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1

[Superior vena cava syndrome with malignant causes].  

PubMed

Superior vena cava syndrome comprises various symptoms and signs resulting from the obstruction of the superior vena cava and resulting in reduced blood flow. Superior vena cava may occur secondary to a variety of conditions, but malignant etiologies are the most common. Usually, the diagnosis is based on a quite clear clinical presentation. Patient with acute presentation can develop life-threatening complications such as cerebral or laryngeal edema. In the absence of these two conditions, a histologic diagnosis should be obtained before the initiation of any therapy. Management of superior vena cava syndrome requires a multidisciplinary team. Therapeutic approaches include radiotherapy, chemotherapy and endovascular approach, and the choice of therapy will depend on the severity of the symptoms, the type and the stage of the tumor, but also the patient's general condition. PMID:25457217

Bellefqih, S; Khalil, J; Mezouri, I; Afif, M; Elmajjaoui, S; Kebdani, T; Benjaafar, N

2014-12-01

2

Ultrasound Detection of Superior Vena Cava Thrombus  

PubMed Central

Superior vena cava (SVC) syndrome is most commonly the insidious result of decreased vascular flow through the SVC due to malignancy, spontaneous thrombus, infections, and iatrogenic etiologies. Clinical suspicion usually leads to computed tomography to confirm the diagnosis. However, when a patient in respiratory distress requires emergent airway management, travel outside the emergency department is not ideal. With the growing implementation of point-of-care ultrasound (POCUS), clinicians may make critical diagnoses rapidly and safely. We present a case of SVC syndrome due to extensive thrombosis of the deep venous system cephalad to the SVC diagnosed by POCUS. PMID:25247051

Birch, Aaron; Um, David; Laselle, Brooks

2014-01-01

3

Palliative treatment of superior vena cava syndrome with nitinol stents.  

PubMed

This study aims to retrospectively evaluate the outcomes following nitinol stent placement for malignant superior vena cava syndrome. A total of 25 patients with thoracic malignancies were treated with self-expanding nitinol stents for superior vena cava syndrome (E*Luminexx [Bard GmbH/Angiomed, Karlsruhe, Germany], Sinus-XL [OptiMed Medizinische Instrumente GmbH, Ettlingen, Germany], and Zilver Vena [Cook Medical Inc., Bloomington, IN]). It was seen that the procedural success rate was 76% with all stents deployed as intended and no procedure-related complications but in five patients with 50% residual stenosis and one patient with stent occlusion within 48 hours after stent deployment. Stent occlusion occurred in further two patients during follow-up: one patient developed infection, thrombosis, and occlusion in the stent seen at 2-month follow-up, and one patient had stent occlusion at 4-month follow-up. The clinical success rate was 96%. Stent compression leading to a greater than 50% reduction in stent diameter was observed in three patients at follow-up. Overall 22 patients died at a mean follow-up of 3.5 months for reasons related to their underlying malignancy. It was concluded that the stent treatment for superior vena cava syndrome is a safe treatment with good clinical effect in patients with superior vena cava syndrome in the terminal phase of malignant disease. In this small patient population, no trends were observed which would suggest that outcomes vary by stent type, though additional, large-scale studies are needed. PMID:25484557

Andersen, Poul Erik; Duvnjak, Stevo

2014-12-01

4

Concomitant Persistent Left Superior Vena Cava and Horseshoe Kidney  

PubMed Central

Persistent left superior vena cava (PLSVC) and horseshoe kidney (HSK) are common congenital abnormalities; however presence of both in the same person is extremely rare. A patient with hepatitis C cirrhosis awaiting transplant presented with worsening liver dysfunction, diagnosed with acute renal failure secondary to hepatorenal syndrome, and required X-ray fluoroscopy guided tunneled venous catheter placement for hemodialysis. Review of imaging studies demonstrated coexistence of PLSVC and HSK. PLSVC in adulthood is usually incidental with the most common drainage pattern being without physiologic dysfunction. Isolated horseshoe kidney is still the most common of renal fusion anomalies; however etiology of coexistent PLSVC remains unknown.

Jaffer, Faraz; Chandiramani, Vijay

2015-01-01

5

Transvenous Biventricular Pacing for Cardiac Resynchronization Therapy in Patients with Persistent Left Superior Vena Cava and Right Superior Vena Cava Atresia  

PubMed Central

Biventricular pacing for cardiac resynchronization therapy is an effective adjunctive therapy for the treatment of symptomatic moderate and severe congestive heart failure. However, experience with transvenous cardiac resynchronization therapy in patients who have both persistent left superior vena cava and right superior vena cava atresia is extremely limited. We successfully performed cardiac resynchronization therapy in 2 patients who had persistent left superior vena cava, right superior vena cava atresia, and congestive heart failure. Our 2 cases demonstrate the possibility of a total transvenous approach for left ventricular pacing despite the presence of serious cardiac venous anomalies. This approach enables clinicians to avoid the riskier epicardial lead placement, which requires a thoracotomy under general anesthesia. PMID:18427654

Lopez, J. Alberto

2008-01-01

6

Catheter-Induced Thrombosis of the Superior Vena Cava  

PubMed Central

There has been an increase in the use of central venous catheters (CVCs) in clinical practice. One of the most dangerous complications associated with their use is symptomatic or asymptomatic thrombosis (T), sometimes associated with superior vena cava (SVC) syndrome, resulting from impaired venous drainage. The right heart clots can induce an increased risk of mortality due the potential pulmonary embolism (PE). We report a case of asymptomatic 83-year-old woman in whom the thrombosis was detected after an echocardiogram. Echocardiography demonstrated a cardiac mass, and the T was confirmed by (magnetic resonance imaging) MRI. The clinical scenario, a high index of suspicion and routine use of echocardiogram in patients with CVC, can lead to a correct diagnosis, preventing dangerous complications. PMID:23198269

Venturini, Elio; Becuzzi, Lucia; Magni, Lucia

2012-01-01

7

Heart Transplantation in a Patient with Persistent Left Superior Vena Cava  

PubMed Central

A 56-year-old male presented with severe exertional dyspnea and pitting edema in the lower extremities. The pre-operative evaluation demonstrated biventricular dysfunction associated with severe tricuspid valve regurgitation and a persistent left superior vena cava. He was registered as a transplantation candidate, and orthotopic heart transplantation was performed using the standard bicaval technique. The left superior vena cava was connected to the right atrial appendage after the construction of a conduit using the recipient’s autologous coronary sinus tissue. One-month postoperatively, computed tomography imagery demonstrated a patent conduit between the left superior vena cava and right atrial appendage. PMID:25551075

Lee, Jae-Hong; Park, Eun-Ah; Lee, Whal; Cho, Hyun-Jai; Kim, Ki-Bong; Hwang, Ho Young

2014-01-01

8

Isolated right superior vena cava drainage into the left atrium diagnosed noninvasively in the peripartum period.  

PubMed

Isolated right superior vena cava drainage into the left atrium is an extremely rare cardiac anomaly, especially in the absence of other cardiac abnormalities. Only 28 of 5,127 reported consecutive congenital cardiac cases involved superior vena cava drainage into the left atrium, and all were associated with other cardiac anomalies. Of 19 reported cases of right superior vena cava drainage into the left atrium, most patients have been children who were experiencing mild hypoxemia and cyanosis. Herein, we describe the case of a 34-year-old woman who presented with asymptomatic hypoxemia in the peripartum period. She was diagnosed to have isolated drainage of the right superior vena cava into the left atrium. To the best of our knowledge, this is the 1st reported instance of such diagnosis by use of noninvasive imaging only, without cardiac catheterization. We also review the medical literature that pertains to our patient's anomaly. PMID:20069093

Baggett, Charles; Skeen, Shawn J; Gantt, D Scott; Trotter, Bradley R; Birkemeier, Krista L

2009-01-01

9

Side matters: An intriguing case of persistent left superior vena-cava  

PubMed Central

Persistent left superior vena cava, usually an incidental finding, is the most common thoracic vein anatomical variation draining into the coronary sinus. Central venous catheter procedures may be complicated secondary to the presence of a persistent left superior vena cava, leading to life-threatening complications such as arrhythmias, cardiogenic shock, and cardiac arrest. We present a case of persistent superior vena cava diagnosed on transthoracic echocardiogram (TTE) in a patient with congestive heart failure. A dilated coronary sinus was identified on TTE, followed by injection of agitated saline into the left antecubital vein resulting in filling of the coronary sinus prior to the right atrium-an indication of persistent left superior vena-cava. This also was confirmed on cardiac computed tomography. Such a diagnosis is critical in patients who may undergo central venous catheter procedures such as our patient’s potential requirement for an implantable cardiovertor defibrillator due to severe global left ventricular systolic dysfunction. The presence of a persistent left superior vena cava should always be suspected when the guidewire takes a left-sided downward course towards the right atrium at the level of the coronary sinus. Therefore, special attention should be paid to the imaging work-up prior to central venous catheter procedures. PMID:24303491

Siddiqui, Adeel M; Cao, Long-Bao; Movahed, Assad

2013-01-01

10

[Unusual course of a pulmonary artery catheter through a persistent superior vena cava] .  

PubMed

We report the unusual course of a pulmonary artery catheter through a persistent left-sided superior vena cava. After left subclavian vein cannulation and downward left-sided paramediastinum course, the Swan-Ganz catheter enters the right pulmonary artery. Haemodynamic monitoring was consistent with the diagnosis of septic shock developed by this 56-year-old woman, after cephalic duodenopancreatectomy. Persistent left-sided superior vena cava occurs in 0.5% of the population and 5-10% of patients with congenital heart diseases. It drains into the right atrium through the coronary sinus in 92% of cases and is associated with an absent right superior vena cava in 20% of cases. The left-sided superior vena cava persists when the caudal part of the left anterior cardinal vein does not degenerate. A persistent left superior vena cava may be medically relevant during implantation of pacemaker leads or radiofrequency ablation, during cardiac surgery for placement of a retrograde coronary sinus cardioplegia catheter and during transjugular intrahepatic portosystemic shunt placement. PMID:11200762

Ould-Ahmed, M; Mas, B; Hautbois, E; Garcia, J F; Caroff, P; Guiavarch, M

2000-12-01

11

Intracaval and intracardiac extension of invasive thymoma complicated by superior and inferior vena cava syndrome.  

PubMed

We present a case of an aged male with invasive thymoma that extended into the right atrium and led to superior and inferior vena cava syndrome. The patient initially presented with edema of the face and bilateral lower extremities. Echocardiography revealed a mass within the right atrium. Imaging studies demonstrated an anterior mediastinal tumor that continuously occupied the bilateral brachiocephalic veins, superior vena cava, and right atrium. Pathological diagnosis of the tumor biopsy was highly suspicious of thymoma. Due to the high risk of wide spread of the tumor, treatments including resection of the tumor were impossible. Several days later he died, and an autopsy was performed. The tumor was type B2 thymoma invading bilateral brachiocephalic veins, superior vena cava and right atrium. Multiple tumor emboli within the pulmonary arteries were identified. Direct cause of death was deemed to be tumor strangulation at the tricuspid orifice. In addition to the superior vena cava syndrome, inferior vena cava syndrome including ectasia of the intrahepatic vessels was confirmed along with pericarditis. To our knowledge, this is the first English report of an autopsy case of intracardiac thymoma extension, and a detailed literature review of similar cases is also presented. PMID:23356226

Kurata, Atsushi; Saji, Hisashi; Ikeda, Norihiko; Kuroda, Masahiko

2013-01-01

12

Pseudoaneurysm of Surgically Reconstructed Right Ventricular Outflow Tract Complicated by Superior Vena Cava Syndrome  

PubMed Central

Pseudoaneurysm of the right ventricular outflow tract (RVOT) has been reported as a rare complication of RVOT reconstruction performed using conduit replacement or patch repair. Rarely, it may present alongside symptoms secondary to the compression of adjoining mediastinal structures. We report the case of a patient who developed a symptomatic RVOT pseudoaneurysm one month after a total correction of tetralogy of Fallot. In the present case, superior vena cava syndrome was caused by compression of the superior vena cava, which was a very unusual presentation.

Lee, Youngok; Lee, Jong Tae; Cho, Joon Yong; Kim, Gun Jik

2014-01-01

13

Superior vena cava to pulmonary artery anastomosis: An adjunct to biventricular repair  

Microsoft Academic Search

From May 1981 to September 1995, 38 patients received a superior vena cava–pulmonary artery anastomosis in association with biventricular repair. Patients were divided into four groups on the basis of indication for operation. Group A (19 patients) had a small physiologic right ventricle defined by tricuspid anulus z values or predicted right ventricular volume. Group B (11 patients) had a

Glen S. Van Arsdell; William G. Williams; Catherine M. Maser; Kim S. Streitenberger; Ivan M. Rebeyka; John G. Coles; Robert M. Freedom

1996-01-01

14

Flow study of an extracardiac connection with persistent left superior vena cava  

E-print Network

and the left superior vena cava resulted in flow stasis and unbalanced hepatic flow distribution. Shifting losses and eliminated the associated flow stasis regions in the main pulmonary artery segment. Conclusions: This study demonstrates the potential use of computer-aided design and numeric simulations

Pekkan, Kerem

15

Right nutcracker syndrome associated with left-sided inferior vena cava, hemiazygos continuation and persistant left superior vena cava: a rare combination.  

PubMed

The term nutcracker syndrome refers to compression of left renal vein between aorta and superior mesenteric artery causing renal venous hypertension. Right nutcracker syndrome associated with a left-sided inferior vena cava is an extremely rare anomaly. Reported two cases in English literature were diagnosed by ultrasonography and computed tomography angiography in adulthood. Herein, we present a case of right nutcracker syndrome with left-sided inferior vena cava and hemiazygos continuation in a 12-year-old girl. PMID:24461470

Yildiz, Adalet Elcin; Cayci, Fatma Semsa; Genc, Sinan; Cakar, Nilgun; Fitoz, Suat

2014-01-01

16

Transjugular intrahepatic portosystemic shunt with accidental diagnosis of persistence of the left superior vena cava.  

PubMed

Transjugular intrahepatic portosystemic shunt (TIPSS) is considered a valid therapeutic option for the treatment of portal hypertension and its complications. The guidelines for this procedure have already been established on the basis of the normal vascular anatomy and of various technical radiological aspects. In some few rare cases, diagnosis of a congenital vascular anomaly can be made accidentally by interventional radiologists, making the procedure of the TIPSS placement extremely difficult or in some cases technically impossible. This report describes a rare vascular malformation characterized by the absence of the right superior vena cava and persistence of the left superior vena cava in a patient with a diagnosis of advanced liver cirrhosis who needed a TIPSS placement in order to control refractory ascites. PMID:20205290

Petridis, Ioannis; Miraglia, Roberto; Marrone, Gianluca; Gruttadauria, Salvatore; Luca, Angelo; Vizzini, Giovanni Battista; Gridelli, Bruno

2010-03-01

17

Radiofrequency Guide Wire Recanalization of Venous Occlusions in Patients with Malignant Superior Vena Cava Syndrome  

SciTech Connect

Fibrotic central venous occlusions in patients with thoracic malignancy and prior radiotherapy can be impassable with standard catheters and wires, including the trailing or stiff end of a hydrophilic wire. We report two patients with superior vena cava syndrome in whom we successfully utilized a radiofrequency guide wire (PowerWire, Baylis Medical, Montreal, Quebec, Canada) to perforate through the occlusion and recanalize the occluded segment to alleviate symptoms.

Davis, Robert M.; David, Elizabeth; Pugash, Robyn A.; Annamalai, Ganesan, E-mail: ganesan.annamalai@sunnybrook.ca [Sunnybrook Health Sciences Centre, Department of Interventional Radiology (Canada)

2012-06-15

18

Superior vena cava thrombosis and chylothorax: relationship in pediatric nephrotic syndrome  

Microsoft Academic Search

.   We report a 40-month-old black male with nephrotic syndrome who developed chylothorax associated with superior vena cava\\u000a (SVC) thrombosis. To our knowledge, this is the third reported case of spontaneous SVC thrombosis in a nephrotic patient and\\u000a the first in which chylothorax was also present. Ultrasonography of the pleura and thoracic vasculature was invaluable in\\u000a making the diagnosis and

James Hanna; Edward Truemper; Edward Burton

1997-01-01

19

Superior Vena Cava Stent Migration into the Pulmonary Artery Causing Fatal Pulmonary Infarction  

SciTech Connect

Migration of superior vena cava (SVC) stents is a well-recognised complication of their deployment, and numerous strategies exist for their retrieval. To our knowledge, only three cases of migration of an SVC stent to the pulmonary vasculature have previously been reported. None of these patients developed complications that resulted in death. We report a case of SVC stent migration to the pulmonary vasculature with delayed pulmonary artery thrombosis and death from pulmonary infarction. We conclude that early retrieval of migrated stents should be performed to decrease the risk of serious complications.

Anand, Girija, E-mail: gijanandm@hotmail.com; Lewanski, Conrad R.; Cowman, Steven A. [Charing Cross Hospital, Department of Clinical Oncology (United Kingdom); Jackson, James E. [Hammersmith Hospital, Department of Radiology (United Kingdom)

2011-02-15

20

Superior vena cava syndrome caused by a swollen absorbable haemostat after repair of ischaemic mitral regurgitation  

PubMed Central

Surgicel, an absorbable haemostat, is widely used in cardiovascular surgery. An 81-year-old woman, who was diagnosed with ischaemic mitral regurgitation, underwent mitral valve plasty and coronary artery bypass grafting. On postoperative day two, her superior vena cava (SVC) pressure gradually rose to 38 mmHg and she developed low output syndrome. Emergent surgery revealed that the cause of SVC syndrome was external compression from a haematoma at the posterior surface of the SVC, which formed around the Surgicel. PMID:24387601

2014-01-01

21

Temporary extravascular shunt for reconstruction of a superior vena cava invaded by a lung tumor.  

PubMed

Advanced central lung cancers can invade the superior vena cava (SVC). Although the indications for resection of the vessel remain controversial, it has been suggested that it increases the long-term survival of selected patients; however, little consensus has been reached regarding the optimal method of vascular reconstruction. While the SVC is often replaced during unprotected cross-clamp, the placement of a temporary venous shunt with a view to preserve the periprocedural safety and facilitate the postoperative management seems preferable. We describe an SVC reconstruction procedure using an autologous pericardial patch and placement of a temporary extravascular shunt via a lateral thoracotomy. PMID:25468109

Yotsukura, Masaya; Kinoshita, Tomonari; Kamiyama, Ikuo; Hato, Tai; Goto, Taichiro; Ohtsuka, Takashi; Yoshitake, Akihiro; Kudo, Mikihiko; Kohno, Mitsutomo

2014-12-01

22

Azygos Tip Placement for Hemodialysis Catheters in Patients with Superior Vena Cava Occlusion  

SciTech Connect

Chronic central venous access is necessary for numerous life-saving therapies. Repeated access is complicated by thrombosis and occlusion of the major veins, such as the superior vena cava (SVC), which then require novel vascular approaches if therapy is to be continued. We present two cases of catheterization of the azygos system in the presence of an SVC obstruction. We conclude that the azygos vein may be used for long-term vascular access when other conduits are unavailable and that imaging studies such as magnetic resonance venography, contrast-enhanced computed tomography or conventional venography can be employed prior to the procedure to aid with planning and prevent unforeseen complications.

Wong, Jeffrey J.; Kinney, Thomas B. [University of California, Department of Radiology (United States)], E-mail: tbkinney@ucsd.edu

2006-02-15

23

Life-threatening Cerebral Edema Caused by Acute Occlusion of a Superior Vena Cava Stent  

SciTech Connect

A71-year-old man with advanced lung cancer developed a life-threatening cerebral edema caused by the acute occlusion of a superior vena cava (SVC) stent and was successfully treated by an additional stent placement. Although stent occlusion is a common early complication, no life-threatening situations have been reported until now. Our experience highlights the fact that acute stent occlusion can potentially lead to the complete venous shutdown of the SVC, resulting in life-threatening cerebral edema, after SVC stent placement. Immediate diagnosis and countermeasures are required.

Sofue, Keitaro, E-mail: keitarosofue@yahoo.co.jp; Takeuchi, Yoshito, E-mail: yotake62@qg8.so-net.ne.jp; Arai, Yasuaki, E-mail: arai-y3111@mvh.biglobe.ne.jp [National Cancer Center Hospital, Department of Diagnostic Radiology (Japan)] [National Cancer Center Hospital, Department of Diagnostic Radiology (Japan); Sugimura, Kazuro, E-mail: sugimura@med.kobe-u.ac.jp [Kobe University, Department of Radiology, Graduate School of Medicine (Japan)] [Kobe University, Department of Radiology, Graduate School of Medicine (Japan)

2013-02-15

24

Permanent Pacemaker-Induced Superior Vena Cava Syndrome: Successful Treatment by Endovascular Stent  

SciTech Connect

The use of metallic stents in the management of benign and malignant superior vena cava syndrome (SVCS) is well documented. Symptomatic stenosis or occlusion of the SVC is a rare complication of a transvenous permanent pacemaker implant. Suggested treatments have included anticoagulation therapy, thrombolysis, balloon angioplasty and surgery. More recently, endovascular stenting has evolved as an attractive alternative but the data available in the literature are limited. We describe a case in which venous stenting with a Wallstent endoprosthesis was used successfully. The patient remains symptom free and with normal pacemaker function 36 months later.

Lanciego, Carlos [Hospital Virgen de la Salud, Hospital Virgen del Valle, Complejo Hospitalario de Toledo, Toledo, Unit of Interventional Radiology (Spain)], E-mail: clanciego@eresmas.com; Rodriguez, Mario [Hospital Virgen de la Salud, Hospital Virgen del Valle, Complejo Hospitalario de Toledo, Toledo, Unit of Intensive Care (Spain); Rodriguez, Adela; Carbonell, Miguel A. [Hospital Virgen de la Salud, Hospital Virgen del Valle, Complejo Hospitalario de Toledo, Toledo, Unit of Geriatrics (Spain); Garcia, Lorenzo Garcia [Hospital Virgen de la Salud, Hospital Virgen del Valle, Complejo Hospitalario de Toledo, Toledo, Unit of Interventional Radiology (Spain)

2003-11-15

25

Bilateral Breast Enlargement: An Unusual Presentation of Superior Vena Cava Obstruction in a Hemodialysis Patient with Fibrosing Mediastinitis  

SciTech Connect

A 67-year-old woman with end-stage renal disease presented with profound edema of both breasts. The presence of a patent hemodialysis basilic transposition fistula and superior vena cava obstruction (SVC), due to fibrosing mediastinitis, was demonstrated by the use of fistulography. Endovascular treatment with a balloon and stent caused immediate resolution of the breast edema.

Goo, Dong Erk, E-mail: degoo@hosp.sch.ac.kr; Kim, Yong Jae; Choi, Deuk Lin; Kwon, Kui Hyang; Yang, Seung Boo [Soonchunhyang University Hospital, Department of Radiology (Korea, Republic of)

2011-02-15

26

Initiation of Atrial Fibrillation by Ectopic Beats Originating From the Superior Vena Cava Electrophysiological Characteristics and Results of Radiofrequency Ablation  

Microsoft Academic Search

Background—The superior vena cava (SVC) has cardiac musculature extending from the right atrium. However, no previous study in humans has given details regarding the ectopic foci that initiate paroxysmal atrial fibrillation (PAF), which may originate from the SVC. Methods and Results—A total of 130 patients with frequent attacks of PAF initiated by ectopic beats were included. Eight patients (6%) had

Chin-Feng Tsai; Ching-Tai Tai; Ming-Hsiung Hsieh; Wei-Shiang Lin; Wen-Chung Yu; Kwo-Chang Ueng; Yu-An Ding; Mau-Song Chang; Shih-Ann Chen

2010-01-01

27

Superior vena cava syndrome: A rare complication of percutaneous nephrolithotripsy laser lithotripsy  

PubMed Central

Purpose: To describe a case of acute superior vena cava syndrome during percutaneous nephrolithotomy (PCNL), and to review the associated clinical features, management and complications. Clinical features: A 34-year-old man, diagnosed as right renal calculi and nodal tachycardia, was admitted to receive percutaneous nephroscope laser lithotripsy. Shortly after stone disintegration, he suffered acute hypoxic and hypotension, and showed cyanoderma of face and chest skin, ocular proptosis, jugular filling and ventricular fibrillation. Dopamine and adrenaline was intravenously injected. The patient was turned over to supine position and external cardiac massage and electric defibrillation were carried out immediately. The patient finally cardioverted. His vital signs subsequently became stable and cyanoderma faded. The patient was eventually discharged from the intensive care unit three days following the event. Conclusion: Severe complications such as cardiac arrest could happen during PCNL. Close monitoring the vital signs is essential for early finding and quick response to rescue. PMID:20842256

Qing, Ji; Jianjun, Yang; Hongbin, Jia; Lidong, Zhang

2010-01-01

28

Primary malignant pericardial mesothelioma—a rare cause of superior vena cava thrombosis and constrictive pericarditis  

PubMed Central

Primary malignant pericardial mesothelioma (PMPM) is an extremely rare, highly lethal and often misdiagnosed tumor. We report a 60-year-old woman complaining of dry cough, shortness of breath and exertional dyspnea due to a large pericardial effusion. The pericardial fluid volume declined after pericardiocentesis; analysis of the fluid revealed malignant cells and was negative for tuberculosis. Subsequently, the patient developed a compression of the superior vena cava and pericardial constriction. The patient’s symptoms marginally improved after partial pericardiectomy, and a diagnosis of pericardial mesothelioma was made on pathology. However, her symptoms continued to aggravate, and she died 8 months after presentation. Pericardial mesothelioma should be discovered earlier to treat patients who develop repeatedly pericardial effusion after pericardiocentesis and pericardial tamponade or those develop constrictive pericarditis. PMID:25590007

Gong, Wenhui; Ye, Xiaofeng; Shi, Kaihu

2014-01-01

29

Primary Pulmonary Ewing’s Sarcoma: Rare Cause of Superior Vena Cava Syndrome in Children  

PubMed Central

Ewing’s sarcoma is a common malignant bone tumour presenting in children and young adults. Rarely extra- skeletal soft tissues and visceral organs can also be the site of origin of Ewing’s sarcoma. Primary pulmonary Ewing’s sarcoma is an extremely rare malignancy which occurs in the paediatric population. We report an unusual case of primary pulmonary Ewing’s sarcoma in a nine year old girl who presented with features of superior vena cava syndrome in the emergency department. The diagnosis was confirmed pathologically both by light microscopy and immunohistochemistry. The patient was put on chemotherapy and surgery was planned but the patient expired within three days of starting chemotherapy. PMID:25302247

Atwal, Swapndeep Singh; Garga, Umesh Chandra

2014-01-01

30

Pulmonary Hilar Lymph Node Metastasis of Breast Cancer Induced Bronchopleural Fistula and Superior Vena Cava Syndrome  

PubMed Central

Patient: Female, 56 Final Diagnosis: Broncho-pleural fistula • empyema • supra-vena cava syndrome Symptoms: Dyspnea • fever • facial edema Medication: — Clinical Procedure: — Specialty: Oncology and Pulmonology Objective: Unusual clinical course Background: It is extremely rare for pulmonary hilar lymph node metastasis (PHLNM) of a cancer to be independently lethal. Here, we report an exceedingly rare case of cavitation in PHLNM from breast cancer triggering bronchopleural fistula and empyema (BPFE), complicated with superior vena cava syndrome (SVCS). Case Report: A 56-year-old woman who had undergone left segmental mastectomy and axillary lymph node dissection due to left breast cancer was then treated for 1 year with postoperative adjuvant chemotherapy. Recurrence of right PHLNM was observed 2 years after the operation, for which 3 courses of bevacizumab (BEV) and paclitaxel combination chemotherapy were administered. The woman had dyspnea and fever during the washout period, and CT examination revealed fistula formation between the right PHLNM cavitation and right main bronchus, so she was admitted for further treatment. This fistula rapidly progressed to BPFE, and contralateral aspiration was observed to cause pneumonia of the left lung. In addition, edema of both upper limbs and head and neck were observed, and CT examination revealed SVCS caused by re-enlargement of PHLNM. Active treatment was performed, but the recommencement of chemotherapy was not possible, and she died on Day 150 of admission. Conclusions: We think that PHLNM deteriorated to central necrosis due to chemotherapy with BEV taking effect, leading to formation of BPFE. The case was also made more difficult due to the complication of SVCS caused by the re-enlarged PHLNM. PMID:25399335

Nishinari, Yutaka; Kashiwaba, Masahiro; Umemura, Akira; Komatsu, Hideaki; Sasaki, Akira; Wakabayashi, Go

2014-01-01

31

Persistent left superior vena cava: diagnosed by bedside echocardiography in a liver transplant patient: a case report  

PubMed Central

In most cases, persistent left superior vena cava (PLSVC) is asymptomatic and discovered accidentally. This case involves a 43-year-old male who underwent an emergency cadaveric liver transplantation. Postoperatively, the left internal jugular vein was cannulated using a sono-guided Seldinger technique in the intensive care unit. But the chest X-ray showed that the catheter followed the left paramediastinal course instead of crossing midline to the right to enter the superior vena cava. In consideration of the patient's status, an intra-arterial or extra-vascular placement could be excluded. For a diagnosis, we performed a bed-side transthoracic echocardiography with an agitated saline micro-bubble test. When agitated saline was injected through the catheter, the coronary sinus was initially opacified, and then the right atrium followed. In conclusion, we were able to make a diagnosis of PLSVC by a bedside test without radiation exposure.

Kim, Hyerim; Kim, Jin Hee

2014-01-01

32

Prenatal Diagnosis of Persistent Left Superior Vena Cava and its Clinical Significance  

PubMed Central

Background: Persistent left superior vena cava (PLSVC) is a variant of systemic venous return which is observed in 0.3% of autopsies in the general population and in 4–8% of patients with congenital heart disease. Aims: To evaluate associated cardiac, extracardiac and chromosomal anomalies in prenatally diagnosed cases of PLSVC and to review their outcome. Study Design: Retrospective comparative study. Methods: The data of patients with a prenatal diagnosis of PLSVC between May 2008 and January 2013 were reviewed retrospectively. Results: Data of 31 cases were reviewed. Fifteen (48.4%) cases were associated with cardiac defects and 17 (54.8%) cases had associated extracardiac sonographic or postpartum findings. Two fetuses had karyotype anomalies. Outcome was significantly more favorable in cases not associated with cardiac defects in comparison to those associated with cardiac anomalies (84.6% vs. 33.3%, p=0.009). All cases with isolated PLSVC survived, while among the cases associated with extracardiac anomalies, with cardiac anomalies and with both extra-cardiac and cardiac anomalies, the survival rate was 75%, 50% and 22.2%, respectively. The most frequent group of cardiac anomalies associated with PLSVC was septal defects and VSD was the most common heart defect individually, being observed in nine fetuses. Conclusion: Prenatally diagnosed PLSVC is associated with cardiac and extracardiac anomalies in the majority of cases. Outcome is significantly worse if PLSVC is associated with a cardiac defect, and the prognosis is excellent in isolated cases. PMID:25207167

Esmer, Aytül Çorbac?o?lu; Yüksel, At?l; Çal?, Halime; Özsürmeli, Mehmet; Ömero?lu, Rukiye Eker; Kalelio?lu, ?brahim; Has, Recep

2014-01-01

33

Superior vena cava syndrome due to a leiomyosarcoma of the anterior mediastinum: A case report and literature overview  

PubMed Central

INTRODUCTION Leiomyosarcomas are an infrequent cause of malignant superior vena cava syndrome (VCS). PRESENTATION OF CASE A 51-year old male patient was admitted for a three-day history of dyspnoea, dysphagia and erythema of the head and neck. Computed tomography and magnetic resonance imaging showed a lesion arising on the anterior mediastinum, which was in close proximity with a thrombus in the superior vena cava. Surgical excision was performed, including open resection of the primary tumour and an atrio-innominate vein bypass with 8-mm polytetrafluoroethylene (PTFE). Histology confirmed a leiomyosarcoma and postoperative radiotherapy sessions were performed. Due to evidence of enlargement of the thrombus, a second intervention was undertaken. In this procedure, a remainder of the primary tumour was resected and the superior vena cava reconstructed with an autologous pericardium patch. The patient recovered satisfactorily and was discharged on the seventh postoperative day, with no evidence for relapse after 10 months of follow-up. DISCUSSION Leiomyosarcomas comprise less than 2% of the tumours of the mediastinum and are a rare cause of paraneoplastic VCS. Male patients in their sixties are most commonly affected. Relapses seem to be common, and thus a careful follow-up is often recommended. CONCLUSION In spite of the limited data on the management of thoracic leiomyosarcomas, surgery is currently considered the mainstay of treatment. PMID:25460453

Labarca, E.; Zapico, A.; Ríos, B.; Martinez, F.; Santamarina, M.

2014-01-01

34

Macro-reentrant atrial tachycardia conducting through a left superior vena cava after catheter ablation in a patient with paroxysmal atrial fibrillation.  

PubMed

A left superior vena cava can be a cause of cardiac rhythm or conduction abnormalities, and can also be the arrhythmogenic source of atrial fibrillation (AF) with connections to the coronary sinus and left atrium. In the present study, we report a case with a macro re-entrant atrial tachycardia that coursed through the left superior vena cava after a previous AF ablation, which successfully ablated paroxysmal AF. PMID:25547561

Kurotobi, Toshiya; Kino, Naoto; Tonomura, Daisuke; Shimada, Yoshihisa

2015-01-01

35

Renal transplantation with venous drainage through the superior mesenteric vein in cases of thrombosis of the inferior vena cava.  

PubMed

Renal transplantation usually is performed by placing the graft in the iliac fossa, anastomosing the renal vein to the iliac vein or, when this is not possible, to the vena cava. When vascular complications occur, particularly on the venous side, the position of the graft may have to be changed. This report describes orthotopic renal grafts and positioning of the organ with anastomosis to the splenic vessels. Venous drainage was established directly into the mesenteric-portal territory, with two cases to the portal vein and one to the inferior mesenteric vein. A new technique for the venous drainage of the renal graft is shown. We have used this model in two cases of infrarenal inferior vena cava thrombosis. The kidney was located in a retroperitoneal position, with venous drainage to the superior mesenteric vein through an orifice in the posterior peritoneum. PMID:12177625

Aguirrezabalaga, Javier; Novas, Serafín; Veiga, Francisco; Chantada, Venancio; Rey, Ignacio; Gonzalez, Marcelino; Gomez, Manuel

2002-08-15

36

Tricuspid valve obstruction and right heart failure due to a giant right atrial myxoma arising from the superior vena cava.  

PubMed

Myxomas are the most common primary cardiac tumors. The cardiac myxomas are mostly diagnosed within the atria, and only a few such tumors are reported to have arisen from atrioventricular valves or pulmonary vessels. The authors here present a case of 59-year-old Chinese woman who was hospitalized for exacerbating symptoms of tricuspid stenosis and right heart failure. Echocardiography revealed a giant right atrial myxoma arising from an extremely rare site, the anterior wall of the superior vena cava. With the aid of transesophageal echocardiography, the surgical resection was performed successfully with the patient achieving complete recovery. PMID:24172033

Xiao, Zheng-hua; Hu, Jia; Zhu, Da; Shi, Ying-kang; Zhang, Er-yong

2013-01-01

37

A case of primary mediastinal Ewing's sarcoma / primitive neuroectodermal tumor presenting with initial compression of superior vena cava  

PubMed Central

Ewing's sarcomas and peripheral primitive neuroectodermal tumors (ES/PNETs) are high grade malignant neoplasms. These malignancies are characterized by a chromosome 22 rearrangement, arise from bone or soft tissue, predominantly affect children and young adults, and are grouped in the Ewing family of tumors. Multimodality treatment programs are the treatment of choice. Primary localization of ES/PNET in the mediastinum is extremely rare. We describe a case of ES/PNET presenting as a mediastinal mass with tracheal compression and initial signs of superior vena cava in a 66-year-old woman. PMID:23741276

Reali, Alessia; Mortellaro, Gianluca; Allis, Simona; Trevisiol, Edoardo; Anglesio, Silvia Maria; Bartoncini, Sara; Redda, Maria Grazia Ruo

2013-01-01

38

Truncus Arteriosus with Persistent Left Superior Vena Cava: Cardiac Computed Tomography Findings in an Unrepaired Adult Patient  

PubMed Central

Truncus arteriosus (TA), a rare complex congenital cardiac disease in which systemic pulmonary and coronary circulations originate from a common vessel, develops due to failure of separation of the common trunk during embryonic life. In this case report, we discuss a 24-year-old patient with TA in whom a computed tomography angiography was performed. To the best of our knowledge, no case has been reported so far where an adult had combined left superior vena cava and pulmonary vein anomaly. PMID:24228215

Genç, Berhan; Okur, Faik Fevi; Tavl?, Vedide; Solak, Aynur

2013-01-01

39

Truncus arteriosus with persistent left superior vena cava: cardiac computed tomography findings in an unrepaired adult patient.  

PubMed

Truncus arteriosus (TA), a rare complex congenital cardiac disease in which systemic pulmonary and coronary circulations originate from a common vessel, develops due to failure of separation of the common trunk during embryonic life. In this case report, we discuss a 24-year-old patient with TA in whom a computed tomography angiography was performed. To the best of our knowledge, no case has been reported so far where an adult had combined left superior vena cava and pulmonary vein anomaly. PMID:24228215

Genç, Berhan; Okur, Faik Fevi; Tavl?, Vedide; Solak, Aynur

2013-01-01

40

Predicting preload responsiveness using simultaneous recordings of inferior and superior vena cava diameters.  

PubMed

IntroductionEchocardiographic indices based on respiratory variations of superior and inferior vena cava diameters (¿SVC and ¿IVC, respectively) have been proposed as predictors of fluid responsiveness in mechanically ventilated patients but they have never been compared simultaneously in the same patient sample. The aim of this study was to compare the predictive value of these echocardiographic indices when concomitantly recorded in mechanically ventilated, septic patients.MethodsSeptic shock patients requiring hemodynamic monitoring were prospectively enrolled over a 1-year period in a mixed medical surgical ICU of a University Teaching Hospital (Toulouse, France). All patients were mechanically ventilated. Predictive indices were obtained by transesophageal and transthoracic echocardiography and were calculated as follows: (Dmax-Dmin) / Dmax for ¿SVC and (Dmax-Dmin) / Dmin for ¿IVC where Dmax and Dmin are the maximal or minimal diameter of SVC and IVC. Measurements were performed at baseline and after a 7 ml/kg volume expansion using a plasma expander. Patients were separated into responders (increase in cardiac index¿¿¿15%) and non-responders (increase in cardiac index¿<¿15%).ResultsAmong 44 included patients, 26 (59%) patients were responders (R). ¿SVC was significantly more accurate than ¿IVC to predict fluid responsiveness (the area under the ROC curve for ¿SVC and ¿IVC regarding assessment of fluid responsiveness were significantly different (0.74 (95% confidence interval (CI): 0.59 to 0.88) and 0.43 (95% CI: 0.25 to 0.61) respectively with P¿=¿0.012)). No significant correlation between ¿SVC and ¿IVC was found (r¿=¿0.005, P¿=¿0.98). The best threshold value to discriminate R from NR was 29% for ¿SVC with a 54% sensitivity and 89% specificity, and 21% for ¿IVC with a 38% sensitivity and 61% specificity.Conclusions¿SVC was better in predicting fluid responsiveness than ¿IVC in our cohort. It is worth noting that the sensitivity and specificity of ¿SVC and ¿IVC to predict fluid responsiveness were lower than those reported in the literature, highlighting the limits of using these indices in a heterogeneous sample of medical and surgical septic patients. PMID:25189403

Charbonneau, Hélène; Riu, Béatrice; Faron, Matthieu; Mari, Arnaud; Kurrek, Matt M; Ruiz, Jean; Geeraerts, Thomas; Fourcade, Olivier; Genestal, Michèle; Silva, Stein

2014-09-01

41

Low superior vena cava flow and intraventricular haemorrhage in preterm infants  

PubMed Central

OBJECTIVES—To document the incidence, timing, degree, and associations of systemic hypoperfusion in the preterm infant and to explore the temporal relation between low systemic blood flow and the development of intraventricular haemorrhage (IVH).?STUDY DESIGN—126 babies born before 30 weeks' gestation (mean 27 weeks, mean body weight 991 g) were studied with Doppler echocardiography and cerebral ultrasound at 5, 12, 24, and 48 hours of age. Superior vena cava (SVC) flow was assessed by Doppler echocardiography as the primary measure of systemic blood flow returning from the upper body and brain. Other measures included colour Doppler diameters of ductal and atrial shunts, as well as Doppler assessment of shunt direction and velocity, and right and left ventricular outputs. Upper body vascular resistance was calculated from mean blood pressure and SVC flow.?RESULTS—SVC flow below the range recorded in well preterm babies was common in the first 24 hours (48 (38%) babies), becoming significantly less common by 48 hours (6 (5%) babies). These low flows were significantly associated with lower gestation, higher upper body vascular resistance, larger diameter ductal shunts, and higher mean airway pressure. Babies whose mothers had received antihypertensives had significantly higher SVC flow during the first 24 hours. Early IVH was already present in 9 babies at 5 hours of age. Normal SVC flows were seen in these babies except in 3 with IVH, which later extended, who all had SVC flow below the normal range at 5 and/or 12 hours. Eight of these 9 babies were delivered vaginally. Late IVH developed in 18 babies. 13 of 14 babies with grade 2to 4 IVH had SVC flow below the normal range before development of an IVH. Two of 4 babies with grade 1 IVH also had SVC flow below the normal range before developing IVH, and the other 2had SVC flow in the low normal range. In all, IVH was first seen after the SVC flow had improved, and the grade of IVH related significantly to the severity and duration of low SVC flow. The 9 babies who had SVC flow below the normal range and did not develop IVH or periventricular leucomalacia were considerably more mature (median gestation 28 v 25weeks).?CONCLUSIONS—Low SVC flow may result from an immature myocardium struggling to adapt to increased extrauterine vascular resistances. Critically low flow occurs when this is compounded by high mean airway pressure and large ductal shunts out of the systemic circulation. Late IVH is strongly associated with these low flow states and occurs as perfusion improves.? PMID:10794784

Kluckow, M.; Evans, N.

