter tamponade and those managed with external pressure. Which treatment option was applied depended solely on the availability of Foley catheters at the time. The effectiveness of each technique in controlling initial and delayed hemorrhage is described, and the impact on mortality is analyzed using the Student's t test and Fisher's exact test. Seventy-seven subjects met the inclusion criteria with 42 subjects in the Foley group and 35 subjects in the external pressure group. A statistically significant difference was found between the groups regarding delayed failure, experienced by three patients (7%) in the Foley group and nine patients (26%) in the external pressure group (p < 0.05). The difference in mortality, 5% (two patients) in the Foley tamponade group and 23% (eight patients) in the external pressure group, was statistically significant (p < 0.05). For penetrating neck and maxillofacial injuries in a combat environment, Foley catheter balloon tamponade significantly reduced mortality when compared with direct pressure techniques through its effect on preventing delayed bleeding.

  4. Balloon augmented Onyx embolization utilizing a dual lumen balloon catheter: utility in the treatment of a variety of head and neck lesions.

    PubMed

    Spiotta, Alejandro M; Miranpuri, Amrendra S; Vargas, Jan; Magarick, Jordan; Turner, Raymond D; Turk, Aquilla S; Chaudry, M Imran

    2014-09-01

    Endovascular embolization for tumors and vascular malformations has emerged as an important preoperative adjunct prior to resection. We describe the advantages of utilizing a recently released dual lumen balloon catheter for ethylene vinyl alcohol copolymer, also known as Onyx (ev3, Irvine, California, USA), embolization for a variety of head and neck pathologies. A retrospective review of all cases utilizing the Scepter C balloon catheter (MicroVention Inc, Tustin, California, USA) for use in balloon augmented embolization was performed over a 4 month period from October 2012 to February 2013 at the Medical University of South Carolina, Charleston, South Carolina, USA. Charts and angiographic images were reviewed. Representative cases involving diverse pathologies are summarized and illustrate the observed advantages of balloon augmented Onyx embolization with a dual lumen balloon catheter. Balloon augmented Onyx embolization utilizing a novel dual lumen balloon catheter was employed to treat both ruptured and unruptured arteriovenous malformations, intracranial dural arteriovenous fistulae, intracranial neoplasms, carotid body tumors, a thyroid mass, and an extracranial arteriovenous fistula. The dual lumen balloon catheter has several advantages for use with Onyx embolization over older devices, including more efficient proximal plug formation and enhanced navigability for placement deep within the pedicles. The balloon augmented Onyx embolization technique represents a valuable tool to add to the armamentarium of the neurointerventionalist to address a variety of head and neck lesions. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  5. Attitudes on and usage of balloon catheter technology in rhinology: A survey of the American Rhinologic Society.

    PubMed

    Halderman, Ashleigh A; Stokken, Janalee; Momin, Suhael R; Smith, Timothy L; Sindwani, Raj

    2015-01-01

    Use of balloon catheter dilation in the management of paranasal sinus diseases, including chronic rhinosinusitis (CRS) and recurrent acute rhinosinusitis, remains controversial. In an effort to gain some clarity about its evolving role, we surveyed members of the American Rhinologic Society (ARS). Online survey. ARS Members were sent an invitation by e-mail to participate in an online, anonymous 23-item survey. A total of 231 participants completed the survey, for an overall response rate of 25%. Balloon catheter technology (BCT) played no role in the practices of one-third of all the respondents. Of those who did use BCT, more than 50% performed only 1-4 cases per month on average. This did not differ significantly with practice type (p = 0.2988). The overall use of BCT differed between types of practices with those in private practice reporting greater use of the technology for maxillary and sphenoid sinuses (p = 0.0003 and p = 0.0073, respectively). Participants in private practice appeared significantly more impressed with the results of BCT when compared with those in academia (p = 0.0005) and also thought that patients were more satisfied (p = 0.0002). Opinions toward the strength of available evidence also differed significantly between the two groups (p = 0.0007). Thirty-two respondents had experienced a complication with BCT, although the majority of these did not require any intervention. ARS members surveyed used BCT infrequently in their practices. Attitudes on the role of this technology in CRS management differed between academic and private practitioners, but, despite this, the volume of reported BCT use was the same. Surgeons are more accepting of the technology now compared with 5 years ago, and many of them believe that their use of BCT will increase in the future.

  6. Materials for multifunctional balloon catheters with capabilities in cardiac electrophysiological mapping and ablation therapy

    NASA Astrophysics Data System (ADS)

    Kim, Dae-Hyeong; Lu, Nanshu; Ghaffari, Roozbeh; Kim, Yun-Soung; Lee, Stephen P.; Xu, Lizhi; Wu, Jian; Kim, Rak-Hwan; Song, Jizhou; Liu, Zhuangjian; Viventi, Jonathan; de Graff, Bassel; Elolampi, Brian; Mansour, Moussa; Slepian, Marvin J.; Hwang, Sukwon; Moss, Joshua D.; Won, Sang-Min; Huang, Younggang; Litt, Brian; Rogers, John A.

    2011-04-01

    Developing advanced surgical tools for minimally invasive procedures represents an activity of central importance to improving human health. A key challenge is in establishing biocompatible interfaces between the classes of semiconductor device and sensor technologies that might be most useful in this context and the soft, curvilinear surfaces of the body. This paper describes a solution based on materials that integrate directly with the thin elastic membranes of otherwise conventional balloon catheters, to provide diverse, multimodal functionality suitable for clinical use. As examples, we present sensors for measuring temperature, flow, tactile, optical and electrophysiological data, together with radiofrequency electrodes for controlled, local ablation of tissue. Use of such ‘instrumented’ balloon catheters in live animal models illustrates their operation, as well as their specific utility in cardiac ablation therapy. The same concepts can be applied to other substrates of interest, such as surgical gloves.

  7. Arterioureteral Fistula: Treatment of a Hemorrhagic Shock with Massive Hematuria by Placing a Balloon Catheter.

    PubMed

    Merzeau, Nicolas; Riquet, Hervé; Nicolacopoulos, Ioannis; Alame, Abbas; Larré, Stéphane

    2017-01-01

    Arterioureteral fistulas (AUF) are serious diseases with increasing incidence. This case report relates the management of AUF in a patient with a history of abdominal oncological surgery, pelvic radiotherapy, and a double J stent in place. The fistula was discovered during a hemorrhagic shock with massive hematuria. The bleeding was controlled by a balloon catheter which led to endovascular treatment consisting of a covered stent.

  8. Prophylactic use of intravascular balloon catheters in women with placenta accreta, increta and percreta.

    PubMed

    Cali, Giuseppe; Forlani, Francesco; Giambanco, Laura; Amico, Maria Luisa; Vallone, Mario; Puccio, Giuseppe; Alio, Luigi

    2014-08-01

    To evaluate outcomes of women undergoing cesarean hysterectomy for abnormal invasive placenta (AIP) with and without preoperative balloon catheter placement in internal iliac arteries. A prospective observational study of women with ultrasound diagnosis of AIP and a planned delivery at our institution. From January 2004 to June 2009, all AIP cases were treated with planned multidisciplinary cesarean hysterectomy alone (CHa group). From July 2009 to September 2013 a pre-operative balloon catheter protocol was introduced (BC group). Statistical analysis considered the entire sample (placenta accreta/increta and percreta) and the individual subgroups (accreta/increta vs percreta). Twenty-three cases of AIP (10 accreta/increta and 13 percreta) were treated with cesarean hysterectomy alone, and 30 cases of AIP (12 accreta/increta and 18 percreta) were treated with cesarean hysterectomy and pre-operative balloon catheters. For the entire sample, a significant difference in estimated blood loss and transfused blood products units was observed between CHa group and BC group. When women with placenta accreta/increta and women with placenta percreta were analysed separately, no difference in estimated blood loss and transfused blood products units was found between the BC and the CHa groups in women with placenta accreta/increta. However, in women with placenta percreta, mean estimated blood loss and transfused blood products units were higher in the CHa group compared with BC group (1507ml vs 933.33ml; 3.31 units vs 0.67 units). Postoperative recovery differed between the two groups, but no differences were observed in any other outcomes. Pre-operative placement of intravascular balloon catheters is a feasible treatment for AIP, and is particularly useful in cases of placenta percreta. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  9. Arterioureteral Fistula: Treatment of a Hemorrhagic Shock with Massive Hematuria by Placing a Balloon Catheter

    PubMed Central

    Riquet, Hervé; Nicolacopoulos, Ioannis; Alame, Abbas

    2017-01-01

    Arterioureteral fistulas (AUF) are serious diseases with increasing incidence. This case report relates the management of AUF in a patient with a history of abdominal oncological surgery, pelvic radiotherapy, and a double J stent in place. The fistula was discovered during a hemorrhagic shock with massive hematuria. The bleeding was controlled by a balloon catheter which led to endovascular treatment consisting of a covered stent. PMID:28465857

  10. [Mitral valvuloplasty with double balloon catheter. Analysis of 200 cases].

    PubMed

    Gomes, N L; Esteves, C A; Braga, S L; Ramos, A I; Meneghelo, Z M; Mattos, L A; Pontes Júnior, S C; Arnoni, A S; Fontes, V F; Sousa, J E

    1992-04-01

    To study the immediate clinical, echocardiographic and hemodynamic results of 200 patients who underwent percutaneous mitral balloon valvotomy (PMV) with double balloon technique. Two hundred patients were submitted to PVM for treatment of congestive heart failure secondary to severe mitral stenosis, between August 1987 to July 1991. Their mean age was 35.2 years, and 86.5% were female patients: 81% of them was in functional class, New York Heart Association (NYHA) III or IV; 4% was in atrial fibrilation and 4% had previous surgical commissurotomy. PMV was successfully performed in 89% of the patients. The mitral valve area, by pressure half time method, increased from 0.91 +/- 0.27 to 2.10 +/- 0.47 cm2, p < 0.001; the mean mitral gradient decreased from 20.86 +/- 6.16 to 4.26 +/- 3.13 mmHg, p < 0.001; the left atrium and mean pulmonary artery pressure decreased from 22.3 +/- 7.1 to 11.9 +/- 8.3 and 36.47 +/- 12.93 to 24.56 +/- 9.98 mmHg, p < 0.001, respectively. Complications related to transeptal technique occurred in 12 patients, which resulted in cardiac tamponade in 5 and death in 1. In 19 patients the punction of the atrial septum could not be performed. Mitral regurgitation (MR) immediately after PMV appeared 1+ or more grade in 50 patients, increased in 8 patients and remained unchanged in 11 patients. Ten patients needed mitral valve replacement in the first 48h after PMV, for treatment of severe MR. PMV produces excellent immediate results and can be considered an alternative to surgery for the relief of mitral stenosis.

  11. Treatment of benign esophageal stricture by Eder-Puestow or balloon dilators: a comparison between randomized and prospective nonrandomized trials.

    PubMed

    Yamamoto, H; Hughes, R W; Schroeder, K W; Viggiano, T R; DiMagno, E P

    1992-03-01

    To determine whether the natural history of strictures is affected by the type of dilator used to treat newly diagnosed peptic strictures, we designed a prospective randomized trial to compare the results after Eder-Puestow or Medi-Tech balloon dilation. We entered 31 patients into the trial. We also prospectively followed up all 92 nonrandomized patients who underwent their first dilation for a benign stricture during the same period as the prospective randomized trial. The nonrandomized patients also underwent dilation with either the Eder-Puestow or the balloon technique at the discretion of the gastroenterologist performing the endoscopy. We found no statistically significant differences in the immediate or long-term results of the two methods among the randomized, nonrandomized, and overall combined groups. All but 1 of the 123 patients had immediate relief of dysphagia. Within each group of patients, the probability of remaining free of dysphagia 1 year after the initial dilation was approximately 20%, and the probability of not requiring a second dilation was approximately 65% with either technique. Major (esophageal rupture) and minor (bleeding or chest pain) complications occurred in 1% and 5% of the patients and 0.4% and 3% of the total dilation procedures, respectively. The esophageal rupture and four of six minor complications occurred after repeated dilations. Five of the six minor complications occurred with use of the Eder-Puestow dilators. We conclude that Eder-Puestow and balloon dilations of benign esophageal strictures are associated with similar outcomes, but repeated dilations and the Eder-Puestow technique may be associated with an increased risk of complications.

  12. Balloon dilatation of the Eustachian tube: postoperative validation of patient satisfaction.

    PubMed

    Bast, F; Frank, A; Schrom, T

    2013-01-01

    The Eustachian tube is responsible for ventilation, protection and drainage of the middle ear. Dysfunction of the Eustachian tube can lead to impairments ranging from inadequate pressure equalisation in the middle ear and pneumatised mastoid process to cholesteatoma. Conventional surgical interventions for chronic tube dysfunction have not brought resounding clinical success. However, the 'Bielefelder Balloon dilatation' constitutes a new and, judging from early results, very effective treatment for chronic tube dysfunction. Proof of the efficacy of the surgical procedures is provided by objective clinical factors, but for quality assurance, the assessment of the subjective quality of life of patients must also be taken into account. To measure health-related quality of life, standardised questionnaires are used which have been tested for reliability, validity and sensitivity. A total of 30 patients were included in the study. The patient survey was conducted retrospectively, and validation of patient satisfaction was carried out with the Glasgow Benefit Inventory (GBI). GBI analysis revealed significant improvements in the total score as well as in general and physical health. The Bielefelder Balloon dilatation is a new and safe treatment for chronic tube dysfunction, which had a significant positive influence on the postoperative quality of life of our patient cohort. © 2014 S. Karger AG, Basel.

  13. Endoscopic endonasal control of the paraclival internal carotid artery by Fogarty balloon catheter inflation: an anatomical study.

    PubMed

    Ruggeri, Andrea; Enseñat, Joaquim; Prats-Galino, Alberto; Lopez-Rueda, Antonio; Berenguer, Joan; Cappelletti, Martina; De Notaris, Matteo; d'Avella, Elena

    2017-03-01

    OBJECTIVE Neurosurgical management of many vascular and neoplastic lesions necessitates control of the internal carotid artery (ICA). The aim of this study was to investigate the feasibility of achieving control of the ICA through the endoscopic endonasal approach by temporary occlusion with a Fogarty balloon catheter. METHODS Ten endoscopic endonasal paraseptal approaches were performed on cadaveric specimens. A Fogarty balloon catheter was inserted through a sellar bony opening and pushed laterally and posteriorly extraarterially along the paraclival carotid artery. The balloon was then inflated, thus achieving temporary occlusion of the vessel. The position of the catheter was confirmed with CT scans, and occlusion of the ICA was demonstrated with angiography. The technique was performed in 2 surgical cases of pituitary macroadenoma with cavernous sinus invasion. RESULTS Positioning the Fogarty balloon catheter at the level of the paraclival ICA was achieved in all cadaveric dissections and surgical cases through a minimally invasive, quick, and safe approach. Inflation of the Fogarty balloon caused interruption of blood flow in 100% of cases. CONCLUSIONS Temporary occlusion of the paraclival ICA performed through the endoscopic endonasal route with the aid of a Fogarty balloon catheter may be another maneuver for dealing with intraoperative ICA control. Further clinical studies are required to prove the efficacy of this method.

  14. REcanalisation and Balloon-Oriented Puncture for Re-Insertion of Dialysis Catheter in Nonpatent Central Veins (REBORN)

    SciTech Connect

    Too, Chow Wei, E-mail: toochowwei@gmail.com; Sayani, Raza; Lim, Elvin Yuan Ting

    PurposeTo describe a technique involving REcanalisation and Balloon-Oriented puncture for Re-insertion of dialysis catheter in Nonpatent central veins (REBORN) and to report long-term results.Materials and MethodsThis is a retrospective study of ten subjects in whom dialysis catheters were inserted using the REBORN technique from March 2012 to October 2014 and followed up till April 2016. Data on the duration of catheter usage, complications and reasons for removal were obtained. Seven patients had partially occluded lower internal jugular veins (IJV) recanalised in an antegrade fashion via a more cranial puncture. The balloon was then inflated at usual puncture site with anmore » 18G needle. The collapsed balloon was cannulated with a guide wire, and both balloon and guide wire were advanced together into the superior vena cava. This was followed by tunnelled catheter placement using standard techniques. Two patients had catheters placed in the subclavian vein using a similar antegrade technique, and one patient had catheter placed via the left IJV following retrograde recanalisation from a right femoral puncture.ResultsMean duration of catheter use was 278 days (range 32–503). Three catheters were removed due to matured arteriovenous accesses. Four patients had successful catheter change over the same subcutaneous track due to catheter malfunction. One catheter was removed after 7 months because of sepsis. No complications were reported.ConclusionThe REBORN technique allows for the preservation of central veins for future haemodialysis access, which can be challenging in patients requiring long-term dialysis.« less

  15. Factors predictive of adverse events following endoscopic papillary large balloon dilation: results from a multicenter series.

    PubMed

    Park, Soo Jung; Kim, Jin Hong; Hwang, Jae Chul; Kim, Ho Gak; Lee, Don Haeng; Jeong, Seok; Cha, Sang-Woo; Cho, Young Deok; Kim, Hong Ja; Kim, Jong Hyeok; Moon, Jong Ho; Park, Sang-Heum; Itoi, Takao; Isayama, Hiroyuki; Kogure, Hirofumi; Lee, Se Joon; Jung, Kyo Tae; Lee, Hye Sun; Baron, Todd H; Lee, Dong Ki

    2013-04-01

    Lack of established guidelines for endoscopic papillary large balloon dilation (EPLBD) may be a reason for aversion of its use in removal of large common bile duct (CBD) stones. We sought to identify factors predictive of adverse events (AEs) following EPLBD. This multicenter retrospective study investigated 946 consecutive patients who underwent attempted removal of CBD stones ≥10 mm in size using EPLBD (balloon size 12-20 mm) with or without endoscopic sphincterotomy (EST) at 12 academic medical centers in Korea and Japan. Ninety-five (10.0 %) patients exhibited AEs including bleeding in 56, pancreatitis in 24, perforation in nine, and cholangitis in six; 90 (94.7 %) of these were classified as mild or moderate in severity. There were four deaths, three as a result of perforation and one due to delayed massive bleeding. Causative factors identified in fatal cases were full-EST and continued balloon inflation despite a persistent waist seen fluoroscopically. Multivariate analyses showed that cirrhosis (OR 8.03, p = 0.003), length of EST (full-EST: OR 6.22, p < 0.001) and stone size (≥16 mm: OR 4.00, p < 0.001) were associated with increased bleeding, and distal CBD stricture (OR 17.08, p < 0.001) was an independent predictor for perforation. On the other hand, balloon size was associated with deceased pancreatitis (≥14 mm: OR 0.27, p = 0.015). EPLBD appears to be a safe and effective therapeutic approach for retrieval of large stones in patients without distal CBD strictures and when performed without full-EST.

  16. Circumferential optical coherence tomography angiography imaging of the swine esophagus using a micromotor balloon catheter

    PubMed Central

    Lee, Hsiang-Chieh; Ahsen, Osman Oguz; Liang, Kaicheng; Wang, Zhao; Cleveland, Cody; Booth, Lucas; Potsaid, Benjamin; Jayaraman, Vijaysekhar; Cable, Alex E.; Mashimo, Hiroshi; Langer, Robert; Traverso, Giovanni; Fujimoto, James G.

    2016-01-01

    We demonstrate a micromotor balloon imaging catheter for ultrahigh speed endoscopic optical coherence tomography (OCT) which provides wide area, circumferential structural and angiographic imaging of the esophagus without contrast agents. Using a 1310 nm MEMS tunable wavelength swept VCSEL light source, the system has a 1.2 MHz A-scan rate and ~8.5 µm axial resolution in tissue. The micromotor balloon catheter enables circumferential imaging of the esophagus at 240 frames per second (fps) with a ~30 µm (FWHM) spot size. Volumetric imaging is achieved by proximal pullback of the micromotor assembly within the balloon at 1.5 mm/sec. Volumetric data consisting of 4200 circumferential images of 5,000 A-scans each over a 2.6 cm length, covering a ~13 cm2 area is acquired in <18 seconds. A non-rigid image registration algorithm is used to suppress motion artifacts from non-uniform rotational distortion (NURD), cardiac motion or respiration. En face OCT images at various depths can be generated. OCT angiography (OCTA) is computed using intensity decorrelation between sequential pairs of circumferential scans and enables three-dimensional visualization of vasculature. Wide area volumetric OCT and OCTA imaging of the swine esophagus in vivo is demonstrated. PMID:27570688

  17. Circumferential optical coherence tomography angiography imaging of the swine esophagus using a micromotor balloon catheter.

    PubMed

    Lee, Hsiang-Chieh; Ahsen, Osman Oguz; Liang, Kaicheng; Wang, Zhao; Cleveland, Cody; Booth, Lucas; Potsaid, Benjamin; Jayaraman, Vijaysekhar; Cable, Alex E; Mashimo, Hiroshi; Langer, Robert; Traverso, Giovanni; Fujimoto, James G

    2016-08-01

    We demonstrate a micromotor balloon imaging catheter for ultrahigh speed endoscopic optical coherence tomography (OCT) which provides wide area, circumferential structural and angiographic imaging of the esophagus without contrast agents. Using a 1310 nm MEMS tunable wavelength swept VCSEL light source, the system has a 1.2 MHz A-scan rate and ~8.5 µm axial resolution in tissue. The micromotor balloon catheter enables circumferential imaging of the esophagus at 240 frames per second (fps) with a ~30 µm (FWHM) spot size. Volumetric imaging is achieved by proximal pullback of the micromotor assembly within the balloon at 1.5 mm/sec. Volumetric data consisting of 4200 circumferential images of 5,000 A-scans each over a 2.6 cm length, covering a ~13 cm(2) area is acquired in <18 seconds. A non-rigid image registration algorithm is used to suppress motion artifacts from non-uniform rotational distortion (NURD), cardiac motion or respiration. En face OCT images at various depths can be generated. OCT angiography (OCTA) is computed using intensity decorrelation between sequential pairs of circumferential scans and enables three-dimensional visualization of vasculature. Wide area volumetric OCT and OCTA imaging of the swine esophagus in vivo is demonstrated.

  18. Intrauterine Inflated Foley's Catheter Balloon in the Management of Abnormally Invasive Placenta Previa: A Case-Control Study.

    PubMed

    Thabet, Mahmoud; Abdelhafez, Mohamed Sayed; Fyala, Emad Ahmed

    2018-06-01

    To describe the use of intrauterine inflated Foley's catheter balloon for control of postpartum hemorrhage (PPH) during cesarean section (CS) in cases of abnormally invasive placenta previa aiming to preserve the uterus. Retrospective case-control study of the data of women who underwent elective CS on abnormally adherent placenta previa was carried out. Women in whom inflated Foley's catheter balloon was used for control of PPH during CS ( n  = 40) were compared with a control group of women who underwent elective CS by the same technique but without use of intrauterine catheter balloon ( n  = 38). Use of intrauterine inflated Foley's catheter balloon significantly reduced the estimated amount of blood loss ( P  = 0.008), amounts of crystalloids, colloids and packed red blood cells transfusion ( P  = 0.025, 0.017 and 0.022, respectively), and the need for bilateral internal iliac artery (IIA) ligation ( P  = 0.016). No significant difference was observed between both groups regarding the use of massive transfusion protocol, performing cesarean hysterectomy, relaparotomy, and admission to the intensive care unit. Application of an intrauterine inflated Foley's catheter balloon during CS in cases of morbidly adherent placenta previa helps to control PPH with preservation of the uterus and decreases the need for the invasive IIA ligation.

  19. Treatment of multiple-level tracheobronchial stenosis secondary to endobronchial tuberculosis using bronchoscopic balloon dilatation with topical mitomycin-C.

    PubMed

    Faisal, Mohamed; Harun, Hafaruzi; Hassan, Tidi M; Ban, Andrea Y L; Chotirmall, Sanjay H; Abdul Rahaman, Jamalul Azizi

    2016-04-14

    Tracheobronchial stenosis is a known complication of endobronchial tuberculosis. Despite antituberculous and steroid therapy, the development of bronchial stenosis is usually irreversible and requires airway patency to be restored by either bronchoscopic or surgical interventions. We report the use of balloon dilatation and topical mitomycin-C to successful restore airway patency. We present a 24-year old lady with previous pulmonary tuberculosis and laryngeal tuberculosis in 2007 and 2013 respectively who presented with worsening dyspnoea and stridor. She had total left lung collapse with stenosis of both the upper trachea and left main bronchus. She underwent successful bronchoscopic balloon and manual rigid tube dilatation with topical mitomycin-C application over the stenotic tracheal segment. A second bronchoscopic intervention was performed after 20 weeks for the left main bronchus stenosis with serial balloon dilatation and topical mitomycin-C application. These interventions led to significant clinical and radiographic improvements. This case highlights that balloon dilatation and topical mitomycin-C application should be considered in selected patients with tracheobronchial stenosis following endobronchial tuberculosis, avoiding airway stenting and invasive surgical intervention.

  20. Long term impact of balloon post-dilatation on neointimal formation: an experimental comparative study between second-generation self-expanding versus balloon-expandable stent technologies.

    PubMed

    Aboodi, Michael S; Milewski, Krzysztof; Tellez, Armando; Cheng, Yanping; Yi, Geng-Hua; Kaluza, Greg L; Granada, Juan F

    2014-02-15

    Background: Self-expanding stents (SES) are reemerging as therapeutic alternatives to treat coronary artery disease. It has been proposed that SES can improve clinical outcomes by inducing less injury at implantation and achieving better vessel wall apposition.To date, little data exists comparing the vascular response to both methods of deployment in a controlled experimental setting. Objective: To quantify differences in vascular injury and healing between second-generation SES and balloon-expandable stents (BES) and the effects of balloon post-dilatation in a porcine coronary model. Methods: Seventy-five bare SES (AXXESS or vProtect) and 42 BES (Vision) were implanted in porcine coronaries. A subset of these received balloon post-dilatation(SES 1 D 5 22, BES 1 D 5 20). Follow-up was scheduled at 30 (BES 5 10, BES 1 D 56, SES 5 19, SES 1 D 5 8), 90 (BES 5 6, BES 1 D 5 8, SES 5 19, SES 1 D 5 8), and 180 days (BES 5 6, BES 1 D 5 6, SES 5 15, SES 1 D 5 6). Results: In vivo imaging and histological analysis showed that neointimal formation peaks early (30 days) in BES. Conversely, for SES, the peak occurred later (90 days). However, the neointimal formation achieved in either group equalized at 180 days. For SES, post-dilatation shortened the peak of neointimal formation to 30 days. Conversely, for BES, post-dilatation delayed the peak of neointimal formation to 90 days. At 30 days, histology showed that SES had significantly less injury. However, at 90 days, injury scores tended to be higher for SES. By 180 days, injury scores were comparable between both groups. Conclusions: The mechanism of stent expansion influences the degree of vascular injury and healing. The synergistic use of balloon post dilatation changes the dynamics of healing and may impact the potential beneficial effects inherent to SES technologies.

  1. The quest for durable lesions in catheter ablation of atrial fibrillation - technological advances in radiofrequency catheters and balloon devices.

    PubMed

    Maurer, Tilman; Kuck, Karl-Heinz

    2017-08-01

    Atrial fibrillation is the most common cardiac arrhythmia and represents a growing clinical, social and economic challenge. Catheter ablation for symptomatic atrial fibrillation has evolved from an experimental procedure into a widespread therapy and offers a safe and effective treatment option. A prerequisite for durable PVI are transmural and contiguous circumferential lesions around the pulmonary veins. However, electrical reconnection of initially isolated pulmonary veins remains a primary concern and is a dominant factor for arrhythmia recurrence during long-term follow up. Areas covered: This article discusses the physiology of lesion formation using radiofrequency-, cryo- or laser- energy for pulmonary vein isolation and provides a detailed review of recent technological advancements in the field of radiofrequency catheters and balloon devices. Finally, future directions and upcoming developments for the interventional treatment of atrial fibrillation are discussed. Expert commentary: Durable conduction block across deployed myocardial lesions is mandatory not only for PVI but for any other cardiac ablation strategy as well. A major improvement urgently expected is the intraprocedural real-time distinction of durable lesions from interposed gaps with only transiently impaired electrical conduction. Furthermore, a simplification of ablation tools used for PVI is required to reduce the high technical complexity of the procedure.

  2. A fragment of Foley catheter balloon as a cause of Bladder stone in woman

    PubMed Central

    Aziz, El Majdoub; Amrani, Mouad; Abdelhak, Khallouk; Hassan, Farih Moulay

    2015-01-01

    Urinary bladder calculi are rarely seen in women and any history of previous pelvic surgery must, therefore, raise suspicion of an iatrogenic etiology. According to the literature, fewer than 2% of all bladder calculi occur in female subjects and, thus, their presence should provoke careful assessment of the etiology. We report one case of a fragment of Foley catheter balloon as a cause of Bladder stone in 28 years old woman. Weanalyzed the diagnosis, aspect and therapeutic management of this case which is the first described in literature to our knowledge. PMID:26587134

  3. The Crataegus extract WS 1442 inhibits balloon catheter-induced intimal hyperplasia in the rat carotid artery by directly influencing PDGFR-beta.

    PubMed

    Fürst, Robert; Zirrgiebel, Ute; Totzke, Frank; Zahler, Stefan; Vollmar, Angelika M; Koch, Egon

    2010-08-01

    Effective systemic drugs against restenosis upon percutaneous transluminal coronary angioplasty (PTCA) are largely lacking. Polyphenols have been suggested to ameliorate post-angioplasty restenosis. Hawthorn (Crataegus spp.) extracts, which are among the most frequently used herbal medicinal products against mild forms of congestive heart failure, contain polyphenols, but have not been investigated in this context. We aimed to assess the potential of the hawthorn extract WS 1442 to prevent balloon catheter-induced intimal hyperplasia and to elucidate the underlying mechanisms. We analyzed the effects of WS 1442 on serum-induced vascular smooth muscle cell (VSMC) and endothelial cell (EC) growth and migration, growth factor-induced proliferation, growth factor receptor activity, and neointima formation in the rat carotid artery model. WS 1442 (100 microg/ml) decreased VSMC migration by 38% and proliferation by 44%, whereas EC migration and proliferation were unaltered. The extract inhibited VSMC DNA synthesis induced by platelet-derived growth factor (PDGF) (IC(50): 47 microg/ml), but not that of basic fibroblast growth factor (bFGF) and epidermal growth factor (EGF). Along this line, WS 1442 blocked recombinant human PDGF receptor (PDGFR)-beta kinase activity (IC(50): 1.4 microg/ml) and decreased PDGFR-beta activation and extracellular signal-regulated kinase (ERK) activation in VSMCs. In rats, orally administered WS 1442 significantly reduced neointima formation after balloon catheter dilatation of the carotid artery. WS 1442 inhibits migration and proliferation of VSMCs, but not of ECs, and reduces balloon catheter-evoked neointima formation probably through inhibition of PDGFR-beta. Thus, the present study suggests a novel adjunct pharmacological strategy to prevent angioplasty-related restenosis. Copyright 2010 Elsevier Ireland Ltd. All rights reserved.

  4. [Laparoscopic Heller myotomy after failed POEM and multiple balloon dilatations : Better late than never].

    PubMed

    Giulini, L; Dubecz, A; Stein, H J

    2017-04-01

    Despite the lack of long-term results, peroral endoscopic myotomy (POEM) has been increasingly propagated as a feasible alternative to pneumatic balloon dilatation (BD) and laparoscopic Heller myotomy (LHM) in patients with achalasia. After a long-term follow-up, a large percentage of patients reported recurrence of dysphagia. It is unclear which kind of procedure (redo POEM or LHM) should be utilized in these patients with failed POEM. We report the case of a 37-year-old female patient with type I achalasia who was successfully treated with LHM after a failed POEM procedure. After the manometric diagnosis of type I achalasia, the patient was treated with six balloon dilatations within a period of 5 months. Because of the persistence of symptoms a POEM procedure was performed with no relief and the patient was referred for surgical treatment. An esophagography showed a pronounced widening of the middle and the distal esophagus with a persistent narrowing of the lower esophageal sphincter (LES) and because of these indications LHM was performed. The intraoperative examination revealed extensive scarring of the submucosal layer with the muscularis mucosae of the distal esophagus; nevertheless, it was possible to carry out a 5 cm long cardiomyotomy without mucosal injury. The operation was completed with a Dor fundoplication. There were no postoperative complications. After surgery the patient reported an immediate and complete relief of dysphagia. The published experiences with POEM seem to show promising short-term results in terms of dysphagia relief; however, the few available mid-term analyses demonstrated no essential advantages when compared to LHM; therefore, the LHM must still be considered the gold standard procedure for definitive treatment of achalasia. According to our case report, LHM was shown to be a safe and effective although laborious treatment option due to scarring even after failed treatment by POEM.

  5. Analysis of chemosensory function in patients with chronic Eustachian tube dysfunction prior to and after balloon dilatation.

    PubMed

    Ute, Walliczek-Dworschak; Lisa, Schmierer; Brandon, Greene; Robert, Pellegrino; Philipp, Dworschak; Stuck, Boris Alexander; Christian, Güldner

    2018-10-01

    Eustachian tube dysfunction (ETD) affects approximately 1% of adults in the general population. Non treated Eustachian tube dysfunction can result in chronic middle ear diseases, which have been shown to significantly affect taste sensitivity. A promising treatment is balloon dilatation of the Eustachian tube. The primary aim of the present study was to investigate whether individuals with ETD had impairment in chemosensory functions, and the changes of the chemosensory function after balloon dilatation of the Eustachian tube. 26 patients (17 female, 9 male) (=56 ears) suffering from ETD with a mean age of 39±15years were included in the present study. 20 patients (76%) returned to be evaluated at the follow up (=40 ears) 51±22days after balloon dilatation. For pre- and post operation, gustatory function was measured with a lateralized gustatory test with the taste strips and olfactory function was tested by means of the Sniffin' Sticks test battery (threshold, discrimination and identification (ID)). Patients' baseline taste function (summed taste score 9.8±3.5 (mean±SD)) was significantly impaired compared to normative data (summed taste score 12.4±2.3; p=0.002). After balloon dilatation of the Eustachian tube, the taste function remained stable (summed taste score 9.4±4.3; p=0.814). Olfactory function (odor ID, summed score (TDI)) improved postoperatively (TDI 32.4±3.6) compared to pre-operative scores (TDI 33.6±4.0; p=0.012), but not to a clinically relevant extent. This study suggests, that patients suffering from ETD exhibit reduced taste scores. Balloon dilatation of the Eustachian tube does not seem to influence gustatory function, but olfactory function showed improvement. Copyright © 2018 Elsevier B.V. All rights reserved.

  6. Aortic occlusion balloon catheter technique is useful for uncontrollable massive intraabdominal bleeding after hepato-pancreato-biliary surgery.

    PubMed

    Miura, Fumihiko; Takada, Tadahiro; Ochiai, Takenori; Asano, Takehide; Kenmochi, Takashi; Amano, Hodaka; Yoshida, Masahiro

    2006-04-01

    Massive intraabdominal hemorrhage sometimes requires urgent hemostatic surgical intervention. In such cases, its rapid stabilization is crucial to reestablish a general hemodynamic status. We used an aortic occlusion balloon catheter in patients with massive intraabdominal hemorrhage occurring after hepato-pancreato-biliary surgery. An 8-French balloon catheter was percutaneously inserted into the aorta from the femoral artery, and the balloon was placed just above the celiac artery. Fifteen minutes inflation and 5 minutes deflation were alternated during surgery until the bleeding was surgically controlled. An aortic occlusion balloon catheter was inserted on 13 occasions in 10 patients undergoing laparotomy for hemostasis of massive hemorrhage. The aorta was successfully occluded on 12 occasions in nine patients. Both systolic pressure and heart rate were normalized during aortic occlusion, and the operative field became clearly visible after adequate suction of leaked blood. Bleeding sites were then easily found and controlled. Hemorrhage was successfully controlled in 7 of 10 patients (70%), and they were discharged in good condition. The aortic occlusion balloon catheter technique was effective for easily controlling massive intraabdominal bleeding by hemostatic procedure after hepato-pancreato-biliary surgery.

  7. Arteriography of the left internal mammary artery graft utilizing a balloon-tipped floatation catheter: an alternative approach.

    PubMed

    Sharifi, M; Lauer, J; Pompili, V J; Dillon, J C

    1999-11-01

    In this report, we describe an alternative method to the conventional arteriographic techniques of the left internal mammary artery (LIMA) graft using a balloon-tipped floatation catheter placed within the left subclavian artery. The floatation catheter will serve as both an occluder of the subclavian artery as well as a port for contrast injection. It may be effectively employed in the rare instances where direct cannulation of the LIMA graft is not possible.

  8. Comparative study of balloon and metal olive dilators for endoscopic management of benign anastomotic rectal strictures: clinical and cost-effectiveness outcomes.

    PubMed

    Xinopoulos, Dimitrios; Kypreos, Dimitrios; Bassioukas, Stefanos P; Korkolis, Dimitrios; Mavridis, Konstantinos; Scorilas, Andreas; Dimitroulopoulos, Dimitrios; Loukou, Argyro; Paraskevas, Emmanouel

    2011-03-01

    Postoperative anastomotic strictures frequently complicate colorectal resection. Currently, various endoscopic techniques are being employed in their management, but the establishment of an optimal therapeutic strategy is still pending. The purpose of our study is to compare through-the-scope (TTS) balloon dilators versus Eder-Puestow metal olive dilators in the treatment of postoperative benign rectal strictures, considering the clinical outcome and cost-effectiveness of each method. A total of 39 patients with benign anastomotic rectal stenosis were retrospectively studied. In group A, 15 patients underwent dilation with Eder-Puestow metal olives, while in group B 19 patients were treated by means of TTS balloon dilators. The technical and clinical success of dilation, complications, number of repeated sessions required, disease-free time intervals, and the overall cost of each procedure were evaluated. Dilations were technically successful in all patients. No major complications occurred in either group. The number of dilations needed, rate of stricture recurrence, and duration of stenosis-free time intervals were not statistically significantly different between the two groups. Both methods proved more effective in older patients, given the greater number of dilations required in younger patients of both groups and higher frequency of stricture relapse in younger balloon-dilated patients (median 64.00 years) compared with older ones (median 75.00 years) (p = 0.001). An indisputable advantage of the Eder-Puestow technique, compared with TTS balloon dilators, is the low cost of equipment (median 22.30 compared with 680 , respectively; p < 0.001). Endoscopic dilation of postoperative benign rectal strictures is equally effective and safe, especially in older patients, when performed by Eder-Puestow bougies or TTS balloon dilators. However, metal olivary tips seem to surpass balloon dilators when considering the obvious economical benefits of the

  9. [Application of injection test in confirming the ideal position of esophageal balloon catheter].

    PubMed

    Chen, Han; Xu, Ming; Yang, Yanlin; He, Xuan; Zhou, Jianxin

    2017-09-01

    To evaluate the safety and feasibility of injection test which is used to locate esophageal balloon catheter. A prospective study was conducted. The patients undergoing invasive mechanical ventilation (MV) admitted to general intensive care unit (ICU) of Beijing Tiantan Hospital Affiliated to Capital Medical University from May 2015 and March 2017 were enrolled. The commercially available esophageal balloon catheter was modified to perform injection test. The catheter was withdrawn step by step and the injection test was repeated until the presence disturbance wave presented, which indicated that the balloon had just entered the esophagus. The position where disturbance wave appears was named 0 cm. End-expiratory occlusions were performed at the positions of +15, +10, +5, 0, -5, -10 and -15 cm, respectively, and the changes of esophageal pressure (Pes) and airway pressures (Paw) were measured in the spontaneous breathing and passive ventilation, and the ratio between the changes (ΔPes/ΔPaw) was calculated. A total of 20 patients were enrolled, of which 15 patients finished both the spontaneous and the passive ventilation parts, and 2 patients finished only the spontaneous part and 3 patients finished only passive part. (1) Disturbance waves could be induced by injection test in all patients. The average depth of disturbance wave in spontaneous breathing was deeper than that in passive ventilation (cm: 42.4±3.8 vs. 41.8±3.3), but there was no significant difference between the two ventilation settings (P = 0.132). No adverse events occurred during the study period. (2) Pes increased with the stepwise withdraw of esophageal catheter, reached the maximal value at +5 cm, and then decreased when the catheter was further withdrawn, no matter in the spontaneous or the passive ventilation. In spontaneous breathing, the ΔPes/ΔPaw was within the ideal range (0.8-1.2) at the positions of 0, -5 and -10 cm. The ΔPes/ΔPaw was closest to unity at the positions of 0 cm (0

  10. Modeling intracavitary heating of the uterus by means of a balloon catheter

    NASA Astrophysics Data System (ADS)

    Olsrud, Johan; Friberg, Britt; Rioseco, Juan; Ahlgren, Mats; Persson, Bertil R. R.

    1999-01-01

    Balloon thermal endometrial destruction (TED) is a recently developed method to treat heavy menstrual bleeding (menorrhagia). Numerical simulations of this treatment by use of the finite element method were performed. The mechanical deformation and the resulting stress distribution when a balloon catheter is expanded within the uterine cavity was estimated from structural analysis. Thermal analysis was then performed to estimate the depth of tissue coagulation (temperature > 55 degree(s)C) in the uterus during TED. The estimated depth of coagulation, after 30 min heating with an intracavity temperature of 75 degree(s)C, was approximately 9 mm when blood flow was disregarded. With uniform normal blood flow, the depth of coagulation decreased to 3 - 4 mm. Simulations with varying intracavity temperatures and blood flow rates showed that both parameters should be of major importance to the depth of coagulation. The influence of blood flow was less when the pressure due to the balloon was also considered (5 - 6 mm coagulation depth with normal blood flow).

  11. Balloon-Assisted Chemoembolization Using a Micro-Balloon Catheter Alongside a Microcatheter for a Hepatocellular Carcinoma with a Prominent Arterioportal Shunt: A Case Report

    SciTech Connect

    Hoshiai, Sodai, E-mail: hoshiai@sb4.so-net.ne.jp; Mori, Kensaku; Ishiguro, Toshitaka

    Although transcatheter arterial chemoembolization is one of the established treatments for hepatocellular carcinoma (HCC), it is difficult to treat HCCs with prominent arterioportal (AP) shunts because anticancer drugs and embolic materials migrate into the non-tumorous liver through the AP shunts and may cause liver infarction. We developed a novel method of balloon-assisted chemoembolization using a micro-balloon catheter alongside a microcatheter simultaneously inserted through a single 4.5-Fr guiding sheath, comprising proximal chemoembolization with distal arterial balloon occlusion. We applied this method to treat an HCC with a prominent distal AP shunt induced by previous proton beam therapy and achieved successful chemoembolizationmore » without non-tumorous liver infarction under temporal balloon occlusion of a distal AP shunt.« less

  12. Contura Multi-Lumen Balloon breast brachytherapy catheter: comparative dosimetric findings of a phase 4 trial.

    PubMed

    Arthur, Douglas W; Vicini, Frank A; Todor, Dorin A; Julian, Thomas B; Cuttino, Laurie W; Mukhopadhyay, Nitai D

    2013-06-01

    Final dosimetric findings of a completed, multi-institutional phase 4 registry trial using the Contura Multi-Lumen Balloon (MLB) breast brachytherapy catheter to deliver accelerated partial breast irradiation (APBI) in patients with early-stage breast cancer are presented. Three dosimetric plans with identical target coverage were generated for each patient for comparison: multilumen multidwell (MLMD); central-lumen multidwell (CLMD); and central-lumen single-dwell (CLSD) loading of the Contura catheter. For this study, a successful treatment plan achieved ideal dosimetric goals and included the following: ≥ 95% of the prescribed dose (PD) covering ≥ 95% of the target volume (TV); maximum skin dose ≤ 125% of the PD; maximum rib dose ≤ 145% of the PD; and V150 ≤50 cc and V200 ≤ 10 cc. Between January 2008 and February 2011, 23 institutions participated. A total of 318 patients were available for dosimetric review. Using the Contura MLB, all dosimetric criteria were met in 78.93% of cases planned with MLMD versus 55.38% with the CLMD versus 37.66% with the CLSD (P ≤.0001). Evaluating all patients with the full range of skin to balloon distance represented, median maximum skin dose was reduced by 12% and median maximum rib dose by 13.9% when using MLMD-based dosimetric plans compared to CLSD. The dosimetric benefit of MLMD was further demonstrated in the subgroup of patients where skin thickness was <5 mm, where MLMD use allowed a 38% reduction in median maximum skin dose over CLSD. For patients with rib distance <5 mm, the median maximum rib dose reduction was 27%. Use of the Contura MLB catheter produced statistically significant improvements in dosimetric capabilities between CLSD and CLMD treatments. This device approach demonstrates the ability not only to overcome the barriers of limited skin thickness and close rib proximity, but to consistently achieve a higher standard of dosimetric planning goals. Copyright © 2013 Elsevier Inc. All rights

  13. The efficacy of balloon dilation in achalasia is the result of stretching of the lower esophageal sphincter, not muscular disruption.

    PubMed

    Borhan-Manesh, F; Kaviani, M J; Taghavi, A R

    2016-04-01

    Pneumatic dilation (PD) of the lower esophageal sphincter (LES) in achalasia is a major palliative treatment. It is generally believed, although never substantiated, that therapeutic efficacy of ballooning in achalasia is the result of the disruption and tearing of the muscular layers of the LES. To clarify this issue, we investigated the frequency of muscular disruption at the LES, 24 hours after PD, by employing the endoscopic ultrasound (EUS), in a group of 43 consented patients with achalasia. Between July 2009 and March2012, 51 consecutive adult patients with tentative diagnosis of achalasia, some with recurrence of symptoms after an earlier treatment with balloon dilation, were evaluated and underwent PD, using Rigiflex balloon without major adverse effect. Out of the 51 evaluated, 43 eligible and consenting patients who underwent EUS, 24 hours after PD, using Olympus GF-UE 160 echoendoscope and an Aloka Prosound probe at 7.5 MHZ, are the subjects of this study. The EUS in 43 eligible patients revealed an intact LES in 36 (83.7%), small area of muscular disruption in 5 (11.6%) and small hematoma in 2 patients (4.6%). Our data convincingly demonstrate that the clinical effectiveness of balloon dilation in achalasia is not the result of muscular disruption, but of circumferential stretching of the LES. Our findings on the mechanism of action of PD in achalasia could result in modifying the current method of dilation for a safer procedure, by slowing the rate of inflation and allowing the sphincter to slowly stretch itself to the distending balloon. © 2015 The Authors. Diseases of the Esophagus published by Wiley Periodicals, Inc. on behalf of International Society for Diseases of the Esophagus.

  14. Immediate and late clinical and angiographic outcomes after GFX coronary stenting: is high-pressure balloon dilatation necessary?

    PubMed

    Park, S W; Hong, M K; Lee, C W; Kim, J J; Park, H K; Cho, G Y; Kang, D H; Song, J K; Park, S J

    2000-08-01

    The GFX stent is a balloon-expandable stent made of sinusoidal element of stainless steel. The adjunct high-pressure balloon dilatations were usually recommended in routine stenting procedure. The aim of this study was to evaluate the immediate and long-term clinical and angiographic outcomes and to investigate the necessity of high-pressure balloon dilatation during GFX stenting. In all, 172 consecutive patients underwent single 12 or 18 mm GFX stent implantation in 188 native coronary lesions. Two types of stenting technique were used: (1) stent size of a final stent-to-artery ratio of 1:1 (inflation pressure > 10 atm, high-pressure group), and (2) stent size of 0.5 mm bigger than reference vessel (inflation pressure < or = 10 atm, low-pressure group). The adjunct high-pressure balloon dilatations were performed only in cases of suboptimal results. The adjunct high-pressure balloon dilatation was required in 11 of 83 lesions (13%) in the high-pressure group and in 7 of 105 lesions (7%) in the low-pressure group (p = 0.203). Procedural success rate was 100%. There were no significant differences of in-hospital and long-term clinical events between the two groups. The overall angiographic restenosis rate was 17.7%; 18.4% in the high-pressure group and 17.1% in the low-pressure group (p = 0.991). The GFX stent is a safe and effective device with a high procedural success rate and favorable late clinical outcome for treatment of native coronary artery disease. Further randomized trials may be needed to compare stenting techniques in GFX stent implantation.

  15. Left spermatic vein retrograde sclerosis: comparison between sclerosant agent injection through a diagnostic catheter versus through an occluding balloon catheter.

    PubMed

    Basile, Antonio; Failla, Giovanni; La Vignera, Sandro; Condorelli, Rosita Angela; Calogero, Aldo; Vicari, Enzo; Granata, Antonio; Mundo, Elena; Caltabiano, Giuseppe; Pizzarelli, Marco; Messina, Martina; Scavone, Giovanni; Lanzafame, Franz; Iezzi, Roberto; Tsetis, Dimitrios

    2015-05-01

    The aim of this study was to compare the technical success between left spermatic vein (LSV) scleroembolisation achieved with the injection of sclerosant through a diagnostic catheter and through an occluding balloon (OB), in the treatment of male varicocele. From January 2012 to September 2013, we prospectively enrolled 100 patients with left varicocele and an indication for LSV scleroembolisation related to symptoms or spermiogram anomalies; patients were randomised to two groups (we wrote a list of 100 lines assigned casually with A or B and each patient was consecutively allocated to group A or B on the basis of this list). Patients in group A underwent injection of the sclerosing agent through an angiographic diagnostic catheter (free catheter technique) and patients in group B through an OB catheter (OB technique). In cases of incomplete occlusion of the LSV, the procedure was completed with coils. Total occlusion of the LSV at post-treatment phlebography during a Valsalva manoeuvre before any coil embolisation was considered a technical success. The rate of complications was also evaluated. The Fischer's test was used for statistical analysis. We evaluated a total of 90 patients because five patients for each group were not included in the statistical analysis owing to technical problems or complications. In group A we had a technical success of 75.6 versus 93.4 % in group B, and the difference was statistically significant (P = 0.003); in particular, we had to complete the embolisation with insertion of coils in 11 cases (24.4 %) in group A, and in three cases in group B (6.6 %). In group A, LSV rupture occurred in four cases (8 %) so the procedure was completed by sclerosant injection through the OB located distally to the lesion. These patients were not considered for evaluation. In another case, a high flow shunt towards the inferior vena cava was detected, so the patient underwent OB injection to stop the flow to the shunt, and was not included

  16. Association Between Gastroesophageal Reflux Disease After Pneumatic Balloon Dilatation and Clinical Course in Patients With Achalasia

    PubMed Central

    Min, Yang Won; Lee, Jin Hee; Min, Byung-Hoon; Lee, Jun Haeng; Kim, Jae J; Rhee, Poong-Lyul

    2014-01-01

    Background/Aims The occurrence of gastroesophageal reflux disease (GERD) is known to be associated with lower post-treatment lower esophageal sphincter pressure in patients with achalasia. This study aimed to elucidate whether GERD after pneumatic balloon dilatation (PD) has a prognostic role and to investigate how the clinical course of GERD is. Methods A total of 79 consecutive patients who were first diagnosed with primary achalasia and underwent PD as an initial treatment were included in this retrospective study. Single PD was performed using a 3.0 cm balloon. The patients were divided into two groups: 1) who developed GERD after PD (GERD group) and 2) who did not develop GERD after PD (non-GERD group). GERD was defined as pathological acid exposure, reflux esophagitis or typical reflux symptoms. Results Twenty one patients (26.6%) developed GERD after PD during follow-up. There were no significant differences between the two groups in demographic or clinical factors including pre- and post-treatment manometric results. All patients in GERD group were well responsive to maintenance proton pump inhibitor therapy including on demand therapy or did not require maintenance. During a median follow-up of 17.8 months (interquartile range, 7.1–42.7 months), achalasia recurred in 15 patients (19.0%). However, the incidence of recurrence did not differ according to the occurrence of GERD after PD. Conclusions GERD often occurs after even a single PD for achalasia. However, GERD after PD is well responsive to PPI therapy. Our data suggest that GERD after PD during follow-up does not appear to have a prognostic role. PMID:24840373

  17. Comparison of endoscopic papillary balloon dilation and sphincterotomy in young patients with CBD stones and gallstones.

    PubMed

    Seo, Yu Ri; Moon, Jong Ho; Choi, Hyun Jong; Kim, Dong Choon; Ha, Ji Su; Lee, Tae Hoon; Cha, Sang-Woo; Cho, Young Deok; Park, Sang-Heum; Kim, Sun-Joo

    2014-05-01

    Endoscopic biliary sphincterotomy (EBS) results in permanent loss of sphincter function and its long-term complications are unknown. Endoscopic papillary balloon dilation (EPBD) is an alternative procedure that preserves sphincter function, although it is associated with a higher risk of pancreatitis than is EBS. The aim of this study was to evaluate the safety and outcomes of EPBD with limited indications for removal of common bile duct (CBD) stones combined with gallstones in patients younger than 40 years. Young (age < 40 years) patients who had CBD stones combined with gallstones on imaging studies were enrolled in this study. A total of 132 patients were randomly divided into the EPBD group (n = 62) or the EBS group (n = 70) for extraction of CBD stones. The ballooning size of EPBD ranged from 6 to 10 mm. Complete bile duct clearance was achieved in 98.4 % (61/62) of the EPBD group and 100 % (70/70) of the EBS group. Mechanical lithotripsy was required in 8.1 % (5/62) of the EPBD group and 8.6 % (6/70) of the EBS group. The early complication rates were 8.1 % (5/62) (five pancreatitis) in the EPBD group and 11.4 % (8/70) (five [7.1 %] pancreatitis, two bleeding and one perforation) in the EBS group. The recurrence rates of CBD stones were 1.6 % (1/62) in the EPBD group and 5.7 % (4/70) in the EBS group. EPBD with limited indications was safe and effective as EBS for removal of CBD stones combined with gallstones in young patients who had a longer life expectancy.

  18. Laser Fenestration of Aortic Stent-Grafts Followed by Noncompliant vs Cutting Balloon Dilation: A Scanning Electron Microscopy Study.

    PubMed

    Lin, Jing; Parikh, Niraj; Udgiri, Naval; Wang, Shaoxia; Miller, Daniel F; Li, Chaojing; Panneton, Jean; Nutley, Mark; Zhang, Ze; Huang, Yunfan; Lu, Jun; Zhang, Jingyi; Wang, Lu; Guidoin, Robert

    2018-06-01

    To examine the effects of in situ laser fenestration and subsequent balloon dilation (noncompliant vs cutting) on the graft fabric of 4 aortic stent-graft models. In an in vitro setup, the Zenith TX2, Talent, Endurant, and Anaconda aortic stent-grafts (all made of polyester graft material) were subjected to laser fenestration with a 2.3-mm-diameter probe at low and high energy in a physiologic saline solution followed by balloon dilation of the hole. For the first series of tests, 6-mm-diameter noncompliant balloons were used and replaced for the second series by 6-mm-diameter cutting balloons. Each procedure was performed 5 times (5 fenestrations per balloon type). The fenestrations were examined visually and with light and scanning electron microscopy. Each fenestration demonstrated various degrees of fraying and/or tearing regardless of the device. The monofilament twill weave of the Talent endograft tore in the warp direction up to 7.09±0.46 mm at high energy compared with 2.41±0.26 mm for the Endurant multifilament device. The fenestrations of the 3 endografts with multifilament weave (Zenith, Anaconda, and Endurant) showed more fraying; fenestration areas in the multifilament Endurant were >10 mm 2 at low and high energy. The fenestrations were free of melted fibers, but minor blackening of the filaments was observed in all devices. Overall, the cutting balloons resulted in worse tearing and damage. Of note, the edges of the dilated laser-formed fenestrations of the Talent and the Endurant grafts demonstrated evidence of additional shredded yarns. In situ fenestration does not cause any melting of the polyester; however, the observed structural damage to the fabric construction must be carefully considered. Cutting balloons caused various levels of tearing compared to the noncompliant balloons and cannot be recommended for use in this application. Rather, noncompliant balloons should be employed, but only with endografts constructed from multifilament yarns

  19. Endoscopic Cold Incision, Balloon Dilation, Mitomycin C Application, and Steroid Injection for Adult Laryngotracheal Stenosis

    PubMed Central

    Parker, Noah P.; Bandyopadhyay, Dipankar; Misono, Stephanie; Goding, George S.

    2017-01-01

    Objectives/Hypothesis To describe the presentation, stenosis characteristics, etiological differences, and outcomes of adult laryngotracheal stenosis treated with endoscopic cold incision, balloon dilation, topical mitomycin C application, and steroid injection. Study Design Retrospective chart review. Methods Demographic and clinical data were extracted for patients treated between March 2000 and December 2010. Prolonged intubation and idiopathic patient data were utilized for comparative analysis. Results Eighty patients (65 females; 15 males; 220 procedures; 2.9 years mean follow-up) presented with dyspnea (81%) and/or exercise intolerance (40%). Most commonly, etiologies were idiopathic (53 of 80; 66%) or prolonged intubation (14 of 80; 18%). Mean procedures per patient and interval between procedures were 2.8 procedures and 405 days, respectively. Mean stenosis length and distance from the caudal phonating edge of the true vocal folds were 9 mm and 19 mm. Complication, tracheotomy, and open-procedure rates were 1.8%, 1.4%, and 10.0%, respectively. Patients with more than two procedures demonstrated a mean 4-mm reduction in stenosis length and a 2-mm cephalad progression of stenosis over time. More caudal stenoses required more frequent procedures. Procedures were less frequent as more procedures were performed. Stenosis characteristics, interval between procedures, and total procedures were similar between idiopathic patients with or without intubation histories, but different between idiopathic and prolonged intubation patients. Conclusions This procedure was shown to be a viable option in adult laryngotracheal stenosis. Repeat dilation was likely, but was performed without adversely affecting stenosis characteristics. Stenoses farther from the vocal folds required procedures more frequently. Idiopathic patients with a history of brief, elective intubation had stenosis characteristics and responses to therapy similar to idiopathic patients without an

  20. [Clinical application of ultrasound guided Fogarty balloon catheter in arterial crisis].

    PubMed

    Li, Xiaodong; Wang, Pei; Yu, Changyu; Yan, Xiaowei; Yin, Jing

    2017-10-01

    To explore the effectiveness of arterial crisis after replantation of limb treated by ultrasound guided Fogarty balloon catheter. Between January 2012 and July 2016, 27 patients suffered from arterial crisis after replantation of limb were treated with ultrasound guided Fogarty balloon catheter combined with thrombolytic anticoagulant. There were 18 males and 9 females with the age of 19-51 years (mean, 32 years). The limb mutilation position was at knee joint in 3 cases, lower limb in 9 cases, ankle joint in 6 cases, elbow joint in 2 cases, forearm in 4 cases, and wrist joint in 3 cases. The arterial crisis happened at 2.5-18 hours (mean, 7.5 hours) after limb replantation surgery. Color doppler ultrasonography was used to diagnose the arterial thrombosis, finally the anastomotic thrombosis were found in 16 cases, non-anastomotic thrombosis in 7 cases, and combined thrombosis in 4 cases. All the thrombosis were deteced in the arteries with the length of 0.8-3.9 cm. No complication such as vascular perforation, rupture, air embolism, thromboembolism, wound infection, or sepsis happened after operation. Arterial crisis occurred again in 3 cases at 1.5-13.5 hours after limb replantation and treated by arterial exploration, 1 case was treated successfully; 2 cases had arterial occlusion and partial necrosis of limb, and got amputation treatment at last. The rest 24 cases survived with the incision healing by first stage. In the 24 cases, 1 case suffered from acute myonephropathic metabolic syndrome and corrected after hemodialysis; 1 case suffered from acute liver functional damage and corrected by comprehensive treatment of internal medicine. The 24 patients were followed up 7-38 months (mean, 11 months). At last follow-up, blood supply of the limb was good with normal skin temperature and improved sense of feeling, activity, and swelling. According to Chinese Medical Association of hand surgery to the upper extremity function assessment standard, the results were

  1. Contura Multi-Lumen Balloon Breast Brachytherapy Catheter: Comparative Dosimetric Findings of a Phase 4 Trial

    SciTech Connect

    Arthur, Douglas W., E-mail: darthur@mcvh-vcu.edu; Vicini, Frank A.; Todor, Dorin A.