2000-01-01

42

Seminomatous Extragonadal Germ Cell Tumor with Complete Obstruction of the Superior Vena Cava Responding to Intensive Chemotherapy  

PubMed Central

A 20-year-old man was admitted to our hospital with persistent cough and dyspnea. He had bilateral distention of the jugular veins, and swollen lymph nodes were palpable in the right subclavicular region. Plain X-ray and computed tomography (CT) of the chest showed a solid soft tissue mass in the upper mediastinum, with leftward displacement of the trachea and complete obstruction of the superior vena cava. Mediastinal radiotherapy (1.8 Gy/day) and methylprednisolone (100 mg/day) were started immediately. Biopsy of the right subclavicular lymph nodes revealed metastatic seminoma. The patient was referred for chemotherapy, which was performed with a combination of cisplatin, bleomycin and etoposide (BEP). A partial response was observed after completion of 3 cycles of chemotherapy, but there was no further tumor shrinkage after additional salvage chemotherapy. The patient is being followed up on an outpatient basis and has been free of recurrence for 32 months after intensive treatment.

Moritoki, Yoshinobu; Kato, Toshiki; Nishio, Hidenori; Kamisawa, Hideyuki; Hirose, Yasuhiko; Ando, Ryosuke; Akita, Hidetoshi; Okamura, Takehiko

2011-01-01

43

Surgical management of superior vena cava syndrome following pacemaker lead infection: a case report and review of the literature.  

PubMed

Superior vena cava (SVC) syndrome is a known but rare complication of pacemaker lead implantation, accounting for approximately less than 0.5% of cases. Its pathophysiology is due to either infection or endothelial mechanical stress, causing inflammation and fibrosis leading to thrombosis, and therefore stenosis of the SVC. Due to the various risks including thrombo-embolic complications and the need to provide symptomatic relief, medical and surgical interventions are sought early. We present the case of a 48-year Caucasian male who presented with localised swelling and pain at the site of pacemaker implantation. Inflammatory markers were normal, but diagnostic imaging revealed three masses along the pacemaker lead passage. A surgical approach using cardiopulmonary bypass and circulatory arrest was used to remove the vegetations. Culture from the vegetations showed Staphylococcus epidermidis. The technique presented here allowed for safe and effective removal of both the thrombus and infected pacing leads, with excellent exposure and minimal post-procedure complications. PMID:24947452

Kokotsakis, John; Chaudhry, Umar A R; Tassopoulos, Dimitris; Harling, Leanne; Ashrafian, Hutan; Vernandos, Michail; Kanakis, Meletis; Athanasiou, Thanos

2014-01-01

44

[Successful resection and repair of the superior vena cava and right atrium in a patient with invasive thymoma].  

PubMed

A 45-year-old female, who suffered from Superior Vena Cava (SVC) syndrome, was diagnosed as invasive thymoma by means of trans-sternal aspiration cytology (TSAC). After preoperative radiotherapy and two courses of neoadjuvant chemotherapy, she underwent radical tumor resection combined with partial resection of both SVC and the right atrium followed by pericardial patch repair under the cardiopulmonary bypass. Complete resection is the most important procedure for the therapy of invasive thymoma, even if the tumor is in advanced stage invading to large vessels such as SVC. As far as our knowledges are concerned, complete resection of invasive thymoma combined with partial resection of the right atrium is very rare. Our case shows that partial resection of the right atrium is not risky operative procedure, if the invaded lesion of the right atrial wall is localized at the antero-lateral side to which the sinus node and the conducting system is not close. And we chose pericardial patch repair for the large defect of SVC. This patch repair was good method in this case because the blood flow through the Azygos vein was well maintained. We would also like to emphasize that TSAC is useful diagnostic procedure for the mediastinal mass lesion to which transcutaneous aspiration using the ultrasound or CT scan as a guide is impossible. PMID:7616035

Kohiyama, R; Hoshino, T; Miyata, M; Yamaguchi, A; Adachi, H; Yamada, S

1995-06-01

45

Percutaneous transluminal angioplasty in a patient with chronic cerebrospinal venous insufficiency and persistent left superior vena cava.  

PubMed

Chronic cerebrospinal venous insufficiency (CCSVI) is a syndrome characterized by stenoses of the internal jugular veins (IJVs) and/or azygos veins and formation of collateral venous channels. A case of a 57-year-old patient with CCSVI in whom the venous outflow from the left IJV to the right atrium occurred through a venous anomaly, the persistent left superior vena cava (PLSVC), is reported. PLSVC is caused by persistence of the left anterior cardinal vein that drains blood from the limb effluent from the left and the left side of head and neck into coronary sinus (Type a), or in the left atrium (Type b). PLSVC can be associated either with innominate vein hypoplasia or other congenital heart abnormalities. Because of evidence of left innominate vein hypoplasia, angioplasty was not performed using the ordinary route but passing with the balloon directly through the PLSVC up to the left IJV. Finally, angioplasty was carried out in a standard manner in the right IJV as well as in the azygous vein. Confirmation angiogram revealed complete reopening of all treated vessels with no evidence of peri- and postoperative complications. The patient was discharged home the following day in good general conditions. PLSVC is a rare congenital vein anomaly but in case of concomitant innominate vein hypoplasia may prove to be a valuable alternative to treat patients with IJV diseases. PMID:23155131

Lupattelli, T; Benassi, F; Righi, E; Bavera, P; Bellagamba, G

2014-04-01

46

The Incidental Finding of a Persistent Left Superior Vena Cava: Implications for Primary Care Providers—Case and Review  

PubMed Central

Persistent left superior vena cava (PLSVC) is the most common thoracic venous anomaly and is a persistent congenital remnant of the vena caval system from early cardiac development. Patients with congenital anomalous venous return are at increased risk of developing various cardiac arrhythmias, due to derangement of embryologic conductive tissue during the early development of the heart. Previously this discovery was commonly made during the placement of pacemakers or defibrillators for the treatment of the arrhythmias, when the operator encountered difficulty with proper lead deployment. However, in today's world of various easily obtainable imaging modalities, PLSVC is being discovered more and more by primary care providers during routine testing or screening for other ailments. Given the known association between anomalous venous return and the propensity for cardiac arrhythmias, we review the embryology of PLSVC and the mechanisms by which it leads to conduction abnormalities. We also provide the practitioner with recommendations for certain baseline cardiac observations and suggestions for proper surveillance in hopes that better understanding will reduce unnecessary and potentially harmful testing, premature subspecialty referral, and unneeded patient anxiety. PMID:25632278

Morgan, Loren Garrison; Gardner, Jonathan

2015-01-01

47

Successful treatment of central venous catheter induced superior vena cava syndrome with ultrasound accelerated catheter-directed thrombolysis.  

PubMed

Superior vena cava (SVC) syndrome results from obstruction of flow through the vessel either by external compression or thrombosis. External compression by intrathoracic neoplasms is the most common etiology, especially lung cancer and lymphoma. Thrombosis is becoming increasingly common due to the use of indwelling catheters and implantable central venous access devices. Most patients are unresponsive to anticoagulation alone which appears to be effective only in the mildest cases. However, recent advances in catheter-based interventions have led to the development of a variety of minimally invasive endovascular strategies to remove venous thrombus and accepted as an important first-line treatment given its high overall success rate and low morbidity as compared with medical and surgical treatments. Ultrasound accelerated catheter-directed thrombolysis (UACDT) has been developed to rapidly and completely resolve the existing thrombus. This technique integrates high frequency, low intensity ultrasound (US) with standard CDT in order to accelerate clot dissolution, reducing treatment time and the incidence of thrombolysis-related complications. An US wave enhances drug permeation through thrombus by disaggregating the fibrin matrix, exposing additional plasminogen receptor sites to the thrombolytic agent. The US energy affects thrombus in the entire venous segment, increasing the probability of complete thrombus clearing. We report the case of a 56-year-old man who presented with a 5 days history of SVC syndrome symptoms who had been receiving chemotherapy for colon cancer through a right subclavian vein port catheter. The patient successfully treated with UACDT with EkoSonic(®) Mach4e Endovascular device with an overnight infusion. © 2013 Wiley Periodicals, Inc. PMID:23404752

Dumantepe, Mert; Tarhan, Arif; Ozler, Azmi

2013-06-01

48

Management of a small bowel transplant with complicated central venous access in a patient with asymptomatic superior and inferior vena cava obstruction.  

PubMed

During the past few years, small bowel transplantation (SBT) has become a realistic alternative for patients with irreversible intestinal failure who have or will develop severe complications from total parenteral nutrition (TPN). Transplantation can be associated with large fluid shifts and massive blood loss necessitating rapid infusions of large quantities of crystalloid and/or blood products. Invasive monitoring and large-bore venous access are necessary in order to manage these patients intraoperatively. Because patients with irreversible intestinal failure are often managed with total parenteral nutrition via a central venous catheter, thrombotic intraluminal obstruction of major vessels may develop over time. Additionally, this may lead to superior vena cava (SVC) syndrome as well as challenging problems with vascular access. We present a 34-year-old woman with a past medical history for long-standing Crohn's disease with multiple small bowel resections and short gut syndrome who presented for an SBT. The patient had a long history of TPN use, complicated by SVC syndrome and inferior vena cava (IVC) obstruction. She was presently asymptomatic from her SVC obstruction. Central venous access was obtained by an interventional radiologist. A 7-French double-lumen Hickman minicatheter was placed in the left femoral vein with the tip of the catheter positioned just distal to the IVC narrowing. A left radial 20-gauge arterial line was placed for hemodynamic monitoring and frequent blood sampling. The patient's left and right dorsal-saphenous veins were cannulated with 16-guage catheters and adequate flow was observed. Lower extremity pressure was measured via the Hickman catheter in the left femoral vein. A multiplane transesophageal echo was used to assess ventricular volume. The options and intraoperative management of such patients are discussed. PMID:15050169

Mims, T T; Fishbein, T M; Feierman, D E

2004-03-01

49

A false aneurysm with an aorto-superior vena cava fistula after replacement of the ascending aorta: report of a case.  

PubMed

A 58-year-old female presenting with congestive heart failure due to a fistula between an aortic false aneurysm and the superior vena cava (SVC) is described. She had a history of Takayasu's arteritis (TA) and she had undergone aortic valve and ascending aorta replacement and coronary artery bypass grafting 6 years before. The false aneurysm had occurred 1 year after the surgery, and she had been conservatively managed. The operation revealed that the cause of the false aneurysm was the detachment of the two proximal saphenous vein anastomoses to the ascending aortic graft. After the surgery, the patient made an uneventful recovery. A false aneurysm of the ascending aorta is one of the most serious complications after replacement of the ascending aorta for patients with TA (Miyata et al. in J Vasc Surg 27:438-445, 1998). We herein present the exceptional case of a fistula between an aortic false aneurysm and the SVC that occurred after ascending aorta graft replacement. PMID:24197671

Iwaki, Ryuma; Nakagiri, Keitaro; Morimoto, Naoto; Murakami, Hirohisa; Honda, Tasuku; Yoshida, Masato; Mukohara, Nobuhiko

2014-12-01

50

Large congenital coronary arteriovenous fistula between the left main coronary artery and right superior vena cava, associated with aneurysmal dilatation of the left main coronary artery: rare case report.  

PubMed

Coronary arteriovenous fistula is an uncommon clinical entity. The right coronary artery is the most common site of origin, and the fistula commonly drains into the right-sided cardiac chambers. Very rarely it can arise from the left main coronary artery, and fistulas draining into the superior vena cavity are extremely rare. We report a 12-year-old asymptomatic boy with a large coronary arteriovenous fistula between the left main coronary artery and superior vena cava, with aneurysmal dilatation of the left main coronary artery. As the fistula was very large and to prevent its complications, it was planned to close the fistula percutaneously. PMID:25022527

Chandra, Naveen; Sarkar, Achyut; Pande, Arindam

2015-01-01

51

Follow-up Results of 71 Patients Undergoing Metallic Stent Placement for the Treatment of a Malignant Obstruction of the Superior Vena Cava  

SciTech Connect

Purpose. To retrospectively clarify the utility of metallic stent placement for the treatment of the malignant obstruction of the superior vena cava (SVC) in 71 patients with VC syndrome (SVCS) on the basis of long-term follow-up data. Materials and Methods. Seventy-one patients underwent stent placement and were followed until death. The applicability of the spiral Z-stent (S-Z-stent) mainly used the initial and follow-up results, stent placement for bilateral BCV obstruction and the value of concurrent anticancer therapy were studied. Results. The technical success rate was 100%, the initial clinical success rate was 87% (62/71), the primary clinical patency rate was 88% (57/65), and the secondary clinical patency rate was 95% (62/65). The obstruction rate of the stent was 12% (8/65), and an additional stent was useful for relief of recurrent SVCS. Survival of 57 patients in whom there was no recurrence of SVCS until death ranged from 1 week to 29 months (mean, 5.4 months and the S-Z-stent appeared to be suitable for the treatment of the malignant obstruction of SVC. Unilateral stent placement was effective for relief of SVCS with bilateral BCV obstruction. Patients who received concurrent anticancer therapy survived 2 months longer than those who did not. Conclusion. Stent placement is an effective treatment for SVCS. Further, the utility of S-Z-stent for SVCS, an additional stent for recurrence, unilateral stent for patients with bilateral BCV obstruction, and anticancer therapy after stent placement were verified.

Nagata, Takeshi [Daiyukai General Hospital, Department of Radiology and Interventional Center (Japan)], E-mail: t-nagata@remus.dti.ne.jp; Makutani, Shiro [Nara Medical University, Department of Radiology and Radiation Oncology (Japan); Uchida, Hideo [Daiyukai General Hospital, Department of Radiology and Interventional Center (Japan); Kichikawa, Kimihiko [Nara Medical University, Department of Radiology and Radiation Oncology (Japan); Maeda, Munehiro [Aizenbashi Hospital, Department of Radiology (Japan); Yoshioka, Tetsuya [Nara Prefecture Hospital, Department of Radiology (Japan); Anai, Hiroshi; Sakaguchi, Hiroshi; Yoshimura, Hitoshi [Nara Medical University, Department of Radiology and Radiation Oncology (Japan)

2007-09-15

52

Double-lumen catheter in the right jugular vein induces two sub-endothelial abscesses in an unusual place, the transition between the superior vena cava and the right atrium: a case report  

PubMed Central

Endocarditis is a type of infection that is common in internal medicine wards and in haemodialysis clinics. The location that is most affected are the heart valves. Herein, we report a case of an uncommon abscess, a sub-endothelial abscess between the transition of the superior vena cava and the right atrium. There were several emboli to the lung and foot, and the agent was related to Staphylococcus aureus and a double-lumen catheter. Usually, this type of abscess is located in valves, either the tricuspid valve if related to catheters or injection drug use or the mitral valve if related to other causes. An exhaustive review was made, but we found no information about the location of this abscess and the rarity of the event motivating the report of infection. PMID:25110520

2014-01-01

53

Double-lumen catheter in the right jugular vein induces two sub-endothelial abscesses in an unusual place, the transition between the superior vena cava and the right atrium: a case report.  

PubMed

Endocarditis is a type of infection that is common in internal medicine wards and in haemodialysis clinics. The location that is most affected are the heart valves. Herein, we report a case of an uncommon abscess, a sub-endothelial abscess between the transition of the superior vena cava and the right atrium. There were several emboli to the lung and foot, and the agent was related to Staphylococcus aureus and a double-lumen catheter. Usually, this type of abscess is located in valves, either the tricuspid valve if related to catheters or injection drug use or the mitral valve if related to other causes. An exhaustive review was made, but we found no information about the location of this abscess and the rarity of the event motivating the report of infection. PMID:25110520

Lima, João Kennedy Teixeira; Lima, Sylvia Rannyelle Teixeira; de Lima, Antonio Leonel; Agra, Cícero Valdizébio Pereira; Valenti, Vitor Engrácia; Gomes, Rayana Loch; Rodrigues, Luciano Miller; Correa, João Antonio; Raimundo, Rodrigo D; de Abreu, Luiz Carlos

2014-01-01

54

Malignant thrombosis of the superior vena cava caused by non-small-cell lung cancer treated with radiation and erlotinib: a case with complete and prolonged response over 3 years  

PubMed Central

Most cases of superior vena cava (SVC) syndrome resulting from neoplasm, especially from lung cancer, remain a serious challenge to treat. Here, for the first time as far as we are aware, we report the case of a non-small-cell lung cancer patient with a massive SVC malignant thrombosis who was treated with thoracic irradiation and erlotinib. The treatment regimen consisted of erlotinib 150 mg/day and a total dose of 66 Gy/33 fractions delivered to the tumor, malignant thrombosis, and metastasis mediastinal lymph nodes. The malignant thrombosis responded dramatically and the combined regimen was well tolerated. After discharge, the erlotinib was prescribed as maintenance therapy. The patient was followed closely for the next 3 years. During this time, positron emission tomography/computed tomography scans and serum tumor marker screens were undertaken. By 6 months, the primary tumor showed complete response and by 9 months, the SVC thrombosis had disappeared. No sign of relapse has been found to date. PMID:23836987

Wang, Jianyang; Liang, Jun; Wang, Wenqing; Ouyang, Han; Wang, Luhua

2013-01-01

55

A Gestão Estratégica das Instituições de Ensino Superior: uma contribuição ao melhor desempenho no caso brasileiro  

Microsoft Academic Search

Resumo: O crescimento no número de instituições de Ensino Superior no Brasil tem provocado inadequações, decorrentes da má gestão e do baixo comprometimento em relação à qualidade do processo educacional. O não alinhamento da educação superior com políticas de desenvolvimento e a falta de uma efetiva regulamentação institucional, no atendimento às demandas regionais, representam uma grave dispersão de esforços e

Alfredo Colenci Júnior; Ana Lúcia Spigolon; Marco Anselmo de Godoi; Maria Elizete Luz Sáes

56

Complications following cava catheterization.  

PubMed

The employment of cava catheterization in intensive care and emergency-treatment has dramatically increased. On the basis of our patients in the Surgical Clinics of the RWTH Aachen risks and complications of the central venous catheterization are explained. Six hundred and eighty-four cases have been examined--categorized according to the method of insertion and according to the technique. In a small randomized study, 60 cava catheters were individually examined bacteriologically. PMID:899567

Raguse, T; Lynen, F K; Schröder, W

1977-01-01

57

Transcatheter Closure of a Patent Ductus Arteriosus in a Patient With an Anomalous Inferior Vena Cava  

Microsoft Academic Search

A patient with a patent ductus arteriosus (PDA) was catheterized for device closure. Anomalous systemic venous drainage was\\u000a found with interrupted inferior vena cava and persistence of hepatic vessel plexus. Using the superior vena cava route, the\\u000a PDA was closed successfully.

A. Akhtar; S. M. Samad; M. Atiq

2010-01-01

58

Reconstruction of the vena cava and of its primary tributaries: a preliminary report.  

PubMed

Encouraged by results from our research laboratory and from recent clinical reports, we performed reconstructions of the vena cava and/or its major tributaries on 16 patients (11 males and five females). Ages ranged from 8 to 81 years (median, 38 years). Eight patients had superior vena cava syndrome (benign, six; malignant, two). Two other patients had membranous occlusion of the inferior vena cava; four had iliocaval venous thrombosis; one had excision of the iliac veins for pelvic neurilemmoma; and one had inferior vena cava injury during orthotopic liver transplantation. The superior vena cava was reconstructed with spiral saphenous vein grafts in five patients and with expanded polytetrafluoroethylene in three. One spiral saphenous vein graft and one expanded polytetrafluoroethylene graft required revision; seven of the eight grafts were patent at follow-up, but one bifurcated spiral saphenous vein graft occluded at 3 months. The inferior vena cava and its tributaries were reconstructed with expanded polytetrafluoroethylene in five patients, spiral saphenous vein graft in two, and Dacron in one. At follow-up four of the expanded polytetrafluoroethylene grafts were patent. In contrast, one of the spiral saphenous vein grafts was occluded, and results of imaging studies of the other were inconclusive. Three of the five expanded polytetrafluoroethylene grafts had a concomitant temporary arteriovenous fistula at the groin; two had documented patency at follow-up. At the present time, spiral saphenous vein graft is our first choice for superior vena cava replacement. However, expanded polytetrafluoroethylene grafts are good alternatives and in the abdomen appear to perform better than spiral saphenous vein graft. These clinical results encourage us to perform further caval grafting in selected patients. PMID:2313826

Gloviczki, P; Pairolero, P C; Cherry, K J; Hallett, J W

1990-03-01

59

Hepatic Veins and Inferior Vena Cava Thrombosis in a Child Treated by Transjugular Intrahepatic Portosystemic Shunt  

SciTech Connect

We report the case of a 9-year-old boy with portal hypertension, due to Budd-Chiari syndrome, and retrohepatic inferior vena cava thrombosis, submitted to a transjugular intrahepatic portosystemic shunt (TIPS) by connecting the suprahepatic segment of the inferior vena cava directly to the portal vein. After 3 months, the withdrawal of anticoagulants promoted the thrombosis of the TIPS. At TIPS revision, thrombosis of the TIPS and the main portal vein and clots at the splenic and the superior mesenteric veins were found. Successful angiography treatment was performed by thrombolysis and balloon angioplasty of a severe stenosis at the distal edge of the stent.

Carnevale, Francisco Cesar, E-mail: fcarnevale@uol.com.br; Santos, Aline Cristine Barbosa [Sao Paulo University Medical School, Interventional Radiology Unit, Radiology Institute, Hospital das Clinicas (Brazil); Tannuri, Uenis [Sao Paulo University Medical School, Liver Transplantation Unit, Children's Institute, Hospital das Clinicas (Brazil); Cerri, Giovanni Guido [Sao Paulo University Medical School, Interventional Radiology Unit, Radiology Institute, Hospital das Clinicas (Brazil)

2010-06-15

60

Thrombotic superior vena caval obstruction after repair of tetralogy of Fallot.  

PubMed Central

A case of tetralogy of Fallot is described, in which thrombotic obstruction of the superior vena cava developed after total correction. Partial thrombolysis was achieved with streptokinase therapy. Images PMID:594946

Mearns, A J; Davies, J A; Hoggard, C A; Watson, D A

1977-01-01

61

21 CFR 870.3260 - Vena cava clip.  

Code of Federal Regulations, 2013 CFR

...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Prosthetic Devices § 870.3260 Vena cava clip. (a) Identification. A vena cava...

2013-04-01

62

21 CFR 870.3260 - Vena cava clip.  

...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Prosthetic Devices § 870.3260 Vena cava clip. (a) Identification. A vena cava...

2014-04-01

63

Vena Cava ?nvasion by Adrenal Leiomyosarcoma  

PubMed Central

Primary adrenal mesenchymal tumors are extremely rare. These tumors are hard to diagnose, and similar to certain adrenal tumors, as they do not produce hormones, and they can only manifest themselves when the tumor reaches an advanced size. These tumors are generally detected incidentally. This study reports a rare case of primary leiomyosarcoma of the right adrenal gland with vena cava invasion, in a 70-year-old woman who presented with right flank pain. Computerized tomography showed an adrenal mass with a diameter of 78 mm, which exerted pressure on the vena cava inferior. The invasive part was excised by using adrenalectomy and cavatomy. Tumor invasion was determined on the wall of the vena cava. Histopathological examination on 10× magnification showed 8-10 mitotic events. Immunohistochemical staining showed that the cells were SMA (+), desmin (+), cytokeratin (-), and Bcl-2 (-). The Ki67 proliferation index was 70%. Widespread metastasis developed six months after the adrenalectomy. PMID:25002946

Öztürk, Hakan

2014-01-01

64

Vena Cava ?nvasion by Adrenal Leiomyosarcoma.  

PubMed

Primary adrenal mesenchymal tumors are extremely rare. These tumors are hard to diagnose, and similar to certain adrenal tumors, as they do not produce hormones, and they can only manifest themselves when the tumor reaches an advanced size. These tumors are generally detected incidentally. This study reports a rare case of primary leiomyosarcoma of the right adrenal gland with vena cava invasion, in a 70-year-old woman who presented with right flank pain. Computerized tomography showed an adrenal mass with a diameter of 78 mm, which exerted pressure on the vena cava inferior. The invasive part was excised by using adrenalectomy and cavatomy. Tumor invasion was determined on the wall of the vena cava. Histopathological examination on 10× magnification showed 8-10 mitotic events. Immunohistochemical staining showed that the cells were SMA (+), desmin (+), cytokeratin (-), and Bcl-2 (-). The Ki67 proliferation index was 70%. Widespread metastasis developed six months after the adrenalectomy. PMID:25002946

Oztürk, Hakan

2014-05-13

65

Multiplanar imaging of inferior vena cava variants.  

PubMed

Inferior vena cava (IVC) variants are rare and are usually detected incidentally. Even though, these variants are by themselves asymptomatic, they can have important clinical, radiological, and surgical implications. In this pictorial essay, we sensitize the reader to various IVC variants by presenting reports of actual patients. A succinct description of the embryological development of these anatomic variants is also provided. PMID:24981147

Awais, Muhammad; Rehman, Abdul; Baloch, Noor Ul-Ain; Salam, Basit

2015-01-01

66

In Vitro Studies of Temporary Vena Cava Filters  

SciTech Connect

Purpose: To evaluate the clot trapping capacity of different temporary vena cava filters in a vena cava model. Methods: A vena cava flow model was built using PVC tubing, a hemodialysis membrane and a pulsatile pump. Blood was imitated by a Dextran 40 solution. Five different temporary vena cava filters and two prototypes were tested using human thrombi. The mechanism of clot capture was observed. Results: Decreasing rank order according to decreasing percentage of clots captured for the 21-mm diameter vena cava model was Cook (C) > Angiocor (A) > Cordis (CD) > Antheor (TF-6) > DIL for thrombi with a diameter of 3 mm and A > C > CD > TF-6 > DIL for 5-mm thrombi. In a cava with diameter of 28 mm, decreasing rank order was C > CD = A > TF-6 > DIL and C > CD = A > DIL > TF-6 for 3- and 5-mm thrombi, respectively. Two new prototypes, the TF-8 and TF-10 filters, achieved better results than the TF-6 filter and were in most conditions comparable to the A and CD filters. In most cases, thrombi were trapped between filter and cava wall. Conclusion: The vena cava flow model demonstrates significant differences in rates of clot capture (range 22%-98%) depending on cava diameter, thrombus size, and filter type.

Lorch, Heike; Zwaan, Martin; Kulke, Christian; Weiss, Hans-Dieter [Department of Radiology, Medical University of Luebeck, Ratzeburger Allee 160, D-23538 Luebeck (Germany)

1998-03-15

67

Discrepancy between inferior vena cava and right atrial oxygen saturations as a sign of ischemia in the mesenteric circulation.  

PubMed

We describe the case of a 72-year-old patient admitted to intensive care following abdominal surgery. Venous oxygen saturations from the right atrium and superior vena cava (SVC) showed large variation due to ongoing ischemia in the mesentric circulation. If trends in venous oxygen saturation are to be followed, serial samples must be taken from the same central venous catheter (CVC) port. PMID:18725041

Lyons, Kristopher S; Strange, John; Clarke, Robert C N

2008-09-01

68

Computational Modeling of Blood Flow in the TrapEase Inferior Vena Cava Filter  

SciTech Connect

To evaluate the flow hemodynamics of the TrapEase vena cava filter using three dimensional computational fluid dynamics, including simulated thrombi of multiple shapes, sizes, and trapping positions. The study was performed to identify potential areas of recirculation and stagnation and areas in which trapped thrombi may influence intrafilter thrombosis. Computer models of the TrapEase filter, thrombi (volumes ranging from 0.25mL to 2mL, 3 different shapes), and a 23mm diameter cava were constructed. The hemodynamics of steady-state flow at Reynolds number 600 was examined for the unoccluded and partially occluded filter. Axial velocity contours and wall shear stresses were computed. Flow in the unoccluded TrapEase filter experienced minimal disruption, except near the superior and inferior tips where low velocity flow was observed. For spherical thrombi in the superior trapping position, stagnant and recirculating flow was observed downstream of the thrombus; the volume of stagnant flow and the peak wall shear stress increased monotonically with thrombus volume. For inferiorly trapped spherical thrombi, marked disruption to the flow was observed along the cava wall ipsilateral to the thrombus and in the interior of the filter. Spherically shaped thrombus produced a lower peak wall shear stress than conically shaped thrombus and a larger peak stress than ellipsoidal thrombus. We have designed and constructed a computer model of the flow hemodynamics of the TrapEase IVC filter with varying shapes, sizes, and positions of thrombi. The computer model offers several advantages over in vitro techniques including: improved resolution, ease of evaluating different thrombus sizes and shapes, and easy adaptation for new filter designs and flow parameters. Results from the model also support a previously reported finding from photochromic experiments that suggest the inferior trapping position of the TrapEase IVC filter leads to an intra-filter region of recirculating/stagnant flow with very low shear stress that may be thrombogenic.

Singer, M A; Henshaw, W D; Wang, S L

2008-02-04

69

A new design of the retrievable vena cava filter.  

PubMed

Retrievable vena cava filters are invented to minimize surgical traumas to patients. However, in reality the deployed filter may firmly adhere to the vena cava due to tissue in-growth into the filter, which will breach the original concept of retrieving the filter by minimal invasive surgery. We hypothesize that if we can invent a filter with a part of supporting feet that is made of biodegradable materials and can be detached from the main body of the filter during the filter retrieval, the retrieval damage problem to the vena cava might be solved. PMID:22922057

Chen, Zengsheng; Zhang, Xiwen; Deng, Xiaoyan

2012-11-01

70

BANDO DI PARTECIPAZIONE al PREMIO TESI "ADRIANA CAVA" Adriana Cava Jazz Ballet in collaborazione con il DAMS di Torino, in occasione del  

E-print Network

BANDO DI PARTECIPAZIONE al PREMIO TESI "ADRIANA CAVA" Adriana Cava Jazz Ballet in collaborazione territorio nazionale, per celebrare l'attività della scuola e della compagnia di danza jazz di Adriana Cava danzatori jazz e per la divulgazione di un genere di danza e di spettacolo fra i più conosciuti e diffusi

Di Pillo, Gianni

71

The North Atlantic Oscillation affects the quality of Cava (Spanish sparkling wine).  

PubMed

This study explores the possible effects of the North Atlantic Oscillation (NAO) on the quality of Spanish Cava. We found a significant negative relationship between the mean NAO for the months of March through August of each year between 1970 and 2008 and the probability of obtaining a top quality Cava. The NAO is associated with temperature and rainfall variations in the Cava region, which affect vine physiological processes during grape maturity. The probability of obtaining a top quality Cava was highest when the mean value of the NAO was negative, which causes the mean temperature in the Cava area to decrease, with positive consequences on Cava quality. Although the overall discrimination capacity and explanatory power of the model were low, 80% of clearly favorable years were classified correctly as corresponding to top quality Cava, and 70% of clearly unfavorable years were classified correctly as non top quality Cava. PMID:22825404

Real, Raimundo; Báez, José Carlos

2013-05-01

72

The North Atlantic Oscillation affects the quality of Cava (Spanish sparkling wine)  

NASA Astrophysics Data System (ADS)

This study explores the possible effects of the North Atlantic Oscillation (NAO) on the quality of Spanish Cava. We found a significant negative relationship between the mean NAO for the months of March through August of each year between 1970 and 2008 and the probability of obtaining a top quality Cava. The NAO is associated with temperature and rainfall variations in the Cava region, which affect vine physiological processes during grape maturity. The probability of obtaining a top quality Cava was highest when the mean value of the NAO was negative, which causes the mean temperature in the Cava area to decrease, with positive consequences on Cava quality. Although the overall discrimination capacity and explanatory power of the model were low, 80 % of clearly favorable years were classified correctly as corresponding to top quality Cava, and 70 % of clearly unfavorable years were classified correctly as non top quality Cava.

Real, Raimundo; Báez, José Carlos

2013-05-01

73

Leiomyosarcoma of the inferior vena cava.  

PubMed

The purpose of this article is to present the CT features in five cases of pathologically verified Inferior vena cava (IVC) leiomyosarcoma. In this retrospective analysis, we reviewed CT features in 5 cases of clinicopathologically confirmed IVC leiomyosarcoma with respect to its location (infra renal, trans renal, supra renal), its extent (with or without involvement of renal vein, hepatic IVC with or without involvement of hepatic vein, right atrial & extra caval extension) and pattern of enhancement. CT guided biopsy was performed in four patients while the last patient underwent successful resection of the tumor. Three male and two female patients (aged 45 to 72 years) were included in the study. Heterogeneously enhancing retroperitoneal mass involving IVC is the most common imaging feature. The intra and extra luminal extension was demonstrated excellently in all patients. IVC leiomyosarcoma is a rare neoplasm often presenting very late with non-specific symptoms. Cross sectional imaging establishes the exact location and extension and plays a vital role in determining the resectibility and planning the management. PMID:24784870

Naphade, Prashant S; Raut, Abhijit A; Hira, Priya; Vaideeswar, Pradip; Vadeyar, Hemant

2014-05-01

74

Leiomyosarcoma of the inferior vena cava--a case report.  

PubMed

This paper presents a patient successfully treated for leiomyosarcoma of the vena cava, with no recurrence or symptoms on an 8-year follow-up. A 56-year-old woman presented with chronic and progressive periumbilical and right upper abdominal pain. Physical examination and laboratory tests revealed no abnormalities. Computed tomography showed a high-density image inside the vena cava. Cavography showed a filling defect with complete occlusion of the vena cava involving the renal veins and greatly developed collateral circulation through lumbar veins. Laparotomy was performed and a large caval mass involving the renal veins was dissected and resected. Venous reconstruction was undertaken using a 19-mm bovine pericardium prosthesis (Labcor, MG-Brazil) interposed as a substitute to the vena cava, and the renal veins were anastomosed to the side of the graft. Pathologic examination confirmed a leiomyosarcoma with free surgical margins. The postoperative course was uneventful and the patient was discharged on postoperative day 8. The venous flow through the inferior vena became normal, as confirmed by later cavography. This paper presents a case of successfully managed leiomyosarcoma of the vena cava with a thorough review of the literature. The treatment of such patients and the use of bovine pericardium are also discussed. PMID:12799733

Bonamigo, Telmo Pedro; Becker, Monica; Faccini, Felipe Puricelli; Cantisani, Guido Pio Gracco; Pereira, Wagner Michael; de Napoli, Gilberto; de Oliveira Ilha, Darcy

2003-01-01

75

Use of a jugular vein autograft for reconstruction of the cranial vena cava in a dog with invasive thymoma and cranial vena cava syndrome.  

PubMed

A spayed female dog was evaluated because of edema of the ventral cervical region, lethargy, cough, and reduced exercise tolerance. Invasive thymoma and cranial vena cava syndrome were diagnosed by use of ultrasound-guided fine-needle biopsy and contrast-enhanced helical computed tomography. Resection of the cranial vena cava and an autogenous jugular vein graft were used for restoration of normal venous return to the right atrium and alleviation of the cranial vena cava syndrome. PMID:15521441

Holsworth, Ian G; Kyles, Andrew E; Bailiff, Nathan L; Hopper, Kate; Long, Craig; Ilkiw, Jan E

2004-10-15

76

Effect of Dieckol, a Component of Ecklonia cava, on the Promotion of Hair Growth  

PubMed Central

This study was conducted to evaluate the effect of Ecklonia cava, a marine alga native to Jeju Island in Korea, on the promotion of hair growth. When vibrissa follicles were cultured in the presence of E. cava enzymatic extract (which contains more than 35% of dieckol) for 21 days, E. cava enzymatic extract increased hair-fiber length. In addition, after topical application of the 0.5% E. cava enzymatic extract onto the back of C57BL/6 mice, anagen progression of the hair-shaft was induced. The treatment with E. cava enzymatic extract resulted in the proliferation of immortalized vibrissa dermal papilla cells (DPC). Especially, dieckol, among the isolated compounds from the E. cava enzymatic extract, showed activity that increased the proliferation of DPC. When NIH3T3 fibroblasts were treated with the E. cava enzymatic extract and the isolated compounds from the E. cava enzymatic extract, the E. cava enzymatic extract increased the proliferation of NIH3T3 fibroblasts, but the isolated compounds such as eckol, dieckol, phloroglucinol and triphlorethol-A did not affect the proliferation of NIH3T3 fibroblasts. On the other hand, the E. cava enzymatic extract and dieckol significantly inhibited 5?-reductase activity. These results suggest that dieckol from E. cava can stimulate hair growth by the proliferation of DPC and/or the inhibition of 5?-reductase activity. PMID:22754373

Kang, Jung-Il; Kim, Sang-Cheol; Kim, Min-Kyoung; Boo, Hye-Jin; Jeon, You-Jin; Koh, Young-Sang; Yoo, Eun-Sook; Kang, Sung-Myung; Kang, Hee-Kyoung

2012-01-01

77

Rekonstruktion der Vena cava inferior zur erweiterten Resektion maligner Tumoren  

Microsoft Academic Search

Objectives. Malignant tumor invasion in the inferior vena cava (IVC) has for a long time been the limiting factor in the resection of retroperitoneal tumors. The clinical outcome in these patients depends on vascular surgical techniques, the central role of which is played by IVC reconstruction. Methods. Within the last 7 years, 9,085 vascular reconstructive procedures were performed in our

D. Grotemeyer; M. Pillny; B. Luther; V. Müller-Mattheis; S. Ernst; W. Sandmann

2003-01-01

78

Laceration of the inferior vena cava of angiographic demonstration  

SciTech Connect

Laceration of the inferior vena cava (IVC) often presents as an acute surgical emergency requiring immediate operative intervention. We show that when the patient's clinical condition permits, angiography may delineate the site of caval laceration and active hemorrhage, and identify associated arterial injuries. Contrast extravasation from the IVC also is reported for the first time.

Sclafani, S.J.A.; Gordon, D.H.; Mitchell, W.

1983-08-01

79

Low superior vena cava flow and intraventricular haemorrhage in preterm infants  

Microsoft Academic Search

OBJECTIVESTo document the incidence, timing, degree, and associations of systemic hypoperfusion in the preterm infant and to explore the temporal relation between low systemic blood flow and the development of intraventricular haemorrhage (IVH).STUDY DESIGN126 babies born before 30 weeks' gestation (mean 27 weeks, mean body weight 991 g) were studied with Doppler echocardiography and cerebral ultrasound at 5, 12, 24,

Martin Kluckow; Nick Evans

2000-01-01

80

Inferior Vena Cava Anomaly: A Risk for Deep Vein Thrombosis  

PubMed Central

Context: Inferior vena cava (IVC) anomalies have a 0.5% incidence rate and could be associated with other congenital abnormalities. In later stage of the disease, trophic ulcers with or without deep vein thrombosis (DVT) is consistent finding. Case Report: A 29-year-old male patient presented with recurrent lower extremity ulcers. Further workup revealed an absent infrahepatic inferior vena cava, prominently dilated azygos and hemiazygos veins with enlarged retroperitoneal collaterals without DVT. Conclusion: IVC anomaly should be suspected in a young patient presenting with unexplained venous thrombosis and recurrent ulcers of a lower extremity. IVC anomaly would inherently lead to blood flow stasis and endothelial injury. Thus per Virchow's triad, other risk factors for hypercoagulability such as physical inactivity, smoking tobacco, oral contraceptive pills should be avoided and when hereditary thrombophilias or other irreversible risk factors are present, lifelong anticoagulation should be considered. PMID:25535612

Sitwala, Puja S; Ladia, Vatsal M; Brahmbhatt, Parag B; Jain, Vinay; Bajaj, Kailash

2014-01-01

81

Modeling Flow Past a Tilted Vena Cava Filter  

SciTech Connect

Inferior vena cava filters are medical devices used to prevent pulmonary embolism (PE) from deep vein thrombosis. In particular, retrievable filters are well-suited for patients who are unresponsive to anticoagulation therapy and whose risk of PE decreased with time. The goal of this work is to use computational fluid dynamics to evaluate the flow past an unoccluded and partially occluded Celect inferior vena cava filter. In particular, the hemodynamic response to thrombus volume and filter tilt is examined, and the results are compared with flow conditions that are known to be thrombogenic. A computer model of the filter inside a model vena cava is constructed using high resolution digital photographs and methods of computer aided design. The models are parameterized using the Overture software framework, and a collection of overlapping grids is constructed to discretize the flow domain. The incompressible Navier-Stokes equations are solved, and the characteristics of the flow (i.e., velocity contours and wall shear stresses) are computed. The volume of stagnant and recirculating flow increases with thrombus volume. In addition, as the filter increases tilt, the cava wall adjacent to the tilted filter is subjected to low velocity flow that gives rise to regions of low wall shear stress. The results demonstrate the ease of IVC filter modeling with the Overture software framework. Flow conditions caused by the tilted Celect filter may elevate the risk of intrafilter thrombosis and facilitate vascular remodeling. This latter condition also increases the risk of penetration and potential incorporation of the hook of the filter into the vena caval wall, thereby complicating filter retrieval. Consequently, severe tilt at the time of filter deployment may warrant early clinical intervention.