    2013-06-01

    Purpose: Final dosimetric findings of a completed, multi-institutional phase 4 registry trial using the Contura Multi-Lumen Balloon (MLB) breast brachytherapy catheter to deliver accelerated partial breast irradiation (APBI) in patients with early-stage breast cancer are presented. Methods and Materials: Three dosimetric plans with identical target coverage were generated for each patient for comparison: multilumen multidwell (MLMD); central-lumen multidwell (CLMD); and central-lumen single-dwell (CLSD) loading of the Contura catheter. For this study, a successful treatment plan achieved ideal dosimetric goals and included the following: ≥95% of the prescribed dose (PD) covering ≥95% of the target volume (TV); maximum skin dose ≤125%more » of the PD; maximum rib dose ≤145% of the PD; and V150 ≤50 cc and V200 ≤10 cc. Results: Between January 2008 and February 2011, 23 institutions participated. A total of 318 patients were available for dosimetric review. Using the Contura MLB, all dosimetric criteria were met in 78.93% of cases planned with MLMD versus 55.38% with the CLMD versus 37.66% with the CLSD (P≤.0001). Evaluating all patients with the full range of skin to balloon distance represented, median maximum skin dose was reduced by 12% and median maximum rib dose by 13.9% when using MLMD-based dosimetric plans compared to CLSD. The dosimetric benefit of MLMD was further demonstrated in the subgroup of patients where skin thickness was <5 mm, where MLMD use allowed a 38% reduction in median maximum skin dose over CLSD. For patients with rib distance <5 mm, the median maximum rib dose reduction was 27%. Conclusions: Use of the Contura MLB catheter produced statistically significant improvements in dosimetric capabilities between CLSD and CLMD treatments. This device approach demonstrates the ability not only to overcome the barriers of limited skin thickness and close rib proximity, but to consistently achieve a higher standard of dosimetric

  2. Double Guiding Catheters for Complex Percutaneous Coronary Intervention

    PubMed Central

    Chou, Shing-Hsien; Lin, Chia-Pin; Lin, Yen-Chen; Kuo, Chi-Tai; Lin, Ming-Shyan; Chang, Chi-Jen

    2012-01-01

    A large-lumen guiding catheter is often used for complex percutaneous coronary intervention—particularly when a final kissing-balloon or 2-stent technique is required. However, catheter insertion is sometimes restricted by diseased vascular access sites or a tortuous vascular route. We report 2 cases in which a unique double guiding catheter technique was used to create a lumen of sufficient size for complex percutaneous coronary intervention. In each patient, two 6F guiding catheters were used concurrently to engage the ostium of 1 target vessel. In 1 patient, these catheters were used for the delivery of 2 balloons to complete kissing-balloon dilation after single-stent placement. In the other patient, the catheters were used to deliver 2 stents sequentially to their respective target lesions. The stents were then deployed simultaneously as kissing stents, followed by high-pressure kissing-balloon postdilation. PMID:22412243

  3. Endoscopic papillary large balloon dilation for the removal of bile duct stones.

    PubMed

    Kim, Jin Hong; Yang, Min Jae; Hwang, Jae Chul; Yoo, Byung Moo

    2013-12-14

    Endoscopic papillary large balloon dilation (EPLBD) with endoscopic sphincterotomy (EST) has been widely used as the alternative to EST along with endoscopic mechanical lithotripsy (EML) for the removal of large or difficult bile duct stones. Furthermore, EPLBD without EST was recently introduced as its simplified alternative technique. Thus, we systematically searched PubMed, Medline, the Cochrane Library and EMBASE, and analyzed all gathered data of EPLBD with and without EST, respectively, by using a single standardized definition, reviewing relevant literatures, published between 2003 and June 2013, where it was performed with large-diameter balloons (12-20 mm). The outcomes, including the initial success rate, the rate of needs for EML, and the overall success rate, and adverse events were assessed in each and compared between both of two procedures: "EPLBD with EST" and "EPLBD without EST". A total of 2511 procedures from 30 published articles were included in EPLBD with EST, while a total of 413 procedures from 3 published articles were included in EPLBD without EST. In the results of outcomes, the overall success rate was 96.5% in EPLBD with EST and 97.2% in EPLBD without EST, showing no significant difference between both of them. The initial success rate (84.0% vs 76.2%, P < 0.001) and the success rate of EPLBD without EML (83.2% vs 76.7%, P = 0.001) was significantly higher, while the rate of use of EML was significantly lower (14.1% vs 21.6%, P < 0.001), in EPLBD with EST. The rate of overall adverse events, pancreatitis, bleeding, perforation, other adverse events, surgery for adverse events, and fatal adverse events were 8.3%, 2.4%, 3.6%, 0.6%, 1.7%, 0.2% and 0.2% in EPLBD with EST and 7.0%, 3.9%, 1.9%, 0.5%, 0.7%, 0% and 0% in EPLBD without EST, respectively, showing no significant difference between both of them. In conclusion, recent accumulated results of EPLBD with or even without EST suggest that it is a safe and effective procedure for the

  4. How to perform combined cutting balloon and high pressure balloon valvuloplasty for dogs with subaortic stenosis.

    PubMed

    Kleman, Mandi E; Estrada, Amara H; Maisenbacher, Herbert W; Prošek, Robert; Pogue, Brandon; Shih, Andre; Paolillo, Joseph A

    2012-01-01

    Subvalvular aortic stenosis (SAS) is one of the most common congenital cardiac malformations in dogs. Unfortunately, the long term success rate and survival data following either open heart surgery or catheter based intervention has been disappointing in dogs with severe subaortic stenosis. Medical therapy is currently the only standard recommended treatment option. A cutting balloon dilation catheter has been used successfully for resistant coronary artery and peripheral pulmonary arterial stenoses in humans. This catheter is unique in that it has the ability to cut, or score, the stenotic region prior to balloon dilatation of the stenosis. The use of cutting balloon valvuloplasty combined with high pressure valvuloplasty for dogs with severe subaortic stenosis has recently been reported to be a safe and feasible alternative therapeutic option. The following report describes this technique, outlines the materials required, and provides some 'tips' for successful percutaneous subaortic balloon valvuloplasty. Copyright © 2012 Elsevier B.V. All rights reserved.

  5. Image-Guided High-Dose Rate Brachytherapy in Cervix Carcinoma Using Balloon Catheter and Belt Immobilization System.

    PubMed

    Fan, Qiyong; Yeung, Anamaria R; Amdur, Robert; Helmig, Richard; Park, Justin; Li, Jonathan; Kahler, Darren; Liu, Chihray; Lu, Bo

    2017-06-01

    The efficacy of image-guided high-dose rate brachytherapy for cervical cancer is limited by the ineffective rectal sparing devices available commercially and the potential applicator movement. We developed a novel device using a balloon catheter and a belt immobilization system, serving for rectal dose reduction and applicator immobilization purposes, respectively. The balloon catheter is constructed by gluing a short inflatable tube to a long regular open-end catheter. Contrast agent (10) cm 3 is injected into the inflatable end, which is affixed to the tandem and ring applicator, to displace the posterior vaginal wall. The belt immobilization system consists of a specially designed bracket that can hold and fix itself to the applicator, a diaper-like Velcro fastener package used for connecting the patient's pelvis to the bracket, and a buckle that holds the fasteners to stabilize the whole system. The treatment data for 21 patients with cervical cancer using both balloon catheter and belt immobilization system were retrospectively analyzed. Computed tomography and magnetic resonance images, acquired about 30 minutes apart, were registered to evaluate the effectiveness of the immobilization system. In comparison with a virtual rectal blade, the balloon decreased the rectal point dose by 34% ± 4.2% (from 276 ± 57 to 182 ± 38 cGy), corresponding to an extra sparing distance of 7.9 ± 1.1 mm. The maximum sparing distance variation per patient is 1.4 ± 0.6 mm, indicating the high interfractional reproducibility for rectum sparing. With the immobilization system, the mean translational and rotational displacements of the applicator set are <3 mm and <1.5°, respectively, in all directions. The rectal balloon provides significant dose reduction to the rectum and it may potentially minimize patient discomfort. The immobilization system permits almost no movement of the applicator during treatment. This work has the potential to be promoted as a standardized solution

  6. Evolving trends in sinus surgery: What is the impact of balloon sinus dilation?

    PubMed

    Svider, Peter F; Darlin, Spencer; Bobian, Michael; Sekhsaria, Vibhav; Harvey, Richard J; Gray, Stacey T; Baredes, Soly; Folbe, Adam J; Eloy, Jean Anderson

    2018-06-01

    Balloon dilation (BD) represents a minimally invasive alternative to endoscopic sinus surgery (ESS). Although BD was introduced in 2006, distinct Current Procedural Terminology (CPT) codes were not available until 2011, making prior analysis of population-based trends difficult. Our objectives were to evaluate these trends and compare any changes to the use of traditional ESS techniques. Geographic trends also were evaluated. Medicare Part B national datasets encompassing procedures from 2011 to 2015 were obtained. ESS CPT codes (frontal sinusotomy, maxillary antrostomy with/without tissue removal, sphenoidotomy) and BD codes were searched to determine temporal trends in their use. Additionally, state carriers were individually evaluated for geographic trends. National use of BD increased greater than five-fold (39,193 from 7,496 among Medicare patients), whereas the use of ESS increased by only 5.9%. This increase in BD was observed across all sites, including the sphenoid (7.0x), maxillary (5.1x), and frontal (4.7x) sinuses. In the most recent year for which data was available (2015), a significantly greater portion of sinus procedures in these sites utilized BD in the South (42.1%) compared to the Northeast (30.6%), West (29.5%), and Midwest (25.3%) regions (P < 0.0001). The performance of BD has increased markedly in recent years. Because the use of ESS codes remain stable, observed BD trends are unlikely to be due simply to greater familiarity with newer CPT coding. The reasons for the striking increase in BD popularity are speculative and beyond the scope of this analysis, but further study may be needed. NA. Laryngoscope, 128:1299-1303, 2018. © 2017 The American Laryngological, Rhinological and Otological Society, Inc.

  7. The role of industry influence in sinus balloon dilation: Trends over time.

    PubMed

    Gadkaree, Shekhar K; Rathi, Vinay K; Gottschalk, Esther; Feng, Allen L; Phillips, Katie M; Scangas, George A; Metson, Ralph

    2018-05-08

    Balloon dilation (BD) is a controversial alternative to conventional sinus surgery. The role of industry on practice patterns remains unknown. The aim of this study was to determine whether industry payments from BD manufacturers influence practice patterns for otolaryngologists and evaluate how these payments change over time. Retrospective cohort study using Medicare Provider Utilization and Payment (PUP) Data and Center for Medicare and Medicaid Services Open Payments (OP) general payment datasets. A total of 294 otolaryngologists identified in the PUP dataset who performed BD procedures from January 1, 2013, to December 31, 2015, were cross-referenced in the OP dataset from January 1, 2014, to December 31, 2016, for BD manufacturer payments. Payments to surgeons performing BD stratified by amount, type, and number of procedures performed were primary outcome measures. Of the 294 otolaryngologists reporting BD procedures, 223 (76%) received payments from a company that manufactures BD devices. Receipt of $2,500 in BD payments was associated with performance of one additional BD procedure, and consulting fees were most positively associated with performing additional BD procedures (P = 0.006). The providers receiving the most in BD payments were more likely to continue to receive the most in payments, regardless of number of BD procedures performed. Performing more BD procedures did not correlate with decrease in other sinus procedures. Payments to otolaryngologists from manufacturers of sinus BD devices are associated with the performance of an increased number of such procedures. Surgeons should consider the impact of interactions with industry when evaluating patients for BD procedures. 4. Laryngoscope, 00:000-000, 2018. © 2018 The American Laryngological, Rhinological and Otological Society, Inc.

  8. Is Heller myotomy better than balloon dilation? A meta-analysis.

    PubMed

    Illés, Anita; Farkas, Nelli; Hegyi, Péter; Garami, András; Szabó, Imre; Solymár, Margit; Pétervári, Erika; Balaskó, Márta; Pár, Gabriella; Sarlós, Patrícia; Bajor, Judit; Szűcs, Ákos; Czimmer, József; Szemes, Kata; Vincze, Áron

    2017-06-01

    Endoscopic balloon dilation (EBD) and laparoscopic Heller myotomy (LHM) are the most commonly performed treatment options for achalasia. Decision between these treatment options is difficult. The aim of this meta-analysis was to evaluate the efficacy of EBD compared to LHM. The electronic databases PubMed, Embase and Cochrane Controlled Trials Registry were systematically searched for the period between January 1, 1976 and December 31, 2015. Meta-analysis was performed using the PICOS (problem, intervention, comparison, outcome, study design) format. Efficacy and safety of EBD were compared to LHM. Forest plot analyses were used to illustrate the success rate, perforation rate and post-procedural gastroesophageal reflux. Using the search strategy, eight studies met the selection criteria and were included in the meta-analysis. The total number of patients included was 749 (360 in the EBD group and 389 in the LHM group). The success rate was lower in the EBD group than in the LHM group (OR=0.486; CI: 0.304-0.779; p=0.003). The rate of perforation did not differ significantly between the EBD and LHM group (RR= 0.635, CI: 0.340-1.186, p=0.154). The incidence of post-procedural symptomatic gastroesophageal reflux did not differ between the two treatment groups (RR=0.663, CI: 0.328-1.343, p=0.254). Our data suggest that the efficacy of LHM is superior to that of EBD, while there is no difference in safety between the two treatment groups.

  9. Industry relationships are associated with performing a greater number of sinus balloon dilation procedures.

    PubMed

    Eloy, Jean Anderson; Svider, Peter F; Bobian, Michael; Harvey, Richard J; Gray, Stacey T; Baredes, Soly; Folbe, Adam J

    2017-09-01

    Industry outreach promotes awareness of novel technologies. However, concerns have been raised that such relationships may also unduly impact medical decision-making. Our objective in this study was to evaluate industry relationships among practitioners who frequently employ balloon dilation (BD), characterizing whether there is any association between financial relationships and BD utilization. Provider utilization data (FY-2014) was accessed for individuals billing BD procedures to Medicare, the largest healthcare payor in the United States. The names of individuals included in these data sets were cross-referenced with the Centers for Medicare and Medicaid Services Open Payment site to determine the extent of industry relationships during this same year. Individuals included in this analysis were organized by those with "significant" ($1,000 to $10,000) and "major" (> $10,000) industry relationships. Practice setting, training, and experience were also evaluated. Of the 302 otolaryngologists who billed enough BDs for inclusion in this data set, 99.3% were in private practice, 89.7% were board-certified, 8.3% had facial plastic and reconstructive fellowship training, and 1.3% had rhinology fellowship training. There was a significant increase in BDs performed with increasing BD company financial contributions (analysis of variance, p = 0.0003). Individuals without "significant" relationships with BD companies billed fewer BDs than those with at least "significant" (>$1,000) relationships (57.0 ± 4.3 vs 87.7 ± 10.0, p = 0.001). There is an association between receiving money from industry and the frequency with which otolaryngologists employ BD. Although our analysis demonstrates an association, these results in no way imply causation. Further analysis exploring the reasons for this association may be necessary. © 2017 ARS-AAOA, LLC.

  10. Endoscopic balloon dilatation of Crohn's disease strictures: results from a large United kingdom series.

    PubMed

    Bhalme, Mahesh; Sarkar, Sanchoy; Lal, Simon; Bodger, Keith; Baker, Rose; Willert, Robert P

    2014-02-01

    Stricturing is a common complication of Crohn's disease. Endoscopic balloon dilatation (EBD) offers a valuable alternative to surgical intervention, but there are limited data on factors influencing its safety and efficacy. A multicenter retrospective audit across 4 U.K. teaching hospitals was performed on the use of EBD for Crohn's strictures between 1998 and 2011. Demographics, smoking status, medications, C-reactive protein, endoscopic findings, and subsequent surgery at follow-up were recorded. Success of EBD was defined as symptomatic improvement without the need for surgery at follow-up. Seventy-nine patients (47 women; median age, 48 yr) were identified for this study. Forty-eight (61%) patients had ileocolonic anastomotic strictures, whereas the rest had de novo strictures. In total, 191 EBDs (range, 1-11; median 2) were carried out on 93 strictures (range, 1-5; median 1) over a median duration of 12 months (range, 1-84). There were no serious adverse events. Success at index EBD was 34%, with a further 43% achieving long-term benefit from additional EBDs. Eighteen (23%) patients required surgery. Time to surgery after the first EDB was 2.6 to 71.1 months (median, 12.8 mo). Longer Crohn's disease duration (P = 0.03) and high C-reactive protein (P = 0.008) were associated with an increased need for subsequent surgery. EBD was safe and effective in achieving long-term symptom improvement and avoidance of surgery in most patients. Prospective controlled trials are needed to evaluate the effect of other factors, including Crohn's disease phenotype, and the role of concomitant medication to identify those best suited to EBD.

  11. Entrapment of guide-wire during oesophageal dilation.

    PubMed

    Misra, S P; Dwivedi, M

    1997-01-01

    We report a patient who developed oesophageal stricture after accidental ingestion of acid. During one of the oesophageal dilation sessions, a Savary-Gillard guide-wire got entrapped in the stomach and had to be removed surgically. A Foley catheter, placed for feeding purposes, migrated into the proximal small intestine causing acute intestinal obstruction. The balloon of the Foley catheter had to be punctured using a sclerotherapy needle and the catheter withdrawn.

  12. Modified tube gastropexy using a mushroom-tipped silicone catheter for management of gastric dilatation-volvulus in dogs.

    PubMed

    Belch, A; Rubinos, C; Barnes, D C; Nelissen, P

    2017-02-01

    To report the short- and long-term complications and clinical outcomes of a cohort of dogs managed for gastric dilatation-volvulus using a modified right-sided tube gastropexy technique. Retrospective case series. Of 31 dogs treated, 29 (93·5%) had an excellent short-term outcome, and gastric dilatation-volvulus did not recur in any dog. Twenty-six dogs (84%) were initially fed via the gastrostomy tube postoperatively; three (9·7%) suffered a major complication including septic peritonitis (n=1), and premature tube removal (n=2). Fourteen dogs (45·1%) had minor complications including mild, self-limiting discharge from the stoma site in 13. Modified tube gastropexy using a mushroom-tipped silicone catheter is an effective and safe surgical method for the management of gastric dilatation-volvulus. The gastrostomy tube allowed early enteral feeding and easy administration of medications, including gastroprotectants. © 2017 British Small Animal Veterinary Association.

  13. Balloon dilation of the eustachian tube is indeed a "gizmo" until future research proves safety and efficacy.

    PubMed

    Bluestone, Charles D

    2014-09-01

    In the April 2014 issue of this journal, Richard M. Rosenfeld, MD, MPH, wrote an editorial in which he recommends distinguishing "fanciful gizmos from truly useful technology," provides 5 criteria to evaluate a gizmo, and includes as one of the current ones balloons to "open clogged ears." The implication is that balloon dilation for suspected eustachian tube dysfunction-middle ear disease is an unproven procedure. Coincidentally, on April 1, the National Institutes of Health (NIH) awarded an Exploratory/Development grant to the University of Pittsburgh to evaluate this new treatment, which affirms that the NIH agrees that this procedure is of uncertain efficacy. © American Academy of Otolaryngology—Head and Neck Surgery Foundation 2014.

  14. Feasibility and safety of catheter ablation of electrical storm in ischemic dilated cardiomyopathy.

    PubMed

    Dello Russo, Antonio; Casella, Michela; Pelargonio, Gemma; Santangeli, Pasquale; Bartoletti, Stefano; Bencardino, Gianluigi; Al-Mohani, Ghaliah; Innocenti, Ester; Di Biase, Luigi; Avella, Andrea; Pappalardo, Augusto; Carbucicchio, Corrado; Bellocci, Fulvio; Fiorentini, Cesare; Natale, Andrea; Tondo, Claudio

    2016-06-01

    Electrical storm is an emergency in 'implantation of a cardioverter defibrillator' carriers with ischemic dilated cardiomyopathy (DCM) and negatively impacts long-term prognosis. We evaluated the feasibility, safety, and effectiveness of radiofrequency catheter ablation (RFCA) in controlling electrical storm and its impact on survival and ventricular tachycardia/fibrillation recurrence. We enrolled 27 consecutive patients (25 men, age 73.1 ± 6.5 years) with ischemic DCM and an indication to RFCA for drug-refractory electrical storm. The immediate outcome was defined as failure or success, depending on whether the patient's clinical ventricular tachycardia could still be induced after RFCA; electrical storm resolution was defined as no sustained ventricular tachycardia/ventricular fibrillation in the next 7 days. Of the 27 patients, 1 died before RFCA; in the remaining 26 patients, a total of 33 RFCAs were performed. In all 26 patients, RFCA was successful, although in 6/26 patients (23.1%), repeated procedures were needed, including epicardial ablation in 3/26 (11.5%). In 23/26 patients (88.5%), electrical storm resolution was achieved. At a follow-up of 16.7 ± 8.1 months, 5/26 patients (19.2%) had died (3 nonsudden cardiac deaths, 2 noncardiac deaths) and 10/26 patients (38.5%) had ventricular tachycardia recurrence; none had electrical storm recurrence. A worse long-term outcome was associated with lower glomerular filtration rate, wider baseline QRS, and presence of atrial fibrillation before electrical storm onset. In patients with ischemic DCM, RFCA is well tolerated, feasible and effective in the acute management of drug-refractory electrical storm. It is associated with a high rate of absence of sustained ventricular tachycardia episodes over the subsequent 7 days. After successful ablation, long-term outcome was mainly predicted by baseline clinical variables.

  15. Difficulty in tracheal extubation followed by tracheal collapse after balloon dilatation for tracheal stenosis therapy: A case report.

    PubMed

    Li, Nana; Zhu, Linjia; Sun, Jie; Pan, Yinbing; Gao, Mei

    2018-06-01

    Tracheobronchomalacia (TBM) refers to the weakening trachea or the trachea loss of structural integrity of airway cartilaginous structures. It causes tracheal stenosis, resulting in significantly high rates of mortality. Bronchoplasty by high-pressure balloon dilation under general anesthesia is a simple but effective and safe method to treat tracheobronchial stenosis. However, recurrent postoperative dyspnea after extubation due to tracheal collapse is still a challenge for anesthetists. A 52-year-old man weighing 72 kg was scheduled for balloon dilatation surgery under general anesthesia because of breathing difficulties caused by tracheal stenosis. His previous medical history included rheumatoid arthritis, obstructive sleep apnea syndrome (OSAS), chronic bronchitis and a history of tracheal intubation. Laryngeal computerized tomography confirmed the stenosis at the level of thyroid gland. The tracheal collapse after balloon dilatation for tracheal stenosis therapy. Postoperatively, the patient presented with more serious and repetitive symptoms of dyspnea after extubation when compared to that before treatment. So, we had to re-insert the laryngeal mask airway (LMA), and exclude some anesthesia-associated factors, such as laryngospasm, bronchospasm and so on. After a series of treatments, we ultimately found the cause in time (the airway collapsed), and succeeded in tracheal extubation after the stent was inserted. The patient recovered well and reported high satisfaction with anesthesia management. In such an emergency even, the anesthesiologist should take valuable treatments to ensure the patient's effective ventilation. If the anesthesia-related factors can be eliminated, tracheomalacia or airway collapse should be considered whenever dyspnea occurs in the patients who unexpectedly fail to be extubated.

  16. Mucosal perforation during laparoscopic surgery for achalasia: impact of preoperative pneumatic balloon dilation.

    PubMed

    Souma, Yoshihito; Nakajima, Kiyokazu; Taniguchi, Eiji; Takahashi, Tsuyoshi; Kurokawa, Yukinori; Yamasaki, Makoto; Miyazaki, Yasuhiro; Makino, Tomoki; Hamada, Tetsuhiro; Yasuda, Jun; Yumiba, Takeyoshi; Ohashi, Shuichi; Takiguchi, Shuji; Mori, Masaki; Doki, Yuichiro

    2017-03-01

    Controversy remains whether preoperative pneumatic balloon dilation (PBD) influences the surgical outcome of laparoscopic esophagocardiomyotomy in patients with esophageal achalasia. The aim of this study was to evaluate whether preoperative PBD represents a risk factor for surgical complications and affects the symptomatic and/or functional outcomes of laparoscopic Heller myotomy with Dor fundoplication (LHD). A retrospective chart review was conducted on a prospectively compiled surgical database of 103 consecutive patients with esophageal achalasia who underwent LHD from November 1994 to September 2014. The following data were compared between the patients with preoperative PBD (PBD group; n = 26) and without PBD (non-PBD group; n = 77): (1) patients' demographics: age, gender, body mass index, duration of symptoms, maximum transverse diameter of esophagus; (2) operative findings: operating time, blood loss, intraoperative complications; (3) postoperative course: complications, clinical symptoms, postoperative treatment; and (4) esophageal functional tests: preoperative and postoperative manometric data and postoperative profile of 24-h esophageal pH monitoring. (1) No significant differences were observed in the patients' demographics. (2) Operative findings were similar between the two groups; however, the incidence of mucosal perforation was significantly higher in the PBD group (n = 8; 30.7 %) compared to the non-PBD group (n = 6; 7.7 %) (p = 0.005). (3) Postoperative complications were not encountered in either group. The differences were not significant for postoperative clinical symptoms, the incidence of gastroesophageal reflux disease, or necessity of postoperative treatments. (4) Lower esophageal sphincter pressure was effectively reduced in both groups, and no differences were observed in manometric data or 24-h pH monitoring profiles between the two groups. Multivariate logistic regression analysis showed that preoperative PBD and the

  17. Double balloon catheter for induction of labour in Chinese women with previous caesarean section: one-year experience and literature review.

    PubMed

    Cheuk, Queenie K Y; Lo, T K; Lee, C P; Yeung, Anita P C

    2015-06-01

    To evaluate the efficacy and safety of double balloon catheter for induction of labour in Chinese women with one previous caesarean section and unfavourable cervix at term. Retrospective cohort study. A regional hospital in Hong Kong. Women with previous caesarean delivery requiring induction of labour at term and with an unfavourable cervix from May 2013 to April 2014. Primary outcome was to assess rate of successful vaginal delivery (spontaneous or instrument-assisted) using double balloon catheter. Secondary outcomes were double balloon catheter induction-to-delivery and removal-to-delivery interval; cervical score improvement; oxytocin augmentation; maternal or fetal complications during cervical ripening, intrapartum and postpartum period; and risk factors associated with unsuccessful induction. All 24 Chinese women tolerated double balloon catheter well. After double balloon catheter expulsion or removal, the cervix successfully ripened in 18 (75%) cases. The improvement in Bishop score 3 (interquartile range, 2-4) was statistically significant (P<0.001). Overall, 18 (75%) cases were delivered vaginally. The median insertion-to-delivery and removal-to-delivery intervals were 19 (interquartile range, 13.4-23.0) hours and 6.9 (interquartile range, 4.1-10.8) hours, respectively. Compared with cases without, the interval to delivery was statistically significantly shorter in those with spontaneous balloon expulsion or spontaneous membrane rupture during ripening (7.8 vs 3.0 hours; P=0.025). There were no major maternal or neonatal complications. The only factor significantly associated with failed vaginal birth after caesarean was previous caesarean section for failure to progress (P<0.001). This is the first study using double balloon catheter for induction of labour in Asian Chinese women with previous caesarean section. Using double balloon catheter, we achieved a vaginal birth after caesarean rate of 75% without major complications.

  18. Shock wave therapy effectively attenuates inflammation in rat carotid artery following endothelial denudation by balloon catheter.

    PubMed

    Shao, Pei-Lin; Chiu, Chaw-Chi; Yuen, Chun-Man; Chua, Sarah; Chang, Li-Teh; Sheu, Jiunn-Jye; Sun, Cheuk-Kwan; Wu, Chiung-Jen; Wang, Ching-Jen; Yip, Hon-Kan

    2010-01-01

    This study investigates the effectiveness of extracorporeal shock wave (ECSW) in ameliorating inflammatory mediator expression and neointimal formation in a rat model of vascular injury. Male Sprague-Dawley rats with left carotid artery (LCA) injury induced by balloon dilatation (BD; group 1) were compared with group 2 [LCA injury plus ECSW-181 (defined as 181 total shocks given in LCA at 0.011 mJ/mm(2)) on day 2 post-LCA injury], and group 3 (normal controls). The rats in each group were further divided into 3 subgroups (n = 6, each) that were sacrificed on postoperative day 3, 7 and 14, respectively. The results demonstrated that, compared to groups 2 and 3, group 1 had significantly increased cellular expression of CD40, interleukin-18, and connexin 43 at each analyzed time point (all p < 0.001). Additionally, LCCA macrophage (CD68) recruitment was substantially increased in group 1 compared to groups 2 and 3 (all p < 0.001). Furthermore, LCA neointimal proliferation and media thickness were markedly higher in group 1 than in groups 2 and 3 on days 7 and 14 post-BD (all p < 0.001). ECSW markedly attenuates inflammatory responses, proliferation of neointima and smooth muscle cells in a rat vascular injury model.

  19. Diffusing, side-firing, and radial delivery laser balloon catheters for creating subsurface thermal lesions in tissue

    NASA Astrophysics Data System (ADS)

    Chang, Chun-Hung; Fried, Nathaniel M.

    2016-02-01

    Infrared lasers have been used in combination with applied cooling methods to preserve superficial skin layers during cosmetic surgery. Similarly, combined laser irradiation and tissue cooling may also allow development of minimally invasive laser therapies beyond dermatology. This study compares diffusing, side-firing, and radial delivery laser balloon catheter designs for creation of subsurface lesions in tissue, ex vivo, using a near-IR laser and applied contact cooling. An Ytterbium fiber laser with 1075 nm wavelength delivered energy through custom built 18 Fr (6-mm-OD) balloon catheters incorporating either 10-mm-long diffusing fiber tip, 90 degree side-firing fiber, or radial delivery cone mirror, through a central lumen. A chilled solution was flowed through a separate lumen into 9-mm-diameter balloon to keep probe cooled at 7°C. Porcine liver tissue samples were used as preliminary tissue model for immediate observation of thermal lesion creation. The diffusing fiber produced subsurface thermal lesions measuring 49.3 +/- 10.0 mm2 and preserved 0.8 +/- 0.1 mm of surface tissue. The side-firing fiber produced subsurface thermal lesions of 2.4 +/- 0.9 mm2 diameter and preserved 0.5 +/- 0.1 mm of surface tissue. The radial delivery probe assembly failed to produce subsurface thermal lesions, presumably due to the small effective spot diameter at the tissue surface, which limited optical penetration depth. Optimal laser power and irradiation time measured 15 W and 100 s for diffusing fiber and 1.4 W and 20 s, for side-firing fiber, respectively. Diffusing and side-firing laser balloon catheter designs provided subsurface thermal lesions in tissue. However, the divergent laser beam in both designs limited the ability to preserve a thicker layer of tissue surface. Further optimization of laser and cooling parameters may be necessary to preserve thicker surface tissue layers.

  20. [Anesthetic management of tracheobronchial stent insertion in patients who underwent laser resection, balloon dilatation and tracheostomy in advance].

    PubMed

    Hirai, Akiko; Hirose, Yoshifumi; Gamoh, Masahiro; Satoh, Minako

    2005-10-01

    We report successful management of tracheobronchial stent insertion under general anesthesia. In thirty-two cases, tracheobronchial stent insertion was performed under general anesthesia. The technique for airway management was chosen depending on the type of stent or the constriction level of the airway portion. We employed tracheostomy in order to avoid repeated intubations during the insertion of Dumon or Dynamic stent. In case of severe airway stenosis, laser resection or balloon dilatation was performed before stent insertion. We had 32 successful cases in 36 trials. Four trials failed due to insufficient expansion in one, mismatches of stent angle in one and pneumomediastinum in one. There was no exacerbation of respiratory condition in failed cases. There was no case who needed percutaneous cardiopulmonary support system. We managed tracheobronchial stent insertion under general anesthesia. Both the airway expansion by laser resection or balloon dilatation before stent insertion and also the insertion of Dumon or Dynamic stent through a tracheostomy were helpful strategies. These techniques facilitated more definitive airway maintenance and stable anesthetic management.

  1. Successful balloon dilatation of both orifices in a case of double-orifice mitral valve with severe rheumatic stenosis.

    PubMed

    Nath, Ranjit Kumar; Soni, Dheeraj Kumar

    2016-08-01

    A 24-year-old female patient presented to us with progressive dyspnea on exertion for last three year. She was not a known case of rheumatic heart disease. Her physical examination showed regular pulse and her blood pressure was 100/76 mm Hg. Cardiac palpation showed grade 3 parasternal heave and auscultation revelled an accentuated first heart sound, loud P2 and mid-diastolic long rumbling murmur at apex and pansystolic murmur of tricuspid regurgitation at lower left sterna border. Chest X-ray showed evidence of grade 3 pulmonary venous congestion. Transthoracic and transesophageal two-dimensional echocardiography revealed a double-orifice mitral valve of complete bridge type at the leaflet level. Both orifice sizes were unequal, with the anterolateral orifice being smaller than its counterpart. There was moderate subvalvular fusion and both commisures were fused. Color doppler examination showed two separate mitral diastolic flows with mean gradients of 22 mm and 20 mm of Hg, respectively. There was no mitral regurgitation and no left atrial or appendage clot was seen by transesophageal echocardiography. Transseptal puncture was done by the modified fluoroscopic method. Posteromedial orifice was crossed with a 24 mm Inoue balloon and dilated using the stepwise dilation technique. Anterolateral orifice was not crossed by Inuoe balloon after multiple attempts. A TYSHAK (NuMAD Canada Inc.) balloon (16 × 40mm) was taken over the wire and inflated successfully across the anterolateral orifice with the help of transthoracic echocardiography guidance. Mean gradient become 9 and 8 mm across the medial and lateral orifice. Patient was discharged in stable condition after two day. © 2015 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc.

  2. Usefulness of the low profile "True 8" intra-aortic balloon pumping catheter for preventing limb lschemia.

    PubMed

    Kuki, S; Taniguchi, K; Masai, T; Yoshida, K; Yamamoto, K; Matsuda, H

    2001-01-01

    The most important limitation in the use of an intra-aortic balloon pumping (IABP) is the risk of vascular complications. Recently, an IABP catheter with an 8.0 French shaft and low profile that may decrease the risk of vascular morbidity has been developed. We evaluated the in vitro balloon performance and the prevention of limb ischemia in clinical use. An 8.0 French IABP catheter was compared with a standard 9.5 French catheter. Inflation time (IT), deflation time (DT), and changes in volume (V) generated by the balloon were measured during the pumping cycle in an experimental model. The inflation velocity (V/IT) and deflation velocity (V/DT) were calculated as parameters of balloon performance. At 120 bpm the V/IT and V/DT were 0.34 ml/msec and 0.28 ml/msec with the 8.0 French, and 0.33 ml/msec and 0.24 ml/msec with the 9.5 French catheter. Twelve patients with coronary artery disease, ranging in age from 41 to 87 years (mean, 66 years), who underwent IABP support, were divided into group 1 (8.0 French, n = 4) and group 2 (9.5 French, n = 8). Ankle-arm pressure index (API), lactate extraction ratio (LER) in the limb with IABP insertion, and cardiac index (CI) were measured at 1, 12, and 24 hours postoperatively. There were no major vascular complications and no counterpulsation related morbidity. There was no significant difference between the two groups with regard to age, duration of IABP support, and incidence of peripheral vascular disease and diabetes. The percentage of women patients was significantly higher in group 1 (100% vs. 25%), whereas body surface area was significantly smaller (1.45 +/- 0.14 vs. 1.68 +/- 0.12 m2). The API in group 1 were slightly higher than those in group 2 throughout the observed period (not significant). The LER and Cl showed no significant differences between the two groups. These results suggest that the 8.0 French IABP catheter with a low profile has an acceptable in vitro performance, and its clinical application may be

  3. Palliative balloon dilation of pulmonic stenosis in a dog with tetralogy of Fallot.

    PubMed

    Weder, C; Ames, M; Kellihan, H; Bright, J; Orton, C

    2016-09-01

    A 6-month-old Beagle with tetralogy of Fallot underwent balloon valvuloplasty of the pulmonary valve. Balloon valvuloplasty was successful and resulted in palliation of clinical signs and an improved quality of life for approximately 9 months. After 9 months, the dog became symptomatic and a modified Blalock-Taussig shunt procedure was successfully performed. Based on this report, balloon valvuloplasty in dogs with tetralogy of Fallot appears to be a feasible technique that may result in improvement of clinical signs. In addition, it may allow for the delay of the more invasive surgical palliation and provide time for weight gain and development of the pulmonary vascular bed for greater ease of surgical shunt creation. Copyright © 2016 Elsevier B.V. All rights reserved.

  4. Retrograde non trans-septal balloon mitral valvotomy in mitral stenosis with interrupted inferior vena cava, left superior vena cava, and hugely dilated coronary sinus.

    PubMed

    Nath, Ranjit Kumar; Soni, Dheeraj Kumar

    2015-12-01

    A 22-year-old woman with severe mitral stenosis was referred to us for further evaluation and management. She was found to have severe mitral stenosis, severe tricuspid regurgitation with dilated right atrium and right ventricle with persistent left superior vena cava and hugely dilated coronary sinus. Valve was suitable for balloon mitral valvotomy. Cardiac catheterization showed interrupted inferior vena cava with azygos continuation to right atrium and large left superior vena cava draining to coronary sinus which was very much dilated. Right trans-jugular approach was tried for balloon mitral valvotomy, but was unsuccessful due to a very large right atrium and coronary sinus. Retrograde non trans-septal approach was used and balloon valvotomy was done successfully using a 24 mm × 40 mm TYSHAK balloon without any major complication. Reduction in the transmitral pressure gradient on cardiac catheterization data and transthoracic echocardiography confirmed successful procedure. Balloon mitral valvotomy can be done successfully in patients with the above unusual cardiac anatomy with no major procedural complications. © 2015 Wiley Periodicals, Inc.

  5. Medical Therapy Versus Balloon Sinus Dilation in Adults With Chronic Rhinosinusitis (MERLOT): 12-Month Follow-up.

    PubMed

    Stolovitzky, J Pablo; Mehendale, Neelesh; Matheny, Keith E; Brown, William J; Rieder, Anthony A; Liepert, Douglas R; Tseng, Ewen; Gould, Andrew

    2018-05-21

    Background Chronic rhinosinusitis (CRS) is a devastating disease affecting nearly 30 million people in the United States. An interim analysis of data from the present study suggested that, in patients who had previously failed medical therapy, balloon sinus dilation (BSD) plus medical management (MM) provides a significant improvement in the quality of life (QOL) at 24 weeks postprocedure compared to MM alone. Objective The primary objective of this final analysis was to evaluate the durability of treatment effects through the 52-week follow-up. Methods Adults aged 19 and older with CRS who had failed MM elected either BSD plus MM or continued MM. Patients were evaluated at 2 (BSD arm only), 12, 24, and 52 weeks posttreatment. Balloon dilations were performed either as an office-based procedure under local anesthesia or in the operating room per physicians' and patients' discretion. The primary end point was change in patient-reported QOL as measured by Chronic Sinusitis Survey (CSS) total score from baseline to the 24-week follow-up. Secondary outcomes including changes in CSS, Rhinosinusitis Disability Index (RSDI), and Sino-Nasal Outcome Test (SNOT) total and subscores, sinus medication usage, missed days of work/school, number of medical care visits, and sinus infections from baseline to the 52-week follow-up are reported here within. Results BSD led to sustained greater improvements in self-reported QOL using the CSS and RSDI total scores with a trend toward improvement in the SNOT-20 total score from baseline to the 52-week follow-up compared to continued MM. There were no changes in medication usage apart from nasal steroid usage for which the MM cohort had an increase in usage. There were no device-related serious adverse events. Conclusion The current analysis highlights the safety, effectiveness, and durability of BSD in CRS patients aged 19 and older who had previously failed MM.

  6. Effects of structural injure in the bile bacterial contamination after balloon transduodenal sphincteroplasty (papillary dilation) in dogs.

    PubMed

    Zavadinack Netto, Martin; Fagundes, Djalma José; Bandeira, César Orlando Peralta

    2006-01-01

    To evaluate, in dogs, the biliary sphincter subjected to dilation by hydrostatic balloon by the point of view of structural alterations of the papilla and the biochemestry and bacterial contamination of the bile. Twenty dogs were submitted to laparotomy, duodenotomy, and enlargement of the major duodenal papilla- GA(n=10) - with balloon of 8mm inflated with pressure of 0,5 atm, during 2 minutes or to the sham procedure - GB(n=10). Blood samples collected on times t(0 day), t(7 days) and t(28 days) were subjected to dosages of alkaline phosphatase (ALP) and gamma-glutamyltransferase (GGT) for cholestasis evaluation. The collected material from the gall bladder at the same times were registered and numbered to be submitted to culture in BHI, blood agar (rich, non-selective element) and Mac Conkey (selective element for Gram-negative bacillus. On the 28th day three fragments of the papilla were tranversally cut by the choledoc axis 3mm from the duodenal papilla and the cuts, stained with hematoxylin-eosin and Masson's tricome, were evaluated according to their inflammatory reaction. The GGT and ALP averages on the three periods in the groups A and B did not show significant differences, not being characterizes the cholestasis. The bacterian contamination was significantly higher in GA (2,19) than in GB (1,96); the contamination was lower in the initial time compared with 7 and 28 days (t0dilation or its simple manipulation leads to the bacterial contamination of the gall bladder, not associated with cholestasis. The morphologic lesions are more intense in the late phase, not associated with an eventual papilla esthenosis.

  7. Eustachian Tube Dilation via a Transtympanic Approach in 6 Cadaver Heads: A Feasibility Study.

    PubMed

    Dean, Marc; Chao, Wei-Chieh; Poe, Dennis

    2016-10-01

    The goal of this study was to evaluate the feasibility of endoscopic transtympanic balloon dilation of the cartilaginous eustachian tube. To accomplish this, transtympanic balloon dilation of the cartilaginous eustachian tube was performed on 11 eustachian tubes (6 cadaver heads). The balloon catheter was introduced and passed through the protympanic orifice of the eustachian tube transtympanically under endoscopic view and cannulated without incident in all cadavers. Computed tomography was then performed postprocedure to evaluate for inadvertent dilation of the bony eustachian tube, adverse placement of the balloon, or any bony fractures. The balloon was seen to be successfully inflated in the cartilaginous portion without damage to surrounding structures in all cases. This demonstrates that under endoscopic guidance, the protympanic orifice of the eustachian tube can be feasibly cannulated and reliably traversed, allowing for targeted dilation of the cartilaginous eustachian tube from a transtympanic approach. © American Academy of Otolaryngology—Head and Neck Surgery Foundation 2016.

  8. Long-term results from the Contura multilumen balloon breast brachytherapy catheter phase 4 registry trial.

    PubMed

    Cuttino, Laurie W; Arthur, Douglas W; Vicini, Frank; Todor, Dorin; Julian, Thomas; Mukhopadhyay, Nitai

    2014-12-01

    To describe the long-term outcomes from a completed, multi-institutional phase 4 registry trial using the Contura multilumen balloon (CMLB) breast brachytherapy catheter to deliver accelerated partial breast irradiation (APBI) in patients with early-stage breast cancer. Three hundred forty-two evaluable patients were enrolled by 23 institutions between January 2008 and February 2011. All patients received 34 Gy in 10 fractions, delivered twice daily. Rigorous target coverage and normal tissue dose constraints were observed. The median follow-up time was 36 months (range, 1-54 months). For the entire patient cohort of 342 patients, 10 patients experienced an ipsilateral breast tumor recurrence (IBTR). Eight of these IBTR were classified as true recurrences/marginal miss (TRMM), and 2 were elsewhere failures (EF). Local recurrence-free survival was 97.8% at 3 years. For the entire cohort, 88% of patients had good to excellent overall cosmesis. The overall incidence of infection was 8.5%. Symptomatic seroma was reported in only 4.4% of patients. A separate analysis was performed to determine whether improved outcomes would be observed for patients treated at high-volume centers with extensive brachytherapy experience. Three IBTR were observed in this cohort, only 1 of which was classified as a TRMM. Local recurrence-free survival at high-volume centers was 98.1% at 3 years. Overall cosmetic outcome and toxicity were superior in patients treated at high-volume centers. In these patients, 95% had good to excellent overall cosmesis. Infection was observed in only 2.9% of patients, and symptomatic seroma was reported in only 1.9%. Use of the CMLB for APBI delivery is associated with acceptable long-term local control and toxicity. Local recurrence-free survival was 97.8% at 3 years. Significant (grade 3) toxicity was uncommon, and no grade 4 toxicity was observed. Treatment at high-volume centers was associated with decreased late toxicity. Copyright © 2014 Elsevier Inc

  9. Long-Term Results From the Contura Multilumen Balloon Breast Brachytherapy Catheter Phase 4 Registry Trial

    SciTech Connect

    Cuttino, Laurie W., E-mail: lcuttino@mcvh-vcu.edu; Arthur, Douglas W.; Vicini, Frank

    2014-12-01

    Purpose: To describe the long-term outcomes from a completed, multi-institutional phase 4 registry trial using the Contura multilumen balloon (CMLB) breast brachytherapy catheter to deliver accelerated partial breast irradiation (APBI) in patients with early-stage breast cancer. Methods and Materials: Three hundred forty-two evaluable patients were enrolled by 23 institutions between January 2008 and February 2011. All patients received 34 Gy in 10 fractions, delivered twice daily. Rigorous target coverage and normal tissue dose constraints were observed. Results: The median follow-up time was 36 months (range, 1-54 months). For the entire patient cohort of 342 patients, 10 patients experienced an ipsilateral breast tumor recurrencemore » (IBTR). Eight of these IBTR were classified as true recurrences/marginal miss (TRMM), and 2 were elsewhere failures (EF). Local recurrence-free survival was 97.8% at 3 years. For the entire cohort, 88% of patients had good to excellent overall cosmesis. The overall incidence of infection was 8.5%. Symptomatic seroma was reported in only 4.4% of patients. A separate analysis was performed to determine whether improved outcomes would be observed for patients treated at high-volume centers with extensive brachytherapy experience. Three IBTR were observed in this cohort, only 1 of which was classified as a TRMM. Local recurrence-free survival at high-volume centers was 98.1% at 3 years. Overall cosmetic outcome and toxicity were superior in patients treated at high-volume centers. In these patients, 95% had good to excellent overall cosmesis. Infection was observed in only 2.9% of patients, and symptomatic seroma was reported in only 1.9%. Conclusion: Use of the CMLB for APBI delivery is associated with acceptable long-term local control and toxicity. Local recurrence-free survival was 97.8% at 3 years. Significant (grade 3) toxicity was uncommon, and no grade 4 toxicity was observed. Treatment at high-volume centers was

  10. Benefits of Balloon-Dilatable Bilateral Pulmonary Artery Banding in Patients With Hypoplastic Left Heart Syndrome and Other Complex Cardiac Anomalies.

    PubMed

    Kise, Hiroaki; Suzuki, Shoji; Hoshiai, Minako; Toda, Takako; Koizumi, Keiichi; Hasebe, Yohei; Kono, Yosuke; Honda, Yoshihiro; Kaga, Shigeaki; Sugita, Kanji

    2015-12-01

    The purpose of this study was to evaluate the potential of balloon-dilatable bilateral pulmonary artery banding (b-PAB) and its impact on the configuration of the pulmonary artery (PA). We have previously used balloon-dilatable b-PAB as first-stage palliation for patients with hypoplastic left heart syndrome (HLHS) and other complex cardiac anomalies. Two pliable tapes were placed around each branch of the PA and tightened with 7-0 polypropylene sutures in a manner that allowed for the subsequent adjustment of PA diameters. We retrospectively examined the adjustability of PA diameters by balloon dilation and the need for surgical PA angioplasty at later stages. From January 2010 to October 2013, we performed b-PAB in 8 patients, including 3 borderline cases between biventricular repair (BVR) and univentricular repair (UVR). The b-PAB procedures were performed at a median age of 6.5 days (range, 2-10 days). Balloon dilations were performed in 10 lesions in 4 patients. All of the procedures were performed safely. Two patients reached definite BVR. The remaining 6 patients underwent open palliative procedures with univentricular physiologies that resulted in 2 deaths unrelated to the initial b-PAB. In all but 1 of the patients, the PA configuration was properly maintained and did not require surgical pulmonary angioplasty. Balloon-dilatable b-PAB can be performed safely and prevents PA distortion at later stages. This technique should be considered for patients with complex cardiac anomalies if uncertainty exists regarding the optimal surgical strategy (BVR or UVR) in early infancy. © 2015, Wiley Periodicals, Inc.

  11. Balloon expandable transcatheter aortic valve implantation with or without pre-dilation of the aortic valve - rationale and design of a multicenter registry (EASE-IT).

    PubMed

    Bramlage, Peter; Strauch, Justus; Schröfel, Holger

    2014-11-18

    In patients with severe calcific aortic stenosis, balloon aortic valvuloplasty (BAV) is routinely performed in order to pre-dilate the stenosed aortic valve prior to transcatheter aortic valve implantation (TAVI). Although pre-dilation is considered to be essential for the preparation of the valve landing zone, there is no clear evidence to support its clinical value. In contrast, BAV has been suggested to be linked to several complications. Notably, while preliminary evidence has supported the feasibility and safety of TAVI without pre-dilation, larger studies directly comparing the benefit/risk profile of TAVI in the presence and absence of pre-dilation are required. Therefore, a prospective, two-armed, multicenter registry (EASE-IT) was designed to obtain essential data concerning procedural success rates, adverse events, and mortality in a large cohort of patients undergoing transapical (TA)-TAVI using the Edwards SAPIEN 3 balloon expandable heart valves with and without pre-ballooning. Data provided by EASE-IT will be used to assess the relevance of BAV during the TAVI procedure and to investigate associations between patient characteristics and outcomes. Therefore, results obtained from the EASE-IT registry could contribute to reduced rates of TAVI-associated morbidity and mortality in patients with severe, calcific aortic stenosis. ClinicalTrials.gov Identifier: NCT02127580.

  12. Minimizing bleeding complications in spinal tumor surgery with preoperative Onyx embolization via dual-lumen balloon catheter.

    PubMed

    Ladner, Travis R; He, Lucy; Lakomkin, Nikita; Davis, Brandon J; Cheng, Joseph S; Devin, Clinton J; Mocco, J

    2016-02-01

    Intraoperative bleeding is a significant risk in surgery for highly vascular spinal tumors, but preoperative embolization can safely decrease intraoperative blood loss in extrinsic spine tumors. Onyx, widely used for cerebrovascular embolization, has been increasingly used as an embolic agent for preoperative spinal tumor embolization. The Scepter catheter, a dual-lumen balloon catheter, may improve tumor parenchymal penetration without the danger and limitations of significant embolic reflux. This may reduce bleeding risk during spinal surgery. Eleven consecutive cases of preoperative Onyx embolization of extrinsic spinal tumors were identified, all of whom had subsequent spinal surgery. Demographic data and clinical variables were collected. Patients were divided into Scepter (n=6) and non-Scepter (n=5) groups. The Mann-Whitney U test was used to compare continuous outcome variables and the Fisher exact test was used to compare categorical variables. Estimated blood loss in the Scepter group was significantly lower than in the non-Scepter group (584±124 vs 2400±738 mL, p=0.004). The volume of intraoperative transfusion was also significantly lower (1.2±0.4 vs 5.8±1.7 units, p=0.004). There was no significant difference in the number of vessels embolized, vials of Onyx used, use of coiling adjunct, contrast load, radiation dose, or fluoroscopy time per pedicle (p>0.05). The addition of the Scepter catheter to preoperative Onyx embolization is safe and feasible. In this small series, the Scepter catheter was associated with a reduction of intraoperative bleeding by 76% and a 79% lower transfusion volume. This was not accompanied by any unwanted increase in vials of Onyx used, contrast load, radiation dose, or fluoroscopy time. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

  13. Feasibility and Safety of Distal and Proximal Combined Endovascular Approach with a Balloon-Guiding Catheter for Subclavian Artery Total Occlusion.

    PubMed

    Yamamoto, Taiki; Ohshima, Tomotaka; Ishikawa, Kojiro; Goto, Shunsaku; Tamari, Yosuke

    2017-04-01

    Symptomatic subclavian artery total occlusion is widely treated with an endovascular procedure that often results in distal vertebral artery embolism. Therefore, protection devices are important. Establishing a filter or balloon device in the vertebral artery can protect against this distal embolism. However, the use of embolic protection devices is not easy, and it makes the procedure more complicated. Here, we report a case of symptomatic subclavian artery total occlusion that was treated successfully with a balloon-guiding catheter and the pull-through technique. A 67-year-old man developed intermittent motor weakness in his left arm. Aortic angiography demonstrated a complete occlusion of the left proximal subclavian artery and a retrograde flow through the left vertebral artery to the distal brachial artery. In this case, we used a balloon-guiding catheter and the pull-through technique to prevent distal embolism. The balloon-guiding system was useful not only for embolic protection but also for scaffold during excavation and for the centering effect against invisible vessels. The pull-through technique enabled our devices to deliver easily and smoothly. The patient was treated successfully without complications. The distal and proximal combined endovascular treatment with a transbrachial balloon-guiding catheter is a beneficial treatment option for patients with subclavian artery total occlusion. Copyright © 2017 Elsevier Inc. All rights reserved.

  14. Laser-driven short-duration heating angioplasty: dilatation performance in cadaver atherosclerotic femoral arteries

    NASA Astrophysics Data System (ADS)

    Shimazaki, Natsumi; Naruse, Sho; Arai, Tsunenori; Imanishi, Nobuaki; Aiso, Sadakazu

    2013-03-01

    The purpose of this study was to investigate the artery dilatation performance of the short-duration heating balloon catheter in cadaver stenotic arteries. We designed a prototype short-duration heating balloon catheter that can heat artery media to around 60 °C in 15-25 s by a combination of laser-driven heat generation and continuous fluid irrigation in the balloon. We performed ex vivo short-duration heating dilatation in the cadaver atherosclerotic femoral arteries (initial percent diameter stenosis was 36-98%), with the maximum balloon temperature of 65+/-5 °C, laser irradiation duration of 25 s, and balloon dilatation pressure of 3.5 atm. The artery lumen configurations before and after the dilatations were assessed with a commercial IVUS system. After the short-duration heating dilatations, the percent diameter stenosis was reduced below 30% without any artery tears or dissections. We estimated that the artery media temperature was raised to around 60 °C in which plaque thickness was below 0.8 mm by a thermal conduction calculation. The estimated maximum temperature in artery adventitia and surrounding tissue was up to 45 °C. We found that the short-duration heating balloon could sufficiently dilate the cadaver stenotic arteries, without thermal injury in artery adventitia and surroundings.

  15. Biodegradable stent or balloon dilatation for benign oesophageal stricture: pilot randomised controlled trial.

    PubMed

    Dhar, Anjan; Close, Helen; Viswanath, Yirupaiahgari K; Rees, Colin J; Hancock, Helen C; Dwarakanath, A Deepak; Maier, Rebecca H; Wilson, Douglas; Mason, James M

    2014-12-28

    To undertake a randomised pilot study comparing biodegradable stents and endoscopic dilatation in patients with strictures. This British multi-site study recruited seventeen symptomatic adult patients with refractory strictures. Patients were randomised using a multicentre, blinded assessor design, comparing a biodegradable stent (BS) with endoscopic dilatation (ED). The primary endpoint was the average dysphagia score during the first 6 mo. Secondary endpoints included repeat endoscopic procedures, quality of life, and adverse events. Secondary analysis included follow-up to 12 mo. Sensitivity analyses explored alternative estimation methods for dysphagia and multiple imputation of missing values. Nonparametric tests were used. Although both groups improved, the average dysphagia scores for patients receiving stents were higher after 6 mo: BS-ED 1.17 (95%CI: 0.63-1.78) P = 0.029. The finding was robust under different estimation methods. Use of additional endoscopic procedures and quality of life (QALY) estimates were similar for BS and ED patients at 6 and 12 mo. Concomitant use of gastrointestinal prescribed medication was greater in the stent group (BS 5.1, ED 2.0 prescriptions; P < 0.001), as were related adverse events (BS 1.4, ED 0.0 events; P = 0.024). Groups were comparable at baseline and findings were statistically significant but numbers were small due to under-recruitment. The oesophageal tract has somatic sensitivity and the process of the stent dissolving, possibly unevenly, might promote discomfort or reflux. Stenting was associated with greater dysphagia, co-medication and adverse events. Rigorously conducted and adequately powered trials are needed before widespread adoption of this technology.

  16. Biodegradable stent or balloon dilatation for benign oesophageal stricture: Pilot randomised controlled trial

    PubMed Central

    Dhar, Anjan; Close, Helen; Viswanath, Yirupaiahgari K; Rees, Colin J; Hancock, Helen C; Dwarakanath, A Deepak; Maier, Rebecca H; Wilson, Douglas; Mason, James M

    2014-01-01

    AIM: To undertake a randomised pilot study comparing biodegradable stents and endoscopic dilatation in patients with strictures. METHODS: This British multi-site study recruited seventeen symptomatic adult patients with refractory strictures. Patients were randomised using a multicentre, blinded assessor design, comparing a biodegradable stent (BS) with endoscopic dilatation (ED). The primary endpoint was the average dysphagia score during the first 6 mo. Secondary endpoints included repeat endoscopic procedures, quality of life, and adverse events. Secondary analysis included follow-up to 12 mo. Sensitivity analyses explored alternative estimation methods for dysphagia and multiple imputation of missing values. Nonparametric tests were used. RESULTS: Although both groups improved, the average dysphagia scores for patients receiving stents were higher after 6 mo: BS-ED 1.17 (95%CI: 0.63-1.78) P = 0.029. The finding was robust under different estimation methods. Use of additional endoscopic procedures and quality of life (QALY) estimates were similar for BS and ED patients at 6 and 12 mo. Concomitant use of gastrointestinal prescribed medication was greater in the stent group (BS 5.1, ED 2.0 prescriptions; P < 0.001), as were related adverse events (BS 1.4, ED 0.0 events; P = 0.024). Groups were comparable at baseline and findings were statistically significant but numbers were small due to under-recruitment. The oesophageal tract has somatic sensitivity and the process of the stent dissolving, possibly unevenly, might promote discomfort or reflux. CONCLUSION: Stenting was associated with greater dysphagia, co-medication and adverse events. Rigorously conducted and adequately powered trials are needed before widespread adoption of this technology. PMID:25561787

  17. Balloon dilation of the esophago-gastric junction affects lower and upper esophageal sphincter function in achalasia.

    PubMed

    Wauters, L; Van Oudenhove, L; Selleslagh, M; Vanuytsel, T; Boeckxstaens, G; Tack, J; Omari, T; Rommel, N

    2014-01-01

    Pneumatic dilation of the lower esophageal sphincter (LES) in achalasia has an unappreciated effect on upper esophageal sphincter (UES) function. We studied UES pressure patterns at baseline and alterations in UES parameters resulting from therapy. High-resolution manometry (HRM) tracings from 50 achalasia patients, seen at a tertiary center between January 2009 and July 2011, were reviewed. Manometric parameters studied were (i) LES: resting pressure (restP), 4-second integrated relaxation pressure (IRP4); (ii) UES: resting pressure (restP), minimal relaxation pressure (MRP), peak pressure (PP), relaxation interval (RI), intrabolus pressure (IBP), and deglutitive sphincter resistance (DSR). Mixed models analyses with LES and UES parameters as dependent variables and treatment stage as within-subject independent variable of interest were used. Correlations between treatment-induced changes in LES, UES, and esophageal body (EB) parameters were performed. Pre- and posttreatment HRM tracings were available from 50 patients (mean age 52.7 ± 18.6 years, 29 men). Upper esophageal sphincter parameters MRP (17.9 ± 1.2 vs 15.2 ± 0.9 mmHg; p = 0.02) and IBP (31.5 ± 1.5 vs 27.4 ± 1.2 mmHg; p = 0.009) were significantly reduced after initial balloon dilation and this effect was significant in type II achalasia (p = 0.002 and p = 0.0006). Peak pressure, RI, and DSR were not. The therapeutic effect on LES IRP4 correlated significantly with the change in UES MRP, statistically mediated by the change in EB deglutitive pressure (p = 0.004 and p = 0.0002). We present the first HRM study demonstrating that pneumatic dilation of the LES affects intraesophageal and UES pressures in patients with achalasia. © 2013 John Wiley & Sons Ltd.

  18. Influence of Contrast Agent Dilution on Ballon Deflation Time and Visibility During Tracheal Balloon Dilation: A 3D Printed Phantom Study

    SciTech Connect

    Kim, Min Tae; Park, Jung-Hoon; Shin, Ji Hoon, E-mail: jhshin@amc.seoul.kr

    PurposeTo determine the effect of contrast medium dilution during tracheal balloon dilation on balloon deflation time and visibility using a 3-dimensional (3D) printed airway phantom.Materials and MethodsA comparison study to investigate balloon deflation times and image quality was performed using two contrast agents with different viscosities, i.e., iohexol and ioxithalamate, and six contrast dilutions with a 3D printed airway phantom.ResultsCompared to 1:0 concentration, 3:1, 2:1, 1:1, 1:2, and 1:3, contrast/saline ratios resulted in a 46% (56.2 s), 59.8% (73.1 s), 74.9% (91.6 s), 81.7% (99.8 s), and 83.5% (102 s) reduction for iohexol, respectively, and a 51.8% (54.7 s), 63.8% (67.6 s), 74.7% (79.2 s), 80.5% (85.3 s), andmore » 82.4% (87.4 s) reduction for ioxithalamate, respectively, in the mean balloon deflation time, although at the expense of decreased balloon opacity (3.5, 6.9, 11.1, 12.4, and 13.9%, for iohexol, respectively, and 3.2, 6, 9.6, 10.8, and 12.4%, for ioxithalamate, respectively).ConclusionsUse of a lower viscosity contrast agent and higher contrast dilution is considered to be able to reduce balloon deflation times and then simultaneously decrease visualization of balloons. The rapid balloon deflation time is likely to improve the safe performance of interventional procedures.« less

  19. A Stent-Retrieving into an Aspiration Catheter with Proximal Balloon (ASAP) Technique: A Technique of Mechanical Thrombectomy.

    PubMed

    Goto, Shunsaku; Ohshima, Tomotaka; Ishikawa, Kojiro; Yamamoto, Taiki; Shimato, Shinji; Nishizawa, Toshihisa; Kato, Kyozo

    2018-01-01

    The best technique for the first attempt at mechanical thrombectomy for acute ischemic stroke is a still matter of debate. In this study, we evaluate the efficacy of a stent-retrieving into an aspiration catheter with proximal balloon (ASAP) technique that uses a series of thrombus extraction by withdrawing the stent retriever into the aspiration catheter and continuous aspiration from the aspiration catheter at the first attempt. We performed a retrospective analysis of 42 consecutive patients with acute ischemic stroke caused by occlusions in the anterior circulation who were treated with the ASAP technique at our institution. Preoperative patient characteristic, including age, thrombus location, Alberta Stroke Program Early CT Score, National Institutions of Health Stroke Scale, and time from onset to puncture; postoperative Thrombolysis in Cerebral Infarction score; modified Rankin Scale score after 3 months; time from puncture to recanalization; the number of passes to achieve recanalization; and procedural complications, including intracranial hemorrhage, embolization to new territory, and distal embolization, were assessed. A Thrombolysis in Cerebral Infarction score of 2B or 3 was achieved in 40/42 patients (95.2%). Average time from puncture to the final recanalization was 21.5 minutes. Recanalization was achieved in a single attempt in 31 patients (77.5%). Embolization to new territory was observed in only 2 patients (4.8%); no patient developed distal embolization or intracranial hemorrhage including asymptomatic subarachnoid hemorrhage. Thirty-two patients (76.2%) achieved modified Rankin Scale scores of 0-2 at 3 months postoperatively. Our ASAP technique showed fast recanalization, minimal complications, and good clinical outcomes in this case series. Copyright © 2017 Elsevier Inc. All rights reserved.

  20. Initial experience with dual-lumen balloon catheter injection for preoperative Onyx embolization of skull base paragangliomas.

    PubMed

    Ladner, Travis R; He, Lucy; Davis, Brandon J; Yang, George L; Wanna, George B; Mocco, J

    2016-06-01

    OBJECT Paragangliomas are highly vascular head and neck tumors for which preoperative embolization is often considered to facilitate resection. The authors evaluated their initial experience using a dual-lumen balloon to facilitate preoperative embolization in 5 consecutive patients who underwent preoperative transarterial Onyx embolization assisted by the Scepter dual-lumen balloon catheter between 2012 and 2014. OBJECT The authors reviewed the demographic and clinical records of 5 patients who underwent Scepter-assisted Onyx embolization of a paraganglioma followed by resection between 2012 and 2014. Descriptive statistics of clinical outcomes were assessed. RESULTS Five patients (4 with a jugular and 1 with a vagal paraganglioma) were identified. Three paragangliomas were embolized in a single session, and each of the other 2 were completed in 3 staged sessions. The mean volume of Onyx used was 14.3 ml (range 6-30 ml). Twenty-seven vessels were selectively catheterized for embolization. All patients required selective embolization via multiple vessels. Two patients required sacrifice of parent vessels (1 petrocavernous internal carotid artery and 1 vertebral artery) after successful balloon test occlusion. One patient underwent embolization with Onyx-18 alone, 2 with Onyx-34 alone, and 1 with Onyx-18 and -34. In each case, migration of Onyx was achieved within the tumor parenchyma. The mean time between embolization and resection was 3.8 days (range 1-8 days). Gross-total resection was achieved in 3 (60%) patients, and the other 2 patients had minimal residual tumor. The mean estimated blood loss during the resections was 556 ml (range 200-850 ml). The mean postoperative hematocrit level change was -17.3%. Two patients required blood transfusions. One patient, who underwent extensive tumor penetration with Onyx, developed a temporary partial cranial nerve VII palsy that resolved to House-Brackmann Grade I (out of VI) at the 6-month follow-up. One patient

  1. Percutaneous balloon pulmonary valvuloplasty (PBPV) of extreme pulmonary valve stenosis by the use of Accura balloon.

    PubMed

    Sinha, Santosh Kumar; Mishra, Vikas; Razi, Mahmadula; Jha, Mukesh Jitendra

    2017-10-04

    Transcatheter therapy of valvular pulmonary stenosis is one of first catheter interventions facilitating its application in field of structural heart disease and now treatment of choice for significant pulmonary stenosis. Myriads of balloon catheter have been used for this purpose starting from Diamond (Boston Scientific,Natick, MA USA), Marshal (Medi-Tech,Watertown MAUSA), Innoue balloon, Tyshak I and currently Tyshak II. Diameter and length of balloon depend on size of annulus and age group, respectively. Problem with shorter balloon is difficulty in keeping it across the annulus while inflation as it tends to slip distally whereas with longer balloon, potential of tricuspid leak or conduction block as it may impinge on adjacent structures. Potential advantage of Accura balloon over Tyshak balloon lies in its peculiar shape while inflation and variable diameter, making stepwise dilatation possible. Here, we report a case of successful balloon pulmonary valvuloplasty using Accura balloon (Vascular Concept, UK) with little modification of conventional technique. © BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  2. [Obstruction of the nasal passage caused by a balloon catheter in a calf].

    PubMed

    Rijkenhuizen, A B

    1993-01-01

    Decompression of the rumen as a supporting symptomatic therapy of recurrent bloat in calves and juvenile cattle is used regularly. The gas should be released for several days. This is facilitated by the use of a balloon stomach tube, which can be left in situ for up to five days. However, the use of this tube is not always without risks, which will be discussed on base of a patient.

  3. Amiodarone and Catheter Ablation as Cardiac Resynchronization Therapy for Children with Dilated Cardiomyopathy and Wolff-Parkinson-White Syndrome

    PubMed Central

    Kim, Sung Hoon; Jeong, Soo In; Kang, I-Seok; Lee, Heung Jae

    2013-01-01

    Preexcitation by accessory pathways (APs) is known to cause dyssynchrony of the ventricle, related to ventricular dysfunction. Correction of ventricular dyssynchrony can improve heart failure in cases of dilated cardiomyopathy (DCMP) with preexcitation. Here, we report the first case of a child with DCMP and Wolff-Parkinson-White (WPW) syndrome treated with amiodarone and radiofrequency catheter ablation (RFCA) in Korea. A 7-year-old boy, who suffered from DCMP and WPW syndrome, showed improved left ventricular function and clinical functional class after treatment with amiodarone to eliminate preexcitation. QRS duration and left ventricular ejection fraction (LVEF) were inversely correlated with amiodarone dosage. After confirming the reduction of preexcitation effects in DCMP, successful RFCA of the right anterior AP resulted in LVEF improvement, along with the disappearance of preexcitation. Our findings suggest that ventricular dyssynchrony, caused by preexcitation in DCMP with WPW syndrome, can worsen ventricular function and amiodarone, as well as RFCA, which should be considered as a treatment option, even in young children. PMID:23407697

  4. Management of late biliary complications in patients with gallbladder stones in situ after endoscopic papillary balloon dilation.

    PubMed

    Tsujino, Takeshi; Kawabe, Takao; Isayama, Hiroyuki; Yashima, Yoko; Yagioka, Hiroshi; Kogure, Hirofumi; Sasaki, Takashi; Arizumi, Toshihiko; Togawa, Osamu; Ito, Yukiko; Matsubara, Saburo; Nakai, Yousuke; Sasashira, Naoki; Hirano, Kenji; Tada, Minoru; Omata, Masao

    2009-04-01

    Patients with untreated gallbladder stones in situ are at high risk for late biliary complications after endoscopic papillary balloon dilation (EPBD) and bile duct stone extraction. Few data exist on the short-term and long-term results in these patients after the recurrence of bile duct stones and acute cholecystitis. The aim of this study was to evaluate the outcome of late biliary complications in patients with gallbladder stones in situ after EPBD. Fifty-six patients who developed late biliary complications, including bile duct stone recurrence (n=43) and acute cholecystitis (n=13), were managed at our institutions. We investigated the short-term and long-term outcomes after the management of late biliary complications. Complete removal of recurrent bile duct stones was achieved in 38 of 43 patients (88%) by repeated EPBD alone. Pancreatitis after repeated EPBD occurred in two patients (5%). After successful bile duct stone extraction by EPBD, none of the 16 patients who underwent cholecystectomy developed late biliary complications (mean follow-up period of 5.2 years), wheras re-recurrent bile duct stones occurred in three of the 21 patients (14%) with gallbladder stones left in situ (mean follow-up period of 4.4 years)(P=0.1148). Re-recurrent bile duct stones were successfully treated endoscopically. One of the eight patients who did not undergo cholecystectomy for acute cholecystitis had a recurrence of cholecystitis, which was managed conservatively. The long-term outcomes of late biliary complications are favorable when patients with concomitant gallbladder stones undergo cholecystectomy. Re-recurrent bile duct stones are considerable when gallbladder stones are left in situ, but should be treated endoscopically.

  5. Management of late biliary complications in patients with gallbladder stones in situ after endoscopic papillary balloon dilation.

    PubMed

    Tsujino, Takeshi; Kawabe, Takao; Isayama, Hiroyuki; Yashima, Yoko; Yagioka, Hiroshi; Kogure, Hirofumi; Sasaki, Takashi; Arizumi, Toshihiko; Togawa, Osamu; Ito, Yukiko; Matsubara, Saburo; Nakai, Yousuke; Sasashira, Naoki; Hirano, Kenji; Tada, Minoru; Omata, Masao

    2009-04-01

    Patients with untreated gallbladder stones in situ are at high risk for late biliary complications after endoscopic papillary balloon dilation (EPBD) and bile duct stone extraction. Few data exist on the short-term and long-term results in these patients after the recurrence of bile duct stones and acute cholecystitis. The aim of this study was to evaluate the outcome of late biliary complications in patients with gallbladder stones in situ after EPBD. Fifty-six patients who developed late biliary complications, including bile duct stone recurrence (n=43) and acute cholecystitis (n=13), were managed at our institutions. We investigated the short-term and long-term outcomes after the management of late biliary complications. Complete removal of recurrent bile duct stones was achieved in 38 of 43 patients (88%) by repeated EPBD alone. Pancreatitis after repeated EPBD occurred in two patients (5%). After successful bile duct stone extraction by EPBD, none of the 16 patients who underwent cholecystectomy developed late biliary complications (mean follow-up period of 5.2 years), whereas re-recurrent bile duct stones occurred in three of the 21 patients (14%) with gallbladder stones left in situ (mean follow-up period of 4.4 years)(P=0.1148). Re-recurrent bile duct stones were successfully treated endoscopically. One of the eight patients who did not undergo cholecystectomy for acute cholecystitis had a recurrence of cholecystitis, which was managed conservatively. The long-term outcomes of late biliary complications are favorable when patients with concomitant gallbladder stones undergo cholecystectomy. Re-recurrent bile duct stones are considerable when gallbladder stones are left in situ, but should be treated endoscopically.

  6. Assessment of Pneumatic Balloon Dilation in Patients with Symptomatic Relapse after Failed Heller Myotomy: A Single Center Experience.

    PubMed

    Amani, Mohammad; Fazlollahi, Narges; Shirani, Shapour; Malekzadeh, Reza; Mikaeli, Javad

    2016-01-01

    BACKGROUND Although Heller myotomy is one of the most effective treatments for achalasia, it may be associated with early or late symptom relapse in some patients. Therefore, additional treatment is required to achieve better control of symptoms. To evaluate the safety and efficacy of pneumatic balloon dilation (PBD) in patients with symptom relapse after Heller myotomy. METHODS Thirty six post-myotomy patients were evaluated from 1993 to 2013. Six patients were excluded from the analysis because of comorbid diseases or epiphrenic diverticula. Thirty patients were treated with PBD. Primary outcome was defined as a decrease in symptom score to 4 or less and a reduction greater than 80% from the baseline in the volume of barium in timed barium esophagogram in 6 weeks. Achalasia symptom score (ASS) was assessed at 1.5, 3, 6, and 12 months after treatment and then every six months in all patients and PBD was repeated in case of symptom relapse (ASS>4). RESULTS The mean age of the patients was 45.5±13.9 years (range: 21-73). Primary outcome was observed in 25 patients (83%). The mean ASS of the patients dropped from 7.8 before treatment to 1.3±2.0 at 1.5 months after treatment (p=0.0001). The mean volume and height of barium decreased from 43.1±33.4 and 7.1±4.7 to 6.0±17.1 and 1.1±2.2, respectively (p=0.003, p=0.003). The mean duration of follow-up was 11.8±6.3 years. At the end of the study, 21 patients (70%) reported sustained good response. No major complications such as perforation or gross bleeding were seen. CONCLUSION PBD is an effective and safe treatment option for achalasia in patients with symptom relapse after Heller myotomy.

  7. Optimal application of the Contura multilumen balloon breast brachytherapy catheter vacuum port to deliver accelerated partial breast irradiation.

    PubMed

    Tokita, Kenneth M; Cuttino, Laurie W; Vicini, Frank A; Arthur, Douglas W; Todor, Dorin A; Julian, Thomas B; Lyden, Maureen R

    2011-01-01

    The impact of using the Contura multilumen balloon (MLB) (SenoRx, Inc., Irvine, CA) breast brachytherapy catheter's vacuum port in patients treated with accelerated partial breast irradiation (APBI) was analyzed. Data from 32 patients at two sites were reviewed. Variables analyzed included the seroma fluid (SF):air volume around the MLB before and after vacuum port use and on its ability to improve (1) the eligibility of patients for APBI and (2) dose coverage of the planning target volume for evaluation (PTV_EVAL) in eligible patients. The median SF/air volume before vacuum removal was 6.8 cc vs. 0.8 cc after vacuum removal (median reduction in SF/air volume was 90.5%). Before vacuum port use, the median SF/air volume expressed as percentage of the PTV_EVAL was 7.8% (range, 1.9-26.6) in all patients. After application of the vacuum, this was reduced to 1.2%. Before vacuum port use, 10 (31.3%) patients were not considered acceptable candidates for APBI because the SF/air volume:PTV_EVAL ratio (SF:PTV) was greater than 10% (range, 10.1-26.6%; median, 15.2%). After vacuum port use, the median SF:PTV ratio was 1.6% for a median reduction of 91.5%. In addition, the percentage of the prescribed dose covering greater than or equal to 90% of the PTV_EVAL proportionally increased a median of 8% (range, 3-10%) in eligible patients. Use of the Contura MLB vacuum port significantly improved the conformity of the target tissue to the balloon surface, leading to reproducible dose delivery and increased target volume coverage. In addition, application of the vacuum allowed the safe treatment of unacceptable patients with APBI. Copyright © 2011 American Brachytherapy Society. Published by Elsevier Inc. All rights reserved.

  8. Massive gross hematuria in a sickle cell trait patient with renal papillary necrosis. Conservative approach using a balloon ureteral catheter to tamponade the papilla bleeding.

    PubMed

    Herard, A; Colin, J; Youinou, Y; Drancourt, E; Brandt, B

    1998-08-01

    We report the case of a patient with heterozygous sickle cell trait presenting with massive gross hematuria. Ureteroscopy revealed bleeding from the tip of papilla of the inferior calica and allowed us to tamponade the bleeding with a balloon ureteral dilator set (Cook(R) Urology). We show the value of the endourological approach in the conservative management of these patients at high risk of recurrent hematuria.

  9. Paclitaxel-Coated Balloon in Infrapopliteal Arteries: 12-Month Results From the BIOLUX P-II Randomized Trial (BIOTRONIK'S-First in Man study of the Passeo-18 LUX drug releasing PTA Balloon Catheter vs. the uncoated Passeo-18 PTA balloon catheter in subjects requiring revascularization of infrapopliteal arteries).

    PubMed

    Zeller, Thomas; Beschorner, Ulrich; Pilger, Ernst; Bosiers, Marc; Deloose, Koen; Peeters, Patrick; Scheinert, Dierk; Schulte, Karl-Ludwig; Rastan, Aljoscha; Brodmann, Marianne

    2015-10-01

    The aim of BIOLUX P-II (BIOTRONIK'S-First in Man study of the Passeo-18 LUX drug releasing PTA Balloon Catheter vs. the uncoated Passeo-18 PTA balloon catheter in subjects requiring revascularization of infrapopliteal arteries) trial was to compare the safety and efficacy of a novel paclitaxel-coated drug-eluting balloon (DEB) versus an uncoated balloon (percutaneous transluminal angioplasty [PTA]) in de novo or native restenotic lesions of the infrapopliteal arteries in patients with claudication and critical limb ischemia. DEB have shown promising results in femoropopliteal lesions, but data for infrapopliteal lesions are scarce. In this prospective, multicenter, randomized first-in-man study, 72 patients were randomized 1:1 to either a Passeo-18 Lux DEB (Biotronik AG, Buelach, Switzerland) (n = 36) or Passeo-18 PTA (n = 36). Follow-up assessments were scheduled at 1, 6, and 12 months, with angiographic assessment at 6 months. Adverse events were adjudicated by an independent clinical events committee, and angiographic parameters were assessed by an independent core laboratory. The primary safety endpoint (a composite of all-cause mortality, target extremity major amputation, target lesion thrombosis, and target vessel revascularization at 30 days) was 0% in the DEB group versus 8.3% in the PTA group (p = 0.239). The primary performance endpoint (patency loss at 6 months) was 17.1% in the DEB group versus 26.1% in the PTA group (p = 0.298), and major amputations of the target extremity occurred in 3.3% versus 5.6% of the patients at 12 months, respectively. The Passeo-18 Lux DEB has been proven to be safe and effective in infrapopliteal lesions with comparable outcomes to PTA. Copyright © 2015 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.

  10. Radiofrequency catheter ablation versus balloon cryoablation of atrial fibrillation: markers of myocardial damage, inflammation, and thrombogenesis.

    PubMed

    Antolič, Bor; Pernat, Andrej; Cvijić, Marta; Žižek, David; Jan, Matevž; Šinkovec, Matjaž

    2016-07-01

    Evidence from animal and human studies suggests that cryoablation might be associated with a lesser inflammatory response and activation of coagulation compared with radiofrequency ablation. The study was aimed at comparing the effect of cryoballoon and radiofrequency catheter ablation of paroxysmal atrial fibrillation on markers of myocardial damage, inflammation, and activation of coagulation. Forty-one patients received either cryoballoon (n = 23) or radiofrequency (n = 18) ablation of atrial fibrillation. We measured troponin I, high-sensitivity CRP, and interleukin 6 at baseline from the cubital vein, and from the right and left atrium before and after ablation, and from the cubital vein the following day. Prothrombin fragments 1 + 2, soluble P‑selectin, and D‑dimer were measured before and after ablation from both atria. We observed higher troponin I release in the cryoballoon than in the radiofrequency group (7.01 mcg/l (interquartile range [IQR]: 5.30-9.09) vs 2.32 mcg/l (IQR: 1.45-2.98), p < 0.001). The levels of inflammatory markers (high-sensitivity CRP and interleukin 6) in the two groups were comparable, as were the levels of markers of coagulation activation. Procedure duration, fluoroscopy times, and mid-term success (23 months, IQR 7-32) of the two groups were also comparable. Cryoballoon ablation of atrial fibrillation causes more significant myocardial damage, that is, more extensive ablation lesions, compared with radiofrequency catheter ablation. However, no major differences between these two ablation techniques with regard to the inflammatory response and activation of the coagulation system were observed.

  11. Comparison between traditional and small-diameter tube-assisted bronchoscopic balloon dilatation in the treatment of benign tracheal stenosis.

    PubMed

    Li, Li-Hua; Liang, Yi-Lin; Li, Yu; Xu, Ming-Peng; Li, Wen-Tao; Liu, Guang-Nan

    2018-03-01

    To compare the safety and efficacy between using a small-diameter tube-assisted bronchoscopic balloon dilatation (BBD) and the traditional BBD in the treatment of benign tracheal stenosis. A retrospective study included 58 patients with benign tracheal stenosis from August 2009 to December 2014 was made. The patients who underwent traditional BBD were divided into group A, and who underwent a small-diameter tube-assisted BBD were divided into group B. The tracheal diameter, dyspnea index and blood gas analysis results were detected before and after BBD. Efficacy and complications were evaluated after BBD. There were significant differences in oxygen saturation (PaO 2 ) during the operations comparing with before and after operations in group A (P = .005), while there was no significant difference in group B (P = .079). The tracheal diameter obviously increased (in group A, from 4.16 ± 1.43 mm to 12.47 ± 1.41 mm, P = .000; in group B: from 4.94 ± 1.59 mm to 12.61 ± 1.41 mm, P = .000). Dyspnea index obviously decreased (group A: from 3.21 ± 0.93 to 0.50 ± 0.59, P = .000; group B: from 3.24 ± 0.89 to 0.65 ± 0.69, P = .000). The immediately cure rate in both groups was 100%. Long-term effect was significantly better in group B than that in group A (85.3% vs 59.1%, P = .021), at the end of the follow-up period. Small-diameter tube-assisted BBD obtains better safety and long-term efficacy than the traditional BBD in the treatment of benign tracheal stenosis. However, close attention should be given to the risk of the adverse effects caused by carbon dioxide retention. © 2017 John Wiley & Sons Ltd.

  12. Percutaneous intraportal application of adipose tissue-derived mesenchymal stem cells using a balloon occlusion catheter in a porcine model of liver fibrosis.

    PubMed

    Avritscher, Rony; Abdelsalam, Mohamed E; Javadi, Sanaz; Ensor, Joe; Wallace, Michael J; Alt, Eckhard; Madoff, David C; Vykoukal, Jody V

    2013-12-01

    To investigate the safety and effectiveness of a novel endovascular approach for therapeutic cell delivery using a balloon occlusion catheter in a large animal model of liver fibrosis. Transcatheter arterial embolization with ethiodized oil (Ethiodol) and ethanol was used to induce liver damage in 11 pigs. Mesenchymal stem cells (MSCs) were harvested from adipose tissue and engineered to express green fluorescent protein (GFP). A balloon occlusion catheter was positioned in the bilateral first-order portal vein branches 2 weeks after embolization to allow intraportal application of MSCs in six experimental animals. MSCs were allowed to dwell for 10 minutes using prolonged balloon inflation. Five control animals received a sham injection of normal saline in a similar fashion. Hepatic venous pressure gradient (HVPG) was measured immediately before necropsy. Specimens from all accessible lobes were obtained with ultrasound-guided percutaneous 18-gauge biopsy 2 hours after cell application. All animals were euthanized within 4 weeks. Fluorescent microscopy was used to assess the presence and distribution of cells. Liver injury and fibrosis were successfully induced in all animals. MSCs (6-10 × 10(7)) were successfully delivered into the portal vein in the six experimental animals. Cell application was not associated with vascular complications. HVPG showed no instances of portal hypertension. GFP-expressing MSCs were visualized in biopsy specimens and were distributed primarily within the sinusoidal spaces; however, 4 weeks after implantation, MSCs could not be identified in histologic specimens. A percutaneous endovascular approach for cell delivery using a balloon occlusion catheter proved safe for intraportal MSC application in a large animal model of liver fibrosis. © 2013 SIR Published by SIR All rights reserved.

  13. Postoperative vesicoureteral reflux after high-pressure balloon dilation of the ureterovesical junction in primary obstructive megaureter. Incidence, management and predisposing factors.

    PubMed

    García-Aparicio, Luis; Blázquez-Gómez, Eva; de Haro, Irene; Garcia-Smith, Natalie; Bejarano, Miguel; Martin, Oriol; Rodo, Joan

    2015-12-01

    To describe the incidence, predisposing factors and management of postoperative vesicoureteral reflux (VUR) after high-pressure balloon dilation to treat primary obstructive megaureter (POM). We have reviewed patients that underwent endoscopic treatment for POM from May 2008 to November 2013. All patients were evaluated with renal ultrasound, voiding cystourethrography and diuretic renogram. Endoscopic treatment was done with high-pressure balloon dilation of the ureterovesical junction under general anesthesia; a double-J stenting was done in all patients. Follow-up was performed with ultrasonography, voiding cystourethrography and a diuretic renogram in all patients. Fifteen boys and five girls with a mean age of 14.18 months (3-103) were reviewed. A total of 22 ureters underwent HPBD to treat POM. Ureterohydronephrosis improves in 19 ureters. After endoscopic treatment, six ureters developed VUR. Four ureters were managed surgically, and in the other two, VUR disappeared in a second cystogram. The presence of parameatal diverticulum in the preoperative cystography and those patients with bilateral POM are factors related to postoperative VUR (p < 0.05). Urinary tract infection after HPBD was observed in four patients, but only one of them was affected with VUR.

  14. Renal access in PNL under sonographic guidance: Do we really need to insert an open end ureteral catheter in dilated renal systems? A prospective randomized study.

    PubMed

    Eryildirim, Bilal; Tuncer, Murat; Camur, Emre; Ustun, Fatih; Tarhan, Fatih; Sarica, Kemal

    2017-10-03

    To evaluate the true necessity of open end ureteral catheter insertion in patients with moderate to severe pelvicalyceal system dilation treated with percutaneous nephrolithotomy (PNL) under sonographic guidance. 50 cases treated with PNL under sonographic guidance in prone position for solitary obstructing renal stones were evaluated. Patients were randomly divided into two groups; Group 1: Patients in whom a open end ureteral catheter was inserted prior to the procedure; Group 2: Patients receiving no catheter before PNL. In addition to the duration of the procedure as a whole and also all relevant stages as well, radiation exposure time, hospitalization period, mean nephrostomy tube duration, mean drop in Hb levels and all intra and postoperative complications have been evaluated. Mean size of the stones was 308.5 ± 133.2 mm2. Mean total duration of the PNL procedure in cases with open end ureteral catheter was significantly longer than the other cases (p < 0.001). Evaluation of the outcomes of the PNL procedures revealed no statistically significant difference between two groups regarding the stone-free rates (86% vs 84%). Additionally, there was no significant difference with respect to the duration of nephrostomy tube, hospitalization period and secondary procedures needed, complication rates as well as the post-operative Hb drop levels in both groups (p = 0.6830). Our results indicate that the placement of an open end ureteral catheter prior to a PNL procedure performed under sonographic access may not be indicated in selected cases presenting with solitary obstructing renal pelvic and/or calyceal stones.

  15. Emergency coronary angioplasty with stenting using Cordis® diagnostic coronary catheters when there is difficulty in engaging guide catheters and bench evaluation of diagnostic and guide catheters.

    PubMed

    Arokiaraj, Mark Christopher

    2018-02-01

    Difficulty in engaging with guide catheters is not uncommon in acute emergencies. We aimed to evaluate the use of Cordis ® INFINITI diagnostic catheters to perform angioplasty in patients in whom the coronaries cannot be engaged using standard guide catheters. In 34 cases of acute coronary syndrome, when difficulty in engagement with two standard guide catheters was encountered with reasonable manipulations, angioplasty was performed using diagnostic catheters. In total, 40 stents were placed by this technique. Pushability and trackability, distal tip flexion and three-point bending tests were performed to evaluate the performance of the guide and diagnostic catheters. Angioplasty was performed easily in a setting where it would have been very difficult to perform. Coronary dissection occurred in one patient, treated by a stent. The stent and dilatation balloons were easily passed through the diagnostic catheters. Pressure tracings were clearly preserved with certain stent delivery systems, and at angioplasty, although there was slightly reduced opacification of the respective artery, the coronary anatomy was sufficiently visualized to perform angioplasty. No periprocedural target lesion complications were seen in any cases. Pushability and trackability tests showed good force transmission along a tortuous path with diagnostic catheters, and balanced force-displacement curves from three-point bending tests and distal tip softness tests. Angioplasty with stenting can be performed safely through 6F Cordis ® infiniti diagnostic catheters when difficulty in engaging guide catheters is encountered. Copyright © 2018 Sociedade Portuguesa de Cardiologia. Publicado por Elsevier España, S.L.U. All rights reserved.

  16. Detecting DNA synthesis of neointimal formation after catheter balloon injury in GK and in Wistar rats: using 5-ethynyl-2'-deoxyuridine.

    PubMed

    Guo, Jingsheng; Li, Dongye; Bai, Shiru; Xu, Tongda; Zhou, Zhongmin; Zhang, Yanbin

    2012-12-13

    Neointimal formation plays an important role in the pathogenesis of coronary restenosis after percutaneous coronary intervention (PCI), especially in patients with diabetes mellitus. Recently, some studies have shown that 5-ethynyl-2'-deoxyuridine (EdU) incorporation can serve as a novel alternative to the 5-bromo-2'-deoxyuridine (BrdU) antibody detection method for detection of DNA synthesis in regenerating avian cochlea, chick embryo and the adult nervous system. However, few studies have been performed to assess the suitability of EdU for detecting DNA synthesis in vascular neointima. The carotid artery balloon injury model was established in Goto-Kakizaki (GK) and Wistar rats. A Cell-LightTM EdU Kit was used to detect EdU-labeled cell nuclei of common carotid arteries at day 7 after catheter balloon injury. Different methods of injecting EdU were tested. The protein levels of proliferating cell nuclear antigen (PCNA) and p-Akt (Ser473), as well as the mRNA levels of PCNA were evaluated by Western blotting and quantitative real-time PCR (qRT-PCR), respectively. Immunohistochemical staining was also employed to visualize PCNA-positive cells. At day 7 after catheter balloon injury, far more EdU-positive and PCNA-positive cells were observed in GK rats. When comparing groups that received different EdU doses, it was found that the percentage of EdU-positive cells at a dose of 100 mg/kg body weight was than at doses of 25 mg/kg and 50 mg/kg. The number of positive cells was significantly higher in the repeated injection group compared to the single injection group. Further, after balloon injury DNA synthesis in GK rats was more notable than in Wistar rats. Neointimal formation in GK rats was more obvious than in Wistar rats. The protein levels of PCNA and p-Akt (Ser473) and the mRNA levels of PCNA were increased in injured rats as compared to uninjured rats, and were significantly higher in GK rats than in Wistar rats. By intraperitoneal injections of EdU at a dose

  17. Novel paclitaxel-coated angioplasty balloon catheter based on cetylpyridinium salicylate: preparation, characterization and simulated use in an in vitro vessel model.

    PubMed

    Petersen, Svea; Kaule, Sebastian; Stein, Florian; Minrath, Ingo; Schmitz, Klaus-Peter; Kragl, Udo; Sternberg, Katrin

    2013-10-01

    Drug-coated balloons (DCB), which have emerged as therapeutic alternative to drug-eluting stents in percutaneous cardiovascular intervention, are well described with regard to clinical efficiency and safety within a number of clinical studies. In vitro studies elucidating the correlation of coating method and composition with DCB performance are however rare but considered important for the understanding of DCB requirements and the improvement of established DCB. In this context, we evaluated the applicability of a pipetting, dip-coating, and spray-coating process for the establishment of DCB based on paclitaxel (PTX) and the ionic liquid cetylpyridinium salicylate (Cetpyrsal) as novel innovative additive in three different compositions. Among tested methods and compositions, the pipetting process with 50 wt.% PTX resulted in most promising coatings as drug load was less controllable by the other processes and higher PTX contents led to considerable drug crystallization, as visualized by electron microscopy, accelerating PTX loss during short-term elution. Applying these conditions, homogeneous coatings could be applied on balloon catheter, whose simulated use in an in vitro vessel model revealed percental drug losses of 36 and 28% during transit and percental drug transfers of 12 and 40% under expansion for coatings applied in expanded and folded balloon condition, respectively. In comparison to literature values, these results support the high potential of Cetpyrsal as novel DCB matrix regarding low drug loss and efficient drug transfer. © 2013.

  18. [Two cases of afferent loop syndrome caused by obstruction at the jejuno-jejunostomy site in the Roux-en-Y loop that were successfully treated by endoscopic balloon dilatation].

    PubMed

    Yasuda, Atsushi; Imamoto, Haruhiko; Furukawa, Hiroshi; Imano, Motohiro; Yasuda, Takushi; Okuno, Kiyokata

    2014-11-01

    We report 2 rare cases of afferent loop syndrome caused by obstruction at the jejuno-jejunostomy site in the Roux-en-Y loop after total gastrectomy, which was successfully treated by endoscopic balloon dilatation of the anastomotic stenosis. Case 1: A 62-year-old woman presented with malaise and lower abdominal distension 6 months after laparoscopy-assisted total gastrectomy with Roux-en-Y reconstruction. She was diagnosed with afferent loop syndrome; CT imaging indicated marked dilatation of the afferent loop, with membranous obstruction at the jejuno-jejunostomy site in the Roux-en-Y loop. Although almost complete occlusion was noted at the jejuno-jejunostomy site, the obstruction was successfully relieved by endoscopic balloon dilation using TandemTM XL Triple Lumen ERCP Cannula (Boston Scientific)®. Case 2: A 70-year-old man presented with malaise and lower abdominal distension 3 years after laparoscopy-assisted total gastrectomy with Roux-en-Y reconstruction. He was diagnosed with afferent loop syndrome; CT imaging indicated complete obstruction at the jejuno-jejunostomy site in the Roux-en-Y loop. As in case 1, the obstruction was successfully treated by endoscopic balloon dilatation of the occluded anastomosis.

  19. Acute Urinary Obstruction in a Tetraplegic Patient from Misplacement of Catheter in Urethra.

    PubMed

    Vaidyanathan, Subramanian; Singh, Gurpreet; Hughes, Peter L; Soni, Bakul M

    2016-01-01

    A male tetraplegic patient attended accident and emergency with a blocked catheter; on removing the catheter, he passed bloody urine. After three unsuccessful attempts were made to insert a catheter by nursing staff, a junior doctor inserted a three-way Foley catheter with a 30-mL balloon but inflated the balloon with 10 mL of water to commence the bladder irrigation. The creatinine level was mostly 19 µmol/L (range: 0-135 µmol/L) but increased to 46 µmol/L on day 7. Computerized tomography urogram revealed that the bilateral hydronephrosis with hydroureter was extended down to urinary bladder, the bladder was distended, prostatic urethra was dilated and filled with urine, and although the balloon of Foley catheter was not seen in the bladder, the tip of the catheter was seen lying in the urethra. Following the re-catheterization, the creatinine level decreased to 21 µmol/L. A follow-up ultrasound scan revealed no evidence of hydronephrosis in both kidneys. Flexible cystoscopy revealed inflamed bladder mucosa, catheter reaction, and tiny stones. There was no bladder tumor. This case report concludes that the cause of bilateral hydronephrosis, hydroureter, and distended bladder was inadequate drainage of urinary bladder as the Foley balloon that was under-filled slipped into the urethra resulting in an obstruction to urine flow. Urethral catheterization in tetraplegic patients should be performed by senior, experienced staff in order to avoid trauma and incorrect positioning. Tetraplegic subjects with decreased muscle mass have low creatinine level. Increase in creatinine level (>1.5 times the basal level) indicates acute kidney injury, although peak creatinine level may still be within laboratory reference range. While scanning the urinary tract of spinal cord injury patients with indwelling urinary catheter, if Foley balloon is not seen within the bladder, urethra should be scanned to locate the Foley balloon.

  20. [Coronary angioplasty with the Monorail system via 6 French diagnostic catheters].

    PubMed

    Villavicencio, R; González, H; López, J; Zavala, E; Ban Hayashi, E B; Gaspar, J; Gil, M; Martínez Ríos, M A

    1994-01-01

    We studied the use of "Monorail" system with Express (Scimed) balloon catheters for coronary angioplasty through 6 French (F) "high-flow" diagnostic catheters (Novoste, USCI). Prospectively, from July 1992 to January 1993, angioplasty of 31 lesions in 24 patients was attempted (1.3 lesions/procedure). Twenty procedures were of a single lesion and four were multi-vessel angioplasty. Fourteen lesions were in the left anterior descending or in its branches, 10 in the left circumflex or in its branches, 6 in the right coronary artery, and one in the distal anastomosis of an internal mammary artery graft. Thirteen lesions (42%) were type A, 17 (55%) type B and one (3%) type C. Balloon sizes varied between 2.0 and 3.5 mm. Twenty-nine lesions could be successfully dilated (93.5%); two cases were unsuccessful due to an acute occlusion in one and residual stenosis of more than 50% in the other. For only one case, another balloon catheter different from the "Monorail" system was necessary to complete a multi-vessel angioplasty. Coronary visualization and manipulation of the balloon through the tip of the diagnostic catheter were satisfactory in all cases, except with the 3.5 mm balloon catheter. Coronary angioplasty with "Monorail" system balloon catheters through 6 F "high-flow" diagnostic catheters is feasible and provides a high success rate in simple and moderately complex selected lesions, including multivessel angioplasty with advantages of smaller artery punction and the feasibility of performing coronary angioplasty with the same catheter used for diagnostic angiography.

  1. 21 CFR 876.5130 - Urological catheter and accessories.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... device that is inserted through the urethra and used to pass fluids to or from the urinary tract. This..., coude catheters, balloon retention type catheters, straight catheters, upper urinary tract catheters...

  2. Pneumatic balloon dilation in pediatric achalasia: efficacy and factors predicting outcome at a single tertiary pediatric gastroenterology center.

    PubMed

    Di Nardo, Giovanni; Rossi, Paolo; Oliva, Salvatore; Aloi, Marina; Cozzi, Denis A; Frediani, Simone; Redler, Adriano; Mallardo, Saverio; Ferrari, Federica; Cucchiara, Salvatore

    2012-11-01

    The use of pneumatic dilation (PD) is well established in adults with achalasia; however, it is less commonly used in children. To evaluate the efficacy of PD in pediatric achalasia and to define predictive factors for its treatment failure. Single-center, prospective cohort study. Academic tertiary referral center. Twenty-four patients with achalasia were enrolled from January 2004 to November 2009 and were followed for a median of 6 years. PD was performed with the patients under general anesthesia. Efficacy and safety of PD. Follow-up was performed by using the Eckardt score, barium swallow contrast studies, and esophageal manometry at baseline; 1, 3, and 6 months after dilation; and every year thereafter. A Cox regression model was used to identify independent predictors of failure after the first PD. The PD success rate was 67%. In 8 patients, the first PD failed, but the parents of one patient refused a second PD and requested surgery. Of the 7 patients who underwent repeated treatment, the second PD failed in 3 (43%). Overall, only 3 of the 24 patients underwent surgery (overall success rate after a maximum of 3 PDs was 87%). Multivariate analysis showed that only older age was independently associated with a higher probability of the procedure success (hazard ratio [HR] 0.66; 95% CI, 0.45-0.97). Small sample size, single-center study. PD is a safe and effective technique in the management of pediatric achalasia. Young age is an independent negative predictive factor for successful clinical outcome. Copyright © 2012 American Society for Gastrointestinal Endoscopy. Published by Mosby, Inc. All rights reserved.

  3. Percutaneous Balloon Dilatation for the Treatment of Early and Late Ureteral Strictures After Renal Transplantation: Long-Term Follow-Up

    SciTech Connect

    Bachar, Gil N.; Mor, E.; Bartal, G.

    2004-08-15

    We report our experience with percutaneous balloon dilatation (PBD) for the treatment of ureteral strictures in patients with renal allografts. Of the 422 consecutive patients after renal transplantation in our center 10 patients had ureteral strictures. An additional 11 patients were referred from other centers. The 21 patients included 15 men and 6 women aged 16 to 67 years. Strictures were confirmed by sonography and scintigraphy in all cases. Patients underwent 2 to 4 PBDs at 7-10-day intervals. Clinical success was defined as resolution of the stenosis and hydronephrosis on sequential ultrasound and normalization of creatinine levels. Patients were dividedmore » into two groups: those who underwent transplantation more than 3 months previously and those who underwent transplantation less than 3 months previously. PBD was successful in 13 of the 21 patients (62%). There was no statistically significant difference in success rate between the patients with early (n 12) and those with late (n = 9) obstruction: 58.4% and 66%, respectively. No major complications were documented. PBD is a safe and simple tool for treating ureteral strictures and procedure-related morbidity is low. It can serve as an initial treatment in patients with early or late ureteral strictures after renal transplantation.« less

  4. Stenting for curved lesions using a novel curved balloon: Preliminary experimental study.

    PubMed

    Tomita, Hideshi; Higaki, Takashi; Kobayashi, Toshiki; Fujii, Takanari; Fujimoto, Kazuto

    2015-08-01

    Stenting may be a compelling approach to dilating curved lesions in congenital heart diseases. However, balloon-expandable stents, which are commonly used for congenital heart diseases, are usually deployed in a straight orientation. In this study, we evaluated the effect of stenting with a novel curved balloon considered to provide better conformability to the curved-angled lesion. In vitro experiments: A Palmaz Genesis(®) stent (Johnson & Johnson, Cordis Co, Bridgewater, NJ, USA) mounted on the Goku(®) curve (Tokai Medical Co. Nagoya, Japan) was dilated in vitro to observe directly the behavior of the stent and balloon assembly during expansion. Animal experiment: A short Express(®) Vascular SD (Boston Scientific Co, Marlborough, MA, USA) stent and a long Express(®) Vascular LD stent (Boston Scientific) mounted on the curved balloon were deployed in the curved vessel of a pig to observe the effect of stenting in vivo. In vitro experiments: Although the stent was dilated in a curved fashion, stent and balloon assembly also rotated conjointly during expansion of its curved portion. In the primary stenting of the short stent, the stent was dilated with rotation of the curved portion. The excised stent conformed to the curved vessel. As the long stent could not be negotiated across the mid-portion with the balloon in expansion when it started curving, the mid-portion of the stent failed to expand fully. Furthermore, the balloon, which became entangled with the stent strut, could not be retrieved even after complete deflation. This novel curved balloon catheter might be used for implantation of the short stent in a curved lesion; however, it should not be used for primary stenting of the long stent. Post-dilation to conform the stent to the angled vessel would be safer than primary stenting irrespective of stent length. Copyright © 2014 Japanese College of Cardiology. Published by Elsevier Ltd. All rights reserved.

  5. Endovascular recanalization of a port catheter-associated superior vena cava syndrome.

    PubMed

    Tonak, Julia; Fetscher, Sebastian; Barkhausen, Jörg; Goltz, Jan Peter

    2015-01-01

    Superior vena cava (SVC) syndrome owing to benign etiology is rare and endovascular techniques have been advocated as the treatment of choice. We report a case of endovascular revascularization of a port catheter-associated complete occlusion of the SVC with reversed flow in the azygos vein. In this setting using a sheath in combination with its dilatator to pass the occlusion of the SVC after neither a diagnostic catheter nor a PTA balloon would pass the lesion may be a valid option. A dual venous approach was established using the right common femoral vein and an indwelling port catheter in the right cephalic vein to dilate and stent the lesion. Finally, a port may be implanted after the revascularization had been successful. Passage through the port catheter-associated occlusion of the SVC was only possible by use of the sheath in combination with its dilatator. A dual venous access by the femoral approach and the indwelling central catheter is helpful in treating a SVC occlusion. Long-term central venous catheters may cause SVC syndrome, especially with a catheter tip located too far cranially. An endovascular revascularization of a complete occlusion of the SVC represents the therapy of choice.

  6. Coronary angioplasty with second generation Monorail catheters.

    PubMed

    Pande, A K; Meier, B; Urban, P; Villavicencio, R; de la Serna, F; Moles, V

    1991-07-01

    The Monorail system (Schneider) consists of a balloon catheter in which the guidewire passes through the balloon itself, exits the catheter proximal to the balloon, and runs alongside its small shaft (3 French) through the length of the guiding catheter. It offers distinct advantages over conventional systems of coronary angioplasty. It facilitates contrast injections and permits rapid balloon exchanges. This system was used for coronary angioplasty in 273 unselected consecutive patients (age 59 +/- 10, mean 35 to 73 years). There were 216 patients (84%) undergoing single-vessel and 57 patients (16%) with multi-vessel coronary angioplasty. A total of 335 coronary stenoses were dilated, which included 35 total occlusions. The size of balloon used ranged from 2.0 to 4.25 mm (3.0 +/- 0.5 mm) and the severity of stenosis was 85 +/- 11%. Technical success was defined as a residual stenosis of less than 50% as determined angiographically. Clinical success was defined as technical success, and absence of a major inhospital complication defined as absence of myocardial infarction, lack of need for coronary arterial bypass surgery, and survival. The Monorail system was technically successful in 294/300 stenotic lesions (98%). It was clinically successful for 281 lesions (94%). Of the 35 total occlusions, technical success was obtained in 25 (71%). The residual stenosis of successful cases was 26 +/- 21%. The Monorail system was also successful in 5 patients with stenosis of more than 90% in whom conventional systems failed. The complications included acute occlusion causing acute myocardial infarction in 13 cases (5%), emergency coronary arterial bypass surgery in 1 patient (0.4%), and death in 4 patients (1.5%).(ABSTRACT TRUNCATED AT 250 WORDS)

  7. Central Vein Dilatation Prior to Concomitant Port Implantation

    SciTech Connect

    Krombach, Gabriele A., E-mail: krombach@rad.rwth-aachen.de; Plumhans, Cedric; Goerg, Fabian

    2010-04-15

    Implantation of subcutaneous port systems is routinely performed in patients requiring repeated long-term infusion therapy. Ultrasound- and fluoroscopy-guided implantation under local anesthesia is broadly established in interventional radiology and has decreased the rate of complications compared to the surgical approach. In addition, interventional radiology offers the unique possibility of simultaneous management of venous occlusion. We present a technique for recanalization of central venous occlusion and angioplasty combined with port placement in a single intervention which we performed in two patients. Surgical port placement was impossible owing to occlusion of the superior vena cava following placement of a cardiac pacemaker andmore » occlusion of multiple central veins due to paraneoplastic coagulopathy, respectively. In both cases the affected vessel segments were dilated with balloon catheters and the port systems were placed thereafter. After successful dilatation, the venous access was secured with a 25-cm-long, 8-Fr introducer sheath, a subcutaneous pocket prepared, and the port catheter tunneled to the venipuncture site. The port catheter was introduced through the sheath with the proximal end connected to a 5-Fr catheter. This catheter was pulled through the tunnel in order to preserve the tunnel and, at the same time, allow safe removal of the long sheath over the wire. The port system functioned well in both cases. The combination of recanalization and port placement in a single intervention is a straightforward alternative for patients with central venous occlusion that can only be offered by interventional radiology.« less

  8. Quantified degree of eccentricity of aortic valve calcification predicts risk of paravalvular regurgitation and response to balloon post-dilation after self-expandable transcatheter aortic valve replacement.

    PubMed

    Park, Jun-Bean; Hwang, In-Chang; Lee, Whal; Han, Jung-Kyu; Kim, Chi-Hoon; Lee, Seung-Pyo; Yang, Han-Mo; Park, Eun-Ah; Kim, Hyung-Kwan; Chiam, Paul T L; Kim, Yong-Jin; Koo, Bon-Kwon; Sohn, Dae-Won; Ahn, Hyuk; Kang, Joon-Won; Park, Seung-Jung; Kim, Hyo-Soo

    2018-05-15

    Limited data exist regarding the impact of aortic valve calcification (AVC) eccentricity on the risk of paravalvular regurgitation (PVR) and response to balloon post-dilation (BPD) after transcatheter aortic valve replacement (TAVR). We investigated the prognostic value of AVC eccentricity in predicting the risk of PVR and response to BPD in patients undergoing TAVR. We analyzed 85 patients with severe aortic stenosis who underwent self-expandable TAVR (43 women; 77.2±7.1years). AVC was quantified as the total amount of calcification (total AVC load) and as the eccentricity of calcium (EoC) using calcium volume scoring with contrast computed tomography angiography (CTA). The EoC was defined as the maximum absolute difference in calcium volume scores between 2 adjacent sectors (bi-partition method) or between sectors based on leaflets (leaflet-based method). Total AVC load and bi-partition EoC, but not leaflet-based EoC, were significant predictors for the occurrence of ≥moderate PVR, and bi-partition EoC had a better predictive value than total AVC load (area under the curve [AUC]=0.863 versus 0.760, p for difference=0.006). In multivariate analysis, bi-partition EoC was an independent predictor for the risk of ≥moderate PVR regardless of perimeter oversizing index. The greater bi-partition EoC was the only significant parameter to predict poor response to BPD (AUC=0.775, p=0.004). Pre-procedural assessment of AVC eccentricity using CTA as "bi-partition EoC" provides useful predictive information on the risk of significant PVR and response to BPD in patients undergoing TAVR with self-expandable valves. Copyright © 2017 Elsevier B.V. All rights reserved.

  9. Clinical efficacy, safety, and costs of percutaneous occlusive balloon catheter-assisted ureteroscopic lithotripsy for large impacted proximal ureteral calculi: a prospective, randomized study.

    PubMed

    Qi, Shiyong; Li, Yanni; Liu, Xu; Zhang, Changwen; Zhang, Hongtuan; Zhang, Zhihong; Xu, Yong

    2014-09-01

    To evaluate the clinical efficacy, safety, and costs of percutaneous occlusive balloon catheter-assisted ureteroscopic lithotripsy (POBC-URSL) for large impacted proximal ureteral calculi. 156 patients with impacted proximal ureteral stones ≥1.5 cm in size were randomized to ureteroscopic lithotripsy (URSL), POBC-URSL, and percutaneous nephrolithotomy (PNL) group between May 2010 and May 2013. For URSL, the calculi were disintegrated with the assistance of anti-retropulsion devices. POBC-URSL was performed with the assistance of an 8F percutaneous occlusive balloon catheter. PNL was finished with the combination of an ultrasonic and a pneumatic lithotripter. A flexible ureteroscope and a 200 μm laser fiber were used to achieve stone-free status to a large extent for each group. Variables studied were mean operative time, auxiliary procedure, postoperative hospital stay, operation-related complications, stone clearance rate, and treatment costs. The mean lithotripsy time for POBC-URSL was shorter than URSL, but longer than PNL (42.6±8.9 minutes vs 66.7±15.3 minutes vs 28.1±6.3 minutes, p=0.014). The auxiliary procedure rate and postoperative fever rate for POBC-URSL were significantly lower than URSL and comparable to PNL (p<0.01, p=0.034). POBC-URSL was superior to URSL with regard to the stone clearance rate at 3 days postoperatively, and as good as PNL (98.1% vs 75.0% vs 96.2%, p<0.01). The postoperative hospital stay and hematuria rate were lower in POBC-URSL group than PNL group and similar to URSL group (p=0.016, p<0.01). The treatment costs were lowest in POBC-URSL group ($1205.0±$113.9 vs $1731.7±$208.1 vs $2446.4±$166.4, p=0.004). For large impacted proximal ureteral calculi, POBC-URSL was associated with a higher stone clearance rate, fewer complications and costs. POBC-URSL combined the advantages of URSL and PNL.

  10. Improvements in critical dosimetric endpoints using the Contura multilumen balloon breast brachytherapy catheter to deliver accelerated partial breast irradiation: preliminary dosimetric findings of a phase iv trial.

    PubMed

    Arthur, Douglas W; Vicini, Frank A; Todor, Dorin A; Julian, Thomas B; Lyden, Maureen R

    2011-01-01

    Dosimetric findings in patients treated with the Contura multilumen balloon (MLB) breast brachytherapy catheter to deliver accelerated partial breast irradiation (APBI) on a multi-institutional Phase IV registry trial are presented. Computed tomography-based three-dimensional planning with dose optimization was performed. For the trial, new ideal dosimetric goals included (1) ≥95% of the prescribed dose (PD) covering ≥90% of the target volume, (2) a maximum skin dose ≤125% of the PD, (3) maximum rib dose ≤145% of the PD, and (4) the V150 ≤50 cc and V200 ≤10 cc. The ability to concurrently achieve these dosimetric goals using the Contura MLB was analyzed. 144 cases were available for review. Using the MLB, all dosimetric criteria were met in 76% of cases. Evaluating dosimetric criteria individually, 92% and 89% of cases met skin and rib dose criteria, respectively. In 93% of cases, ideal target volume coverage goals were met, and in 99%, dose homogeneity criteria (V150 and V200) were satisfied. When skin thickness was ≥5 mm to <7 mm, the median skin dose was limited to 120.1% of the PD, and when skin thickness was <5 mm, the median skin dose was 124.2%. When rib distance was <5 mm, median rib dose was reduced to 136.5% of the PD. When skin thickness was <7 mm and distance to rib was <5 mm, median skin and rib doses were jointly limited to 120.6% and 142.1% of the PD, respectively. The Contura MLB catheter provided the means of achieving the imposed higher standard of dosimetric goals in the majority of clinical scenarios encountered. Copyright © 2011 Elsevier Inc. All rights reserved.

  11. Improvements in Critical Dosimetric Endpoints Using the Contura Multilumen Balloon Breast Brachytherapy Catheter to Deliver Accelerated Partial Breast Irradiation: Preliminary Dosimetric Findings of a Phase IV Trial

    SciTech Connect

    Arthur, Douglas W., E-mail: darthur@mcvh-vcu.ed; Vicini, Frank A.; Todor, Dorin A.

    2011-01-01

    Purpose: Dosimetric findings in patients treated with the Contura multilumen balloon (MLB) breast brachytherapy catheter to deliver accelerated partial breast irradiation (APBI) on a multi-institutional Phase IV registry trial are presented. Methods and Materials: Computed tomography-based three-dimensional planning with dose optimization was performed. For the trial, new ideal dosimetric goals included (1) {>=}95% of the prescribed dose (PD) covering {>=}90% of the target volume, (2) a maximum skin dose {<=}125% of the PD, (3) maximum rib dose {<=}145% of the PD, and (4) the V150 {<=}50 cc and V200 {<=}10 cc. The ability to concurrently achieve these dosimetric goals usingmore » the Contura MLB was analyzed. Results: 144 cases were available for review. Using the MLB, all dosimetric criteria were met in 76% of cases. Evaluating dosimetric criteria individually, 92% and 89% of cases met skin and rib dose criteria, respectively. In 93% of cases, ideal target volume coverage goals were met, and in 99%, dose homogeneity criteria (V150 and V200) were satisfied. When skin thickness was {>=}5 mm to <7 mm, the median skin dose was limited to 120.1% of the PD, and when skin thickness was <5 mm, the median skin dose was 124.2%. When rib distance was <5 mm, median rib dose was reduced to 136.5% of the PD. When skin thickness was <7 mm and distance to rib was <5 mm, median skin and rib doses were jointly limited to 120.6% and 142.1% of the PD, respectively. Conclusion: The Contura MLB catheter provided the means of achieving the imposed higher standard of dosimetric goals in the majority of clinical scenarios encountered.« less

  12. Second-generation endometrial ablation technologies: the hot liquid balloons.

    PubMed

    Vilos, George A; Edris, Fawaz

    2007-12-01

    Hysteroscopic endometrial ablation (HEA) was introduced in the 1980s to treat menorrhagia. Its use required additional training, surgical expertise and specialized equipment to minimize emergent complications such as uterine perforations, thermal injuries and excessive fluid absorption. To overcome these difficulties and concerns, thermal balloon endometrial ablation (TBEA) was introduced in the 1990s. Four hot liquid balloons have been introduced into clinical practice. All systems consist of a catheter (4-10mm diameter), a silicone balloon and a control unit. Liquids used to inflate the balloons include internally heated dextrose in water (ThermaChoice, 87 degrees C), and externally heated glycine (Cavaterm, 78 degrees C), saline (Menotreat, 85 degrees ) and glycerine (Thermablate, 173 degrees C). All balloons require pressurization from 160 to 240 mmHg for treatment cycles of 2 to 10 minutes. Prior to TBEA, preoperative endometrial thinning, including suction curettage, is optional. Several RCTs and cohort studies indicate that the advantages of TBEA include portability, ease of use and short learning curve. In addition, small diameter catheters requiring minimal cervical dilatation (5-7 mm) and short duration of treatment cycles (2-8 min) allow treatment under minimal analgesia/anesthesia requirements in a clinic setting. Following TBEA serious adverse events, including thermal injuries to viscera have been experienced. To minimize such injuries some surgeons advocate the use of routine post-dilatation hysteroscopy and/or ultrasonography to confirm correct intrauterine placement of the balloon prior to initiating the treatment cycle. After 10 years of clinical practice, TBEA is thought to be the preferred first-line surgical treatment of menorrhagia in appropriately selected candidates. Economic modeling also suggested that TBEA may be more cost-effective than HEA.