Singer, M A; Wang, S L

2009-06-29

82

Upper terminal of the inferior vena cava and development of the heart atriums: a study using human embryos  

PubMed Central

In the embryonic heart, the primitive atrium is considered to receive the bilateral sinus horns including the upper terminal of the inferior vena cava (IVC). To reveal topographical anatomy of the embryonic venous pole of the heart, we examined horizontal serial paraffin sections of 15 human embryos with crown-rump length 9-31 mm, corresponding to a gestational age of 6-7 weeks or Carnegie stage 14-16. The IVC was often fixed to the developing right pulmonary vein by a mesentery-like fibrous tissue. Rather than the terminal portion of the future superior vena cava, the IVC contributed to form a right-sided atrial lumen at the stage. The sinus venosus or its left horn communicated with the IVC in earlier specimens, but in later specimens, the left atrium extended caudally to separate the sinus and IVC. In contrast, the right atrium consistently extended far caudally, even below the sinus horn, along the IVC. A small (or large) attachment between the left (or right) atrium and IVC in adult hearts seemed to be derived from the left (or right) sinus valve. This hypothesis did not contradict with the incorporation theory of the sinus valves into the atrial wall. Variations in topographical anatomy around the IVC, especially of the sinus valves, might not always depend on the stages but partly in individual differences. PMID:25548721

Hwang, Si Eun; Rodríguez-Vázquez, José Francisco; Murakami, Gen; Cho, Baik Hwan

2014-01-01

83

A Giant Mesenteric Desmoid Tumor Revealed by Acute Pulmonary Embolism due to Compression of the Inferior Vena Cava  

PubMed Central

Patient: Male, 69 Final Diagnosis: Mesenteric desmoid tumor Symptoms: — Medication: — Clinical Procedure: — Specialty: Surgery Objective: Rare disease Background: Intra-abdominal fibromatosis is a benign rare tumor of fibrous origin with a significant potential for local invasion and no ability to metastasize, but it can recur. The etiology of desmoid tumors is unknown. It is often associated with conditions such as familial adenomatous polyposis and Gardner syndrome. Case Report: We report the case of a 69-year-old man who presented to our hospital with an acute pulmonary embolism. The patient had a past history of colic surgery for a polyp with a high-grade dysplasia. Pulmonary angiography showed partial occlusion of the right superior lobe artery and partial occlusion of the middle lobe artery. The patient was given thrombolytic therapy. Abdominal computerized tomography revealed a mesenterial giant mass with compression of the inferior vena cava (IVC). A biopsy of the mass, confirming aggressive fibromatosis. A laparotomy was performed, which revealed a massive growth occupying the abdomen and attached to the previous ileocolic anastomosis. One day after surgery, his condition deteriorated. Conclusions: This report underlines the potential of imaging investigations of abdomen and vena cava if pulmonary embolism is suspected, especially when there is no evidence of peripheral venous thrombosis or other predisposing factors. Unfortunately, data on the surgical management of desmoid tumor is scarce. Therefore, the standard of treatment is a surgical resection for resectable tumors. PMID:25180474

Palladino, Elisa; Nsenda, Joseph; Siboni, Renaud; Lechner, Christian

2014-01-01

84

Aneurysm of the abdominal aorta ruptured to the retroperitoneal space and inferior vena cava. Case report.  

PubMed

Case of sixty-six year old male with abdominal aortic aneurysm rupturing into the retroperitoneal space and inferior vena cava is presented because of its rarity. Patient was operated upon with initial success but died probably due to pulmonary embolism with thrombus originating from the inferior vena cava narrowed at surgery. PMID:1842605

Rogowski, J; Landowski, S; Trenkner, M

1991-01-01

85

Hepatic autotransplantation with ex situ neoplasm extirpation and vena cava replacement.  

PubMed

The treatment of a 64-year-old man with a retrohepatic neoplasm deemed not accessible by conventional in situ surgical techniques is presented to illustrate the potential benefit offered by techniques adapted from liver transplantation and vascular surgery. A computed tomography scan performed for uncharacteristic abdominal discomfort revealed a hepatic or retrohepatic tumor compressing the inferior vena cava. Biopsies were interpreted as probably leiomyoma or malignant schwannoma. The liver with neoplasm and retrohepatic inferior vena cava was removed en bloc and taken to the back table where the neoplasm invading the inferior vena cava wall was removed together with the inferior vena cava. The inferior vena cava was then replaced by a 22-mm polytetrafluoroethylene graft and the 3 hepatic veins were reconstructed with anastomoses to this graft. The liver was then autotransplanted by standard transplantation technique. The postoperative course was uneventful and the patient is in good health more than 2 years after surgery. PMID:14696489

Brekke, Inge B; Mathisen, Øystein; Line, Pål-Dag; Hauss, Hans J

2003-01-01

86

Superior limbic keratoconjunctivitis (SLK).  

PubMed

Superior limbic keratoconjunctivitis (SLK) is a disease characterised by inflammation of the upper palpebral and superior bulbar conjunctiva, keratinisation of the superior limbus and corneal and conjunctival filaments. It may be associated with other diseases such as keratoconjunctivitis sicca, hyperthyroidism and hyperparathyroidism. Although its exact aetiology is unknown, a mechanical hypothesis seems most attractive. Treatment is aimed at altering the abnormal mechanical interaction of the upper lid and superior corneal limbus. PMID:2695351

Nelson, J D

1989-01-01

87

Penetration of an Inferior Vena Cava Filter into the Aorta  

PubMed Central

Transvenous placement of inferior vena cava (IVC) filters is commonly performed in selected patients with deep venous thrombosis and pulmonary embolism. However, filter placement is sometimes associated with serious complications. A common complication is asymptomatic perforation of the IVC and penetration of adjacent organs by the filter. Here, we report a case of an 83-year-old man whose prophylactic IVC filter penetrated the aorta. The patient was closely followed without surgical intervention for more than a year, and no additional complications were observed.

Hosaka, Akihiro; Miyahara, Takuya; Hoshina, Katsuyuki; Shigematsu, Kunihiro; Watanabe, Toshiaki

2014-01-01

88

PORCINE VENA CAVA AS AN ALTERNATIVE TO BOVINE PERICARDIUM IN BIOPROSTHETIC PERCUTANEOUS HEART VALVES  

PubMed Central

Percutaneous heart valves are revolutionizing valve replacement surgery by offering a less invasive treatment option for high-risk patient populations who have previously been denied the traditional open chest procedure. Percutaneous valves need to be crimped to accommodate a small-diameter catheter during deployment, and they must then open to the size of heart valve. Thus the material used must be strong and possess elastic recoil for this application. Most percutaneous valves utilize bovine pericardium as a material of choice. One possible method to reduce the device delivery diameter is to utilize a thin, highly elastic tissue. Here we investigated porcine vena cava as an alternative to bovine pericardium for percutaneous valve application. We compared the structural, mechanical, and in vivo properties of porcine vena cava to those of bovine pericardium. While the extracellular matrix fibers of pericardium are randomly oriented, the vena cava contains highly aligned collagen and elastin fibers that impart strength to the vessel in the circumferential direction and elasticity in the longitudinal direction. Moreover, the vena cava contains a greater proportion of elastin, whereas the pericardium matrix is mainly composed of collagen. Due to its high elastin content, the vena cava is significantly less stiff than the pericardium, even after crosslinking with glutaraldehyde. Furthermore, the vena cava’s mechanical compliance is preserved after compression under forces similar to those exerted by a stent, whereas pericardium is significantly stiffened by this process. Bovine pericardium also showed surface cracks observed by scanning electron microscopy after crimping that were not seen in vena cava tissue. Additionally, the vena cava exhibited reduced calcification (46.64 ± 8.15 ?g Ca/mg tissue) as compared to the pericardium (86.79 ± 10.34 ?g/mg). These results suggest that the vena cava may enhance leaflet flexibility, tissue resilience, and tissue integrity in percutaneous heart valves, ultimately reducing the device profile while improving the durability of these valves. PMID:21993239

Munnelly, Amy; Cochrane, Leonard; Leong, Joshua; Vyavahare, Naren

2011-01-01

89

Advanced Techniques for Removal of Retrievable Inferior Vena Cava Filters  

SciTech Connect

Inferior vena cava (IVC) filters have proven valuable for the prevention of primary or recurrent pulmonary embolism in selected patients with or at high risk for venous thromboembolic disease. Their use has become commonplace, and the numbers implanted increase annually. During the last 3 years, in the United States, the percentage of annually placed optional filters, i.e., filters than can remain as permanent filters or potentially be retrieved, has consistently exceeded that of permanent filters. In parallel, the complications of long- or short-term filtration have become increasingly evident to physicians, regulatory agencies, and the public. Most filter removals are uneventful, with a high degree of success. When routine filter-retrieval techniques prove unsuccessful, progressively more advanced tools and skill sets must be used to enhance filter-retrieval success. These techniques should be used with caution to avoid damage to the filter or cava during IVC retrieval. This review describes the complex techniques for filter retrieval, including use of additional snares, guidewires, angioplasty balloons, and mechanical and thermal approaches as well as illustrates their specific application.

Iliescu, Bogdan; Haskal, Ziv J., E-mail: ziv2@mac.com [University of Maryland School of Medicine, Division of Vascular and Interventional Radiology (United States)

2012-08-15

90

Inferior vena cava leiomyosarcoma confirmed by catheter suction biopsy during digital subtraction angiography  

PubMed Central

Leiomyosarcoma of vascular origin is a rare disease and most cases arise in the inferior vena cava. Inferior vena cava leiomyosarcoma (IVCLMS) usually presents in females in their sixth decade of life. The clinical symptoms are often non-specific and the diagnosis is often delayed. Current imaging techniques can accurately differentiate inferior vena cava neoplasms from other non-neoplastic lesions. However, definitive diagnosis of IVCLMS needs histologic evidence. We report a case of IVCLMS in a 61-year old Chinese woman. This is the first IVCLMS case confirmed by catheter suction biopsy during digital subtraction angiography. PMID:25232438

Wei, Ning; Xu, Xiang-Dong; Xu, Hao; Zu, Mao-Heng

2014-01-01

91

[Malignant neoplasms invading into the inferior vena cava. Surgical indications].  

PubMed

Clinical conditions requiring resection and replacement of the inferior vena cava (IVC) are rare and have included tumors, traumatic or iatrogenic injuries. Intraluminal extension or direct mural involvement of the IVC is seen with a variety of tumors: renal cell carcinomas, adrenal cortical tumors, leiomyosarcomas and pheochromocytomas. Surgical treatment requires tumor resection with simultaneous en bloc resection of the involved IVC. Resection of the lower and middle segments of IVC is possible in nearly all cases and surgical reconstruction is generally made with a polytetrafluoroethylene (PTFE) tube graft. Resection at suprahepatic vein level is indicated only rarely: tumor invasion of the suprahepatic veins require liver transplantation. Venous bypasses have lower patency rates than prosthetic replacement because of the low pressure and lower-flow of the venous system. PMID:7609894

Boneschi, M; Miani, S; Erba, M; Giuffrida, G F; Giordanengo, F

1995-03-01

92

[Resection and replacement of the retrohepatic vena cava in partial hepatectomy].  

PubMed

An extended right lobectomy with complete resection of the caudate lobe and the retrohepatic vena cava for the treatment of involving primary malignancy of the liver was performed in two 63- and 66-year-old male patients. Vena cava replacement was secured by a 20 mm inner diameter externally stented polytetrafluoroethylene graft. No postoperative complication was observed, and both patients were alive with patent graft and no sign of recurrence, 20 and 2 months after the operation respectively. Seventeen cases of combined hepatic resection and vena cava replacement have been reported. The review of the literature showed that: these challenging hepatectomies have benefited from liver transplantation techniques; patency of prosthetic vena cava replacement is correct; and prolonged survival can be obtained by such extended hepatic resection. PMID:7899356

Le Treut, Y P; Giudici, P; Betances, L; Berthet, B; Beaussieu, C

1995-01-21

93

Cardiac musculature of the cranial vena cava in the common tree shrew (Tupaia glis).  

PubMed Central

Cardiac musculature of the cranial vena cava in the common tree shrew (Tupaia glis) was examined by light and transmission electron microscopy. The common tree shrew has well developed cardiac myocyte layers in the tunica media of the cranial vena cava, extending from the right atrium to the root of the subclavian vein. Because the common tree shrew belongs to a primitive group of mammals, the occurrence of cardiac musculature in the cranial vena cava may be a common feature in lower mammals. The development of this musculature indicates that active contraction of the cranial vena cava wall occurs in this species. Electron micrographs showed the typical ultrastructure of myocytes and nerve endings. These observations suggest that this musculature may serve as a regulatory pump for the return of venous blood to the right atrium and as a blood reservoir system under conditions of rapid heart rate. Additionally, the presence of atrial natriuretic polypeptide (ANP) was also demonstrated in the myocytes of the vena cava immunohistochemically. These findings show that the cardiac endocrine organ for ANP develops even in the principal veins including the cranial vena cava. Images Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 PMID:7591997

Endo, H; Maeda, S; Kimura, J; Yamada, J; Rerkamnuaychoke, W; Chungsamarnyart, N; Tanigawa, M; Kurohmaru, M; Hayashi, Y; Nishida, T

1995-01-01

94

Management of extensive retrohepatic vena cava defect in recipients of living donor liver transplantation.  

PubMed

Certain complexities, such as extensive vena caval injury, unexpected dense adhesions between liver and retrohepatic vena cava, and liver tumor abutting retrohepatic vena cava, sometimes warrant resection of vena cava during living-donor liver transplantation. Because the donor graft is devoid of vena cava, reconstruction of the retrohepatic cava is required, which can be done with the use of either a cryopreserved venous graft or an artificial conduit. With only a few published reports, the experience in vena cava reconstruction with the use of expanded polytetrafluoroethylene (ePTFE) during living-donor liver transplantation remains limited. We present our experience of 4 patients who successfully underwent vena caval resection during liver transplantation for various indications, which was subsequently reconstructed with the use of ePTFE grafts. All of these patients except 1 recovered well without any undue complications, such as thrombosis or outflow inadequacies, thus proving this extensive surgical treatment to be a successful and life-saving procedure, though meticulous skills are prerequisite. PMID:24767328

Hsu, S-C; Jeng, L-B; Thorat, A; Li, P-C; Poon, K-S; Hsu, C-H; Yeh, C-C; Chen, T-H; Yang, H-R

2014-04-01

95

Individualized Computer-Based Surgical Planning Addressing Pulmonary Arteriovenous Malformations in Single-Ventricle Patients with Interrupted Inferior Vena Cava and Azygous Continuation  

PubMed Central

BACKGROUND Single-ventricle patients with interrupted inferior vena cava (IVC) can develop pulmonary arterio-venous malformations due to abnormal hepatic flow distribution (HFD). However, preoperatively determining the hepatic baffle design that optimizes HFD is far from trivial. In this study, we combine virtual surgery and numerical simulations to identify potential surgical strategies for patients with interrupted IVC. METHODS Five patients with interrupted IVC and severe PAVMs were enrolled. Their in vivo anatomies were reconstructed from MRI (n=4) and CT (n=1), and alternate virtual-surgery options (intra/extra-cardiac, Y-grafts, hepato-to-azygous and azygous-to-hepatic shunts) were generated for each. HFD was assessed for all options using a fully validated computational flow solver. RESULTS For patients with a single superior vena cava (SVC, n=3), intra/extra-cardiac connections proved dangerous, as even a small left or right offset led to a highly preferential HFD to the associated lung. Best results were obtained with either a Y-graft spanning the Kawashima to split the flow, or hepato-to-azygous shunts to promote mixing. For patients with bilateral SVCs (n=2), results depended on the balance between the left and right superior inflows. When those were equal, connecting the hepatic baffle between the SVCs performed well, but other options should be pursued otherwise. CONCLUSION This study demonstrates how virtual-surgery environments can benefit the clinical community, especially for rare and complex cases such as single-ventricle patients with interrupted IVC. Furthermore, the sensitivity of the optimal baffle design to the superior inflows underscores the need to characterize both pre-operative anatomy and flows to identify the best suited option. PMID:21334010

de Zélicourt, Diane A.; Haggerty, Christopher M.; Sundareswaran, Kartik S.; Whited, Brian S.; Rossignac, Jarek R.; Kanter, Kirk R.; Gaynor, J. William; Spray, Thomas L.; Sotiropoulos, Fotis; Fogel, Mark A.; Yoganathan, Ajit P.

2010-01-01

96

The curious case of the disappearing IVC: A case report and review of the aetiology of Inferior Vena Cava Agenesis  

PubMed Central

We report the case of a previously well 18-year-old male who presented to the Emergency Department with lower limb pain. An ultrasound demonstrated extensive left sided deep vein thrombosis and computed tomography demonstrated inferior vena cava agenesis, leading to the diagnosis of inferior vena cava agenesis associated deep vein thrombosis. The aetiology of inferior vena cava agenesis is explored in depth. PMID:24967034

Paddock, Michael; Robson, Nicola

2014-01-01

97

Endovascular management of venous ulcer in a patient with occluded duplicated inferior vena cava and review of inferior vena cava development.  

PubMed

Duplication of inferior vena cava (IVC) is the most common IVC anomaly. We report a successful iliac vein and collateral stenting for venous decompression in a patient with an occluded right femorocaval graft with a duplicated IVC. We also review the literature of embryological development of IVC. PMID:24226789

Verma, Himanshu; Hiremath, Niranjan; George, Robbie K; Tripathi, Ramesh K

2014-02-01

98

Morphofunctional characterization of decellularized vena cava as tissue engineering scaffolds.  

PubMed

Clinical experience for peripheral arterial disease treatment shows poor results when synthetic grafts are used to approach infrapopliteal arterial segments. However, tissue engineering may be an option to yield surrogate biocompatible neovessels. Thus, biological decellularized scaffolds could provide natural tissue architecture to use in tissue engineering, when the absence of ideal autologous veins reduces surgical options. The goal of this study was to evaluate different chemical induced decellularization protocols of the inferior vena cava of rabbits. They were decellularized with Triton X100 (TX100), sodium dodecyl sulfate (SDS) or sodium deoxycholate (DS). Afterwards, we assessed the remaining extracellular matrix (ECM) integrity, residual toxicity and the biomechanical resistance of the scaffolds. Our results showed that TX100 was not effective to remove the cells, while protocols using SDS 1% for 2h and DS 2% for 1h, efficiently removed the cells and were better characterized. These scaffolds preserved the original organization of ECM. In addition, the residual toxicity assessment did not reveal statistically significant changes while decellularized scaffolds retained the equivalent biomechanical properties when compared with the control. Our results concluded that protocols using SDS and DS were effective at obtaining decellularized scaffolds, which may be useful for blood vessel tissue engineering. PMID:24929113

Bertanha, Matheus; Moroz, Andrei; Jaldin, Rodrigo G; Silva, Regina A M; Rinaldi, Jaqueline C; Golim, Márjorie A; Felisbino, Sérgio L; Domingues, Maria A C; Sobreira, Marcone L; Reis, Patricia P; Deffune, Elenice

2014-08-01

99

Electrolytic Inferior Vena Cava Model (EIM) of Venous Thrombosis  

PubMed Central

Animal models serve a vital role in deep venous thrombosis (DVT) research in order to study thrombus formation, thrombus resolution and to test potential therapeutic compounds (1). New compounds to be utilized in the treatment and prevention of DVT are currently being developed. The delivery of potential therapeutic antagonist compounds to an affected thrombosed vein has been problematic. In the context of therapeutic applications, a model that uses partial stasis and consistently generates thrombi within a major vein has been recently established. The Electrolytic Inferior vena cava Model (EIM) is mouse model of DVT that permits thrombus formation in the presence of continuous blood flow. This model allows therapeutic agents to be in contact with the thrombus in a dynamic fashion, and is more sensitive than other models of DVT (1). In addition, this thrombosis model closely simulates clinical situations of thrombus formation and is ideal to study venous endothelial cell activation, leukocyte migration, venous thrombogenesis, and to test therapeutic applications (1). The EIM model is technically simple, easily reproducible, creates consistent thrombi sizes and allows for a large sample (i.e. thrombus and vein wall) which is required for analytical purposes. PMID:21775963

Diaz, Jose A.; Wrobleski, Shirley K.; Hawley, Angela E.; Lucchesi, Benedict R.; Wakefield, Thomas W.; Myers, Jr., Daniel D.

2011-01-01

100

Case of persistent left superior vena cava draining via the left atrium with a normal coronary sinus utilizing cardiac CT.  

PubMed

With an estimated incidence of ? 0.5%-2% of the population and 10% of patients with congenital heart disorders, persistent LSVC is the most common venous anomaly of the chest. Most drain via the right atrium. Rarely (7.5% of cases), the persistent LSVC may drain directly into the left atrium. These are typically seen with a coronary sinus type atrial septal defect with many investigators believing that, embryologically, a normal coronary sinus cannot exist in the setting of a persistent LSVC draining into the left atrium. There have been few case reports of this in the setting of a normal coronary sinus. With the assistance of cardiac CT, we were able to show the existence of this rare entity. The CT images provided guidance for a successful endovascular repair. PMID:22732204

Middlebrooks, Erik; Wymer, David; Chandran, Arun

2012-01-01

101

Strut interlocking of Titanium Greenfield vena cava filters and its effect on clot capturing: An in vitro study  

Microsoft Academic Search

Purpose: To determine the influence of filter leg-interlocking on filtering efficiency of titanium Greenfield inferior vena cava filters in an in vitro model. Methods: Titanium Greenfield filters (TGF) were placed in an inferior vena cava (IVC) flow phantom with no interlocking legs, or with one or two pairs of legs interlocked. Clot emboli of varying sizes were introduced into the

Craig D. Korbin; Richard J. Van Allan; Robert T. Andrews; Michael D. Katz; George P. Teitelbaum

1994-01-01

102

Transcatheter Closure of Patent Ductus Arteriosus and Interruption of Inferior Vena Cava with Azygous Continuation Using an Amplatzer Duct Occluder  

Microsoft Academic Search

Two cases with interrupted inferior vena cava and azygous continuation requiring patent ductus arteriosus (PDA) occlusion\\u000a per cardiac catheterization are presented. A technique is described enabelmy occlusion of PDA using an Amplatzer ductal occluder\\u000a despite interruption of inferior vena cava and azygous continuation.

Sadiq Al-Hamash

2006-01-01

103

CONTOURITES IN LAKE SUPERIOR  

EPA Science Inventory

Contour currents influence sedimentation in an area 15 km wide and 65 km long at the base of the slope off the Keweenaw Peninsula in Lake Superior, northwestern Michigan. Seismic-reflection profiles (3.5 kHz) from this area show distinct wavy reflectors in a scoured trough at a d...

104

Resection of a malignant paraganglioma located behind the retrohepatic segment of the inferior vena cava  

PubMed Central

Background Resection of a retrocaval paraganglioma is technically challenging due to limited tumor accessibility and proximity to the vena cava. Case presentation A large, malignant paraganglioma was found behind the retrohepatic segment of the inferior vena cava of a 60-year-old male. During resection of this rare paraganglioma, the left lateral lobe of the liver, a portion of the caudate lobe of the liver, and the gallbladder were also removed. Unfortunately, the patient died six months after surgery due to hepatic metastasis. Conclusion This case demonstrates that a partial hepatectomy may be necessary to improve tumor accessibility during resection of a retrocaval paraganglioma, particularly if the tumor is proximal to the vena cava. Furthermore, palliative treatments may help prevent tumor recurrence and metastasis of malignant paragangliomas. PMID:24164783

2013-01-01

105

Retrievable Inferior Vena Cava Filters: Factors that Affect Retrieval Success  

SciTech Connect

Purpose: To report and analyze the indications, procedural success, and complications of retrievable inferior vena cava filters (rIVCF) placement and to identify parameters that influence retrieval attempt and failure. Methods: Between January 2005 and December 2010, a total of 200 patients (80 men, median age 67 years, range 11-95 years) received a rIVCF with the clinical possibility that it could be removed. All patients with rIVCF were prospectively entered into a database and followed until retrieval or a decision not to retrieve the filter was made. A retrospective analysis of this database was performed. Results: Sixty-one percent of patients had an accepted indication for filter placement; 39% of patients had a relative indication. There was a tendency toward a higher retrieval rate in patients with relative indications (40% vs. 55%, P = 0.076). Filter placement was technically successful in all patients, with no procedure-related mortality. The retrieval rate was 53%. Patient age of >80 years (odds ratio [OR] 0.056, P > 0.0001) and presence of malignancy (OR 0.303, P = 0.003) was associated with a significantly reduced probability for attempted retrieval. Retrieval failure occurred in 7% (6 of 91) of all retrieval attempts. A time interval of > 90 days between implantation and attempted retrieval was associated with retrieval failure (OR 19.8, P = 0.009). Conclusions: Patient age >80 years and a history of malignancy are predictors of a reduced probability for retrieval attempt. The rate of retrieval failure is low and seems to be associated with a time interval of >90 days between filter placement and retrieval.

Geisbuesch, Philipp, E-mail: philippgeisbuesch@gmx.de; Benenati, James F.; Pena, Constantino S.; Couvillon, Joseph; Powell, Alex; Gandhi, Ripal; Samuels, Shaun; Uthoff, Heiko [Baptist Cardiac and Vascular Institute, Division of Vascular and Interventional Radiology (United States)

2012-10-15

106

Adjunctive Inferior Vena Cava Filter Placement for Acute Pulmonary Embolism  

SciTech Connect

Inferior vena cava (IVC) filters are sometimes placed as an adjunct to full anticoagulation in patients with significant pulmonary embolism (PE). We aimed to determine the prevalence of adjunctive IVC filter placement in individuals diagnosed with PE, as well as the effect of adjunctive filter placement on mortality in patients with right heart strain associated with PE. This was a retrospective study of patients with acute PE treated with full anticoagulation admitted to a single academic medical center. Information abstracted from patient charts included presence or absence of right heart strain and of deep-vein thrombosis, and whether or not an IVC filter was placed. The endpoint was in-hospital mortality. Over 2.75 years, we found that 248 patients were diagnosed with acute PE, with an in-hospital mortality rate of 4.4%. The prevalence of adjunctive IVC filter placement was 13.3% (33 of 248), and the prevalence of documented right heart strain was 27.0% (67 of 248). In-hospital mortality was 10.2% in the non-filter-treated group (5 of 49), whereas there were no deaths in the filter-treated group (0 of 18); however, the difference was not statistically significant (P = 0.37). Both the presence of deep-vein thrombosis and of right heart strain increased the likelihood that an adjunctive IVC filter was placed (P < 0.0001 and P < 0.001, respectively). At our institution, patients were treated with IVC filters in addition to anticoagulation in 13.3% of cases of acute PE. Prospective studies or large clinical registries should be conducted to clarify whether this practice improves outcomes.

Jha, V. M., E-mail: vjha@mfa.gwu.ed [George Washington University Medical Center, Division of Pulmonary and Critical Care Medicine, Department of Medicine (United States); Lee-Llacer, J. [George Washington University Medical Center, Department of Anesthesiology and Critical Care Medicine (United States); Williams, J.; Ubaissi, H.; Gutierrez, G. [George Washington University Medical Center, Division of Pulmonary and Critical Care Medicine, Department of Medicine (United States)

2010-08-15

107

Huge Trombus including Left Renal Vein, Ovarian Vein, and Inferior Vena Cava Mimicking Renal Colic  

PubMed Central

A 31-year-old female presented with acute left flank pain; she had a C/S at the postpartum day 24. Ureteral stone was suspected but ultrasound examination was normal. Then Doppler ultrasound revealed a trombus in left renal vein and inferior vena cava. Contrast enhanced MDCT scan showed swelled and nonfunctional left kidney, a trombus including distal part of left ovarian vein, left renal vein, and inferior vena cava. We started anticoagulation treatment. Further examination revealed diagnosis of chronic myeloproliferative disease. The trombus was completely recanalized at 3-month followup. PMID:25140270

Coban, Sermin; Katgi, Abdullah; Obuz, Funda; Kefi, Aykut

2014-01-01

108

Banked Vena Caval Homograft Replacement of the Inferior Vena Cava for Primary Leiomyocsarcoma  

PubMed Central

Primary leiomyosarcoma of the inferior vena cava (IVC) is a rare malignant tumor. Herein, we report the case of a 52-year-old male patient who had postprandial abdominal distension and right upper quadrant abdominal pain. The abdominal computed tomography (CT) angiogram showed an IVC mass extending from the infrahepatic to the suprarenal inferior vena cava. The radiologic findings were suggestive of an IVC leiomyosarcoma. Surgical resection and reconstruction with a cryopreserved homograft were performed. The follow-up abdominal CT angiogram revealed the patient to be disease-free 6 months after surgery with patency of the IVC and renal vein. PMID:25346904

Lim, Jae Hong; Sohn, Suk Ho; Sung, Yong Won; Moon, Hyeon Jong; Choi, Jae-Sung; Oh, Se Jin

2014-01-01

109

Superior Ptolemaic Model  

NSDL National Science Digital Library

The Ejs Superior Ptolemaic model illustrates Ptolemy's orbit for a superior planet. The model consists of a deferent circle, centered on a point some distance from Earth (at the eccentric point). Attached to this deferent is the center of another circle, the epicycle. The center of the epicycle moves around the deferent with constant angular speed as seen from the equant point, which is exactly opposite the center of the deferent from Earth (so the center of the epicycle does not move at constant speed along the deferent). The planet moves along the epicycle at constant speed. This model is capable of reproducing retrograde motion and variations in the planet's brightness. It can also reproduce variations in the apparent size and spacing of the retrograde arcs. In this simulation the planet is assumed to move in the plane of the ecliptic, so its latitude is always zero. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item. Ejs Superior Ptolemaic model was created using the Easy Java Simulations (Ejs) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_astronomy_SuperiorPtolemaic.jar file will run the program if Java is installed. Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models. Additional Ejs models for astronomy are available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

Timberlake, Todd

2009-08-19

110

Lake Superior, Duluth, MN  

NASA Technical Reports Server (NTRS)

This view shows the west end of Lake Superior and Duluth, MN (47.0N, 91.0W). Portions of Minnesota, Michigan and Ontario, Canada are in the scene. The Duluth metropolitan area is at the west end of the lake. The discoloration plume in the water at Duluth is the result of tailings from the iron ore smelters that process the iron ore from the nearby open pit mines seen near the upper left corner of the photo.

1973-01-01

111

Rare case of primary inferior vena cava leiomyosarcoma on F-18 fluorodeoxyglucose positron emission tomography-computed tomography scan: Differentiation from nontumor thrombus in a background of procoagulant state.  

PubMed

We report a rare case of leiomyosarcoma of the inferior vena cava (IVC) in which F-18 fluorodeoxyglucose (F-18 FDG) positron emission tomography-computed tomography (PET-CT) scan provided vital evidence, which led to its diagnosis, in a background of procoagulant state of the patient, where previous ultrasound-Doppler and echocardiography studies were nonspecific and revealed bilateral lower limb deep vein thrombosis with thrombus in IVC. The whole body F-18 FDG PET-CT scan was done in view of no significant improvement in clinical status of the patient over few months in spite of appropriate medical management. FDG PET-CT scan revealed high grade uptake in a large mass lesion occupying the right atrium, extending superiorly into terminal superior vena cava, inferiorly into dilated IVC and probably into hepatic veins. CT guided biopsy of this F-18 FDG avid mass was consistent with the diagnosis of leiomyosarcoma, which however was not amenable to surgery at this stage. F-18 FDG PET-CT accurately differentiated tumor mass from bland thrombus and further had a significant impact on the management, since aggressive surgery combined with adjuvant therapy offers the best outcome for patients with leiomyosarcoma of the IVC. PMID:25400364

Singh, Natasha; Shivdasani, Divya; Karangutkar, Sanket

2014-10-01

112

Resection and reconstruction of the inferior vena cava for neoplasms  

PubMed Central

AIM: To evaluate the results of an aggressive surgical approach of resection and reconstruction of the inferior vena cava (IVC). METHODS: The approach to caval resection depends on the extent and location of tumor involvement. The supra- and infra-hepatic portion of the IVC was dissected and taped. Left and right renal veins were also taped to control the bleeding. In 12 of the cases with partial tangential resection of the IVC, the flow was reduced to less than 40% so that the vein was primarily closed with a running suture. In 3 of the cases, the lumen of the vein was significantly reduced, requiring the use of a polytetrafluoroethylene (PTFE) patch. In 2 of the cases with segmental resection of the IVC, a PTFE prosthesis was used and in 1 case, the IVC was resected without reconstruction due to shunting the blood through the azygos and hemiazygos veins. RESULTS: The mean operation time was 266 min (230-310 min) with an average intraoperative blood loss of 300 mL (200-2000 mL). The patients stayed in intensive care unit for 1.8 d (1-3 d). Mean hospital stay was 9 d (7-15 d). Twelve patients (66.7%) had no complications and 6 patients (33.3%) had the following complications: acute bleeding in 2 patients; bile leak in 2 patients; intra abdominal abscess in 1 patient; pulmonary embolism in 2 patients; and partial thrombosis of the patch in 1 patient. General complications such as pneumonia, pleural effusion and cardiac arrest were observed in the same group of patients. In all but 1 case, the complications were transient and successfully controlled. The mortality rate was 11.1% (n = 2). One patient died due to cardiac arrest and pulmonary embolism in the operation room and the second one died 2 d after surgery due to coagulopathy. With a median follow-up of 24 mo, 5 (27.8%) patients died of tumor recurrence and 11 (61.1%) are still alive, but three of them have a recurrence on computed tomography. CONCLUSION: There are a variety of options for reconstruction after resection of the IVC that offers a higher resectable rate and better prognosis in selected cases. PMID:22590663

Vladov, Nikola Nikolov; Mihaylov, Vassil Ivanov; Belev, Nikolai Vassilev; Mutafchiiski, Ventzislav Metodiev; Takorov, Ivelin Rumenov; Sergeev, Sergei Kirilov; Odisseeva, Evelina Hristova

2012-01-01

113

[Massive intrahepatic haemorrhage responsible for an inferior vena cava syndrome: an exceptional complication of hepatocellular carcinoma].  

PubMed

Intralesional massive haemorrhage responsible for inferior vena cava syndrome is a very rare complication of hepatocellular carcinoma. A 36-year-old man with no past medical history was referred to hospital for abdominal pain with clinical and biological signs of internal bleeding. An abdominal CT scan showed a huge right liver mass, with regular margins and a fluid content, indicating a large intratumoral haemorrhage complicating hepatocellular carcinoma. Due to haemodynamic stability and the signs of inferior vena cava compression conservative management was chosen prior to surgical treatment of the tumour. Three months later, the huge liver mass remained unchanged but the inferior vena cava syndrome had decreased and the patient's condition improved. After evaluation of liver function and the extent of the tumour, a surgical procedure was performed via a subcostal incision with midline extension and sternotomy to control the intrapericardial inferior vena cava and perform a veno-venous bypass with the technique used for orthotopic liver transplantation. Then, right hepatectomy (segments V to VIII) was performed with an anterior approach. The postoperative course was uneventful. This two-step strategy allowed successful surgery for this rare complication of a hepatocellular carcinoma on a normal liver and could be recommended for the management of any unruptured intratumoral haemorrhages. PMID:16633318

Ettorre, Giuseppe Maria; Douard, Richard; Santoro, Roberto; Vidiri, Antonello; Vennarecci, Giovanni; Carboni, Fabio; Boschetto, Arianna; Corazza, Valerio; Maritti, Michela; Antonini, Mario; Santoro, Eugenio

2006-03-01

114

Retrieval of Cement Embolus from Inferior Vena Cava After Percutaneous Vertebroplasty  

SciTech Connect

Percutaneous vertebroplasty is an accepted treatment for painful vertebral compression fractures caused by osteoporosis and malignant disease. Venous leakage of cement and pulmonary cement embolism have been reported complications. We describe a paravertebral venous cement leak resulting in the deposition of a cement cast in the inferior vena cava and successful retrieval of the cement embolus.

Athreya, S., E-mail: sathreya@stjoes.c [St. Joseph's Healthcare, Department of Radiology (Canada); Mathias, N. [Gartnavel General Hospital, Department of Radiology (United Kingdom); Rogers, P. [Gartnavel General Hospital, Department of Surgery (United Kingdom); Edwards, R. [Gartnavel General Hospital, Department of Radiology (United Kingdom)

2009-07-15

115

Thrombosis of the cranial vena cava in a cow with bronchopneumonia and traumatic reticuloperitonitis  

PubMed Central

This paper reports the clinical findings, surgical and medical management, and necropsy of a 6-year-old cow with thrombosis of the cranial vena cava and thrombo-embolic pneumonia following traumatic reticuloperitonitis. The clinical diagnosis was confirmed by necropsy. PMID:22547845

Gerspach, Christian; Wirz, Mirjam; Schweizer-Knubben, Gabriela; Braun, Ueli

2011-01-01

116

Transitional cell carcinoma of the kidney with tumor thrombus into the vena cava  

Microsoft Academic Search

Transitional cell carcinoma of the upper urinary tract with inferior vena cava tumor thrombus is an unusual entity. We report the 16th such case and review the previous cases in the world literature. Preoperative diagnosis was correct in only 5 of the cases. This type of condition can be easily presumed to be renal cell carcinoma. Fifteen of the cases

Joseph H. Williams; Harold A. Frazier; Keith E. Gawith; William B. Laskin; Paul J. Christenson

1996-01-01

117

"Acute pseudo-pericardial tamponade": the compression of the thoracal inferior vena cava – a case report  

PubMed Central

We describe a case of 68-year-old woman which was admitted to our hospital for mitral valve replacement (MVR), in whom acute compresion of the vena cava inferior developed after repair of lacerated atrio-caval junction with hemostatic tissue sealant, biologic glue (BioGlue, Cryolife, ?nc, Kennesaw, Ga). Removal of the BioGlue relieved the unexpected problem. PMID:19239687

Cavolli, Raif; Kaya, Kaan; Elalmis, Altay Omer

2009-01-01

118

Statistics of superior records  

NASA Astrophysics Data System (ADS)

We study statistics of records in a sequence of random variables. These identical and independently distributed variables are drawn from the parent distribution ?. The running record equals the maximum of all elements in the sequence up to a given point. We define a superior sequence as one where all running records are above the average record expected for the parent distribution ?. We find that the fraction of superior sequences SN decays algebraically with sequence length N, SN˜N-? in the limit N??. Interestingly, the decay exponent ? is nontrivial, being the root of an integral equation. For example, when ? is a uniform distribution with compact support, we find ?=0.450265. In general, the tail of the parent distribution governs the exponent ?. We also consider the dual problem of inferior sequences, where all records are below average, and find that the fraction of inferior sequences IN decays algebraically, albeit with a different decay exponent, IN˜N-?. We use the above statistical measures to analyze earthquake data.

Ben-Naim, E.; Krapivsky, P. L.

2013-08-01

119

Three-dimensional rotational angiography of the inferior vena cava as an adjunct to inferior vena cava filter retrieval.  

PubMed

The objective of this study was to explore the role of three-dimensional (3-D) rotational angiography (RA) of the inferior vena cava (IVC; 3-D CV) before filter retrieval and its impact on treatment planning compared with standard anteroposterior cavography (sCV). Thirty patients underwent sCV and 3-D CV before IVC filter retrieval. Parameters assessed were: projection of filter arms or legs beyond the caval lumen, thrombus burden within the filter and IVC, and orientation of the filter within IVC. Skin and effective radiation doses were calculated. Statistical analysis was performed using paired Student t test and nonparametric McNemar's test. Standard anteroposterior cavography detected 49 filter arms or legs projecting beyond the caval lumen in 25 patients. Three-dimensional CV demonstrated 89 filter arms or legs projecting beyond the caval lumen in 28 patients. Twenty-two patients had additional filter arms or legs projecting beyond the caval lumen detected on 3-D CV that were not detected on sCV (p < 0.001). Filter apex tilt detection differed significantly (p < 0.001) between sCV and 3-D CV, with 3-D CV being more accurate. The filter apex abutted the IVC wall in 10 patients (33%) on 3-D CV, but this was diagnosed in only 3 patients (10%) with sCV. Thrombus was detected in 8 patients (27%), 1 thrombus of which was seen only on 3-D CV, and treatment was changed in this patient because of thrombus size. Mean effective radiation doses for 3-D CV were approximately two times higher than for sCV (1.68 vs. 0.86 mSv), whereas skin doses were three times lower (12.87 vs. 35.86 mGy). Compared with sCV, performing 3-D CV before optional IVC filter retrieval has the potential to improve assessment of filter arms or legs projecting beyond the caval lumen, filter orientation, and thrombus burden. PMID:18663520

Bozlar, Ugur; Edmunds, J Stewart; Turba, Ulku C; Hartwell, Gary D; Housseini, Ahmed M; Hagspiel, Klaus D

2009-01-01

120

Contourites in Lake Superior  

NASA Astrophysics Data System (ADS)

Contour currents influence sedimentation in an area 15 km wide and 65 km long at the base of the slope off the Keweenaw Peninsula in Lake Superior, northwestern Michigan. Seismic-reflection profiles (3.5 kHz) from this area show distinct wavy reflectors in a scoured trough at a depth of 200 m at the base of the slope, hyperbolic echoes adjacent to the trough, and overlapping echoes farther lakeward. These acoustic features are identical to those in marine environments where contourites are deposited. Box cores from the lakeward margin of this area contain what appear to be contourites: irregular, thin sand layers with sharp upper and lower contacts, interbedded with sandy clay. The sandy clay layers are trough cross-laminated in some places and plain laminated in others. This is the first report of contourites in a lacustrine environment.