  13. The efficacy of pre-delivery prophylactic trans-catheter arterial balloon occlusion of bilateral internal iliac artery in patients with suspected placental adhesion.

    PubMed

    Cho, Yoon Jin; Oh, Yong Taek; Kim, Suk Young; Kim, Ju Young; Jung, Sun Young; Chon, Seung Joo; Kim, Jeong Ho; Byun, Sung Su

    2017-01-01

    Prophylactic trans-catheter arterial balloon occlusion (PTABO) before cesarean section of placenta previa totalis has been introduced to prevent massive hemorrhage. The purpose of this study is to evaluate the clinical usefulness of PTABO in cases of suspected placental adhesion and to examine antepartal risk factors and perinatal outcomes in women with placental adhesion. Between January 2012 and December 2015, 77 patients who had undergone ultrasonography for evaluation of placenta previa were enrolled in this study. Seventeen of these patients with suspected placental adhesion by ultrasonography and Pelvic MRI underwent PTABO before cesarean section and another 59 patients underwent cesarean section without PTABO. Antepartal risk factors and peripartum maternal and neonatal outcomes were compared between patients with PTABO and those without PTABO. More advanced maternal age, longer in gestational weeks at delivery, and more common previous cesarean section history were observed in the PTABO group. Placenta adhesion, abnormal Doppler findings, and frequency of transfusion were more common in the PTABO group. However there was no significant difference in estimated blood loss, hospital days, and neonatal outcome. It had occurred 3 cases of hysterectomy and 1 case of uterine artery embolization after cesarean section in the PTABO group. Close surveillance of antepartum risk factors for placental adhesion using ultrasonography and pelvic magnetic resonance imaging is important to prevention of massive hemorrhage during cesarean section. PTABO before cesarean section might result in reduced blood loss and requirement for transfusion during the operation.

  14. The in vitro interactions between serum lipoproteins and proteoglycans of the neointima of rabbit aorta after a single balloon catheter injury.

    PubMed

    Alavi, M Z; Richardson, M; Moore, S

    1989-02-01

    The effect of injury-induced alterations in the aortic neointimal proteoglycans on their binding with homologous serum lipoproteins was examined. Proteoglycans of the aortic intimal-medial tissues of rabbits that had undergone denudation with a balloon catheter 12 weeks earlier were isolated after homogenization of the tissues in 0.33 M sucrose, ultracentrifugation and subsequently by gel-exclusion chromatography. Lipoproteins from the plasma of healthy donors were prepared by sequential, ultracentrifugal floatation after density adjustment with KBr. To study the interactions, aliquots of electrophoretically pure very low-density lipoproteins (VLDL, d less than 1.006 g/ml), low-density lipoproteins (LDL, d = 1.019-1.063 g/ml), or high-density lipoproteins (HDL, d = 1.210 g/ml) were incubated with proteoglycans in the presence of Ca++ and Mg++ at 4 C. The amount of cholesterol found in the resulting pellet was measured as a marker of the binding capacity of the proteoglycans. Among lipoprotein fractions both VLDL and LDL showed strong binding with proteoglycans, whereas no appreciable binding was observed when incubation experiments were done with HDL. There were significant differences in the lipoprotein binding capacity of proteoglycan of control and injured animals, indicating that injury induced changes in proteoglycan composition exert profound influences on their ionic interactions.

  15. Stunning and Right Ventricular Dysfunction Is Induced by Coronary Balloon Occlusion and Rapid Pacing in Humans: Insights From Right Ventricular Conductance Catheter Studies.

    PubMed

    Axell, Richard G; Giblett, Joel P; White, Paul A; Klein, Andrew; Hampton-Til, James; O'Sullivan, Michael; Braganza, Denise; Davies, William R; West, Nick E J; Densem, Cameron G; Hoole, Stephen P

    2017-06-06

    We sought to determine whether right ventricular stunning could be detected after supply (during coronary balloon occlusion [BO]) and supply/demand ischemia (induced by rapid pacing [RP] during transcatheter aortic valve replacement) in humans. Ten subjects with single-vessel right coronary artery disease undergoing percutaneous coronary intervention with normal ventricular function were studied in the BO group. Ten subjects undergoing transfemoral transcatheter aortic valve replacement were studied in the RP group. In both, a conductance catheter was placed into the right ventricle, and pressure volume loops were recorded at baseline and for intervals over 15 minutes after a low-pressure BO for 1 minute or a cumulative duration of RP for up to 1 minute. Ischemia-induced diastolic dysfunction was seen 1 minute after RP (end-diastolic pressure [mm Hg]: 8.1±4.2 versus 12.1±4.1, P <0.001) and BO (end-diastolic pressure [mm Hg]: 8.1 ± 4.0 versus 8.7±4.0, P =0.03). Impairment of systolic and diastolic function after BO remained at 15-minutes recovery (ejection fraction [%]: 55.7±9.0 versus 47.8±6.3, P <0.01; end-diastolic pressure [mm Hg]: 8.1±4.0 versus 9.2±3.9, P <0.01). Persistent diastolic dysfunction was also evident in the RP group at 15-minutes recovery (end-diastolic pressure [mm Hg]: 8.1±4.1 versus 9.9±4.4, P =0.03) and there was also sustained impairment of load-independent indices of systolic function at 15 minutes after RP (end-systolic elastance and ventriculo-arterial coupling [mm Hg/mL]: 1.25±0.31 versus 0.85±0.43, P <0.01). RP and right coronary artery balloon occlusion both cause ischemic right ventricular dysfunction with stunning observed later during the procedure. This may have intraoperative implications in patients without right ventricular functional reserve. © 2017 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

  16. Colonic strictures: dilation and stents.

    PubMed

    Adler, Douglas G

    2015-04-01

    Colonic strictures, both benign and malignant, are commonly encountered in clinical practice. Benign strictures are most commonly treated by balloon dilation and less frequently with stents. Balloon dilation can help forestall or obviate surgery in some patients. Colonic strictures of malignant etiology generally need to be managed by stents and/or surgery. This article reviews endoscopic approaches to the management of colonic strictures. Copyright © 2015 Elsevier Inc. All rights reserved.

  17. 21 CFR 870.5150 - Embolectomy catheter.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    .... (a) Identification. An embolectomy catheter is a balloon-tipped catheter that is used to remove thromboemboli, i.e., blood clots which have migrated in blood vessels from one site in the vascular tree to...

  18. Long-Term Outcomes of Catheter Ablation of Electrical Storm in Nonischemic Dilated Cardiomyopathy Compared With Ischemic Cardiomyopathy.

    PubMed

    Muser, Daniele; Liang, Jackson J; Pathak, Rajeev K; Magnani, Silvia; Castro, Simon A; Hayashi, Tatsuya; Garcia, Fermin C; Supple, Gregory E; Riley, Michael P; Lin, David; Dixit, Sanjay; Zado, Erica S; Frankel, David S; Callans, David J; Marchlinski, Francis E; Santangeli, Pasquale

    2017-07-01

    The goal of this study was to determine the long-term outcomes of catheter ablation (CA) of electrical storm in patients with nonischemic dilated cardiomyopathy (NIDCM) compared with patients with ischemic cardiomyopathy (ICM). CA of ventricular tachycardia (VT) electrical storm has been shown to improve VT-free survival in patients with ICM. Data on the outcomes of CA of electrical storm in patients with NIDCM are insufficient. The study included 267 consecutive patients with NIDCM (n = 71; ejection fraction 32 ± 14%) and ICM (n = 196; ejection fraction 28 ± 12%). Endo-epicardial CA was performed in 59 (22%) patients. CA was guided by activation and entrainment mapping for tolerated VT and pacemapping/targeting of abnormal substrate for unmappable VT. After a median follow-up of 45 (25th to 75th percentile: 9 to 71) months and 1 (25th to 75th percentile: 1 to 8) procedures, 76 (29%) patients died, 25 (9%) underwent heart transplantation, 87 (33%) experienced VT recurrence, and 13 (5%) had recurrence of electrical storm. Overall VT-free survival was 54% at 60 months (48% in NIDCM and 54% in ICM; p = 0.128). Patients with VT recurrence experienced a median of 2 (1 to 10) VT episodes in the 5 (1 to 14) months after the procedure. Death/transplantation-free survival was 62% at 60 months (53% in NIDCM and 64% in ICM; p = 0.067). Persistent inducibility of any VT with cycle length ≥250 ms at programmed stimulation at the end of the procedure was the only independent predictor of VT recurrence. Low ejection fraction, New York Heart Association functional class, and VT recurrence over follow-up independently predicted death/transplantation. CA of electrical storm was similarly effective in patients with NIDCM compared with patients with ICM, with elimination of electrical storm in 95% of cases and achievement of complete VT control at long-term follow-up in most patients. Copyright © 2017 American College of Cardiology Foundation. Published by Elsevier Inc

  19. Usefulness of a collateral channel dilator for antegrade treatment of chronic total occlusion of a coronary artery.

    PubMed

    Obata, Jyun-Ei; Nakamura, Takamitsu; Kitta, Yoshinobu; Saito, Yukio; Sano, Keita; Fujioka, Daisuke; Kawabata, Ken-Ichi; Kugiyama, Kiyotaka

    2012-12-01

     The aim of this study was to clarify the effectiveness of a collateral channel dilator microcatheter in antegrade percutaneous coronary intervention (PCI) for chronic total occlusion (CTO) of a coronary artery.  The Corsair microcatheter, which was originally developed as a collateral channel dilator, has been reported to be useful for retrograde CTO-PCI.  We compared the success rate of the Corsair microcatheter collateral channel dilator for antegrade CTO-PCI with a previously available microcatheter. We analyzed the data from 27 patients (32 CTOs) using the FinecrossMG (Finecross group) and the data from 31 patients (34 CTOs) using the Corsair (Corsair group).  There were no significant differences in the clinical or lesion characteristics between the 2 groups. The success rate for crossing the CTO by the microcatheter was 62.5% in the Finecross group and 85.3% in the Corsair group (P < 0.05). After the Corsair crossed the CTO, a 2-mm diameter balloon catheter crossed the lesion in all the cases, but it crossed the lesion in only 17 of 20 cases in the Finecross group (85.0%, P < 0.05). The number of balloon catheters used for predilation was significantly less in the Corsair group compared with the Finecross group (P < 0.05).  The success rate for crossing of the microcatheters and the balloon catheters through the occlusion in antegrade CTO-PCI was better with the Corsair than with the FinecrossMG. In addition, the use of the Corsair reduced the number of balloon catheters used for predilation in antegrade CTO-PCI. ©2012, Wiley Periodicals, Inc.

  20. Retrograde suction decompression of a large internal carotid aneurysm using a balloon guide catheter combined with a blood-returning circuit and STA-MCA bypass: a technical note.

    PubMed

    Matano, Fumihiro; Mizunari, Takayuki; Kominami, Shushi; Suzuki, Masanori; Fujiki, Yu; Kubota, Asami; Kobayashi, Shiro; Murai, Yasuo; Morita, Akio

    2017-04-01

    It is difficult to treat large internal carotid aneurysms with simple surgical clipping. Here, we present a retrograde suction decompression (RSD) procedure for large internal carotid aneurysms using a balloon guide catheter combined with a blood-returning circuit and a superficial temporal artery to middle cerebral artery (STA-MCA) bypass.All patients underwent an STA-MCA bypass before the temporary occlusion of the internal carotid artery (ICA). A 6-French sheath was inserted into the common carotid artery (CCA), and a 6-French Patrive balloon catheter was placed into the ICA 5 cm past the bifurcation. Aneurysm exposure was obtained; temporary clips were placed on the proximal M1, A1, and posterior communicating (Pcom) segments; and an extension tube was then connected to the balloon catheter. A three-way stopcock was placed, and aspiration was performed through the device to collapse the aneurysm. The aspirated blood was returned to a venous line with an added heparin to prevent anemia after aspiration. During the decompression, the blood flow to the cortical area was supplied through the STA-MCA bypass. After the aneurysm collapse, the surgeon carefully dissected the perforating artery from the aneurysm dome or neck, and permanent clips were then placed on the aneurysm neck. Our procedure has several advantages, such as STA-MCA bypass without external carotid artery occlusion for preventing ischemic complications of the cortical area, anemia may be avoided because of the return of the aspirated blood, and a hybrid operation room is not required to perform this method.

  1. PTA of supra-aortic arteries with temporary balloon occlusion to avoid distal embolism.

    PubMed

    Koike, T; Minakawa, T; Abe, H; Takeuchi, S; Sasaki, O; Nishimaki, K; Tanaka, R

    1992-03-01

    Percutaneous transluminal angioplasty (PTA) was carried out in eight patients with cervical arterial stenosis; six in the subclavian and brachiocephalic arteries (5 with subclavian steal syndrome), one in the common carotid artery, and one in both the brachiocephalic and common carotid arteries (with subclavian steal syndrome). The PTA balloon catheters were introduced via the femoral artery in seven and brachial artery in one. To prevent distal embolization through the vertebral and internal carotid arteries, the blood flow in these vessels was temporarily occluded with a balloon catheter. The dilation of the stenotic areas was generally satisfactory. Antegrade blood flow was promptly obtained in the vertebral artery even in patients with subclavian steal syndrome. In all patients, the clinical symptoms improved. Two patients underwent repeat PTA because of restenosis.

  2. Successful balloon dilatation for postoperative caval stenosis caused by primary venorrhaphy for traumatic retro-hepatic caval injury in a three-year-old child: Report of a case.

    PubMed

    Masui, Daisuke; Iinuma, Yasushi; Hirayama, Yutaka; Nitta, Kohju; Iida, Hisataka; Otani, Tetsuya; Yokoyama, Naoyuki; Sato, Seiichi; Numano, Fujito; Yagi, Minoru

    2015-09-01

    Inferior vena cava injuries are highly lethal. We experienced a case of retrohepatic inferior vena cava injury as a result of blunt trauma in a three-year-old female. Because the site of bleeding of the IVC was identified, we repaired it with running sutures. An attempt at primary repair resulted in postoperative narrowing of the vena cava. There was pressure gradient of the right atrium and inferior vena cava, and collateral circulation developed. Since it was also found that the haemodynamics was unstable, the child underwent another intervention before the stenosis of the IVC was fixed. To the best of our knowledge, there have been no previous reports of therapeutic radiological intervention for stenosis that developed after treatment of a traumatic IVC injury. The IVC in the present case recovered enough patency so that the collateral venous flow could be decreased after balloon dilatation angioplasty. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. The glider balloon: a useful device for the treatment of bifurcation lesions.

    PubMed

    Briguori, Carlo; Visconti, Gabriella; Donahue, Michael; Chiariello, Giovanni Alfonso; Focaccio, Amelia

    2013-10-09

    Final kissing balloon dilatation (FKBD) is a recommended final step in case of treatment of bifurcation lesions by two stents approaches. Furthermore, dilatation of the side branch (SB) may be necessary following main vessel (MV) stenting. Occasionally, recrossing the stent struts with a balloon is hampered because the tip hits a stent strut. The Glider (TriReme Medical, Pleasanton, CA) is a dedicated balloon designed for crossing through struts of deployed stents toward a SB. From October 2010 to January 2012, FKBD was attempted in 236 consecutive bifurcation lesions treated in our Institution. FKBD was successfully performed by conventional balloon catheters in 221 (93.5%) lesions (Conventional group). In the remaining 15 (6.5%) lesions, where a conventional balloon failed to cross the stent strut, the Glider balloon was attempted (Glider group). The angle beta (between the axis of the MV after the branch point and the SB axis at the point of divergence) was wider in the Glider group (83±17° versus 65±27°; p=0.032). A trend toward an higher rate of the true bifurcation lesions was observed in the Glider group (93% versus 70.5%; p=0.07). The Glider balloon successfully crossed through MV stent struts toward a SB in 12 patients (80%), whereas failed in the remaining 3 patients. The Glider balloon represents an unique bail-out device which offers an effective rescue strategy for recrossing stent struts during complex bifurcation stenting. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  4. Acute urinary retention: which catheter?

    PubMed Central

    Allardice, J. T.; Standfield, N. J.; Wyatt, A. P.

    1988-01-01

    There is no scientific data on which is the best method and catheter to use in acute urinary retention in males. We therefore compared the efficiency of a size 12 G latex rubber balloon catheter with a similar calibre but more expensive catheter made of polyvinyl-chloride (PVC). A total of 50 patients was studied and a 100% successful catheterisation rate was recorded at first attempt with both catheters, with no significant complications. The importance of the correct management of acute urinary retention, especially adequate analgesia, is stressed and it is concluded that either catheter is satisfactory. PMID:3207328

  5. Replacement of Dislodged Gastrostomy Tubes After Stoma Dilation in the Pediatric Emergency Department.

    PubMed

    Bhambani, Shiloni; Phan, Tammy H; Brown, Lance; Thorp, Andrea W

    2017-06-01

    A dislodged gastrostomy tube (GT) is a common complaint that requires evaluation in the pediatric emergency department (ED) and, on occasion, will require stoma dilation to successfully replace the GT. The objective of this study was to describe the frequency that stoma dilation is required, the success rate of replacement, complications encountered, and the techniques used to confirm placement of the GT after dilation. We conducted a retrospective medical record review of children 0-18 years who presented to the pediatric ED from February 2013 through February 2015 with a dislodged GT that required stoma dilation by pediatric emergency physicians with serially increasing Foley catheter sizes prior to successful placement of the GT. We reviewed a total of 302 encounters in 215 patients, with 97 (32%) of the encounters requiring stoma dilation prior to replacing a GT. The median amount of dilation was 2 French between the initial Foley catheter size and the final GT size. There was a single complication of a mal-positioned balloon that was identified at the index visit. No delayed complications were encountered. We performed confirmation of placement in all patients. The two most common forms of confirmation were aspiration of gastric contents (56/97 [58%]) followed by contrast radiograph in 39 (40%). The practice of serial dilation of a gastrostomy stoma site to allow successful replacement of a gastrostomy tube in pediatric patients who present to the ED with a dislodged gastrostomy tube is generally successful and without increased complication. All patients received at least one form of confirmation for appropriate GT placement with the most common being aspiration of gastric contents.

  6. Initial Experience and Feasibility of the New Low-Profile Stingray Catheter as Part of the Antegrade Dissection and Re-Entry Revascularization Strategy for Coronary Chronic Total Occlusions

    PubMed Central

    Maeremans, Joren; Palmers, Pieter-Jan; Dens, Joseph

    2017-01-01

    Case series Patient: Male, 77 • Male, 57 • Male, 73 Final Diagnosis: Coronary chronic total occlusion Symptoms: Angina pectoris Medication: — Clinical Procedure: Percutaneous coronary intervention of coronary chronic total occlusions Specialty: Cardiology Objective: Unusual setting of medical care Background: During antegrade dissection re-entry (ADR) of chronic total occlusions (CTO), the first-generation Stingray catheter requires the use of large-bore guides (sheathless 7.5 Fr or 8 Fr), which increases the risk for access site-related complications and compromises radial approaches. Smaller guiding sizes necessitate long guidewires (e.g., 300 cm) or guidewire extensions for catheter advancement or removal. However, friction between guides and the Stingray catheter can result in unstable guidewire position or unintentional removal. Furthermore, failure to deliver the catheter at the distal re-entry zone is a common problem. To overcome issues of deliverability and reduce the need for pre-dilatations, with its inherent risk of creating subintimal hematomas, the Stingray low-profile (LP) balloon catheter was developed. Case Report: We describe 3 cases of successful application of the novel Stingray LP catheter during ADR. In all cases, 7 Fr guiding catheters were successfully used in combination with the device. The lower profile facilitated a good exchange and delivery of the device, without the need for balloon pre-dilatations in 2 cases. This resulted in a limited subintimal plane, enabling a smooth puncture into the true lumen. One case presented with extreme levels of calcification and tortuosity, resulting in a high degree of friction, despite the lower catheter profile. No in-hospital coronary or access site-related complications occurred. Conclusions: This case report illustrates the feasibility of the Stingray LP catheter for the treatment of CTOs via the ADR technique. The lower profile of the catheter potentially increases the deliverability

  7. Initial Experience and Feasibility of the New Low-Profile Stingray Catheter as Part of the Antegrade Dissection and Re-Entry Revascularization Strategy for Coronary Chronic Total Occlusions.

    PubMed

    Maeremans, Joren; Palmers, Pieter-Jan; Dens, Joseph

    2017-01-31

    BACKGROUND During antegrade dissection re-entry (ADR) of chronic total occlusions (CTO), the first-generation Stingray catheter requires the use of large-bore guides (sheathless 7.5 Fr or 8 Fr), which increases the risk for access site-related complications and compromises radial approaches. Smaller guiding sizes necessitate long guidewires (e.g., 300 cm) or guidewire extensions for catheter advancement or removal. However, friction between guides and the Stingray catheter can result in unstable guidewire position or unintentional removal. Furthermore, failure to deliver the catheter at the distal re-entry zone is a common problem. To overcome issues of deliverability and reduce the need for pre-dilatations, with its inherent risk of creating subintimal hematomas, the Stingray low-profile (LP) balloon catheter was developed. CASE REPORT We describe 3 cases of successful application of the novel Stingray LP catheter during ADR. In all cases, 7 Fr guiding catheters were successfully used in combination with the device. The lower profile facilitated a good exchange and delivery of the device, without the need for balloon pre-dilatations in 2 cases. This resulted in a limited subintimal plane, enabling a smooth puncture into the true lumen. One case presented with extreme levels of calcification and tortuosity, resulting in a high degree of friction, despite the lower catheter profile. No in-hospital coronary or access site-related complications occurred. CONCLUSIONS This case report illustrates the feasibility of the Stingray LP catheter for the treatment of CTOs via the ADR technique. The lower profile of the catheter potentially increases the deliverability, safety, and exchangeability of the device.

  8. Urinary catheters

    MedlinePlus

    ... drainage bag. The condom catheter must be changed every day. INTERMITTENT CATHETERS You would use an intermittent catheter ... and the catheter itself with soap and water every day. Also clean the area after every bowel movement ...

  9. Interlocking Detachable Coil Embolization by Technique of Dumbbell-Shaped Framing and Filling and Bridge Formation Under Balloon Dilatation for Huge Conglomerate Pulmonary Arteriovenous Malformation

    SciTech Connect

    Kawai, Nobuyuki, E-mail: nobkawai@wakayama-med.ac.jp; Sato, Morio, E-mail: morisato@mail.wakayama-med.ac.jp; Minamiguchi, Hiroyuki, E-mail: hiromina4@hotmail.com

    A 60-year-old woman presented with a conglomerate pulmonary arteriovenous malformation (PAVM) size 8.2 Multiplication-Sign 7.2 cm on chest X-ray. Feeding arteries were A{sub a}{sup 7} and A{sub b}{sup 7}, A{sup 8}, and A{sup 10}. The diameter and length of the A{sub b}{sup 7} neck were 15.5 and 16 mm, respectively. After percutaneous transcatheter embolization of A{sup 8} and A{sup 10}, PTE of A{sub a}{sup 7} and A{sub b}{sup 7} was conducted under balloon occlusion with interlocking detachable coils using a technique of dumbbell-shaped framing and filling, making a bridge from A{sub b}{sup 7} to the trunk of A{sup 9} andmore » A{sup 10}across A{sup 7}. Follow-up computed tomography 10 months after treatment showed marked shrinkage of the PAVM.« less

  10. Catheter enterostomy and patch repair of the abdominal wall for gastroschisis with intestinal atresia: report of a case.

    PubMed

    Ohno, Koichi; Nakamura, Tetsuro; Azuma, Takashi; Yoshida, Tatsuyuki; Yamada, Hiroto; Hayashi, Hiroaki; Masahata, Kazunori

    2009-01-01

    A male infant, weighing 2177 g, was born with the entire intestine protruding through a defect on the right side of the navel. Intestinal atresia, approximately 70 cm from the Treitz ligament, was also confirmed. Primary anastomosis and abdominal wall repair were impossible because of the intestinal dilation and thick peel, as well as the small abdominal cavity. Thus, we initially performed catheter enterostomy with a 14-F balloon catheter and patch repair of the abdominal wall, to enable the baby to be fed. Secondary anastomosis and abdominal wall repair was safely performed when the baby was 106 days old. The combination of catheter enterostomy and patch repair of the abdominal wall does not require dissection of the intestine and it can be safely performed in low-birth-weight babies. It also enables feeding and weight gain, and the overlying skin prevents contamination of the artificial sheet. We recommend this combination for neonates with both gastroschisis and intestinal atresia.

  11. For patients with primary achalasia the clinical success of pneumatic balloon dilatation can be predicted from the residual fraction of radionuclide during esophageal transit scintigraphy.

    PubMed

    Jeon, Han Ho; Youn, Young Hoon; Rhee, Kwangwon; Kim, Jie-Hyun; Park, Hyojin; Conklin, Jeffrey L

    2014-02-01

    Esophageal transit scintigraphy (ETS) and esophagography have long been used to evaluate patients with achalasia. The objectives of our study were to evaluate the efficacy of endoscopic pneumatic dilatation (EPD) as treatment for Koreans with achalasia and to determine which findings from ETS and esophagography predict successful treatment of achalasia. Patients with achalasia who were treated by EPD between April 2002 and January 2012 were recruited. We defined the success of EPD as 6 months or more of clinical remission without symptoms or a decrease in the Eckardt scores by at least two points and a total Eckardt score not exceeding 3. We reviewed the percentage of maximum scintigraphic activity retained in the esophagus at 30 s (R 30) and the post-PD rate of reduction of R 30 ((Pre R 30 - Post R 30)/Pre R 30 × 100) by ETS. Possible predictive factors determined by ETS and esophagography were analyzed. Our study included 53 eligible patients. The median symptom score (Eckardt score) was 5 (4-8). R 30 and T 1/2 were, respectively, 61.8 % and 38.5 min before EPD and 20 % and 4.19 min after EPD. Successful EPD was achieved for 40 of 53 (75.47 %) patients. Age (≥40, p = 0.027) and post-PD rate of reduction of R 30 (>20 %, p = 0.003) were best prognostic indicators of clinical success. There were no perforations related to EPD. Older age and a post-PD rate of reduction of R 30 were strongly associated with better outcomes. Examination with ETS before and after EPD can be used to objectively assess a patient's short-term response to EPD.

  12. Monorail Piccolino catheter: a new rapid exchange/ultralow profile coronary angioplasty system.

    PubMed

    Mooney, M R; Douglas, J S; Mooney, J F; Madison, J D; Brandenburg, R O; Fernald, R; Van Tassel, R A

    1990-06-01

    The Monorail Piccolino coronary angioplasty balloon catheter (MBC) was evaluated on 118 patients at two centers. Technical success was achieved in 110 patients (93%). Time for catheter exchange and total fluoroscopy time were significantly lower for the Monorail catheter than with standard equipment (exchange time 97 vs. 170 seconds P less than .05 and fluoroscopy time 17 vs. 88 seconds P less than .001). The advantages of rapid exchange and the ability of utilize 2 Monorail balloon catheters through one 9F guiding catheter for simultaneous inflations allowed for maximal flexibility in treating patients with bifurcation lesions. The double wire approach utilizing one Monorail balloon catheter with a 7F guiding catheter was also technically successful. The Monorail Piccolino balloon catheter has unique features that allow for greater ease of operator use, rapid catheter exchange, and optimal angiographic visualization. It is felt that this catheter design provides distinct advantages over standard angioplasty equipment.

  13. Treatment of congenital tracheal stenosis by balloon-expandable metallic stents in paediatric intensive care unit

    PubMed Central

    Xu, Xuan; Li, Dandan; Zhao, Shuyu; Liu, Xicheng; Feng, Zhichun; Ding, Hui

    2012-01-01

    The aim of this study was to evaluate the use of balloon-expandable metallic stents in the treatment of children with congenital tracheal stenosis in whom conventional therapy has failed. From 2010 to 2011, balloon-expandable metallic stents were implanted into the trachea of eight infants aged 2–20 months in the paediatric intensive care unit. The infants had severe airway obstruction caused by congenital tracheal stenosis. Tracheal stents were placed after intraluminal balloon dilatation of the tracheal stenosis, inserted with balloon catheters and implanted into the desired position bronchoscopically. The stents were 12 to 29 mm long and 4 mm in diameter. Seven children were relieved of airway obstruction after this procedure. However, a child died due to severe sepsis after the placement of bronchial stents. No granulation tissue developed over the stents in any of the children. Stents have been in place for 1–6 months after insertion without any other complication. Balloon-expandable metallic stents are effective in relieving airway obstruction by congenital tracheal stenosis in children. This technique may provide an important remedy for congenital tracheal stenosis in children. PMID:22361127

  14. Determining the best catheter for sonohysterography.

    PubMed

    Dessole, S; Farina, M; Capobianco, G; Nardelli, G B; Ambrosini, G; Meloni, G B

    2001-09-01

    To compare the characteristics of six different catheters for performing sonohysterography (SHG) to identify those that offer the best compromise between reliability, tolerability, and cost. Prospective study. University hospital. Six hundred ten women undergoing SHG. We performed SHG with six different types of catheters: Foleycath (Wembley Rubber Products, Sepang, Malaysia), Hysca Hysterosalpingography Catheter (GTA International Medical Devices S.A., La Caleta D.N., Dominican Republic), H/S Catheter Set (Ackrad Laboratories, Cranford, NJ), PBN Balloon Hystero-Salpingography Catheter (PBN Medicals, Stenloese, Denmark), ZUI-2.0 Catheter (Zinnanti Uterine Injection; BEI Medical System International, Gembloux, Belgium), and Goldstein Catheter (Cook, Spencer, IN). We assessed the reliability, the physician's ease of use, the time requested for the insertion of the catheter, the volume of contrast medium used, the tolerability for the patients, and the cost of the catheters. In 568 (93%) correctly performed procedures, no statistically significant differences were found among the catheters. The Foleycath was the most difficult for the physician to use and required significantly more time to position correctly. The Goldstein catheter was the best tolerated by the patients. The Foleycath was the cheapest whereas the PBN Balloon was the most expensive. The choice of the catheter must be targeted to achieving a good balance between tolerability for the patients, efficacy, cost, and the personal preference of the operator.

  15. A new idea for a safer approach to the supra-aortic trunks: the Piton™ catheter.

    PubMed

    Setacci, C; Moratto, R; Sirignano, P; Setacci, F; Silingardi, R; Coppi, G

    2011-04-01

    Carotid artery disease is among the most common causes of stroke, and stroke is the third leading cause of death in industrialized countries. Thus the personal health and socioeconomic burden of carotid artery disease is significant. Carotid artery disease accounts for approximately 5-12% of new strokes in patients amenable to revascularization therapy. Atherosclerosis is the main reason for stroke and accounts for approximately one third of all cases. Carotid stenting is nowadays considered a valid standard alternative to surgical carotid endarterectomy, especially in patients having a high perioperative risk. The first carotid balloon angioplasty was carried out in 1979 and the first carotid balloon-expandable bare metal stents were implanted 10 years later, in 1989. However, carotid stenting at that time was associated with major complications, due to extrinsic compression and subsequent to the steel stents used. The Piton™ GC (carotid guide catheter) is intended to facilitate the introduction and placement of interventional devices (e.g., guidewires, stent delivery systems, dilation balloons, angiographic- or micro-catheters, etc.) into the human vasculature to treat vascular obstructive disease, including but not limited to the supra-aortic vessels.

  16. Technique of spinal cord compression induced by inflation of epidural balloon catheter in rabbits (Oryctologus cuniculus): efficient and easy to use model.

    PubMed

    Fonseca, Antonio F B DA; Scheffer, Jussara P; Coelho, Barbara P; Aiello, Graciane; Guimarães, Arthur G; Gama, Carlos R B; Vescovini, Victor; Cabral, Paula G A; Oliveira, André L A

    2016-09-01

    The most common cause of spinal cord injury are high impact trauma, which often result in some motor impairment, sensory or autonomic a greater or lesser extent in the distal areas the level of trauma. In terms of survival and complications due to sequelae, veterinary patients have a poor prognosis unfavorable. Therefore justified the study of experimental models of spinal cord injury production that could provide more support to research potential treatments for spinal cord injuries in medicine and veterinary medicine. Preclinical studies of acute spinal cord injury require an experimental animal model easily reproducible. The most common experimental animal model is the rat, and several techniques for producing a spinal cord injury. The objective of this study was to describe and evaluate the effectiveness of acute spinal cord injury production technique through inflation of Fogarty(r) catheter using rabbits as an experimental model because it is a species that has fewer conclusive publications and contemplating. The main requirements of a model as low cost, handling convenience, reproducibility and uniformity. The technique was adequate for performing preclinical studies in neuro-traumatology area, effectively leading to degeneration and necrosis of the nervous tissue fostering the emergence of acute paraplegia.

  17. Serial assessment of the index of microcirculatory resistance during primary percutaneous coronary intervention comparing manual aspiration catheter thrombectomy with balloon angioplasty (IMPACT study): a randomised controlled pilot study.

    PubMed

    Hoole, Stephen P; Jaworski, Catherine; Brown, Adam J; McCormick, Liam M; Agrawal, Bobby; Clarke, Sarah C; West, Nick E J

    2015-01-01

    Utilising a novel study design, we evaluated serial measurements of the index of microcirculatory resistance (IMR) in patients undergoing primary percutaneous coronary intervention (PPCI) for ST-segment elevation myocardial infarction (STEMI) to assess the impact of device therapy on microvascular function, and determine what proportion of microvascular injury is related to the PPCI procedure, and what is an inevitable consequence of STEMI. 41 patients undergoing PPCI for STEMI were randomised to balloon angioplasty (BA, n=20) or manual thrombectomy (MT, n=21) prior to stenting. Serial IMR measurements, corrected for collaterals, were recorded at baseline and at each stage of the procedure. Microvascular obstruction (MVO) and infarct size at 24 h and 3 months were measured by troponin and cardiac MRI (CMR). IMR did not change significantly following PPCI, but patients with lower IMR values (<32, n=30) at baseline had a significant increase in IMR following PPCI (baseline: 21.2±7.9 vs post-stent: 33.0±23.7, p=0.01) attributable to prestent IRA instrumentation (baseline: 21.7±8.0 vs post-BA or MT: 36.9±25.9, p=0.006). Post-stent IMR correlated with early MVO on CMR (p=0.01). There was no significant difference in post-stent IMR, presence of early MVO or final infarct size between patients with BA and patients treated with MT. Patients with STEMI and less microcirculatory dysfunction may be susceptible to acute iatrogenic microcirculatory injury from prestent coronary devices. MT did not appear to be superior to BA in maintaining microcirculatory integrity when the guide wire partially restores IRA flow during PPCI. ISRCTN31767278.

  18. Renal denervation with a percutaneous bipolar radiofrequency balloon catheter in patients with resistant hypertension: 6-month results from the REDUCE-HTN clinical study.

    PubMed

    Sievert, Horst; Schofer, Joachim; Ormiston, John; Hoppe, Uta C; Meredith, Ian T; Walters, Darren L; Azizi, Michel; Diaz-Cartelle, Juan; Cohen-Mazor, Meital

    2015-02-01

    To evaluate the safety and efficacy of the balloon-based bipolar Vessix Renal Denervation System in treating patients with resistant hypertension. In this prospective, multicentre, single-arm study, 146 patients (age 58.6±10.5 years; 61% men) with office systolic blood pressure (BP) ≥160 mmHg despite ≥3 antihypertensive medications at maximally tolerated doses were treated with the Vessix System. Efficacy endpoints were reductions in office and 24-hour ambulatory systolic and diastolic BPs at six months. Acute and long-term safety, with a focus on the renal artery and estimated glomerular filtration rate (eGFR), were assessed. Baseline office and ambulatory BPs were 182.4±18.4/100.2±14.0 mmHg and 153.0±15.1/87.5±13.2 mmHg, respectively. No acute renal artery injury requiring intervention or serious periprocedural cardiovascular events occurred. At six months, office BP was reduced by 24.7±22.1/10.3±12.7 mmHg (p<0.0001) and ambulatory BP was reduced by 8.4±14.4/5.9±9.1 mmHg (N=69; p<0.0001). Twenty-six patients (18%) achieved an office systolic BP <140 mmHg. One patient had renal artery stenosis which required stenting. Mean eGFR remained stable. Renal artery denervation with the Vessix System reduced both office and ambulatory BP at six months in patients with resistant hypertension. Renal artery safety and renal function results are favourable.

  19. Fracture, inflation and floatation embolisation of PTCA balloon.

    PubMed

    O'Neill, Louisa; Sowbhaga, Vinay; Owens, Patrick

    2015-01-09

    This case outlines an unusual complication of coronary intervention, the likely mechanisms leading to this and possible retrieval options. It is the first case to the best of our knowledge reporting this complication. A 78-year-old Caucasian man underwent coronary stenting. During the procedure kinking and subsequent fracture of a non-compliant percutaneous transluminal coronary angioplasty (PTCA) balloon occurred. Injection of contrast down the guide to opacify the coronary arteries resulted in 'inflation' of the balloon with air, and embolisation of the inflated balloon into the proximal left anterior descending artery. The embolised balloon was retrieved by removal of the guide catheter and wire as a unit. The patient had a good angiographic outcome. This case highlights risks associated with usage of kinked balloons catheters, and describes for the first time to our knowledge, the inflation of a PTCA balloon with air from its shaft within the catheter, causing 'floatation' embolisation into the coronary artery. 2015 BMJ Publishing Group Ltd.

  20. Novel use of tissue expander for dilation of oropharyngeal stenosis.

    PubMed

    Banerjee, Debdeep; Wang, James C; Demke, Joshua C

    2014-11-01

    Naso/oropharyngeal stenoses are uncommon surgical complications. We present a child having undergone previous adenoidectomy without complication who developed naso/oropharyngeal scarring after subsequent tonsillectomy. She presented with nasal obstruction and frequent gasping at night worrisome for obstructive sleep apnea. Scar was initially excised and the defect allografted. Conventional esophageal dilators were undersized, and ultimately a tissue expander was used intraoperatively as a balloon dilator. The patient's symptoms and sleep apnea resolved. We found use of a tissue expander as a balloon dilator to be at least minimally effective in dilating the oropharynx when all other methods at our disposal proved ineffective. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  1. Dilated cardiomyopathy

    MedlinePlus

    ... other causes of dilated cardiomyopathy, including: Alcohol or cocaine abuse Diabetes, thyroid disease, or hepatitis Medicines that ... how much salt (sodium) you get in your diet. Most people who have heart failure need to ...

  2. Current trends of balloon laryngoplasty in Thailand.

    PubMed

    Moungthong, Greetha; Bunbanjerdsuk, Sacarin; Wright, Nida; Sathavornmanee, Thanakrit; Setabutr, Dhave

    2017-06-01

    To describe the current trend in balloon laryngoplasty usage and experience by practicing otolaryngologists in Thailand. Anonymous 11 question online and paper survey of otolaryngologists on their current balloon laryngoplasty practices. Current practices and experience in balloon laryngoplasty were queried with multiple choice and open-ended questions. Laser use is the most commonly utilized instrument to treat airway stenosis in Thailand. 86% of respondents do not have experience with balloon dilatation; yet, almost half (47.6%) report they perform a minimum of five airway surgeries per year. Most respondents had been in practice for less than 6 years (41%) and reported that they did not have exposure to balloon use during residency training. The largest barrier reported for the use of balloon instrumentation in the airway is inexperience (44.4%) followed by cost (38.3%), yet most feel that treatment in airway stenosis could benefit by usage of balloons (95.5%). Most otolaryngologists in Thailand do not have experience with the use of balloon dilatation and lack of exposure remains the largest barrier to its use. Otolaryngologists in Thailand feel that increased usage of balloons in the airway could improve airway stenosis treatment in the country.

  3. Congenital duodenal web: successful management with endoscopic dilatation

    PubMed Central

    Poddar, Ujjal; Jain, Vikas; Yachha, Surender Kumar; Srivastava, Anshu

    2016-01-01

    Background and study aims: Congenital duodenal web (CDW) is an uncommon cause of duodenal obstruction and endoscopic balloon dilatation has been reported in just eight pediatric cases to date. Here we are reporting three cases of CDW managed successfully with balloon dilatation. Cases and methods: In 2014 we diagnosed three cases of CDW on the basis of typical radiological and endoscopic findings. Endoscopic balloon dilatation was done under conscious sedation with a through-the-scope controlled radial expansion (CRE) balloon. Results: All three children presented late (median age 8 [range 2 – 9] years) with bilious vomiting, upper abdominal distension, and failure to thrive. One of them had associated Down syndrome and another had horseshoe kidney. In all cases, CDW was observed in the second part of the duodenum beyond the ampulla, causing partial duodenal obstruction. After repeated endoscopic dilatation (2 – 4 sessions), all three patients became asymptomatic. None of the patients experienced complications after balloon dilatation. Conclusions: Duodenal diaphragm should be suspected in patients with abdominal distension with bilious vomiting, even in relatively older children. Endoscopic balloon dilatation is a simple and effective method of treating this condition. PMID:27004237

  4. Balloons Revisited

    ERIC Educational Resources Information Center

    Jeskova, Z.; Featonby, D.; Fekova, V.

    2012-01-01

    Whilst everyone is familiar with the process of blowing up a balloon, few of us have gone further to quantify the actual pressures involved at different stages in the inflation process. This paper seeks to describe experiments to fill some of those gaps and examine some of the apparently anomalous behaviour of connected balloons. (Contains 12…

  5. Successful percutaneous coronary intervention with GuideLiner® catheter for subtotal occlusive lesion in the right coronary artery with anomalous origin from the left sinus of Valsalva: a case report.

    PubMed

    Shirota, Ayumi; Nomura, Tetsuya; Kubota, Hiroshi; Taminishi, Shunta; Urata, Ryota; Sugimoto, Takeshi; Higuchi, Yusuke; Kato, Taku; Keira, Natsuya; Tatsumi, Tetsuya

    2015-07-28

    Because of the unusual anatomy of an anomalous origin of the right coronary artery from the left sinus of Valsalva, selective cannulation of the guiding catheter in percutaneous coronary intervention for these cases is always challenging. A 58-year-old Japanese man was admitted to our hospital complaining of worsening exertional chest pain. He was suspected of having unstable angina pectoris and underwent cardiac catheterization. We found a subtotal occlusive lesion in the mid-portion of his right coronary artery that originated from the left sinus of Valsalva. On the previous percutaneous coronary intervention, we failed to cannulate the guiding catheter to the anomalous orifice of the right coronary artery. Therefore, we decided to use the GuideLiner catheter for stable back-up support from the beginning. A 6Fr GuideLiner catheter was introduced into the right coronary artery by anchoring it coaxially with a semi-compliant balloon catheter. And we successfully deployed two drug-eluting stents by crossing over the posterior-descending artery. Final angiography demonstrated favorable dilatation of the target lesion, and native blood flow in the right coronary artery was completely recovered. GuideLiner is a monorail-type "child" support catheter that facilitates coaxial guiding catheter engagement and an appropriate back-up force, achieving successful device delivery to target lesions in this kind of complex percutaneous coronary intervention.

  6. Paraspinal arteriovenous malformation Onyx embolization via an Ascent balloon.

    PubMed

    Martínez-Galdámez, Mario; Rodriguez-Arias, Carlos A; Utiel, Elena; Arreba, Emilio; Gonzalo, Miguel; Arenillas, Juan F

    2013-03-22

    Purely extradural lumbar spinal arteriovenous malformations (AVMs) are rare lesions that have diverse presentations and imaging features. The treatment of a symptomatic high flow paraspinal AVM with multiple feeders remains a challenge. We report the first use of an Ascent balloon (dual lumen balloon catheter) to deliver Onyx with excellent penetration to a paraspinal AVM.

  7. Paraspinal arteriovenous malformation Onyx embolization via an Ascent balloon

    PubMed Central

    Martínez-Galdámez, Mario; Rodriguez-Arias, Carlos A; Utiel, Elena; Arreba, Emilio; Gonzalo, Miguel; Arenillas, Juan F

    2013-01-01

    Purely extradural lumbar spinal arteriovenous malformations (AVMs) are rare lesions that have diverse presentations and imaging features. The treatment of a symptomatic high flow paraspinal AVM with multiple feeders remains a challenge. We report the first use of an Ascent balloon (dual lumen balloon catheter) to deliver Onyx with excellent penetration to a paraspinal AVM. PMID:23524491

  8. Paraspinal arteriovenous malformation Onyx embolization via an Ascent balloon.

    PubMed

    Martínez-Galdámez, Mario; Rodriguez-Arias, Carlos A; Utiel, Elena; Arreba, Emilio; Gonzalo, Miguel; Arenillas, Juan F

    2014-04-01

    Purely extradural lumbar spinal arteriovenous malformations (AVMs) are rare lesions that have diverse presentations and imaging features. The treatment of a symptomatic high flow paraspinal AVM with multiple feeders remains a challenge. We report the first use of an Ascent balloon (dual lumen balloon catheter) to deliver Onyx with excellent penetration to a paraspinal AVM.

  9. Hydrophilic Catheters

    PubMed Central

    2006-01-01

    Executive Summary Objective To review the evidence on the effectiveness of hydrophilic catheters for patients requiring intermittent catheterization. Clinical Need There are various reasons why a person would require catheterization, including surgery, urinary retention due to enlargement of the prostate, spinal cord injuries, or other physical disabilities. Urethral catheters are the most prevalent cause of nosocomial urinary tract infections, that is, those that start or occur in a hospital. A urinary tract infection (UTI) occurs when bacteria adheres to the opening of the urethra. Most infections arise from Escherichia coli, from the colon. The bacteria spread into the bladder, resulting in the development of an infection. The prevalence of UTIs varies with age and sex. There is a tenfold increase in incidence for females compared with males in childhood and throughout adult life until around 55 years, when the incidence of UTIs in men and women is equal, mostly as a consequence of prostatic problems in men. Investigators have reported that urethritis (inflammation of the urethra) is found in 2% to 19% of patients practising intermittent catheterization. The Technology Hydrophilic catheters have a polymer coating that binds o the surface of the catheter. When the polymer coating is submersed in water, it absorbs and binds the water to the catheter. The catheter surface becomes smooth and very slippery. This slippery surface remains intact upon insertion into the urethra and maintains lubrication through the length of the urethra. The hydrophilic coating is designed to reduce the friction, as the catheter is inserted with the intention of reducing the risk of urethral damage. It has been suggested that because the hydrophilic catheters do not require manual lubrication they are more sterile and thus less likely to cause infection. Most hydrophilic catheters are prepackaged in sterile water, or there is a pouch of sterile water that is broken and released into the

  10. Immediate Outcome of Balloon Mitral Valvuloplasty with JOMIVA Balloon during Pregnancy

    PubMed Central

    Ramasamy, Ramona; Kaliappan, Tamilarasu; Gopalan, Rajendiran; Palanimuthu, Ramasmy; Anandhan, Premkrishna

    2017-01-01

    Introduction Rheumatic mitral stenosis is the most common Valvular Heart Disease encountered during pregnancy. Balloon Mitral Valvuloplasty (BMV) is one of the treatment option available if the symptoms are refractory to the medical management and the valve anatomy is suitable for balloon dilatation. BMV with Inoue balloon is the most common technique being followed worldwide. Over the wire BMV is a modified technique using Joseph Mitral Valvuloplasty (JOMIVA) balloon catheter which is being followed in certain centres. Aim To assess the immediate post procedure outcome of over the wire BMV with JOMIVA balloon. Materials and Methods Clinical and echocardiographic parameters of pregnant women with significant mitral stenosis who underwent elective BMV with JOMIVA balloon in our institute from 2005 to 2015 were analysed retrospectively. Severity of breathlessness (New York Heart Association Functional Class), and duration of pregnancy was included in the analysis. Pre procedural echocardiographic parameters which included severity of mitral stenosis and Wilkin’s scoring were analysed. Clinical, haemodynamic and echocardiographic outcomes immediately after the procedure were analysed. Results Among the patients who underwent BMV in our Institute 38 were pregnant women. Twenty four patients (63%) were in New York Heart Association (NYHA) Class III. All of them were in sinus rhythm except two (5%) who had atrial fibrillation. Thirty four patients (89.5%) were in second trimester of pregnancy at the time of presentation and four (10.5%) were in third trimester. Echocardiographic analysis of the mitral valve showed that the mean Wilkin’s score was 7.3. Mean mitral valve area pre procedure was 0.8 cm2. Mean gradient across the valve was 18 mmHg. Ten patients (26.5%) had mild mitral regurgitation and none had more than mild mitral regurgitation. Thirty six patients had pulmonary hypertension as assessed by tricuspid regurgitation jet velocity. All of them underwent BMV

  11. Under Pressure: Intraluminal Filling Pressures of Postpartum Hemorrhage Tamponade Balloons

    PubMed Central

    Antony, Kathleen M.; Racusin, Diana A.; Belfort, Michael A.; Dildy, Gary A.

    2017-01-01

    Objective Uterine tamponade by fluid-filled balloons is now an accepted method of controlling postpartum hemorrhage. Available tamponade balloons vary in design and material, which affects the filling attributes and volume at which they rupture. We aimed to characterize the filling capacity and pressure-volume relationship of various tamponade balloons. Study Design Balloons were filled with water ex vivo. Intraluminal pressure was measured incrementally (every 10 mL for the Foley balloons and every 50 mL for all other balloons). Balloons were filled until they ruptured or until 5,000 mL was reached. Results The Foley balloons had higher intraluminal pressures than the larger-volume balloons. The intraluminal pressure of the Sengstaken-Blakemore tube (gastric balloon) was initially high, but it decreased until shortly before rupture occurred. The Bakri intraluminal pressure steadily increased until rupture occurred at 2,850 mL. The condom catheter, BT-Cath, and ebb all had low intraluminal pressures. Both the BT-Cath and the ebb remained unruptured at 5,000 mL. Conclusion In the setting of acute hemorrhage, expeditious management is critical. Balloons that have a low intraluminal pressure-volume ratio may fill more rapidly, more easily, and to greater volumes. We found that the BT-Cath, the ebb, and the condom catheter all had low intraluminal pressures throughout filling. PMID:28497006

  12. [Results of percutaneous transluminal dilatation of cerebral vascular stenoses].

    PubMed

    Kachel, R; Ritter, H; Grossmann, K; Glaser, F H

    1986-03-01

    The present paper is a review of 37 successful catheter dilatations of supra-aortic vascular stenoses. There were sixteen patients with a total of 21 stenoses of the internal carotid, vertebral artery or common carotid artery and sixteen patients with subclavian stenoses. Amongst the patients with stenoses of the cerebral vessels, there were ten with multiple lesions and six with a single stenosis. Three patients had successful dilatations of bilateral stenoses. The indications, technique, and complications of catheter dilatation of lesions of the cerebral vessels are described and discussed.

  13. A New Alternative for Difficult Ureter in Adult Patients: No Need to Dilate Ureter via a Balloon or a Stent with the Aid of 4.5F Semirigid Ureteroscope.

    PubMed

    Söylemez, Haluk; Yıldırım, Kadir; Utangac, Mehmet Mazhar; Aydoğan, Tahsin Batuhan; Ezer, Mehmet; Atar, Murat

    2016-06-01

    To investigate the effectivity of 4.5F ultrathin ureteroscope (UT-URS) without any need for active or passive dilation in the treatment of adult patient population in whom ureteral orifices cannot be engaged using conventional URS. Among a total of 512 adult patients who had undergone URS between April 2012 and November 2015 in our department for diagnostic or therapeutic purposes, 43 (8.4%) patients required ureteral dilation because we could not engage ureteral orifice. In adult patients in whom we could not engage ureteral orifice with 7.5F and 8F semirigid URS, we tried to complete the operation using 4.5F UT-URS without resorting to dilation. Age and gender of the patients, indication for operation, stone size, location, operative times, laterality of stone(s), stone-free rates, length of hospital stay, and complications were recorded. Mean age of the patients was 34.5 ± 11.2 (21-66) years. The patients had undergone operations for ureteral stone (n = 39), unexplained hydronephrosis (n = 2), and ureteral stenosis (n = 2). Mean stone size was 8.2 ± 2.3 (4-18) mm. Mean operative time was 64.2 ± 13.5 minutes. In 37 of 39 patients, a complete stone-free rate (94.8%) was achieved. Mean length of hospital stay was 8.9 ± 5.8 hours. It has been demonstrated that in an adult patient population in whom ureteral orifices cannot be engaged using conventional URS, ureteral access could be achieved with 4.5F UT-URS without any need for dilation. At the same time, use of 4.5F UT-URS resulted in an acceptable treatment success and lower complication rates in most of these patients without the need for a second session.

  14. Balloon Sculpture

    ERIC Educational Resources Information Center

    Warwick, James F.

    1976-01-01

    For the adventurous teacher and student there is an alternative to the often messy mixing, pouring, casting, cutting, scoring and sanding of plaster of Paris for casting or sculptural projects. Balloon sculpture, devised, designed and shown here by a sculptor/teacher, is an eye appealing sculptural form and holds a strong interest for students.…

  15. Cosmic Balloons

    ERIC Educational Resources Information Center

    El Abed, Mohamed

    2014-01-01

    A team of French high-school students sent a weather balloon into the upper atmosphere to recreate Viktor Hess's historical experiment that demonstrated the existence of ionizing radiation from the sky--later called cosmic radiation. This discovery earned him the Nobel Prize for Physics in 1936.

  16. [Pneumatic dilation in the treatment of achalasia].

    PubMed

    Ruiz Cuesta, Patricia; Hervás Molina, Antonio José; Jurado García, Juan; Pleguezuelo Navarro, María; García Sánchez, Valle; Casáis Juanena, Luis L; Gálvez Calderón, Carmen; Naranjo Rodríguez, Antonio

    2013-10-01

    Pneumatic dilation and surgical myotomy are currently the procedures of choice to treat achalasia. The selection of one or other treatment depends on the experience of each center and patient preferences. To review the experience of pneumatic dilation in patients with achalasia in our center. We included all patients with a clinical, endoscopic and manometric diagnosis compatible with achalasia who underwent pneumatic dilation in a 19-year period. All dilations were routinely performed with a Rigiflex(®) balloon, usually at pressures of 250, 250 and 300mm Hg in three inflations of one minute, each separated by one minute. The success of the dilation was assessed on the basis of the patient's symptoms, the number of sessions, the need for surgery, and the presence of complications. A total of 171 patients were included, 53.2% men and 46.8% women, with a mean age of 51.53±17.78 years (16-87 years), from June 1993 to October 2012. A 35-mm balloon was used in 157 patients, a 30-mm balloon in 9 patients and a 40-mm balloon in 7 patients. A single dilation session was required in 108 patients, two sessions were required in 56 patients, with a mean time between the first and second sessions of 25.23±43.25 months (1-215 months), and 3 sessions were required in 7 patients with a mean time between the second and third sessions of 6.86±5.33 months (1-15 months). Outcome after dilation was successful in 81% of the patients. Of the 140 responders, 121 had complete response (complete disappearance of symptoms without recurrence) and 19 partial response (initial disappearance of symptoms with subsequent reappearance). Surgery (Heller myotomy) was required in 15.8% of the patients. Perforation occurred in 4 of the 171 patients as a complication of the technique; these perforations were satisfactorily resolved, two by conservative treatment and two by surgery. There was no mortality associated with the technique or its complications. In our series, pneumatic dilation had a

  17. Cerebrospinal fluid enhancement on fluid attenuated inversion recovery images after carotid artery stenting with neuroprotective balloon occlusions: hemodynamic instability and blood-brain barrier disruption.

    PubMed

    Ogami, Ryo; Nakahara, Toshinori; Hamasaki, Osamu; Araki, Hayato; Kurisu, Kaoru

    2011-10-01

    A rare complication of carotid artery stenting (CAS), prolonged reversible neurological symptoms with delayed cerebrospinal fluid (CSF) space enhancement on fluid attenuated inversion recovery (FLAIR) images, is associated with blood-brain barrier (BBB) disruption. We prospectively identified patients who showed CSF space enhancement on FLAIR images. Nineteen patients-5 acute-phase and 14 scheduled-underwent 21 CAS procedures. Balloon catheters were navigated across stenoses, angioplasty was performed using a neuroprotective balloon, and stents were placed with after dilation under distal balloon protection. CSF space hyperintensity or obscuration on FLAIR after versus before CAS indicated CSF space enhancement. Correlations with clinical factors were examined. CSF space was enhanced on FLAIR in 12 (57.1%) cases. Postprocedural CSF space enhancement was significantly related to age, stenosis rate, acute-stage procedure, and total occlusion time. All acute-stage CAS patients showed delayed enhancement. Only age was associated with delayed CSF space enhancement in scheduled CAS patients. Ischemic intolerance for severe carotid artery stenosis and temporary neuroprotective balloon occlusion, causing reperfusion injury, seem to be the main factors that underlie BBB disruption with delayed CSF space enhancement shortly after CAS, rather than sudden poststenting hemodynamic change. Our results suggest that factors related to hemodynamic instability or ischemic intolerance seem to be associated with post-CAS BBB vulnerability. Patients at risk for hemodynamic instability or with ischemic intolerance, which decrease BBB integrity, require careful management to prevent intracranial hemorrhagic and other post-CAS complications.