Johnson, Thomas C.; Carlson, Thomas W.; Evans, James E.

1980-09-01

121

Extensive pulmonary embolism after severe postpartum haemorrhage: management with an inferior vena cava filter.  

PubMed

We report the case of a 36-year-old woman with an inferior vena cava thrombosis and extensive pulmonary embolism six days after a severe postpartum haemorrhage. She had undergone caesarean section with bleeding managed by massive transfusion, hysterectomy, and two attempts at uterine artery embolization. Systemic thrombolysis and catheter-directed thrombolysis in intensive care were abandoned due to recent and incomplete uterine artery embolization. A temporary inferior vena cava filter was chosen because of significant risk of massive pulmonary embolism. This was a controversial decision because guidelines from different professional groups offer conflicting recommendations. The therapeutic options for the management of massive postpartum pulmonary embolism when thrombolysis is contraindicated are discussed. PMID:25223642

Bilger, A; Pottecher, J; Greget, M; Boudier, E; Diemunsch, P

2014-11-01

122

[Parturient at full term with inferior vena cava thrombosis: anesthesia during surgical delivery].  

PubMed

Emergency cesarean section is a high-risk situation because of potential maternal-fetal complications. We report a case in which risk increased due to a massive thrombus in the mother's left common femoral vein extending to the vena cava. A 31-year-old woman with no relevant medical history in the 41st week of pregnancy was scheduled for induction. Two days before the planned induction she was admitted to the emergency department, where she was diagnosed with deep vein thrombosis in the left lower limb. She was transferred to the postanesthetic recovery unit, where a multidisciplinary team (from gynecology, hematology, interventional radiology, and anesthesiology) discussed various therapeutic options (thrombectomy, vena cava filter, or anticoagulation by intravenous infusion of unfractionated heparin). Given that deep vein thrombosis coincided with obstetric delivery, it was crucial to decide on anesthetic and therapeutic approaches that would assure maternal and fetal safety and prevent such complications as massive pulmonary thromboembolism. PMID:20527346

Fernández, E; Dueñas, N; Villafranca, A; Perea, M; Amorós, B; Bermejo, L

2010-05-01

123

Computed Tomography Angiography of Situs Inversus, Portosystemic Shunt and Multiple Vena Cava Anomalies in a Dog  

PubMed Central

ABSTRACT A 5-year-old Shih Tzu was presented with intermittent vomiting and anorexia. Microhepatica and reversed position of the abdominal organs were observed on radiography. Ultrasonographically, portosystemic shunt (PSS) was tentatively diagnosed. Computed tomography (CT) revealed that the distended portal vein drained into the left hepatic vein. The caudal vena cava (CdVC) split postrenally and converged at the renal level. Cranial to this, the azygos continuation of the CdVC was confirmed. In the thorax, a persistent left cranial vena cava (CrVC) was found along with right CrVC. This is the first report of a dog with persistent left CrVC and multiple abdominal malformations. CT angiography was useful in evaluating the characteristics of each vascular anomaly and determining the required surgical correction in this complex case. PMID:23842117

OUI, Heejin; KIM, Jisun; BAE, Yeonho; OH, Juyeon; PARK, Seungjo; LEE, Gahyun; JEON, Sunghoon; CHOI, Jihye

2013-01-01

124

A caval homograft for Budd-Chiari syndrome due to inferior vena cava obstruction  

PubMed Central

Transjugular intrahepatic portosystemic shunt (TIPS) is the standard treatment of Budd-Chiari syndrome (BCS) non responsive to medical therapy. However, patients with inferior vena cava (IVC) obstruction proximal to the atrium do not benefit from TIPS and a surgical approach is mandatory. We report the case of BCS due to intrapericardial IVC obstruction. We describe a novel surgical approach using a fresh caval homograft. An attempt to balloon dilatation of the IVC obstruction was complicated by right atrial disruption with tamponade and ventricular fibrillation. Lately, the patient successfully underwent a reconstruction of the cavo-atrial continuity by the interposition of a fresh caval homograft, a novel surgical approach never described before for BCS. Further follow-up revealed progressive reduction and resolution of ascites, and overall clinical improvement. IVC obstruction near to the atrium can be surgically approached with a new technique consisting in inferior vena cava resection and replacement with a caval homograft. PMID:23717741

Mancuso, Andrea; Martinelli, Luigi; De Carlis, Luciano; Rampoldi, Antonio Gaetano; Magenta, Giovanni; Cannata, Aldo; Belli, Luca Saverio

2013-01-01

125

Entrapment of Guide Wire in an Inferior Vena Cava Filter: A Technique for Removal  

SciTech Connect

Entrapment of a central venous catheter (CVC) guide wire in an inferior vena cava (IVC) filter is a rare, but reported complication during CVC placement. With the increasing use of vena cava filters (VCFs), this number will most likely continue to grow. The consequences of this complication can be serious, as continued traction upon the guide wire may result in filter dislodgement and migration, filter fracture, or injury to the IVC. We describe a case in which a J-tipped guide wire introduced through a left subclavian access without fluoroscopic guidance during CVC placement was entrapped at the apex of an IVC filter. We describe a technique that we used successfully in removing the entrapped wire through the left subclavian access site. We also present simple useful recommendations to prevent this complication.

Abdel-Aal, Ahmed Kamel, E-mail: akamel@uabmc.edu; Saddekni, Souheil [University of Alabama at Birmingham, Department of Radiology (United States)] [University of Alabama at Birmingham, Department of Radiology (United States); Hamed, Maysoon Farouk [University of Alabama at Birmingham, Department of Anesthesia (United States)] [University of Alabama at Birmingham, Department of Anesthesia (United States); Fitzpatrick, Farley [Radiology Specialists of Louisville (United States)] [Radiology Specialists of Louisville (United States)

2013-04-15

126

Hepato-venous reconstruction in orthotopic liver transplantation with preservation of the recipients' inferior vena cava and veno-venous bypass  

Microsoft Academic Search

Background and aims: The potential advantages of vena cava-preserving recipient hepatectomy in orthotopic liver transplantation are reduced hemorrhage, improved cardiovascular stability and preserved renal perfusion without the requirement of veno-venous bypass as compared with recipient hepatectomy including the vena cava. No detailed information is available on the use of veno-venous bypass during complicated vena cava preserving recipient hepatectomy and liver

U. J. Hesse; F. Berrevoet; R. Troisi; P. Pattyn; E. Mortier; J. Decruyenaere; B. de Hemptinne

2000-01-01

127

Surgical Stapler for Right Renal Vein Elongation Using the Inferior Vena Cava in Kidney Transplant.  

PubMed

Elongation of the right renal vein with the inferior vena cava (caval patch) using a vascular stapler offers a safe means of extending the deceased-donor right renal vein, while minimizing the ischemic time of the kidney during preparatory dissection. The aortic patch of the right renal artery also can be preserved, which minimize the danger of arterial stenosis, kinking, and dissection. PMID:25233447

Di Cocco, Pierpaolo; Kandilis, Apostolos; Rajagopal, Poyyamozhi; Herbert, Paul; Hassen, Yasmin; Hakim, Nadey

2014-09-17

128

Tips and tricks for retrieval of permanent TRAPEASE® filters for inferior vena cava.  

PubMed

The placement of permanent inferior vena cava filters has definite indications and some filters have been shown to be more problematic in the long term than others. This report outlines the technique for TRAPEASE® filter removal in two patients. The first filter was retrieved four weeks after insertion and the second filter was retrieved 14 months after it was inserted at another institution. A planned approach for retrieval is described in these case reports. PMID:25430659

Mousa, Albeir Y; AbuHalimah, Shadi; Yacoub, Michael; Sheikh, Iqra; AbuRahma, Ali F

2014-11-27

129

Proton Beam Therapy for Hepatocellular Carcinoma with Inferior Vena Cava Tumor Thrombus: Report of Three Cases  

Microsoft Academic Search

Three patients with hepatocellular carcinoma (HCC) and inferior vena cava tumor thrombus (IVCTT) were treated using proton beam therapy at the University of Tsukuba, Japan. A total dose of 50-70 Gy in 10-35 fractions was given to the primary tumor and IVCTT. All the patients survived for more than 1 year from the beginning of proton beam therapy (13-55 months)

Masashi Mizumoto; Koichi Tokuuye; Shinji Sugahara; Masaharu Hata; Nobuyoshi Fukumitsu; Takayuki Hashimoto; Kayoko Ohnishi; Keiko Nemoto; Kiyoshi Ohara; Yasushi Matsuzaki; Eriko Tohno; Yasuyuki Akine

2007-01-01

130

Primary bidirectional superior cavopulmonary shunt in infants between 1 and 4 months of age.  

PubMed

The performance of a primary bidirectional superior cavopulmonary shunt procedure in early infancy is attractive because it minimizes the number of operations needed before a Fontan procedure, avoids ventricular volume overload and its sequelae, and eliminates pulmonary artery distortion. However, concerns over elevated or labile pulmonary vascular resistance have limited its use in the first few months of life. Nine patients aged 1 to 4 months (5 patients, < 2 months) have undergone a primary bidirectional superior cavopulmonary shunt procedure between October 1992 and March 1994. Primary diagnoses were tricuspid atresia (n = 4), asplenia syndrome (n = 2), polysplenia syndrome (n = 1), double-outlet right ventricle (n = 1), and double-inlet left ventricle (n = 1). Associated lesions of immediate surgical importance were total anomalous pulmonary veins (n = 2), a restrictive atrial septum (n = 4), bilateral superior venae cavae (n = 5), and patent ductus arteriosus (n = 5). The surgical procedure consisted of unilateral (n = 4) or bilateral (n = 5) bidirectional superior cavopulmonary shunt and the repair of associated lesions. Of significance, in 4 of our first 5 patients a very limited additional source of pulmonary blood flow was provided because of a low arterial oxygen tension immediately after cardiopulmonary bypass. Pleural effusions developed in 2 of these 4 patients. In subsequent patients cardiopulmonary bypass was not used whenever possible or, if it was needed, use of an extra source of pulmonary blood flow was avoided.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:7733707

Reddy, V M; Liddicoat, J R; Hanley, F L

1995-05-01

131

Sodium nitroprusside activates potassium channels in the vena cava in normotensive but not in hypertensive rats.  

PubMed

Despite the importance of the venous system in the regulation of blood pressure, there are few studies that evaluate venous function in health and disease, and the effects of drugs on venous function. Blood pressure depends directly on the peripheral resistance and cardiac output. Unlike the peripheral resistance, in which the contractile activity of the arteries is the key factor, cardiac output depends primarily on the venomotor tone. An increase in cardiac blood pressure can be caused by an increase in blood volume, structural changes in the walls of the veins, leading to a reduced compliance thereof, or an increase in the contractile activity of venous smooth muscle. This study examined the effect of sodium nitroprusside (SNP), a classical nitric oxide donor, on vascular relaxation in the vena cava from normotensive (2K) and renal hypertensive (2K-1C) rats. We studied the effect of this compound in vena cava rings from normotensive and renal hypertensive rats. We showed for the first time that the vascular relaxation induced by SNP is impaired in vena cavas from hypertensive rats because of an impaired functional activity of potassium channels. Another relevant finding of this study is that the sarcoplasmic reticulum Ca(2+) ATPase is not involved in the venorelaxation induced by SNP. PMID:23784507

Paulo, Michele; Araujo, Alice Valença; Bendhack, Lusiane Maria

2013-09-01

132

Effect of phlorotannins isolated from Ecklonia cava on angiotensin I-converting enzyme (ACE) inhibitory activity  

PubMed Central

Inhibition of angiotensin I-converting enzyme (ACE) activity is the most common mechanism underlying the lowering of blood pressure. In the present study, five organic extracts of a marine brown seaweed Ecklonia cava were prepared by using ethanol, ethyl acetate, chloroform, hexane, and diethyl ether as solvents, which were then tested for their potential ACE inhibitory activities. Ethanol extract showed the strongest ACE inhibitory activity with an IC50 value of 0.96 mg/ml. Five kinds of phlorotannins, phloroglucinol, triphlorethol-A, eckol, dieckol, and eckstolonol, were isolated from ethanol extract of E. cava, which exhibited potential ACE inhibition. Dieckol was the most potent ACE inhibitor and was found to be a non-competitive inhibitor against ACE according to Lineweaver-Burk plots. Dieckol had an inducible effect on the production of NO in EAhy926 cells without having cytotoxic effect. The results of this study indicate that E. cava could be a potential source of phlorotannins with ACE inhibitory activity for utilization in production of functional foods. PMID:21556221

Wijesinghe, W.A.J.P.; Ko, Seok-Chun

2011-01-01

133

The Anatomical Correlation between the Internal Venous Vertebral System and the Cranial Venae Cavae in Rabbit  

PubMed Central

The aim of this study was to describe the possible variations in the connection between the internal venous vertebral system and the cranial vena cava in rabbit using corrosion technique. The study was carried out on 40 adult New Zealand white rabbits. The venous system was injected by using Batson's corrosion casting kit number 17. We found the connection between the internal venous vertebral system and the cranial vena cava by means of the vertebral veins and the right azygos vein. The vertebral vein was present as independent tributary in 36 cases (90%). In the rest of the cases, it was found as being double, being triple, or forming a common trunk with other veins. The azygos vein was present as independent tributary of the cranial vena cava in 39 cases (97.5%). We found also a common trunk formed by the junction of the deep cervical vein, the right vertebral vein, and the azygos vein in one case (2.5%). The azygos vein received 6, 7, 8, or 9 pairs of dorsal intercostal veins. Documenting the anatomical variations in the rabbit will aid in the planning of future experimental studies and determining the clinical relevance on such studies. PMID:24349785

Mazensky, David; Petrovova, Eva; Danko, Jan

2013-01-01

134

Vena Cava Filter Behavior and Endovascular Response: An Experimental In Vivo Study  

SciTech Connect

Purpose: To evaluate the behavior and endovascular response of a new nitinol permanent vena cava filter, the TrapEase. Methods: Percutaneous implantation of the filter was performed in six goats, with inferior vena cava (IVC)diameter close to that of man. Radiologic data concerning the IVC,filter diameter, patency and stability were collected. At 2, 4, 20 and 26 weeks post-implantation, histopathologic analysis of the IVC wall was performed at the site of filter distension, and distal and proximal to the filter. Results: All filters remained patent.There was no migration and no signs of biological incompatibility.Signs of neointimalization were seen at 2 weeks, with well-developed neointima at 4 weeks. No acute vessel wall perforation was detected by cavography at implantation. During follow-up histologic analysis at 26 weeks, perforation of some of the small fixation barbs was seen,causing minimal damage to the vessel wall and adjacent organ tissue without impairing organ function. These events were well tolerated, probably due to the gradual nature of the penetration of fixation barbsallowing reactive fibrous tissue development. At 26 weeks the parallel filter struts were well covered with neointima and did not perforate the vessel wall. There were no complications associated with the filter implantation. Conclusions: The TrapEase vena cava filter was well tolerated and is suitable for incorporation into the IVC wall of healthy animals without any apparent deleterious reaction due to biological incompatibility.

Hoekstra, Arend [Academic Hospital Groningen, Hanzeplein 1, 9713 GZ Groningen, Bio-Medical Technology Center (Netherlands); Hoogeveen, Yvonne [Cordis EuropaN.V., Oosteinde 8, 9300 AA Roden, Product Development (Netherlands)], E-mail: hoog.west@wxs.nl; Elstrodt, Jan M. [University of Groningen, A. Deusinglaan 50, 9713 AZ Groningen, Animal ResearchLaboratory (Netherlands); Tiebosch, Anton T.M.G. [Academic Hospital Groningen, Hanzeplein 1, 9713GZ Groningen, Department of Pathology and Laboratory Medicine (Netherlands)

2003-06-15

135

Inflammatory markers of atherosclerosis are decreased after moderate consumption of cava (sparkling wine) in men with low cardiovascular risk.  

PubMed

Atherosclerosis is considered a low-grade inflammatory disease. Polyphenol-rich alcoholic beverages (red wine) have shown a more pronounced antiinflammatory effect than polyphenol-free alcoholic beverages (gin). However, no studies to our knowledge have evaluated the antiinflammatory effects of alcoholic beverages with medium-level polyphenol content such as cava (sparkling wine). We enrolled 20 healthy men (aged 34 +/- 9 y) in a randomized crossover study to receive 30 g ethanol/d as cava or gin for 28 d. Before both interventions, subjects abstained from alcohol for 2 wk. Inflammatory biomarkers of atherosclerosis and expression of adhesion molecules on peripheral leukocytes were measured before and after each intervention. Likewise, dietary intake and exercise were also evaluated. Expression of lymphocyte function-associated antigen-1 (LFA-1), very late activation antigen-4 (VLA-4), Sialyl-Lewis(x) (SLe(x)), and CD40 on monocytes decreased after cava intake (all P < 0.05), whereas only SLe(x) was reduced after gin intake (P = 0.036). Circulating markers of atherosclerosis including vascular cell adhesion molecule-1, E-selectin, and P-selectin decreased after both interventions (all P < 0.05). High-sensitivity C-reactive protein, intercellular adhesion molecule-1 (ICAM-1), IL-6, monocyte chemoattractant protein-1 (MCP-1), and CD40L were diminished only after cava intake (all P < 0.05). The effects of cava on circulating CD40L, ICAM-1, and MCP-1, and monocyte surface expression of CD40, LFA-1, and VLA-4 were greater than those of gin (all P < 0.05). In conclusion, both cava and gin showed antiinflammatory properties; however, cava had a greater protective effect, probably due its polyphenol content. PMID:17885011

Vázquez-Agell, Mónica; Sacanella, Emilio; Tobias, Ester; Monagas, María; Antúnez, Emilia; Zamora-Ros, Raúl; Andrés-Lacueva, Cristina; Lamuela-Raventós, Rosa Ma; Fernández-Solá, Joaquim; Nicolás, Jose María; Estruch, Ramon

2007-10-01

136

Superior semicircular canal dehiscence syndrome by the superior petrosal sinus.  

PubMed

Thinning or dehiscence of the superior semicircular canal may occur on the middle cranial fossa floor or adjacent to the superior petrosal sinus (SPS). However, no symptomatic cases of superior canal dehiscence by SPS have been previously described. A 45-year-old woman presented with left-side pulsating tinnitus, autophony and disequilibrium. Examination showed conductive hearing loss and decreased threshold of vestibular evoked myogenic potential in the left side. Sound and vibration stimuli and positive pressure insufflations into the left ear evoked mainly torsional nystagmus instead of vertical-torsional nystagmus. High-resolution temporal bone CT revealed a dehiscence of the superior canal close to the common crus, which was encased by SPS. Symptoms and signs resolved after plugging the dehiscence through a middle fossa approach. Deep groove of SPS may cause superior canal dehiscence close to the common crus, and costimulation of the superior and posterior canals may explain the mainly torsional nystagmus induced by sound and vibration stimuli. PMID:20176603

Koo, Ja-Won; Hong, Sung Kwang; Kim, Dong-Kyu; Kim, Ji Soo

2010-04-01

137

Primary retroperitoneal extraskeletal mesenchymal chondrosarcoma involving the vena cava: A case report  

PubMed Central

The current study presents a case of extraskeletal mesenchymal chondrosarcoma (ESMC) involving the vena cava that originally occurred in the retroperitoneum of a 61-year-old female. Following excision of the masses, pathological examination confirmed a diagnosis of primary ESMC. Mesenchymal chondrosarcomas are extremely rare in comparison to conventional chondrosarcomas and even more so when arising in an extraskeletal location. In the current report, the major characteristics of ESMC are discussed and a review of the current knowledge regarding this rare disease entity is presented. PMID:24932271

HU, HUI-JUAN; LIAO, MEI-YAN; XU, LI-YING

2014-01-01

138

Right varicocele associated with inferior vena cava malformation in situs inversus: percutaneous treatment with retrograde sclerotherapy.  

PubMed

Isolated right varicocele is a rare condition. It could be secondary to a retroperitoneal neoplastic mass involving the right internal spermatic vein, but sometimes, an anatomic variant must be considered. We present a case of a young man with situs inversus and right varicocele, a mirror image of the normal condition, associated with inferior vena cava malformation, who was treated successfully with retrograde selective percutaneous sclerotherapy of the right internal spermatic vein. Selective sclerotherapy of the internal spermatic vein at the time of venography has proved to be a valuable therapeutic option in right-sided varicocele associated with anatomic abnormalities. PMID:11789975

Preziosi, P; Miano, R; Bitelli, M; Ciolfi, M G; Micali, S; Micali, F

2001-12-01

139

Retrievable inferior vena cava filters may be safely applied in gastric bypass surgery  

Microsoft Academic Search

Introduction  Pulmonary embolus (PE) is a potentially devastating and fatal postoperative complication in morbidly obese patients. This\\u000a study was undertaken to review the safety and efficacy of retrievable prophylactic inferior vena cava (IVC) filters in high-risk\\u000a morbidly obese patients undergoing gastric bypass.\\u000a \\u000a \\u000a \\u000a Methods  Patients who underwent gastric bypass surgery and preoperative insertion of retrievable IVC filters had their records reviewed.\\u000a Indications for

Rob Schuster; Judith C. Hagedorn; Myriam J. Curet; John M. Morton

2007-01-01

140

A case of hepatic cyst-induced inferior vena cava thrombosis  

PubMed Central

A 92-year-old woman visited the hospital with edema of both lower extremities. Computed tomography revealed her inferior vena cava (IVC) was compressed by a massive hepatic cyst. A massive IVC thrombosis and pulmonary thromboembolism (PTE) were also observed. Medical treatment rather than radiologic intervention was preferred because of the patient’s advanced age and poor performance status. IVC thrombosis and PTE disappeared after 6 months of anticoagulation therapy. To the best of our knowledge, this is the first study in the English literature to report IVC thrombosis caused by congenital hepatic cysts that was treated without vascular intervention. PMID:24949001

Moon, Jaecheol; Heo, Dahee; Han, Sanghoon

2014-01-01

141

Early Onset of Periaortic Inflammation after EVAR with Inferior Vena Cava Involvement: A Case Report.  

PubMed

Endovascular treatment of abdominal aortic aneurysm (EVAR) represents a good alternative to open surgery, also in patients who present inflammatory abdominal aortic aneurysm, resulting in reduction of the inflammatory process in many cases. Instead, the onset of periaortic inflammation after EVAR is a rare event with an unclear pathogenesis, time of onset, and clinical presentation. This is a case report of a very early onset of periaortitis after EVAR with inferior vena cava involvement and stretching, resulting in lower limb swelling and back pain, treated by corticosteroid drug with a good remission of the pathology. PMID:25304907

Mansour, Wassim; Capoccia, Laura; Garofano, Roberta; Pranteda, Chiara; Speziale, Francesco

2015-01-01

142

Severe low back pain as the initial symptom of venous thrombosis of the inferior vena cava.  

PubMed

A 45-year-old previously well male truck driver presented to the emergency department with severe low back pain; lumbosacral X-ray was normal and he was given analgaesics and discharged. The following day, he presented to the emergency department again, his pain had not responded to the analgaesics; this time he also presented with massive bilateral swelling of lower limbs and left testicle that started 3?h earlier. The pain was severe, dull and interfered with the patient's ability to walk. An urgent workup revealed extensive thrombosis of the inferior vena cava. PMID:25155491

Tabatabai, Mohsen Abdul Wahab; Butros, Victor Mikhaeel; Mahdi, Shihab Ahmed; Ahmad, Mohammad Javad

2014-01-01

143

Compression of the Inferior Vena Cava by the Right Iliac Artery: A Rare Variant of May-Thurner Syndrome  

SciTech Connect

May-Thurner syndrome is known as compression of the left common iliac vein by the right common iliac artery. We describe a case of an atypical compression of the inferior vena cava by the right common iliac artery secondary to a high aortic bifurcation. Despite an extensive collateral network, there was a significant venous gradient between the iliac veins and the inferior vena cava above the compression. After stenting the venous pressure gradient disappeared. Follow-up 4 months later revealed a good clinical response with a patent stent.

Fretz, V.; Binkert, C. A., E-mail: Christoph.Binkert@ksw.c [Kantonsspital Winterthur, Department of Radiology (Switzerland)

2010-10-15

144

Replacement of Vena Cava up to the Right Atrium during Living Donor Liver Transplantation for Echinococcus alveolaris.  

PubMed

Management of advanced stage of Echinococcus alveolaris is a very difficult procedure. Surgical treatment like resection and liver transplantation is accepted procedure nowadays. Here we presented a case report of Echinococcus alveolaris which invaded the inferior vena cava up to the right atrium and surrounding tissues. This patient underwent living donor liver transplantation with replacement of inferior vena cava up to the right atrium with cryopreserved cadaveric aortic graft. This procedure is very difficult but it is a life-saving chance for patients in advanced cases of Echinococcus alveolaris. PMID:25506460

Yeti?ir, Fahri; Dogan, S Murad; Mamedov, Ruslan; Kayaalp, Cuneyt; Yilmaz, Sezayi

2014-01-01

145

Pancreatic and multiorgan resection with inferior vena cava reconstruction for retroperitoneal leiomyosarcoma  

PubMed Central

Background Inferior vena cava (IVC) leiomyosarcoma is a rare tumor of smooth muscle origin. It is often large by the time of diagnosis and may involve adjacent organs. A margin-free resection may be curative, but the resection must involve the tumor en bloc with the affected segment of vena cava and locally involved organs. IVC resection often requires vascular reconstruction, which can be done with prosthetic graft. Case presentation We describe a 39-year-old man with an IVC leiomyosarcoma that involved the adrenal gland, distal pancreas, and blood supply to the spleen and left kidney. Tumor excision involved en bloc resection of all involved organs with reimplantation of the right renal vein and reconstruction of the IVC with a polytetrafluoroethylene graft. The patient recovered without renal insufficiency, graft infection, or other complications. Follow-up abdominal imaging at 1 year showed a patent IVC graft and no locally recurrent tumor. Prosthetic graft provides a sufficient diameter and length for replacement conduit in extensive resection of IVC leiomyosarcoma. Conclusion To our knowledge, this is the first case of resection of an IVC sarcoma with prosthetic graft reconstruction in combination with pancreatic resection. Aggressive surgical resection including vascular reconstruction is warranted for select IVC tumors to achieve a potentially curative outcome. PMID:19126222

Stauffer, John A; Fakhre, G Peter; Dougherty, Marjorie K; Nakhleh, Raouf E; Maples, William J; Nguyen, Justin H

2009-01-01

146

Measurement of streaming potentials of mammalian blood vessels, aorta and vena cava, in vivo.  

PubMed

Attempts to measure streaming potentials in large rabbit blood vessels in vivo have been carried out. Streaming potentials, V(89), were measured by the introduction of microelectrodes through the wall of the blood vessel at separations greater than 1 cm. The outputs from these electrodes fed through calomel cells were amplified and recorded directly by using an Electronics for Medicine photorecorder (White Plains, N. Y.). "Effective streaming currents" were determined by running the output through a low impedence galvanometer while simultaneously measuring the resistance of the circuit V(8) were, therefore, calculated from two measurements and compared. Flow through vessels studied was measured using two different electromagnetic flowmeters. The results indicate that V(8) present in both aorta and vena cava are of the order of 5 to 10 mv. By using the Helmholtz-Smoluchowski equation into which flow was reintegrated, the numbers yield zeta potentials approximating 0.1 to 0.4 v in both aorta and vena cava. This number approaches the apparent upper limit for zeta (actually "interfacial potentials") potentials in biological systems. The measured "i.f." potential is considered as the interreaction of several physical and metabolic factors operating at the blood intimal interface. The polarity of the potential suggests that the interface is negative with respect to the blood flowing through the vessel. Interfacial potential and related V(8) are discussed in terms of their possible importance as a mechanism for maintaining vascular homeostasis in the living animal. PMID:5970567

Sawyer, P N; Himmelfarb, E; Lustrin, I; Ziskind, H

1966-09-01

147

Utero-ovarian varices and absent inferior vena cava in pregnancy.  

PubMed

Extensively distended and tortuous vessels on both sides of the uterus are rare incidental findings on transvaginal sonography in early pregnancy. A 31-year-old woman with a history of surgical repair for congenital intestinal stenosis was noted to have utero-ovarian varices on a transvaginal ultrasound examination during her first prenatal visit at 6 weeks' gestation. Magnetic resonance imaging revealed dilated ovarian veins along with infrarenal absence of inferior vena cava as well as the absence of external and common iliac veins. Despite concerns regarding spontaneous utero-ovarian vessels rupture, her antenatal course was uneventful. A vaginal delivery was successfully achieved without any postpartum complication. We also demonstrated an intraoperative view of the utero-ovarian vessels during cesarean section in her subsequent pregnancy. Absence of inferior vena cava and pelvic varices can occur in women with a history of neonatal surgery. Although the risk of utero-ovarian varices rupture remains unclear, vaginal delivery may be safely achieved. PMID:25363024

Kawata, Etsuko; Kondoh, Eiji; Kawasaki, Kaoru; Baba, Tsukasa; Ueda, Akihiko; Kido, Aki; Konishi, Ikuo

2014-11-01

148

Phlegmasia Cerulea Dolens: Rare Complication of Vena Cava Filter Placement in Man With Paraplegia  

PubMed Central

Objective: To describe a complication of placement of an inferior vena cava (IVC) filter in a man with paraplegia. Design: Case report. Participants/Methods: A 48-year-old man with T11 paraplegia secondary to an L1 burst fracture underwent thoracic spinal fusion. The postoperative course was complicated by deep vein thrombosis (DVT) of the right common femoral vein, which was treated with warfarin. Results: During rehabilitation, the hematocrit declined, and fluctuance was noted along the surgical site. Computed tomographic scan suggested a hematoma in the paraspinal and latissimus dorsi muscles. Warfarin was discontinued, and an IVC filter was placed. He subsequently developed severe leg pain, followed by hypotension, acute renal failure, and compartment syndrome in bilateral lower extremities requiring fasciotomies. Ultrasound and computed tomographic angiogram showed extensive bilateral lower extremity DVTs and pulmonary emboli. The diagnosis of cerulea dolens was made. Mechanical and pharmacological thrombectomy was aborted secondary to bleeding complications and hypotension. The patient died shortly after care was withdrawn at the family's request. The autopsy revealed multiple thrombi in IVC, bilateral pelvic and femoral veins, and left pulmonary artery embolus, consistent with phlegmasia cerulea dolens. Conclusions: Inferior vena cava filters may prevent pulmonary embolism but do not affect the underlying thrombotic process. An IVC filter should be recognized as a possible thrombogenic nidus in patients with spinal cord injury who have known DVT. PMID:18959358

Shem, Kazuko

2008-01-01

149

Initial experience in 115 patients with the retrievable Cook Celect vena cava filter.  

PubMed

The aim of this study was to evaluate our experience with the retrievable Cook Celect inferior vena cava (IVC) filter (William Cook, Europe) with regard to insertion, efficiency, ease of retrieval, and any associated complications. A retrospective review was performed of 115 patients (41 female, 74 male, mean age 47.97 years) who underwent Cook Celect IVC filter insertion between December 2005 and October 2007. Filter insertion was successful in all patients. Of the 115 filters inserted, 57 have been successfully retrieved (49.6%) to date. The successful retrieval rate from attempted retrieval was 93.4%. The mean dwell time of successfully retrieved filters was 114.9 days (range 14-267 days). Failed retrievals were due to a thrombosed vena cava (n = 1) and endothelialisation of the filter (n = 3). In the failed retrieval group the mean implantation time was 142 days (range 78-211 days). While this is the first retrospective clinical study on the Cook Celect filter, results to date are promising. We demonstrated an efficacious filter with a high successful retrieval rate of 93.4% and a low complication rate. The filter was assessed with extended dwell times (range 14-267 days). Failed retrieval secondary to hook endothelialisation continues to be an issue with this filter. We recognize that a limitation of our study was the lack of systematic follow-up for clinically silent complications. Further studies to evaluate longer term outcomes and effectiveness of this filter are warranted. PMID:19453530

Doody, O; Given, M F; Kavnoudias, H; Street, M; Thomson, K R; Lyon, S M

2009-02-01

150

Medical Technology for Superior Patient  

E-print Network

-ending drive to: · Assure patient and staff safety · Increase patient satisfaction · Attain superior clinical Protection Partnership for items normally under service contract · Patient safety and risk management on contemporary issues in healthcare technology, new clinical technology, compliance training, patient safety

Hayden, Nancy J.

151

"Acute pseudo-pericardial tamponade": the compression of the thoracal inferior vena cava--a case report.  

PubMed

We describe a case of 68-year-old woman which was admitted to our hospital for mitral valve replacement (MVR), in whom acute compression of the vena cava inferior developed after repair of lacerated atrio-caval junction with hemostatic tissue sealant, biologic glue (BioGlue, Cryolife, inc, Kennesaw, Ga). Removal of the BioGlue relieved the unexpected problem. PMID:19239687

Cavolli, Raif; Kaya, Kaan; Elalmis, Altay Omer

2009-01-01

152

Writing superiority in cued recall  

PubMed Central

In list learning paradigms with free recall, written recall has been found to be less susceptible to intrusions of related concepts than spoken recall when the list items had been visually presented. This effect has been ascribed to the use of stored orthographic representations from the study phase during written recall (Kellogg, 2001). In other memory retrieval paradigms, by contrast, either better recall for modality-congruent items or an input-independent writing superiority effect have been found (Grabowski, 2005). In a series of four experiments using a paired associate learning paradigm we tested (a) whether output modality effects on verbal recall can be replicated in a paradigm that does not involve the rejection of semantically related intrusion words, (b) whether a possible superior performance for written recall was due to a slower response onset for writing as compared to speaking in immediate recall, and (c) whether the performance in paired associate word recall was correlated with performance in an additional episodic memory recall task. We observed better written recall in the first half of the recall phase, irrespective of the modality in which the material was presented upon encoding. An explanation for this effect based on longer response latencies for writing and hence more time for memory retrieval could be ruled out by showing that the effect persisted in delayed response versions of the task. Although there was some evidence that stored additional episodic information may contribute to the successful retrieval of associate words, this evidence was only found in the immediate response experiments and hence is most likely independent from the observed output modality effect. In sum, our results from a paired associate learning paradigm suggest that superior performance for written vs. spoken recall cannot be (solely) explained in terms of additional access to stored orthographic representations from the encoding phase. Our findings rather suggest a general writing-superiority effect at the time of memory retrieval. PMID:24151483

Fueller, Carina; Loescher, Jens; Indefrey, Peter

2013-01-01

153

PROTEIN METABOLISM AND EXCHANGE AS INFLUENCED BY CONSTRICTION OF THE VENA CAVA  

PubMed Central

Constriction of inferior vena cava above the diaphragm is used to produce experimental ascites in the dog. This type of experimental ascites drains the body protein reserves, reduces the level of circulating plasma proteins, and in effect is an internal plasmapheresis. As the ascitic fluid is withdrawn and the proteins measured, we observe a production of ascitic protein (80–90 gm. per week) comparable to that removed by plasmapheresis (bleeding and replacement of red cells in saline). High protein diet tends to decrease the ascites but the protein content of the ascitic fluid may increase. Sodium chloride increases notably the volume of the ascites which accumulates and the total ascitic protein output increases. Sodium-free salt mixtures have a negative influence. High protein diet low in sodium salts gives minimal ascitic accumulation under these conditions. The question of circulation of the ascitic fluid is raised—how rapid is the absorption and the related accumulation? PMID:18858638

McKee, Frank W.; Schloerb, Paul R.; Schilling, John A.; Tishkoff, Garson H.; Whipple, George H.

1948-01-01

154

Sequential Venoplasty for Treatment of Inferior Vena Cava Stenosis Following Liver Transplant  

PubMed Central

Obstruction of the inferior vena cava (IVC) is a rare complication of liver transplantation with significant consequences including intractable ascites and hepatic dysfunction. Although venoplasty and stenting are effective in many cases, patients who fail first-line treatment may require surgical intervention or re-transplantation. Scheduled sequential balloon dilation, an approach frequently used to treat fibrotic, benign biliary strictures, but less commonly vascular lesions, may avert the need for such high-risk alternatives while achieving favorable clinical and angiographic response. Herein, we report the case of a 36-year-old woman with transplant-related, initially angioplasty-resistant IVC stenosis that was successfully treated with sequential balloon dilation. PMID:25337436

Parvinian, Ahmad; Gaba, Ron Charles

2014-01-01

155

Recurrent intravenous leiomyosarcoma of the uterus in the retrohepatic vena cava  

PubMed Central

Although intravenous extension of uterine leiomyosarcomas has been described, extension into the inferior vena cava (IVC) and right atrium, so-called ‘intravenous leiomyosarcomatosis (IVLS)’, is rare. To our knowledge only a few cases have been described in the literature. We describe a case of recurrent uterine leiomyosarcoma to the retrohepatic IVC. The patient was initially treated with total abdominal hysterectomy. Follow-up computed tomography a year later showed an extensive intravascular and intracardiac soft tissue mass treated with tumor extraction using cardiac bypass. Five years later she presented to our institution with a new retrohepatic caval mass treated with surgical resection and caval grafting. IVLS is a rare disease that is best treated with surgical resection even in the recurrent setting. The role of adjuvant therapy remains unclear. PMID:25204766

Mckenna, Logan R.; Jones, Edward L.; Jones, Teresa S.; Nydam, Trevor; Gajdos, Csaba

2014-01-01

156

Evaluation of inhibitory effect of phlorotannins from Ecklonia cava on triglyceride accumulation in adipocyte.  

PubMed

In the present study, a methanolic extract of Ecklonia cava and its solvent-partitioned fractions were evaluated for their antiadipogenic effect in 3T3-L1 adipocytes. One of them, the n-BuOH fraction, effectively reduced lipid accumulation and glucose consumption. In addition, the presence of the n-BuOH fraction in adipocytes suppressed the regulations of adipogenic transcription factors, PPAR? and SREBP1c, and adipogenic specific genes, FABP4, FABP1, FAS, LPL, HSL, and ACS1. Further purification of n-BuOH fractions led to the isolation of six phlorotannins (1-6). The six phlorotannins effectively suppressed triglyceride accumulation. Comparative analysis showed that lipid accumulation in adipocytes was dramatically attenuated in the presence of eckstolonol (4). PMID:23957842

Kim, Haejin; Kong, Chang-Suk; Lee, Jung Im; Kim, Hojun; Baek, Seungoh; Seo, Youngwan

2013-09-11

157

Concomitant reconstruction of infrarenal aorta and inferior vena cava after en bloc resection of retroperitoneal rhabdomyosarcoma.  

PubMed

Adult paratesticular rhabdomyosarcoma (PRMS) with invasion of the retroperitoneum and involvement of the infrarenal aorta and inferior vena cava (IVC) is rare. We describe a 23-year-old male diagnosed with PRMS in 2008, previously treated with right orchiectomy, chemotherapy, and radiation, who presented with new onset of lower back pain. Computed tomography (CT) scan revealed a 4.8 × 4.2 cm mass involving both the infrarenal aorta and the IVC. We resected the tumor en bloc with in situ reconstruction of the aorta utilizing a Dacron graft and the IVC with a bovine pericardium roll graft. His postoperative period was uneventful, and he was discharged on postoperative day 6 in stable condition. At 2-month follow-up, the patient recovered well from the surgery, patent grafts on CT scan with no clinical signs of lower extremity ischemia or edema, and he continues to receive cycles of chemotherapy. PMID:21914678

Anaya-Ayala, Javier E; Cheema, Zulfiqar F; Davies, Mark G; Lumsden, Alan B; Reardon, Michael J

2011-11-01

158

Resection of a Catecholamine-Elaborating Retroperitoneal Paraganglioma Invading the Inferior Vena Cava  

PubMed Central

Paragangliomas are rare tumors originating outside of the adrenal medulla which can be associated with catecholamine secretion or mass effect, one of which typically leads to their discovery. The differences between these tumors and traditional intra-adrenal pheochromocytomas are a subject of recent investigations. Standard of care therapy is medical management and surgical resection of the tumor. When tumors are biochemically active, medical optimization of the autonomic nervous system is a critical component to a safe, definitive resection. Tumors arising in the retroperitoneum present technical challenges for the surgeon as they are often large and difficult to access, making an oncologic resection much more difficult. Lastly, these tumors are mostly benign and rarely invade adjacent structures—an operative finding not always predicted by preoperative imaging—which, if present, adds significant complexity and risk to the resection. A case illustrating these challenges in the management of a biochemically active retroperitoneal paraganglioma invading the inferior vena cava follows. PMID:25610696

Mannina, E. M.; Xiong, Z.; Self, R.; Kandil, E.

2014-01-01

159

The Need for Anticoagulation Following Inferior Vena Cava Filter Placement: Systematic Review  

SciTech Connect

Purpose. To perform a systemic review to determine the effect of anticoagulation on the rates of venous thromboembolism (pulmonary embolus, deep venous thrombosis, inferior vena cava (IVC) filter thrombosis) following placement of an IVC filter. Methods. A comprehensive computerized literature search was performed to identify relevant articles. Data were abstracted by two reviewers. Studies were included if it could be determined whether or not subjects received anticoagulation following filter placement, and if follow-up data were presented. A meta-analysis of patients from all included studies was performed. A total of 14 articles were included in the final analysis, but the data from only nine articles could be used in the meta-analysis; five studies were excluded because they did not present raw data which could be analyzed in the meta-analysis. A total of 1,369 subjects were included in the final meta-analysis. Results. The summary odds ratio for the effect of anticoagulation on venous thromboembolism rates following filter deployment was 0.639 (95% CI 0.351 to 1.159, p = 0.141). There was significant heterogeneity in the results from different studies [Q statistic of 15.95 (p = 0.043)]. Following the meta-analysis, there was a trend toward decreased venous thromboembolism rates in patients with post-filter anticoagulation (12.3% vs. 15.8%), but the result failed to reach statistical significance. Conclusion. Inferior vena cava filters can be placed in patients who cannot receive concomitant anticoagulation without placing them at significantly higher risk of development of venous thromboembolism.

Ray, Charles E. [University of Colorado Denver and Health Sciences Center, Department of Radiology (United States)], E-mail: charles.ray@uchsc.edu; Prochazka, Allan [University of Colorado Health Sciences Center, Division of General Internal Medicine (United States)

2008-03-15

160

Medical malpractice and respondeat superior.  

PubMed

The legal concept of vicarious liability and the Doctrine of Respondeat Superior occurs when the servant (employee) commits a tort or civil wrong within the scope of employment and the master (employer) is held liable although the master may have done nothing wrong. In this article, legal cases are presented to emphasize the importance of these issues, which frequently involve physician extenders and physicians as employers in our current health care climate. Physicians need to be aware of this doctrine in the supervision of their staff and their day-to-day medical practice. PMID:12005015

Regan, Judith J; Regan, William M

2002-05-01

161

78 FR 21116 - Superior Supplier Incentive Program  

Federal Register 2010, 2011, 2012, 2013

...Incentive Program (SSIP...Superior Supplier Status...Research, Development and Acquisition...Preferred Supplier Program (PSP...Superior Suppliers. The panel...Research, Development and Acquisition...available to DoN program offices...

2013-04-09

162

The use of biological grafts for reconstruction of the inferior vena cava is a safe and valid alternative: results in 32 patients in a single institution  

PubMed Central

Background Resection and reconstruction of the inferior vena cava (IVC) is occasionally required in the surgical treatment of intra-abdominal tumours. IVC reconstruction can be performed with biological or synthetic graft material, with most centres preferring synthetic grafts. In spite of the potential advantages of biological grafts in terms of handling characteristics, and safety, very limited data are available about their use in patients requiring an IVC resection. Methods Medical records of 32 patients who underwent an IVC resection and reconstruction from 1990 and 2011 with autogenous peritoneo-fascial (N = 22) and bovine pericardial (N = 10) grafts were reviewed. Results A tangential resection with patch repair was performed in 10 patients, whereas in the remaining 22 it was necessary to resect and replace a segment or all of the retrohepatic IVC. A concomitant liver resection was performed in 14 patients, nephrectomy in 10 and pancreaticoduodenectomy in 2 patients. There were no acute or late complications related to graft thrombosis or infection. Three patients died as a consequence of multi-organ failure. Overall survival at 1 and 5 years was 78% and 48%, respectively. Conclusions The preferential use of synthetic grafts in IVC replacement is not evidence based. Selection of an appropriate prosthetic graft for IVC reconstruction should be based on the safety and its handling features. The use of biological grafts for IVC repair is a valid alternative to current synthetic materials and may in fact be superior in terms of biocompatability, ease of handling, reduced rate of infection and improved long-term patency without permanent anticoagulation. PMID:23458108

Pulitanó, Carlo; Crawford, Michael; Ho, Phong; Gallagher, James; Joseph, David; Stephen, Michael; Sandroussi, Charbel

2013-01-01

163

Superior semicircular canal occlusion—Transmastoid approach  

PubMed Central

INTRODUCTION The condition superior semi-circular canal dehiscence was first described by Minor et al. in 1998. PRESENTATION Of Case We describe a novel surgical approach to the management of superior semicircular canal dehiscence. Our surgical technique involves a transmastoid rather than middle cranial fossa approach to the superior semicircular canal. CONCLUSION We conclude that the transmastoid approach, if anatomically feasible, carries significant advantages compared to middle cranial fossa craniotomy approach for the management of superior semicircular canal dehiscence. PMID:22288041

Wijaya, C.; Dias, A.; Conlon, B.J.

2011-01-01

164

Management of a small bowel transplant with complicated central venous access in a patient with asymptomatic superior and inferior vena cava obstruction  

Microsoft Academic Search

During the past few years, small bowel transplantation (SBT) has become a realistic alternative for patients with irreversible intestinal failure who have or will develop severe complications from total parenteral nutrition (TPN). Transplantation can be associated with large fluid shifts and massive blood loss necessitating rapid infusions of large quantities of crystalloid and\\/or blood products. Invasive monitoring and large-bore venous

T. T Mims; T. M Fishbein; D. E Feierman

2004-01-01

165

Partially unroofed coronary sinus with persistent left superior vena cava: the utility of two and three-dimensional transesophageal echocardiography: a case report  

PubMed Central

Unroofed coronary sinus (URCS) is a rare cardiac anomaly, in which communication occurs between the coronary sinus (CS) and the left atrium (LA) because of partial or complete absence of the CS roof. A 30-year-old woman was scheduled for surgical closure of atrial septal defect, mitral valve repair and tricuspid annuloplasty. The intraoperative transesophageal echocardiography (TEE) revealed left-to-right shunt between the CS and the LA. The three-dimensional (3D) TEE confirmed the diagnosis of partially URCS. This defect was repaired with a pericardial patch. In this case, the 3D images of URCS, which were a helpful supplement to the 2D images, providing better visualization of the wall defect and more information regarding the size and location of the defect. The combined use of 2D and 3D images provides valuable information to aid in understanding the anatomy and morphology of this rare anomaly. PMID:25097740

Kanazawa, Shinya; Miyawaki, Ikuko; Yamazaki, Kazuo

2014-01-01

166

Balloon Dilation of the Superior Vena Cava (SVC) Resulting in SVC Rupture and Pericardial Tamponade: A Case Report and Brief Review  

SciTech Connect

Stent placement is an accepted primary treatment for SVC syndrome. Balloon dilation is frequently performed prior to stent placement. Although various stent-related hemorrhagic complications have been reported, as well as reports of iatrogenic catheter and guidewire perforations, there has been only one previous report of balloon dilation-related SVC rupture. We report a second case, including the clinical scenario, in the hope that should this complication occur, it might be recognized quickly and treated successfully.

Brown, Karen T., E-mail: brown6@mskcc.org; Getrajdman, George I. [Memorial Sloan Kettering Cancer Center, Department of Radiology (United States)

2005-04-15

167

INTERDEPENDENT SUPERIORITY AND INFERIORITY FEELINGS  

PubMed Central

It is postulated that in neurotic persons who have unrealistic feelings of superiority and inferiority the two are interdependent. This is a departure from the concept of previous observers that either one or the other is primary and its opposite is overcompensation. The author postulates considerable parallelism, with equal importance for each. He submits that the neurotic person forms two logic-resistant compartments for the two opposed self-estimates and that treatment which makes inroads of logic upon one compartment, simultaneously does so upon the other. Two examples are briefly reported. The neurotic benefits sought in exaggeration of capability are the same as those sought in insistence upon inferiority: Presumption of superiority at once bids for approbation and delivers the subject from the need to prove himself worthy of it in dreaded competition; exaggeration of incapability baits sympathy and makes competition unnecessary because failure is conceded. Some of the characteristics of abnormal self-estimates that distinguish them from normal are: Preoccupation with self, resistance to logical explanation of personality problems, inconsistency in reasons for beliefs in adequacy on the one hand and inadequacy on the other, unreality, rationalization of faults, and difficulty and vacillation in the selection of adequate goals. PMID:15390573

Ingham, Harrington V.

1949-01-01

168

Efficacy and safety of five injectable anesthetic regimens for chronic blood collection from the anterior vena cava of Guinea pigs.  

PubMed

Despite several published methods of inducing surgical anesthesia in guinea pigs, viable methods of anesthesia for blood collection from the vena cava are inadequate. We compared 5 anesthesia regimens and their efficacy in inducing anesthesia for blood sampling in guinea pigs: ketamine-xylazine (30 and 2.5 mg/kg) administered subcutaneously, intramuscularly, or intraperitoneally; pentobarbital (37 mg/kg) administered intraperitoneally; and medetomidine (0.5 mg/kg) administered intramuscularly. Parameters measured included time to onset of anesthesia, time to recovery from anesthesia, and complete blood count (CBC) and serum chemistry values. CBC values did not differ among the 5 regimens, but serum glucose, BUN, phosphorous, and creatine phosphokinase levels varied among groups. Based on our data, intraperitoneal ketamine-xylazine appears to emerge as a preferable injectable anesthetic regimen in guinea pigs for blood collection from the anterior vena cava. PMID:19049255

Dang, Vi; Bao, Saran; Ault, Alida; Murray, Catherine; McFarlane-Mills, Joy; Chiedi, Carmelo; Dillon, Marlon; Todd, John-Paul; Detolla, Louis; Rao, Srinivas

2008-11-01

169

Effect of feeding level on luteal function and progesterone concentration in the vena cava during early pregnancy in gilts.  

PubMed

This study assessed the effect of feeding level on progesterone concentration in the caudal vena cava during early pregnancy in gilts. Twenty-four Landrace gilts were allocated to either a high (2.8±0.02) or a low (1.5±0.01 kg day?¹) feeding level at Day 0 of pregnancy. Serial blood samples were collected every 15 min for 3 h before and 3 h after feeding on Days 6 and 9 of pregnancy. Embryo survival and development as well as in vitro luteal progesterone production were assessed at Day 10 of pregnancy. Progesterone concentration in the vena cava was pulsatile with gilts on the high feeding level having more pulses compared with Low gilts on Day 9 of pregnancy (P<0.05). On Day 6 the number of pulses did not differ significantly between treatments; however, the average progesterone concentration in the vena cava tended to be higher in the gilts on the high feeding level (P<0.10). Embryo survival at Day 10 was 92±3% for High gilts compared with 77±3% for Low gilts (P<0.05). No difference in embryo development between the treatments was seen. There was no difference between treatments in in vitro secretion of progesterone by luteal tissue. In conclusion, a high plane of nutrition positively affects progesterone secretion by the ovaries in early pregnancy. PMID:23464500

Athorn, R Z; Stott, P; Bouwman, E G; Chen, T Y; Kennaway, D J; Langendijk, P

2013-01-01

170

[Computerized three-dimensional reconstruction of the retrohepatic segment of inferior vena cava of a 20 mm human embryo].  

PubMed

The subdiaphragmatic venous drainage of the embryo is provided by the two caudal cardinal veins to which is added the subcardinal vein system, draining the mesonephros, the perispinal supracardinal veins and the umbilical and vitelline venous system. The anastomosis of certain segments of the embryonic venous structures and the disappearance of others are at the origin of the inferior vena cava. Since the 19th century, three-dimensional reconstruction of solid models from histological sections were developed. At present, the development of computerized three-dimensional reconstruction techniques allowed to operate a multitude of techniques of image processing and modeling in space. Three-dimensional reconstruction is a tool for teaching and research very useful in embryological studies because of the obvious difficulty of dissection and the necessity of introducing time as the fourth dimension in the study of organogenesis. This method represents a promising alternative compared to previous three-dimensional reconstruction techniques including Born technique. The aim of our work was to create a three-dimensional computer reconstruction of the retrohepatic segment of the inferior vena cava of a 20mm embryo from the embryo collection of Saints-Pères institute of anatomy (Paris Descartes university, Paris, France) to specify the path relative to the liver and initiate a series of computerized three-dimensional reconstruction that will follow the evolution of this segment of the inferior vena cava and this in a pedagogical and morphological research introducing the time as the fourth dimension. PMID:23756024

Abid, B; Douard, R; Hentati, N; Ghorbel, A; Delmas, V; Uhl, J-F; Chevallier, J-M

2013-06-01

171

Carbon cycling in Lake Superior  

NASA Astrophysics Data System (ADS)

Carbon (C) cycling in Lake Superior was studied within the Keweenaw Interdisciplinary Transport Experiment in Superior (KITES) project to assess (1) whether the lake is net heterotrophic, (2) sources, sinks and residence time for dissolved organic carbon (DOC), (3) importance of terrigenous organic C subsidies, and (4) factors limiting C flow through bacteria. During 3 years of fieldwork, measurements were made of spatial and temporal distributions of C pools and rates of photosynthesis, community respiration, and bacterial production. Measurements were made of the composition of dissolved organic matter (DOM), rates of DOM photolysis, lability of DOM toward microbial consumption, and river inputs of DOM. All measurements suggest the lake is net heterotrophic. The C:N ratios of DOM suggest that it is primarily of terrigenous origin, but other characteristics (size distribution, UV absorption) point to the presence of autochthonous DOM and to alteration of terrigenous material. The lake mass balance indicates that the residence time (˜8 years) of the DOC pool (17 Tg) is short relative to the hydrologic residence time (170 years). The known flux of terrigenous DOC (˜1 Tg/yr) is too low to support annual bacterial carbon demand (6-38 Tg/yr), but microbial respiration is the major sink for terrigenous DOC. A rapidly cycling, autochthonous DOC pool must exist. Microbial activity was correlated with temperature, phosphorus availability, and DOC concentration but not with photosynthesis rates. Measurements of respiration (˜40 Tg/yr), photosynthesis (2-7 Tg/yr), and bacterial production (0.5-2 Tg/yr) are not all mutually compatible and result in a discrepancy in the organic carbon budget.

Urban, N. R.; Auer, M. T.; Green, S. A.; Lu, X.; Apul, D. S.; Powell, K. D.; Bub, L.

2005-06-01

172

Challenging diagnostic and therapeutic modalities for leiomyosarcoma of inferior vena cava.  

PubMed

Leiomyosarcoma of the inferior vena cava (IVCL) is a rare malignant tumour originating from the smooth muscle cells of the media with intra- or extra-luminal growth. The type of the lesion is further divided into three levels in relation to hepatic and renal veins respectively. The aim of this review was to evaluate the results of surgical treatment of IVCL with special reference to the extent of its histological spread and to analyse the recent literature in order to provide an update on the current concepts of diagnostic and therapeutic management of this entity. IVCL's patients may present with non-specific complaints such as dyspnoea, malaise, weight loss, nausea, vomiting, fever and abdominal pain. Haematogenous metastasis is frequent. At a later stage, IVCL may also spread through lymphatic. Multiple diagnostic imaging techniques have been proposed for accurate preoperative diagnosis, including Doppler ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI), individually or in combination with cavography echocardiography or CT-guided biopsy. Despite recent research on the therapeutic strategies against IVCL, surgical resection appears the only potentially curative approach. Unfortunately, a mere minority of patients is eligible to undergo surgical intervention. In addition, surgical removal of IVCL does not necessarily guarantee patient's long-term survival. Alternative therapies, such as radio- and chemo-therapy often proved insufficient. Debate continues regarding the optimal management of the IVC after tumour resection, with primary repair, ligation and IVC reconstruction all have been utilized with varying success. PMID:25489949

Mastoraki, Aikaterini; Leotsakos, George; Mastoraki, Sotiria; Papanikolaou, Ioannis S; Danias, Nikolaos; Smyrniotis, Vasilios; Arkadopoulos, Nikolaos

2015-01-01

173

Duodenal perforation by an inferior vena cava filter in a polyarteritis nodosa sufferer  

PubMed Central

INTRODUCTION Inferior vena cava (IVC) filters are currently used in the management of pulmonary embolism (PE) and lower limb venous thromboembolism (VTE). Despite their widespread use, associated complications including duodenal perforation have been reported. PRESENTATION OF CASE We describe a unique case of duodenal perforation 2 years post IVC filter insertion in a patient with polyarteritis nodosa (steroid dependent) and thrombocytopenia secondary to chronic cyclophosphamide use. DISCUSSION IVC filters are commonly employed in the management of VTE. Associated complications have been reported including filter migration, fracture and adjacent organ perforation. There is growing consensus that temporary IVC filters should be retrieved as soon as possible with dedicated IVC filter registries to ensure patients are not lost to follow-up post insertion. CONCLUSION Duodenal perforation is a rare complication of IVC filter insertion. This case however illustrates the potentially catastrophic consequences of a relatively common endovascular procedure. Caution should be taken when considering the insertion of IVC filters in patients with longstanding vasculopathies who are on immunosuppressants. PMID:25437665

Dat, Anthony; McCann, Andrew; Quinn, John; Yeung, Shinn

2014-01-01

174

[A case of inferior vena cava thrombosis and acute pancreatitis in a patient with ulcerative colitis].  

PubMed

A 21-year-old man admitted complaining of sudden severe epigastric pain for 1 day. He had been diagnosed as ulcerative colitis (UC) and taking mesalazine for two months. UC was in nearly complete remission at admission. He never drank an alcohol, and serum amylase was 377 IU/L. CT scan showed inferior vena cava (IVC) thrombosis in addition to mild acute pancreatitis. To evaluate the cause of acute pancreatitis and IVC thrombosis, magnetic resonance cholangiopancreatogram (MRCP), endoscopic ultrasonogram (EUS), lower extremity Doppler ultrasonogram (US) and blood test of hypercoagulability including factor V, cardiolipin Ab, protein C, protein S1, antithrombin III, and anti phospholipids antibody were performed. There was no abnormality except mild acute pancreatitis and IVC thrombosis in all the tests. He was recommended to stop taking mesalazine and start having anticoagulation therapy. After all symptoms disappeared and amylase returned normal, rechallenge test with mesalazine was done. Flare-up of abdominal pain occurred and the elevation of serum amylase was observed. Ulcerative colitis came to complete remission with short-term steroid monotherapy. Acute pancreatitis and IVC thrombosis were completely resolved after 3-month anticoagulation therapy with no more mesalazine. We postulated that IVC thrombosis occurred due to hypercoagulable status of UC and intra-abdominal inflammation caused by mesalazine-induced pancreatitis. PMID:20962562

Shin, Do Hyun; Lee, Kwang Hyuk; Kim, Chi Hoon; Kim, Kap Hyun; Park, Sung Hyun; Chang, Dong Kyung; Lee, Jong Kun; Lee, Kyu Taek

2010-10-01

175

5-hydroxytryptamine-induced relaxation of neonatal porcine vena cava in vitro.  

PubMed

5-hydroxytryptamine (5-HT) caused concentration-dependent relaxation of isolated rings from porcine vena cava contracted with alpha-methyl 5-HT or prostaglandin F2 alpha. Relaxation was not blocked by propranolol (1 micron), atropine (1 micron), indomethacin (3 microns), mepyramine (1 micron), cimetidine (1 micron), or cocaine (10 microns). Further receptor analysis could not be performed by antagonism of the relaxant response but was possible using 5-HT induced increases in cyclic AMP. Methysergide (1 micron) but not cyproheptadine (0.1 micron), specifically antagonised the 5-HT induced increase in cyclic AMP with an estimated pA2 of 7.19. The alpha-methyl analogue of 5-HT, a potent agonist at M and D receptors, did not cause relaxation or elevate cyclic AMP. These results suggest that the 5-HT receptor described here is not of the classical M or D type and unlike that described thus far in the vasculature. This receptor shares some similarities with brain 5-HT1 receptors since both may be linked with adenylate cyclase. PMID:6205240

Trevethick, M A; Feniuk, W; Humphrey, P P

1984-07-30

176

Water soluble sulfated-fucans with immune-enhancing properties from Ecklonia cava.  

PubMed

Water-soluble sulfated fucans isolated from Ecklonia cava were fractionated using an anion-exchange chromatography to investigate their molecular characteristics and immunomodulating activities. The crude fucoidan extract and purified fractions (EF1, EF2, and EF3) consisted mostly of different ratios of neutral sugars, proteins, sulfates, uronic acids, and their monosaccharide compositions were also significantly different. The backbone of the most immunoenhancing fraction, EF2, was mainly linked by (1?3)-linked fucopyranosyl and (1?4)-linked mannopyranosyl residues with sulfates at C-4 of fucopyranosyl units. The molecular weights of the crude fucoidan extract and purified fractions ranged from 8.3×10(3) to 442.6×10(3)g/mol. The crude extract, EF1 and EF2 stimulated RAW264.7 cells to produce considerable amounts of nitric oxide and cytokines. The treatment of cells with the sulfated fucans induced the degradation of I?-B and the phosphorylation of MAPK in RAW264.7 cells, implying that they might stimulate RAW264.7 cells through the activation of NF-?B and MAPK pathways. PMID:24661888

Cao, Rong-An; Lee, YongJin; You, SangGuan

2014-06-01

177

Ecklonia cava Inhibits Glucose Absorption and Stimulates Insulin Secretion in Streptozotocin-Induced Diabetic Mice  

PubMed Central

Aims of study. Present study investigated the effect of Ecklonia cava (EC) on intestinal glucose uptake and insulin secretion. Materials and methods. Intestinal Na+-dependent glucose uptake (SGU) and Na+-dependent glucose transporter 1 (SGLT1) protein expression was determined using brush border membrane vesicles (BBMVs). Glucose-induced insulin secretion was examined in pancreatic ?-islet cells. The antihyperglycemic effects of EC, SGU, and SGLT1 expression were determined in streptozotocin (STZ)-induced diabetic mice. Results. Methanol extract of EC markedly inhibited intestinal SGU of BBMV with the IC50 value of 345??g/mL. SGLT1 protein expression was dose dependently down regulated with EC treatment. Furthermore, insulinotrophic effect of EC extract was observed at high glucose media in isolated pancreatic ?-islet cells in vitro. We next conducted the antihyperglycemic effect of EC in STZ-diabetic mice. EC supplementation markedly suppressed SGU and SGLT1 abundance in BBMV from STZ mice. Furthermore, plasma insulin level was increased by EC treatment in diabetic mice. As a result, EC supplementation improved postprandial glucose regulation, assessed by oral glucose tolerance test, in diabetic mice. Conclusion. These results suggest that EC play a role in controlling dietary glucose absorption at the intestine and insulinotrophic action at the pancreas contributing blood glucose homeostasis in diabetic condition. PMID:22645628

Kim, Hye Kyung

2012-01-01

178

Early and Late Retrieval of the ALN Removable Vena Cava Filter: Results from a Multicenter Study  

SciTech Connect

Retrieval of removable inferior vena cava (IVC) filters in selected patients is widely practiced. The purpose of this multicenter study was to evaluate the feasibility and results of percutaneous removal of the ALN removable filter in a large patient cohort. Between November 2003 and June 2006, 123 consecutive patients were referred for percutaneous extraction of the ALN filter at three centers. The ALN filter is a removable filter that can be implanted through a femoral/jugular vein approach and extracted by the jugular vein approach. Filter removal was attempted after an implantation period of 93 {+-} 15 days (range, 6-722 days) through the right internal jugular vein approach using the dedicated extraction kit after control inferior vena cavography. Following filter removal, vena cavograms were obtained in all patients. Successful extraction was achieved in all but one case. Among these successful retrievals, additional manipulation using a femoral approach was needed when the apex of the filter was close to the IVC wall in two patients. No immediate IVC complications were observed according to the postimplantation cavography. Neither technical nor clinical differences between early and late filter retrieval were noticed. Our data confirm the safety of ALN filter retrieval up to 722 days after implantation. In infrequent cases, additional endovenous filter manipulation is needed to facilitate extraction.

Pellerin, O., E-mail: olivier.pellerin@egp.aphp.f [Georges Pompidou European Hospital, Universite Paris 5 Rene Descartes, Cardiovascular Radiology Department (France); Barral, F. G. [CHU Bellevue, Service de Neuroradiologie (France); Lions, C. [CHU Lille, Service de Radiologie Cardio-Vasculaire (France); Novelli, L. [Hopital Europeen Georges Pompidou, Universite Paris 5 Rene Descartes, Service de Radiologie Cardio-Vasculaire (France); Beregi, J. P. [CHU Lille, Service de Radiologie Cardio-Vasculaire (France); Sapoval, M. [Hopital Europeen Georges Pompidou, Universite Paris 5 Rene Descartes, Service de Radiologie Cardio-Vasculaire (France)

2008-09-15

179

Polyphenol-Rich Fraction of Brown Alga Ecklonia cava Collected from Gijang, Korea, Reduces Obesity and Glucose Levels in High-Fat Diet-Induced Obese Mice  

PubMed Central

Ecklonia cava (E. cava) is a brown alga that has beneficial effects in models of type 1 and type 2 diabetes. However, the effects of E. cava extracts on diet-induced obesity and type 2 diabetes have not been specifically examined. We investigated the effects of E. cava on body weight, fat content, and hyperglycemia in high-fat diet- (HFD) induced obese mice and sought the mechanisms involved. C57BL/6 male mice were fed a HFD (60% fat) diet or normal chow. After 3 weeks, the HFD diet group was given extracts (200?mg/kg) of E. cava harvested from Jeju (CA) or Gijang (G-CA), Korea or PBS by oral intubation for 8 weeks. Body weights were measured weekly. Blood glucose and glucose tolerance were measured at 7 weeks, and fat pad content and mRNA expression of adipogenic genes and inflammatory cytokines were measured after 8 weeks of treatment. G-CA was effective in reducing body weight gain, body fat, and hyperglycemia and improving glucose tolerance as compared with PBS-HFD mice. The mRNA expression of adipogenic genes was increased, and mRNA expression of inflammatory cytokines and macrophage marker gene was decreased in G-CA-treated obese mice. We suggest that G-CA reduces obesity and glucose levels by anti-inflammatory actions and improvement of lipid metabolism. PMID:22844333

Park, Eun Young; Kim, Eung Hwi; Kim, Mi Hwi; Seo, Young Wan; Lee, Jung Im; Jun, Hee Sook

2012-01-01

180

Biomechanics of superior oblique Z-tenotomy  

PubMed Central

Background A recent report suggests that 70%-80% Z-tenotomy of the superior oblique tendon is necessary to effectively treat A-pattern strabismus associated with over depression in adduction. To clarify the clinical effect, we compared the biomechanics of Z-tenotomy on the superior oblique tendon, superior rectus tendon, and isotropic latex material. Methods Fresh bovine superior oblique tendons were trimmed to 20 mm × 10 mm dimensions similar to human superior oblique tendon and clamped in a microtensile load cell under physiological conditions of temperature and humidity. Minimal preload was applied to avoid slackness. Tendons were elongated until failure following Z-tenotomies, made from opposite tendon sides, spaced 8 mm apart and each encompassing 0%, 20%, 40%, 50%, 60%, or 80% tendon width. Digitally sampled failure force was monitored using a precision strain gauge. Control experiments were performed in similar-sized specimens of bovine superior rectus tendon and isotropic latex. Results Progressively increasing Z-tenotomy of latex caused a linearly graded reduction in force. In contrast, Z-tenotomy of up to 50% in superior oblique and superior rectus tendons caused nonlinear reduction in force transmission that reached a negligible value at 50% tenotomy and greater. Conclusions Z-tenotomy up to 50% progressively reduces extraocular tendon force transmission, but Z-tenotomy of ?50% is biomechanically equivalent in vitro to complete tenotomy. PMID:24321425

Shin, Andrew; Yoo, Lawrence; Demer, Joseph L.

2013-01-01

181

Superior limbic keratoconjunctivitis in identical twins.  

PubMed

The first two cases of superior limbic keratoconjunctivitis occurring in identical twins are reported. In both cases the symptoms began 16 years ago and have never permanently responded to numerous topical medications or to bilateral resection of the superior bulbar conjunctiva. PMID:1587136

Darrell, R W

1992-05-01

182

Vitamin A eyedrops for superior limbic keratoconjunctivitis.  

PubMed

We treated 12 patients with superior limbic keratoconjunctivitis with topical vitamin A (retinol palmitate) eyedrops. After a follow-up period of at least three months, this therapy was found to be effective, to a varying extent, in ten patients (83%). Superior limbic keratoconjunctivitis lesions did not recur in these patients as long as topical application was continued. PMID:3285694

Ohashi, Y; Watanabe, H; Kinoshita, S; Hosotani, H; Umemoto, M; Manabe, R

1988-05-15

183

Immunological aspects of superior limbic keratoconjunctivitis.  

PubMed

Three patients with superior limbic keratoconjunctivitis (SLK) were treated by conjunctival resection. The results of immunological studies and histological examination of the excised tissue were unremarkable; none of seven criteria of antibody dependence were met. We found no specific immune defects in three patients with superior limbic keratoconjunctivitis. PMID:378334

Eiferman, R A; Wilkins, E L

1979-04-01

184

ESCOLA SUPERIOR DE EDUCAO DE TORRES NOVAS  

E-print Network

ESCOLA SUPERIOR DE EDUCA��O DE TORRES NOVAS HIGHER SCHOOL OF EDUCATION OF TORRES NOVAS 1 LOOKING EMPRESA COMPANY NAME ESCOLA SUPERIOR DE EDUCA��O DE TORRES NOVAS HIGHER SCHOOL OF EDUCATION OF TORRES NOVAS PAÍS COUNTRY PORTUGAL REGI�O REGION TORRES NOVAS - SANTAR�M PÁGINA ELECTR�NICA WEBSITE WWW

Herrmann, Samuel

185

The relationship between inferior vena cava diameter measured by bedside ultrasonography and central venous pressure value  

PubMed Central

Objective: We aimed to present inferior vena cava (IVC) diameter as a guiding method for detection of relationship between IVC diameter measured noninvasively with the help of ultrasonography (USG) and central venous pressure (CVP) and evaluation of patient's intravascular volume status. Methods: Patients over the age of 18, to whom a central venous catheter was inserted to their subclavian vein or internal jugular vein were included in our study. IVC diameter measurements were recorded in millimeters following measurement by the same clinician with the help of USG both at the end-inspiratory and end-expiratory phase. CVP measurements were viewed on the monitor by means of piezoelectric transducer and recorded in mmHg. SPSS 18.0 package program was used for statistical analysis of data. Results: Forty five patients were included in the study. The patients had the diagnosis of malignancy (35.6%), sepsis (13.3%), pneumonia, asthma, chronic obstructive pulmonary disease (11.1%). 11 patients (24.4%) required mechanical ventilation while 34 (75.6%) patients had spontaneous respiration. In patients with spontaneous respiration, a significant relationship was found between IVC diameters measured by ultrasonography at the end of expiratory and inspiratory phases and measured CVP values at the same phases (for expiratory p = 0.002, for inspiratory p= 0.001). There was no statistically significant association between IVC diameters measured by ultrasonography at the end of expiration and inspiration and measured CVP values at the same phases in mechanically ventilated patients. Conclusions: IVC diameter measured by bedside ultrasonography can be used for determination of the intravascular volume status of the patients with spontaneous respiration. PMID:24772133

Citilcioglu, Serenat; Sebe, Ahmet; Oguzhan Ay, Mehmet; Icme, Ferhat; Avci, Akkan; Gulen, Muge; Sahan, Mustafa; Satar, Salim

2014-01-01

186

Living donor liver transplantation with replacement of vena cava for Echinococcus alveolaris: A case report?  

PubMed Central

INTRODUCTION There is no medical treatment for alveolar echinococceal disease (AED) of liver till now. Curative surgical resection is optimal treatment but in most advanced cases curative resection can’t be done. Liver transplantation is accepted treatment option for advanced AED. AED in some case invade surrounding tissue especially inferior vena cava (IVC). Advanced AED with invasion to IVC can be treated with deceased liver transplantation. Although living donor liver transplantation is very difficult to perform in patients with advanced AED with resected IVC, it come into consideration, since there is very few cadaveric liver. PRESENTATION OF CASE Here we present a case with advanced stage of AED of liver which cause portal hypertension and cholestasis. AED invaded surrounding tissue, right diaphragm, both lobes of liver and retrohepatic part of IVC. Invasion of IVC forced us to make resection of IVC and reconstruction with cryopreserved venous graft to reestablish blood flow. After that a living donor liver transplantation was done. DISCUSSION Curative surgery is the first-choice option in all operable patients with AED of liver. Advanced stage of AED like chronic jaundice, liver abscess, sepsis, repeated attacks of cholangitis, portal hypertension, and Budd-Chiari syndrome may be an indication for liver transplantation. In some advanced stage AED during transplantation replacement of retrohepatic part of IVC could be done with artificial vascular graft, cadaveric aortic and caval vein graft. CONCLUSION Although living donor liver transplantation with replacement of IVC is a very difficult operation, it should be considered in the management of advanced AED of liver with IVC invasion because of the rarity of deceased liver. PMID:24584043

Mamedov, Ruslan; Novruzov, Namig; Baskiran, Adil; Yetisir, Fahri; Unal, Bulent; Ayd?n, Cemalett?n; Bayramov, Nuru; Kayaalp, Cuneyt; Yilmaz, Sezai

2014-01-01

187

Treatment of Budd-Chiari syndrome with inferior vena cava thrombosis  

PubMed Central

The aim of this study was to evaluate the initial results of 41 patients with Budd-Chiari syndrome (BCS) with inferior vena cava (IVC) thrombosis, with regard to the clinical safety and feasibility of the therapeutic approaches selected according to the classification of the condition. Forty-one patients with BCS and IVC thrombosis were admitted for retrospective analysis. All 41 patients were classified as having one of three types of BCS. Interventional therapy was used successfully in 28 patients (68.3%), 7 patients (17.1%) were given conservative treatment and 6 patients (14.6%) were treated with surgical shunts. The interventional approach was used in 29 patients in total and was successful in 28 patients (all those of types I and II, and 3 of the 4 patients of type III with acute thrombosis; 96.6%). None of these 28 patients had pulmonary embolism, pericardial tamponade or intra-abdominal bleeding. After 1–5 years, 4 patients (9.8%) had a second dilation of the IVC. In the 7 cases treated in a conservative manner, 2 cases succumbed to upper gastrointestinal bleeding and 1 case succumbed to liver and kidney failure. This study indicates that the classification of BCS patients with IVC thrombosis is helpful in selecting a therapeutic approach. Interventional therapy is the first therapeutic choice for BCS patients with IVC thrombosis of type I, type II or type III with acute thrombosis. For the patients of type III with an obsolete thrombus, surgical shunts or conservative treatment are the main therapeutic methods. PMID:23596497

WANG, RUIHUA; MENG, QINGYI; QU, LIFENG; WU, XUEJUN; SUN, NIANFENG; JIN, XING

2013-01-01

188

Effect of Different Suprahepatic Vena Cava Reconstruction Methods on the Hemodynamics of Rats after Liver Transplantation  

PubMed Central

Background There are few studies on the hemodynamic changes after orthotopic liver transplantation in rats. In this study, we aimed to evaluate the effect of different suprahepatic vena cava (SHVC) reconstruction methods on the hemodynamics of rats after liver transplantation. Materials and Methods Three rat liver transplantation groups were created according to the SHVC reconstruction method: Kamada’s two-cuff technique, a modified veno-lined stent technique, and Harihara’s three-cuff technique. Ten rats of similar weight were grouped as the control. Anatomical, ultrasonic, and hemodynamic parameters and the microcirculation of the liver were measured after transplantation. The detailed operation time, operative complications, and animal survival were recorded. Results All the recipients showed portal hypertension one month after transplantation. The portal hypertension in the group with the modified veno-lined stent technique was the most severe. The value measured with real-time elastography was significantly higher in the recipients using the modified veno-lined stent technique than in the other two groups (P<0.01). There was no difference in the graft microcirculation after reperfusion among the three groups. The survival rate of the three groups displayed no difference, but the modified veno-lined stent technique led to more venous complications than the other two techniques. Conclusions The hemodynamics after liver transplantation in rats is determined not only by the cuff used for portal vein reconstruction but also by the cuff or stent for the SHVC. Some SHVC reconstruction methods, such as the modified veno-lined stent technique, Miyata’s or Settaf’s three-cuff techniques, significantly affect the hemodynamics. PMID:24023763

Wang, Hongdong; Li, Chonghui; Hu, Jianjun; Xu, Hongbin; Ji, Xu; Wang, Xiaofeng; Wang, Xuedong; Luo, Yukun; Li, Hailin; Xu, Kesen; Ye, Sheng; Zhang, Aiqun; Dong, Jiahong

2013-01-01

189

Idiopathic Thrombosis of the Inferior Vena Cava and Bilateral Femoral Veins in an Otherwise Healthy Male Soldier  

PubMed Central

Thrombosis of the inferior vena cava is less common than deep venous thrombosis of the lower extremities, particularly in the absence of an obvious congenital caval abnormality or hypercoagulable state. We present a case of IVC thrombosis in an otherwise healthy and active 28-year-old male soldier secondary to dehydration and venous webbing. IVC thrombosis is an uncommon and underrecognized condition; in this case, the patient's caval thrombosis was initially mistaken for acute back strain. Prompt recognition is necessary to minimize long-term sequelae. PMID:24187556

Gordon, Sarah; Kerns, Tamie; Londeree, William; Ching, Brian

2013-01-01

190

Two stage surgical management of the Budd-Chiari syndrome associated with obstruction of the inferior vena cava.  

PubMed

A new, staged surgical approach to the treatment of Budd-Chiari syndrome complicated by inferior vena caval obstruction has been described. The first stage consists of a mesoatrial shunt. After an interval to allow hepatic decongestion, re-establishment of caval flow and overall improvement in the status of the patient, a portacaval shunt is established and the mesoatrial shunt removed. Such a staged procedure produced an excellent result in the patient reported upon in this study and represents a treatment option in similar patients with Budd-Chiari syndrome complicated by obstruction of the inferior vena cava. PMID:6463819

Warren, W D; Potts, J R; Fulenwider, J T; Millikan, W J; Henderson, J M

1984-08-01

191

Congenital anomaly of the inferior vena cava and factor V Leiden mutation predisposing to deep vein thrombosis  

PubMed Central

A previously healthy 21-year-old man presented with back pain, bilateral extremity pain, and right lower extremity weakness, paresthesias, and swelling. Sonographic examination revealed diffuse deep vein thrombosis (DVT) in the femoral and popliteal venous system. CT imaging revealed hypoplasia of the hepatic inferior vena cava (IVC) segment with formation of multiple varices and collateral veins around the kidneys. Hematologic workup also discovered a factor V Leiden mutation, further predisposing the patient to DVT. The rare, often overlooked occurrence of attenuated IVC, especially in the setting of hypercoagulable state, can predispose patients to significant thrombosis. PMID:25395858

Lamparello, Brooke M; Erickson, Cameron R; Kulthia, Arun; Virparia, Vasudev; Thet, Zeyar

2014-01-01

192

Catheter-Directed Thrombolysis of Inferior Vena Cava Thrombosis in a 13-Day-Old Neonate and Review of Literature  

SciTech Connect

Complete inferior vena cava thrombosis (IVC) in neonates is uncommon, but may cause significant morbidity. A 13-day-old neonate suffered IVC thrombosis secondary to antithrombin III deficiency, possibly contributed to by a mutation in the methyl tetrahydrofolate reductase gene. Catheter-directed thrombolysis (CDT) with recombinant tissue plasminogen activator (rt-PA, Alteplase) was used successfully to treat extensive venous thrombosis in this neonate without complications. We also review the literature on CDT for treatment of IVC thrombosis in critically ill neonates and infants.

Khan, Jawad U. [Johns Hopkins University School of Medicine, Russell H. Morgan Department of Radiology and Radiological Science (United States); Takemoto, Clifford M.; Casella, James F. [Johns Hopkins University School of Medicine, Department of Pediatrics (United States); Streiff, Michael B. [Johns Hopkins University School of Medicine, Department of Medicine (United States); Nwankwo, Ikechi J.; Kim, Hyun S., E-mail: sikhkim@jhmi.ed [Johns Hopkins University School of Medicine, Russell H. Morgan Department of Radiology and Radiological Science (United States)

2008-07-15

193

Nickel hypersensitivity in patients with inferior vena cava filters: case report and literature and MAUDE database review.  

PubMed

Placement of a prophylactic retrievable inferior vena cava (IVC) filter was requested in a 73-year-old woman with nickel hypersensitivity resulting in a clinical dilemma. Given that all retrievable filters contain nickel, the published literature and the Manufacturer and User Facility Device Experience (MAUDE) database were reviewed; no documented case of IVC filter placement in a patient with nickel hypersensitivity or reported hypersensitivity reaction in a patient after IVC filter placement could be identified. This article presents the uneventful course of the case described and a review of the literature and recommendations on use of nickel-containing devices in patients with nickel hypersensitivity. PMID:24954605

Morshedi, Maud M; Kinney, Thomas B

2014-08-01

194

Use of a Trellis Device for Endovascular Treatment of Venous Thrombosis Involving a Duplicated Inferior Vena Cava  

SciTech Connect

Congenital anomalies of the inferior vena cava (IVC) are increasingly recognized with CT and venography techniques. Although many patients with IVC anomalies are asymptomatic, recent studies have suggested an association with venous thromboembolism. We report the case of a 62-year-old woman with extensive venous clot involving the infrarenal segment of a duplicated left IVC who underwent pharmacomechanical thrombectomy and tissue plasminogen activator catheter-directed thrombolysis with complete deep venous thrombosis resolution. To our knowledge this is the first reported case in the English literature of the use of a Trellis thrombectomy catheter in the setting of duplicated IVC.