  18. Treatment of Ureterointestinal Anastomotic Strictures by Diathermal or Cryoplastic Dilatation

    SciTech Connect

    Orsi, Franco; Penco, Silvia; Matei, Victor

    2007-09-15

    Background. Ureterointestinal anastomotic strictures (UAS) complicate 10-15% of surgeries for urinary diversion and are the main cause of deterioration in renal function. Treatments are surgical revision, management with autostatic stent, balloon dilatation, endoscopic incision, and percutaneous transrenal diathermy (Acucise). A new option is cryoplastic dilatation (Polar-Cath). Purpose. To assess the feasibility, complications, and preliminary results of UAS treatment using the Acucise and Polar-Cath systems. Methods. Nineteen UAS, diagnosed by ultrasonography or computed tomography and sequential renal scintigraphy, occurred in 15 cancer patients after radical cystectomy and urinary diversion. Fifteen were managed with balloon diathermy and 4 by balloon cryoplasty inmore » a three-stage procedure-percutaneous nephrostomy, diathermal or cryoplastic dilatation, and transnephrostomic control with nephrostomy removal-each separated by 15 days. All patients gave written informed consent. Results. Dilatations were successful in all cases. The procedure is simple and rapid (about 45 min) under fluoroscopic control and sedation. Procedural complications occurred in 1 (5%) patient with UAS after Wallace II uretero-ileocutaneostomy: a common iliac artery lesion was induced by diathermal dilatation, evident subsequently, and required surgical repair. Patency with balloon diathermy was good, with two restenoses developing over 12 months (range 1-22) of follow-up. With balloon cryoplastic dilatation, one restenosis developed in the short term; follow-up is too brief to assess the long-term efficacy. Conclusion. Our short-term results with diathermal and cryoplastic dilatation to resolve UAS are good. If supported by longer follow-up, the techniques may be considered as first-choice approaches to UAS. Surgery should be reserved for cases in which this minimally invasive technique fails.« less

  19. Balloons and Science Kit.

    ERIC Educational Resources Information Center

    Balloon Council, Washington, DC.

    This document provides background information on balloons including: (1) the history of balloons; (2) balloon manufacturing; (3) biodegradability; (4) the fate of latex balloons; and (5) the effect of balloons on the rainforest and sea mammals. Also included as part of this instructional kit are four fun experiments that allow students to…

  20. Newly Designed Y-configured Single-Catheter Stenting for the Treatment of Hilar-Type Nonanastomotic Biliary Strictures After Orthotopic Liver Transplantation

    SciTech Connect

    Wang Changming; Li Xuan, E-mail: lixuanbysy@163.com; Song Shibing

    2012-02-15

    Purpose: This study was designed to introduce our novel technique of percutaneous single catheter placement into the hilar bile ducts strictures while fulfilling the purpose of bilateral biliary drainage and stenting. We investigated the efficacy and safety of the technique for the treatment of hilar nonanastomotic biliary strictures. Methods: Ten patients who were post-orthotopic liver transplantation between July 2000 and July 2010 were enrolled in this study. Percutaneous Y-configured single-catheter stenting for bilateral bile ducts combined with balloon dilation was designed as the main treatment approach. Technical success rate, clinical indicators, complications, and recurrent rate were analyzed. Results: Technical successmore » rate was 100%. Nine of the ten patients had biochemical normalization, cholangiographic improvement, and clinical symptoms relief. None of them experienced recurrence in a median follow-up of 26 months after completion of therapy and removal of all catheters. Complications were minor and limited to two patients. The one treatment failure underwent a second liver transplantation but died of multiple system organ failure. Conclusions: Percutaneous transhepatic Y-configured single-catheter stenting into the hilar bile ducts is technically feasible. The preliminary trial of this technique combined with traditional PTCD or choledochoscopy for the treatment of hilar biliary strictures after orthotopic liver transplantation appeared to be effective and safe. Yet, further investigation is needed.« less

  1. Balloon-augmented Onyx embolization of cerebral arteriovenous malformations using a dual-lumen balloon: a multicenter experience.

    PubMed

    Spiotta, Alejandro M; James, Robert F; Lowe, Stephen R; Vargas, Jan; Turk, Aquilla S; Chaudry, M Imran; Bhalla, Tarun; Janjua, Rashid M; Delaney, John J; Quintero-Wolfe, Stacey; Turner, Raymond D

    2015-10-01

    Conventional Onyx embolization of cerebral arteriovenous malformations (AVMs) requires lengthy procedure and fluoroscopy times to form an adequate 'proximal plug' which allows forward nidal penetration while preventing reflux and non-targeted embolization. We review our experience with balloon-augmented Onyx embolization of cerebral AVMs using a dual-lumen balloon catheter technique designed to minimize these challenges. Retrospectively acquired data for all balloon-augmented cerebral AVM embolizations performed between 2011 and 2014 were obtained from four tertiary care centers. For each procedure, at least one Scepter C balloon catheter was advanced into the AVM arterial pedicle of interest and Onyx embolization was performed through the inner lumen after balloon inflation via the outer lumen. Twenty patients underwent embolization with the balloon-augmented technique over 24 discreet treatment episodes. There were 37 total arterial pedicles embolized with the balloon-augmented technique, a mean of 1.9 per patient (range 1-5). The treated AVMs were heterogeneous in their location and size (mean 3.3±1.6 cm). Mean fluoroscopy time for each procedure was 48±26 min (28 min per embolized pedicle). Two Scepter C balloon catheter-related complications (8.3% of embolization sessions, 5.4% of pedicles embolized) were observed: an intraprocedural rupture of a feeding pedicle and fracture and retention of a catheter fragment. This multicenter experience represents the largest reported series of balloon-augmented Onyx embolization of cerebral AVMs. The technique appears safe and effective in the treatment of AVMs, allowing more efficient and controlled injection of Onyx with a decreased risk of reflux and decreased fluoroscopy times. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  2. Clinical Evaluation of a Safety-device to Prevent Urinary Catheter Inflation Related Injuries.

    PubMed

    Davis, Niall F; Cunnane, Eoghan M; Mooney, Rory O'C; Forde, James C; Walsh, Michael T

    2018-05-01

    To evaluate the feasibility of a novel "safety-valve" device for preventing catheter related urethral trauma during urethral catheterization (UC). To assess the opinions of clinicians on the performance of the safety-valve device. A validated prototype "safety-valve" device for preventing catheter balloon inflation related urethral injuries was prospectively piloted in male patients requiring UC in a tertiary referral teaching hospital (n = 100). The device allows fluid in the catheter system to decant through an activated safety threshold pressure valve if the catheter anchoring balloon is misplaced. Users evaluated the "safety-valve" with an anonymous questionnaire. The primary outcome measurement was prevention of anchoring balloon inflation in the urethra. Secondary outcome measurement was successful inflation of urinary catheter anchoring balloon in the bladder. Patient age was 76 ± 12 years and American Society of Anaesthesiologists grade was 3 ± 1.4. The "safety-valve" was utilized by 34 clinicians and activated in 7% (n = 7/100) patients during attempted UC, indicating that the catheter anchoring balloon was incorrectly positioned in the patient's urethra. In these 7 cases, the catheter was successfully manipulated into the urinary bladder and inflated. 31 of 34 (91%) clinicians completed the questionnaire. Ten percent (n = 3/31) of respondents had previously inflated a urinary catheter anchoring balloon in the urethra and 100% (n = 31) felt that a safety mechanism for preventing balloon inflation in the urethra should be compulsory for all UCs. The safety-valve device piloted in this clinical study offers an effective solution for preventing catheter balloon inflation related urethral injuries. Copyright © 2018 Elsevier Inc. All rights reserved.

  3. Esophageal dilatation using the Eder Puestow dilators.

    PubMed

    Royston, C M; Dowling, B L; Gear, M W

    1976-06-01

    We have performed fifty-one dilatations in twenty-six patients using an end-viewing fiberoptic endoscope and Eder Puestow dilators. All (except two) were performed using intravenous diazepam, the majority on an outpatient basis. The only complication has been a single case of aspiration pneumonia. We have found this method of esophageal dilatation particularly useful in the preoperative dilatation of benign strictures, and in those elderly frail patients who are unsuitable for surgery. Transthoracic resection of the stricture is avoided and thus transabdominal repair of the hiatus hernia may be undertaken.

  4. Ballooning Then...and Ballooning Now.

    ERIC Educational Resources Information Center

    Journal of Aerospace Education, 1978

    1978-01-01

    Describes the history of hot-air balloon travel, starting with its French origins and continuing through to the 1978 national championship. An address for Balloon Federation of America membership is included. (MA)

  5. Fracture, inflation and floatation embolisation of PTCA balloon

    PubMed Central

    O'Neill, Louisa; Sowbhaga, Vinay; Owens, Patrick

    2015-01-01

    This case outlines an unusual complication of coronary intervention, the likely mechanisms leading to this and possible retrieval options. It is the first case to the best of our knowledge reporting this complication. A 78-year-old Caucasian man underwent coronary stenting. During the procedure kinking and subsequent fracture of a non-compliant percutaneous transluminal coronary angioplasty (PTCA) balloon occurred. Injection of contrast down the guide to opacify the coronary arteries resulted in ‘inflation’ of the balloon with air, and embolisation of the inflated balloon into the proximal left anterior descending artery. The embolised balloon was retrieved by removal of the guide catheter and wire as a unit. The patient had a good angiographic outcome. This case highlights risks associated with usage of kinked balloons catheters, and describes for the first time to our knowledge, the inflation of a PTCA balloon with air from its shaft within the catheter, causing ‘floatation’ embolisation into the coronary artery. PMID:25576524

  6. Quantity and location of aortic valve complex calcification predicts severity and location of paravalvular regurgitation and frequency of post-dilation after balloon-expandable transcatheter aortic valve replacement.

    PubMed

    Khalique, Omar K; Hahn, Rebecca T; Gada, Hemal; Nazif, Tamim M; Vahl, Torsten P; George, Isaac; Kalesan, Bindu; Forster, Molly; Williams, Mathew B; Leon, Martin B; Einstein, Andrew J; Pulerwitz, Todd C; Pearson, Gregory D N; Kodali, Susheel K

    2014-08-01

    This study sought to determine the impact of quantity and location of aortic valve calcification (AVC) on paravalvular regurgitation (PVR) and rates of post-dilation (PD) immediately after transcatheter aortic valve replacement (TAVR). The impact of AVC in different locations within the aortic valve complex is incompletely understood. This study analyzed 150 patients with severe, symptomatic aortic stenosis who underwent TAVR. Total AVC volume scores were calculated from contrast-enhanced multidetector row computed tomography imaging. AVC was divided by leaflet sector and region (Leaflet, Annulus, left ventricular outflow tract [LVOT]), and a combination of LVOT and Annulus (AnnulusLVOT). Asymmetry was assessed. Receiver-operating characteristic analysis was performed with greater than or equal to mild PVR and PD as classification variables. Logistic regression was performed. Quantity of and asymmetry of AVC for all regions of the aortic valve complex predicted greater than or equal to mild PVR by receiver-operating characteristic analysis (area under the curve = 0.635 to 0.689), except Leaflet asymmetry. Receiver-operating characteristic analysis for PD was significant for quantity and asymmetry of AVC in all regions, with higher area under the curve values than for PVR (area under the curve = 0.648 to 0.741). On multivariable analysis, Leaflet and AnnulusLVOT calcification were independent predictors of both PVR and PD regardless of multidetector row computed tomography area cover index. Quantity and asymmetry of AVC in all regions of the aortic valve complex predict greater than or equal to mild PVR and performance of PD, with the exception of Leaflet asymmetry. Quantity of AnnulusLVOT and Leaflet calcification independently predict PVR and PD when taking into account multidetector row computed tomography area cover index. Copyright © 2014 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.

  7. A comparison of two methods of endoscopic dilation of acute subglottic stenosis using a ferret model.

    PubMed

    Tubbs, Kyle J; Silva, Rodrigo C; Ramirez, Harvey E; Castleman, William L; Collins, William O

    2013-01-01

    Balloon dilation is accepted as a first line treatment of acute subglottic stenosis, but its effects on the subglottic tissue remain largely unknown. We aimed to develop an animal model of acute subglottic stenosis using endoscopic techniques. Once developed, this model was used to compare the immediate effects of balloon dilation and endotracheal tube dilation on subglottic tissue. Prospective randomized animal study. Acute subglottic injury was induced in 10 ferrets by endoscopic cauterization with silver nitrate. After 48-72 hours of observation, eight animals were randomized to undergo subglottic dilation with either a 5-mm balloon or endotracheal tubes of increasing diameter. These eight ferrets were euthanized within 10 minutes after dilation. The other two ferrets served as controls and were euthanized following observation only. The larynx from each ferret was harvested, and the subglottis was examined histologically by a pathologist blinded to the treatment arms. Acute subglottic stenosis was induced in all 10 ferrets using the endoscopic technique. Both balloon and endotracheal tube dilation resulted in comparable improvement in the subglottic airway diameter. A decreased thickness of submucosa/lamina propria was seen in the balloon dilation group. Acute subglottic stenosis can be reliably induced in ferrets using endoscopic techniques. Multiple dilation methods can be used to relieve acute obstruction. Balloon dilators seem to improve airway patency, in part, by decreasing the thickness of the submucosa and lamina propria. Further research is needed to determine how this impacts later stages of wound healing and final outcomes. Copyright © 2012 The American Laryngological, Rhinological, and Otological Society, Inc.

  8. [Thermal balloon endometrial ablation for dysfunctional uterine bleeding: technical aspects and results. A prospective cohort study of 152 cases].

    PubMed

    Kdous, Moez; Jacob, Denis; Gervaise, Amélie; Risk, Elie; Sauvanet, Eric

    2008-05-01

    Thermal balloon endometrial ablation is a new operative technique recently proposed in the treatment of dysfunctional uterine bleeding. To evaluate the efficacy of thermal balloon endometrial ablation in the treatment of dysfunctional uterine bleeding, and to identify the possible predictive factors for a successful outcome. A prospective study was conducted including 152 patients with chronic abnormal uterine bleeding refractory to medical treatment. All patients were treated by thermal balloon endometrial ablation (Thermachoice, Gynecare) between January 1, 1996 and December 31, 2003. patients were included if their uterine cavities sounded to less than 12 cm and had undergone hysteroscopy, pelvic ultrasound and endometrial biopsie showing no structural or (pre) malignant endometrial abnormalities. A balloon catheter was placed through the cervix and after inflation in the endometrial cavity with 5% dextrose in water, was heated to 87 +/- 5 degrees C. No one required cervical dilatation. Balloon pressures were 160 to 170 mm Hg. All patients underwent 8 minutes of therapy. The average patient was 47 years (range: 30-62 years) and was followed for a mean of 3 years and 7 months (range: 6 months - 8 years). 31.6% of women reported amennorhea, 16.5% hypomenorrhea and 21% eumenorrhea. Menorrhagea persisted in 11.2% of patients. No intraoperative complications and minor postoperative morbidity occured in 10.5% of patients. Three prgnancy complicated by spontaneous abortions were reported after the treatment. A total of 78% of women reported overall satisfaction with the endometrial ablation procedure and 18% were dissatisfied. 17.8% of patients underwent hysterectomy within 1 to 5 years of balloon endometrial ablation. Increasing age and menopause were significantly associated with increased odds of success (p < 0.05). Thermal balloon endometrial ablation is a simple, easy, effective, and minimally invasive procedure in menhorragic women with no desire for further

  9. Energy from solar balloons

    SciTech Connect

    Grena, Roberto

    2010-04-15

    Solar balloons are hot air balloons in which the air is heated directly by the sun, by means of a black absorber. The lift force of a tethered solar balloon can be used to produce energy by activating a generator during the ascending motion of the balloon. The hot air is then discharged when the balloon reaches a predefined maximum height. A preliminary study is presented, along with an efficiency estimation and some considerations on possible realistic configurations. (author)

  10. Endovascular balloon-assisted embolization of intracranial and cervical arteriovenous malformations using dual-lumen coaxial balloon microcatheters and Onyx: initial experience.

    PubMed

    Jagadeesan, Bharathi D; Grigoryan, Mikayel; Hassan, Ameer E; Grande, Andrew W; Tummala, Ramachandra P

    2013-12-01

    Ethylene vinyl alcohol copolymer (Onyx) is widely used for the embolization of arteriovenous malformations (AVMs) of the brain, head, and neck. Balloon-assisted Onyx embolization may provide additional unique advantages in the treatment of AVMs in comparison with traditional catheter-based techniques. To report our initial experience in performing balloon-assisted AVM embolization for brain and neck AVMs with the use of the new Scepter-C and Scepter-XC coaxial dual-lumen balloon microcatheters. Balloon-assisted transarterial embolization was performed in a series of 7 patients with AVMs (4 with brain AVMs, 1 with a dural arteriovenous fistula, and 2 with neck AVMs) by using Onyx delivered through the lumen of Scepter-C or Scepter XC coaxial balloon microcatheters. Following the initial balloon-catheter navigation into a feeding artery and the subsequent inflation of the balloon, the embolization was performed by using Onyx 18, Onyx 34, or both. A total of 12 embolization sessions were performed via 17 arterial feeders in these 7 patients. In 1 patient, there was an arterial perforation from the inflation of the balloon; in all others, the embolization goals were successfully achieved with no adverse events. The balloon microcatheters showed excellent navigability, and there were no problems with retrieval or with the repeated inflation and deflation of the balloons. A proximal Onyx plug, which is crucial in many AVM embolizations, was not necessary with this technique. Additionally, fluoroscopy and procedural times seemed lower with this technique compared with conventional embolization methods.

  11. Catheter interventions for mitral stenosis in children: results and perspectives.

    PubMed

    Saxena, Anita

    2015-04-01

    Stenosis of the mitral valve most often occurs as a result of chronic rheumatic heart disease, causing thickening and fibrosis of the mitral valve apparatus. Rheumatic heart disease continues to be a major public health problem in several developing countries and mitral stenosis is also common in these regions. According to the reports from India and Africa, the disease tends to follow a rapidly progressive course in children. The treatment of choice is balloon dilatation of the mitral valve. Echocardiography is indispensable for this procedure. Before planning the procedure, it is essential to assess the suitability of balloon dilatation. Echocardiography performed during the procedure helps to decide whether the size of the balloon needs to be increased in case of inadequate relief of stenosis. Most published series have reported an immediate success rate of over 90% with balloon dilatation in children and young adults. With an increase in mitral valve area and improvement in functional class, the left atrial pressure and the transmitral gradients fall. These gratifying results are also reported from very young children of less than 12 years of age. It is recommended to start with a smaller balloon size and increase its size in a stepwise fashion to minimize complications. The complications, seen in about 1% to 2% of cases, include development of significant mitral regurgitation and hemopericardium, secondary to cardiac chamber perforation. The long-term results indicate slightly higher restenosis rates in children than in adults. Most children with restenosis can undergo successful repeat dilatation. © The Author(s) 2015.

  12. Pravastatin reduces Marfan aortic dilation.

    PubMed

    McLoughlin, Darren; McGuinness, Jonathan; Byrne, John; Terzo, Eloisa; Huuskonen, Vilhelmiina; McAllister, Hester; Black, Alexander; Kearney, Sinead; Kay, Elaine; Hill, Arnold D K; Dietz, Harry C; Redmond, J Mark

    2011-09-13

    The sequelae of aortic root dilation are the lethal consequences of Marfan syndrome. The root dilation is attributable to an imbalance between deposition of matrix elements and metalloproteinases in the aortic medial layer as a result of excessive transforming growth factor-beta signaling. This study examined the efficacy and mechanism of statins in attenuating aortic root dilation in Marfan syndrome and compared effects to the other main proposed preventative agent, losartan. Marfan mice heterozygous for a mutant allele encoding a cysteine substitution in fibrillin-1 (C1039G) were treated daily from 6 weeks old with pravastatin 0.5 g/L or losartan 0.6 g/L. The end points of aortic root diameter (n=25), aortic thickness, and architecture (n=10), elastin volume (n=5), dp/dtmax (maximal rate of change of pressure) (cardiac catheter; n=20), and ultrastructural analysis with stereology (electron microscopy; n=5) were examined. The aortic root diameters of untreated Marfan mice were significantly increased in comparison to normal mice (0.161 ± 0.001 cm vs 0.252 ± 0.004 cm; P<0.01). Pravastatin (0.22 ± 0.003 cm; P<0.01) and losartan (0.221 ± 0.004 cm; P<0.01) produced a significant reduction in aortic root dilation. Both drugs also preserved elastin volume within the medial layer (pravastatin 0.23 ± 0.02 and losartan 0.29 ± 0.03 vs untreated Marfan 0.19 ± 0.02; P=0.01; normal mice 0.27 ± 0.02). Ultrastructural analysis showed a reduction of rough endoplasmic reticulum in smooth muscle cells with pravastatin (0.022 ± 0.004) and losartan (0.013 ± 0.001) compared to untreated Marfan mice (0.035 ± 0.004; P<0.01). Statins are similar to losartan in attenuating aortic root dilation in a mouse model of Marfan syndrome. They appear to act through reducing the excessive protein manufacture by vascular smooth muscle cells, which occurs in the Marfan aorta. As a drug that is relatively well-tolerated for long-term use, it may be useful clinically.

  13. Spiculated Bladder Calculi: The Culprit for Repeated Catheter Failure

    PubMed Central

    Wek, C.; Fox, T. P.; Muir, G. H.

    2013-01-01

    We report on the case of a frustrated 90-year-old gentleman who was seen in the Accident and Emergency department for the third time in four days with failure of his long-term urethral catheter. He reported that the catheter simply “fell out” with the balloon deflated. On each occasion previously, the catheter had been reinserted in A&E and the patient discharged home. These repeated visits to A&E were understandably a source of much frustration for the patient and his family. On the third presentation, plain abdominal radiography demonstrated a large spiculated bladder calculus. PMID:23984173

  14. Intravascular Raman spectroscopic catheter for molecular diagnosis of atherosclerotic coronary disease

    NASA Astrophysics Data System (ADS)

    Komachi, Yuichi; Sato, Hidetoshi; Tashiro, Hideo

    2006-10-01

    An intravascular catheter for Raman spectroscopic detection and analysis of coronary atherosclerotic disease has been developed. The catheter, having an outer diameter of 2 mm, consisted of a side-view-type micro-Raman probe, an imaging fiber bundle, a working channel (injection drain), and a balloon. By inflating the balloon, the probe was brought close to the inner wall of a modeled blood flow system and detected a phantom target buried in the wall. Results obtained demonstrate the possibility of using the spectroscopic catheter for molecular diagnosis of coronary lesions.

  15. Temporary Percutaneous Aortic Balloon Occlusion to Enhance Fluid Resuscitation Prior to Definitive Embolization of Post-Traumatic Liver Hemorrhage

    SciTech Connect

    Matsuoka, Shin; Uchiyama, Katsuhiro; Shima, Hideki

    2001-07-15

    We successfully stabilized severe hemorrhagic shock following traumatic liver injury by percutaneous transcarotid supraceliac aortic occlusion with a 5 Fr balloon catheter. Then we were able to perform transfemoral embolization therapy of the hepatic arterial bleeding source. Transient aortic occlusion using a balloon catheter appears to be a useful adjunct in select cases where stabilization of the patient is necessary to allow successful selective embolization of the bleeding source.

  16. Garlicin attenuates reperfusion no-reflow in a catheter-based porcine model of acute myocardial infarction.

    PubMed

    Peng, Yang; Jiahui, Li; Aili, Li; Yong, Wang; Zaixiang, Shi; Yuannan, Ke; Xianlun, Li

    2012-08-01

    To evaluate whether garlicin can attenuate reperfusion no-reflow in a catheter-based porcine model of acute myocardial infarction (AMI). Twenty-two swine were used: six in a sham-operation group, and eight each in the control and garlicin groups. The distal part of the left anterior descending coronary artery (LAD) in the latter two groups was occluded by a dilated balloon for 2 hr, then reperfused for 3 hr. Garlicin (1.88mg/kg) was injected just before reperfusion until reperfusion for 1 hr in the garlicin group. Hemodynamic data were examined before AMI, 2 hr after occlusion, and 3 hr after reperfusion. Myocardial contrast echocardiography (MCE) and pathological staining were performed to evaluate the myocardial no-reflow area (NRA). Serum proinflammatory cytokines and endothelin (ET)-1 were examined by radioimmunoassay. Left ventricular systolic pressure (LVSP) and left ventricular end-diastolic pressure (LVEDP) significantly improved in the garlicin group after reperfusion compared with the control group and also 2hr after AMI (p<0.05 for both). MCE and pathological staining both showed garlicin attenuated reperfusion NRA after AMI (p<0.05, p<0.01). Garlicin not only decreased serum interleukin (IL)-6 and tumor necrosis factor (TNF)-α after reperfusion (p<0.05 for both), but also ET-1 level (p<0.01). Garlicin attenuated reperfusion no-reflow in our catheter-based porcrine model of AMI, possibly through decreasing serum proinflammatory cytokines and ET-1.

  17. Percutaneous Transhepatic Cutting Balloon Papillotomy for Removal of Common Bile Duct Stones

    SciTech Connect

    Oguzkurt, Levent, E-mail: loguzkurt@yahoo.com; Ozkan, Ugur; Gumus, Burcak

    2009-09-15

    We report the case of a 66-year-old female who presented with jaundice secondary to recurrent adenocarcinoma of the gallbladder and several common bile duct stones. Percutaneous papillary dilatation was planned to remove the common bile duct stones. Papilla was dilated through the percutaneous approach with an 8-mm peripheral cutting balloon instead of a standard balloon. All the stones were pushed successfully into the duodenum with a saline flush. No complications were encountered. Use of a peripheral cutting balloon for dilatation of the papilla seems to be safe and effective because it has the advantage of controlled incision and dilatation ofmore » the target at low pressures.« less

  18. Hemodialysis Tunneled Catheter Noninfectious Complications

    PubMed Central

    Miller, Lisa M.; MacRae, Jennifer M.; Kiaii, Mercedeh; Clark, Edward; Dipchand, Christine; Kappel, Joanne; Lok, Charmaine; Luscombe, Rick; Moist, Louise; Oliver, Matthew; Pike, Pamela; Hiremath, Swapnil

    2016-01-01

    Noninfectious hemodialysis catheter complications include catheter dysfunction, catheter-related thrombus, and central vein stenosis. The definitions, causes, and treatment strategies for catheter dysfunction are reviewed below. Catheter-related thrombus is a less common but serious complication of catheters, requiring catheter removal and systemic anticoagulation. In addition, the risk factors, clinical manifestation, and treatment options for central vein stenosis are outlined. PMID:28270922

  19. Cerebrospinal Fluid Enhancement on Fluid Attenuated Inversion Recovery Images After Carotid Artery Stenting with Neuroprotective Balloon Occlusions: Hemodynamic Instability and Blood-Brain Barrier Disruption

    SciTech Connect

    Ogami, Ryo, E-mail: ogami.r@mazda.co.jp; Nakahara, Toshinori; Hamasaki, Osamu

    2011-10-15

    Purpose: A rare complication of carotid artery stenting (CAS), prolonged reversible neurological symptoms with delayed cerebrospinal fluid (CSF) space enhancement on fluid attenuated inversion recovery (FLAIR) images, is associated with blood-brain barrier (BBB) disruption. We prospectively identified patients who showed CSF space enhancement on FLAIR images. Methods: Nineteen patients-5 acute-phase and 14 scheduled-underwent 21 CAS procedures. Balloon catheters were navigated across stenoses, angioplasty was performed using a neuroprotective balloon, and stents were placed with after dilation under distal balloon protection. CSF space hyperintensity or obscuration on FLAIR after versus before CAS indicated CSF space enhancement. Correlations with clinical factors weremore » examined. Results: CSF space was enhanced on FLAIR in 12 (57.1%) cases. Postprocedural CSF space enhancement was significantly related to age, stenosis rate, acute-stage procedure, and total occlusion time. All acute-stage CAS patients showed delayed enhancement. Only age was associated with delayed CSF space enhancement in scheduled CAS patients. Conclusions: Ischemic intolerance for severe carotid artery stenosis and temporary neuroprotective balloon occlusion, causing reperfusion injury, seem to be the main factors that underlie BBB disruption with delayed CSF space enhancement shortly after CAS, rather than sudden poststenting hemodynamic change. Our results suggest that factors related to hemodynamic instability or ischemic intolerance seem to be associated with post-CAS BBB vulnerability. Patients at risk for hemodynamic instability or with ischemic intolerance, which decrease BBB integrity, require careful management to prevent intracranial hemorrhagic and other post-CAS complications.« less

  20. Evaluation of the Distribution of Paclitaxel After Application of a Paclitaxel-Coated Balloon in the Rabbit Urethra.

    PubMed

    Barbalias, Dimitrios; Lappas, Georgios; Ravazoula, Panagiotia; Liourdi, Despoina; Kyriazis, Iason; Liatsikos, Evangelos; Kallidonis, Panagiotis

    2018-05-01

    Urethral strictures are a common urologic problem that could require complex reconstructive procedures. Urethral dilatation represents a frequent practiced intervention associated with high recurrence rates. Drug-coated percutaneous angioplasty balloons (DCBs) with cytostatic drugs have been effectively used for the prevention of vascular restenosis after balloon dilatation. To reduce restenosis rates of urethral dilatation, these balloons could be used in the urethra. Nevertheless, the urothelium is different than the endothelium and these drugs may not be distributed to the outer layers of the urethra. Thus, an experiment was performed to evaluate the distribution of paclitaxel (PTX) in the rabbit urethra after the inflation of a PTX-coated balloon (PCB). Eleven rabbits underwent dilatation of the posterior urethra with common endoscopic balloons after urethrography. Nine of these rabbits were additionally treated with PCB. The urethras of the two control animals were removed along with three more dilated with PCB urethras immediately after the dilatation. The remaining of the urethras were removed after 24 (n = 3) and 48 hours (n = 3). The posterior segments of the urethras were evaluated with hematoxylin and eosin staining as well as with immunohistochemistry with polyclonal anti-PTX antibody. The two control specimens showed denudation of the urothelium after balloon dilatations and no PTX was observed. All specimens from dilated PCB urethras showed distribution of PTX to all layers of the urethra. The specimens that were immediately removed exhibited denudation of the urothelium without any inflammation. The specimens removed at 24 and 48 hours showed mild acute inflammation. PTX was distributed to the urothelial, submucosal, and smooth muscle layers of the normal rabbit urethra immediately after dilatation with a DCB. PTX and mild inflammation were present at the site 24 and 48 hours after the dilatation.

  1. Modified jailed balloon technique for bifurcation lesions.

    PubMed

    Saito, Shigeru; Shishido, Koki; Moriyama, Noriaki; Ochiai, Tomoki; Mizuno, Shingo; Yamanaka, Futoshi; Sugitatsu, Kazuya; Tobita, Kazuki; Matsumi, Junya; Tanaka, Yutaka; Murakami, Masato

    2017-12-04

    We propose a new systematic approach in bifurcation lesions, modified jailed balloon technique (M-JBT), and report the first clinical experience. Side branch occlusion brings with a serious complication and occurs in more than 7.0% of cases during bifurcation stenting. A jailed balloon (JB) is introduced into the side branch (SB), while a stent is placed in the main branch (MB) as crossing SB. The size of the JB is half of the MB stent size. While the proximal end of JB attaching to MB stent, both stent and JB are simultaneously inflated with same pressure. JB is removed and then guidewires are recrossed. Kissing balloon dilatation (KBD) and/or T and protrusion (TAP) stenting are applied as needed. Between February 2015 and February 2016, 233 patients (254 bifurcation lesions including 54 left main trunk disease) underwent percutaneous coronary intervention (PCI) using this technique. Procedure success was achieved in all cases. KBD was performed for 183 lesions and TAP stenting was employed for 31 lesions. Occlusion of SV was not observed in any of the patients. Bench test confirmed less deformity of MB stent in M-JBT compared with conventional-JBT. This is the first report for clinical experiences by using modified jailed balloon technique. This novel M-JBT is safe and effective in the preservation of SB patency during bifurcation stenting. © 2017 Wiley Periodicals, Inc.

  2. Pore dilation reconsidered

    PubMed Central

    Bean, Bruce P

    2015-01-01

    Previous experiments have suggested that many P2X family channels undergo a time-dependent process of pore dilation when activated by ATP. Li et al. now propose a different interpretation of the key experiments. PMID:26505561

  3. Indwelling catheter care

    MedlinePlus

    ... it overnight. You will be shown how to disconnect the bags from the Foley catheter in order ... bags through a separate valve without needing to disconnect the bag from the Foley catheter. Making Sure ...

  4. Unmanned powered balloons

    NASA Technical Reports Server (NTRS)

    Korn, A. O.

    1975-01-01

    In the late 1960's several governmental agencies sponsored efforts to develop unmanned, powered balloon systems for scientific experimentation and military operations. Some of the programs resulted in hardware and limited flight tests; others, to date, have not progressed beyond the paper study stage. Balloon system designs, materials, propulsion units and capabilities are briefly described, and critical problem areas are pointed out which require further study in order to achieve operational powered balloon systems capable of long duration flight at high altitudes.

  5. GHOST balloons around Antarctica

    NASA Technical Reports Server (NTRS)

    Stearns, Charles R.

    1988-01-01

    The GHOST balloon position as a function of time data shows that the atmospheric circulation around the Antarctic Continent at the 100 mb and 200 mb levels is complex. The GHOST balloons supposedly follow the horizontal trajectory of the air at the balloon level. The position of GHOST balloon 98Q for a three month period in 1968 is shown. The balloon moved to within 2 deg of the South Pole on 1 October 1968 and then by 9 December 1968 was 35 deg from the South Pole and close to its position on 1 September 1968. The balloon generally moved from west to east but on two occasions moved in the opposite direction for a few days. The latitude of GHOST balloons 98Q and 149Z which was at 200 mb is given. Both balloons tended to get closer to the South Pole in September and October. Other GHOST balloons at the same pressure and time period may not indicate similar behavior.

  6. Japanese Balloon Program

    NASA Astrophysics Data System (ADS)

    Yoshida, Tetsuya; Fuke, Hideyuki; Shoji, Yasuhiro; Iijima, Issei; Izutsu, Naoki; Kato, Yoichi; Matsuzaka, Yukihiko; Mizuta, Eiichi; Sato, Takatoshi; Tamura, Keisuke; Saito, Yoshitaka; Kakehashi, Yuya

    2012-07-01

    Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency conducts domestic balloon campaigns at Taiki Aerospace Research Field (TARF) in Hokkaido since 2008. The ballooning at TARF becomes stable after four year operation. Because the field faces to the Pacific Ocean, heavy balloons and payloads can be launched safely using a very unique sliding launcher. Recoveries at the inshore along the Tokachi coast can be done very quickly and smoothly. Unfortunately, flight opportunities are recently limited due to unfriendly weather condition. Unstable Jet stream also prevents us to have so-called `boomerang flight' to achieve long flight duration more than several hours. Six balloon-borne experiments were carried out in 2010 and 2011. Three of them were demonstrations of challenges of space engineering, two were in-situ atmospheric observation, and one was the technical flight of new high-resolution γ-ray telescope. In addition to these flights, we carried out two launches for next generation balloons: one for Tawara-shaped superpressure balloon and the other for ultra-thin high-altitude balloon. In this paper, recent activities of the Japanese scientific balloon program will be introduced. On-going development of the balloon system will also be presented.

  7. Optimizing logistics for balloon-occluded retrograde transvenous obliteration (BRTO) of gastric varices by doing away with the indwelling balloon: concept and techniques.

    PubMed

    Saad, Wael E; Nicholson, David B

    2013-06-01

    Since the conception of balloon-occluded retrograde transvenous obliteration (BRTO) of gastric varices 25 years ago, the placement of an indwelling balloon for hours has been central to the BRTO procedure. Numerous variables and variations of the BRTO procedure have been described, including methods to reduce sclerosant, combining percutaneous transhepatic obliteration, varying sclerosant, and using multiple sclerosants within the same procedure. However, the consistent feature of BRTO has always remained the indwelling balloon. Placing an indwelling balloon over hours for the BRTO procedure is a logistical burden that taxes the interventional radiology team and hospital resources. Substituting the balloon with hardware (coils or Amplatzer vascular plugs [AVPs] or both) is technically feasible and its risks most likely correlate with gastrorenal shunt (GRS) size. The current authors use packed 0.018- or 0.035-in coils or both for small gastric variceal systems (GRS size A and B) and AVPs for GRS sizes up to size E (from size A-E). The current authors recommend an indwelling balloon (no hardware substitute) for very large gastric variceal system (GRS size F). Substituting the indwelling balloon for hardware in size F and potentially size E GRS can also be risky. The current article describes the techniques of placing up to 16-mm AVPs through balloon occlusion guide catheters and then deflating the balloon once it has been substituted with the AVPs. In addition, 22-mm AVPs can be placed through sheaths once the balloon occlusion catheters are removed to further augment the 16-mm Amplatzer occlusion. To date, there are no studies describing, let alone evaluating, the clinical feasibility of performing BRTO without indwelling balloons. The described techniques have been successfully performed by the current authors. However, the long-term safety and effectiveness of these techniques is yet to be determined. Copyright © 2013 Elsevier Inc. All rights reserved.

  8. Radioactive 133-Xenon gas-filled balloon to prevent restenosis: dosimetry, efficacy, and safety considerations.

    PubMed

    Apple, Marc; Waksman, Ron; Chan, Rosanna C; Vodovotz, Yoram; Fournadjiev, Jana; Bass, Bill G

    2002-08-06

    Ionizing radiation administered intraluminally via catheter-based systems using solid beta and gamma sources or liquid-filled balloons has shown reduction in the neointima formation after injury in the porcine model. We propose a novel system that uses a 133-Xenon (133Xe) radioactive gas-filled balloon catheter system. Overstretch balloon injury was performed in the coronary arteries of 33 domestic pigs. A novel 133Xe radioactive gas-filled balloon (3.5/45 mm) was positioned to overlap the injured segment with margins. After vacuum was obtained in the balloon catheter, approximately 2.5 cc of 133Xe gas was injected to fill the balloon. Doses of 0, 7.5, 15, and 30 Gy were delivered to a distance of 0.25 mm from the balloon surface. The dwell time ranged from 1.0 to 4.0 minutes, depending on the dose. Localization of 133Xe in the balloon was verified by a gamma camera. The average activity in a 3.5/45-mm balloon was measured at 67.7+/-12.1 mCi, and the total diffusion loss of the injected dose was 0.26% per minute of the injected dose. Bedside radiation exposure measured between 2 and 6 mR/h, and the shallow dose equivalent was calculated as 0.037 mrem per treatment. Histomorphometric analysis at 2 weeks showed inhibition of the intimal area (intimal area corrected for medial fracture length [IA/FL]) in the irradiated segments of 0.26+/-0.08 with 30 Gy, 0.07+/-0.24 with 15 Gy, and 0.12+/-0.89 with 7.5 Gy versus 0.76+/-0.08 with control P<0.001. 133Xe gas-filled balloon is feasible and effective in the reduction of neointima formation in the porcine model and safe for use in coronary arteries.

  9. Efficacy of Intrauterine Bakri Balloon Tamponade in Cesarean Section for Placenta Previa Patients.

    PubMed

    Cho, Hee Young; Park, Yong Won; Kim, Young Han; Jung, Inkyung; Kwon, Ja-Young

    2015-01-01

    The aims of this study were to analyze the predictive factors for the use of intrauterine balloon insertion and to evaluate the efficacy and factors affecting failure of uterine tamponade with a Bakri balloon during cesarean section for abnormal placentation. We reviewed the medical records of 137 patients who underwent elective cesarean section for placenta previa between July 2009 and March 2014. Cesarean section and Bakri balloon insertion were performed by a single qualified surgeon. The Bakri balloon was applied when blood loss during cesarean delivery exceeded 1,000 mL. Sixty-four patients (46.7%) required uterine balloon tamponade during cesarean section due to postpartum bleeding from the lower uterine segment, of whom 50 (78.1%) had placenta previa totalis. The overall success rate was 75% (48/64) for placenta previa patients. Previous cesarean section history, anterior placenta, peripartum platelet count, and disseminated intravascular coagulopathy all significantly differed according to balloon success or failure (all p<0.05). The drainage amount over 1 hour was 500 mL (20-1200 mL) in the balloon failure group and 60 mL (5-500 mL) in the balloon success group (p<0.01). Intrauterine tamponade with a Bakri balloon is an adequate adjunct management for postpartum hemorrhage following cesarean section for placenta previa to preserve the uterus. This method is simple to apply, non-invasive, and inexpensive. However, possible factors related to failure of Bakri balloon tamponade for placenta previa patients such as prior cesarean section history, anterior placentation, thrombocytopenia, presence of DIC at the time of catheter insertion, and catheter drainage volume more than 500 mL within 1 hour of catheter placement should be recognized, and the next-line management should be prepared in advance.

  10. Efficacy of Intrauterine Bakri Balloon Tamponade in Cesarean Section for Placenta Previa Patients

    PubMed Central

    Cho, Hee Young; Park, Yong Won; Kim, Young Han; Jung, Inkyung; Kwon, Ja-Young

    2015-01-01

    Purpose The aims of this study were to analyze the predictive factors for the use of intrauterine balloon insertion and to evaluate the efficacy and factors affecting failure of uterine tamponade with a Bakri balloon during cesarean section for abnormal placentation. Methods We reviewed the medical records of 137 patients who underwent elective cesarean section for placenta previa between July 2009 and March 2014. Cesarean section and Bakri balloon insertion were performed by a single qualified surgeon. The Bakri balloon was applied when blood loss during cesarean delivery exceeded 1,000 mL. Results Sixty-four patients (46.7%) required uterine balloon tamponade during cesarean section due to postpartum bleeding from the lower uterine segment, of whom 50 (78.1%) had placenta previa totalis. The overall success rate was 75% (48/64) for placenta previa patients. Previous cesarean section history, anterior placenta, peripartum platelet count, and disseminated intravascular coagulopathy all significantly differed according to balloon success or failure (all p<0.05). The drainage amount over 1 hour was 500 mL (20–1200 mL) in the balloon failure group and 60 mL (5–500 mL) in the balloon success group (p<0.01). Conclusion Intrauterine tamponade with a Bakri balloon is an adequate adjunct management for postpartum hemorrhage following cesarean section for placenta previa to preserve the uterus. This method is simple to apply, non-invasive, and inexpensive. However, possible factors related to failure of Bakri balloon tamponade for placenta previa patients such as prior cesarean section history, anterior placentation, thrombocytopenia, presence of DIC at the time of catheter insertion, and catheter drainage volume more than 500 mL within 1 hour of catheter placement should be recognized, and the next-line management should be prepared in advance. PMID:26263014

  11. The pulmonary artery catheter: a critical reappraisal.

    PubMed

    Gidwani, Umesh K; Mohanty, Bibhu; Chatterjee, Kanu

    2013-11-01

    Balloon floatation pulmonary artery catheters (PACs) have been used for hemodynamic monitoring in cardiac, medical, and surgical intensive care units since the 1970s. With the availability of newer noninvasive diagnostic modalities, particularly echocardiography, the frequency of diagnostic pulmonary artery catheterization has declined. In this review, the evolution of PACs, the results of nonrandomized and randomized studies in various clinical conditions, the uses and abuses of bedside hemodynamic monitoring, and current indications for pulmonary artery catheterization are discussed. Copyright © 2013 Elsevier Inc. All rights reserved.

  12. The Great Balloon Controversy.

    ERIC Educational Resources Information Center

    Chase, Valerie

    1989-01-01

    Discusses the harmful effects of balloon launches and the dumping of plastic debris into oceans. Cites several examples of plastic materials being discovered inside the bodies of sick and/or dead marine animals. Offers alternative activities to releasing balloons into the atmosphere. (RT)

  13. Modelling Hot Air Balloons.

    ERIC Educational Resources Information Center

    Brimicombe, M. W.

    1991-01-01

    A macroscopic way of modeling hot air balloons using a Newtonian approach is presented. Misleading examples using a car tire and the concept of hot air rising are discussed. Pressure gradient changes in the atmosphere are used to explain how hot air balloons work. (KR)

  14. Endoscope-guided pneumatic dilation for treatment of esophageal achalasia

    PubMed Central

    Chuah, Seng-Kee; Wu, Keng-Liang; Hu, Tsung-Hui; Tai, Wei-Chen; Changchien, Chi-Sin

    2010-01-01

    Pneumatic dilation (PD) is considered to be the first line nonsurgical therapy for achalasia. The principle of the procedure is to weaken the lower esophageal sphincter by tearing its muscle fibers by generating radial force. The endoscope-guided procedure is done without fluoroscopic control. Clinicians usually use a low-compliance balloon such as Rigiflex dilator to perform endoscope-guided PD for the treatment of esophageal achalasia. It has the advantage of determining mucosal injury during the dilation process, so that a repeat endoscopy is not needed to assess the mucosal tearing. Previous studies have shown that endoscope-guided PD is an efficient and safe nonsurgical therapy with results that compare well with other treatment modalities. Although the results may be promising, long-term follow-up is required in the near future. PMID:20101764

  15. Laparoscopic Heller Myotomy for Non-Dilated Esophageal Achalasia in Children with Intraoperative Stepped Dilation Under Image Guidance: Attempting Complete Myotomy.

    PubMed

    Miyano, Go; Miyake, Hiromu; Koyama, Mariko; Morita, Keiichi; Kaneshiro, Masakatsu; Nouso, Hiroshi; Yamoto, Masaya; Fukumoto, Koji; Urushihara, Naoto

    2016-05-01

    This study presents a modified surgical approach to laparoscopic myotomy for achalasia using stepped dilation with a Rigiflex balloon and contrast medium under image guidance. A 10-year-old boy with persistent dysphagia and vomiting had ingested only liquids for 3 months, losing >10 kg in body weight. Barium swallow and esophageal manometry diagnosed esophageal achalasia with mild esophageal dilatation. After failed pneumatic dilatation, laparoscopic Heller myotomy with Dor fundoplication was performed. Prior to surgery, a Rigiflex balloon dilator was placed within the esophagus near the diaphragmatic hiatus. A four-port technique was used, and mobilization of the esophagus was limited to the anterior aspect. A 5-cm Heller myotomy was performed, extending another 2 cm onto the anterior gastric wall. During myotomy, the Rigiflex balloon was serially dilated from 30 to 50 mL, and filled with contrast medium under fluoroscopic image guidance in order to maintain appropriate tension on the esophagus to facilitate myotomy, and to confirm adequate myotomy with sufficient release of lower esophageal sphincter by resecting residual circular muscle fibers. Residual circular muscle fibers can be simultaneously visualized under both fluoroscopic image guidance and direct observation through the laparoscope, and they were cut precisely until the residual notch fully disappeared. Dor fundoplication was completed. The operative time was 180 minutes, and oral intake was started after esophagography on postoperative day 1. As of the 12-month follow-up, the patient has not shown any symptoms, and his postoperative course appeared satisfactory.

  16. Balloon Design Software

    NASA Technical Reports Server (NTRS)

    Farley, Rodger

    2007-01-01

    PlanetaryBalloon Version 5.0 is a software package for the design of meridionally lobed planetary balloons. It operates in a Windows environment, and programming was done in Visual Basic 6. By including the effects of circular lobes with load tapes, skin mass, hoop and meridional stress, and elasticity in the structural elements, a more accurate balloon shape of practical construction can be determined as well as the room-temperature cut pattern for the gore shapes. The computer algorithm is formulated for sizing meridionally lobed balloons for any generalized atmosphere or planet. This also covers zero-pressure, over-pressure, and super-pressure balloons. Low circumferential loads with meridionally reinforced load tapes will produce shapes close to what are known as the "natural shape." The software allows for the design of constant angle, constant radius, or constant hoop stress balloons. It uses the desired payload capacity for given atmospheric conditions and determines the required volume, allowing users to design exactly to their requirements. The formulations are generalized to use any lift gas (or mixture of gases), any atmosphere, or any planet as described by the local acceleration of gravity. PlanetaryBalloon software has a comprehensive user manual that covers features ranging from, but not limited to, buoyancy and super-pressure, convenient design equations, shape formulation, and orthotropic stress/strain.

  17. Complications of retrograde balloon cautery endopyelotomy.

    PubMed

    Schwartz, B F; Stoller, M L

    1999-11-01

    Adult ureteropelvic junction obstruction is increasingly managed with endoscopic techniques. Retrograde balloon cautery endopyelotomy is quick, requires minimal hospital stay and allows most patients a rapid return to work. The complication rate of retrograde balloon cautery endopyelotomy ranges from 13 to 34%, with vascular injury in 0 to 16% of patients. We report 5 uncommon complications, including 4 vascular injuries, that clinicians should be familiar with when using this technique. We reviewed 52 retrograde endoscopic endopyelotomy procedures performed during a 5-year period. There were 5 uncommon complications. Accessory lower pole renal artery injuries occurred in 3 patients, 1 of whom presented 12 days after endopyelotomy. Embolization was successfully performed in all 3 cases and none had subsequent hypertension. In 1 case a right ovarian vein laceration was not evident on preoperative or postoperative angiography. Emergency post-embolization abdominal exploration revealed a 2 mm. injury to the right ovarian vein before entering the right renal vein close to the ureteropelvic junction incision. Nephrectomy and ovarian vein ligature were curative. In 1 case the electrocautery wire broke intracorporeally after firing, resulting in a bobby pin-like configuration. Successful removal was accomplished by twisting the catheter and wrapping the wire around the tip, enabling atraumatic removal. Retrograde balloon cautery endopyelotomy is an emerging technology with potential adverse outcomes. The complications we noted are complex and potentially life threatening. Awareness of these complications may help avoid poor outcomes and expedite appropriate treatment.

  18. Two Tethered Balloon Systems

    NASA Technical Reports Server (NTRS)

    Youngbluth, Otto; Owens, Thomas L.; Storey, Richard W.

    1990-01-01

    Systems take meteorological measurements for variety of research projects. Report describes work done by NASA Langley Research Center in atmospheric research using tethered balloon systems composed of commercially available equipment. Two separate tethered balloon systems described in report have payloads and configurations tailored to requirements of specific projects. Each system capable of measuring atmospheric parameter or species in situ and then telemetering this data in real time to ground station. Meteorological data and concentration of ozone typically measured. Indicates instrumented tethered balloon systems have distinct advantages over other systems for gathering data on troposphere.

  19. Ileal Varices Treated with Balloon-Occluded Retrograde Transvenous Obliteration

    PubMed Central

    Sato, Takahiro; Yamazaki, Katsu; Toyota, Jouji; Karino, Yoshiyasu; Ohmura, Takumi; Akaike, Jun

    2009-01-01

    A 55-year-old man with hepatitis B virus antigen-positive liver cirrhosis was admitted to our hospital with anal bleeding. Colonoscopy revealed blood retention in the entire colon, but no bleeding lesion was found. Computed tomography images showed that vessels in the ileum were connected to the right testicular vein, and we suspected ileal varices to be the most probable cause of bleeding. We immediately performed double balloon enteroscopy, but failed to find any site of bleeding owing to the difficulty of fiberscope insertion with sever adhesion. Using a balloon catheter during retrograde transvenous venography, we found ileal varices communicating with the right testicular vein (efferent vein) with the superior mesenteric vein branch as the afferent vein of these varices. We performed balloon occluded retrograde transvenous obliteration by way of the efferent vein of the varices and have detected no further bleeding in this patient one year after treatment. PMID:27956966

  20. Ileal Varices Treated with Balloon-Occluded Retrograde Transvenous Obliteration.

    PubMed

    Sato, Takahiro; Yamazaki, Katsu; Toyota, Jouji; Karino, Yoshiyasu; Ohmura, Takumi; Akaike, Jun

    2009-04-01

    A 55-year-old man with hepatitis B virus antigen-positive liver cirrhosis was admitted to our hospital with anal bleeding. Colonoscopy revealed blood retention in the entire colon, but no bleeding lesion was found. Computed tomography images showed that vessels in the ileum were connected to the right testicular vein, and we suspected ileal varices to be the most probable cause of bleeding. We immediately performed double balloon enteroscopy, but failed to find any site of bleeding owing to the difficulty of fiberscope insertion with sever adhesion. Using a balloon catheter during retrograde transvenous venography, we found ileal varices communicating with the right testicular vein (efferent vein) with the superior mesenteric vein branch as the afferent vein of these varices. We performed balloon occluded retrograde transvenous obliteration by way of the efferent vein of the varices and have detected no further bleeding in this patient one year after treatment.

  1. Peritoneal Dialysis Catheter Insertion.

    PubMed

    Crabtree, John H; Chow, Kai-Ming

    2017-01-01

    The success of peritoneal dialysis as renal-replacement therapy depends on a well-functioning peritoneal catheter. Knowledge of best practices in catheter insertion can minimize the risk of catheter complications that lead to peritoneal dialysis failure. The catheter placement procedure begins with preoperative assessment of the patient to determine the most appropriate catheter type, insertion site, and exit site location. Preoperative preparation of the patient is an instrumental step in facilitating the performance of the procedure, avoiding untoward events, and promoting the desired outcome. Catheter insertion methods include percutaneous needle-guidewire with or without image guidance, open surgical dissection, peritoneoscopic procedure, and surgical laparoscopy. The insertion technique used often depends on the geographic availability of material resources and local provider expertise in placing catheters. Independent of the catheter implantation approach, adherence to a number of universal details is required to ensure the best opportunity for creating a successful long-term peritoneal access. Finally, appropriate postoperative care and catheter break-in enables a smooth transition to dialysis therapy. Copyright © 2017 Elsevier Inc. All rights reserved.

  2. The Descending Helium Balloon

    ERIC Educational Resources Information Center

    Helseth, Lars Egil

    2014-01-01

    I describe a simple and fascinating experiment wherein helium leaks out of a rubber balloon, thereby causing it to descend. An estimate of the volumetric leakage rate is made by measuring its rate of descent.

  3. Ballooning Interest in Science.

    ERIC Educational Resources Information Center

    Kim, Hy

    1992-01-01

    Presents an activity in which students construct model hot air balloons to introduce the concepts of convection current, the principles of Charles' gas law, and three-dimensional geometric shapes. Provides construction and launching instructions. (MDH)

  4. Modelling hot air balloons

    NASA Astrophysics Data System (ADS)

    Brimicombe, N. W.

    1991-07-01

    Hot air balloons can be modelled in a number of different ways. The most satisfactory, but least useful model is at a microscopic level. Macroscopic models are easier to use but can be very misleading.

  5. Transarterial Balloon-assisted Onyx Embolization of Intracranial Arteriovenous Malformations Using a Dual-lumen Balloon Microcatheter: Two Case Reports.

    PubMed

    Kim, Sang Heum; Kim, Tae Gon; Kong, Min Ho

    2017-09-01

    The Onyx system has been well established in recent years as a very important material in the treatment of arteriovenous malformations (AVMs). When using the Onyx, it is essential to wait for the creation of a plug around the tip of the catheter, which enables the effective forward penetration of Onyx. Recent reports have shown that the introduction of a dimethyl sulfoxide compatible dual-lumen balloon microcatheter improves the efficiency of AVM embolization. We report our recent experience of two cases of intracranial AVM embolization using Onyx and the transarterial balloon-assisted technique. In both cases, the procedures were successfully performed and the nidus of the AVM was totally occluded in a relatively short time. This technique may enable immediate forward flow and penetration of Onyx without concern about reflux. It may also reduce the procedure time and increase the angiographic occlusion rate. Navigation of the dual-lumen balloon microcatheter nevertheless remains a challenge.

  6. Transarterial Balloon-assisted Onyx Embolization of Intracranial Arteriovenous Malformations Using a Dual-lumen Balloon Microcatheter: Two Case Reports

    PubMed Central

    Kim, Sang Heum; Kong, Min Ho

    2017-01-01

    The Onyx system has been well established in recent years as a very important material in the treatment of arteriovenous malformations (AVMs). When using the Onyx, it is essential to wait for the creation of a plug around the tip of the catheter, which enables the effective forward penetration of Onyx. Recent reports have shown that the introduction of a dimethyl sulfoxide compatible dual-lumen balloon microcatheter improves the efficiency of AVM embolization. We report our recent experience of two cases of intracranial AVM embolization using Onyx and the transarterial balloon-assisted technique. In both cases, the procedures were successfully performed and the nidus of the AVM was totally occluded in a relatively short time. This technique may enable immediate forward flow and penetration of Onyx without concern about reflux. It may also reduce the procedure time and increase the angiographic occlusion rate. Navigation of the dual-lumen balloon microcatheter nevertheless remains a challenge. PMID:29159158

  7. Balloon Borne Ultraviolet Spectrometer.

    DTIC Science & Technology

    1978-12-28

    n.c.aaary ond lden lfy by block numb.r) ultraviolet ground support equipment (GSE) spectrometers flight electronics instrumentation balloons \\ solar ...Assembly 4 Fig. 3 Solar Balloon Experiment Ass ’y 7 Fig. 4 Mechanical Interface , UV Spectrometer 8 Fig . 5 Spectrometer Body Assemb ly 10 Fig. 6...Diagram, GSE )bnitor 48 Selector and Battery Charger Fig. 25 Schematic Diagram, GSE Serial to 49 Parallel Data Converter Fig. 26 Schematic Diagram

  8. Determination of balloon drag

    NASA Technical Reports Server (NTRS)

    Conrad, George R.; Robbins, Edward J.

    1991-01-01

    The evolution of an empirical drag relationship that has stimulated rethinking regarding the physics of balloon drag phenomena is discussed. Combined parasitic drag from all sources in the balloon system are estimated to constitute less than 10 percent of the total system drag. It is shown that the difference between flight-determined drag coefficients and those based on the spherical assumption should be related to the square of the Froude number.

  9. Immediate stent recoil in an anastomotic vein graft lesion treated by cutting balloon angioplasty.

    PubMed

    Akkus, Nuri Ilker; Budeepalli, Jagan; Cilingiroglu, Mehmet

    2013-11-01

    Saphenous vein graft (SVG) anastomotic lesions can have significant fibromuscular hyperplasia and may be resistant to balloon angioplasty alone. Stents have been used successfully to treat these lesions. There are no reports of immediate stent recoil following such treatment in the literature. We describe immediate and persistent stent recoil in an anastomotic SVG lesion even after initial and post-deployment complete balloon dilatation of the stent and its successful treatment by cutting balloon angioplasty. Copyright © 2013 Sociedade Portuguesa de Cardiologia. Published by Elsevier España. All rights reserved.

  10. High definition urethral pressure profilometry: Evaluating a novel microtip catheter.

    PubMed

    Klünder, Mario; Amend, Bastian; Vaegler, Martin; Kelp, Alexandra; Feuer, Ronny; Sievert, Karl-Dietrich; Stenzl, Arnulf; Sawodny, Oliver; Ederer, Michael

    2016-11-01

    Urethral pressure profilometry (UPP) is used in the diagnosis of stress urinary incontinence (SUI). SUI is a significant medical, social, and economic problem, affecting about 12.5% of the population. A novel microtip catheter was developed for UPP featuring an inclination sensor and higher angular resolution compared to systems in clinical use today. Therewith, the location of each measured pressure sample can be determined and the spatial pressure distribution inside the urethra reconstructed. In order to assess the performance and plausibility of data from the microtip catheter, we compare it to data from a double balloon air charged system. Both catheters are used on sedated female minipigs. Data from the microtip catheter are processed through a signal reconstruction algorithm, plotted and compared against data from the air-charged catheter. The microtip catheter delivers results in agreement with previous comparisons of microtip and air-charged systems. It additionally provides a new level of detail in the reconstructed UPPs which may lead to new insights into the sphincter mechanism of minipigs. The ability of air-charged catheters to measure pressure circumferentially is widely considered a main advantage over microtip catheters. However, directional pressure readings can provide additional information on angular fluctuations in the urethral pressure distribution. It is shown that the novel microtip catheter in combination with a signal reconstruction algorithm delivers plausible data. It offers the opportunity to evaluate urethral structures, especially the sphincter, in context of the correct location within the anatomical location of the pelvic floor. Neurourol. Urodynam. 35:888-894, 2016. © 2015 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc.

  11. Dilation and Curettage (D&C)

    MedlinePlus

    ... For Patients About ACOG Dilation and Curettage (D&C) Home For Patients Search FAQs Dilation and Curettage ( ... February 2016 PDF Format Dilation and Curettage (D&C) Special Procedures What is dilation and curettage (D& ...

  12. Clinical outcomes of enteroscopy using the double-balloon method for strictures of the small intestine

    PubMed Central

    Sunada, Keijiro; Yamamoto, Hironori; Kita, Hiroto; Yano, Tomonori; Sato, Hiroyuki; Hayashi, Yoshikazu; Miyata, Tomohiko; Sekine, Yutaka; Kuno, Akiko; Iwamoto, Michiko; Ohnishi, Hirohide; Ido, Kenichi; Sugano, Kentaro

    2005-01-01

    AIM: To evaluate the clinical outcome of enteroscopy, using the double-balloon method, focusing on the involvement of neoplasms in strictures of the small intestine. METHODS: Enteroscopy, using the double-balloon method, was performed between December 1999 and December 2002 at Jichi Medical School Hospital, Japan and strictures of the small intestine were found in 17 out of 62 patients. These 17 consecutive patients were subjected to analysis. RESULTS: The double-balloon enteroscopy contributed to the diagnosis of small intestinal neoplasms found in 3 out of 17 patients by direct observation of the strictures as well as biopsy sampling. Surgical procedures were chosen for these three patients, while balloon dilation was chosen for the strictures in four patients diagnosed with inflammation without involvement of neoplasm. CONCLUSION: Double-balloon enteroscopy is a useful method for the diagnosis and treatment of strictures in the small bowel. PMID:15742422

  13. Usefulness of cutting balloon angioplasty for the treatment of congenital heart defects.

    PubMed

    Kusa, Jacek; Mazurak, Magdalena; Skierska, Agnieszka; Szydlowski, Leslaw; Czesniewicz, Pawel; Manka, Lukasz

    2018-01-01

    Patients with complex congenital heart defects may have different hemodynamic prob-lems which require a variety of interventional procedures including angioplasty which involves using high-pressure balloons. After failure of conventional balloon angioplasty, cutting balloon angioplasty is the next treatment option available. The purpose of this study was to evaluate the safety and efficacy of cutting balloon angioplasty in children with different types of congenital heart defects. Cutting balloon angioplasty was performed in 28 children with different congenital heart defects. The indication for cutting balloon angioplasty was: pulmonary artery stenosis in 17 patients, creating or dilatation of interatrial communication in 10 patients, and stenosis of left subclavian artery in 1 patient. In the pulmonary arteries group there was a significant decrease in systolic blood pressure (SBP) in the proximal part of the artery from the average 74.33 ± 20.4 mm Hg to 55 ± 16.7 mm Hg (p < 0.001). Distal to the stenosis there was an increase in SBP from 19.8 ± 3.82 mm Hg to 30.3 ± ± 13.3 mm Hg (p = 0.04). This result remained constant in the follow-up. In atrial septal defect/fenestra-tion group, cutting balloon angioplasty was performed after an unsuccessful classic Rashkind procedure. After cutting balloon angioplasty there was a significant widening of the interatrial communication. Cutting balloon angioplasty is a feasible and effective treatment option in different con-genital heart defects.

  14. Factors confounding impedance catheter volume measurements in vitro.

    PubMed

    Bielefeld, M R; Cabreriza, S E; Spotnitz, H M

    1993-06-01

    The impedance catheter allows continuous measurement of ventricular volume. External influences have been described as causing parallel shifts in impedance-measured volumes; however, factors affecting impedance measurements in a nonparallel manner have not been fully characterized. Accordingly, an impedance catheter was placed inside a latex balloon into which known volumes of normal saline solution were injected. Conductive and nonconductive materials were individually placed within the balloon. Impedance was measured with materials touching (T) or not touching (NT) the catheter. Impedance-measured volumes were plotted versus actual volumes. Compared with the line of identity (LID), a statistical difference (p < 0.05) was found in the slopes in the presence of metallic objects only. These included a pacing lead (T, NT) (mT = 1.32m mNT = 1.29 versus mLID = 1.00), titanium (T) (mT = 1.68 versus mLID = 1.00), and aluminum (NT) (mNT = 0.72 versus mLID = 1.00). These changes in slope indicate nonparallel effects on impedance that confound the ability of the impedance catheter to determine volumes in vitro. These observations imply that serial calibration of both the slope constant (alpha) and the intercept (parallel conductance) of impedance may be necessary for in vivo measurements of ventricular volume based on impedance in the presence of metallic objects.

  15. Navigation for fluoroscopy-guided cryo-balloon ablation procedures of atrial fibrillation

    NASA Astrophysics Data System (ADS)

    Bourier, Felix; Brost, Alexander; Kleinoeder, Andreas; Kurzendorfer, Tanja; Koch, Martin; Kiraly, Attila; Schneider, Hans-Juergen; Hornegger, Joachim; Strobel, Norbert; Kurzidim, Klaus

    2012-02-01

    Atrial fibrillation (AFib), the most common arrhythmia, has been identified as a major cause of stroke. The current standard in interventional treatment of AFib is the pulmonary vein isolation (PVI). PVI is guided by fluoroscopy or non-fluoroscopic electro-anatomic mapping systems (EAMS). Either classic point-to-point radio-frequency (RF)- catheter ablation or so-called single-shot-devices like cryo-balloons are used to achieve electrically isolation of the pulmonary veins and the left atrium (LA). Fluoroscopy-based systems render overlay images from pre-operative 3-D data sets which are then merged with fluoroscopic imaging, thereby adding detailed 3-D information to conventional fluoroscopy. EAMS provide tracking and visualization of RF catheters by means of electro-magnetic tracking. Unfortunately, current navigation systems, fluoroscopy-based or EAMS, do not provide tools to localize and visualize single shot devices like cryo-balloon catheters in 3-D. We present a prototype software for fluoroscopy-guided ablation procedures that is capable of superimposing 3-D datasets as well as reconstructing cyro-balloon catheters in 3-D. The 3-D cyro-balloon reconstruction was evaluated on 9 clinical data sets, yielded a reprojected 2-D error of 1.72 mm +/- 1.02 mm.

  16. Intermittent self-dilatation for urethral stricture disease in males.

    PubMed

    Jackson, Matthew J; Veeratterapillay, Rajan; Harding, Chris K; Dorkin, Trevor J

    2014-12-19

    trials compared one device for performing intermittent self-dilatation with another. Results from one trial at a high risk of bias were too uncertain to determine the effects of a low friction hydrophilic catheter and a standard polyvinyl chloride catheter on the risk of recurrent urethral stricture (RR 0.32, 95% CI 0.07 to 1.40). Similarly one study did not find evidence of a difference between one percent triamcinolone gel for lubricating the intermittent self-dilatation catheter versus water-based gel on risk of recurrent urethral stricture (RR 0.68, 95% CI 0.35 to 1.32). Two trials reported adverse events, but one did not provide sufficient detail for analysis. The other small study reported fewer instances of prostatitis, urethral bleeding or bacteriuria with a low friction hydrophilic catheter compared with a standard polyvinyl chloride catheter (RR 0.13, 95% CI 0.02 to 0.98). 'Happiness with the intervention' was assessed using a non-validated scale in one study, but no trials formally assessed patient-reported health-related quality of life or acceptability. No trials reported on patient-reported lower urinary tract symptoms or cost-effectiveness. GRADE quality assessment The evidence that intermittent self-dilatation reduces the risk of recurrent urethral stricture after surgical intervention was downgraded to 'very low' on the basis that the studies comprising the meta-analysis were deemed to have high risk of bias, and the data was imprecise and inconsistent. Insufficient evidence No trials provided cost-effectiveness data or used a validated patient-reported outcome measure, and adverse events were not reported rigorously. Acceptability of the intervention to patients has not been assessed quantitatively or qualitatively. Performing intermittent self-dilatation may confer a reduced risk of recurrent urethral stricture after endoscopic treatment. We have very little confidence in the estimate of the effect owing to the very low quality of the evidence

  17. Recanalization of Acute and Subacute Femoropopliteal Artery Occlusions with the Rotarex Catheter: One Year Follow-up, Single Center Experience

    SciTech Connect

    Duc, Sylvain R., E-mail: Sylvain.duc@balgrist.ch; Schoch, Eric; Pfyffer, Markus

    2005-06-15

    Purpose:To assess the efficacy and safety of a new rotational catheter for percutaneous removal of fresh and organized thrombi in the femoropopliteal artery.Methods:Forty-one limbs in 38 patients (age 56-90 years, mean 75.6 years) with acute, subacute or chronic femoropopliteal occlusions of 1-180 days' duration (mean 31.6 days) were treated with the Rotarex device. The Fontaine stage was mainly IIB (Rutherford 2-3, 22 patients) or III (Rutherford 4, 14 patients). The length of occlusion varied from 2 to 35 cm (mean 13.1 cm). After recanalization percutaneous transluminal angioplasty (PTA) was performed if there was a residual stenosis of >25%. Patients weremore » followed up with color Doppler ultrasound at 48 hr and clinically with Doppler pressures and oscillometry at 3, 6, and 12 months.Results:After an average of two passages with the Rotarex catheter all but two limbs required PTA for residual stenosis >25%. Five patients needed additional stenting. Major complications were one groin hematoma requiring blood transfusion and one arteriovenous fistula spontaneously thrombosing after unsuccessful primary prolonged balloon dilation. Distal embolizations occurred in 10 patients; 6 clinically relevant emboli were aspirated. All occlusions were technically successfully recanalised there were 2 early reocclusions after 1 day and two at 2 weeks. Brachial-ankle indices improved from an average of 0.41 before to 0.93 after recanalization. Primary and secondary patency rates were 62% / 84% after 6 months and 39% / 68% after 1 year. The amputation-free survival at 12 months was 100%.Conclusion:The Rotarex mechanical thrombectomy device is an efficient, quick, easy to handle, and safe tool for the treatment of acute, subacute or even chronic peripheral arterial thromboembolic occlusions. It can be used for short or long occlusions with equal success, provided the obstruction is not heavily calcified and has been safely passed with a guidewire first.« less

  18. Universal stratospheric balloon gradiometer

    NASA Astrophysics Data System (ADS)

    Tsvetkov, Yury; Filippov, Sergey; Brekhov, Oleg; Nikolaev, Nikolay

    The study of the interior structure of the Earth and laws of its evolution is one of the most difficult problems of natural science. Among the geophysical fields the anomaly magnetic field is one of the most informational in questions of the Earth’s crust structure. Many important parameters of an environment are expedient for measuring at lower altitudes, than satellite ones. So, one of the alternatives is stratospheric balloon survey. The balloon flight altitudes cover the range from 20 to 50 km. At such altitudes there are steady zone air flows due to which the balloon flight trajectories can be of any direction, including round-the-world (round-the-pole). For investigation of Earth's magnetic field one of the examples of such sounding system have been designed, developed and maintained at IZMIRAN and MAI during already about 25 years. This system consists of three instrumental containers uniformly placed along a vertical 6 km line. Up today this set has been used only for geomagnetic purposes. So we describe this system on example of the measuring of the geomagnetic field gradient. System allows measuring a module and vertical gradient of the geomagnetic field along the whole flight trajectory and so one’s name is - stratospheric balloon magnetic gradiometer (SMBG). The GPS-receivers, located in each instrumental container, fix the flight coordinates to within several tens meters. Process of SBMG deployment, feature of the exit of rope from the magazine at the moment of balloon launching has been studied. Used magazine is cellular type. The hodograph of the measuring base of SBMG and the technique of correction of the deviations of the measuring base from the vertical line (introduction of the amendments for the deviation) during the flight have been investigated. It is shown that estimation of the normal level of values of the vertical gradient of the geomagnetic field is determined by the accuracy of determining the length of the measuring base SBMG

  19. Gradient magnetometer system balloons

    NASA Astrophysics Data System (ADS)

    Korepanov, Valery; Tsvetkov, Yury

    2005-08-01

    Earth's magnetic field study still remains one of the leading edges of experimental geophysics. Thus study is executed on the Earth surface, including ocean bottom, and on satellite heights using component, mostly flux-gate magnetometers. But balloon experiments with component magnetometers are very seldom, first of all because of great complexity of data interpretation. This niche still waits for new experimental ideology, which will allow to get the measurements results with high accuracy, especially in gradient mode. The great importance of precise balloon-borne component magnetic field gradient study is obvious. Its technical realization is based both on the available at the marked high-precision non-magnetic tiltmeters and on recent achievements of flux-gate magnetometry. The scientific goals of balloon-borne magnetic gradiometric experiment are discussed and its practical realization is proposed.

  20. Endoscopic electrocautery dilation of benign anastomotic colonic strictures: a single-center experience.

    PubMed

    Bravi, Ivana; Ravizza, Davide; Fiori, Giancarla; Tamayo, Darina; Trovato, Cristina; De Roberto, Giuseppe; Genco, Chiara; Crosta, Cristiano

    2016-01-01

    Benign anastomotic colonic stenosis sometimes occur after surgery and usually require surgical or endoscopic dilation. Endoscopic dilation of anastomotic colonic strictures by using balloon or bougie-type dilators has been demonstrated to be safe and effective in multiple uncontrolled series. However, few data are available on safety and efficacy of endoscopic electrocautery dilation. The aim of our study was to retrospectively investigate safety and efficacy of endoscopic electrocautery dilation of postsurgical benign anastomotic colonic strictures. Sixty patients (37 women; median age 63.6 years, range 22.6-81.7) with benign anastomotic colonic or rectal strictures treated with endoscopic electrocautery dilation between June 2001 and February 2013 were included in the study. Anastomotic stricture was defined as a narrowed anastomosis through which a standard colonoscope could not be passed. Only annular anastomotic strictures were considered suitable for electrocautery dilation which consisted of radial incisions performed with a precut sphincterotome. Treatment was considered successful if the colonic anastomosis could be passed by a standard colonoscope immediately after dilation. Recurrence was defined as anastomotic stricture reappearance during follow-up. The time interval between colorectal surgery and the first endoscopic evaluation or symptoms development was 7.3 months (1.3-60.7). Electrocautery dilation was successful in all the patients. There were no procedure-related complications. Median follow-up was 35.5 months (2.0-144.0). Anastomotic stricture recurrence was observed in three patients who were successfully treated with electrocautery dilation and Savary dilation. Endoscopic electrocautery dilation is a safe and effective treatment for annular benign anastomotic postsurgical colonic strictures.

  1. Launching Garbage-Bag Balloons.

    ERIC Educational Resources Information Center

    Kim, Hy

    1997-01-01

    Presents a modification of a procedure for making and launching hot air balloons made out of garbage bags. Student instructions for balloon construction, launching instructions, and scale diagrams are included. (DDR)

  2. Percutaneous focused force aortic valvuloplasty using the buddy-catheter technique.

    PubMed

    Tada, Norio; Ootomo, Tatsushi; Meguro, Taiichiro

    2012-06-01

    Percutaneous transcatheter aortic valvuloplasty is seriously limited by high restenosis rates. We report a case where the use of a buddy-catheter technique during balloon inflation allowed increased focused force onto calcified stiff commissures with an increase in resultant valve area. This technique may result in further valve area enlargement and decrease the restenosis rate.

  3. Suprapubic catheter care

    MedlinePlus

    ... going back into your bladder. Try not to disconnect the catheter more than you need to. Keeping ... Copyright Privacy Accessibility Quality Guidelines Viewers & Players MedlinePlus Connect for EHRs For Developers U.S. National Library of ...

  4. Pilot, a balloon borne experiment underground tests

    NASA Astrophysics Data System (ADS)

    Engel, C.; Marty, C.; Mot, B.; Bernard, J.-Ph.; Ristorcelli, I.; Otrio, G.; Leriche, B.; Longval, Y.; Pajot, F.; Roudil, G.; Caillat, A.; Dubois, J. P.; Bouzit, M.; Buttice, V.; Camus, T.

    2017-11-01

    PILOT is a balloon borne experiment, which will measure the polarized emission of dust grains, in the interstellar medium, in the sub millimeter range (with two photometric channels centered at 240 and 550 μm). The primary and secondary mirror must be positioned with accuracies better than 0.6 mm and 0.06°. These tolerances include environmental conditions (mainly gravity and thermo-elastic effects), uncertainties on alignments, and uncertainties on the dilatation coefficient. In order to respect these tolerances, we need precise characterization of each optical component. The characterization of the primary mirror and the integrated instrument is performed using a dedicated submillimeter test bench. A brief description of the scientific objectives and instrumental concept is given in the first part. We present, in the second and in the third part, the status of these ground tests, first results and planned tests.

  5. Guide Catheter Extension Device Is Effective in Renal Angioplasty for Severely Calcified Lesions

    PubMed Central

    Sugimoto, Takeshi; Nomura, Tetsuya; Hori, Yusuke; Yoshioka, Kenichi; Kubota, Hiroshi; Miyawaki, Daisuke; Urata, Ryota; Kikai, Masakazu; Keira, Natsuya; Tatsumi, Tetsuya

    2017-01-01

    Patient: Male, 69 Final Diagnosis: Atherosclerotic renal artery stenosis Symptoms: None Medication: — Clinical Procedure: — Specialty: Radiology Objective: Unusual setting of medical care Background: The GuideLiner catheter extension device is a monorail-type “Child” support catheter that facilitates coaxial alignment with the guide catheter and provides an appropriate back-up force. This device has been developed in the field of coronary intervention, and now is becoming widely applied in the field of endovascular treatment. However, there has been no report on the effectiveness of the guide catheter extension device in percutaneous transluminal renal angioplasty (PTRA). Case Report: We encountered a case of atherosclerotic subtotal occlusion at the ostium of the left renal artery. Due to the severely calcified orifice and weaker back-up force provided by a JR4 guide catheter, we could not pass any guide-wires through the target lesion. Therefore, we introduced a guide catheter extension device, the GuideLiner catheter, through the guide catheter and achieved good guidewire maneuverability. We finally deployed 2 balloon-expandable stents and successfully performed all PTRA procedures. Conclusions: The guide catheter extension device can be effective in PTRA for severely calcified subtotal occlusion. PMID:28533503

  6. Guide Catheter Extension Device Is Effective in Renal Angioplasty for Severely Calcified Lesions.

    PubMed

    Sugimoto, Takeshi; Nomura, Tetsuya; Hori, Yusuke; Yoshioka, Kenichi; Kubota, Hiroshi; Miyawaki, Daisuke; Urata, Ryota; Kikai, Masakazu; Keira, Natsuya; Tatsumi, Tetsuya

    2017-05-23

    BACKGROUND The GuideLiner catheter extension device is a monorail-type "Child" support catheter that facilitates coaxial alignment with the guide catheter and provides an appropriate back-up force. This device has been developed in the field of coronary intervention, and now is becoming widely applied in the field of endovascular treatment. However, there has been no report on the effectiveness of the guide catheter extension device in percutaneous transluminal renal angioplasty (PTRA). CASE REPORT We encountered a case of atherosclerotic subtotal occlusion at the ostium of the left renal artery. Due to the severely calcified orifice and weaker back-up force provided by a JR4 guide catheter, we could not pass any guidewires through the target lesion. Therefore, we introduced a guide catheter extension device, the GuideLiner catheter, through the guide catheter and achieved good guidewire maneuverability. We finally deployed 2 balloon-expandable stents and successfully performed all PTRA procedures. CONCLUSIONS The guide catheter extension device can be effective in PTRA for severely calcified subtotal occlusion.

  7. [Urinary catheter biofilm infections].

    PubMed

    Holá, V; Růzicka, F

    2008-04-01

    Urinary tract infections, most of which are biofilm infections in catheterized patients, account for more than 40% of hospital infections. Bacterial colonization of the urinary tract and catheters causes not only infection but also other complications such as catheter blockage by bacterial encrustation, urolithiasis and pyelonephritis. About 50% of long-term catheterized patients face urinary flow obstruction due to catheter encrustation, but no measure is currently available to prevent it. Encrustation has been known either to result from metabolic dysfunction or to be of microbial origin, with urease positive bacterial species implicated most often. Infectious calculi account for about 15-20% of all cases of urolithiasis and are often associated with biofilm colonization of a long-term indwelling urinary catheter or urethral stent. The use of closed catheter systems is helpful in reducing such problems; nevertheless, such a system only delays the inevitable, with infections emerging a little later. Various coatings intended to prevent the bacterial adhesion to the surface of catheters and implants and thus also the emergence of biofilm infections, unfortunately, do not inhibit the microbial adhesion completely and permanently and the only reliable method for biofilm eradication remains the removal of the foreign body from the patient.

  8. Scientific balloons: historical remarks.

    NASA Astrophysics Data System (ADS)

    Ubertini, P.

    The paper is an overview of the Human attempt to fly, from the myth of Daedalus and his son Icarus to the first "aerostatic" experiment by Joseph-Michel and Jaques-Etienne Montgolfier. Then, via a jump of about 200 years, we arrive to the era of the modern stratospheric ballooning that, from the beginning of the last century, have provided a unique flight opportunity for aerospace experiments. In particular, the Italian scientific community has employed stratospheric balloons since the '50s for cosmic rays and high energy astrophysical experiments with initial launches performed from Cagliari Helmas Airport (Sardinia). More recently an almost ideal location was found in the area of Trapani-Milo (Sicily, Italy), were an old abandoned airport was refurbished to be used as a new launch site that became operative at the beginning of the '70s. Finally, we suggest a short reminiscence of the first transatlantic experiment carried out on August 1975 in collaboration between SAS-CNR (Italy) and NSBF-NASA (USA). The reason why the Long Duration Balloon has been recently re-oriented in a different direction is analysed and future perspectives discussed. Finally, the spirit of the balloon launch performed by the Groups lead by Edoardo Amaldi, Livio Scarsi and other Italian pioneers, with payloads looking like "refrigerators" weighting a few tens of kg is intact and the wide participation to the present Workshop is the clear demonstration.

  9. UK guidelines on oesophageal dilatation in clinical practice

    PubMed Central

    Sami, Sarmed S; Haboubi, Hasan N; Ang, Yeng; Boger, Philip; Bhandari, Pradeep; de Caestecker, John; Griffiths, Helen; Haidry, Rehan; Patel, Praful; Paterson, Stuart; Ragunath, Krish; Watson, Peter; Siersema, Peter D; Attwood, Stephen E

    2018-01-01

    These are updated guidelines which supersede the original version published in 2004. This work has been endorsed by the Clinical Services and Standards Committee of the British Society of Gastroenterology (BSG) under the auspices of the oesophageal section of the BSG. The original guidelines have undergone extensive revision by the 16 members of the Guideline Development Group with representation from individuals across all relevant disciplines, including the Heartburn Cancer UK charity, a nursing representative and a patient representative. The methodological rigour and transparency of the guideline development processes were appraised using the revised Appraisal of Guidelines for Research and Evaluation (AGREE II) tool. Dilatation of the oesophagus is a relatively high-risk intervention, and is required by an increasing range of disease states. Moreover, there is scarcity of evidence in the literature to guide clinicians on how to safely perform this procedure. These guidelines deal specifically with the dilatation procedure using balloon or bougie devices as a primary treatment strategy for non-malignant narrowing of the oesophagus. The use of stents is outside the remit of this paper; however, for cases of dilatation failure, alternative techniques—including stents—will be listed. The guideline is divided into the following subheadings: (1) patient preparation; (2) the dilatation procedure; (3) aftercare and (4) disease-specific considerations. A systematic literature search was performed. The Grading of Recommendations Assessment, Develop­ment and Evaluation (GRADE) tool was used to evaluate the quality of evidence and decide on the strength of recommendations made. PMID:29478034

  10. Flow Past a Descending Balloon

    NASA Technical Reports Server (NTRS)

    Baginski, Frank

    2001-01-01

    In this report, we present our findings related to aerodynamic loading of partially inflated balloon shapes. This report will consider aerodynamic loading of partially inflated inextensible natural shape balloons and some relevant problems in potential flow. For the axisymmetric modeling, we modified our Balloon Design Shape Program (BDSP) to handle axisymmetric inextensible ascent shapes with aerodynamic loading. For a few simple examples of two dimensional potential flows, we used the Matlab PDE Toolbox. In addition, we propose a model for aerodynamic loading of strained energy minimizing balloon shapes with lobes. Numerical solutions are presented for partially inflated strained balloon shapes with lobes and no aerodynamic loading.

  11. Placenta accreta and balloon catheterization: the experience of a single center and an update of latest evidence of literature.

    PubMed

    Gulino, Ferdinando Antonio; Guardo, F Di; Zambrotta, E; Di Gregorio, L M; Miranda, Andrea; Capriglione, Stella; Palumbo, M A

    2018-05-18

    We studied the efficacy of using pre-cesarean delivery (CD) temporary occlusion of internal iliac arteries with balloon catheters in case of placenta previa-accreta in terms of maternal and neonatal outcomes and to test accuracy of ultrasound (US) and magnetic resonance imaging (MRI) for prenatal diagnosis. From March 2014 to January 2018, women with an US and/or MRI diagnosis of placenta previa-accreta and a planned delivery were enrolled and divided into two groups: balloon catheterization group (women treated with preoperative catheters and CD) and control group (women candidates to elective CD). 37 patients were enrolled: 16 in balloon catheterization group and 21 in control group. Significant differences were detected in estimated blood loss. Prophylactic balloon catheterization could reduce intraoperative red blood cell transfusion. The incidence of hysterectomy was lower in balloon group. No statistical difference was found for neonatal outcomes. Both US and MRI have showed to be useful and complementary to diagnose placenta previa-accreta. Temporal, perioperative, and prophylactic positioning of balloon vascular catheters is an effective method for managing severe hemorrhage caused by placenta previa-accreta as it reduced intraoperative blood loss, lessened perioperative hemostatic measures and intraoperative red cell transfusions, and reduced hysterectomies.

  12. Epicardial phrenic nerve displacement during catheter ablation of atrial and ventricular arrhythmias: procedural experience and outcomes.

    PubMed

    Kumar, Saurabh; Barbhaiya, Chirag R; Baldinger, Samuel H; Koplan, Bruce A; Maytin, Melanie; Epstein, Laurence M; John, Roy M; Michaud, Gregory F; Tedrow, Usha B; Stevenson, William G

    2015-08-01

    Arrhythmia origin in close proximity to the phrenic nerve (PN) can hinder successful catheter ablation. We describe our approach with epicardial PN displacement in such instances. PN displacement via percutaneous pericardial access was attempted in 13 patients (age 49±16 years, 9 females) with either atrial tachycardia (6 patients) or atrial fibrillation triggered from a superior vena cava focus (1 patient) adjacent to the right PN or epicardial ventricular tachycardia origin adjacent to the left PN (6 patients). An epicardially placed steerable sheath/4 mm-catheter combination (5 patients) or a vascular or an esophageal balloon (8 patients) was ultimately successful. Balloon placement was often difficult requiring manipulation via a steerable sheath. In 2 ventricular tachycardia cases, absence of PN capture was achieved only once the balloon was directly over the ablation catheter. In 3 atrial tachycardia patients, PN displacement was not possible with a balloon; however, a steerable sheath/catheter combination was ultimately successful. PN displacement allowed acute abolishment of all targeted arrhythmias. No PN injury occurred acutely or in follow up. Two patients developed acute complications (pleuro-pericardial fistula 1 and pericardial bleeding 1). Survival free of target arrhythmia was achieved in all atrial tachycardia patients; however, a nontargeted ventricular tachycardia recurred in 1 patient at a median of 13 months' follow up. Arrhythmias originating in close proximity to the PN can be targeted successfully with PN displacement with an epicardially placed steerable sheath/catheter combination, or balloon, but this strategy can be difficult to implement. Better tools for phrenic nerve protection are desirable. © 2015 American Heart Association, Inc.

  13. Office-based esophageal dilation in head and neck cancer: Safety, feasibility, and cost analysis.

    PubMed

    Howell, Rebecca J; Schopper, Melissa A; Giliberto, John Paul; Collar, Ryan M; Khosla, Sid M

    2018-02-08

    To review experience, safety, and cost of office-based esophageal dilation in patients with history of head and neck cancer (HNCA). The medical records of patients undergoing esophageal dilation in the office were retrospectively reviewed between August 2015 and May 2017. Patients were given nasal topical anesthesia. Next, a transnasal esophagoscopy (TNE) was performed. If the patient tolerated TNE, we proceeded with esophageal dilation using Seldinger technique with the CRE™ Boston Scientific (Boston Scientific Corp., Marlborough, MA) balloon system. Patients were discharged directly from the outpatient clinic. Forty-seven dilations were performed in 22 patients with an average of 2.1 dilations/patient (range 1-10, standard deviation [SD] ± 2.2). Seventeen patients (77%) were male. The average age was 67 years (range 35-78 years, SD ± 8.5). The most common primary site of cancer was oral cavity/oropharynx (n = 10), followed by larynx (n = 6). All patients (100%) had history of radiation treatment. Four patients were postlaryngectomy. The indication for esophageal dilation was esophageal stricture and progressive dysphagia. All dilations occurred in the proximal esophagus. There were no major complications. Three focal, superficial lacerations occurred. Two patients experienced mild, self-limited epistaxis. One dilation was poorly tolerated due to discomfort. One patient required pain medication postprocedure. Office-based esophageal dilation generated $15,000 less in health system charges compared to traditional operating room dilation on average per episode of care. In patients with history of HNCA and radiation, office-based TNE with esophageal dilation appears safe, well-tolerated, and cost-effective. In a small cohort, the technique has low complication rate and is feasible in an otolaryngology outpatient office setting. 4. Laryngoscope, 2018. © 2018 The American Laryngological, Rhinological and Otological Society, Inc.

  14. Deep intubation of 8 Fr guiding catheter to deliver coronary stent graft to seal coronary perforation: a case report.

    PubMed

    Salwan, R; Mathur, A; Jhamb, D K; Seth, A

    2001-09-01

    Coronary perforation is an uncommon complication of angioplasty and is a challenging situation to manage. We describe a case of complex multivessel coronary angioplasty complicated by coronary perforation following balloon rupture that was successfully managed with a coronary stent graft. Delivery of the stent graft to the site of vessel rupture required deep intubation of an 8 Fr guiding catheter over the shaft of an inflated balloon. In addition to the availability of covered stents, it is essential to be familiar with various skills necessary to deploy these stents. Cathet Cardiovasc Intervent 2001;54:59-62. Copyright 2001 Wiley-Liss, Inc.

  15. Small bowel injury after suprapubic catheter insertion presenting 3 years after initial insertion

    PubMed Central

    Gallagher, Kevin M; Good, Daniel W; Brush, John P; Al-hasso, Ammar; Stewart, Grant D

    2013-01-01

    A 77-year-old woman was referred to urology with blockages of her suprapubic catheter (SPC). The catheter was replaced easily in the emergency department, however, no urine was draining, only a cloudy green fluid was visible. On cystoscopy bilious material was identified in the bladder. There was no catheter visible. There seemed to be a fistulous tract entering the bladder at the left dome. The urethra was dilated, a urethral catheter was placed and the SPC was removed. A CT demonstrated that the SPC tract transfixed a loop of pelvic small bowel and entered the bladder with no intraperitoneal contrast leak. The patient recovered well and did not require laparotomy. This case emphasises that bowel perforation, although rare, must be considered as a complication of SPC placement even years after initial insertion when catheter problems arise. Unusually, we learn that this complication may not present with abdominal pain or peritonism. PMID:24326435

  16. Successful penetration and bougie dilatation with Brockenbrough needle for severely calcified occlusion in superficial femoral artery.

    PubMed

    Makita, Toshio; Suzuki, Kenji; Takizawa, Kaname; Ootomo, Tatsushi; Inoue, Naoto; Meguro, Taiichirou

    2014-04-01

    A 75-year-old hemodialysis patient with right critical limb ischemia received endovascular therapy for a chronic total occlusion (CTO) in a diffusely calcified superficial femoral artery (SFA). During a retrograde approach, a Brockenbrough needle (BN) was able to penetrate the calcified hard plaque formed in the middle segment of the CTO. Moreover, bougie dilatation with the BN allowed balloon crossing and stent deployment, even after failure to pass a 2.0-mm monorail balloon across the plaque. These results suggest that the BN offers a new therapeutic option in the penetration and modification of severely calcified CTO in SFA.

  17. Controlled dilatation of the uterine cervix--an experimental visceral pain model.

    PubMed

    Bajaj, Priti; Drewes, Asbjørn M; Gregersen, Hans; Petersen, Poul; Madsen, Hans; Arendt-Nielsen, Lars

    2002-10-01

    Pain originating from the female reproductive organs is a substantial clinical problem to treat. Experimental models may be a tool for the study of visceral pain mechanisms and hence provide information to aid in formulating new treatment strategies. The aim was to develop and evaluate the performance and safety of a model for nociceptive stimulation of the uterine cervix by balloon dilatation using impedance planimetry. Three consecutive (repeated) dilatations at 1 ml/min, an isovolumetric and a fast dilatation at 2 ml/min were performed. Pilot studies were conducted in vitro on hysterectomy specimens, followed by application of the model in 14 healthy females. Subjects indicated the quality of perception and pain during dilatations by verbal reports and the McGill Pain Questionnaire (MPQ), and the intensity by a continuous electronic visual analog scale. The pain location was marked on an anatomical map. The balloon cross-sectional area (CSA) was measured simultaneously. The experimental procedure was atraumatic. Pain was evoked in all subjects, with referral to the hypogastric and low back regions. The word descriptors on the MPQ and the areas of referred sensations were similar to that seen clinically in abortion, labor and menstrual pain. The pain intensity correlated with balloon CSA (r=0.9, P<0.001). No significant differences were found for the balloon volumes (4.2, 3.8 and 3.9 ml) or CSA (163, 122 and 123 mm(2)) to pain threshold (PT) for repeated dilatations, suggesting the reliability of the model. There was significant correlation between the balloon volume and CSA to reach the PT for single and repeated cervical dilatations. During isovolumetric distension, greater overall pain intensity was demonstrated for the prolonged as compared to the shorter duration cervical stimulation. In conclusion, this is the first human experimental pain model for dilatation of the uterine cervix, providing a safe, controlled, quantifiable stimulus that evoked reliable

  18. Experimental comparison of manually inflatable versus autoinflatable retrograde cardioplegia catheters.

    PubMed

    Menasché, P

    1994-08-01

    A pig model of cardiopulmonary bypass and cardioplegic arrest was used to compare leakage around manually inflatable and autoinflatable retrograde coronary sinus cardioplegia catheters. Warm and cold blood cardioplegia were alternately delivered through the catheter under study at both low (16 to 24 mm Hg) and high (30 to 40 mm Hg) perfusion pressures. During each experiment, the coronary sinus ostium was sealed around the shaft of the retrograde cannula so that all backflow occurring during cardioplegia delivery could be collected by a separate drainage catheter inserted directly into the coronary sinus approximately midway between the right atrium and the distal end of the balloon. Only two of the 52 manually inflatable cannulas leaked. The leakage in both cases was negligible (< 1% of the total retrograde cardioplegia flow). In contrast, leakage occurred with 57 of the 73 autoinflatable devices tested (p < 0.0001) and averaged 22% +/- 3% (mean +/- the standard error of the mean) of the total retrograde flow. The temperature of the cardioplegia solution had no effect on leakage. These results suggest that autoinflatable balloons inconsistently seal the coronary sinus during cardioplegia infusion, thereby decreasing the amount of flow that effectively reaches the myocardium. This should make surgeons cautious about using them with warm blood cardioplegia, which largely relies upon the delivery of sufficiently high retrograde nutritive flows for preventing cardioprotective aerobic arrest from becoming a life-threatening ischemic arrest.

  19. Misdiagnoses caused by use of indwelling urethral catheters in children with ureterovesical junction anomalies.

    PubMed

    Çelebi, Süleyman; Sander, Serdar; Kuzdan, Özgür; Özaydın, Seyithan; Güvenç, Ünal; Yavuz, Sevgi; Kıyak, Aysel; Demirali, Oyhan

    2015-04-01

    Children commonly undergo vesicograms for diagnosing vesicoureteral reflux (VUR). This requires urethral catheterization with transurethral replacement. We report misdiagnosed or related complications due to indwelling urethral catheters unintentionally placed in the ureter. From our computerized urology records over an 18-year period from January 1995 to May 2013, we retrospectively identified nine cases of 1850 vesicograms that had misdirection of a urethral catheter placed in a ureter. Foley catheters with inflating balloons were used to obtain the vesicograms. In all, 1850 vesicograms were performed (746 males, 1104 females; age 1 week to 14 years, mean age 3.8 years) using standard radiological techniques. Size 6-10 Fr indwelling urethral catheters were used, depending on the patient's age and gender. In nine cases (five females, four males), a misdirected urethral catheter was discovered in one of the ureters. The urethral catheter was in the left ureter in four patients and in the right ureter in five patients. Cystoscopic examination found ectopic ureteral openings in six patients: at the bladder neck in four and just below the bladder trigone in two. Three patients in this group with ectopic ureters were followed due a misdiagnosis of VUR. The remaining three patients had grade 3 or 4 VUR. In this group, the catheter passed into the ureter because of the enlarged ureterovesical junction. In one patient with VUR, intraparenchymal fluid leakage and transient hematuria occurred due to the rapid tension increase following the fast injection of contrast with liquid to one ureter. Although placing an indwelling urethral catheter is a relatively safe procedure, complications can occur, particularly in patients with ureterovesical anomalies, such as high-grade VUR or an ectopic ureter. Using catheters with inflating balloons can cause rapid increases in tension in the ureter, and related complications.

  20. NASA Super Pressure Balloon

    NASA Technical Reports Server (NTRS)

    Fairbrother, Debbie

    2017-01-01

    NASA is in the process of qualifying the mid-size Super Pressure Balloon (SPB) to provide constant density altitude flight for science investigations at polar and mid-latitudes. The status of the development of the 18.8 million cubic foot SPB capable of carrying one-tone of science to 110,000 feet, will be given. In addition, the operating considerations such as launch sites, flight safety considerations, and recovery will be discussed.

  1. NASA Super Pressure Balloon

    NASA Technical Reports Server (NTRS)

    Fairbrother, Debbie

    2016-01-01

    NASA is in the process of qualifying the mid-size Super Pressure Balloon (SPB) to provide constant density altitude flight for science investigations at polar and mid-latitudes. The status of the development of the 18.8 million cubic foot SPB capable of carrying one-tonne of science to 110,000 feet, will be given. In addition, the operating considerations such as launch sites, flight safety considerations, and recovery will be discussed.

  2. Blood pressure normalization post-jugular venous balloon angioplasty.

    PubMed

    Sternberg, Zohara; Grewal, Prabhjot; Cen, Steven; DeBarge-Igoe, Frances; Yu, Jinhee; Arata, Michael

    2015-05-01

    This study is the first in a series investigating the relationship between autonomic nervous system dysfunction and chronic cerebrospinal venous insufficiency in multiple sclerosis patients. We screened patients for the combined presence of the narrowing of the internal jugular veins and symptoms of autonomic nervous system dysfunction (fatigue, cognitive dysfunction, sleeping disorders, headache, thermal intolerance, bowel/bladder dysfunction) and determined systolic and diastolic blood pressure responses to balloon angioplasty. The criteria for eligibility for balloon angioplasty intervention included ≥ 50% narrowing in one or both internal jugular veins, as determined by the magnetic resonance venography, and ≥ 3 clinical symptoms of autonomic nervous system dysfunction. Blood pressure was measured at baseline and post-balloon angioplasty. Among patients who were screened, 91% were identified as having internal jugular veins narrowing (with obstructing lesions) combined with the presence of three or more symptoms of autonomic nervous system dysfunction. Balloon angioplasty reduced the average systolic and diastolic blood pressure. However, blood pressure categorization showed a biphasic response to balloon angioplasty. The procedure increased blood pressure in multiple sclerosis patients who presented with baseline blood pressure within lower limits of normal ranges (systolic ≤ 105 mmHg, diastolic ≤ 70 mmHg) but decreased blood pressure in patients with baseline blood pressure above normal ranges (systolic ≥ 130 mmHg, diastolic ≥ 80 mmHg). In addition, gender differences in baseline blood pressure subcategories were observed. The coexistence of internal jugular veins narrowing and symptoms of autonomic nervous system dysfunction suggests that the two phenomena may be related. Balloon angioplasty corrects blood pressure deviation in multiple sclerosis patients undergoing internal jugular vein dilation. Further studies should investigate the

  3. Bladder Morphology Using 2 Different Catheter Designs

    ClinicalTrials.gov

    2017-04-10

    Urologic Injuries; Urologic Diseases; Bladder Infection; Urinary Tract Infections; Mucosal Inflammation; Mucosal Infection; Bladder Injury; Catheter-Related Infections; Catheter Complications; Catheter; Infection (Indwelling Catheter); Pelvic Floor Disorders; Urinary Incontinence

  4. Central Venous Catheter (Central Line)

    MedlinePlus

    ... the skin entry site. With care, central venous catheters can remain in the body for several months without becoming infected. ■ ■ Blocking or kinking— Blood clots may begin to form in the catheter but ...

  5. Optimum designs for superpressure balloons

    NASA Astrophysics Data System (ADS)

    Smith, M. S.; Rainwater, E. L.

    2004-01-01

    The elastica shape is now well known to be the best basic shape for superpressure balloon design. This shape, also known as the pumpkin, or natural shape for balloons, has been well understood since the early 1900s when it was applied to the determination of the shape of descending parachutes. The elastica shape was also investigated in the 1950s when high strength films were used to produce superpressure cylinder balloons. The need for uniform stress distribution in shells of early superpressure balloons led to a long period of the development of spherical superpressure balloons. Not until the late 1970s was the elastica shape revisited for the purpose of the producing superpressure balloons. This paper will review various development efforts in the field of superpressure design and will elaborate on the current state-of-the-art with suggestions for future developments.

  6. An Intelligent Catheter System Robotic Controlled Catheter System

    PubMed Central

    Negoro, M.; Tanimoto, M.; Arai, F.; Fukuda, T.; Fukasaku, K.; Takahashi, I.; Miyachi, S.

    2001-01-01

    Summary We have developed a novel catheter system, an intelligent catheter system, which is able to control a catheter by an externally-placed controller. This system has made from master-slave mechanism and has following three components; 1) a joy stick as a master (for operators) 2)a catheter controller as a slave (for a patient),3)a micro force sensor as a sensing device. This catheter tele-guiding system has abilities to perform intravascular procedures from the distant places. It may help to reduce the radiation exposures to the operators and also to help train young doctors. PMID:20663387

  7. A comparison among four tract dilation methods of percutaneous nephrolithotomy: a systematic review and meta-analysis.

    PubMed

    Dehong, Cao; Liangren, Liu; Huawei, Liu; Qiang, Wei

    2013-11-01

    The purpose of this study was to evaluate the efficacy and safety of the Amplatz dilation (AD), metal telescopic dilation (MTD), balloon dilation (BD), and one-shot dilation (OSD) methods for tract dilation during percutaneous nephrolithotomy (PCNL). Relevant eligible studies were identified using three electronic databases (Medline, EMBASE, and Cochrane CENTRAL). Database acquisition and quality evaluation were independently performed by two reviewers. Efficacy (stone-free rate, surgical duration, and tract dilatation fluoroscopy time) and safety (transfusion rate and hemoglobin decrease) were evaluated using Review Manager 5.2. Four randomized controlled trials and eight clinical controlled trials involving 6,820 patients met the inclusion criteria. The pooled result from a meta-analysis showed statistically significant differences in tract dilatation fluoroscopy time and hemoglobin decrease between the OSD and MTD groups, which showed comparable stone-free and transfusion rates. Significant differences in transfusion rate were found between the BD and MTD groups. Among patients without previous open renal surgery, those who underwent BD exhibited a lower blood transfusion rate and a shorter surgical duration compared with those who underwent AD. The OSD technique is safer and more efficient than the MTD technique for tract dilation during PCNL, particularly in patients with previous open renal surgery, resulting in a shorter tract dilatation fluoroscopy time and a lesser decrease in hemoglobin. The efficacy and safety of BD are better than AD in patients without previous open renal surgery. The OSD technique should be considered for most patients who undergo PCNL therapy.

  8. Catheter-associated UTI

    MedlinePlus

    ... UTI; Health care-associated UTI; Catheter-associated bacteriuria; Hospital acquired-UTI Images Bladder catheterization, female Bladder catheterization, male References Calfee DP. Prevention and control of health care-associated infections. In: Goldman L, Schafer AI, eds. Goldman's Cecil ...

  9. Central venous catheter - flushing

    MedlinePlus

    ... on a pair of sterile gloves. Remove the cap on the saline syringe and set the cap down on the paper towel. DO NOT let ... It is a good idea to change the caps at the end of your catheter (called the " ...

  10. GuideLiner™ as guide catheter extension for the unreachable mammary bypass graft.

    PubMed

    Vishnevsky, Alec; Savage, Michael P; Fischman, David L

    2018-03-09

    Percutaneous coronary intervention (PCI) of mammary artery bypass grafts through a trans-radial (TR) approach can present unique challenges, including coaxial vessel engagement of the guiding catheter, adequate visualization of the target lesion, sufficient backup support for equipment delivery, and the ability to reach very distal lesions. The GuideLiner catheter, a rapid exchange monorail mother-in-daughter system, facilitates successful interventions in such challenging anatomy. We present a case of a patient undergoing PCI of a right internal mammary artery (RIMA) graft via TR access in whom the graft could not be engaged with any guiding catheter. Using a balloon tracking technique over a guidewire, a GuideLiner was placed as an extension of the guiding catheter and facilitated TR-PCI by overcoming technical challenges associated with difficult anatomy. © 2018 Wiley Periodicals, Inc.

  11. Incremental balloon deflation following complete resuscitative endovascular balloon occlusion of the aorta results in steep inflection of flow and rapid reperfusion in a large animal model of hemorrhagic shock.

    PubMed

    Davidson, Anders J; Russo, Rachel M; Ferencz, Sarah-Ashley E; Cannon, Jeremy W; Rasmussen, Todd E; Neff, Lucas P; Johnson, M Austin; Williams, Timothy K

    2017-07-01

    To avoid potential cardiovascular collapse after resuscitative endovascular balloon occlusion of the aorta (REBOA), current guidelines recommend methodically deflating the balloon for 5 minutes to gradually reperfuse distal tissue beds. However, anecdotal evidence suggests that this approach may still result in unpredictable aortic flow rates and hemodynamic instability. We sought to characterize aortic flow dynamics following REBOA as the balloon is deflated in accordance with current practice guidelines. Eight Yorkshire-cross swine were splenectomized, instrumented, and subjected to rapid 25% total blood volume hemorrhage. After 30 minutes of shock, animals received 60 minutes of Zone 1 REBOA with a low-profile REBOA catheter. During subsequent resuscitation with shed blood, the aortic occlusion balloon was gradually deflated in stepwise fashion at the rate of 0.5 mL every 30 seconds until completely deflated. Aortic flow rate and proximal mean arterial pressure (MAP) were measured continuously over the period of balloon deflation. Graded balloon deflation resulted in variable initial return of aortic flow (median, 78 seconds; interquartile range [IQR], 68-105 seconds). A rapid increase in aortic flow during a single-balloon deflation step was observed in all animals (median, 819 mL/min; IQR, 664-1241 mL/min) and corresponded with an immediate decrease in proximal MAP (median, 30 mm Hg; IQR, 14.5-37 mm Hg). Total balloon volume and time to return of flow demonstrated no correlation (r = 0.016). This study is the first to characterize aortic flow during balloon deflation following REBOA. A steep inflection point occurs during balloon deflation that results in an abrupt increase in aortic flow and a concomitant decrease in MAP. Furthermore, the onset of distal aortic flow was inconsistent across study animals and did not correlate with initial balloon volume or relative deflation volume. Future studies to define the factors that affect aortic flow during balloon

  12. Post-earthquake dilatancy recovery

    NASA Technical Reports Server (NTRS)

    Scholz, C. H.

    1974-01-01

    Geodetic measurements of the 1964 Niigata, Japan earthquake and of three other examples are briefly examined. They show exponentially decaying subsidence for a year after the quakes. The observations confirm the dilatancy-fluid diffusion model of earthquake precursors and clarify the extent and properties of the dilatant zone. An analysis using one-dimensional consolidation theory is included which agrees well with this interpretation.

  13. Ballooning Comes of Age: Make Your Own Balloon.

    ERIC Educational Resources Information Center

    Eckford, Jim

    1983-01-01

    Provides instructions for building a working model of a hot-air balloon, offering suggestions for a successful flight. Indicates that children can be involved in the projects, for example, by filling in colors in the panels of a balloon drawing. (JN)

  14. Dilatational band formation in bone

    PubMed Central

    Poundarik, Atharva A.; Diab, Tamim; Sroga, Grazyna E.; Ural, Ani; Boskey, Adele L.; Gundberg, Caren M.; Vashishth, Deepak

    2012-01-01

    Toughening in hierarchically structured materials like bone arises from the arrangement of constituent material elements and their interactions. Unlike microcracking, which entails micrometer-level separation, there is no known evidence of fracture at the level of bone’s nanostructure. Here, we show that the initiation of fracture occurs in bone at the nanometer scale by dilatational bands. Through fatigue and indentation tests and laser confocal, scanning electron, and atomic force microscopies on human and bovine bone specimens, we established that dilatational bands of the order of 100 nm form as ellipsoidal voids in between fused mineral aggregates and two adjacent proteins, osteocalcin (OC) and osteopontin (OPN). Laser microdissection and ELISA of bone microdamage support our claim that OC and OPN colocalize with dilatational bands. Fracture tests on bones from OC and/or OPN knockout mice (OC−/−, OPN−/−, OC-OPN−/−;−/−) confirm that these two proteins regulate dilatational band formation and bone matrix toughness. On the basis of these observations, we propose molecular deformation and fracture mechanics models, illustrating the role of OC and OPN in dilatational band formation, and predict that the nanometer scale of tissue organization, associated with dilatational bands, affects fracture at higher scales and determines fracture toughness of bone. PMID:23129653

  15. Telescope Systems for Balloon-Borne Research

    NASA Technical Reports Server (NTRS)

    Swift, C. (Editor); Witteborn, F. C. (Editor); Shipley, A. (Editor)

    1974-01-01

    The proceedings of a conference on the use of balloons for scientific research are presented. The subjects discussed include the following: (1) astronomical observations with balloon-borne telescopes, (2) orientable, stabilized balloon-borne gondola for around-the-world flights, (3) ultraviolet stellar spectrophotometry from a balloon platform, (4) infrared telescope for balloon-borne infrared astronomy, and (5) stabilization, pointing, and command control of balloon-borne telescopes.

  16. Catheter-related bloodstream infection.

    PubMed

    Goede, Matthew R; Coopersmith, Craig M

    2009-04-01

    Catheter-related bloodstream infections (CR-BSIs) are a common, frequently preventable complication of central venous catheterization. CR-BSIs can be prevented by strict attention to insertion and maintenance of central venous catheters and removing unneeded catheters as soon as possible. Antiseptic- or antibiotic-impregnated catheters are also an effective tool to prevent infections. The diagnosis of CR-BSI is made largely based on culture results. CR-BSIs should always be treated with antibiotics, and except in rare circumstances the infected catheter needs to be removed.

  17. Complication Rates and Patency of Radiologically Guided Mushroom Gastrostomy, Balloon Gastrostomy, and Gastrojejunostomy: A Review of 250 Procedures

    SciTech Connect

    Yip, Doris; Vanasco, Matthew; Funaki, Brian

    2004-01-15

    To compare complication rates and tube performance of percutaneous mushroom gastrostomy, balloon gastrostomy, and gastrojejunostomy. Between September 9, 1999 and April 23, 2001, 203 patients underwent 250 radiologically guided percutaneous gastrostomy and gastrojejunostomy procedures. Follow-up was conducted through chart reviews and review of our interventional radiology database. Procedural and catheter-related complications were recorded. Chi-square statistical analysis was performed. In patients receiving mushroom-retained gastrostomy catheters (n = 114), the major complication rate was 0.88% (n = 1), the minor complication rate was 5.3% (n = 6), and the tube complication rate was 4.4% (n = 5). In patients receiving balloon-retained gastrostomymore » tubes (n = 67), the major complication rate was 0, the minor complication rate was 4.5% (n = 3), and the tube complication rate was 34.3% (n = 23). In patients receiving gastrojejunostomy catheters (n = 69), the major complication rate was 1.4% (n = 1), the minor complication rate was 2.9% (n = 2), and the tube complication rate was 34.8% (n = 24). No statistically significant differences were found between procedural or peri-procedural complications among the different types of tubes. Mushroom-retained catheters had significantly fewer tube complications (p < 0.01). Percutaneous gastrostomy and gastrojejunostomy have similar procedural and peri-procedural complication rates. Mushroom gastrostomy catheters have fewer tube-related complications compared with balloon gastrostomy and gastrojejunostomy catheters. In addition, mushroom-retained catheters exhibit the best overall long-term tube patency and are therefore the gastrostomy catheter of choice.« less

  18. [Endoscopic dilatation of benign colon and rectum stenosis].

    PubMed

    Rivera Vega, Juan; Frisancho Velarde, Oscar; Cervera, Zenón; Ruiz, Edwin; Yoza, Max; Larrea, Pedro

    2002-01-01

    To determine the usefulness of endoscopic dilatation in dealing with benign stenosis of the anus, rectum and colon. PATIENTS AND METHODS USED: Thirty six (36) patients with stenosis, anus (8), rectum (22) and colon (6) were given endoscopic treatment using hydroneumatic balloons, electro incision (radiated cuts) or a combination of both. Rigid equipment (metal) was used for distal stenosis. Age ranged between 30 and 82 years. Twelve (12) patients were male and 24 female. The diameter of the stenosis was less than 13 mm in 18 of the patients and 11 patients carried colostomy. All 36 patients were subjected to a total of 113 dilatation sessions. The average number of sessions per patient for patients with anal stenosis was 2.5 and for patients with colorectal stenosis, 3.32. One patient with rectal stenosis required 21 sessions to achieve final objective. The result achieved was good in 31 patients, less than satisfactory in 3 patients and bad in one patient, who presented a stenosis which was over 5 cm long. We lost track of a patient in the follow up stage. Success in closing the colostomy was achieved in 9 patients, while one presented a complication due to the procedure (cervical emphysema) which remitted with medical attention. Endoscopic dilatation offers, through its different techniques, a safe and efficient method for the treatment of benign stenosis of the anus, rectum and colon and must be considered as a first class tool for the treatment of this kind of pathologies.

  19. Minimally invasive fluoroscopic percutaneous peritoneal dialysis catheter salvage.

    PubMed

    Narayan, Rajeev; Fried, Terrance; Chica, Gerardo; Schaefer, Mathew; Mullins, Daniel

    2014-06-01

    Peritoneal dialysis catheter (PDC) dysfunction can often be treated fluoroscopically by manipulation with wire, balloon or stiff stylet, saving surgical intervention for refractory cases. We describe an enhanced percutaneous approach to PDC salvage that can lead to a more definitive intervention and salvage for cases refractory to fluoroscopic manipulation. In five cases of PD catheter malfunction, the deep cuff was dissected free after a 0.035 hydrophilic wire was passed into the peritoneum through the PDC. Only the intraperitoneal portion of the PDC was explanted. The PDC was cleared of obstruction and omentum. The intraperitoneal portion of the PDC was reimplanted over wire via a peel-away sheath and the deep cuff sutured. Omental entrapment was present in three of five patients and fibrin occlusion in four of the five cases. All catheters were repaired successfully by the described technique. Post procedure, 3-5 days of lower volume, recumbent PD exchanges were performed prior to full-dose PD. No perioperative complications or leaks were noted. All PDCs were patent at 6 months. One patient required laparoscopy for recurrent omental wrapping 3 months post intervention. PDC salvage in this manner is a cost-effective alternative to laparoscopic repair of PDCs failing catheter manipulation. The infection barrier afforded by the original superficial cuff and subcutaneous tunnel is maintained. PD can be resumed immediately. Only refractory cases need laparoscopy. This procedure allows for a more definitive correction of catheter migration and obstruction, avoids placement of a new PDC or temporary hemodialysis, is cost-effective and expands percutaneous options for dysfunctional PD catheters.

  20. Bi-layer sandwich film for antibacterial catheters

    PubMed Central

    Schamberger, Florian; Zare, Hamideh Heidari; Bröskamp, Sara Felicitas; Jocham, Dieter

    2017-01-01

    Background: Approximately one quarter of all nosocomial infections can be attributed to the urinary tract. The infections are supposed to be mainly caused by implantations of urethral catheters and stents. A new catheter design is introduced with the aim to lower the high number of nosocomial urethral infections. In order to avoid limitations to use, the design is first applied to conventional commercially available balloon catheters. Results: The main feature of the design is a sandwich layer on both sides of the catheter wall, which is composed of a fragmented base layer of silver capped by a thin film of poly(p-xylylene). This top layer is mainly designed to release a controlled amount of Ag+ ions, which is bactericidal, but not toxic to humans. Simultaneously, the lifetime is prolonged to at least one year. The base layer is electrolessly deposited applying Tollens’ reagens, the cap layer is deposited by using chemical vapor deposition. Conclusion: The three main problems of this process, electroless deposition of a fragmented silver film on the surface of an electrically insulating organic polymer, irreproducible evaporation during heating of the precursor, and exponential decrease of the layer thickness along the capillary, have been solved trough the application of a simple electrochemical reaction and two standard principles of physics: Papin’s pot and the principle of Le Chatelier. PMID:29046846

  1. Bi-layer sandwich film for antibacterial catheters.

    PubMed

    Franz, Gerhard; Schamberger, Florian; Zare, Hamideh Heidari; Bröskamp, Sara Felicitas; Jocham, Dieter

    2017-01-01

    Background: Approximately one quarter of all nosocomial infections can be attributed to the urinary tract. The infections are supposed to be mainly caused by implantations of urethral catheters and stents. A new catheter design is introduced with the aim to lower the high number of nosocomial urethral infections. In order to avoid limitations to use, the design is first applied to conventional commercially available balloon catheters. Results: The main feature of the design is a sandwich layer on both sides of the catheter wall, which is composed of a fragmented base layer of silver capped by a thin film of poly( p -xylylene). This top layer is mainly designed to release a controlled amount of Ag + ions, which is bactericidal, but not toxic to humans. Simultaneously, the lifetime is prolonged to at least one year. The base layer is electrolessly deposited applying Tollens' reagens, the cap layer is deposited by using chemical vapor deposition. Conclusion: The three main problems of this process, electroless deposition of a fragmented silver film on the surface of an electrically insulating organic polymer, irreproducible evaporation during heating of the precursor, and exponential decrease of the layer thickness along the capillary, have been solved trough the application of a simple electrochemical reaction and two standard principles of physics: Papin's pot and the principle of Le Chatelier.

  2. A Methane Balloon Inflation Chamber

    ERIC Educational Resources Information Center

    Czerwinski, Curtis J.; Cordes, Tanya J.; Franek, Joe

    2005-01-01

    The various equipments, procedure and hazards in constructing the device for inflating a methane balloon using a standard methane outlet in a laboratory are described. This device is fast, safe, inexpensive, and easy to use as compared to a hydrogen gas cylinder for inflating balloons.