Saettele, Megan R., E-mail: SaetteleM@umkc.edu [University of Missouri, Kansas City, Department of Radiology, Saint Luke's Hospital (United States); Morelli, John N., E-mail: dr.john.morelli@gmail.com [Texas A and M University Health Science Center, Department of Radiology, Scott and White Clinic and Hospital (United States); Chesis, Paul; Wible, Brandt C. [University of Missouri, Kansas City, Department of Interventional Radiology, Saint Luke's Hospital (United States)] [University of Missouri, Kansas City, Department of Interventional Radiology, Saint Luke's Hospital (United States)

2013-12-15

195

The effects of dexmedetomidine administration on the pulmonary artery pressure and the transpulmonary pressure gradient after the bidirectional superior cavopulmonary shunt.  

PubMed

The hemodynamic effects of dexmedetomidine (DEX) on pulmonary artery pressure (PAP) are not fully understood in patients with a single-ventricle physiology. The objective of this retrospective study was to characterize the effect of perioperative DEX infusion on PAP and the transpulmonary pressure gradient after a bidirectional superior cavopulmonary shunt (BCPS) operation. We retrieved physiologic data including the heart rate, incidence of cardiac pacing, systolic and diastolic arterial blood pressure (ABP), and superior vena cava (SVC) and inferior vena cava (IVC) pressures from the medical records of all patients <12 months of age who underwent a BCPS operation. Patients with an additional Norwood or Damus-Kaye-Stansel procedure, those with additional pulmonary blood flow, and those without both a SVC and an IVC catheter were excluded from the present study. Following the BCPS operation, the SVC pressure is equivalent to the PAP. Similarly, the IVC pressure is equivalent to the common atrial pressure (CAP). Accordingly, we can directly assess the transpulmonary pressure gradient, defined as the difference between the PAP and the CAP, using simultaneous SVC and IVC pressure measurements. Twenty-nine patients were included in the present study. We did not find any increase in the PAP, CAP, PAP/systolic ABP ratio, or the transpulmonary pressure gradient as of 6 h after admission to the intensive care unit when the patients were treated with DEX infusion at a median (interquartile ranges) dose of 0.6 mcg/kg/h (0.4, 0.64 mcg/kg/h). We concluded that the administration of DEX to children with a single-ventricle physiology is acceptable. PMID:25113519

Nishibe, Shinichi; Imanishi, Hirokazu; Mieda, Tsutomu; Tsujita, Miki

2015-01-01

196

Effects of the Addition of Ecklonia cava Powder on the Selected Physicochemical and Sensory Quality of White Pan Bread  

PubMed Central

Physicochemical properties and consumer perception of white pan bread as influenced by the addition of Ecklonia cava powder (ECP) were investigated. Freeze-dried Ecklonia cava were ground, sieved through a laboratory sieve and a fraction with particles less than 250 ?m was used. Amount of ECP added (0~3%) to the bread was found to affect the bread quality significantly (P<0.05). pH, bread height, and volume of the control was significantly higher than others (P<0.05) and decreased significantly (P<0.05) with the addition of ECP. Moisture content showed no significant differences (P>0.05). There were distinctive color changes with the addition of the powder: L*- and a*-values decreased but b*-value increased significantly (P<0.05). The hardness of bread was found to increase but both cohesiveness and springiness showed a reverse trend with the addition of the powder. Consumer acceptance test indicated that ECP content 1% on wheat flour could be the recommended supplementation level for the consumers without sacrificing sensory quality. PMID:24551832

Lee, Jun Ho; Choi, Dong Won

2013-01-01

197

Further characterization of the 5-HT receptor mediating vascular relaxation and elevation of cyclic AMP in porcine isolated vena cava.  

PubMed Central

1. 5-Hydroxytryptamine (5-HT) and 5-carboxamidotryptamine (5-CT) produce both smooth muscle relaxation and elevation of tissue adenosine 3':5'-cyclic monophosphate (cyclic AMP) levels in isolated rings of neonatal porcine vena cava. We now present studies attempting to characterize in more detail the 5-HT receptor mediating these responses. 2. Both 5-HT and 5-CT relaxed porcine isolated vena cava rings (EC50 values 200 nM and 4 nM respectively) and elevated tissue cyclic AMP levels (EC50 values 1500 nM and 16 nM respectively). For both responses 5-CT was approximately 50-100 fold more potent than 5-HT. 3. Both 5-CT-induced smooth muscle relaxation and cyclic AMP elevation were potently and specifically antagonized to a similar extent by methiothepin, methysergide and spiperone. 4. At concentrations up to 1 microM, 8-hydroxy-2-(di-n-propylamino) tetralin, buspirone, ipsapirone, n,n-dipropyl-5-CT, cyanopindolol, RU24969, ketanserin, GR38032 and GR43175 were devoid of both agonist and antagonist activity for both responses. 5. These findings suggest that the same 5-HT1-like receptor mediates both smooth muscle relaxation and elevation of cyclic AMP. This receptor is unlike any known 5-HT1 ligand binding site or adenylate cyclase-coupled 5-HT receptor in brain tissues. PMID:2541857

Sumner, M. J.; Feniuk, W.; Humphrey, P. P.

1989-01-01

198

Superior semicircular canal dehiscence : auditory mechanisms  

E-print Network

Superior semicircular canal dehiscence (SCD) syndrome is a recently defined clinical disorder in which patients present to the clinic with vestibular symptoms, auditory symptoms, or both. Understanding the effect of SCD, ...

Songer, Jocelyn Evelyn

2006-01-01

199

Space superiority: a call to space warriors  

Microsoft Academic Search

This essay1 discusses the importance of developing space superiority campaigns for future warfare success. It provides strategists with a coercion theory-based conceptual framework to provide a broader range of coercion mechanisms than has traditionally been offered. To selectively neutralize space systems, space strategists must move beyond the Cold War's spacecraft destruction-only focus and employ space superiority campaigns composed of a

C. A. S. McKintey

1997-01-01

200

Universidad Autnoma de Madrid Escuela Politcnica Superior  

E-print Network

Autónoma de Madrid, Spain Gonzalo Martínez Muñoz Universidad Autónoma de Madrid, Spain Arjen de Vries DelftUniversidad Autónoma de Madrid Escuela Politécnica Superior Departamento de Ingeniería Informática de Ingeniería Informática Escuela Politécnica Superior Universidad Autónoma de Madrid, Spain

Bellogin, Alejandro

201

Surgical management of hepatocellular carcinoma with tumor thrombi in the inferior vena cava or right atrium  

PubMed Central

Background The prognosis for advanced hepatocellular carcinoma (HCC) with tumor thrombi in the inferior vena cava (IVC) or right atrium (RA) is poor, and there is no established effective treatment for this condition. Thus study aimed to evaluate the efficacy of surgical resection and prognosis after surgery for such cases. Methods Between January 1990 and December 2012, 891 patients underwent hepatectomy for HCC at our institution. Of these, 13 patients (1.5%) diagnosed with advanced HCC with tumor thrombi in the IVC or RA underwent hepatectomy and thrombectomy. Data detailing the surgical outcome were evaluated and recurrence-free and overall survival rates were calculated using the Kaplan-Meier method. Results Seven patients had an IVC thrombus and six had an RA thrombus. Extra-hepatic metastasis was diagnosed in 8 of 13 patients. Surgical procedures included three extended right lobectomies, three extended left lobectomies, five right lobectomies, and two sectionectomies. Right adrenal gland metastases were excised simultaneously in two patients. All IVC thrombi were removed under hepatic vascular exclusion and all RA thrombi were removed under cardiopulmonary bypass (CPB). Four patients (30.8%) experienced controllable postoperative complications, and there was no surgical mortality. The mean postoperative hospital stay for patients with IVC and RA thrombi was 23.6 ± 12.5 days and 21.2 ± 4.6 days, respectively. Curative resection was performed in 5 of 13 cases. The 1- and 3-year overall survival rates were 50.4%, and 21.0%, respectively, and the median survival duration was 15.3 months. The 1- and 3-year overall survival rates for patients who underwent curative surgical resection were 80.0% and 30.0%, respectively, with a median survival duration of 30.8 months. All patients who underwent curative resection developed postoperative recurrences, with a median recurrence-free survival duration of 3.8 months. The 1-year survival rate for patients who underwent noncurative surgery and had residual tumors was 29.2%, with a median survival duration of 10.5 months. Conclusions Aggressive surgical resection for HCC with tumor thrombi in the IVC or RA can be performed safely and may improve the prognoses of these patients. However, early recurrence and treatment for recurrent or metastatic tumors remain unresolved issues. PMID:24093164

2013-01-01

202

Physiologic Effect of Stent Therapy for Inferior Vena Cava Obstruction Due to Malignant Liver Tumor  

SciTech Connect

Purpose. To understand systemic the influence of stent therapy for inferior vena cava (IVC) obstruction due to advanced liver tumor. Methods. Seven patients with symptomatic IVC obstruction due to advanced primary (n 4) or secondary (n = 3) liver tumor were subjected to stent therapy. Enrollment criteria included high IVC pressure over 15 mmHg and the presence of edema and ascites. Z-stents were deployed using coaxial sheath technique via femoral venous puncture. Physiologic and hematobiochemical parameters were analyzed. Results. All procedures were successful, and the stents remained patent until patient death. Promptly after stent placement, the IVC flow recovered, and the venous blood pressure in the IVC below the obstruction level showed a significant decrease from 20.8 {+-} 1.2 mmHg (mean {+-} SE) to 10.7 {+-} 0.7 mmHg (p < 0.01). Transient mild increase of right atrial pressure was observed in 1 patient. During the following week prominent diuresis was observed in all patients. Mean urine output volume in the 3 days before the stent therapy was 0.81 {+-} 0.09 l/day compared with 2.1 {+-} 0.2 l/day (p < 0.01) in the 3 days after. The edema and ascites decreased in all patients. The caval pressure change correlated well (r > 0.6) with the urine volume increase, and with the decreased volume of edema and ascites. The urine volume increase correlated well with the decrement of edema, but not with that of ascites. Improvements for various durations in the levels of blood urea nitrogen, serum creatinine, lactate dehydrogenase, fibrinogen, and platelet count were found (p < 0.05). These hematobiochemical changes were well correlated with each other and with the decrement of ascites. Two patients showed a low blood sodium level of 128.5 mEq/l after intensive natriuresis, and one of them died on day 21 with hepatic failure, which was interpreted as maladaptation aggravation. The mean survival time was 94.1 {+-} 34.1 days (mean {+-} SD), ranging from 21 to 140 days after stent treatment. Conclusion. The stent therapy for IVC obstruction due to malignant liver tumors was followed by a series of physiologic and hematobiochemical consequences, most of them favorable but some possibly unfavorable. Rational interpretations and predictions of sequelae based on physiologic science including cardiology, hepatology, and nephrology would facilitate the best management of stent therapy for malignant IVC obstruction.

Kishi, Kazushi [Wakayama Medical University, Department of Radiology (Japan)], E-mail: kkishi@wakayama-med.ac.jp; Sonomura, Tetsuo [Kishiwada Tokushukai Hospital, Department of Radiology (Japan); Fujimoto, Hisashi [Wakayama Medical University, Department of Emergency and Critical Care Medicine (Japan); Kimura, Masashi; Yamada, Katsuya; Sato, Morio [Wakayama Medical University, Department of Radiology (Japan); Juri, Masanobu [Saiseikai Wakayama Hospital, Department of Surgery (Japan)

2006-02-15

203

Use of Retrievable Compared to Permanent Inferior Vena Cava Filters: A Single-Institution Experience  

SciTech Connect

The purpose of this study was to review the use, safety, and efficacy of retrievable inferior vena cava (IVC) filters in their first 5 years of availability at our institution. Comparison was made with permanent filters placed in the same period. A retrospective review of IVC filter implantations was performed from September, 1999, to September, 2004, in our department. These included both retrievable and permanent filters. The Recovery nitinol and Guenther tulip filters were used as retrievable filters. The frequency of retrievable filter used was calculated. Clinical data and technical data related to filter placement were reviewed. Outcomes, including pulmonary embolism, complications associated with placement, retrieval, or indwelling, were calculated. During the study period, 604 IVC filters were placed. Of these, 97 retrievable filters (16%) were placed in 96 patients. There were 53 Recovery filter and 44 Tulip filter insertions. Subjects were 59 women and 37 men; the mean age was 52 years, with a range of from 18 to 97 years. The placement of retrievable filters increased from 2% in year 1 to 32% in year 5 of the study period. The total implantation time for the permanent group was 145,450 days, with an average of 288 days (range, 33-1811 days). For the retrievable group, the total implantation time was 21,671 days, with an average of 226 days (range, 2-1217 days). Of 29 patients who returned for filter retrieval, the filter was successfully removed in 28. There were 14 of 14 successful Tulip filter retrievals and 14 of 15 successful Recovery filter retrievals. In one patient, after an indwelling period of 39 days, a Recovery nitinol filter could not be removed secondary to a large clot burden within the filter. For the filters that were removed, the mean dwell time was 50 days for the Tulip type and 20 days for the Recovery type. Over the follow-up period there was an overall PE incidence of 1.4% for the permanent group and 1% for the retrieval group. In conclusion, there was an increase in the use of retrievable filters over the study period and an overall increase in the total number of filters implanted. The increased use of these filters appeared to be due to expanded indications predicated by their retrievability. Placement and retrieval of these filters have a low risk of complications, and retrievable filters appeared effective, as there was low rate of clinically significant pulmonary embolism associated with these filters during their indwelling time.

Ha, Thuong G. Van [University of Chicago, Department of Radiology, Section of Vascular and Interventional Radiology (United States)], E-mail: tgvanha@uchicago.edu; Chien, Andy S. [Pritzker School of Medicine, University of Chicago (United States); Funaki, Brian S.; Lorenz, Jonathan [University of Chicago, Department of Radiology, Section of Vascular and Interventional Radiology (United States); Piano, Giancarlo [University of Chicago, Department of Surgery (United States); Shen, Maxine [Pritzker School of Medicine, University of Chicago (United States); Leef, Jeffrey [University of Chicago, Department of Radiology, Section of Vascular and Interventional Radiology (United States)

2008-03-15

204

British Society of Interventional Radiology (BSIR) Inferior Vena Cava (IVC) Filter Registry  

SciTech Connect

Purpose: The British Society of Interventional Radiology (BSIR) Inferior Vena Cava (IVC) Filter Registry was produced to provide an audit of current United Kingdom (UK) practice regarding placement and retrieval of IVC filters to address concerns regarding their safety. Methods: The IVC filter registry is a web-based registry, launched by the BSIR on behalf of its membership in October 2007. This report is based on prospectively collected data from October 2007 to March 2011. This report contains analysis of data on 1,434 IVC filter placements and 400 attempted retrievals performed at 68 UK centers. Data collected included patient demographics, insertion and retrieval data, and patient follow-up. Results: IVC filter use in the majority of patients in the UK follows accepted CIRSE guidelines. Filter placement is usually a low-risk procedure, with a low major complication rate (<0.5 %). Cook Gunther Tulip (560 filters: 39 %) and Celect (359 filters: 25 %) filters constituted the majority of IVC filters inserted, with Bard G2, Recovery filters, Cordis Trapease, and OptEase constituting most of the remainder (445 filters: 31 %). More than 96 % of IVC filters deployed as intended. Operator inexperience (<25 procedure) was significantly associated with complications (p < 0.001). Of the IVC filters initially intended for temporary placement, retrieval was attempted in 78 %. Of these retrieval was technically successful in 83 %. Successful retrieval was significantly reduced for implants left in situ for >9 weeks versus those with a shorter dwell time. New lower limb deep vein thrombosis (DVT) and/or IVC thrombosis was reported in 88 patients following filter placement, there was no significant difference of incidence between filter types. Conclusions: This registry report provides interventional radiologists and clinicians with an improved understanding of the technical aspects of IVC filter placement to help improve practice, and the potential consequences of IVC filter placement so that we are better able to advise patients. There is a significant learning curve associated with IVC filter insertion, and when a filter is placed with the intention of removal, procedures should be in place to avoid the patient being lost to follow-up.

Uberoi, Raman, E-mail: raman.Uberoi@orh.nhs.uk; Tapping, Charles Ross [Oxford University Hospitals, John Radcliffe Hospital, Department of Radiology (United Kingdom)] [Oxford University Hospitals, John Radcliffe Hospital, Department of Radiology (United Kingdom); Chalmers, Nicholas [Manchester Royal Infirmary, Department of Radiology (United Kingdom)] [Manchester Royal Infirmary, Department of Radiology (United Kingdom); Allgar, Victoria [University of York, Hull and York Medical School (United Kingdom)] [University of York, Hull and York Medical School (United Kingdom)

2013-12-15

205

Anatomical structure of the isthmus between the inferior vena cava and tricuspid annulus investigated with a three-dimensional electroanatomical mapping system  

Microsoft Academic Search

We studied the anatomical structure of the isthmus between the inferior vena cava and tricuspid annulus in humans with a three-dimensional electroanatomical mapping system (CARTO, Biosense, Haifa, Israel). Fifteen patients with atrial flutter were studied. Thirteen patients had underlying heart disease. We investigated the anatomical structure of the isthmus with cross sections made from the three-dimensional right atrial map. The

Ryoichi Kubo; Morio Shoda; Yuji Fuda; Ryo Sugiura; Hiroshi Kasanuki

2005-01-01

206

14 CFR 385.7 - Exercise of authority by superiors.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Exercise of authority by superiors. 385.7...ASSIGNMENTS General Provisions § 385.7 Exercise of authority by superiors. ...responsibility, the superior may choose to exercise the assigned power personally....

2011-01-01

207

14 CFR 385.7 - Exercise of authority by superiors.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Exercise of authority by superiors. 385.7...ASSIGNMENTS General Provisions § 385.7 Exercise of authority by superiors. ...responsibility, the superior may choose to exercise the assigned power personally....

2010-01-01

208

77 FR 48856 - Safety Zone; Superior Bay, Duluth, MN  

Federal Register 2010, 2011, 2012, 2013

...and spectators during the Superior Man Triathlon. DATES: This rule is effective from...hazards associated with the Superior Man Triathlon, which are discussed further below...26, 2012, the inaugural Superior Man Triathlon will occur along the Bay of Lake...

2012-08-15

209

Superior sinus of the pericardium: CT appearance  

SciTech Connect

On computed tomography, a mass-like density is often observed, just posterior to the ascending aorta, that occasionally has been mistaken for mediastinal lymph node enlargement. Cadaver studies confirmed this retroaortic structure to be an extension of the periocardial cavity, the superior sinus. Anatomic studies revealed the presence of a superior sinus in all of the 28 cadavers studied. Retrospective review of 116 consecutive adult chest computed tomographic examinations disclosed its presence in 49%. This normal variant has a characteristic location, shape, and attenuation value by CT that should allow recognition and prevent misinterpretation.

Aronberg, D.J.; Peterson, R.R.; Glazer, H.S.; Sagel, S.S.

1984-11-01

210

Acute pancreatitis and superior mesenteric artery syndrome.  

PubMed

Superior mesenteric artery syndrome (SMAS) has been proposed as a rare cause of proximal bowel obstruction resulting from compression of the third portion of the duodenum secondary to narrowing of the space between the aorta and superior mesenteric artery. The main risk factors associated with SMAS are significant weight loss, corrective spinal surgery and congenital or acquired anatomic abnormalities. Its association with acute pancreatitis has been reported in very few cases. We present a critical review of this topic, with the report of a patient allegedly diagnosed of SMAS and acute pancreatitis. PMID:24641461

Sihuay-Diburga, Denisse Joan; Accarino-Garaventa, Anna; Vilaseca-Montplet, Jaime; Azpiroz-Vidaur, Fernando

2013-01-01

211

Modified liver hanging maneuver during orthotopic liver transplantation with inferior vena cava preservation: results after 120 consecutive applications.  

PubMed

The outflow venovenous anastomosis represent a crucial aspect during orthotopic liver transplantation (OLT) with inferior vena cava (IVC) preservation. The modified Belghiti liver hanging maneuver applied to the last phase of hepatectomy, lifting the liver, provides a better exposure of the suprahepatic region and allows easier orthogonal clamping of the three suprahepatic veins with a minimal portion of IVC occlusion. The outflow anastomosis constructed with a common cloacae of the three native suprahepatic veins is associated with a lower incidence of graft related venous outflow complications. The procedure planned in 120 consecutive OLT was achieved in 118 (99%). The outflow anastomosis was constructed on the common cloaca of the three hepatic veins in 111/120 cases (92.5%). No major complications were observed (bleeding during tunnel creation, graft outflow dysfunction, etc) except in one patient with acute Budd-Chiari, who successfully underwent retransplantation. PMID:17692641

Ettorre, G M; Vennarecci, G; Santoro, R; Boschetto, A; Miglioresi, L; Corazza, V; Mancini, P; Lorusso, R; Spoletini, D; Antonini, M; Tacconi, G; Santoro, E

2007-01-01

212

The hangman technique: a modified loop snare technique for the retrieval of inferior vena cava filters with embedded hooks.  

PubMed

The loop snare technique is a method for inferior vena cava (IVC) filter retrieval that creates a wire loop between the filter legs; this technique may fail in cases with an embedded hook. This report describes the hangman technique, a modified loop snare technique for filter retrieval that creates a wire loop between the filter neck and IVC wall for release of embedded filter hooks. The hangman technique was attempted in 11 cases complicated by tilt (mean tilt, 13.3 degrees ± 3.9) and an embedded hook (mean dwell time, 194.5 d) with a retrieval success rate of 81.8% (9 of 11 cases) and no associated complications. PMID:25541448

Al-Hakim, Ramsey; McWilliams, Justin P; Derry, William; Kee, Stephen T

2015-01-01

213

Renal pelvis squamous cell carcinoma with inferior vena cava infiltration: Case report and review of the literature  

PubMed Central

INTRODUCTION Renal squamous cell carcinoma (RSCC) is a rare tumor that is usually diagnosed late as a locally advanced malignancy with adjacent structure involvement. Radical surgical resection with negative margins is the mainstay of treatment, as it is correlated with improved survival, while other modalities of treatment have been shown to have limited efficacy. PRESENTATION OF CASE We report a case of a 56 year old gentleman with right RSCC with tumor encasing the inferior vena cava (IVC), treated successfully with surgical resection. DISCUSSION The surgical management of vascular involvement of similar tumors has not been discussed in-depth in the literature. Surgical resection of the IVC without reconstruction can be done successfully in the circumstance of good collateral circulation; otherwise IVC resection with reconstruction will be necessary. CONCLUSION Radical resection with clear margins of RSCC tumors with vascular involvement is feasible in selected circumstances. PMID:24973523

Lin, Zhimin; Chng, Jack Kian; Chong, Tze Tec; Soo, Khee Chee

2014-01-01

214

Validation of a computerized technique for automatically tracking and measuring the inferior vena cava in ultrasound imagery.  

PubMed

Accurate resuscitation of the critically-ill patient using intravenous fluids and blood products is a challenging, time sensitive task. Ultrasound of the inferior vena cava (IVC) is a non-invasive technique currently used to guide fluid administration, though multiple factors such as variable image quality, time, and operator skill challenge mainstream acceptance. This study represents a first attempt to develop and validate an algorithm capable of automatically tracking and measuring the IVC compared to human operators across a diverse range of image quality. Minimal tracking failures and high levels of agreement between manual and algorithm measurements were demonstrated on good quality videos. Addressing problems such as gaps in the vessel wall and intra-lumen speckle should result in improved performance in average and poor quality videos. Semi-automated measurement of the IVC for the purposes of non-invasive estimation of circulating blood volume poses challenges however is feasible. PMID:25488224

Bellows, Spencer; Smith, Jordan; Mcguire, Peter; Smith, Andrew

2014-01-01

215

CT-Guided Percutaneous Fine-Needle Aspiration Biopsy of the Inferior Vena Cava Wall: A Posterior Coaxial Approach  

SciTech Connect

A 72-year-old man was referred to our department with an incidentally diagnosed bronchogenic carcinoma of the right upper lobe. Positron emission tomography (PET) combined with computed tomography (PET-CT) revealed an unexpected hot spot in the ventral wall of the infrarenal segment of the inferior vena cava (IVC). Diagnostic biopsy of this lesion was performed under CT guidance with semiautomated 20G fine-needle aspiration (FNA) through a 19G coaxial needle. Cytology revealed few carcinoma cells, which led to the remarkable diagnosis of a distant metastasis to the IVC wall. Both the immediate postinterventional CT control and the further surveillance period of the patient were unremarkable; in particular, no signs of bleeding complications were detected. We conclude that coaxial FNA of an IVC wall lesion is technically feasible and may even help diagnose distant metastasis.

Kos, Sebastian, E-mail: skos@gmx.de; Bilecen, Deniz [University Hospital Basel, Institute of Radiology (Switzerland); Baumhoer, Daniel [University Hospital Basel, Institute of Pathology (Switzerland); Guillaume, Nicolas [University Hospital Basel, Institute of Nuclear Medicine (Switzerland); Jacob, Augustinus L. [University Hospital Basel, Institute of Radiology (Switzerland)

2010-02-15

216

Modified liver mobilization for the treatment of renal cell carcinoma with thrombosis involving the intrahepatic inferior vena cava  

PubMed Central

Background We aimed to evaluate the feasibility and clinical significance of using a modified liver-mobilization technique to treat renal cell carcinoma (RCC) combined with intrahepatic inferior vena cava (IVC) thrombosis. Methods A total of 11 level III thrombus patients underwent radical nephrectomy with resection of the tumor thrombus from intrahepatic IVC. A father clamp was used in combination with hepatic portal blocking to control the IVC. Results The intraoperative mortality and postoperative complications were reduced in 11 cases of RCC with intrahepatic IVC thrombosis. The mean blood loss was 800 mL, and mean patient hospital stay was 13 days. Follow-up was conducted for one to four months, with only two cases of recurrence recorded. Conclusions The proposed modified liver-mobilization technique could safely and effectively treat RCC and reduce intrahepatic IVC thrombosis. PMID:24774011

2014-01-01

217

Treatment of superior limbic keratoconjunctivitis by thermocauterization of the superior bulbar conjunctiva.  

PubMed

Superior limbic keratoconjunctivitis (SLK) is a chronic and recurrent inflammatory disease of the superior tarsal, bulbar and limbal conjunctiva that often responds to topical treatment with silver nitrate. As an alternative treatment in 11 patients (13 eyes), we applied thermal cautery to the inflamed superior bulbar conjunctiva following subconjunctival injection of 2% xylocaine. The overall positive response rate to thermocautery was 73% (8 patients). Of the positive responders, 63% (5 patients) had been considered silver nitrate treatment failures. Keratitis sicca was additionally noted in 55% of the patients studied. Impression cytology of involved superior bulbar conjunctiva was nearly devoid of goblet cells during the acute stage of the disorder. Following successful cauterization, goblet cells returned. Thus, thermocauterization of the superior bulbar conjunctiva appears to be a safe and effective mode of therapy for SLK. PMID:3951822

Udell, I J; Kenyon, K R; Sawa, M; Dohlman, C H

1986-02-01

218

RESONANT OSCILLATION IN DULUTH-SUPERIOR HARBOR  

EPA Science Inventory

The treatment of Duluth-Superior Harbor inlets as coupled oscillators yields Helmholtz resonance periods of 2.1-2.3 h. Analysis of water level oscillations in the harbor and currents in an inlet channel shows a 2.1-h mode, which seems to be excited by lake oscillations of nearly ...

219

Reperfusion Hemorrhage Following Superior Mesenteric Artery Stenting  

Microsoft Academic Search

Percutaneous transluminal angioplasty and stent placement is now an established treatment option for chronic mesenteric ischemia and is associated with low mortality and morbidity rates. We present a case of reperfusion hemorrhage complicating endovascular repair of superior mesenteric artery stenosis. Although a recognized complication following repair of carotid stenosis, hemorrhage has not previously been reported following mesenteric endovascular reperfusion. We

Michael Moore; Sean McSweeney; Gregory Fulton; John Buckley; Michael Maher; Michael Guiney

2008-01-01

220

Surgical capping of superior semicircular canal dehiscence.  

PubMed

Surgical plugging and resurfacing are well established treatments of superior semicircular canal dehiscence, while capping with hydroxyapatite cement has been little discussed in literature. The aim of this study was to prove the efficacy of the capping technique. Charts of patients diagnosed with superior semicircular canal dehiscence were reviewed retrospectively. All patients answered the dizziness handicap inventory, a survey analyzing the impact of their symptoms on their quality of life. Capping of the dehiscent canal was performed via the middle fossa approach in all cases. Ten out of 22 patients diagnosed with superior semicircular canal dehiscence were treated with surgical capping, nine of which were included in this study. No major perioperative complications occurred. In 8 out of 9 (89%) patients, capping led to a satisfying reduction of the main symptoms. One patient underwent revision surgery 1 year after the initial intervention. Scores in the dizziness handicap inventory were lower in the surgically treated group than in the non-surgically treated group, but results were not statistically significant (P = 0.45). Overall, capping is a safe and efficient alternative to plugging and resurfacing of superior semicircular canal dehiscence. PMID:23640386

Mueller, S A; Vibert, D; Haeusler, R; Raabe, A; Caversaccio, M

2014-06-01

221

Amnestying Superiority Violations: Processing Multiple Questions  

PubMed Central

Two experiments investigated the acceptability of multiple questions. As expected, sentences violating the Superiority Condition were accepted less often than sentences obeying it. The status of the Superiority violations was not improved by the addition of a third wh, regardless of whether the third wh was an adjunct or an argument, though it was improved by the addition of a second question (e.g., and when). Further, in a small pilot study directly comparing a sentence with adjacent final wh-phrases that may induce a stress clash (I’d like to know who hid it where when) with a sentence violating Superiority but avoiding the final adjacent wh-phrases (I’d like to know where who hid it when), half the participants indicated that the Superiority violation sentence sounded better. This suggests that the status of some additional-wh sentences may appear to improve simply because the comparison sentence with adjacent final wh-phrases is degraded. Overall, the results of the studies suggest that there is no need to complicate syntactic theory to account for the additional-wh effect, because there is no general additional-wh effect. PMID:17356682

Clifton, Charles; Fanselow, Gisbert; Frazier, Lyn

2006-01-01

222

Superior Visual Search in Adults with Autism  

ERIC Educational Resources Information Center

Recent studies have suggested that children with autism perform better than matched controls on visual search tasks and that this stems from a superior visual discrimination ability. This study assessed whether these findings generalize from children to adults with autism. Experiments 1 and 2 showed that, like children, adults with autism were…

O'Riordan, Michelle

2004-01-01

223

Ecology of Lake Superior: Preface and Prospectus  

EPA Science Inventory

This Special Issue of Aquatic Ecosystem Health and Management (AEHM) is the first of a two-volume set based on papers presented at a three-day International Conference in Duluth MN held in June 2010, and titled ?Ecology of Lake Superior: Integrated Approaches and Challenges for t...

224

Superior Semicircular Canal Dehiscence: Auditory Mechanisms  

Microsoft Academic Search

Superior semicircular canal dehiscence (SCD) syndrome aords a unique oppor- tunity to study a novel pathology in otolaryngology (rst dened in 1998) and the mechanisms by which it aects hearing. Patients with SCD syndrome present with a wide variety of symptoms: some present with vestibular symptoms (vertigo, oscillosp- sia, disequilibrium) others present with auditory symptoms (autophony, hyperacusis, low frequency conductive

Jocelyn Songer

2004-01-01

225

COSEE Superior Creates Passion for Science  

EPA Science Inventory

COSEE was a transformative educational experience that has changed the way I teach. In July, I participated in the COSEE Lake Superior Shipboard and Shoreline Science program. I spent a week on the US EPA?s R/V Lake Guardian with 14 other teachers and a crew of sailors and scient...

226

The chemical characterization of the aroma of dessert and sparkling white wines (Pedro Ximénez, Fino, Sauternes, and Cava) by gas chromatography-olfactometry and chemical quantitative analysis.  

PubMed

Wines from Pedro Ximénez (PX), Fino, botrytized Sauternes, and Cava were screened by gas chromatography-olfactometry (GC-O), and the most relevant aroma compounds were further quantified in six different wines of each group. The comparison of GC-O and quantitative data with similar data from white young wines has made it possible to identify the aroma compounds potentially responsible for the specific sensory characteristics of these wines. Results have shown that all these wines are relatively rich in 3-methylbutanal, phenylacetaldehyde, methional, sotolon, and the ethyl esters of 2-, 3-, and 4-methylpentanoic acids. While Cava has a less specific aroma profile halfway between these special wines and young white wines, PX is richest in 3-methylbutanal, furfural, beta-damascenone, ethyl cyclohexanoate, and sotolon; Fino in acetaldehyde, diacetyl, ethyl esters of branched aliphatic acids with four, five, or six carbon atoms, and 4-ethylguaiacol; and Sauternes in phenylacetaldehyde, 3-mercaptohexanol, and 4-methyl-4-mercaptopentanone. PMID:18338867

Campo, Eva; Cacho, Juan; Ferreira, Vicente

2008-04-01

227

Identification of 5-hydroxymethyl-2-furfural (5-HMF) in Cava sparkling wines by LC-DAD-MS/MS and NMR spectrometry.  

PubMed

The aim of this study was to elucidate the structure of a potential ageing marker for Cava sparkling wine. In order to clarify the structure of this compound, NMR spectroscopy and hyphenated UHPLC-DAD-MS/MS techniques were used. We identified the hitherto unknown compound as 5-hydroxymethyl-2-furfuraldehyde (5-HMF). This is the first time that this compound has been reported in sparkling wines. A survey, based on the analysis of 80 commercial sparkling wines, showed that 5-HMF is present between 0.25 and 12.81 mg/L, and is compared with those reported for other types of wine. Hypothetical origin of 5-HMF in Cava sparkling wine is discussed. PMID:23993495

Serra-Cayuela, A; Castellari, M; Bosch-Fusté, J; Riu-Aumatell, M; Buxaderas, S; López-Tamames, E

2013-12-15

228

"First-in-man" MitraClip via pulmonary vein access through a right mini-thoracotomy in a patient with agenesis of the inferior vena cava.  

PubMed

Aims: Transcatheter mitral valve repair has become a promising alternative treatment option for severe symptomatic mitral regurgitation in patients at high risk for open heart surgery with heart-lung bypass. Methods and results: We describe the first successful procedure of mitral clipping through a right lateral mini-thoracotomy via the right upper pulmonary vein in a patient with an agenesis of the inferior vena cava. The set-up of the MitraClip system on a separate table located at 70° on the right side of the patient and the fixation of the steerable sheath at the entry into the thorax with constant posterior pressure enabled clip implantation using the usual manoeuvres with marked reduction of the mitral insufficiency. Conclusions: The access through the right upper pulmonary vein using the usual right mini-thoracotomy enabled a successful mitral clipping even in the absence or occlusion of the inferior vena cava. PMID:24808417

Tiroch, Klaus; Brinkmann, Hilmar; Koudonas, Dimitrios; Vorpahl, Marc; Seyfarth, Melchior; Vetter, Herbert O

2014-05-01

229

Superior limbic keratoconjunctivitis in contact lens wearers.  

PubMed

Forty patients with daily wear, cosmetic contact lenses (CL) presented with symptoms of ocular irritation and a keratoconjunctivitis clinically resembling superior limbic keratoconjunctivitis (SLK). Typically the patients were either successful hard CL wearers who changed to soft lenses and used a chemical aseptisizing solution or preserved saline solution, or successful soft CL wearers using salt tablets who switched to a preservative-containing system. In all cases, exposure to thimerosal-preserved solutions was documented. Upon discontinuation of lens wear, all signs and symptoms slowly resolved without permanent sequelae. Positive skin and ocular sensitivity reactions to thimerosal were present in one-third (5/15) of patients tested. Light and transmission electron microscopic examination of conjunctival specimens disclosed intercellular epithelial edema, pseudoepitheliomatous hyperplasia, acute and chronic inflammation, and decreased numbers of goblet cells. Exposure to thimerosal is implicated in the etiology of contact lens-superior limbic keratoconjunctivitis (CL-SLK). PMID:6888855

Sendele, D D; Kenyon, K R; Mobilia, E F; Rosenthal, P; Steinert, R; Hanninen, L A

1983-06-01

230

Longevity of Lake Superior lake trout  

USGS Publications Warehouse

The age structure of mature lake trout Salvelinus namaycush from the Wisconsin waters of Lake Superior increased following a population recovery that has taken place since the 1960s. As the population aged, it became apparent that scales were unreliable aging structures. Beginning in 1986, we examined both scale and sagittal otolith ages from tagged fish with a known period at liberty. We found large discrepancies in scale and sagittal otolith ages of mature fish, such that scale ages were biased low. We estimated lake trout living up to 42 years, which is greater than previously reported from Lake Superior. Investigators studying lake trout population dynamics in the Great Lakes should be aware that lake trout can live longer than previously thought.

Schram, Stephen T.; Fabrizio, Mary C.

1998-01-01

231

Receptor-mediated effects of serotonin and 5-methoxytryptamine on noradrenaline release in the rat vena cava and in the heart of the pithed rat  

Microsoft Academic Search

In segments of the rat inferior vena cava preincubated with 3H-noradrenaline, it was examined whether presynaptic serotonin (5-HT) receptors exist on the postganglionic sympathetic nerves of the circulatory system; for this purpose the effects of 5-HT receptor agonists and antagonists on the electrically evoked 3H overflow were studied. Furthermore, vagotomized pithed rats (treated with atropine and captopril) were used to

M. Göthert; E. Schlicker; P. Kollecker

1986-01-01

232

Reperfusion Hemorrhage Following Superior Mesenteric Artery Stenting  

Microsoft Academic Search

Percutaneous transluminal angioplasty and stent placement is now an established treatment option for chronic mesenteric ischemia\\u000a and is associated with low mortality and morbidity rates. We present a case of reperfusion hemorrhage complicating endovascular\\u000a repair of superior mesenteric artery stenosis. Although a recognized complication following repair of carotid stenosis, hemorrhage\\u000a has not previously been reported following mesenteric endovascular reperfusion. We

Michael Moore; Sean McSweeney; Gregory Fulton; John Buckley; Michael Maher; Michael Guiney

2008-01-01

233

Birds of Isle Royale in Lake Superior  

USGS Publications Warehouse

This report constitutes an annotated list of 197 species of birds reported from Isle Royale National Park, a 210-square-mile archipelago in northwestern Lake Superior including some 200 islets and rock outcrops. The island is 45 miles long and 8 miles wide at its widest point. Bird distribution and habitats are described, along with geography and vegetation; 62 species are known to have bred at least once, 26 are thought to be breeders, and the rest are migrants.

Krefting, L.W.; Lee, F.B.; Shelton, P.C.; Gilbert, K.T.

1966-01-01

234

Lightning activity during the 1999 Superior derecho  

Microsoft Academic Search

On 4 July 1999, a severe convective windstorm, known as a derecho, caused extensive damage to forested regions along the United States\\/Canada border, west of Lake Superior. There were 665,000 acres of forest destroyed in the Boundary Waters Canoe Area Wilderness (BWCAW) in Minnesota and Quetico Provincial Park in Canada, with approximately 12.5 million trees blown down. This storm resulted

Colin G. Price; Brian P. Murphy

2002-01-01

235

Locked Superior Dislocation of the Acromioclavicular Joint  

PubMed Central

Acromioclavicular (AC) joint injuries account for approximately 3–5% of shoulder girdle injuries (Rockwood et al., 1998). Depending on severity of injury and direction of displacement these are classified using Rockwood classification system for AC joint dislocation. We present an unusual case presenting with locked superior dislocation of the AC joint highlighting the presentation and subsequent successful surgical management of such case. To our knowledge this has not been reported previously in literature. PMID:24455370

Elamin, Salma Eltoum; Webb, Mark

2013-01-01

236

Reperfusion Hemorrhage Following Superior Mesenteric Artery Stenting  

SciTech Connect

Percutaneous transluminal angioplasty and stent placement is now an established treatment option for chronic mesenteric ischemia and is associated with low mortality and morbidity rates. We present a case of reperfusion hemorrhage complicating endovascular repair of superior mesenteric artery stenosis. Although a recognized complication following repair of carotid stenosis, hemorrhage has not previously been reported following mesenteric endovascular reperfusion. We describe both spontaneous cessation of bleeding and treatment with coil embolization.