  3. Aerodynamics of a Party Balloon

    ERIC Educational Resources Information Center

    Cross, Rod

    2007-01-01

    It is well-known that a party balloon can be made to fly erratically across a room, but it can also be used for quantitative measurements of other aspects of aerodynamics. Since a balloon is light and has a large surface area, even relatively weak aerodynamic forces can be readily demonstrated or measured in the classroom. Accurate measurements…

  4. Scientific Balloons for Venus Exploration

    NASA Astrophysics Data System (ADS)

    Cutts, James; Yavrouian, Andre; Nott, Julian; Baines, Kevin; Limaye, Sanjay; Wilson, Colin; Kerzhanovich, Viktor; Voss, Paul; Hall, Jeffery

    Almost 30 years ago, two balloons were successfully deployed into the atmosphere of Venus as an element of the VeGa - Venus Halley mission conducted by the Soviet Union. As interest in further Venus exploration grows among the established planetary exploration agencies - in Europe, Japan, Russia and the United States, use of balloons is emerging as an essential part of that investigative program. Venus balloons have been proposed in NASA’s Discovery program and ESA’s cosmic vision program and are a key element in NASA’s strategic plan for Venus exploration. At JPL, the focus for the last decade has been on the development of a 7m diameter superpressure pressure(twice that of VeGa) capable of carrying a 100 kg payload (14 times that of VeGA balloons), operating for more than 30 days (15 times the 2 day flight duration of the VeGa balloons) and transmitting up to 20 Mbit of data (300 times that of VeGa balloons). This new generation of balloons must tolerate day night transitions on Venus as well as extended exposure to the sulfuric acid environment. These constant altitude balloons operating at an altitude of about 55 km on Venus where temperatures are benign can also deploy sondes to sound the atmosphere beneath the probe and deliver deep sondes equipped to survive and operate down to the surface. The technology for these balloons is now maturing rapidly and we are now looking forward to the prospects for altitude control balloons that can cycle repeatedly through the Venus cloud region. One concept, which has been used for tropospheric profiling in Antarctica, is the pumped-helium balloon, with heritage to the anchor balloon, and would be best adapted for flight above the 55 km level. Phase change balloons, which use the atmosphere as a heat engine, can be used to investigate the lower cloud region down to 30 km. Progress in components for high temperature operation may also enable investigation of the deep atmosphere of Venus with metal-based balloons.

  5. Evaluation of balloon withdrawal forces with bare-metal stents, compared with Taxus and Cypher drug-eluting coronary stents: balloon, stent and polymer interactions.

    PubMed

    Turk, Marvee; Gupta, Vishal; Fischell, Tim A

    2010-03-01

    There have been reports of serious complications related to difficulty removing the deflated Taxus stent delivery balloon after stent deployment. The purpose of this study was to determine whether the Taxus SIBS polymer was "sticky" and associated with an increase in the force required to remove the stent delivery balloon after stent deployment, using a quantitative, ex-vivo model. Balloon-polymer-stent interactions during balloon withdrawal were measured with the Taxus Liberté, Liberté bare-metal stent (BMS; no polymer = control), the Cordis Cypher drug-eluting stent (DES; PEVA/PBMA polymer) and the BX Velocity (no polymer). We quantitatively measured the force required to remove the deflated stent delivery balloon from each of these stents in simulated vessels at 37 degrees C in a water bath. Balloon withdrawal forces were measured in straight (0 degree curve), mildly curved (20 degree curve) and moderately curved (40 degree curve) simulated vessel segments. The average peak force required to remove the deflated balloon catheter from the Taxus Liberté DES, the Liberté BMS, the Cypher DES, and the Bx Velocity BMS were similar in straight segments, but were much greater for the Taxus Liberté in the moderately curved segments (1.4 lbs vs. 0.11 lbs, 0.11 lbs and 0.12 lbs, respectively; p < 0.0001). The SIBS polymer of the Taxus Liberté DES appears to be "sticky" and is associated with high forces required to withdraw the deflated balloon from the deployed stent in curved segments. This withdrawal issue may help to explain the clinical complications that have been reported with this device.

  6. Comparing the 12-month patency of low- versus high-pressure dilation in failing arteriovenous fistulae: A prospective multicenter trial (YOROI study).

    PubMed

    Wakamoto, Koki; Doi, Shigehiro; Nakashima, Ayumu; Kawai, Toru; Kyuden, Yasufumi; Naito, Takayuki; Asai, Mariko; Takahashi, Shunsuke; Murakami, Masaaki; Masaki, Takao

    2018-03-01

    This study was performed to investigate the effect of the balloon dilation pressure on the 12-month patency rate in patients with failed arteriovenous fistulas undergoing hemodialysis. In this multicenter, prospective, randomized trial, the 4-mm-diameter YOROI balloon was used for dilation of stenotic lesions. The balloons were inflated to a pressure of 8 atm (low-pressure group) or 30 atm to achieve complete expansion (high-pressure group). The 12-month patency rate after balloon angioplasty was analyzed by the Kaplan-Meier method and log-rank test and/or a Cox proportional hazard model. We also investigated the dilation pressure required to achieve complete expansion in the high-pressure group. In total, 71 patients were enrolled and allocated to either the low-pressure group (n = 34) or the high-pressure group (n = 37). The 12-month patency rates showed no significant difference between the low- and high-pressure groups (47% and 49%, respectively; p = 0.87). In the low-pressure group, the patency rate was not different between patients with complete dilation and residual stenosis (44% and 50%, respectively; p = 0.87). The Cox proportional hazard model revealed that the 12-month patency rate was associated with the stenosis diameter (hazard ratio 0.36; p = 0.001) and the presence of diabetes (hazard ratio 0.33; p = 0.018). Finally, the pressure required to achieve complete dilation was ≤20 atm in 76% of patients and ≤30 atm in 97% of patients. One patient required a dilation pressure of >30 atm. The patency rate does not differ between low-pressure dilation and high-pressure dilation.

  7. Nationwide Eclipse Ballooning Project

    NASA Astrophysics Data System (ADS)

    Colman Des Jardins, Angela; Berk Knighton, W.; Larimer, Randal; Mayer-Gawlik, Shane; Fowler, Jennifer; Harmon, Christina; Koehler, Christopher; Guzik, Gregory; Flaten, James; Nolby, Caitlin; Granger, Douglas; Stewart, Michael

    2016-05-01

    The purpose of the Nationwide Eclipse Ballooning Project is to make the most of the 2017 rare eclipse event in four main areas: public engagement, workforce development, partnership development, and science. The Project is focused on two efforts, both student-led: online live video of the eclipse from the edge of space and the study of the atmospheric response to the eclipse. These efforts, however, involving more than 60 teams across the US, are challenging in many ways. Therefore, the Project is leveraging the NASA Space Grant and NOAA atmospheric science communities to make it a success. The first and primary topic of this poster is the NASA Space Grant supported online live video effort. College and high school students on 48 teams from 31 states will conduct high altitude balloon flights from 15-20 locations across the 8/21/2017 total eclipse path, sending live video and images from near space to a national website. Video and images of a total solar eclipse from near space are fascinating and rare. It’s never been done live and certainly not in a network of coverage across a continent. In addition to the live video to the web, these teams are engaged in several other science experiments as secondary payloads. We also briefly highlight the eclipse atmospheric science effort, where about a dozen teams will launch over one hundred radiosondes from across the 2017 path, recording an unprecedented atmospheric data sample. Collected data will include temperature, density, wind, humidity, and ozone measurements.

  8. Expert Opinion: Optimising Stent Deployment in Contemporary Practice: The Role of Intracoronary Imaging and Non-compliant Balloons.

    PubMed

    Seth, Ashok; Gupta, Sajal; Pratap Singh, Vivudh; Kumar, Vijay

    2017-09-01

    Final stent dimensions remain an important predictor of restenosis, target vessel revascularisation (TVR) and subacute stent thrombosis (ST), even in the drug-eluting stent (DES) era. Stent balloons are usually semi-compliant and thus even high-pressure inflation may not achieve uniform or optimal stent expansion. Post-dilatation with non-compliant (NC) balloons after stent deployment has been shown to enhance stent expansion and could reduce TVR and ST. Based on supporting evidence and in the absence of large prospective randomised outcome-based trials, post-dilatation with an NC balloon to achieve optimal stent expansion and maximal luminal area is a logical technical recommendation, particularly in complex lesion subsets.

  9. Successful Treatment by Balloon Angioplasty Under Portography for Late-Onset Stenosis of Portal Vein After Cadaveric Liver Transplantation

    PubMed Central

    Shiba, Hiroaki; Sadaoka, Shunichi; Wakiyama, Shigeki; Ishida, Yuichi; Misawa, Takeyuki; Yanaga, Katsuhiko

    2013-01-01

    A 69-year-old woman, who underwent cadaveric liver transplantation for non-B, non-C liver cirrhosis with hepatocellular carcinoma in April 2009, was admitted to our hospital because of graft dysfunction. Enhanced computed tomography revealed stenosis of the left branch of the portal vein, obstruction of the right branch of the portal vein at porta hepatis, and esophagogastric varices. Balloon angioplasty of the left branch of the portal vein under transsuperior mesenteric venous portography was performed by minilaparotomy. After dilatation of the left branch of the portal vein, the narrow segment of the portal vein was dilated, which resulted in reduction of collateral circulation. At 7 days after balloon angioplasty, esophageal varices were improved. The patient made a satisfactory recovery, was discharged 8 days after balloon angioplasty, and remains well. PMID:24229043

  10. Catheter associated urinary tract infections

    PubMed Central

    2014-01-01

    Urinary tract infection attributed to the use of an indwelling urinary catheter is one of the most common infections acquired by patients in health care facilities. As biofilm ultimately develops on all of these devices, the major determinant for development of bacteriuria is duration of catheterization. While the proportion of bacteriuric subjects who develop symptomatic infection is low, the high frequency of use of indwelling urinary catheters means there is a substantial burden attributable to these infections. Catheter-acquired urinary infection is the source for about 20% of episodes of health-care acquired bacteremia in acute care facilities, and over 50% in long term care facilities. The most important interventions to prevent bacteriuria and infection are to limit indwelling catheter use and, when catheter use is necessary, to discontinue the catheter as soon as clinically feasible. Infection control programs in health care facilities must implement and monitor strategies to limit catheter-acquired urinary infection, including surveillance of catheter use, appropriateness of catheter indications, and complications. Ultimately, prevention of these infections will require technical advances in catheter materials which prevent biofilm formation. PMID:25075308

  11. Inadvertent positioning of suprapubic catheter in urethra: a serious complication during change of suprapubic cystostomy in a spina bifida patient - a case report

    PubMed Central

    2009-01-01

    Introduction Spinal cord injury patients are at risk for developing unusual complications such as autonomic dysreflexia while changing suprapubic cystostomy. We report a male patient with spina bifida in whom the Foley catheter was placed in the urethra during change of suprapubic cystostomy with serious consequences. Case presentation A male patient, born in 1972 with spina bifida and paraplaegia, underwent suprapubic cystostomy in 2003 because of increasing problems with urethral catheter. The patient would come to spinal unit for change of suprapubic catheter every four to six weeks. Two days after a routine catheter change in November 2009, this patient woke up in the morning and noticed that the suprapubic catheter had come out. He went straight to Accident and Emergency. The suprapubic catheter was changed by a health professional and this patient was sent home. But the suprapubic catheter did not drain urine. This patient developed increasing degree of pain and swelling in suprapubic region. He did not pass any urine per urethra. He felt sick and came to spinal unit five hours later. About twenty ml of contrast was injected through suprapubic catheter and X-rays were taken. The suprapubic catheter was patent; the catheter was not blocked. The Foley catheter could be seen going around in a circular manner through the urinary bladder into the urethra. The contrast did not opacify urinary bladder; but proximal urethra was seen. The tip of Foley catheter was lying in proximal urethra. The balloon of Foley catheter had been inflated in urethra. When the balloon of Foley catheter was deflated, this patient developed massive bleeding per urethra. A sterile 22 French Foley catheter was inserted through suprapubic track. The catheter drained bloody urine. He was admitted to spinal unit and received intravenous fluids and meropenem. Haematuria subsided after 48 hours. The patient was discharged home a week later in a stable condition. Conclusion This case shows that

  12. Inadvertent positioning of suprapubic catheter in urethra: a serious complication during change of suprapubic cystostomy in a spina bifida patient - a case report.

    PubMed

    Vaidyanathan, Subramanian; Hughes, Peter L; Soni, Bakul M; Oo, Tun; Singh, Gurpreet

    2009-12-22

    Spinal cord injury patients are at risk for developing unusual complications such as autonomic dysreflexia while changing suprapubic cystostomy. We report a male patient with spina bifida in whom the Foley catheter was placed in the urethra during change of suprapubic cystostomy with serious consequences. A male patient, born in 1972 with spina bifida and paraplaegia, underwent suprapubic cystostomy in 2003 because of increasing problems with urethral catheter. The patient would come to spinal unit for change of suprapubic catheter every four to six weeks. Two days after a routine catheter change in November 2009, this patient woke up in the morning and noticed that the suprapubic catheter had come out. He went straight to Accident and Emergency. The suprapubic catheter was changed by a health professional and this patient was sent home. But the suprapubic catheter did not drain urine. This patient developed increasing degree of pain and swelling in suprapubic region. He did not pass any urine per urethra. He felt sick and came to spinal unit five hours later. About twenty ml of contrast was injected through suprapubic catheter and X-rays were taken. The suprapubic catheter was patent; the catheter was not blocked. The Foley catheter could be seen going around in a circular manner through the urinary bladder into the urethra. The contrast did not opacify urinary bladder; but proximal urethra was seen. The tip of Foley catheter was lying in proximal urethra. The balloon of Foley catheter had been inflated in urethra. When the balloon of Foley catheter was deflated, this patient developed massive bleeding per urethra. A sterile 22 French Foley catheter was inserted through suprapubic track. The catheter drained bloody urine. He was admitted to spinal unit and received intravenous fluids and meropenem. Haematuria subsided after 48 hours. The patient was discharged home a week later in a stable condition. This case shows that serious complications can occur during

  13. Intra-Aortic Balloon Pump Malposition Reduces Visceral Artery Perfusion in an Acute Animal Model.

    PubMed

    Vondran, Maximilian; Rastan, Ardawan J; Tillmann, Eugen; Seeburger, Jörg; Schröter, Thomas; Dhein, Stefan; Bakhtiary, Farhad; Mohr, Friedrich-Wilhelm

    2016-04-01

    Visceral artery perfusion can be potentially affected by intra-aortic balloon pump (IABP) catheters. We utilized an animal model to quantify the acute impact of a low balloon position on mesenteric artery perfusion. In six pigs (78 ± 7 kg), a 30-cc IABP was placed in the descending aorta in a transfemoral procedure. The celiac artery (CA) and the cranial mesenteric artery (CMA) were surgically dissected. Transit time blood flow was measured for (i) baseline, (ii) 1:1 augmentation with the balloon proximal to the visceral arteries, and (iii) 1:1 augmentation with the balloon covering the visceral arteries. Blood flow in the CMA and CA was reduced by 17 and 24%, respectively, when the balloon compromised visceral arteries compared with a position above the visceral arteries (flow in mL/min: CMA: (i) 1281 ± 512, (ii) 1389 ± 287, (iii) 1064 ± 276, P < 0.05 for 3 vs. 1 and 3 vs. 2; CA: (i) 885 ± 370, (ii) 819 ± 297, (iii) 673 ± 315; P < 0.05 for 3 vs. 1). The covering of visceral arteries by an IABP balloon causes a significant reduction of visceral artery perfusion; thus, the positioning of this device during implantation is critical for obtaining a satisfactory outcome. Copyright © 2015 International Center for Artificial Organs and Transplantation and Wiley Periodicals, Inc.

  14. [Rotational stability of angiography catheters].

    PubMed

    Schröder, J; Weber, M

    1992-10-01

    Rotatory stability is a parameter that reflects the ability of a catheter to transmit a rotation applied at the outer end to the catheter tip for the purpose of selective probing. A method for measuring the rotatory stability is described, and the results of rotatory stability measurements of 70 different commercially available catheters are reported. There is an almost linear correlation between the rotatory stability and the difference between the respective fourth power of the external and internal diameter or, approximately, to the fourth power of the external diameter for catheters without wire reinforcement. With the same cross-sectional dimensions, the rotatory stability of teflon, polyethylene, and nylon catheters has an approximate ratio of 1:2:4. Wire reinforcement increases rotatory stability by an average factor of about 3. For catheters of calibers 5 F and 6 F, a correlation between the rotatory stability and the weight of the reinforcing wire mesh is apparent.

  15. Stability of Lobed Balloons

    NASA Technical Reports Server (NTRS)

    Ball, Danny (Technical Monitor); Pagitz, M.; Pellegrino, Xu S.

    2004-01-01

    This paper presents a computational study of the stability of simple lobed balloon structures. Two approaches are presented, one based on a wrinkled material model and one based on a variable Poisson s ratio model that eliminates compressive stresses iteratively. The first approach is used to investigate the stability of both a single isotensoid and a stack of four isotensoids, for perturbations of in.nitesimally small amplitude. It is found that both structures are stable for global deformation modes, but unstable for local modes at su.ciently large pressure. Both structures are stable if an isotropic model is assumed. The second approach is used to investigate the stability of the isotensoid stack for large shape perturbations, taking into account contact between di.erent surfaces. For this structure a distorted, stable configuration is found. It is also found that the volume enclosed by this con.guration is smaller than that enclosed by the undistorted structure.

  16. Calculating Payload for a Tethered Balloon System

    Treesearch

    Charles D. Tangren

    1980-01-01

    A graph method to calculate payload for a tethered balloon system, with the supporting helium lift and payload equations. is described. The balloon system is designed to collect emissions data during the convective-lift and no-convective-lift phases of a forest fire. A description of the balloon system and a list of factors affecting balloon selection are included....

  17. Hot-Air Ballooning in Physics Teaching.

    ERIC Educational Resources Information Center

    Haugland, Ole Anton

    1991-01-01

    Describes the modern hot-air balloon and the physics of ballooning. Proposes that students construct their own hot-air balloon and presents an experiment calculating the time needed for a balloon to rise to the ceiling of a gymnasium. (MDH)

  18. Air Force Cambridge Research Laboratories balloon operations

    NASA Technical Reports Server (NTRS)

    Danaher, T. J.

    1974-01-01

    The establishment and functions of the AFCRL balloon operations facility are discussed. The types of research work conducted by the facility are defined. The facilities which support the balloon programs are described. The free balloon and tethered balloon capabilities are analyzed.

  19. Use of an angiographic catheter to facilitate fluoroscopy-guided percutaneous renal access in cases with diffuse contrast extravasation.

    PubMed

    Giannakopoulos, Stilianos; Bantis, Athanasios; Kalaitzis, Christos; Touloupidis, Stavros

    2010-10-01

    Occasionally during percutaneous surgery, significant contrast extravasation obscures the field, making fluoroscopic access no longer feasible. Herein, we describe a salvage technique. The cystoscopically placed, open-end ureteral catheter is exchanged with an angled-tip angiographic catheter. With the aid of a guidewire and under fluoroscopic guidance, the tip of the catheter is placed in a posterior calix. The "bull's eye" technique is then applied to direct the needle into the tip of the catheter. This technique was used in four cases over a 7-year period. Successful access was accomplished in all cases through a middle or upper calix. The catheter serves as a target for providing access to the renal collecting system and facilitates final tract dilatation.

  20. Diagnostic and therapeutic direct peroral cholangioscopy using an intraductal anchoring balloon

    PubMed Central

    Parsi, Mansour A; Stevens, Tyler; Vargo, John J

    2012-01-01

    AIM: To report our experience using a recently introduced anchoring balloon for diagnostic and therapeutic direct peroral cholangioscopy (DPOC). METHODS: Consecutive patients referred for diagnostic or therapeutic peroral cholangioscopy were evaluated in a prospective cohort study. The patients underwent DPOC using an intraductal anchoring balloon, which was recently introduced to allow consistent access to the biliary tree with an ultraslim upper endoscope. The device was later voluntarily withdrawn from the market by the manufacturer. RESULTS: Fourteen patients underwent DPOC using the anchoring balloon. Biliary access with an ultraslim upper endoscope was accomplished in all 14 patients. In 12 (86%) patients, ductal access required sphincteroplasty with a 10-mm dilating balloon. Intraductal placement of the ultraslim upper endoscope allowed satisfactory visualization of the biliary mucosa to the level of the confluence of the right and left hepatic ducts in 13 of 14 patients (93%). Therapeutic interventions by DPOC were successfully completed in all five attempted cases (intraductal biopsy in one and DPOC guided laser lithotripsy in four). Adverse events occurred in a patient on immunosuppressive therapy who developed an intrahepatic biloma at the site of the anchoring balloon. This required hospitalization and antibiotics. Repeat endoscopic retrograde cholangiopancreatography 8 wk after the index procedure showed resolution of the biloma. CONCLUSION: Use of this anchoring balloon allowed consistent access to the biliary tree for performance of diagnostic and therapeutic DPOC distal to the biliary bifurcation. PMID:22912549

  1. Diagnostic and therapeutic direct peroral cholangioscopy using an intraductal anchoring balloon.

    PubMed

    Parsi, Mansour A; Stevens, Tyler; Vargo, John J

    2012-08-14

    To report our experience using a recently introduced anchoring balloon for diagnostic and therapeutic direct peroral cholangioscopy (DPOC). Consecutive patients referred for diagnostic or therapeutic peroral cholangioscopy were evaluated in a prospective cohort study. The patients underwent DPOC using an intraductal anchoring balloon, which was recently introduced to allow consistent access to the biliary tree with an ultraslim upper endoscope. The device was later voluntarily withdrawn from the market by the manufacturer. Fourteen patients underwent DPOC using the anchoring balloon. Biliary access with an ultraslim upper endoscope was accomplished in all 14 patients. In 12 (86%) patients, ductal access required sphincteroplasty with a 10-mm dilating balloon. Intraductal placement of the ultraslim upper endoscope allowed satisfactory visualization of the biliary mucosa to the level of the confluence of the right and left hepatic ducts in 13 of 14 patients (93%). Therapeutic interventions by DPOC were successfully completed in all five attempted cases (intraductal biopsy in one and DPOC guided laser lithotripsy in four). Adverse events occurred in a patient on immunosuppressive therapy who developed an intrahepatic biloma at the site of the anchoring balloon. This required hospitalization and antibiotics. Repeat endoscopic retrograde cholangiopancreatography 8 wk after the index procedure showed resolution of the biloma. Use of this anchoring balloon allowed consistent access to the biliary tree for performance of diagnostic and therapeutic DPOC distal to the biliary bifurcation.

  2. Balloon-Occluded Carbon Dioxide Gas Angiography for Internal Iliac Arteriography and Intervention.

    PubMed

    Kishino, Mitsuhiro; Nakaminato, Shuichiro; Kitazume, Yoshio; Miyasaka, Naoyuki; Kudo, Toshifumi; Saida, Yukihisa; Tateishi, Ukihide

    2018-07-01

    The usefulness of carbon dioxide (CO 2 ) gas digital subtraction angiography (DSA) has been reported for patients with renal insufficiency and allergy to iodinated contrast agents. However, CO 2 gas cannot replace the iodinated contrast agent in all cases owing to some disadvantages. We describe balloon-occluded CO 2 DSA (B-CO 2 DSA) as an improved CO 2 DSA procedure for interventions in the internal iliac artery (IIA) region and compare the quality of images obtained using conventional CO 2 DSA and B-CO 2 DSA. B-CO 2 DSA-guided embolization was performed for one case of genital bleeding with an acute anaphylactic reaction to the iodinated contrast agent and for three cases of type II endoleaks after endovascular abdominal aortic aneurysm repair with renal dysfunction. A 9-mm occlusion balloon catheter was placed just after the orifice of the IIA. Then, 10-15 ml of CO 2 gas was injected manually via the catheter with and without balloon occlusion. The quality of sequential digital subtraction angiograms was analyzed based on a scoring criterion. In all four cases, image quality was improved with B-CO 2 DSA; the poor quality of images without balloon occlusion was because of reflux of the CO 2 gas. B-CO 2 DSA improves the image quality of CO 2 DSA in the IIA region and is useful for vascular intervention. Level IV.

  3. Solar research with stratospheric balloons

    NASA Astrophysics Data System (ADS)

    Vázquez, Manuel; Wittmann, Axel D.

    Balloons, driven by hot air or some gas lighter than air, were the first artificial machines able to lift payloads (including humans) from the ground. After some pioneering flights the study of the physical properties of the terrestrial atmosphere constituted the first scientific target. A bit later astronomers realized that the turbulence of the atmospheric layers above their ground-based telescopes deteriorated the image quality, and that balloons were an appropriate means to overcome, total or partially, this problem. Some of the most highly-resolved photographs and spectrograms of the sun during the 20th century were actually obtained by balloon-borne telescopes from the stratosphere. Some more recent projects of solar balloon astronomy will also be described.

  4. The radiation controlled balloon (RACOON)

    NASA Astrophysics Data System (ADS)

    Lally, Vincent E.

    The RACOON concept permits the flight of large, low-cost polyethylene balloons for several weeks at stratospheric altitudes without ballast. The theory of operations is described. The RACOON balloon ascends each morning and descends at night. This movement of 15 to 20 km in altitude provides an ideal platform for vertical soundings and sampling measurements in the stratosphere. Results of a number of globe-circling flights are presented.

  5. [Technical feasibility of the implantation of a monorail stent system into the renal arteries without pre-dilatation].

    PubMed

    Neumann, C; Gschwendtner, M; Karnel, F; Mair, J; Dorffner, G; Dorffner, R

    2005-01-01

    To evaluate the technical feasibility of the implantation of the monorail RX Herculink system into the renal arteries without pre-dilatation. Forty-two patients (mean age 71 years) from four centers with a total of 44 renal artery stenoses underwent implantation of the RX Herculink stent. The mean grade of the stenosis was 83.8 %, the mean length 7.5 mm. The stenoses were ostial in 38 cases and in immediate proximity to the ostium in 6 cases. The mean follow-up-period was 57 weeks (24 - 176 weeks). In 42 cases, the implantation was successful without pre-dilatation. In 2 cases, pre-dilatation was carried out. In none of the cases, detachment of the stent from the balloon was observed. In one stenosis with a length of 17 mm, implantation of two stents was performed. In 9 cases, post-dilatation with a larger balloon or higher balloon pressure was necessary. Residual stenoses exceeding 30 % were not observed. Two patients developed local bleeding at the puncture site. During the follow-up, restenoses were observed in 5 stents after 26 to 126 weeks, which necessitated a second intervention in 3 cases (PTA in 2 cases, re-stenting in 1 case). The primary patency rate after 6 and 12 months was 0.92 +/- 0.056 according to Kaplan-Meier, the secondary patency rate after 6 and 12 months was 1.0 +/- 0.0. Implantation of the RX Herculink stent system into the renal arteries without pre-dilatation is technically feasible and safe. Even without pre-dilatation, the stent-system can be advanced through the stenosis without detachment. The complication rate is low. Our clinical results are comparable to previous studies.

  6. Heart catheter cable and connector

    NASA Technical Reports Server (NTRS)

    Harrison, D. R.; Cota, F. L.; Sandler, H.

    1972-01-01

    Ultraminiature catheter cables that are stiff enough for intravenous insertion yet flexible at the tip, sterilizable, and economical are fabricated entirely from commercially available parts. Assembly includes air passageway for reference pressures and coaxial cable for transmission of signals from the tip of catheter.

  7. Catheter interventional treatment of congenital portosystemic venous shunts in childhood.

    PubMed

    Knirsch, Walter; Benz, Dominik C; Bühr, Patrick; Quandt, Daniel; Weber, Roland; Kellenberger, Christian; Braegger, Christian P; Kretschmar, Oliver

    2016-06-01

    The study aimed on the catheter interventional treatment of congenital portosystemic venous shunt (CPSVS) in childhood and the impact on vascular growth of hypoplastic portal veins. Clinical course and follow up of partial or complete closure of CPSVS are described. CPSVS is a very rare vascular malformation of the portal venous drainage resulting in potentially life threatening abdominal, pulmonary, cerebral, and cardiac complications. The anatomic type, clinical course, and diagnosis must be determined for optimal management. Single centre case series. Eight (6 female) children with extrahepatic (n = 5) and intrahepatic (n = 3) CPSVS were diagnosed invasively by catheterization, including test balloon occlusion of the shunt and simultaneous retrograde angiography, and treated by catheter interventions (n = 5) with partial (n = 2) and complete (n = 3) occlusion of CPSVS at a median age of 3.9 years (range 0.7-21). Congenital heart disease (CHD) was the most frequent associated organ manifestation (n = 5) followed by mild to severe pulmonary arterial hypertension (n = 4), hepatopulmonary syndrome (n = 2), and portosystemic encephalopathy (n = 1). CHD was simple (n = 3) or complex type (n = 2). Three patients were untreated so far, because they were in excellent clinical condition at an age <1 year, refused treatment, or planned for later treatment. Accurate invasive diagnosis of CPSVS with test balloon occlusion of the shunt is mandatory to depict the anatomic situation. Catheter interventional treatment of CPSVS offers a feasible and safe approach with complete or partial closure of the vascular malformation inducing potentially significant vascular growth of a former hypoplastic portal venous system. © 2015 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc.

  8. An Onyx tunnel: reconstructive transvenous balloon-assisted Onyx embolization for dural arteriovenous fistula of the transverse-sigmoid sinus.

    PubMed

    Kerolus, Mena G; Chung, Joonho; Munich, Stephen A; Matsuda, Yoshikazu; Okada, Hideo; Lopes, Demetrius K

    2017-11-17

    Transvenous embolization is an effective method for treating dural arteriovenous fistulas (DAVFs) of the transverse-sigmoid sinus (TSS). However, in cases of complicated DAVFs, it is difficult to preserve the patency of the dural sinus. The authors describe the technical details of a new reconstructive technique using transvenous balloon-assisted Onyx embolization as another treatment option in a patient with an extensive and complex DAVF of the left TSS. A microcatheter and compliant balloon catheter were navigated into the left internal jugular vein and placed at the distal end of the DAVF in the transverse sinus. The microcatheter was placed between the vessel wall of the TSS and the balloon. After the balloon was fully inflated, Onyx-18 was injected at the periphery of the balloon in a slow, controlled, progressive, stepwise manner; the balloon and microcatheter were simultaneously withdrawn toward the sigmoid sinus, with Onyx encompassing the entirety of the complex DAVF. The Onyx refluxed into multiple arterial feeders in a distal-to-proximal step-by-step manner, ultimately resulting in an Onyx tunnel. The final angiography study revealed complete obliteration of the DAVF and patency of the TSS. The Onyx tunnel, or reconstructive transvenous balloon-assisted Onyx embolization technique, may be an effective treatment option for large, complex DAVFs of the TSS. This technique may provide another option to facilitate the complete obliteration of the DAVF while preserving the functional sinus.

  9. The development of a pseudo-chamber after balloon pulmonary angioplasty: long-term complications of balloon pulmonary angioplasty.

    PubMed

    Sugiyama, Hisashi; Kise, Hiroaki; Toda, Takako; Hoshiai, Minako

    2016-11-01

    We experienced a rare complication where extravasation developed a pseudo-chamber long after the balloon pulmonary angioplasty for supravalvular pulmonary stenosis. A 3-month-old girl was diagnosed with an anomalous origin of the left coronary artery from the pulmonary artery. She underwent the Takeuchi procedure at 10 months of age. During the follow-up, the supravalvular pulmonary stenosis deteriorated, and was treated by balloon pulmonary angioplasty with the double balloon technique catheter at 6 years of age. Angiography at the main pulmonary artery showed a small amount of extravasation contrast medium after the procedure. Follow-up echocardiography showed a diminished extravasation hemorrhage. Twelve years later, right ventricular enlargement due to pulmonary regurgitation had been observed on echocardiography. In addition, abnormal echo free space was detected at the left posterior of the left atrium. Enhanced computed tomography clearly demonstrated there was an orifice and extent of the pseudo-chamber. Surgical findings revealed a large tear just distal to the coronary tunnel. We speculated that extravasation blood was limited in the perivascular area early after the procedure but eventually reached the non-adhesive oblique pericardial sinus with age. Consequently, pulmonary to oblique pericardial sinus communication was established and looked like a pseudo-chamber long after the procedure. In conclusion, even if extravasation seems to be limited immediately after the balloon pulmonary angioplasty, it could expand for non-adhesive space and could develop a huge blood space like chamber. Long-term careful observation should be necessary for extravasation of pulmonary artery even with surgical adhesion.

  10. Mid-infrared coronary laser angioplasty with multifiber catheters

    NASA Astrophysics Data System (ADS)

    White, Christopher J.; Ramee, Stephen R.; Collins, Tyrone J.

    1993-06-01

    Mid-infrared laser wavelengths offer advantages as a source for coronary angioplasty based upon the excellent fiberoptic transmission and the enhanced tissue absorption of these photons. We report the results of a pilot clinical trial of a Holmium:YAG (2.1 micrometers ) coronary laser angioplasty using a prototype (1.6 mm and 2.0 mm) multifiber catheters. Coronary laser angioplasty with or without adjunctive balloon angioplasty or directional atherectomy was performed in 14 patients with 17 coronary stenoses. Laser success was obtained in 13/14 (93%) patients and 16/17 (94%) lesions. Uncomplicated procedural success was achieved in 9/14 (64%) patients and 12/17 (71%) lesions. Our initial laser success rate was very encouraging using this prototype multifiber catheter with a holmium:YAG laser. However, our overall procedural success rate was disappointing, and not superior to that expected with conventional angioplasty alone. The holmium laser remains an attractive energy source for laser angioplasty, but its utility is limited by catheters which create inadequate channels for stand-alone laser angioplasty.

  11. Segmental dilatation of the intestine.

    PubMed

    Ben Brahim, Mohamed; Belghith, Mohsen; Mekki, Mongi; Jouini, Riadh; Sahnoun, Lassaad; Maazoun, Kaies; Krichene, Imed; Golli, Mondher; Monastiri, Kamel; Nouri, Abdellatif

    2006-06-01

    The aim of this work is to discuss the pathogenesis of the segmental dilatation of the intestine (SDI) and to review its clinical presentation and the ways to confirm the diagnosis. Eight cases of pathologically proven SDI from 1987 to 2003 were reviewed and discussed. There were 7 newborns and a 1-year-old boy. Our patients are 5 boys and 3 girls. In all cases, the diagnosis was not suspected before surgery. Two patients presented with a low neonatal bowel obstruction. Six patients were operated for omphalocele, which was the most frequent associated malformation. The SDI involved the ileum in all patients. The treatment consisted on a resection of the dilated segment with an end-to-end anastomosis. Histological examination demonstrated the presence of ganglion cells in all cases. The muscular layer was hypertrophied in two cases and very thin in one case. A heterotopic gastric mucosa was observed in one case. No anomalies were observed in 5 cases. The postoperative course was uneventful in 6 cases with a mean follow-up of 5 years. Segmental intestinal dilatation is an exceptional pathology with an unknown etiology and a misleading clinical presentation. Several theories were proposed to explain this malformation; however, most authors are rather inclined to an embryological theory incriminating an extrinsic intrauterine intestinal compression. Most cases are neonatal discoveries. The clinical polymorphism and the lack of specificity of radiological investigations explain the difficulties to have a preoperative diagnosis. However, this difficulty is compensated by the favorable evolution after the resection of the dilated segment.

  12. An Endovascular Approach to the Entrapped Central Venous Catheter After Cardiac Surgery

    SciTech Connect

    Desai, Shamit S., E-mail: shamit.desai@northwestern.edu; Konanur, Meghana; Foltz, Gretchen

    PurposeEntrapment of central venous catheters (CVC) at the superior vena cava (SVC) cardiopulmonary bypass cannulation site by closing purse-string sutures is a rare complication of cardiac surgery. Historically, resternotomy has been required for suture release. An endovascular catheter release approach was developed.Materials and MethodsFour cases of CVC tethering against the SVC wall and associated resistance to removal, suggestive of entrapment, were encountered. In each case, catheter removal was achieved using a reverse catheter fluoroscopically guided over the suture fixation point between catheter and SVC wall, followed by the placement of a guidewire through the catheter. The guidewire was snared andmore » externalized to create a through-and-through access with the apex of the loop around the suture. A snare placed from the femoral venous access provided concurrent downward traction on the distal CVC during suture release maneuvers.ResultsIn the initial attempt, gentle traction freed the CVC, which fractured and was removed in two sections. In the subsequent three cases, traction alone did not release the CVC. Therefore, a cutting balloon was introduced over the guidewire and inflated. Gentle back-and-forth motion of the cutting balloon atherotomes successfully incised the suture in all three attempts. No significant postprocedural complications were encountered. During all cases, a cardiovascular surgeon was present in the interventional suite and prepared for emergent resternotomy, if necessary.ConclusionAn endovascular algorithm to the “entrapped CVC” is proposed, which likely reduces risks posed by resternotomy to cardiac surgery patients in the post-operative period.« less

  13. Sheathless guide catheter in transradial percutaneous coronary intervention for ST-segment elevation myocardial infarction.

    PubMed

    Miyasaka, Masaki; Tada, Norio; Kato, Shigeaki; Kami, Masahiro; Horie, Kazunori; Honda, Taku; Takizawa, Kaname; Otomo, Tatsushi; Inoue, Naoto

    2016-05-01

    The aim of this study was to assess the safety and efficacy of sheathless guide catheters in transradial percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI). Transradial PCI for STEMI offers significant clinical benefits, including a reduced incidence of vascular complications. As the size of the radial artery is small, the radial artery is frequently damaged in this procedure using large-bore catheters. A sheathless guide catheter offers a solution to this problem as it does not require an introducer sheath. However, the efficacy and safety of sheathless guide catheters remain to be fully determined in emergent transradial PCI for STEMI. Data on consecutive STEMI patients undergoing primary PCI at the Sendai Kousei Hospital between September 2010 and May 2013 were analyzed. The primary endpoint was the rate of acute procedural success without access site crossover. Secondary endpoints included door-to-balloon time, fluoroscopy time, volume of contrast, and radial artery stenosis or occlusion rate. We conducted transradial PCI for 478 patients with STEMI using a sheathless guide catheter. Acute procedural success was achieved in 466 patients (97.5%). The median door-to-balloon time was 45 min (range, 15-317 min). The median fluoroscopy time was 16.4 min (range, 10-90 min). The median volume of contrast was 134 mL (range, 31-431 mL). Radial stenosis or occlusion developed in 14 (3.8%) of the 370 evaluable patients. This study showed that use of a sheathless guide catheter taking a transradial approach was effective and safe in primary PCI for STEMI. © 2015 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc.

  14. Temporary subclavian steal to reduce intraprocedural embolic risk during detachable balloon occlusion of vertebrobasilar aneurysms: technical note with two case reports.

    PubMed

    Eckard, D A; O'Boynick, P L; Han, P P

    1996-11-01

    Unintentional intracerebral embolization is a serious, ever present threat during neurointerventional procedures. We have devised a method to reduce this intraprocedural risk in vertebral artery interventions by creating a temporary subclavian steal. For this technique, a temporary balloon occlusion catheter is advanced into the proximal subclavian artery via a femoral artery approach, while a second introducer catheter is passed into the target vertebral artery via an axillary artery access. The temporary occluding balloon is then inflated within the proximal subclavian artery, establishing a subclavian steal that diverts blood flow into the arm. Permanent balloon occlusion of the vertebral artery can then be accomplished without fear of intracerebral embolization. Two patients with vertebrobasilar junction aneurysms were successfully treated with detachable balloon embolization using this cerebral protection technique. The permanent occlusion balloons were easily passed through the introducer catheter without difficulty despite reversed vertebral artery flow. No complications were encountered, and the aneurysms were successfully occluded in both patients. Temporary subclavian steal can be easily created to reduce the risk of cerebral embolic complications when performing interventional neuroradiological procedures in the vertebral artery.

  15. Toxicity testing of urinary catheters.

    PubMed

    Talja, M; Andersson, L C; Ruutu, M; Alfthan, O

    1985-10-01

    The tissue toxicity of 23 urinary catheter batches (6 latex and 2 non-latex brands) was tested in vitro and in vivo. In vitro, a human T-cell leukemia line (JM) was cultured in the presence of different concentrations of eluates made from the catheters. The cytotoxicity of the eluates was assessed from their ability to inhibit DNA synthesis measured by incorporation of 3H-thymidine. In vivo, two methods were used. Strips of catheters were implanted into the rabbit dorsal muscle and pieces of catheters were implanted into the rat peritoneal cavity. After four days, the foreign body reaction, type of inflammation and necrosis were quantified macroscopically and by light microscopy. The results of the in vitro cytotoxicity test were correlated with those of in vivo methods. The rat peritoneal implantation test correlated better with the cell culture test (P less than 0.01) than with the rabbit muscle implantation test (P less than 0.05). Based on the clinical experience of urethral stricture complications caused by urinary catheters, catheters yielding eluate which at 30% dilution inhibited 50% DNA synthesis were regarded as toxic. According to this, the rabbit muscle implantation test was not reliable in testing the tissue toxicity of urinary catheters, while the cell culture test was quantitative and seemed to correlate with both the rat peritoneal implantation test and with the clinical complications observed.

  16. High-resolution manometry findings in patients with achalasia and massive dilated megaesophagus.

    PubMed

    Menezes, M A; Andolfi, C; Herbella, F A M; Patti, M G

    2017-05-01

    Achalasia may present in a non-advanced or an advanced (end stage) stage based on the degree of esophageal dilatation. Manometric parameters and esophageal caliber may be prognostic for the outcome of treatment. The correlation between manometry and disease stage has not been yet fully studied. This study aims to describe high-resolution manometry findings in patients with achalasia and massive dilated megaesophagus. Eighteen patients (mean age 61 years, 55% females) with achalasia and massive dilated megaesophagus, as defined by a maximum esophageal dilatation >10 cm at the barium esophagram, were studied. Achalasia was considered secondary to Chagas' disease in 14 (78%) of the patients and idiopathic in the remaining. All patients underwent high-resolution manometry. Upper esophageal sphincter was hypotonic and had impaired relaxation in the majority of patients. Aperistalsis was seen in all patients with an equal distribution of Chicago type I and type II. No type III was noticed. Lower esophageal sphincter did not have a characteristic manometric pattern. In 50% of the cases, the manometry catheter was not able to reach the stomach. Our results did not show a manometric pattern in patients with achalasia and massive dilated esophagus. © The Authors 2017. Published by Oxford University Press on behalf of International Society for Diseases of the Esophagus. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  17. Modeling the pressure-dilatation correlation

    NASA Technical Reports Server (NTRS)

    Sarkar, S.

    1991-01-01

    It is generally accepted that pressure dilatation, which is an additional compressibility term in turbulence transport equations, may be important for high speed flows. Recent direct simulations of homogeneous shear turbulence have given concrete evidence that the pressure dilatation is important insofar that it contributes to the reduced growth of turbulent kinetic energy due to compressibility effects. The problem of modeling pressure dilatation is addressed. A component of the pressure dilatation is isolated which exhibits temporal oscillations and, using direct numerical simulations of homogeneous shear turbulence and isotropic turbulence, show that it has a negligible contribution to the evolution of turbulent kinetic energy. Then, an analysis for the case of homogeneous turbulence is performed to obtain a model for the nonoscillatory pressure dilatation. This model algebraically relates the pressure dilatation to quantities traditionally obtained in incompressible turbulence closures. The model is validated by direct comparison with the pressure dilatation data obtained from the simulations.

  18. Coronary and peripheral stenting in aorto-ostial protruding stents: The balloon assisted access to protruding stent technique.

    PubMed

    Helmy, Tarek A; Sanchez, Carlos E; Bailey, Steven R

    2016-03-01

    Treatment of aorto-ostial in-stent restenosis lesions represents a challenge for interventional cardiologists. Excessive protrusion of the stent into the aorta may lead to multiple technical problems, such as difficult catheter reengagement of the vessel ostium or inability to re-wire through the stent lumen in repeat interventions. We describe a balloon assisted access to protruding stent technique in cases where conventional coaxial engagement of an aorto-ostial protruding stent with the guide catheter or passage of the guide wire through the true lumen is not feasible. This technique is applicable both in coronary and peripheral arteries. © 2015 Wiley Periodicals, Inc.

  19. Balloon Exoplanet Nulling Interferometer (BENI)

    NASA Technical Reports Server (NTRS)

    Lyon, Richard G.; Clampin, Mark; Woodruff, Robert A.; Vasudevan, Gopal; Ford, Holland; Petro, Larry; Herman, Jay; Rinehart, Stephen; Carpenter, Kenneth; Marzouk, Joe

    2009-01-01

    We evaluate the feasibility of using a balloon-borne nulling interferometer to detect and characterize exosolar planets and debris disks. The existing instrument consists of a 3-telescope Fizeau imaging interferometer with 3 fast steering mirrors and 3 delay lines operating at 800 Hz for closed-loop control of wavefront errors and fine pointing. A compact visible nulling interferometer is under development which when coupled to the imaging interferometer would in-principle allow deep suppression of starlight. We have conducted atmospheric simulations of the environment above 100,000 feet and believe balloons are a feasible path forward towards detection and characterization of a limited set of exoplanets and their debris disks. Herein we will discuss the BENI instrument, the balloon environment and the feasibility of such as mission.

  20. Pulmonary vein stenosis following catheter ablation of atrial fibrillation.

    PubMed

    Pürerfellner, Helmut; Martinek, Martin

    2005-11-01

    This review provides an update on the mechanisms, incidence, and current management of significant pulmonary vein stenosis following catheter ablation of atrial fibrillation. Catheter ablation involving the pulmonary veins and the surrounding left atrial tissue is increasingly used to treat atrial fibrillation. In parallel with the fact that these procedures may cure a substantial proportion of patients, severe complications have been observed. Pulmonary vein stenosis is a new clinical entity produced by radiofrequency energy delivery mainly within or at the orifice of the pulmonary veins. The exact incidence is currently unknown because the diagnosis is dependent on the imaging modality and on the rigor with which patients are followed up. The optimal method for screening patients has not been determined. Stenosis of a pulmonary vein may be assessed by combining anatomic and functional imaging using computed tomographic or magnetic resonance imaging, transesophageal echocardiography, and lung scanning. Symptoms vary considerably and may be misdiagnosed, leading to severe clinical consequences. Current treatment strategies involve pulmonary vein dilatation or stenting; however, the restenosis rate remains high. The long-term outcome in patients with pulmonary vein stenosis is unclear. Strategies under development to prevent pulmonary vein stenosis include alternate energy sources and modified ablation techniques. Pulmonary vein stenosis following catheter ablation is a new clinical entity that has been described in various reports recently. There is much uncertainty with respect to causative factors, incidence, diagnosis, and treatment, and long-term sequelae are unclear.

  1. 21 CFR 874.4100 - Epistaxis balloon.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    .... An epistaxis balloon is a device consisting of an inflatable balloon intended to control internal... (general controls). The device is exempt from the premarket notification procedures in subpart E of part...

  2. Status of the NASA Balloon Program

    NASA Technical Reports Server (NTRS)

    Needleman, H. C.; Nock, R. S.; Bawcom, D. W.

    1993-01-01

    The NASA Balloon Program (BP) is examined in an overview of design philosophy, R&D activities, flight testing, and the development of a long-duration balloon for Antarctic use. The Balloon Recovery Program was developed to qualify the use of existing films and to design improved materials and seals. Balloon flights are described for studying the supernova SN1987a, and systems were developed to enhance balloon campaigns including mobile launch vehicles and tracking/data-acquisition systems. The technical approach to long-duration ballooning is reviewed which allows the use of payloads of up to 1350 kg for two to three weeks. The BP is responsible for the development of several candidate polyethylene balloon films as well as design/performance standards for candidate balloons. Specific progress is noted in reliability and in R&D with respect to optimization of structural design, resin blending, and extrusion.

  3. Yellow Balloon in a Briar Patch.

    ERIC Educational Resources Information Center

    Cooper, Frank; Fitzmaurice, Robert W.

    1978-01-01

    As part of a meteorology unit, sixth grade science students launched helium balloons with attached return postcards. This article describes Weather Service monitoring of the balloons and postcard return results. (MA)

  4. Taking the Hot Air Out of Balloons.

    ERIC Educational Resources Information Center

    Brinks, Virgil L.; Brinks, Robyn L.

    1994-01-01

    Describes how a teacher can give their students the challenge of designing and building model balloons or blimps. The project helps students learn the basics of balloon flight and what it really means to be "lighter than air." (PR)

  5. A stress index model for ascending balloons

    NASA Technical Reports Server (NTRS)

    Smith, I. S.

    1986-01-01

    Attention is given to the development on the part of NASA of a simplified stress 'index' model to establish the relative stress magnitudes along a balloon's gore position as a function of altitude. Application of this model to several hundred balloon flights showed a good correlation between balloon failure rate and stress 'index' level. This model can be used during the balloon design process to lower the levels of stress in the balloon. By increasing the wall thickness of the balloon, adding caps, lengthening caps, or using external caps, lower stress can be accomplished. As a result, in January 1985, the NASA Balloon Program established a stress index specification to limit the design and flight stresses for NASA balloons.

  6. The EUSO-Balloon pathfinder

    NASA Astrophysics Data System (ADS)

    Adams, J. H.; Ahmad, S.; Albert, J.-N.; Allard, D.; Anchordoqui, L.; Andreev, V.; Anzalone, A.; Arai, Y.; Asano, K.; Ave Pernas, M.; Baragatti, P.; Barrillon, P.; Batsch, T.; Bayer, J.; Bechini, R.; Belenguer, T.; Bellotti, R.; Belov, K.; Berlind, A. A.; Bertaina, M.; Biermann, P. L.; Biktemerova, S.; Blaksley, C.; Blanc, N.; Błȩcki, J.; Blin-Bondil, S.; Blümer, J.; Bobik, P.; Bogomilov, M.; Bonamente, M.; Briggs, M. S.; Briz, S.; Bruno, A.; Cafagna, F.; Campana, D.; Capdevielle, J.-N.; Caruso, R.; Casolino, M.; Cassardo, C.; Castellinic, G.; Catalano, C.; Catalano, G.; Cellino, A.; Chikawa, M.; Christl, M. J.; Cline, D.; Connaughton, V.; Conti, L.; Cordero, G.; Crawford, H. J.; Cremonini, R.; Csorna, S.; Dagoret-Campagne, S.; de Castro, A. J.; De Donato, C.; de la Taille, C.; De Santis, C.; del Peral, L.; Dell'Oro, A.; De Simone, N.; Di Martino, M.; Distratis, G.; Dulucq, F.; Dupieux, M.; Ebersoldt, A.; Ebisuzaki, T.; Engel, R.; Falk, S.; Fang, K.; Fenu, F.; Fernández-Gómez, I.; Ferrarese, S.; Finco, D.; Flamini, M.; Fornaro, C.; Franceschi, A.; Fujimoto, J.; Fukushima, M.; Galeotti, P.; Garipov, G.; Geary, J.; Gelmini, G.; Giraudo, G.; Gonchar, M.; González Alvarado, C.; Gorodetzky, P.; Guarino, F.; Guzmán, A.; Hachisu, Y.; Harlov, B.; Haungs, A.; Hernández Carretero, J.; Higashide, K.; Ikeda, D.; Ikeda, H.; Inoue, N.; Inoue, S.; Insolia, A.; Isgrò, F.; Itow, Y.; Joven, E.; Judd, E. G.; Jung, A.; Kajino, F.; Kajino, T.; Kaneko, I.; Karadzhov, Y.; Karczmarczyk, J.; Karus, M.; Katahira, K.; Kawai, K.; Kawasaki, Y.; Keilhauer, B.; Khrenov, B. A.; Kim, J.-S.; Kim, S.-W.; Kim, S.-W.; Kleifges, M.; Klimov, P. A.; Kolev, D.; Kreykenbohm, I.; Kudela, K.; Kurihara, Y.; Kusenko, A.; Kuznetsov, E.; Lacombe, M.; Lachaud, C.; Lee, J.; Licandro, J.; Lim, H.; López, F.; Maccarone, M. C.; Mannheim, K.; Maravilla, D.; Marcelli, L.; Marini, A.; Martinez, O.; Masciantonio, G.; Mase, K.; Matev, R.; Medina-Tanco, G.; Mernik, T.; Miyamoto, H.; Miyazaki, Y.; Mizumoto, Y.; Modestino, G.; Monaco, A.; Monnier-Ragaigne, D.; Morales de los Ríos, J. A.; Moretto, C.; Morozenko, V. S.; Mot, B.; Murakami, T.; Murakami, M. Nagano; Nagata, M.; Nagataki, S.; Nakamura, T.; Napolitano, T.; Naumov, D.; Nava, R.; Neronov, A.; Nomoto, K.; Nonaka, T.; Ogawa, T.; Ogio, S.; Ohmori, H.; Olinto, A. V.; Orleański, P.; Osteria, G.; Panasyuk, M. I.; Parizot, E.; Park, I. H.; Park, H. W.; Pastircak, B.; Patzak, T.; Paul, T.; Pennypacker, C.; Perez Cano, S.; Peter, T.; Picozza, P.; Pierog, T.; Piotrowski, L. W.; Piraino, S.; Plebaniak, Z.; Pollini, A.; Prat, P.; Prévôt, G.; Prieto, H.; Putis, M.; Reardon, P.; Reyes, M.; Ricci, M.; Rodríguez, I.; Rodríguez Frías, M. D.; Ronga, F.; Roth, M.; Rothkaehl, H.; Roudil, G.; Rusinov, I.; Rybczyński, M.; Sabau, M. D.; Sáez-Cano, G.; Sagawa, H.; Saito, A.; Sakaki, N.; Sakata, M.; Salazar, H.; Sánchez, S.; Santangelo, A.; Santiago Crúz, L.; Sanz Palomino, M.; Saprykin, O.; Sarazin, F.; Sato, H.; Sato, M.; Schanz, T.; Schieler, H.; Scotti, V.; Segreto, A.; Selmane, S.; Semikoz, D.; Serra, M.; Sharakin, S.; Shibata, T.; Shimizu, H. M.; Shinozaki, K.; Shirahama, T.; Siemieniec-Oziȩbło, G.; Silva López, H. H.; Sledd, J.; Słomińska, K.; Sobey, A.; Sugiyama, T.; Supanitsky, D.; Suzuki, M.; Szabelska, B.; Szabelski, J.; Tajima, F.; Tajima, N.; Tajima, T.; Takahashi, Y.; Takami, H.; Takeda, M.; Takizawa, Y.; Tenzer, C.; Tibolla, O.; Tkachev, L.; Tokuno, H.; Tomida, T.; Tone, N.; Toscano, S.; Trillaud, F.; Tsenov, R.; Tsunesada, Y.; Tsuno, K.; Tymieniecka, T.; Uchihori, Y.; Unger, M.; Vaduvescu, O.; Valdés-Galicia, J. F.; Vallania, P.; Valore, L.; Vankova, G.; Vigorito, C.; Villaseñor, L.; von Ballmoos, P.; Wada, S.; Watanabe, J.; Watanabe, S.; Watts, J.; Weber, M.; Weiler, T. J.; Wibig, T.; Wiencke, L.; Wille, M.; Wilms, J.; Włodarczyk, Z.; Yamamoto, T.; Yamamoto, Y.; Yang, J.; Yano, H.; Yashin, I. V.; Yonetoku, D.; Yoshida, K.; Yoshida, S.; Young, R.; Zotov, M. Yu.; Zuccaro Marchi, A.

    2015-11-01

    EUSO-Balloon is a pathfinder for JEM-EUSO, the Extreme Universe Space Observatory which is to be hosted on-board the International Space Station. As JEM-EUSO is designed to observe Ultra-High Energy Cosmic Rays (UHECR)-induced Extensive Air Showers (EAS) by detecting their ultraviolet light tracks "from above", EUSO-Balloon is a nadir-pointing UV telescope too. With its Fresnel Optics and Photo-Detector Module, the instrument monitors a 50 km2 ground surface area in a wavelength band of 290-430 nm, collecting series of images at a rate of 400,000 frames/sec. The objectives of the balloon demonstrator are threefold: a) perform a full end-to-end test of a JEM-EUSO prototype consisting of all the main subsystems of the space experiment, b) measure the effective terrestrial UV background, with a spatial and temporal resolution relevant for JEM-EUSO. c) detect tracks of ultraviolet light from near space for the first time. The latter is a milestone in the development of UHECR science, paving the way for any future space-based UHECR observatory. On August 25, 2014, EUSO-Balloon was launched from Timmins Stratospheric Balloon Base (Ontario, Canada) by the balloon division of the French Space Agency CNES. From a float altitude of 38 km, the instrument operated during the entire astronomical night, observing UV-light from a variety of ground-covers and from hundreds of simulated EASs, produced by flashers and a laser during a two-hour helicopter under-flight.

  7. Central venous catheter - dressing change

    MedlinePlus

    ... will need: Sterile gloves Cleaning solution A special sponge A special patch, called a Biopatch A clear ... around the catheter. Clean the skin with the sponge and cleaning solution. Air dry after cleaning. Place ...

  8. Large eccentric laser angioplasty catheter

    NASA Astrophysics Data System (ADS)

    Taylor, Kevin D.; Reiser, Christopher

    1997-05-01

    In response to recent demand for increased debulking of large diameter coronary vascular segments, a large eccentric catheter for excimer laser coronary angioplasty has been developed. The outer tip diameter is 2.0 mm and incorporates approximately 300 fibers of 50 micron diameter in a monorail- type percutaneous catheter. The basic function of the device is to ablate a coronary atherosclerotic lesion with 308 nm excimer laser pulses, while passing the tip of the catheter through the lesion. By employing multiple passes through the lesion, rotating the catheter 90 degrees after each pass, we expect to create luminal diameters close to 3 mm with this device. Design characteristics, in-vitro testing, and initial clinical experience is presented.

  9. Endovascular rescue of a fused monorail balloon and cerebral protection device.

    PubMed

    Campbell, John E; Bates, Mark C; Elmore, Michael

    2007-08-01

    To present a case of successful endovascular retrieval of a monorail predilation balloon fused to an embolic protection device (EPD) in the distal internal carotid artery (ICA) of a high-risk symptomatic patient. A 60-year-old man with documented systemic atherosclerotic disease had a severe (>70%) restenosis in the left ICA 3 years after endarterectomy. He was scheduled for carotid artery stenting (CAS) with cerebral protection; however, he developed unstable angina and was transferred to our facility, where the admitting team decided that staged CAS followed by coronary bypass grafting would be the best option. During the CAS procedure, a 6-mm AccuNet filter was passed across the lesion via a 6-F carotid sheath and deployed in the distal ICA without incident. However, the 4-x20-mm predilation monorail balloon was then advanced without visualizing the markers, resulting in inadvertent aggressive interaction that trapped the balloon's tip in the filter. Several maneuvers to separate the devices were unsuccessful. Finally, the filter/balloon combination was moved gently retrograde until the balloon was straddling the subtotal ICA lesion. The lesion was dilated to 4 mm with the balloon, and the sheath was gently advanced across the lesion as the balloon was deflated. Angiography excluded interval occlusion of the filter from the embolic debris during the aforementioned aggressive maneuvers and documented antegrade flow. The filter was slowly withdrawn into the 6-F sheath with simultaneous aspiration. A second 6-mm filter was deployed, and the procedure was completed satisfactorily. The patient did well, with no neurological sequelae. EPDs are an essential in carotid artery stenting and, keeping in mind the potential risks associated with their use, will help the operator avoid complications such as this one.

  10. Antarctic Analog for Dilational Bands on Europa

    NASA Technical Reports Server (NTRS)

    Hurford, T. A.; Brunt, K. M.

    2014-01-01

    Europa's surface shows signs of extension, which is revealed as lithospheric dilation expressed along ridges, dilational bands and ridged bands. Ridges, the most common tectonic feature on Europa, comprise a central crack flanked by two raised banks a few hundred meters high on each side. Together these three classes may represent a continuum of formation. In Tufts' Dilational Model ridge formation is dominated by daily tidal cycling of a crack, which can be superimposed with regional secular dilation. The two sources of dilation can combine to form the various band morphologies observed. New GPS data along a rift on the Ross Ice Shelf, Antarctica is a suitable Earth analog to test the framework of Tufts' Dilational Model. As predicted by Tufts' Dilational Model, tensile failures in the Ross Ice Shelf exhibit secular dilation, upon which a tidal signal can be seen. From this analog we conclude that Tufts' Dilational Model for Europan ridges and bands may be credible and that the secular dilation is most likely from a regional source and not tidally driven.

  11. Scientific Ballooning in India - Recent Developments

    NASA Astrophysics Data System (ADS)

    Manchanda, R. K.; Srinivasan, S.; Subbarao, J. V.

    Established in 1972, the National Balloon Facility operated by TIFR in Hyderabad, India is is a unique facility in the country, which provides a complete solution in scientific ballooning. It is also one of its kind in the world since it combines both, the in-house balloon production and a complete flight support for scientific ballooning. With a large team working through out the year to design, fabricate and launch scientific balloons, the Hyderabad Facility is a unique centre of expertise where the balloon design, Research and Development, the production and launch facilities are located under one roof. Our balloons are manufactured from 100% indigenous components. The mission specific balloon design, high reliability control and support instrumentation, in-house competence in tracking, telemetry, telecommand, data processing, system design and mechanics is a hallmark of the Hyderabad balloon facility. In the past few years we have executed a major programme of upgradation of different components of balloon production, telemetry and telecommand hardware and various support facilities. This paper focuses on our increased capability of balloon production of large sizes up to size of 780,000 M^3 using Antrix film, development of high strength balloon load tapes with the breaking strength of 182 kg, and the recent introduction of S-band telemetry and a commandable timer cut-off unit in the flight hardware. A summary of the various flights conducted in recent years will be presented along with the plans for new facilities.

  12. History and perspectives of scientific ballooning

    NASA Astrophysics Data System (ADS)

    Lefevre, Frank

    2001-08-01

    Prehistory: Robertson, Biot and Gay-Lussac; Glaisher and the first studies of the atmosphere; Flammarion. The rebirth of scientific ballooning: polyethylene and mylar vehicles at Minneapolis. Super-pressurized balloons. The CNES and the Nasa programs; meteorology, aeronomy and astronomy, The Eole program. The Venus and Mars balloons in the French-Soviet space program. The future.

  13. A successful retrograde re-entry at aorta using the Outback LTD catheter for a bilateral common iliac artery occlusion.

    PubMed

    Kim, Tae-Hoon; Ahn, Ji-Hun; Kim, Do-Hoi

    2013-05-01

    The Outback LTD re-entry catheter system has become a valuable tool for peripheral intervention and it has been widely used for variable peripheral chronic total occlusion (CTO). However, its use in the setting of the aorta was restricted because of concerns of bleeding risks resulting from re-entry puncture or ballooning. This report presents a case of successful re-entry using the Outback LTD Re-Entry Catheter (Cordis, Bridgewater, New Jersy) at the aorta in a patient with bilateral common iliac artery occlusion. Copyright © 2012 Wiley Periodicals, Inc.

  14. Prophylactic Hypogastric Artery Ballooning in a Patient with Complete Placenta Previa and Increta

    PubMed Central

    Yi, Kyong Wook; Seo, Tae-Seok; So, Kyeong A; Paek, Yu Chin; Kim, Hai-Joong

    2010-01-01

    Abnormal attachment of the placenta (Placenta accreta, increta, and percreta) is an uncommon but potentially lethal cause of maternal mortality from massive postpartum hemorrhage. A 33-yr-old woman, who had been diagnosed with a placenta previa, was referred at 30 weeks gestation. On ultrasound, a complete type of placenta previa and multiple intraplacental lacunae, suggestive of placenta accreta, were noted. For further evaluation of the placenta, pelvis MRI was performed and revealed findings suspicious of a placenta increta. An elective cesarean delivery and subsequent hysterectomy were planned for the patient at 38 weeks gestation. On the day of delivery, endovascular catheters for balloon occlusion were placed within the hypogastric arteries, prior to the cesarean section. In the operating room, immediately after the delivery of the baby, bilateral hypogastric arteries were occluded by inflation of the balloons in the catheters previously placed within. With the placenta retained within the uterus, a total hysterectomy was performed in the usual fashion. The occluding balloons were deflated after closure of the vaginal cuff with hemostasis. The patient had stable vital signs and normal laboratory findings during the recovery period; she was discharged six days after delivery without complications. The final pathology confirmed a placenta increta. PMID:20358016

  15. Global electrodynamics from superpressure balloons

    NASA Technical Reports Server (NTRS)

    Holzworth, R. H.; Hu, H.

    1995-01-01

    Electric field and conductivity measurements in the stratosphere between November 1992 and March 1993 have been made using superpressure balloons in the southern hemisphere. Over 400 payload-days of data have been made during a record setting experiment called ELBBO (Extended Life Balloon Borne Observatories). This experiment resulted in 4 flights aloft simultaneously for over 2 months including one flight which lasted over 4 months. Electrodynamical coupling between the atmosphere and ionosphere is studied using the measured electric fields, and a simple empirical model of the stratospheric conductivity. Altitude profiles of conductivity have been obtained from several superpressure balloon flights using the large end-of-flight altitude swings on the last few days of each flight (as the balloon begins to loose superpressure). Coupling between the fields and atmospheric inertial waves has been observed. Effects and dynamics of the global circuit suggest that standard models are missing significant phenomena. Large scale ionospheric convection activity has been studied from the polar cap to the middle latitudes. Cusp latitude fields have been continuously measured for many days in a row.

  16. Meteorological Support in Scientific Ballooning

    NASA Technical Reports Server (NTRS)

    Schwantes, Chris; Mullenax, Robert

    2016-01-01

    The weather affects every portion of a scientific balloon mission, from payload integration to launch, float, and impact and recovery. Forecasting for these missions is very specialized and unique in many aspects. CSBF Meteorology incorporates data from NWSNCEP, as well as several international meteorological organizations, and NCAR. This presentation will detail the tools used and specifics on how CSBF Meteorology produces its forecasts.

  17. Meteorological Support in Scientific Ballooning

    NASA Technical Reports Server (NTRS)

    Schwantes, Chris; Mullenax, Robert

    2017-01-01

    The weather affects every portion of a scientific balloon mission, from payload integration to launch, float, and impact and recovery. Forecasting for these missions is very specialized and unique in many aspects. CSBF Meteorology incorporates data from NWSNCEP, as well as several international meteorological organizations, and NCAR. This presentation will detail the tools used and specifics on how CSBF Meteorology produces its forecasts.

  18. NASA Scientific Balloon in Antarctica

    NASA Image and Video Library

    2017-12-08

    NASA image captured December 25, 2011 A NASA scientific balloon awaits launch in McMurdo, Antarctica. The balloon, carrying Indiana University's Cosmic Ray Electron Synchrotron Telescope (CREST), was launched on December 25. After a circum-navigational flight around the South Pole, the payload landed on January 5. The CREST payload is one of two scheduled as part of this seasons' annual NASA Antarctic balloon Campaign which is conducted in cooperation with the National Science Foundation's Office of Polar Programs. The campaign's second payload is the University of Arizona's Stratospheric Terahertz Observatory (STO). You can follow the flights at the Columbia Scientific Balloon Facility's web site at www.csbf.nasa.gov/antarctica/ice.htm Credit: NASA NASA image use policy. NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on Twitter Like us on Facebook Find us on Instagram

  19. Simulating clefts in pumpkin balloons

    NASA Astrophysics Data System (ADS)

    Baginski, Frank; Brakke, Kenneth

    2010-02-01

    The geometry of a large axisymmetric balloon with positive differential pressure, such as a sphere, leads to very high film stresses. These stresses can be significantly reduced by using a tendon re-enforced lobed pumpkin-like shape. A number of schemes have been proposed to achieve a cyclically symmetric pumpkin shape, including the constant bulge angle (CBA) design, the constant bulge radius (CBR) design, CBA/CBR hybrids, and NASA’s recent constant stress (CS) design. Utilizing a hybrid CBA/CBR pumpkin design, Flight 555-NT in June 2006 formed an S-cleft and was unable to fully deploy. In order to better understand the S-cleft phenomenon, a series of inflation tests involving four 27-m diameter 200-gore pumpkin balloons were conducted in 2007. One of the test vehicles was a 1/3-scale mockup of the Flight 555-NT balloon. Using an inflation procedure intended to mimic ascent, the 1/3-scale mockup developed an S-cleft feature strikingly similar to the one observed in Flight 555-NT. Our analysis of the 1/3-scale mockup found it to be unstable. We compute asymmetric equilibrium configurations of this balloon, including shapes with an S-cleft feature.

  20. Long-term outcome of 154 patients receiving balloon-occluded retrograde transvenous obliteration for gastric fundal varices.

    PubMed

    Imai, Yukinori; Nakazawa, Manabu; Ando, Satsuki; Sugawara, Kayoko; Mochida, Satoshi

    2016-11-01

    This study aims to clarify the long-term outcome of therapeutic strategies including balloon-occluded retrograde transvenous obliteration (B-RTO) for patients with gastric fundal varices. The subjects were 154 patients with gastric fundal varices fulfilling the criteria for receiving B-RTO. In patients showing variceal bleeding, endoscopic therapies and/or balloon tamponade was performed to achieve hemostasis. B-RTO was accomplished with injection of 5% ethanolamine oleate through a standard balloon catheter except for patients with atypical varices, in whom a microballoon catheter was used to occlude drainage vessels other than a gastrorenal shunt. In patients complicated with esophageal varices at baseline, endoscopic therapies were performed following B-RTO. Balloon-occluded retrograde transvenous obliteration was performed successfully in 147 patients (95%), including 15 patients using a microballoon catheter. Complete variceal obliteration was achieved in all patients. Additional endoscopic therapies for esophageal varices were performed in 31 patients. Gastric varices did not recur in any of these patients. The cumulative survival rates at 1, 3, and 5 years after B-RTO were 91%, 76%, and 72%, respectively. Child-Pugh scores and hepatocellular carcinoma complication were identified as prognostic factors associated with survival rates. The cumulative exacerbation rates of esophageal varices at 1, 3, and 5 years were 13%, 20%, and 27%, respectively, and rupture developed in six patients, which were successfully treated with endoscopic therapies. Therapeutic strategies including B-RTO with a microballoon catheter were useful to achieve a favorable outcome in patients with gastric fundal varices especially in those manifesting Child-Pugh class-A liver damage and/or those without hepatocellular carcinoma complication. © 2016 Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.

  1. [Development and evaluation of a prosthetic valved conduit dilated by percutaneous approach: experimental study in the lamb].

    PubMed

    Boudjemline, Y; Laborde, F; Pineau, E; Mollet, A; Abadir, S; Bonhoeffer, P; Bonnet, D; Sidi, D

    2006-05-01

    This study was undertaken to develop a dilated valved conduit for reconstruction of the right ventricular outflow tract in the animal. The conduits were made by sewing a valved tube (Medtronic Inc) inside a vascular stent (Numed Inc). After preparation, they were inserted surgically in five lambs. The conduits were then dilated 6 weeks and 3 months after their implantation. Before sacrificing the animals at 3 months, a 22 mm valved stent was implanted percutaneously inside the surgical conduits. One animal died suddenly due to kinking of the conduit. Balloon dilatation was performed in the surviving animals. The first dilatation only had a modest impact on valvular function but it was much aggravated after the second dilatation. A valved stent was successfully inserted percutaneously. At sacrifice, all the conduits were completely engulfed in an intense fibrosis. In conclusion, a valved biological conduit for reconstruction of the right ventricular ejection tract has been developed and can be dilated sequentially to follow growth. The new product could have an important role to play in the management of congenital malformations involving the right ventricular outflow tract.

  2. Effect of the positioning of a balloon valve in the aorta on coronary flow during aortic regurgitation.

    PubMed

    Antonatos, P G; Anthopoulos, L P; Kandyla, D D; Karras, A D; Moulopoulos, S D

    1984-07-01

    The coronary artery flow changes relative to the function of a catheter-mounted balloon valve used for relief of aortic regurgitation were studied in 10 mongrel dogs. Acute aortic regurgitation was produced by severing the aortic cusps with a long needle. Coronary flow was recorded from the left anterior descending coronary artery through an electromagnetic flowmeter. When the balloon was functioning within the cavity of the left ventricle there were no significant changes in the coronary flow and aortic pressure, except for a slight decrease in the aortic end-diastolic pressure. When it was functioning in the aortic ring the coronary flow increased 6.52 +/- 1.65 ml/min/100 gm of myocardium (p less than 0.001) and became predominantly diastolic. When it was functioning in the ascending aorta the coronary flow decreased 6.22 +/- 1.16 ml/min/100 gm of myocardium (p less than 0.001) and remained predominantly systolic. Finally, when the balloon was functioning in the thoracic aorta the coronary flow did not change significantly. With the balloon functioning in the aortic ring, ascending aorta, or thoracic aorta, there was a significant increase in the aortic end-diastolic pressure and decrease in the pulse pressure distal to the location of the balloon. It is concluded that the location of the balloon valve inserted for relief of aortic regurgitation influences the effect on coronary arterial flow.

  3. Use of the Ascent balloon for a 2-in-1 remodeling technique: feasibility and initial experience: case report.

    PubMed

    Clarençon, Frédéric; Pérot, Guillaume; Biondi, Alessandra; Di Maria, Federico; Szatmary, Zoltan; Chiras, Jacques; Sourour, Nader

    2012-03-01

    To present the feasibility of using the Ascent balloon, a new double-lumen remodeling balloon, for a new 2-in-1 technique allowing coiling through the lumen of the balloon without the use of an additional coiling microcatheter. Remodeling technique had enlarged the indications for endovascular treatment of intracranial aneurysm. Nevertheless, one of the limitations of this technique is that it requires using 2 devices in the same parent artery. A 55-year-old woman presented with a 7.7 × 4.5-mm incidental anterior communicating artery aneurysm. Only 1 A1 segment (left side) was patent on the cerebral angiogram. A 6F Fargo Max guiding catheter was positioned in the left petrous internal carotid artery. The Ascent balloon was placed in front of the neck of the aneurysm after navigation on a Traxcess 0.014-in guidewire. Coiling of the aneurysm sac was performed via 1 lumen of the device under iterative inflations of the balloon through the second lumen. This new 2-in-1 technique using a sole remodeling balloon without an additional coiling microcatheter is very promising, especially in cases of a small-caliber parent artery.

  4. Vascular occlusion with a balloon-expandable stent occluder.

    PubMed

    Moss, J G; Laborde, J C; Clem, M C; Rivera, F J; Encarnacion, C E; Meyer, K B; Palmaz, J C

    1994-05-01

    To evaluate the effectiveness of a new vascular occlusion device. The device was created by coating a balloon-expandable stent with a silicone sleeve that tapers to a blind-ended nozzle at its leading end. Once crimp-mounted on an angioplasty balloon catheter, the device is introduced over a guide wire through a small end hole in the nozzle. The device was tested for stability and occlusive ability. No migration was measured over a pulsatile pulse range of 50-300 mm Hg, and mean flow rate in the occluded vessel was reduced from 443 mL/min +/- 99 (standard deviation) to 1.9 mL/min +/- 2.7. Subsequently, 12 arteries were occluded in three dogs, and immediate vascular occlusion was achieved in all vessels. An arteriovenous fistula was created in another six dogs and was successfully occluded with the device. Follow-up arteriography at 3 months demonstrated persistent occlusion with no migration of the device. This new occlusive device offers immediate vascular occlusion with excellent stability.

  5. Percutaneous dilational tracheotomy for airway management in a newborn with Pierre-Robin syndrome and a glossopharyngeal web.

    PubMed

    Pirat, Arash; Candan, Selim; Unlükaplan, Aytekin; Kömürcü, Ozgür; Kuşlu, Selim; Arslan, Gülnaz

    2012-04-01

    Pierre-Robin syndrome (PRS) is often associated with difficulty in endotracheal intubation. We present the use of percutaneous dilational tracheotomy (PDT) for airway management of a newborn with PRS and a glossopharyngeal web. A 2-day-old term newborn with PRS and severe obstructive dyspnea was evaluated by the anesthesiology team for airway management. A direct laryngoscopy revealed a glossopharyngeal web extending from the base of the tongue to the posterior pharyngeal wall. The infant was spontaneously breathing through a 2 mm diameter fistula in the center of this web. It was decided that endotracheal intubation was impossible, and a PDT was planned. The trachea of the newborn was cannulated, using a 20 gauge peripheral venous catheter and a 0.71 mm guide wire was introduced through this catheter. Using 5 French, 7 French, 9 French, and 11 French central venous catheter kit dilators, staged tracheotomy stoma dilation was performed. By inserting a size 3.0 tracheotomy cannula, PDT was successfully completed in this newborn. This case describes the successful use of PDT for emergency airway management of a newborn with PRS and glossopharyngeal web.

  6. Dextran sulfate as a drug delivery platform for drug‐coated balloons: Preparation, characterization, in vitro drug elution, and smooth muscle cell response

    PubMed Central

    Lamichhane, Sujan; Anderson, Jordan; Remund, Tyler; Kelly, Patrick

    2015-01-01

    Abstract Drug‐coated balloons (DCBs) have now emerged as a promising approach to treat peripheral artery disease. However, a significant amount of drug from the balloon surface is lost during balloon tracking and results in delivering only a subtherapeutic dose of drug at the diseased site. Hence, in this study, the use of dextran sulfate (DS) polymer was investigated as a platform to control the drug release from balloons. An antiproliferative drug, paclitaxel (PAT), was incorporated into DS films (PAT‐DS). The characterizations using SEM, FT‐IR, and DSC showed that the films prepared were smooth and homogenous with PAT molecularly dispersed in the bulk of DS matrix in amorphous form. An investigation on the interaction of smooth muscle cells (SMCs) with control‐DS and PAT‐DS films showed that both films inhibited SMC growth, with a superior inhibitory effect observed for PAT‐DS films. PAT‐DS coatings were then produced on balloon catheters. The integrity of coatings was well‐maintained when the balloons were either deflated or inflated. In this study, up to 2.2 µg/mm2 of PAT was loaded on the balloons using the DS platform. Drug elution studies showed that only 10 to 20% of the total PAT loaded was released from the PAT‐DS coated balloons during the typical time period of balloon tracking (1 min) and then ∼80% of the total PAT loaded was released during the typical time period of balloon inflation and treatment (from 1 min to 4 min). Thus, this study demonstrated the use of DS as a platform to control drug delivery from balloons. © 2015 The Authors Journal of Biomedical Materials Research Part B: Applied Biomaterials Published by Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1416–1430, 2016. PMID:26227252

  7. Compensation for Unconstrained Catheter Shaft Motion in Cardiac Catheters

    PubMed Central

    Degirmenci, Alperen; Loschak, Paul M.; Tschabrunn, Cory M.; Anter, Elad; Howe, Robert D.

    2016-01-01

    Cardiac catheterization with ultrasound (US) imaging catheters provides real time US imaging from within the heart, but manually navigating a four degree of freedom (DOF) imaging catheter is difficult and requires extensive training. Existing work has demonstrated robotic catheter steering in constrained bench top environments. Closed-loop control in an unconstrained setting, such as patient vasculature, remains a significant challenge due to friction, backlash, and physiological disturbances. In this paper we present a new method for closed-loop control of the catheter tip that can accurately and robustly steer 4-DOF cardiac catheters and other flexible manipulators despite these effects. The performance of the system is demonstrated in a vasculature phantom and an in vivo porcine animal model. During bench top studies the robotic system converged to the desired US imager pose with sub-millimeter and sub-degree-level accuracy. During animal trials the system achieved 2.0 mm and 0.65° accuracy. Accurate and robust robotic navigation of flexible manipulators will enable enhanced visualization and treatment during procedures. PMID:27525170

  8. Status of the NASA Balloon Program

    NASA Astrophysics Data System (ADS)

    Needleman, H. C.; Nock, R. S.; Bawcom, D. W.

    1993-02-01

    In the early 1980's the U.S. National Aeronautics and Space Administration (NASA) Balloon Program was faced with a problem of catastrophic balloon failures. In 1986 a balloon recovery program was initiated. This program included qualification of new balloon films, and investigations into materials, processing, structures and performance of balloons. This recovery program has been very successful. To date, more than 100 balloons manufactured of newly developed films have been flown with unprecedented success. There has been much progress made across the spectrum of balloon related disciplines. A new design philosophy has been developed and is being used for all NASA balloons. An updated balloon reliability and quality assurance program is in effect. The long duration balloon development project has been initiated with the first flight test having been conducted in December 1989 from Antarctica. A comprehensive research and development (R&D) effort has been initiated and is progressing well. The progress, status and future plans for these and other aspects of the NASA program, along with a description of the comprehensive balloon R&D activity, will be presented.

  9. Scientific ballooning in India Recent developments

    NASA Astrophysics Data System (ADS)

    Manchanda, R. K.

    Established in 1971, the National Balloon Facility operated by TIFR in Hyderabad, India, is a unique facility in the country, which provides a complete solution in scientific ballooning. It is also one of its kind in the world since it combines both, the in-house balloon production and a complete flight support for scientific ballooning. With a large team working through out the year to design, fabricate and launch scientific balloons, the Hyderabad Facility is a unique centre of expertise where the balloon design, research and development, the production and launch facilities are located under one roof. Our balloons are manufactured from 100% indigenous components. The mission specific balloon design, high reliability control and support instrumentation, in-house competence in tracking, telemetry, telecommand, data processing, system design and mechanics is its hallmark. In the past few years, we have executed a major programme of upgradation of different components of balloon production, telemetry and telecommand hardware and various support facilities. This paper focuses on our increased capability of balloon production of large sizes up to 780,000 m 3 using Antrix film, development of high strength balloon load tapes with the breaking strength of 182 kg, and the recent introduction of S-band telemetry and a commandable timer cut-off unit in the flight hardware. A summary of the various flights conducted in recent years will be presented along with the plans for new facilities.

  10. Histological and morphometric analyses for rat carotid balloon injury model.

    PubMed

    Tulis, David A

    2007-01-01

    Experiments aimed at analyzing the response of blood vessels to mechanical injury and ensuing remodeling responses often employ the highly characterized carotid artery balloon injury model in laboratory rats. This approach utilizes luminal insertion of a balloon embolectomy catheter into the common carotid artery with inflation and withdrawal resulting in an injury characterized by vascular endothelial cell (EC) denudation and medial wall distension. The adaptive response to this injury is typified by robust vascular smooth muscle cell (SMC) replication and migration, SMC apoptosis and necrosis, enhanced synthesis and deposition of extracellular matrix (ECM) components, partial vascular EC regeneration from the border zones, luminal narrowing, and establishment of a neointima in time-dependent fashion. Evaluation of these adaptive responses to blood vessel injury can include acute and longer term qualitative and quantitative measures including expression analyses, activity assays, immunostaining for a plethora of factors and signals, and morphometry of neointima formation and gross mural remodeling. This chapter presents a logical continuation of Chapter 1 that offers details for performing the rat carotid artery balloon injury model in a standard laboratory setting by providing commonly used protocols for performing histological and morphometric analyses in such studies. Moreover, procedures, caveats, and considerations included in this chapter are highly relevant for alternative animal vascular physiology/pathophysiology studies and in particular those related to mechanisms of vascular injury and repair. Included in this chapter are specifics for in situ perfusion-fixation, tissue harvesting and processing for both snap-frozen and paraffin-embedded protocols, specimen embedding and sectioning, slide preparation, several standard histological staining steps, and routine morphological assessment.

  11. Acute stent recoil and optimal balloon inflation strategy: an experimental study using real-time optical coherence tomography.

    PubMed

    Kitahara, Hideki; Waseda, Katsuhisa; Yamada, Ryotaro; Otagiri, Kyuhachi; Tanaka, Shigemitsu; Kobayashi, Yuhei; Okada, Kozo; Kume, Teruyoshi; Nakagawa, Kaori; Teramoto, Tomohiko; Ikeno, Fumiaki; Yock, Paul G; Fitzgerald, Peter J; Honda, Yasuhiro

    2016-06-12

    Our aim was to evaluate stent expansion and acute recoil at deployment and post-dilatation, and the impact of post-dilatation strategies on final stent dimensions. Optical coherence tomography (OCT) was performed on eight bare metal platforms of drug-eluting stents (3.0 mm diameter, n=6 for each) during and after balloon inflation in a silicone mock vessel. After nominal-pressure deployment, a single long (30 sec) vs. multiple short (10 sec x3) post-dilatations were performed using a non-compliant balloon (3.25 mm, 20 atm). Stent areas during deployment with original delivery systems were smaller in stainless steel stents than in cobalt-chromium and platinum-chromium stents (p<0.001), whereas subsequent acute recoil was comparable among the three materials. At post-dilatation, acute recoil was greater in cobalt-chromium and platinum-chromium stents than in stainless steel stents (p<0.001), resulting in smaller final stent areas in cobalt-chromium and platinum-chromium stents than in stainless steel stents (p<0.001). In comparison between conventional and latest-generation cobalt-chromium stents, stent areas were not significantly different after both deployment and post-dilatation. With multiple short post-dilatations, acute recoil was significantly improved from first to third short inflation (p<0.001), achieving larger final area than a single long inflation, despite stent materials/designs (p<0.001). Real-time OCT revealed significant acute recoil in all stent types. Both stent materials/designs and post-dilatation strategies showed a significant impact on final stent expansion.

  12. Missed signs of autonomic dysreflexia in a tetraplegic patient after incorrect placement of urethral Foley catheter: a case report.

    PubMed

    Vaidyanathan, Subramanian; Soni, Bakul M; Oo, Tun; Hughes, Peter L; Singh, Gurpreet

    2014-01-01

    Autonomic dysreflexia is poorly recognised outside of spinal cord injury centres, and may result in adverse outcomes including mortality from delayed diagnosis and treatment. We present a spinal cord injury patient, who developed autonomic dysreflexia following incorrect placement of urethral Foley catheter. Health professionals failed to recognise signs and symptoms of autonomic dysreflexia as well as its significance in this tetraplegic patient. A tetraplegic patient started sweating profusely following insertion of a Foley catheter per urethra. The catheter was draining urine; there was no bypassing, no bleeding per urethra, and no haematuria. Patient's wife, who had been looking after her tetraplegic husband for more than forty years, told the health professionals that the catheter might have been placed incorrectly but her concerns were ignored. Ultrasound scan of urinary tract revealed no urinary calculi, no hydronephrosis. The balloon of Foley catheter was not seen in urinary bladder but this finding was not recognised by radiologist and spinal cord physician. Patient continued to sweat profusely; therefore, CT of pelvis was performed, but there was a delay of ten days. CT revealed the balloon of Foley catheter in the over-stretched prostate-membranous urethra; the tip of catheter was not located within the urinary bladder but was lying distal to bladder neck. Flexible cystoscopy was performed and Foley catheter was inserted into the bladder over a guide wire. The intensity of sweating decreased; noxious stimuli arising from traumatised urethra might take a long while to settle. Inserting a catheter in a tetraplegic patient should be carried out by a senior health professional, who is familiar with spasm of bladder neck which occurs frequently in tetraplegic patients. Facilities for urgent CT scan should be available to check the position of Foley catheter in spinal cord injury patients when a patient manifests signs and symptoms of autonomic dysreflexia

  13. Intracavitary moderator balloon combined with (252)Cf brachytherapy and boron neutron capture therapy, improving dosimetry in brain tumour and infiltrations.

    PubMed

    Brandão, S F; Campos, T P R

    2015-07-01

    This article proposes a combination of californium-252 ((252)Cf) brachytherapy, boron neutron capture therapy (BNCT) and an intracavitary moderator balloon catheter applied to brain tumour and infiltrations. Dosimetric evaluations were performed on three protocol set-ups: (252)Cf brachytherapy combined with BNCT (Cf-BNCT); Cf-BNCT with a balloon catheter filled with light water (LWB) and the same set-up with heavy water (HWB). Cf-BNCT-HWB has presented dosimetric advantages to Cf-BNCT-LWB and Cf-BNCT in infiltrations at 2.0-5.0 cm from the balloon surface. However, Cf-BNCT-LWB has shown superior dosimetry up to 2.0 cm from the balloon surface. Cf-BNCT-HWB and Cf-BNCT-LWB protocols provide a selective dose distribution for brain tumour and infiltrations, mainly further from the (252)Cf source, sparing the normal brain tissue. Malignant brain tumours grow rapidly and often spread to adjacent brain tissues, leading to death. Improvements in brain radiation protocols have been continuously achieved; however, brain tumour recurrence is observed in most cases. Cf-BNCT-LWB and Cf-BNCT-HWB represent new modalities for selectively combating brain tumour infiltrations and metastasis.

  14. Intracavitary moderator balloon combined with 252Cf brachytherapy and boron neutron capture therapy, improving dosimetry in brain tumour and infiltrations

    PubMed Central

    Brandão, S F

    2015-01-01

    Objective: This article proposes a combination of californium-252 (252Cf) brachytherapy, boron neutron capture therapy (BNCT) and an intracavitary moderator balloon catheter applied to brain tumour and infiltrations. Methods: Dosimetric evaluations were performed on three protocol set-ups: 252Cf brachytherapy combined with BNCT (Cf-BNCT); Cf-BNCT with a balloon catheter filled with light water (LWB) and the same set-up with heavy water (HWB). Results: Cf-BNCT-HWB has presented dosimetric advantages to Cf-BNCT-LWB and Cf-BNCT in infiltrations at 2.0–5.0 cm from the balloon surface. However, Cf-BNCT-LWB has shown superior dosimetry up to 2.0 cm from the balloon surface. Conclusion: Cf-BNCT-HWB and Cf-BNCT-LWB protocols provide a selective dose distribution for brain tumour and infiltrations, mainly further from the 252Cf source, sparing the normal brain tissue. Advances in knowledge: Malignant brain tumours grow rapidly and often spread to adjacent brain tissues, leading to death. Improvements in brain radiation protocols have been continuously achieved; however, brain tumour recurrence is observed in most cases. Cf-BNCT-LWB and Cf-BNCT-HWB represent new modalities for selectively combating brain tumour infiltrations and metastasis. PMID:25927876

  15. Design of a cost-effective, hemodynamically adjustable model for resuscitative endovascular balloon occlusion of the aorta (REBOA) simulation.

    PubMed

    Keller, Benjamin A; Salcedo, Edgardo S; Williams, Timothy K; Neff, Lucas P; Carden, Anthony J; Li, Yiran; Gotlib, Oren; Tran, Nam K; Galante, Joseph M

    2016-09-01

    Resuscitative endovascular balloon occlusion of the aorta (REBOA) is an adjunct technique for salvaging patients with noncompressible torso hemorrhage. Current REBOA training paradigms require large animals, virtual reality simulators, or human cadavers for acquisition of skills. These training strategies are expensive and resource intensive, which may prevent widespread dissemination of REBOA. We have developed a low-cost, near-physiologic, pulsatile REBOA simulator by connecting an anatomic vascular circuit constructed out of latex and polyvinyl chloride tubing to a commercially available pump. This pulsatile simulator is capable of generating cardiac outputs ranging from 1.7 to 6.8 L/min with corresponding arterial blood pressures of 54 to 226/14 to 121 mmHg. The simulator accommodates a 12 French introducer sheath and a CODA balloon catheter. Upon balloon inflation, the arterial waveform distal to the occlusion flattens, distal pulsation within the simulator is lost, and systolic blood pressures proximal to the balloon catheter increase by up to 62 mmHg. Further development and validation of this simulator will allow for refinement, reduction, and replacement of large animal models, costly virtual reality simulators, and perfused cadavers for training purposes. This will ultimately facilitate the low-cost, high-fidelity REBOA simulation needed for the widespread dissemination of this life-saving technique.

  16. Management of Bartholin's cyst and abscess using the Word catheter: implementation, recurrence rates and costs.

    PubMed

    Reif, Philipp; Ulrich, Daniela; Bjelic-Radisic, Vesna; Häusler, Martin; Schnedl-Lamprecht, Elke; Tamussino, Karl

    2015-07-01

    Bartholin's cysts and abscesses occur in about 2% of women. None of the surgical or conservative treatment approaches have been proven to be superior. The Word catheter is an outpatient treatment option, but little is known about aspects of implementing this therapy in an office setting. The present study's focus is on recurrence rates and organizational requirements of implementing outpatient treatment of Bartholin's cyst and abscess and compares costs of Word catheter treatment and marsupialization. Between March 2013 and May 2014 30 women were included in the study. We measured time consumed for treatment and follow-up and analyzed costs using the Word catheter and marsupialization under general anesthesia. We also assessed the ease of use of the Word catheter for application and removal using a standardized visual analog scale (VAS 1-10). Word catheter treatment was successful in 26/30 cases (87%). Balloon loss before the end of the 4-week treatment period occurred in 11/26 cases with a mean residence time of 19.1 (±10.0) days. None of the patients with early catheter loss developed recurrent cyst or abscess. Recurrence occurred in 1/26 cases (3.8%). Difficulty-score of application was 2 [1-10] and of removal 1 [1], respectively. Costs were € 216 for the treatment in the clinic as compared with € 1584/€ 1282 for surgical marsupialization with a one-night stay or daycare clinic, respectively. The present study indicates that the Word catheter is an easy to handle, low cost outpatient procedure with acceptable short-term recurrence rates. Treatment costs are seven times lower than for marsupialization. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  17. Fibrin Sheath Angioplasty: A Technique to Prevent Superior Vena Cava Stenosis Secondary to Dialysis Catheters

    PubMed Central

    Hacker, Robert I.; Garcia, Lorena De Marco; Chawla, Ankur; Panetta, Thomas F.

    2012-01-01

    Fibrin sheaths are a heterogeneous matrix of cells and debris that form around catheters and are a known cause of central venous stenosis and catheter failure. A total of 50 cases of central venous catheter fibrin sheath angioplasty (FSA) after catheter removal or exchange are presented. A retrospective review of an outpatient office database identified 70 eligible patients over a 19-month period. After informed consent was obtained, the dialysis catheter exiting the skin was clamped, amputated, and a wire was inserted. The catheter was then removed and a 9-French sheath was inserted into the superior vena cava, a venogram was performed. If a fibrin sheath was present, angioplasty was performed using an 8 × 4 or 10 × 4 balloon along the entire length of the fibrin sheath. A completion venogram was performed to document obliteration of the sheath. During the study, 50 patients were diagnosed with a fibrin sheath, and 43 had no pre-existing central venous stenosis. After FSA, 39 of the 43 patient's (91%) central systems remained patent without the need for subsequent interventions; 3 patients (7%) developed subclavian stenoses requiring repeat angioplasty and stenting; 1 patent (2.3%) developed an occlusion requiring a reintervention. Seven patients with prior central stenosis required multiple angioplasties; five required stenting of their central lesions. Every patient had follow-up fistulograms to document long-term patency. We propose that FSA is a prudent and safe procedure that may help reduce the risk of central venous stenosis from fibrin sheaths due to central venous catheters. PMID:23997555

  18. Infraclavicular versus axillary nerve catheters: A retrospective comparison of early catheter failure rate.

    PubMed

    Quast, Michaela B; Sviggum, Hans P; Hanson, Andrew C; Stoike, David E; Martin, David P; Niesen, Adam D

    2018-05-01

    Continuous brachial plexus catheters are often used to decrease pain following elbow surgery. This investigation aimed to assess the rate of early failure of infraclavicular (IC) and axillary (AX) nerve catheters following elbow surgery. Retrospective study. Postoperative recovery unit and inpatient hospital floor. 328 patients who received IC or AX nerve catheters and underwent elbow surgery were identified by retrospective query of our institution's database. Data collected included unplanned catheter dislodgement, catheter replacement rate, postoperative pain scores, and opioid administration on postoperative day 1. Catheter failure was defined as unplanned dislodging within 24 h of placement or requirement for catheter replacement and evaluated using a covariate adjusted model. 119 IC catheters and 209 AX catheters were evaluated. There were 8 (6.7%) failed IC catheters versus 13 (6.2%) failed AX catheters. After adjusting for age, BMI, and gender there was no difference in catheter failure rate between IC and AX nerve catheters (p = 0.449). These results suggest that IC and AX nerve catheters do not differ in the rate of early catheter failure, despite differences in anatomic location and catheter placement techniques. Both techniques provided effective postoperative analgesia with median pain scores < 3/10 for patients following elbow surgery. Reasons other than rate of early catheter failure should dictate which approach is performed. Copyright © 2018. Published by Elsevier Inc.

  19. Cutting Balloon Angioplasty in the Treatment of Short Infrapopliteal Bifurcation Disease.

    PubMed

    Iezzi, Roberto; Posa, Alessandro; Santoro, Marco; Nestola, Massimiliano; Contegiacomo, Andrea; Tinelli, Giovanni; Paolini, Alessandra; Flex, Andrea; Pitocco, Dario; Snider, Francesco; Bonomo, Lorenzo

    2015-08-01

    To evaluate the safety, feasibility, and effectiveness of cutting balloon angioplasty in the management of infrapopliteal bifurcation disease. Between November 2010 and March 2013, 23 patients (mean age 69.6±9.01 years, range 56-89; 16 men) suffering from critical limb ischemia were treated using cutting balloon angioplasty (single cutting balloon, T-shaped double cutting balloon, or double kissing cutting balloon technique) for 47 infrapopliteal artery bifurcation lesions (16 popliteal bifurcation and 9 tibioperoneal bifurcation) in 25 limbs. Follow-up consisted of clinical examination and duplex ultrasonography at 1 month and every 3 months thereafter. All treatments were technically successful. No 30-day death or adverse events needing treatment were registered. No flow-limiting dissection was observed, so no stent implantation was necessary. The mean postprocedure minimum lumen diameter and acute gain were 0.28±0.04 and 0.20±0.06 cm, respectively, with a residual stenosis of 0.04±0.02 cm. Primary and secondary patency rates were estimated as 89.3% and 93.5% at 6 months and 77.7% and 88.8% at 12 months, respectively; 1-year primary and secondary patency rates of the treated bifurcation were 74.2% and 87.0%, respectively. The survival rate estimated by Kaplan-Meier analysis was 82.5% at 1 year. Cutting balloon angioplasty seems to be a safe and effective tool in the routine treatment of short/ostial infrapopliteal bifurcation lesions, avoiding procedure-related complications, overcoming the limitations of conventional angioplasty, and improving the outcome of catheter-based therapy. © The Author(s) 2015.

  20. Temporary percutaneous T-fastener gastropexy and continuous decompressive gastrostomy in dogs with experimentally induced gastric dilatation.

    PubMed

    Fox-Alvarez, W Alexander; Case, J Brad; Cooke, Kirsten L; Garcia-Pereira, Fernando L; Buckley, Gareth J; Monnet, Eric; Toskich, Beau B

    2016-07-01

    OBJECTIVE To evaluate a percutaneous, continuous gastric decompression technique for dogs involving a temporary T-fastener gastropexy and self-retaining decompression catheter. ANIMALS 6 healthy male large-breed dogs. PROCEDURES Dogs were anesthetized and positioned in dorsal recumbency with slight left-lateral obliquity. The gastric lumen was insufflated endoscopically until tympany was evident. Three T-fasteners were placed percutaneously into the gastric lumen via the right lateral aspect of the abdomen, caudal to the 13th rib and lateral to the rectus abdominis muscle. Through the center of the T-fasteners, a 5F locking pigtail catheter was inserted into the gastric lumen and attached to a device measuring gas outflow and intragastric pressure. The stomach was insufflated to 23 mm Hg, air was allowed to passively drain from the catheter until intraluminal pressure reached 5 mm Hg for 3 cycles, and the catheter was removed. Dogs were hospitalized and monitored for 72 hours. RESULTS Mean ± SD catheter placement time was 3.3 ± 0.5 minutes. Mean intervals from catheter placement to a ≥ 50% decrease in intragastric pressure and to ≤ 6 mm Hg were 2.1 ± 1.3 minutes and 8.4 ± 5.1 minutes, respectively. After catheter removal, no gas or fluid leakage at the catheter site was visible laparoscopically or endoscopically. All dogs were clinically normal 72 hours after surgery. CONCLUSIONS AND CLINICAL RELEVANCE The described technique was performed rapidly and provided continuous gastric decompression with no evidence of postoperative leakage in healthy dogs. Investigation is warranted to evaluate its effectiveness in dogs with gastric dilatation-volvulus.

  1. [Preventing complications due to dilatation by intracervical application of a prostaglandin-gel (author's transl)].

    PubMed

    Kühnie, H; Grande, P; Kuhn, W

    1977-08-01

    Mechanical injuries by dilatating the cervix uteri for artificial abortion may lead to intra- and postoperative complications; of these cervical insufficiency during subsequent pregnancy is of main importance. In order to prevent this complication 160 patients in the 8th to 18th week of pregnancy, who were going to have a legal abortion, were treated with a gel consisting of 3--5 mg Prostaglandin F2alpha which was applicated in the cervix uteri. In more than 90% of these cases a mechanical dilatation was not necessary afterwards. Generally the cervix uteri was softened and dilatated to Hegar 12. 32% of the patients had a spontaneous abortion. Therefore only a curettage without a dilatation had to be performed. Complications due to the application of the gel did not occur. The combined application of the gel with the extraamnial instillation of Prostaglandin for artificial abortion during the second trimenon reduced by half the period of indwelling of the intrauterine foley-catheter and therewith the risk of infection as well as the period of labour pains. Further possible ways of applicating the Prostaglandin gel in gynecology and obstetrics concern missed abortion, intrauterine death, and cervical dystocia during delivery.

  2. Investigation of hot air balloon fatalities.

    PubMed

    McConnell, T S; Smialek, J E; Capron, R G

    1985-04-01

    The rising popularity of the sport of hot air ballooning has been accompanied by several recent incidents, both in this country and other parts of the world, where mechanical defects and the improper operation of balloons have resulted in several fatalities. A study was conducted to identify the location and frequency of hot air ballooning accidents. Furthermore, the study attempted to identify those accidents that were the result of improper handling on the part of the balloon operators and those that were related to specific defects in the construction of the balloon. This paper presents a background of the sport of hot air ballooning, together with an analysis of the construction of a typical hot air balloon, pointing out the specific areas where defects may occur that could result in a potential fatal balloon crash. Specific attention is given to the two recent balloon crashes that occurred in Albuquerque, N.M., hot air balloon capital of the world, and that resulted in multiple fatalities.

  3. 21 CFR 876.5470 - Ureteral dilator.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Ureteral dilator. 876.5470 Section 876.5470 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5470 Ureteral dilator. (a...

  4. 21 CFR 876.5520 - Urethral dilator.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Urethral dilator. 876.5520 Section 876.5520 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5520 Urethral dilator. (a...

  5. 21 CFR 876.5450 - Rectal dilator.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Rectal dilator. 876.5450 Section 876.5450 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5450 Rectal dilator. (a) Identification. A rectal...

  6. Salivary gland enlargement during oesophageal stricture dilatation.

    PubMed Central

    Martin, D.

    1980-01-01

    A case of recurrent salivary gland enlargement occurring during fibreoptic oesophagoscopy and oesophageal stricture dilatation with Eder-Puestow dilators is described. The genesis of this condition is discussed and its transient and usually benign nature emphasized. Images Fig. 1 PMID:7393809

  7. 21 CFR 876.5365 - Esophageal dilator.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Esophageal dilator. 876.5365 Section 876.5365 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5365 Esophageal dilator. (a...

  8. 21 CFR 876.5450 - Rectal dilator.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Rectal dilator. 876.5450 Section 876.5450 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5450 Rectal dilator. (a) Identification. A rectal...

  9. 21 CFR 876.5470 - Ureteral dilator.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Ureteral dilator. 876.5470 Section 876.5470 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES GASTROENTEROLOGY-UROLOGY DEVICES Therapeutic Devices § 876.5470 Ureteral dilator. (a...

  10. Catheter-based photoacoustic endoscope

    PubMed Central

    Yang, Joon-Mo; Li, Chiye; Chen, Ruimin; Zhou, Qifa; Shung, K. Kirk; Wang, Lihong V.

    2014-01-01

    Abstract. We report a flexible shaft-based mechanical scanning photoacoustic endoscopy (PAE) system that can be potentially used for imaging the human gastrointestinal tract via the instrument channel of a clinical video endoscope. The development of such a catheter endoscope has been an important challenge to realize the technique’s benefits in clinical settings. We successfully implemented a prototype PAE system that has a 3.2-mm diameter and 2.5-m long catheter section. As the instrument’s flexible shaft and scanning tip are fully encapsulated in a plastic catheter, it easily fits within the 3.7-mm diameter instrument channel of a clinical video endoscope. Here, we demonstrate the intra-instrument channel workability and in vivo animal imaging capability of the PAE system. PMID:24887743

  11. High Altitude Ozone Research Balloon

    NASA Technical Reports Server (NTRS)

    Cauthen, Timothy A.; Daniel, Leslie A.; Herrick, Sally C.; Rock, Stacey G.; Varias, Michael A.

    1990-01-01

    In order to create a mission model of the high altitude ozone research balloon (HAORB) several options for flight preparation, altitude control, flight termination, and payload recovery were considered. After the optimal launch date and location for two separate HAORB flights were calculated, a method for reducing the heat transfer from solar and infrared radiation was designed and analytically tested. This provided the most important advantage of the HAORB over conventional balloons, i.e., its improved flight duration. Comparisons of different parachute configurations were made, and a design best suited for the HAORB's needs was determined to provide for payload recovery after flight termination. In an effort to avoid possible payload damage, a landing system was also developed.

  12. Balloon Dilation of Sinus Ostia in the Department of Defense: Diagnoses, Actual Indications, and Outcomes

    DTIC Science & Technology

    2016-05-18

    acute rhinosinusitis. However, this technology is often advertised and utilized for off-label indications, which lack evidence - based support...DEPARTMENT OF THE AIR FORCE 59TH MEDICAL WING (AETC) JOINT BASE SAN ANTONIO - LACKLAND TEXAS MEMORANDUM FOR 959 MDOS ATTN: MAJ ADRIENNE LAURY...McMains, MD1 1 Department of Otolaryngology-Head and Neck Surgery , San Antonio Uniformed Services Health Education Consortium (SAUSHEC), Ft. Sam

  13. Balloon Blocking Technique (BBT) for Superselective Catheterization of Inaccessible Arteries with Conventional and Modified Techniques

    SciTech Connect

    Morishita, Hiroyuki, E-mail: hmorif@koto.kpu-m.ac.jp, E-mail: mori-h33@xa2.so-net.ne.jp; Takeuchi, Yoshito, E-mail: yotake62@qg8.so-net.ne.jp; Ito, Takaaki, E-mail: takaaki@koto.kpu-m.ac.jp

    2016-06-15

    PurposeThe purpose of the study was to retrospectively evaluate the efficacy and safety of the balloon blocking technique (BBT).Materials and MethodsThe BBT was performed in six patients (all males, mean 73.5 years) in whom superselective catheterization for transcatheter arterial embolization by the conventional microcatheter techniques had failed due to anatomical difficulty, including targeted arteries originating steeply or hooked from parent arteries. All BBT procedures were performed using Seldinger’s transfemoral method. Occlusive balloons were deployed and inflated at the distal side of the target artery branching site in the parent artery via transfemoral access. A microcatheter was delivered from a 5-F cathetermore » via another femoral access and was advanced over the microguidewire into the target artery, under balloon blockage of advancement of the microguidewire into non-target branches. After the balloon catheter was deflated and withdrawn, optimal interventions were performed through the microcatheter.ResultsAfter success of accessing the targeted artery by BBT, optimal interventions were accomplished in all patients with no complications other than vasovagal hypotension, which responded to nominal therapy.ConclusionThe BBT may be useful in superselective catheterization of inaccessible arteries due to anatomical difficulties.« less

  14. Peripheral Applications of Drug-Coated Balloons: Past, Present and Future

    SciTech Connect

    Krokidis, Miltiadis, E-mail: mkrokidis@hotmail.com; Spiliopoulos, Stavros, E-mail: stavspiliop@upatras.gr; Katsanos, Konstantinos, E-mail: katsanos@med.upatras.gr

    2013-04-15

    Drug-coated balloon (DCB) technologies represent the latest and hottest development in the field of endovascular treatment of peripheral arterial disease. Initial experience with paclitaxel-coated balloon use in the femoral artery has demonstrated lower mid-term restenosis and superior mid-term clinical outcomes in terms of improved wound healing and reduced repeat angioplasty rates compared with standard balloon angioplasty. Many companies are presently developing and/or improving DCB catheters and therefore ongoing, technical improvements of the already existing platforms, new drugs, and innovative carriers are expected. The ongoing basic research studies and various multicenter randomized, controlled trials that are currently in progress will offermore » valuable scientific insights regarding the long-term effectiveness and other crucial issues, such as efficacy in various vascular beds, optimal balloon dosage, and post angioplasty antiplatelet therapy. Future applications of these devices also could include in-stent restenosis, anastomotic stenosis of surgical bypass, and benign stenoses of the central venous system. The authors envision that DCB angioplasty will evolve to a major paradigm shift in the endovascular treatment of occlusive vascular diseases.« less

  15. Foley catheter placement for induction of labor with or without stylette: a randomized clinical trial.

    PubMed

    Forgie, Marie M; Greer, Danielle M; Kram, Jessica J F; Vander Wyst, Kiley B; Salvo, Nicole P; Siddiqui, Danish S

    2016-03-01

    Foley catheters are used for cervical ripening during induction of labor. Previous studies suggest that use of a stylette (a thin, rigid wire) to guide catheter insertion decreases insertion failure. However, stylette effects on insertion outcomes have been sparsely studied. The purpose of this study was to compare catheter insertion times, patient-assessed pain levels, and insertion failure rates between women who received a digitally placed Foley catheter for cervical ripening with the aid of a stylette and women who received the catheter without a stylette. We conducted a randomized clinical trial of women aged ≥ 18 years who presented for induction of labor. Inclusion criteria were singletons with intact membranes and cephalic presentation. Women received a computer-generated random assignment of a Foley catheter insertion with a stylette (treatment group, n = 62) or without a stylette (control group, n = 61). For all women, a standard insertion technique protocol was used. Three primary outcomes were of interest, including the following: (1) insertion time (total minutes to successful catheter placement), (2) patient-assessed pain level (0-10), and (3) failure rate of the randomly assigned insertion method. Treatment control differences were first examined using the Pearson's test of independence and the Student t test. Per outcome, we also constructed 4 regression models, each including the random effect of physician and fixed effects of stylette use with patient nulliparity, a history of vaginal delivery, cervical dilation at presentation, or postgraduate year of the performing resident physician. Women who received the Foley catheter with the stylette vs without the stylette did not differ by age, race/ethnicity, body mass index, or any of several other characteristics. Regression models revealed that insertion time, patient pain, and insertion failure were unrelated to stylette use, nulliparity, and history of vaginal delivery. However, overall insertion

  16. Angioplasty for Non-arteriosclerotic Renal Artery Stenosis: The Efficacy of Cutting Balloon Angioplasty Versus Conventional Angioplasty

    SciTech Connect

    Tanaka, Ryoichi; Higashi, Masahiro; Naito, Hiroaki

    2007-07-15

    Purpose. We examined the efficacy of conventional balloon angioplasty and cutting balloon angioplasty (CBA) for the treatment of non-arteriosclerotic renal artery stenosis (RAS). Materials and Methods. From 1993 to 2005, 20 patients underwent 27 percutaneous transluminal renalangioplasty (PTRA) for non-arteriosclerotic RAS (men: 8, women: 12, 25.5 +/- 2 years old; 16 fibromuscular dysplasia (FMD), 4 Takayasu disease). We evaluated the efficacy of CBA by comparing the rate of initial technical success and surgical conversion. Results. Before the clinical authorization of CBA, three of twelve patients (25 %) underwent surgical bypass due to the failure of PTRA due to the hardnessmore » of the lesion. After the approval of cutting balloon, we performed CBA in four cases (2 FMD,2 Takayasu disease) to dilate hard lesions, within which a properly sized balloon could not dilate due to their hardness, or to reduce the risk of local dissection. Initial successes were obtained in all patients (8/8, 100%) and none of the patients underwent surgical conversion. Despite of the good initial result, restenosis was observed in three cases within 6 month (3/4, 75 %). Additional interventions were performed in all patients, then, the severity of the restenotic lesion was found not to be exceeded comparing with the initial lesion. Conclusion. The cutting balloon angioplasty may be safe and useful procedure for hard lesions of RAS caused by non-arteriosclerotic disease? especially fibromuscular dysplasia. The cutting balloon may provide the initial success, but the effect on long-term patency is still controversial.« less

  17. [Reintervention with percutaneous balloon angioplasty in patients with congenital heart disease with left-sided obstructions].

    PubMed

    Márquez-González, Horacio; López-Gallegos, Diana; Pérez-Velázquez, Nataly Alejandra; Yáñez-Gutiérrez, Lucelli

    2017-01-01

    Left-sided cardiac obstructions represent 15% of congenital heart disease (CHD). The treatment in adults is surgical; however, balloon dilation by interventional catheterization can alleviate the symptoms in pediatric patients to allow them to reach the target height. The aim was to determine the survival and the factors associated with reintervention in patients with CHD with left-sided obstruction treated with balloon angioplasty. A cohort study was conducted in patients aged 4 to 17 years with left-sided heart obstruction (valvular stenosis [VS], supravalvular aortic stenosis [SAS], coarctation of the aorta [CA]) successfully treated with balloon angioplasty. The follow-up was of 10 years and the outcome variable was the restenosis with reintervention criteria. Pediatric stage at the time of the procedure, nutritional status, residual gradient, and presence of genetic syndromes were considered prognostic variables. For statistical analysis, measures of central tendency and dispersion were used. Chi squared was employed in qualitative variables and Kruskal-Wallis in quantitative variables. We had a total of 110 patients: 40% had CA, 35% VS, and 25% SAS. 39% required reintervention: 80% in SAS, 35% in CA, and 14% in VS. The intervention balloon is a stopgap measure that allows patients with left-sided obstructions to reach the target height.

  18. The National Scientific Balloon Facility. [balloon launching capabilities of ground facility

    NASA Technical Reports Server (NTRS)

    Kubara, R. S.

    1974-01-01

    The establishment and operation of the National Scientific Balloon Facility are discussed. The balloon launching capabilities are described. The ground support systems, communication facilities, and meteorological services are analyzed.

  19. Genetics Home Reference: X-linked dilated cardiomyopathy

    MedlinePlus

    ... Twitter Home Health Conditions X-linked dilated cardiomyopathy X-linked dilated cardiomyopathy Printable PDF Open All Close ... Javascript to view the expand/collapse boxes. Description X-linked dilated cardiomyopathy is a form of heart ...

  20. Echogenic Catheters and Embryo Transfer Standardization.

    PubMed

    Urbina, Maria Teresa; Benjamin, Isaac; Medina, Randolfo; Lerner, Jorge

    2015-05-01

    1.To describe the standardization process and protocols of the ET method at our center. 2.To compare the performance of non-echogenic catheters with echogenic catheters during ultrasound-guided ET. Retrospective analysis of 2630 ET performed at UNIFERTES during 1997-2014, to describe standardization process and to compare the percentage of difficult ET between echogenic and non-echogenic catheters. We tested 17 non-echogenic and three echogenic catheters. Many variables were associated with the ease of ET: informed patients, waiting time for the procedure, speculum use, clinical touch, uterine contractions, cervical mucus removal, presence of blood before or after the procedure, full bladder, ultrasound guidance, uterocervical angle, mock transfer, catheter type (soft or hard, echogenic or non-echogenic, with stylet or not), catheter loading technique, duration of embryo loading (time interval since the embryos were removed from the incubator for loading until the catheter is passed to the physician), transfer procedure (time interval from the catheter was handed to the physician until the embryos were discharged in the uterus), catheter tip placement, retained embryos, bed rest after ET, operator´s proficiency. The diversity of catheters used and the percentage of difficult transfers decrease as the use of echogenic catheters increases. This process is necessary to minimize variation, ensure high quality, safe and evidence-based practice, and improve outcomes. To standardize the ET method allowed a quicker and easier transfer. The use of echogenic catheters simplified ET procedures guided by abdominal ultrasound.

  1. Feasibility and Proposed Training Pathway for Austere Application of Resuscitative Balloon Occlusion of the Aorta.

    PubMed

    Ross, Elliot M; Redman, Theodore T

    Noncompressible junctional and truncal hemorrhage remains a significant cause of combat casualty death. Resuscitative endovascular balloon occlusion of the aorta (REBOA) is an effective treatment for many junctional and noncompressible hemorrhages. The current hospital standard for time of placement of REBOA is approximately 6 minutes. This study examined the training process and the ability of nonsurgical physicians to apply REBOA therapy in an austere field environment. This was a skill acquisition and feasibility study. The participants for this experiment were two board-certified military emergency medicine physicians with no prior endovascular surgery exposure. Both providers attended two nationally recognized REBOA courses for training. A perfused cadaver model was developed for the study. Each provider then performed REBOA during different phases of prehospital care. Time points were recorded for each procedure. There were 28 REBOA catheter placement attempts in 14 perfused cadaver models in the nonhospital setting: eight placements in a field setting, eight placements in a static ambulance, four placements in a moving ambulance, and eight placements inflight on a UH-60 aircraft. No statistically significant differences with regard to balloon inflation time were found between the two providers, the side where the catheter was placed, or individual cadaver models. Successful placement was accomplished in 85.7% of the models. Percutaneous access was successful 53.6% of the time. The overall average time for REBOA placement was 543 seconds (i.e., approximately 9 minutes; median, 439 seconds; 95% confidence interval [CI], 429-657) and the average placement time for percutaneous catheters was 376 seconds (i.e., 6.3 minutes; 95% CI, 311-44 seconds) versus those requiring vascular cutdown (821 seconds; 95% CI, 655-986). Importantly, the time from the decision to convert to open cutdown until REBOA placement was 455 seconds (95% CI, 285-625). This study demonstrated

  2. Vertical sounding balloons for stratospheric photochemistry

    NASA Astrophysics Data System (ADS)

    Pommereau, J. P.

    The use of vertical sounding balloons for stratospheric photochemistry studies is illustrated by the use of a vertical piloted gas balloon for the search of NO2 diurnal variations. It is s