Moore, Michael; McSweeney, Sean [Cork University Hospital, Department of Radiology (Ireland); Fulton, Gregory [Cork University Hospital, Department of Vascular Surgery (Ireland); Buckley, John; Maher, Michael, E-mail: m.maher@ucc.ie; Guiney, Michael [Cork University Hospital, Department of Radiology (Ireland)

2008-07-15

237

Food of Lake Trout in Lake Superior  

Microsoft Academic Search

Stomachs were examined from 1,492 lake trout and 83 siscowets collected from Lake Superior. Data are given on the food of lake trout of legal size (17 inches or longer) by year, season, and depth of water, and on the relation between food and size among smaller lake trout.Fish contributed 96.7 to 99.9 per cent of the total volume of

William R. Dryer; Leo F. Erkkila; Clifford L. Tetzloff

1965-01-01

238

Iodine-125 Seeds Strand for Treatment of Tumor Thrombus in Inferior Vena Cava: An Experimental Study in a Rabbit Model  

SciTech Connect

Objective: The purpose of this study was to establish an animal model of implanted inferior vena cava tumor thrombus (IVCTT) and to evaluate the effect of linear iodine-125 seeds strand in treating implanted IVCTT. Methods: Tumor cell line VX{sub 2} was inoculated subcutaneously into New Zealand rabbit to develop the parent tumor. The tumor strip was inoculated into inferior vena cava (IVC) to establish the IVCTT model. The IVCTT was confirmed by multidetector computed tomography (MDCT) after 2 weeks. Twelve rabbits with IVCTT were randomly divided into two groups. Treatment group (group T; n = 6) underwent Iodine-125 seeds brachytherapy, and the control group (group C; n = 6) underwent blank seeds strand. The blood laboratory examination (including blood routine examination, hepatic and renal function), body weight, survival time, and IVCTT volume by MDCT were monitored. All rabbits were dissected postmortem, and the therapeutic effects were evaluated on the basis of histopathology. The proliferating cell nuclear antigen index (PI) and apoptosis index (AI) of IVCTT were compared between two groups. T test, Wilcoxon rank test, and Kaplan-Meier survival curve analysis were used. Results: The success rate of establishing IVCTT was 100 %. The body weight loss and cachexia of rabbits in group C appeared earlier than in group T. Body weight in the third week, the mean survival time, PI, AI in groups T and C were 2.23 {+-} 0.12 kg, 57.83 {+-} 8.68 days, (16.73 {+-} 5.18 %), (29.47 {+-} 7.18 %), and 2.03 {+-} 0.13 kg, 43.67 {+-} 5.28 days, (63.01 {+-} 2.01 %), (6.02 {+-} 2.93 %), respectively. There were statistically significant differences between group T and group C (P < 0.05). The IVCTT volume of group T was remarkably smaller than that of group C. Conclusions: Injecting and suspensory fixing VX2 tumor strip into IVC is a reliable method to establish IVCTT animal model. The linear Iodine-125 seeds strand brachytherapy was a safe and effective method for treating IVCTT in rabbit model.

Zhang, Wen, E-mail: wenzhangxiao@126.com; Yan, Zhiping, E-mail: Yan.zhiping@zs-hospital.sh.cn; Luo, Jianjun, E-mail: luo.jianjun@zs-hospital.sh.cn; Fang, Zhuting, E-mail: 470389481@qq.com; Wu, Linlin, E-mail: linlinzhifubao@126.com; Liu, QingXin, E-mail: liu.qingxin@zs-hospital.sh.cn; Qu, Xudong, E-mail: qu.xudong@zs-hospital.sh.cn; Liu, Lingxiao, E-mail: liu.lingxiao@zs-hospital.sh.cn; Wang, Jianhua, E-mail: wang.jianhua@zs-hospital.sh.cn [Fudan University, Department of Interventional Radiology, Zhongshan Hospital (China)] [Fudan University, Department of Interventional Radiology, Zhongshan Hospital (China)

2013-10-15

239

Motor Functions of the Superior Colliculus  

PubMed Central

The mammalian superior colliculus (SC) and its nonmammalian homolog, the optic tectum, constitute a major node in processing sensory information, incorporating cognitive factors, and issuing motor commands. The resulting action—to orient toward or away from a stimulus—can be accomplished as an integrated movement across oculomotor, cephalomotor, and skeletomotor effectors. The SC also participates in preserving fixation during intersaccadic intervals. This review highlights the repertoire of movements attributed to SC function and analyzes the significance of results obtained from causality-based experiments (microstimulation and inactivation). The mechanisms potentially used to decode the population activity in the SC into an appropriate movement command are also discussed. PMID:21456962

Gandhi, Neeraj J.; Katnani, Husam A.

2013-01-01

240

Conjunctival resection for superior limbic keratoconjunctivitis.  

PubMed

Ten patients with superior limbic keratoconjunctivitis were examined. Eight patients were female and 9 had bilateral disease. Five of the 10 patients had a history of thyroid disease. Two of the patients had filaments and four had a significantly decreased tear production. A conjunctival resection was carried out in all of the patients. Postoperatively, eight of these patients were either asymptomatic or much improved. Two patients with decreased tear production showed no improvement. Preoperatively, a normal Schirmer's test is helpful in predicting the success of conjunctival resection. PMID:6493706

Passons, G A; Wood, T O

1984-08-01

241

universidade superior Crise e ms notas nos  

E-print Network

- bra desde 2005. país pág. 12 #12;Desde 2005 que não havia tão poucos candidatos Ensino Superior. 1 mostram que este é o número mais baixo de can- didatos desde 2005. Em relação ao ano passado, houve menos das famílias e de uma maior dificuldade de acesso às bol- sas de ação social". Por isso, defen- de que

Instituto de Sistemas e Robotica

242

45 CFR 73.735-504 - Gifts to official superiors.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 2010-10-01 false Gifts to official superiors. 73.735-504...GENERAL ADMINISTRATION STANDARDS OF CONDUCT Gifts, Entertainment, and Favors § 73.735-504 Gifts to official superiors. An employee...

2010-10-01

243

Repeat hepatectomy with inferior vena cava re-resection for colorectal liver metastases: case report and review of the literature.  

PubMed

Liver resection in patients with inferior vena cava (IVC) involvement is becoming more common with the adoption of vascular exclusion techniques and replacement of the IVC. Repeat hepatectomy and an aggressive surgical approach can offer satisfactory disease-free survival and a cure in selected patients. We herein describe a case of repeat hepatectomy with en bloc re-do IVC resection and reconstruction with Gore-Tex graft for recurrent colorectal liver disease. The patient had previously undergone non-anatomical right liver resection with IVC partial excision and reconstruction with a porcine pericardial patch. The patient is currently disease-free at 12 months' follow-up. Surgical treatment of liver tumors involving the IVC offers the only hope for prolonged survival. Re-do liver surgery with concomitant re-excision of the IVC is feasible and can be contemplated when macroscopic removal of the tumor is expected. Management of these complex cases by a specialist team with expertise in liver transplantation and vascular techniques is advised. PMID:25466296

Marangoni, Gabriele; Hakeem, Abdul; Khan, Atif; Rotimi, Olorunda; Lodge, J Peter

2014-12-01

244

Inferior vena cava bypass for the treatment of obliterative hepatocavopathy with five-year follow-up.  

PubMed

Inferior vena cava (IVC) thrombosis at its hepatic portion (also known as obliterative hepatocavopathy [OH]), in the absence of systemic or local diseases such as vasculitis, coagulopathy, infection and malignancy, is a rare event. We report the case of a 25-year-old woman with progressive abdominal pain and leg edema after exercise. Imaging showed congestive liver and IVC occlusion at the intrahepatic portion. A liver biopsy demonstrated portal congestion without evidence of fibrosis; after unsuccessful percutaneous attempts for recanalization, consideration was given to liver transplantation with IVC reconstruction versus IVC bypass. Due to the presence of preserved liver function, an externally supported 16-mm ringed polytetrafluoroethylene graft was used to bypass from the suprarenal IVC to the suprahepatic IVC. At five years, she remains symptom-free, with normal liver function and a patent graft on systemic anticoagulation. This report highlights the successful surgical management of a patient with OH with a thick membrane. It supports other published proposals that this entity differs significantly from classic Budd-Chiari syndrome with thrombosis that affects only the hepatic veins and, thus, OH should be approached and managed differently. PMID:21917743

Anaya-Ayala, Javier E; Johnson, Brett A; Smolock, Christopher J; Davies, Mark G; Peden, Eric K

2011-10-01

245

In Vivo Evaluation of a Retrievable Vena Cava Filter-The Dibie-Musset Filter: Experimental Results  

SciTech Connect

Purpose: To evaluate, in an animal model, the efficacy and safety of a 7 Fr percutaneous vena cava filter for temporary or permanent use. Methods: The Dibie-Musset (DM) filter is a wire preformed into a double-spiral shape with a spring effect. The experiment was performed in 15 adult sheep and consisted of the insertion of 45 filters, clot trapping tests, and filter retrieval. Follow-up in all sheep consisted of radiologic (abdominal radiograph, inferior vena cavogram, abdominal computed tomography), macroscopic, and microscopic examinations between days 8 and 386 after filter placement. Results: Of the 45 filters implanted in 15 sheep, 29 were retrieved between day 0 and day 15. Filtration efficiency was 100% for clots 4 x 4 x 20 mm. No long-term (1 year) side-effects were detectable. Microscopic examination of the vein wall showed only a dense intimal fibrosis without signs of acute inflammation at 1 year. Conclusion: These results support the efficiency and safety of the DM filter in an animal model.

Dibie, Alain [Departement Cardio-Vasculaire, Institut Mutualiste Montsouris, Choisy 6, Place de Port au Prince, F-75013 Paris (France); Musset, Dominique [Service de Cardiologie, Hopital Antoine Beclere, 158, rue de la Porte de Trivaux, F-92200 Clamart (France); Heissler, Marc [Departement Cardio-Vasculaire, Institut Mutualiste Montsouris, Choisy 6, Place de Port au Prince, F-75013 Paris (France); Fournet, Jean-Christophe [Service d'Anatomie et de Cytologie Pathologiques, Hopital Necker, 159 rue de Sevres, F-75015 Paris (France); Palau, Robert; Laborde, Francois [Departement Cardio-Vasculaire, Institut Mutualiste Montsouris, Choisy 6, Place de Port au Prince, F-75013 Paris (France)

1998-03-15

246

Endovascular Treatment of Ruptured Abdominal Aneurysm into the Inferior Vena Cava in Patient After Stent Graft Placement  

SciTech Connect

We report the case of a patient who underwent endovascular repair and then reintervention as a result of the presence of a persistent endoleak complicated by an aortocaval fistula. A 76-year-old patient with a history of endovascular treatment for abdominal aortic aneurysm 2 years earlier had a palpable abdominal mass, high-output cardiac failure, and renal failure. A computed tomographic scan and angiography revealed bending of the right iliac limb, a type I endoleak, and rupture of the aneurysm into the inferior vena cava with aortocaval fistula formation. An iliac extension was positioned in the right external iliac artery. The procedure was finished successfully. Control angiography showed normal flow within the endoprosthesis, and both iliac arteries were without signs of endoleakage and aortocaval fistula. Ectatic common iliac artery may lead to a late distal attachment site endoleak. The application of a stent graft in cases of secondary aortocaval fistula after stent graft repair is a good option, particularly in emergency cases.

Juszkat, Robert, E-mail: radiologiamim@wp.p [Poznan University of Medical Sciences, Department of Radiology (Poland); Pukacki, Fryderyk [Poznan University of Medical Sciences, Department of General and Vascular Surgery (Poland); Zarzecka, Anna; Kulesza, Jerzy [Poznan University of Medical Sciences, Department of Radiology (Poland); Majewski, Waclaw [Poznan University of Medical Sciences, Department of General and Vascular Surgery (Poland)

2009-07-15

247

Topographic anatomy of the fetal inferior vena cava, coronary sinus, and pulmonary veins: Variations in Chiari's network.  

PubMed

To understand anomalies in Chiari's network better, we assessed the topographical anatomy of the fetal inferior vena cava (IVC), coronary sinus, and atria. We examined sagittal serial paraffin sections of 15 human fetuses of crown-rump length 24-36 mm, corresponding to a gestational age of 8 weeks. Although their outflow tract morphologies were similar, these 15 specimens could be classified into two groups. In eight specimens, the left common cardinal vein reached the body wall, whereas in the other seven the vein was obliterated near the left pulmonary vein. Irrespective of the group in which the specimen was included, the anteroposterior arrangement of the coronary sinus, the sinus septum (septum), and the right sinus valve (right valve) could be classified into three types: the right valve-septum-coronary sinus arrangement in seven specimens; the right valve-coronary sinus-septum arrangement in five; and the coronary sinus-right valve-septum arrangement in three. Depending on differences in topographical anatomy, the sinus septum separated the coronary sinus opening from either the right or the left atrium. Likewise, the coronary sinus opening was either adjacent to or distant from the IVC terminal. Rather than the counter-side position of the right valve being at the IVC terminal, the left sinus valve protruded leftward, forming an incomplete interatrial septum. Fetal variations seemed to be closely connected with individual variations and a high frequency of Chiari's network anomalies in adults. Clin. Anat., 2014. © 2014 Wiley Periodicals, Inc. PMID:25425533

Naito, Michiko; Yu, Hee Chul; Kim, Ji Hyun; Rodríguez-Vázquez, José Francisco; Murakami, Gen; Cho, Baik Hwan

2014-11-25

248

5-Carboxamidotryptamine: a potent agonist mediating relaxation and elevation of cyclic AMP in the isolated neonatal porcine vena cava.  

PubMed

5-Carboxamidotryptamine (5-CT) caused concentration dependent relaxation of isolated rings from the porcine vena cava contracted with either prostaglandin F2 alpha, histamine or alpha-methyl 5-hydroxytryptamine. Relaxation was not inhibited by propranolol (l microM), atropine (1 microM), indomethacin (3 microM), mepyramine (1 microM), cimetidine (1 microM), or cocaine (10 microM). Methysergide, but not cyproheptadine, was a competitive antagonist of the relaxant effect of 5-CT with a pA2 value of 7.88. 5-Carboxamidotryptamine also increased the intracellular levels of cyclic AMP, an effect which was antagonised by methysergide (apparent pA2: 7.95) but not cyproheptadine. The alpha-methyl analogue of 5-hydroxytryptamine did not cause relaxation or elevate cyclic AMP. These results suggest that 5-CT causes relaxation and elevation of cyclic AMP by interaction with a specific 5-hydroxytryptamine receptor which is '5-HT1-like'. PMID:2422518

Trevethick, M A; Feniuk, W; Humphrey, P P

1986-04-21

249

Fucodiphlorethol G Purified from Ecklonia cava Suppresses Ultraviolet B Radiation-Induced Oxidative Stress and Cellular Damage  

PubMed Central

Fucodiphlorethol G (6’-[2,4-dihydroxy-6-(2,4,6-trihydroxyphenoxy)phenoxy]biphenyl-2,2’,4,4’,6-pentol) is a compound purified from Ecklonia cava, a brown alga that is widely distributed offshore of Jeju Island. This study investigated the protective effects of fucodiphlorethol G against oxidative damage-mediated apoptosis induced by ultraviolet B (UVB) irradiation. Fucodiphlorethol G attenuated the generation of 2, 2-diphenyl-1-picrylhydrazyl radicals and intracellular reactive oxygen species in response to UVB irradiation. Fucodiphlorethol G suppressed the inhibition of human keratinocyte growth by UVB irradiation. Additionally, the wavelength of light absorbed by fucodiphlorethol G was close to the UVB spectrum. Fucodiphlorethol G reduced UVB radiation-induced 8-isoprostane generation and DNA fragmentation in human keratinocytes. Moreover, fucodiphlorethol G reduced UVB radiation-induced loss of mitochondrial membrane potential, generation of apoptotic cells, and active caspase-9 expression. Taken together, fucodiphlorethol G protected human keratinocytes against UVB radiation-induced cell damage and apoptosis by absorbing UVB radiation and scavenging reactive oxygen species. PMID:25143808

Kim, Ki Cheon; Piao, Mei Jing; Zheng, Jian; Yao, Cheng Wen; Cha, Ji Won; Kumara, Madduma Hewage Susara Ruwan; Han, Xia; Kang, Hee Kyoung; Lee, Nam Ho; Hyun, Jin Won

2014-01-01

250

Lithospheric variations across the Superior Province, Ontario, Canada: Evidence from  

E-print Network

Lithospheric variations across the Superior Province, Ontario, Canada: Evidence from tomography approximately to the province of Ontario. Shear wave splits are obtained at 24 sites across the Superior, and S. Sol (2007), Lithospheric variations across the Superior Province, Ontario, Canada: Evidence from

Rondenay, Stephane

251

Monitoring Land Cover Change in the Lake Superior Basin  

EPA Science Inventory

Lake Superior is the largest freshwater lake in the world by area and the third largest by volume. It is also the most pristine of the Great Lakes (Lake Superior Lakewide Management Plan 2006). Even still, Lake Superior is not without its threats ranging from chemical contamina...

252

Management of isolated superior mesenteric artery dissection  

PubMed Central

AIM: To evaluate our experience of the clinical management of spontaneous isolated superior mesenteric artery dissection (ISMAD). METHODS: From January 2008 to July 2013, 18 patients with ISMAD were retrospectively analyzed, including 7 patients who received conservative therapy, 9 patients who received reconstruction with bare stents, and 2 patients who underwent surgical treatment. The decision to intervene was based on anatomic suitability, patient comorbidities and symptoms. RESULTS: Intestinal ischemia-related symptoms completely resolved in 7 patients who received conservative therapy. Stent placement was successful in 9 patients. Of the 9 patients who received endovascular stenting, abdominal pain was alleviated after the procedure and gradually disappeared within 3 d. Follow-up computed tomography and computed tomography angiography were available in all patients during the first month and the first year after the procedure, which revealed patent stent and patent involved superior mesenteric artery branches with complete obliteration of the dissection lesion. In the 2 patients who underwent surgical treatment, good clinical efficacy was also observed. CONCLUSION: ISMAD may be managed successfully in a variety of ways based on the clinical symptoms. ISMAD should be treated by conservative management as the ?rst-line option, however, in those with bowel necrosis or imminent arterial rupture during conservative therapy, endovascular or surgical therapy is indicated. PMID:25493033

Lv, Peng-Hua; Zhang, Xi-Cheng; Wang, Li-Fu; Chen, Zhao-Lei; Shi, Hai-Bin

2014-01-01

253

Superior limbic keratoconjunctivitis in association with scarring of the superior tarsal conjunctiva.  

PubMed

Three patients are reported with clinical findings compatible with a diagnosis of superior limbic keratoconjunctivitis (SLK) that developed in association with scarring of the palpebral conjunctiva. Although the etiology of SLK is unknown, these patients support the theory of a mechanical cause for SLK. PMID:8713936

Raber, I M

1996-05-01

254

Superior Colliculus and Visual Spatial Attention  

PubMed Central

The superior colliculus (SC) has long been known to be part of the network of brain areas involved in spatial attention, but recent findings have dramatically refined our understanding of its functional role. The SC both implements the motor consequences of attention and plays a crucial role in the process of target selection that precedes movement. Moreover, even in the absence of overt orienting movements, SC activity is related to shifts of covert attention and is necessary for the normal control of spatial attention during perceptual judgments. The neuronal circuits that link the SC to spatial attention may include attention-related areas of the cerebral cortex, but recent results show that the SC's contribution involves mechanisms that operate independently of the established signatures of attention in visual cortex. These findings raise new issues and suggest novel possibilities for understanding the brain mechanisms that enable spatial attention. PMID:23682659

Krauzlis, Richard J.; Lovejoy, Lee P.; Zénon, Alexandre

2013-01-01

255

Superior colliculus and visual spatial attention.  

PubMed

The superior colliculus (SC) has long been known to be part of the network of brain areas involved in spatial attention, but recent findings have dramatically refined our understanding of its functional role. The SC both implements the motor consequences of attention and plays a crucial role in the process of target selection that precedes movement. Moreover, even in the absence of overt orienting movements, SC activity is related to shifts of covert attention and is necessary for the normal control of spatial attention during perceptual judgments. The neuronal circuits that link the SC to spatial attention may include attention-related areas of the cerebral cortex, but recent results show that the SC's contribution involves mechanisms that operate independently of the established signatures of attention in visual cortex. These findings raise new issues and suggest novel possibilities for understanding the brain mechanisms that enable spatial attention. PMID:23682659

Krauzlis, Richard J; Lovejoy, Lee P; Zénon, Alexandre

2013-07-01

256

Lightning Activity During the 1999 Superior Derecho  

NASA Astrophysics Data System (ADS)

On 4 July 1999, a severe convective windstorm, known as a derecho, caused extensive damage to forested regions along the United States/Canada border, west of Lake Superior. There were 665,000 acres of forest destroyed in the Boundary Waters Canoe Area Wilderness (BWCAW) in Minnesota and Quetico Provincial Park in Canada, with approximately 12.5 million trees blown down. This storm resulted in additional severe weather before and after the occurrence of the derecho, with continuous cloud-to-ground (CG) lightning occurring for more than 34 hours during its path across North America. At the time of the derecho the percentage of positive cloud-to-ground (+CG) lightning measured by the Canadian Lightning Detection Network (CLDN) was greater than 70% for more than three hours, with peak values reaching 97% positive CG lightning. Such high ratios of +CG are rare, and may be useful indicators of severe weather.

Price, C. G.; Murphy, B. P.

2002-12-01

257

Lightning activity during the 1999 Superior derecho  

NASA Astrophysics Data System (ADS)

On 4 July 1999, a severe convective windstorm, known as a derecho, caused extensive damage to forested regions along the United States/Canada border, west of Lake Superior. There were 665,000 acres of forest destroyed in the Boundary Waters Canoe Area Wilderness (BWCAW) in Minnesota and Quetico Provincial Park in Canada, with approximately 12.5 million trees blown down. This storm resulted in additional severe weather before and after the occurrence of the derecho, with continuous cloud-to-ground (CG) lightning occurring for more than 34 hours during its path across North America. At the time of the derecho the percentage of positive cloud-to-ground (+CG) lightning measured by the Canadian Lightning Detection Network (CLDN) was greater than 70% for more than three hours, with peak values reaching 97% positive CG lightning. Such high ratios of +CG are rare, and may be useful indicators of severe weather.

Price, Colin G.; Murphy, Brian P.

2002-12-01

258

Superior limbic keratoconjunctivitis: multifactorial mechanical pathogenesis.  

PubMed

Origins of superior limbic keratoconjunctivitis (SLK) are not well understood. Prompted by suggestions that pressure and friction may contribute to SLK, this paper, using evidence from the literature and from personal Kodachrome records, aims to assess, and if appropriate, enhance this understanding. The survey disclosed evidence confirming mechanical aetiology. Support is presented for the notion that SLK arises from soft tissue microtrauma: (i) between tarsal and bulbar surfaces; and (ii) between conjunctival stroma and sclera. In each pair the two apposed tissues are in repetitive motion relative to each other. It is concluded that SLK arises because nonstandard combinations of multiple predisposing and/or trigger factors exceed the physiological tolerance of mechanical stresses upon the ocular surface and tissues. Through their effects on particular tissues, eight separate stressing forces were perceived. The many contributing factors in four categories are integrated into a new aetiologic concept. PMID:10981793

Cher, I

2000-06-01

259

IVC CLAMP: infrahepatic inferior vena cava clamping during hepatectomy - a randomised controlled trial in an interdisciplinary setting  

PubMed Central

Background Intraoperative haemorrhage is a known predictor for perioperative outcome of patients undergoing hepatic resection. While anaesthesiological lowering of central venous pressure (CVP) by fluid restriction is known to reduce bleeding during transection of the hepatic parenchyma its potential side effects remain poorly investigated. In theory it may have negative effects on kidney function and tissue perfusion and bears the risk to result in severe haemodynamic instability in case of profound intraoperative blood loss. The present randomised controlled trial evaluates efficacy and safety of infrahepatic inferior vena cava (IVC) clamping as an alternative surgical technique to reduce CVP during hepatic resection. Methods/Design The proposed IVC CLAMP trial is a single-centre randomised controlled trial with a two-group parallel design. Patients and outcome-assessors are blinded for the treatment intervention. Patients undergoing elective hepatic resection due to any reason are enrolled in IVC CLAMP. All patients admitted to the Department of General-, Visceral-, and Transplant Surgery, University of Heidelberg for elective hepatic resection are consecutively screened for eligibility and written informed consent is obtained on the day before surgery. The primary objective of this trial is to assess and compare the amount of blood loss during hepatic resection in patients receiving surgical CVP reduction by clamping of the IVC as compared to anaesthesiological CVP without infrahepatic IVC clamping reduction. In addition to blood loss a set of general as well as surgical variables are analysed. Discussion This is a randomised controlled patient and observer blinded two-group parallel trial designed to assess efficacy and safety of infrahepatic IVC clamping during elective hepatectomy. Trial registration ClinicalTrials NCT00732979 PMID:19825186

Rahbari, Nuh N; Zimmermann, Johannes B; Koch, Moritz; Bruckner, Thomas; Schmidt, Thomas; Elbers, Heike; Reissfelder, Christoph; Weigand, Markus A; Büchler, Markus W; Weitz, Jürgen

2009-01-01

260

Combination of Transarterial Chemoembolization and Three-Dimensional Conformal Radiotherapy for Hepatocellular Carcinoma With Inferior Vena Cava Tumor Thrombus  

SciTech Connect

Purpose: To evaluate the effects of transarterial chemoembolization (TACE) and three-dimensional conformal radiotherapy (CRT) in patients with hepatocellular carcinoma (HCC) and inferior vena cava tumor thrombus (IVCTT). Methods and Materials: A total of 42 consecutive patients who underwent TACE and CRT (TACE+CRT group) for the treatment of HCC with IVCTT were prospectively enrolled from July 2004 to October 2006. As historical controls, 29 HCC patients with IVCTT who received TACE alone (TACE group) between July 2003 and June 2004 were included. CRT was designed to target only the IVCTT and to deliver a median total dose of 45 Gy (range, 28-50 Gy). Results: Most baseline characteristics of the two groups were similar (p > 0.05). The response and progression-free rates of IVCTT were significantly higher in the TACE+CRT group than in the TACE group (42.9% and 71.4% vs. 13.8% and 37.9%, respectively; p < 0.01 for both rates). Overall, patient survival was significantly higher in the TACE+CRT group than in the TACE group (p < 0.01), with a median survival time of 11.7 months and 4.7 months, respectively. Treatment with TACE+CRT (hazard ratio [HR] = 0.38; 95% confidence interval [CI], 0.20-0.71), progression of IVCTT (HR = 4.05; 95% CI, 2.00-8.21), Child-Pugh class B (HR = 3.44; 95% CI, 1.79-6.61), and portal vein invasion (HR = 2.31; 95% CI, 1.19-4.50) were identified as independent predictors of mortality by multivariable analysis. Conclusions: The combination of TACE and CRT is more effective in the control of IVCTT associated with HCC and improves patient survival compared with TACE alone.

Koo, Ja Eun [Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul (Korea, Republic of); Kim, Jong Hoon [Department of Radiation Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul (Korea, Republic of); Lim, Young-Suk, E-mail: limys@amc.seoul.k [Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul (Korea, Republic of)

2010-09-01

261

Complex Adaptive Systems of Systems (CASoS) engineering and foundations for global design.  

SciTech Connect

Complex Adaptive Systems of Systems, or CASoS, are vastly complex ecological, sociological, economic and/or technical systems which must be recognized and reckoned with to design a secure future for the nation and the world. Design within CASoS requires the fostering of a new discipline, CASoS Engineering, and the building of capability to support it. Towards this primary objective, we created the Phoenix Pilot as a crucible from which systemization of the new discipline could emerge. Using a wide range of applications, Phoenix has begun building both theoretical foundations and capability for: the integration of Applications to continuously build common understanding and capability; a Framework for defining problems, designing and testing solutions, and actualizing these solutions within the CASoS of interest; and an engineering Environment required for 'the doing' of CASoS Engineering. In a secondary objective, we applied CASoS Engineering principles to begin to build a foundation for design in context of Global CASoS

Brodsky, Nancy S.; Finley, Patrick D.; Beyeler, Walter Eugene; Brown, Theresa Jean; Linebarger, John Michael; Moore, Thomas W.; Glass, Robert John, Jr.; Maffitt, S. Louise; Mitchell, Michael David; Ames, Arlo Leroy

2012-01-01

262

An unusual case of chromophobe RCC: presented with an inferior vena cava thrombus and liver metastases and no discernible mass within the kidney on computerized tomography images.  

PubMed

A 57-year-old female with fatigue presented to our hospital. High-quality contrasted abdominal computerized tomography images demonstrated extensive filling defect within the left renal vein and the inferior vena cava and an enhancing hepatic mass with no obvious mass lesion in the left kidney. The patient underwent a total resection of the left kidney and venous thrombectomy by open surgery; intraoperative hepatic mass biopsy with frozen section confirmed a metastatic disease and right hepalobectomy was conducted in one surgical session. Histopathologic examination revealed a lesion of chromophobe renal cell carcinoma within the left kidney. PMID:22951006

Sheng, Jing; Wu, Zhenjie; Li, Mingmin; Huang, Jun; Lu, Jianping

2012-10-01

263

Endovascular treatment of venous graft stenosis in the inferior vena cava and the left hepatic vein after complex liver tumor resection.  

PubMed

Endovascular treatment has been reported for a variety of conditions that result in venous obstruction in the iliocaval territory. The present report describes a patient who underwent a complex resection of a tumor that infiltrated the retrohepatic segment of the inferior vena cava (IVC), necessitating replacement of the IVC with a polytetrafluoroethylene (PTFE) graft. Postoperatively, symptomatic venous obstruction occurred in the graft and the left hepatic vein. Treatment required stent placement bridging native veins and the graft. The patient underwent placement of a self-expanding stent within the IVC and the PTFE graft with treatment of the hepatic vein stenosis via jugular vein access. PMID:19097806

Brechtel, Klaus; Tepe, Gunnar; Heller, Stephan; Schmehl, Joerg; Kueper, Markus; Claussen, Claus D; Wiskirchen, Jakub

2009-02-01

264

Transjugular intrahepatic portocaval shunt placed through the strut of an inferior vena cava stent in a patient with Budd-Chiari syndrome: a technical modification.  

PubMed

Transjugular intrahepatic portocaval shunt (TIPS) is performed in patients with symptomatic Budd-Chiari syndrome (BCS) who do not have repairable hepatic veins. We report the case of a patient who had an inferior vena cava (IVC) stent placed previously as part of the management for BCS, and who subsequently required TIPS. The TIPS tract was created through the strut of the previously placed IVC stent; the TIPS stent was placed after dilatation of the liver parenchyma as well as the strut of the IVC stent. This novel technique of "strutplasty" of a previously placed stent as part of TIPS has not been reported in the literature. PMID:20139245

Surendrababu, N R S; Keshava, S N; Eapen, C E; Zachariah, U G

2010-01-01

265

Renal Sinus Fat Invasion and Tumoral Thrombosis of the Inferior Vena Cava-Renal Vein: Only Confined to Renal Cell Carcinoma  

PubMed Central

Epithelioid angiomyolipoma (E-AML), accounting for 8% of renal angiomyolipoma, is usually associated with tuberous sclerosis (TS) and demonstrates aggressive behavior. E-AML is macroscopically seen as a large infiltrative necrotic tumor with occasional extension into renal vein and/or inferior vena cava. However, without history of TS, renal sinus and venous invasion E-AML would be a challenging diagnosis, which may lead radiologists to misinterpret it as a renal cell carcinoma (RCC). In this case presentation, we aimed to report cross-sectional imaging findings of two cases diagnosed as E-AML and pathological correlation of these aforementioned masses mimicking RCC. PMID:25506021

Harman, Mustafa; Guneyli, Serkan; Sen, Sait; Elmas, Nevra

2014-01-01

266

Shouldice is superior to Bassini inguinal herniorrhaphy.  

PubMed

The original Bassini and Shouldice methods for inguinal herniorrhaphy were tested against each other and against their respective variants that avoid permanent suturing of the internal oblique muscle. Seven hundred fifty inguinal hernia repairs were prospectively allocated to 1 of 4 groups: group A: Bassini with absorbable sutures (polyglycolic acid); group B: Bassini with nonabsorbable sutures (polyester); group C: Shouldice with four rows of polypropylene sutures; and group D: Shouldice with two rows of polypropylene sutures. Outcome was correlated to prospectively defined types and risk factors such as direct hernia, repair for recurrent hernia, hernial sac diameter greater than 8 cm, age greater than 70 years, overweight, and chronic bronchitis. Actual (not actuarial) recurrence rates were determined through clinical examination by hospital staff surgeons (not through information by letter or phone) for 93.6% of surviving patients. Local complications exclusive of recurrence, but including the redoubtable and litigious sequelae of testicular atrophy and chronic ilioinguinal pain, were significantly reduced from 6.3% (group B and C) to 2.3% by omitting permanent muscle sutures (groups A and D; P < 0.05). However, the use of slowly absorbable suture material resulted in a disproportionately high recurrence rate of 12.8% in the modified Bassini group A. The original Bassini method, ie, division of the transversalis fascia and repair with nonabsorbable sutures, as was used in group B, had an actual 2-year recurrence rate of 8.7%, still a highly significant difference compared with 3.6% and 2.3% for Shouldice groups C and D, respectively (P = 0.012). For repair of recurrent hernia, the superiority of the Shouldice technique was not statistically significant: re-recurrence rate 7.6% versus 13.5% for the original Bassini group B. Repair of recurrent hernia was the only patient-related risk factor of equal significance as the method of repair. The Shouldice technique is superior to and more than merely a reinvention of Bassini's original method. The omission of muscle sutures is physiologically sound and recommended for the Shouldice operation. PMID:8024092

Kux, M; Fuchsjäger, N; Schemper, M

1994-07-01

267

Superior temporal gyrus spectral abnormalities in schizophrenia  

PubMed Central

Considerable evidence indicates early auditory stimulus processing abnormalities in schizophrenia, but the mechanisms are unclear. The present study examined oscillatory phenomena during a paired-click paradigm in the superior temporal gyrus (STG) as a possible core problem. The primary question addressed is whether first click and/or second click group differences in the time-domain evoked response in patients with schizophrenia are due to (1) group differences in the magnitude of poststimulus oscillatory activity, (2) group differences in poststimulus phase-locking, and/or (3) group differences in the magnitude of ongoing background oscillatory activity. Dense-array magnetoencephalography from 45 controls and 45 patients with schizophrenia produced left- and right-hemisphere STG 50- and 100-ms time-frequency evoked, phase-locking, and total power measures. Whereas first click 100-ms evoked theta and alpha abnormalities were observed bilaterally, evoked low beta-band differences were specific to the left hemisphere. Compared to controls, patients with schizophrenia showed more low-frequency phase variability, and the decreased 100-ms S1 evoked response observed in patients was best predicted by the STG phase-locking measure. PMID:18665866

EDGAR, J. CHRISTOPHER; HANLON, FAITH M.; HUANG, MING-XIONG; WEISEND, MICHAEL P.; THOMA, ROBERT J.; CARPENTER, BRUCE; HOECHSTETTER, KARSTEN; CAÑIVE, JOSÉ M.; MILLER, GREGORY A.

2009-01-01

268

Transmastoid Repair of Superior Semicircular Canal Dehiscence  

PubMed Central

Objective/Hypothesis?Superior semicircular canal (Sup SC) dehiscence syndrome is a rare condition, causing a variety of auditory and vestibular symptoms. The traditional surgical management is a middle cranial fossa, extradural approach to resurface the Sup SC. Recently, a transmastoid approach for plugging of the Sup SC has been developed. We present further data supporting the use of the transmastoid approach in preference to the middle fossa approach. Design?This is a retrospective multi-institutional case series. Method?We included 10 patients in this case series from two tertiary otology institutions. Sup SC dehiscence was confirmed by correlation of clinical symptoms with positive audiometric, vestibular evoked myogenic potential, and computed tomography findings. A transmastoid approach was used for plugging of the Sup SC. Either a single fenestration was created at the site of dehiscence or separate fenestrations sited ampullopetal and ampullofugal to the dehiscence. Results?All patients who underwent this procedure had good symptom control and hearing preservation postoperatively. Conclusion?In patients with adequate temporal bone pneumatization, the transmastoid approach provides a safe and effective alternative to the middle cranial fossa approach. This series has demonstrated excellent symptom control and preservation of hearing with the transmastoid approach. PMID:23904997

Zhao, Yi Chen; Somers, Thomas; van Dinther, Joost; Vanspauwen, Robby; Husseman, Jacob; Briggs, Robert

2012-01-01

269

Amorphous cobalt hydroxide with superior pseudocapacitive performance.  

PubMed

Cobalt hydroxide (Co(OH)2) has received extensive attention for its exceptional splendid electrical properties as a promising supercapacitor electrode material. Co(OH)2 study so far prefers to crystal instead of amorphous, in spite of amorphous impressive electrochemical properties including the ability to improve the electrochemical efficiency based on the disorder structure. The amorphous Co(OH)2 nanostructures with excellent electrochemical behaviors were successfully synthesized by a simple and green electrochemistry. Our as-prepared Co(OH)2 electrode exhibited ultrahigh capacitance of 1094 F g(-1) and super long cycle life of 95% retention over 8000 cycle numbers at a nominal 100 mV s(-1) scan rate. The united pseudo-capacitive performances of the amorphous Co(OH)2 nanostructures in electrochemical capacitors are totally comparable to those of the crystalline Co(OH)2 nanomaterials. These findings actually open a door to applications of amorphous nanomaterials in the field of energy storage as superior electrochemical pseudocapacitors materials. PMID:24386890

Li, H B; Yu, M H; Lu, X H; Liu, P; Liang, Y; Xiao, J; Tong, Y X; Yang, G W

2014-01-22

270

[Superior semicircular canal dehiscence as a cause of hearing loss].  

PubMed

Superior semicircular canal dehiscence can be the cause of hearing loss and vertigo. Typical findings are conductive hearing loss and hyperacusis to bone-conducted sounds. Also acute pressure- and sound-evoked vestibular symptoms may occur. We describe a middle-aged patient with a conductive hearing loss. A few basic examinations led to suspicion of superior canal dehiscence. Computerized tomographic (CT) scan revealed a pathologic third window in the superior semicircular canal. PMID:22612025

Anttinen, Juha; Saaranen, Lotta; Nikanne, Elina

2012-01-01

271

Superior mesenteric artery syndrome secondary to tuberculosis induced cachexia.  

PubMed

Superior mesenteric artery (SMA) syndrome is a rare cause of obstruction of 3rd part of duodenum between abdominal aorta and the overlying superior mesenteric artery caused by decrease in the angle between the two vessels as a result of rapid loss of retroperitoneal fat. It is seen in conditions causing severe weight loss and catabolic states. We report a case of pulmonary tuberculosis leading to superior mesenteric artery syndrome. PMID:22479754

Limaye, C S; Karande, S P; Aher, S P; Pati, K A

2011-10-01

272

Bilateral superior concha bullosa: a rare case overlooked.  

PubMed

Concha bullosa is generally defined as the pneumatization of the middle turbinate and, rarely, of the superior or the inferior turbinates. A symptomatic pneumatization of the superior turbinate is extremely rare. When symptomatic, concha bullosa may cause various problems. Concha bullosa can be easily recognized in paranasal sinus computed tomography. In this article we present a very rare case with bilateral pneumatization of the superior turbinates in a patient with relevant symptomatology. PMID:25513874

San, Turhan; Erdo?an, Bar??; Ta?el, Bülent

2014-01-01

273

Sebaceous carcinoma of the eyelid masquerading as superior limbic keratoconjunctivitis.  

PubMed

A 49-year-old woman had been treated for 18 months for superior limbic keratoconjunctivitis of the right eye. Pathologic examination of a biopsy specimen of the superior perilimbal conjunctiva disclosed intraepithelial carcinoma of sebaceous gland origin. Because of the extensive involvement of the conjunctival epithelium by tumor, a subtotal orbital exenteration was performed. To our knowledge, this is the first report of sebaceous carcinoma masquerading as superior limbic keratoconjunctivitis. PMID:4051856

Condon, G P; Brownstein, S; Codère, F

1985-10-01

274

Superior Mesenteric Artery Syndrome: An Infrequent Complication of Scoliosis Surgery  

PubMed Central

Superior mesenteric artery syndrome is a rare condition that causes a proximal small intestinal obstruction due to contraction of the angle between the superior mesenteric artery and the aorta. Scoliosis surgery is one of the 15 reasons for superior mesenteric artery syndrome, which can present with acute or chronic manifestations. Although conservative treatment is usually possible, surgical treatment is required in certain cases that cannot be treated using conservative methods. In this paper, we describe a patient who developed superior mesenteric artery syndrome after scoliosis surgery and was treated with duodenojejunostomy due to failure and complications of conservative treatment. PMID:25405053

Akgül, Turgut; Bayraktar, Adem; Dikici, Fatih; Bal?k, Emre

2014-01-01

275

Superior mesenteric artery syndrome: an infrequent complication of scoliosis surgery.  

PubMed

Superior mesenteric artery syndrome is a rare condition that causes a proximal small intestinal obstruction due to contraction of the angle between the superior mesenteric artery and the aorta. Scoliosis surgery is one of the 15 reasons for superior mesenteric artery syndrome, which can present with acute or chronic manifestations. Although conservative treatment is usually possible, surgical treatment is required in certain cases that cannot be treated using conservative methods. In this paper, we describe a patient who developed superior mesenteric artery syndrome after scoliosis surgery and was treated with duodenojejunostomy due to failure and complications of conservative treatment. PMID:25405053

Keskin, Metin; Akgül, Turgut; Bayraktar, Adem; Dikici, Fatih; Bal?k, Emre

2014-01-01

276

[Successful treatment of massive thrombosis of the vena cava inferior with nephrotic syndrome and chronic bilateral pulmonary artery thromboembolism in a patient with genetic thrombophilia].  

PubMed

A case is reported of a 23-year-old male patient who developed, after severe blunt injury of the lumbar region, massive thrombosis of the vena cava inferior (VCI), both renal veins, bilateral pulmonary artery thromboembolism (PATE), nephrotic syndrome (NS). In spite of anticoagulant therapy, the condition of the patient progressively aggravated for 1.5 year: thrombosis involved the ileac and femoral arteries on the right, thrombus floated in the right atrium with PATE recurrent episodes, pulmonary hypertension reached 120 mm Hg with formation of decompensated cor pulmnonale, proteinuria and hypoalbuminemia deteriorated, anasarca edema developed Multigenic thrombophilia was diagnosed (1 homozygous and 5 heterozygous mutations). A radical one-stage operation was successful: thromboectomy from the VCI, right ileac and left renal veins, thrombendarterectomy from the pulmonary arteries, suture of the interatrial septum defect, installation of cava-filter After the operation pulmonary pressure lowered to 40-45 mm Hg, right heart volume normalized, immunosuppressive therapy with prednisolone and cyclosporine led to nephropathy remission. The discussion covers mechanisms and factors (including genetic) of thrombosis progression, correlations between intravascular thrombosis, NS and chronic glomerulonephritis (possible NS development due to bilateral thrombosis of the renal veins and nephropathy role in thrombosis progression), approaches to conservative and surgical treatment of such patients. Global experience in conduction of pulmonary thrombendarterectomy and thrombectomy from VCI is reviewed (one-stage operations were not described earlier). PMID:22616531

Blagova, O V; Dzemeshkevich, S L; Kozlovskaia, N L; Nedostup, A V; Sarkisova, N D; Frolova, Iu V; Raskin, V V; Dzemeshkevich, A S; Abugov, S A; Skipenko, O G; Shilov, E M; Sedov, V P; Gagarina, N V; Sinitsyn, V E; Mershina, E A; Volkova, E Iu

2012-01-01

277

FORAGE FISH AND ZOOPLANKTON COMMUNITY COMPOSITION IN WESTERN LAKE SUPERIOR  

EPA Science Inventory

We assessed the abundance, size, and species composition of the fish and zooplankton communities of western Lake Superior during 1996 and 1997. Data were analyzed for 3 ecoregions (Duluth-Superior (1), Apostle Islands (2), Minnesota coast (3) differing in lake bathymetry, phsiodo...

278

Water Quality of Streams Tributary to Lakes Superior and Michigan  

E-print Network

559 Water Quality of Streams Tributary to Lakes Superior and Michigan Marine Biological Laboratory and Michigan By JEROME W. ZIMMERMAN United States Fish and Wildlife Service Special Scientific Report Superior and Michigan 16 Causes of changes in water quality 35 Literature cited 35 Appendix. Streams

279

Bioavailable iron in oligotrophic Lake Superior assessed using  

E-print Network

Bioavailable iron in oligotrophic Lake Superior assessed using biological reporters R. M. L. MCKAY1 September 26, 2005 Communicating editor: K.J. Flynn Iron bioavailability in Lake Superior was assessed during field surveys conducted in 2001­2002. Dissolved iron (Fed) ranged between 1 and 4 nM at offshore

Sterner, Robert W.

280

The Pygmy Whitefish, Coregonus Coulteri, in Lake Superior  

Microsoft Academic Search

Bottom trawling by the U. S. Fish and Wildlife Service motor vessel Cisco in Lake Superior in 1952–1953 revealed a large population of a tiny whitefish, Coregonus (Prosopium) coulteri, which has been reported previously only from northwestern North America. The hiatus in range, from Lake Superior to the Columbia River basin, is the greatest known for a North American freshwater

Paul H. Eschmeyer; Reeve M. Bailey

1955-01-01

281

Impairments in Tactile Search Following Superior Parietal Damage  

ERIC Educational Resources Information Center

The superior parietal cortex is critical for the control of visually guided actions. Research suggests that visual stimuli relevant to actions are preferentially processed when they are in peripersonal space. One recent study demonstrated that visually guided movements towards the body were more impaired in a patient with damage to superior…

Skakoon-Sparling, Shayna P.; Vasquez, Brandon P.; Hano, Kate; Danckert, James

2011-01-01

282

49 CFR 236.816 - Superiority of trains.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Superiority of trains. 236.816 Section 236.816 Transportation...MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES...Definitions § 236.816 Superiority of trains. The precedence conferred upon...

2011-10-01

283

49 CFR 236.816 - Superiority of trains.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Superiority of trains. 236.816 Section 236.816 Transportation...MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES...Definitions § 236.816 Superiority of trains. The precedence conferred upon...

2012-10-01

284

49 CFR 236.816 - Superiority of trains.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Superiority of trains. 236.816 Section 236.816 Transportation...MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES...Definitions § 236.816 Superiority of trains. The precedence conferred upon...

2013-10-01

285

49 CFR 236.816 - Superiority of trains.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Superiority of trains. 236.816 Section 236.816 Transportation...MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES...Definitions § 236.816 Superiority of trains. The precedence conferred upon...

2010-10-01

286

NOAA Technical Memorandum ERL GLERL-29 EVAPORATION FROM LARE SUPERIOR  

E-print Network

Environmental Research Laboratory Ann Arbor, Michigan July 1980 UNITED STATES NATIONAL OCEANIC AND Environmental. INTRODUCTION WATER BUDGET METHOD 2.1 Overwater Precipitation 2.2 Runoff 2.3 Outflow 2.4 Change in Storage 2 evaporation by water budget method, 1942-75. Lake Superior lake/land wind ratios. Lake Superior land - lake

287

Diencephalic connections of the superior colliculus in the hedgehog tenrec  

Microsoft Academic Search

Using different tracer substances the pathways connecting the superior colliculus with the diencephalon were studied in the Madagascan hedgehog tenrec (Echinops telfairi), a nocturnal insectivore with tiny eyes, a small and little differentiated superior colliculus and a visual cortex with no obvious fourth granular layer. The most prominent tecto-thalamic projection terminated in the ipsilateral dorsal lateral geniculate nucleus. The entire

Heinz Kiinzle

1996-01-01

288

Displacement of the Medial Rectus Pulley in Superior Oblique Palsy  

Microsoft Academic Search

PURPOSE. The rectus extraocular muscles pass through fibromuscular connective tissue pulleys that stabilize mus- cle paths and control the direction of muscle pull. The authors investigated whether abnormal forces associated with superior oblique palsy can cause displacement of pulleys and muscle paths. METHODS. Coronal magnetic resonance imaging (MRI) showing significantly reduced superior oblique cross-sec- tional areas and lack of contractile

Robert A. Clark; Joel M. Miller; Joseph L Demer

289

The Superior Transvelar Approach to the Fourth Ventricle and Brainstem  

PubMed Central

Objective?The superior transvelar approach is used to access pathologies located in the fourth ventricle and brainstem. The surgical path is below the venous structures, through the superior medullary velum. Following splitting the tentorial edge, near the tentorial apex, the superior medullary velum is split in the cerebello-mesencephalic fissure. Using the supracerebellar infratentorial, transtentorial or parietal interhemispheric routes, the superior medullary velum is approached. Splitting this velum provides a detailed view of the fourth ventricle and its floor. Materials and Methods?A total of 10 formalin-fixed specimens were dissected in a stepwise manner to simulate the superior transvelar approach to the fourth ventricle. The exposure gained the distance from the craniotomy site and the ease of access was assessed for each of the routes. We also present an illustrative case, operated by the senior author (AN). Results?The superior transvelar approach provides access to the entire length of the fourth ventricle floor, from the aqueduct to the obex, when using the parietal interhemispheric route. In addition, this approach provides access to the entire width of the floor of the fourth ventricle; however, this requires retracting the superior cerebellar peduncle. Using the supracerebellar infratentorial route gives a limited exposure of the superior part of the fourth ventricle. The occipital interhemispheric route is a compromise between these two. Conclusion?The superior transvelar approach to the fourth ventricle provides a route for approaching the fourth ventricle from above. This approach does not require opening the posterior fossa in the traditional way, and provides a reasonable alternative for accessing the superior fourth ventricle. PMID:23730546

Ezer, Haim; Banerjee, Anirban Deep; Bollam, Papireddy; Guthikonda, Bharat; Nanda, Anil

2012-01-01

290

Neuromodulation of Whisking Related Neural Activity in Superior Colliculus  

PubMed Central

The superior colliculus is part of a broader neural network that can decode whisker movements in air and on objects, which is a strategy used by behaving rats to sense the environment. The intermediate layers of the superior colliculus receive whisker-related excitatory afferents from the trigeminal complex and barrel cortex, inhibitory afferents from extrinsic and intrinsic sources, and neuromodulatory afferents from cholinergic and monoaminergic nuclei. However, it is not well known how these inputs regulate whisker-related activity in the superior colliculus. We found that barrel cortex afferents drive the superior colliculus during the middle portion of the rising phase of the whisker movement protraction elicited by artificial (fictive) whisking in anesthetized rats. In addition, both spontaneous and whisker-related neural activities in the superior colliculus are under strong inhibitory and neuromodulator control. Cholinergic stimulation activates the superior colliculus by increasing spontaneous firing and, in some cells, whisker-evoked responses. Monoaminergic stimulation has the opposite effects. The actions of neuromodulator and inhibitory afferents may be the basis of the different firing rates and sensory responsiveness observed in the superior colliculus of behaving animals during distinct behavioral states. PMID:24872572

Bezdudnaya, Tatiana

2014-01-01

291

Superior limbic keratoconjunctivitis associated with soft contact lens wear.  

PubMed

Four cosmetic soft contact lens wearers experienced lens intolerance and mild irritative symptoms. All four displayed changes suggestive of those seen in superior limbic keratoconjunctivitis with papillary hypertrophy and inflammation of the upper tarsus, superior tarsal and bulbar conjunctival fluorescein staining, superior limbal hypertrophy, and upper corneal punctate staining. Three of the four conditions resolved with discontinuance of lens wear alone; the fourth improved, but there was persistence of mild upper bulbar conjunctival and corneal staining for two years. No common causative contact lens-related factors were obvious in the four. Three of the patients were subsequently able to resume lens wear on a modified basis. PMID:6830490

Stenson, S

1983-03-01

292

Superior limbic keratoconjunctivitis associated with cosmetic soft contact lens wear.  

PubMed

Thirteen patients who wore soft contact lenses were seen with a syndrome consistent with superior limbic keratoconjunctivitis. An irregular epithelial surface, punctate staining with fluorescein, and subepithelial infiltrates were found on the superior aspect of the corneas in association with hyperemia of the superior bulbar conjunctivae. The keratoconjunctivitis persisted as long as 15 months after discontinuation of lens wear. Patch testing with ophthalmic vehicle preservatives, performed on seven patients, failed to show a consistent hypersensitivity to any of the tested compounds, and three patients had used only preservative-free saline for lens care. The etiology of this syndrome is unknown. PMID:6882249

Fuerst, D J; Sugar, J; Worobec, S

1983-08-01

293

Effect of Baechu Kimchi Added Ecklonia cava Extracts on High Glucose-induced Oxidative Stress in Human Umbilical Vein Endothelial Cells  

PubMed Central

Endothelial cell dysfunction is considered to be a major cause of vascular complications in diabetes. In the present study, we investigated the protective effect of a baechu kimchi added Ecklonia cava extract (BKE) against high glucose induced oxidative damage in human umbilical vein endothelial cells (HUVECs). Treatment with a high concentration of glucose (30 mM) induced cytotoxicity, whereas treatment with BKE protected HUVECs from high glucose induced damage; by restoring cell viability. In addition, BKE reduced lipid peroxidation, intracellular reactive oxygen species and nitric oxide levels in a dose dependent manner. Treatment with high glucose concentrations also induced the overexpression of inducible nitric oxide synthase, cyclooxygenase-2 and NF-?B proteins in HUVECs, but BKE treatment significantly reduced the overexpression of these proteins. These findings indicate that BKE may be a valuable treatment against high glucose-induced oxidative stress HUVECs. PMID:25320714

Lee, Hyun-Ah; Song, Yeong-Ok; Jang, Mi-Soon; Han, Ji-Sook

2014-01-01

294

Catheter-Directed Thrombolysis of Acute Deep Vein Thrombosis in the Lower Extremity of a Child with Interrupted Inferior Vena Cava  

SciTech Connect

We present the case of a 14-year-old girl who developed acute deep vein thrombosis (DVT) in her right lower extremity. Laboratory testing revealed protein S deficiency, and the patient's father also had this abnormality with a history of lower extremity DVT. Manual thromboaspiration followed by catheter-directed thrombolysis resulted in total clearance of all thrombi. Computed tomography and later venography revealed an interrupted inferior vena cava. Catheter-directed thrombolysis is an established treatment for adults with acute DVT. To the best of our knowledge, this report is the first to describe catheter-directed thrombolysis in a pediatric patient with lower extremity DVT. Our results suggest that catheter-directed thrombolysis is safe and effective for use in selected older children and adolescents with acute DVT in the lower extremity.

Oguzkurt, Levent, E-mail: loguzkurt@yahoo.com; Ozkan, Ugur; Tercan, Fahri; Koc, Zafer [Baskent University, Adana Teaching and Medical Research Center, Department of Radiology (Turkey)

2007-04-15

295

Acute Budd-Chiari syndrome with hepatic failure and obstruction of the inferior vena cava as presenting manifestations of hereditary protein C deficiency.  

PubMed Central

The protein C system is essential in limiting the activation of coagulation in vivo. We report on a 29 year old woman with Budd-Chiari syndrome and occlusion of the inferior vena cava who presented with acute liver failure. She was successfully treated with an emergency mesoatrial shunt. Eight months after surgery, she has no ascites and normal liver function. She had a low concentration of plasma protein C on admission to hospital and during the follow up. Protein C deficiency subsequently was found in her father and two sisters, who were asymptomatic. Hereditary protein C deficiency should be considered in patients with Budd-Chiari syndrome. Images Figure 1 Figure 2 PMID:2387522

Bourlière, M; Le Treut, Y P; Arnoux, D; Castellani, P; Bordigoni, L; Maillot, A; Antoni, M; Botta, D; Pol, B; Gauthier, A P

1990-01-01

296

Pharmacomechanical thrombectomy and catheter-directed thrombolysis of acute lower extremity deep venous thrombosis in a 9-year-old boy with inferior vena cava atresia.  

PubMed

Lower extremity deep venous thrombosis (DVT) is uncommon in the pediatric population, but it can be associated with severe symptoms and potential long-term morbidity secondary to post-thrombotic syndrome. Inferior vena cava (IVC) atresia can predispose a patient to the development of extremity DVT. There is no clear consensus on optimal management of extensive extremity DVT in pediatric patients, especially in patients with IVC anomalies. We report a case of iliofemoral DVT in a 9-year-old boy with IVC atresia and presumed protein S deficiency that was treated successfully using pharmacomechanical thrombectomy and catheter-directed thrombolysis. He was maintained on long-term anticoagulation and remained symptom free at 6 months' follow-up. PMID:25480759

Jahromi, Alireza Hamidian; Coulter, Amy H; Bass, Patrick; Zhang, Wayne W; Tan, Tze-Woei

2014-12-01

297

Ultrasonography measurement of inferior vena cava diameter of blood donors as predictors for early blood loss in tertiary hospital northeastern, malaysia.  

PubMed

According to the class of hypovolaemic shock, a blood loss less than 750 ml is not associated with the physiological changes. As a result it may cause a delay in fluid resuscitation. We postulate inferior vena cava (IVC) diameter reduction in inspiration and expiration may resemble the significant volume of blood loss in a healthy adult. We conducted a study to examine the changes of the IVC diameter pre and post blood donation.The inferior vena cava diameter during inspiration (IVCi) and expiration (IVCe) were measured using ultrasound (GE HEALTH) in supine position before and after blood donation of 450 ml. Paired t-test and Wilcoxin rank test were used to analyse the data. Forty two blood donors enrolled during the study period. The mean age of blood donors was 32.3 +/- 8.9 and mainly male blood donors. The mean IVCe of pre and post blood donation was 18.5 +/- 6.2 mm (95%CI 18.23, 18.74) and 16.6 +/- 6.6 mm (95%CI 16.35, 16.76) respectively. Meanwhile, the mean IVCi of pre and post blood donation was 17.1 +/- 8.6 mm (95%CI 16.89,17.30) and 15.6 +/- 6.6 mm (95%CI 15.43,15.81) respectively. The mean difference of IVCe pre and post blood donation was 1.9 +/- 0.5 mm (95%CI 1.75, 2.13) (p<0.001). In contrast, the mean difference of IVCi pre and post blood donation was 1.5 +/- 0.5 mm (95%CI 1.34, 1.68) (p<0.001). As a conclusion, the measurement of IVC diameter by ultrasound can predict the volume of blood loss in simulated type 1 hypovolaemia patient. PMID:24632914

Shaik Farid, A W; Mohd Hashairi, F; Nik Hisamuddin, N A R; Chew, K S; Rashidi, A

2013-12-01

298

Results from the Texas Pilot Project on Superior Energy Performance  

E-print Network

This presentation will address the outcomes to date from the Texas Pilot Project on Superior Energy Performance. Five plants in Texas are participating in this national pilot project, which began July 2008....

Ferland, K.

299

1975 1980 1985 1990 1995 2000 Lake Superior  

E-print Network

Regeneration Forest Blowdown Upland Brush Developed Domestic Grass Upland Grass Sphagnum Bog Lowland Brush Miles 10 Lake Superior Projection: Universal Transverse Mercator, Zone 15 Central Meridian: 93° W

300

Fish community change in Lake Superior, 1970–2000  

Microsoft Academic Search

Abstract: Changes,in Lake Superior’s fish community,are reviewed,from 1970 to 2000. Lake trout (Salvelinus namaycush) and lake whitefish (Coregonus,clupeaformis) stocks have increased substantially and may,be approaching ancestral states. Lake herring (Coregonus artedi) have also recovered, but under sporadic recruitment. Contaminant levels have declined and are in equilibrium with inputs, but toxaphene levels are higher than in all other Great Lakes. Sea

Charles R. Bronte; Mark P. Ebener; Donald R. Schreiner; David S. DeVault; Michael M. Petzold; Douglas A. Jensen; Carl Richards; Steven J. Lozano

2003-01-01

301

2. View of pier #3, West approach, Detroit Superior High ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. View of pier #3, West approach, Detroit Superior High Level bridge (1914-1917). Pier #3 and #4 support the steel rive span. They are 116 feet by 80 feet at the base and rest on stiff blue clay 45 feet below the surface of the river. Cast-steel bolsters of the three-hinge steel arch are anchored by structural steel grillage to the masory piers. - Detroit Superior High Level Bridge, Cleveland, Cuyahoga County, OH

302

Anisotropic organization of the rat superior paraolivary nucleus  

Microsoft Academic Search

In rodents, the superior paraolivary nucleus (SPON) is one of the major nuclei of the superior olivary complex that innervate\\u000a the inferior colliculus. To analyze the intrinsic organization of the SPON and to gain further insight into its relationship\\u000a with the inferior colliculus, the neuroanatomical tracers biotinylated dextran and horseradish peroxidase were unilaterally\\u000a injected into different regions of the central

Enrique Saldaña; Albert S. Berrebi

2000-01-01

303

Unusual morphology of the superior belly of omohyoid muscle  

PubMed Central

Though anomalies of the superior belly of the omohyoid have been described in medical literature, absence of superior belly of omohyoid is rarely reported. Herein, we report a rare case of unilateral absence of muscular part of superior belly of omohyoid. During laboratory dissections for medical undergraduate students, unusual morphology of the superior belly of the omohyoid muscle has been observed in formalin embalmed male cadaver of South Indian origin. The muscular part of the superior belly of the omohyoid was completely absent. The inferior belly originated normally from the upper border of scapula, and continued with a fibrous tendon which ran vertically lateral to sternohyoid muscle and finally attached to the lower border of the body of hyoid bone. The fibrous tendon was about 1 mm thick and received a nerve supply form the superior root of the ansa cervicalis. As omohyoid mucle is used to achieve the reconstruction of the laryngeal muscles and bowed vocal folds, the knowledge of the possible anomalies of the omohyoid muscle is important during neck surgeries. PMID:25548726

Thangarajan, Rajesh; Shetty, Prakashchandra; D'souza, Melanie Rose

2014-01-01

304

Unusual morphology of the superior belly of omohyoid muscle.  

PubMed

Though anomalies of the superior belly of the omohyoid have been described in medical literature, absence of superior belly of omohyoid is rarely reported. Herein, we report a rare case of unilateral absence of muscular part of superior belly of omohyoid. During laboratory dissections for medical undergraduate students, unusual morphology of the superior belly of the omohyoid muscle has been observed in formalin embalmed male cadaver of South Indian origin. The muscular part of the superior belly of the omohyoid was completely absent. The inferior belly originated normally from the upper border of scapula, and continued with a fibrous tendon which ran vertically lateral to sternohyoid muscle and finally attached to the lower border of the body of hyoid bone. The fibrous tendon was about 1 mm thick and received a nerve supply form the superior root of the ansa cervicalis. As omohyoid mucle is used to achieve the reconstruction of the laryngeal muscles and bowed vocal folds, the knowledge of the possible anomalies of the omohyoid muscle is important during neck surgeries. PMID:25548726

Thangarajan, Rajesh; Shetty, Prakashchandra; Sirasanagnadla, Srinivasa Rao; D'souza, Melanie Rose

2014-12-01

305

Complex Adaptive Systems of Systems (CASOS) engineering environment.  

SciTech Connect

Complex Adaptive Systems of Systems, or CASoS, are vastly complex physical-socio-technical systems which we must understand to design a secure future for the nation. The Phoenix initiative implements CASoS Engineering principles combining the bottom up Complex Systems and Complex Adaptive Systems view with the top down Systems Engineering and System-of-Systems view. CASoS Engineering theory and practice must be conducted together to develop a discipline that is grounded in reality, extends our understanding of how CASoS behave and allows us to better control the outcomes. The pull of applications (real world problems) is critical to this effort, as is the articulation of a CASoS Engineering Framework that grounds an engineering approach in the theory of complex adaptive systems of systems. Successful application of the CASoS Engineering Framework requires modeling, simulation and analysis (MS and A) capabilities and the cultivation of a CASoS Engineering Community of Practice through knowledge sharing and facilitation. The CASoS Engineering Environment, itself a complex adaptive system of systems, constitutes the two platforms that provide these capabilities.

Detry, Richard Joseph; Linebarger, John Michael; Finley, Patrick D.; Maffitt, S. Louise; Glass, Robert John, Jr.; Beyeler, Walter Eugene; Ames, Arlo Leroy

2012-02-01

306

75 FR 67950 - Notice of Designation of the Lake Superior National Estuarine Research Reserve in Wisconsin  

Federal Register 2010, 2011, 2012, 2013

...Designation of the Lake Superior National...and Coastal Resource Management, National Ocean...Wisconsin as the Lake Superior National...designation for the Lake Superior National...Coastal Zone Management Act of 1972...and Coastal Resource Management...

2010-11-04

307

Status of the shortjaw cisco (Coregonus zenithicus) in Lake Superior  

USGS Publications Warehouse

The shortjaw cisco (Coregonus zenithicus) was historically found in Lakes Huron, Michigan, and Superior, but has been extirpated in Lakes Huron and Michigan apparently as the result of commercial overharvest. During 1999-2001, we conducted an assessment of shortjaw cisco abundance in five areas, spanning the U.S. waters of Lake Superior, and compared our results with the abundance measured at those areas in 1921-1922. The shortjaw cisco was found at four of the five areas sampled, but abundances were so low that they were not significantly different from zero. In the four areas where shortjaw ciscoes were found, abundance declined significantly by 99% from the 1920s to the present. To increase populations of this once economically and ecologically important species in Lake Superior, an interagency rehabilitation effort is needed. Population monitoring is recommended to assess population trends and to evaluate success of rehabilitation efforts.

Hoff, Michael H.; Todd, Thomas N.

2004-01-01

308

Conjunctival resection treatment and ultrastructural histopathology of superior limbic keratoconjunctivitis.  

PubMed

Four patients with symptomatic superior limbic keratoconjunctivitis underwent resection of the superior bulbar conjunctiva. One of these patients also underwent a tarsal conjunctival resection in the other eye. Three of the patients had previously been treated by various regimens without resolution; the fourth had had no prior treatment. All four patients had immediate and continued relief of the ocular symptoms after the superior bulbar conjunctiva was excised. The patient who underwent tarsal conjunctival resection experienced only short-term relief. We studied the conjunctival tissue by light and transmission electron microscopy. Both techniques revealed abnormalities related to the bulbar conjunctival surface with keratinization of the epithelium, acanthosis, degeneration of the nuclei, and intracellular accumulation of glycogen. Inflammatory cells were minimally present. The tarsal conjunctiva appeared essentially normal. PMID:619676

Donshik, P C; Collin, H B; Foster, C S; Cavanagh, H D; Boruchoff, S A

1978-01-01

309

Lacrimal occlusion therapy for the treatment of superior limbic keratoconjunctivitis.  

PubMed

Superior limbic keratoconjunctivitis (SLK) is a chronic and recalcitrant disease of the superior bulbar and tarsal conjunctiva, as well as the superior limbic aspect of the cornea. Both the etiology and the pathogenesis of this condition are poorly understood. Many treatment options have been advocated in the management of SLK, including: topical antibiotics, topical anti-inflammatory agents, topical vitamin A solutions, chemical cautery, thermal cautery, and surgical resection. Most recently, studies have suggested that lacrimal occlusion therapy may be beneficial in the treatment of SLK. A case is presented in which this method of treatment was used, with excellent results. The implications of this report suggest that the use of lacrimal occlusion in the management of SLK may be a viable treatment option before considering more radical and invasive therapy. In addition, this case helps to illustrate the significant link between SLK and thyroid disease. PMID:9798210

Kabat, A G

1998-10-01

310

Postpartum Vertigo and Superior Semicircular Canal Dehiscence Syndrome  

PubMed Central

Background Superior semicircular canal dehiscence is a recently described cause of imbalance, hearing loss, and tinnitus. Symptoms may begin after abrupt changes in intracranial or middle ear pressure. Case This woman presented with a 6-year history of imbalance, hearing loss, and pulsatile tinnitus beginning when she was pushing during labor. A temporal bone computed tomography showed a dehiscence of the superior semicircular canal. Surgical repair of the dehiscenchrough the middle cranial fossa resulted in immediate resolution of the patient's symptoms, and she returned to full activity within 3 weeks. Conclusion Superior semicircular canal dehiscence is increasingly recognized as a cause of multiple otologic symptoms. Obstetricians and gynecologists with patients complaining about postpartum vertigo should inquire about symptom onset and focus their questions around events during the second stage of labor. Patients with symptoms of dehiscence should be referred to a neurotologist for management, including possible surgical repair. PMID:19622951

Jacqueline, Ogutha; Nathan C., Page; Timothy E., Hullar

2009-01-01

311

Neurocognitive Decrements are Present in Intellectually Superior Schizophrenia  

PubMed Central

Data suggest that individuals with schizophrenia (SZ) and superior intelligence can present without specific neurocognitive deficits. However, neurocognitive decrements, defined as worse cognition than expected, have been reported in practically all SZ cases. This study investigated if neurocognitive decrements are present in intellectually superior SZ by comparing the neuropsychological profile of SZ cases with IQ-matched healthy controls (HC) across intellectual levels. Participants with SZ and HCs were stratified into three IQ-groups; intellectually low (IQ 80–95; SZ n?=?65 and HC n?=?13), intellectually normal (IQ?=?100–115; SZ n?=?111 and HC n?=?115), and intellectually superior (IQ???120; SZ n?=?20 and HC n?=?50). A repeated measures multivariate analysis of co-variance compared performance on eight selected neuropsychological tests across IQ-strata and diagnostic group. Differences in clinical characteristics and social functioning in SZ across IQ-strata were investigated with multivariate and univariate analyses of variance. Intellectually superior SZ participants scored within normal limits, but had neurocognitive decrements compared to superior HCs. Decrements were of the same magnitude as in the low and normal IQ-strata. Levels of functional impairments and clinical characteristics in participants with SZ did not differ significantly across IQ-strata. Results indicate that neurocognitive decrements are present in intellectually superior SZ to the same extent as in intellectually low and intellectually normal SZ, supporting the notion that SZ is a neurocognitive disorder. Similar levels of social functional deficits and clinical symptoms suggest similar disease processes in SZ across intellectual level. PMID:24847284

Vaskinn, Anja; Ueland, Torill; Melle, Ingrid; Agartz, Ingrid; Andreassen, Ole A.; Sundet, Kjetil

2014-01-01

312

Ultrasonography of the spleen, liver, gallbladder, caudal vena cava and portal vein in healthy calves from birth to 104 days of age  

PubMed Central

Background Many of the ultrasonographic abdominal findings of adult cattle probably also apply to calves. However, significant changes associated with ruminal growth and transition from a milk to a roughage diet occur in young calves during the first few months, and it can be expected that ultrasonographic features of organs adjacent to the rumen such as spleen and liver also undergo significant changes. These have not been investigated to date and therefore the goal of this study was to describe ultrasonographic findings of the spleen, liver, gallbladder, caudal vena cava and portal vein in six healthy calves from birth to 104 days of age. Standing calves were examined ultrasonographically six times at three-week intervals starting on the first or second day of life using a 5.0-MHz transducer and techniques described previously. Results The spleen was imaged on the left at the 5th to 12th intercostal spaces. The dorsal and ventral visible limits ran from cranioventral to caudodorsal because of superimposition of the lungs. The size of the spleen was largest at the 7th and 8th intercostal spaces and the maximum thickness was measured at the 9th to 12th intercostal spaces. The liver was seen in all calves on the right and could be imaged at the 5th to 12th intercostal spaces and the area caudal to the last rib. Similar to the spleen, the dorsal visible margin of the liver ran parallel to the ventral border of the lungs. The visible size of the liver was largest at the 8th to 11th intercostal spaces and the maximum thickness was measured at the 8th and 9th intercostal spaces. The parenchymal pattern consisted of numerous fine echoes homogeneously distributed over the entire organ. The gallbladder was most commonly seen at the 9th intercostal space and was circular, oval or pear-shaped on ultrasonograms. It extended beyond the ventral border of the liver depending on the amount of bile. The caudal vena cava was triangular in cross section but sometimes had a round or oval profile and was always seen in at least one intercostal space. The maximum circumference was measured at the 10th and 11th intercostal spaces. The portal vein was circular or oval in cross section and was characterised by stellate ramifications branching into the liver parenchyma. The portal vein could always be imaged at the 7th to 11th intercostal spaces and its mean diameter at the 9th to 11th intercostal spaces ranged from 1.2 cm to 1.8 cm. Conclusions The ultrasonographic findings of the spleen, liver, gallbladder, caudal vena cava and portal vein in six healthy Holstein-Friesian calves from birth to 104 days of age serve as reference values for the examination of these anatomical structures in diseased calves. PMID:24040969

2013-01-01

313

Posttraumatic superior ophthalmic vein thrombosis in a 2 years old.  

PubMed

Superior ophthalmic vein thrombosis (SOVT) usually results from inflammatory, infectious, or malignant causes. This case describes a 2-year-old boy with severe prolapsing chemosis and proptosis due to thrombosis of the right superior ophthalmic vein resulting from midfacial and right orbital fractures 1 week after the initial trauma. Magnetic resonance imaging and internal carotid artery angiogram are essential in the diagnosis of SOVT. The literature on issues surrounding this case was reviewed with emphasis on the diagnostic evaluation, differential diagnoses, and management of posttraumatic SOVT. PMID:24488160

Akingbola, Olugbenga A; Shar, Basil; Singh, Dinesh; Frieberg, Edwin; Petrescu, Matei

2014-02-01

314

Superior mesenteric artery syndrome in a patient with cerebral palsy.  

PubMed

Superior mesenteric artery syndrome involves compression of the third part of the duodenum due to narrowing of the area between the aorta and the superior mesenteric artery (SMA). We will describe the case of a 34-year-old with cerebral palsy who presented with abdominal pain, nausea, vomiting, and weight loss and was diagnosed with SMA syndrome via CT-imaging. With failure of conservative measures, our patient underwent a duodenojejunostomy after which improvement in her weight as well as relief of her abdominal symptoms was noted. Given the rarity of this syndrome, physicians need to keep a high index of suspicion in order to prevent the damaging consequences. PMID:25053950

Neuman, Adi; Desai, Bhavita; Glass, Daniel; Diab, Wassim

2014-01-01

315

Changes in the Lake Superior Crustacean Zooplankton Community  

Microsoft Academic Search

We examined crustacean zooplankton densities at five locations in two regions of Lake Superior during a time period that spanned two decades, for three years in the early 1970's and again for three years in the early 1990's. We used coupled multivariate and univariate analyses to find whether the zooplankton community had changed over these decades, and to determine if

Jason Link; James H. Selgeby; Robert E. Keen

2004-01-01

316

[Acoustic and vestibular effects of superior semicircular canal dehiscence].  

PubMed

A dehiscence of the superior semicircular canal is associated with many middle and inner ear symptoms of varying specificity. Concerning the pathophysiology, the way in which these symptoms are connected to a postulated missing bony layer of the superior semicircular canal remains to be completely clarified. In particular, it is unclear why a bony dehiscence might induce symptoms at all; as shown by recent experimental investigations, the natural in vivo coverage of the superior semicircular canal by dura, cerebrospinal fluid and brain prevents changes in inner ear impedance. Diagnosis of superior semicircular canal dehiscence is currently based on a combination of different tests. While cranial computed tomography (with its limited visual resolution) has proven to be largely unsuitable, ocular vestibular-evoked myogenic potentials (oVEMP) are considered an important component of diagnosis. In addition to symptomatic treatment, isolated cases also present the option of highly invasive surgical intervention. Although the majority of published case reports document positive clinical outcomes for operated patients, these procedures are associated with considerable perioperative risks. PMID:23948857

Luers, J-C; Hüttenbrink, K-B

2013-09-01

317

Early detection of non-indigenous fishes in Lake Superior  

EPA Science Inventory

Invasive species pose a serious threat to the ecological stability of the Great Lakes warranting continual monitoring for the arrival of new species. Three locations in Lake Superior were identified as “high risk” for new introductions: St. Louis River near Duluth, M...

318

Early detection of invasive fishes in Lake Superior  

EPA Science Inventory

Invasive species pose a serious threat to the Great Lakes warranting continual monitoring for the arrival of new species. Three locations in Lake Superior were identified as "high risk" for new introductions: St. Louis River near Duluth, MN, Upper St. Marys River near S...

319

ZOOBENTHOS ASSEMBLAGES AS INDICATORS OF LAKE SUPERIOR COASTAL WETLAND CONDITIONS  

EPA Science Inventory

Little is known about the diversity or structure of zoobenthos assemblages in Great Lakes coastal wetlands. As part of a comparative study in western Lake Superior we wanted to investigate whether these assemblages might be useful as indicators of wetland condition. We also wante...

320

Leica ASP300 S Superior Specimen Quality, Every Time!  

E-print Network

- grams, improve specimen quality and laboratory economy. Once again the Leica ASP300 S sets a newLeica ASP300 S Superior Specimen Quality, Every Time! The New Automated Vacuum Tissue Processor #12;2 The new Leica ASP300 S, designed for routine clinical and research histopathology, is an inno- vative

Adams, Mark

321

AIRBORNE MERCURY IN PRECIPITATION IN THE LAKE SUPERIOR REGION  

EPA Science Inventory

Mercury was measured in accumulated snow (March 1982) sampled from around Lake Superior and in rainfall from Duluth, Minnesota (June-September 1982 and March-November 1983), Forbes Township, and Dorset in northwestern and central Ontario, respectively (May-September 1983). Method...

322

Morphological variation of siscowet lake trout in Lake Superior  

USGS Publications Warehouse

Historically, Lake Superior has contained many morphologically distinct forms of the lake trout Salvelinus namaycush that have occupied specific depths and locations and spawned at specific times of the year. Today, as was probably the case historically, the siscowet morphotype is the most abundant. Recent interest in harvesting siscowets to extract oil containing omega-3 fatty acids will require additional knowledge of the biology and stock structure of these lightly exploited populations. The objective of this study was to determine whether shape differences exist among siscowet populations across Lake Superior and whether these shape differences can be used to infer stock structure. Morphometric analysis (truss protocol) was used to differentiate among siscowets sampled from 23 locations in Lake Superior. We analyzed 31 distance measurements among 14 anatomical landmarks taken from digital images of fish recorded in the field. Cluster analysis of size-corrected data separated fish into three geographic groups: the Isle Royale, eastern (Michigan), and western regions (Michigan). Finer scales of stock structure were also suggested. Discriminant function analysis demonstrated that head measurements contributed to most of the observed variation. Cross-validation classification rates indicated that 67-71 % of individual fish were correctly classified to their region of capture. This is the first study to present shape differences associated with location within a lake trout morphotype in Lake Superior. ?? Copyright by the American Fisheries Society 2007.

Bronte, C.R.; Moore, S.A.

2007-01-01

323

Cationic amphiphilic non-hemolytic polyacrylates with superior antibacterial activity.  

PubMed

Acrylic copolymers with appropriate compositions of counits having cationic charge with 2-carbon and 6-carbon spacer arms can show superior antibacterial activities with concomitant very low hemolytic effect. These amphiphilic copolymers represent one of the most promising synthetic polymer antibacterial systems reported. PMID:24854366

Punia, Ashish; He, Edward; Lee, Kevin; Banerjee, Probal; Yang, Nan-Loh

2014-07-01

324

Distribution and fluxes of total and methylmercury in Lake Superior.  

PubMed

Despite the importance and size of Lake Superior, little is known regarding the biogeochemical cycling or distribution of mercury within its waters. We present the results from two research cruises on total Hg (HgT) and methylmercury (MeHg) distributions in aqueous and particulate phases, and in offshore sediments. Open waters of Lake Superior are similar in HgT content to Lakes Michigan and Ontario (sub-ng L(-1)), whereas MeHg was only 1% of HgT. Seasonality in aqueous HgT distribution was observed, most likely from tributary inputs during Spring snowmelt. Suspended particles were enriched in MeHg relative to water and surficial sediments, suggesting enhanced particle partitioning followed by demethylation in the water column and in surface sediments. Distribution coefficients for mercury in surficial sediments were lower than those in suspended material, likely due to remineralization. Preliminary estimates of mass balance indicate that air-water exchange processes such as evasion and wet deposition dominate the HgT budget, due to the basin's relatively small watershed area relative to lake area. In contrast, methylmercury cycling within Lake Superior is influenced more strongly by watershed sources, as well as by sedimentary sources and photodemethylation. The Hg cycle in Lake Superior is unique in that it is more similar in many aspects to that in marine systems than in small lakes, where management data for freshwaters typically originates. PMID:12666914

Rolfhus, K R; Sakamoto, H E; Cleckner, L B; Stoor, R W; Babiarz, C L; Back, R C; Manolopoulos, H; Hurley, J P

2003-03-01

325

SUPERIOR COLLICULUS LESIONS AND FLASH EVOKED POTENTIALS FROM RAT CORTEX  

EPA Science Inventory

It is generally assumed that the primary response of the rat flash evoked potential (FEP) is activated by a retino-geniculate pathway, and that the second response reflects input to the cortex by way of the superior colliculus (SC) or other brainstem structures. In the present st...

326

A new look at the Lake Superior biomass size spectrum  

EPA Science Inventory

We synthesized data from multiple sampling programs and years to describe the Lake Superior pelagic biomass size structure for two time periods separated by 5 years. The data consisted of water analyzed on a Coulter counter for algae, in situ measurements with a laser optical pl...

327

Ileocolic Arteriovenous Fistula with Superior Mesenteric Vein Aneurism: Endovascular Treatment  

SciTech Connect

We report a case of a venous aneurysm secondary to an acquired ileocolic arteriovenous fistula in a 64-year-old woman with recurrent abdominal pain and history of appendectomy. The aneurysm was diagnosed by ultrasound and computed tomography. Angiography showed an arteriovenous fistula between ileocolic branches of the superior mesenteric artery and vein. This vascular abnormality was successfully treated with coil embolization.

Gregorio, Miguel Angel de; Gimeno, Maria Jose; Medrano, Joaquin [Interventional Radiology, Clinico Universitario Lozano Blesa (Spain); Schoenholz, Caudio; Rodriguez, Juan; D'Agostino, Horacio [Interventional Radiology, State University Health Sciences Center (United States)

2004-09-15

328

Total variation superiorization schemes in proton computed tomography image reconstruction  

E-print Network

CT) has been suggested as a means for reducing the range40 uncertainty in proton radiation therapy11 Total variation superiorization schemes in proton computed tomography image reconstruction S. N. Penfolda Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW, Australia5 R. W

Censor, Yair

329

VERTICAL DISTRIBUTION OF PROFUNDAL BENTHOS IN LAKE SUPERIOR SEDIMENTS  

EPA Science Inventory

Layers of sediment in box cores from 10 Lake Superior open lake sites were sieved at 250 micrometers to retain benthos. The average density of benthic organisms, 3,055/sq m, was higher than has previously been reported for profundal regions of the lake, suggesting that biological...

330

Superior Thermal Conductivity of Single-Layer Graphene  

E-print Network

Superior Thermal Conductivity of Single-Layer Graphene Alexander A. Balandin,*,, Suchismita Ghosh ABSTRACT We report the measurement of the thermal conductivity of a suspended single-layer graphene. The room temperature values of the thermal conductivity in the range (4.84 ( 0.44) Ã? 103 to (5.30 ( 0

331

Treatment of superior limbic keratoconjunctivitis with topical cromolyn sodium.  

PubMed

Eight patients with superior limbic keratoconjunctivitis (SLKC) were treated with topical cromolyn sodium. All standard modes of therapy had failed. Six patients manifested marked improvement or complete resolution of their condition. The administration of cromolyn sodium appears to be a safe and effective alternative in the treatment of SLKC. PMID:3113315

Confino, J; Brown, S I

1987-04-01

332

Growth and Contaminant Dynamics of Lake Superior Lake Trout  

Microsoft Academic Search

Lean lake trout (Salvelinus namaycush) and the endemic siscowet are ecologically distinct phenotypes of char inhabiting Lake Superior. To examine growth and contaminant concentration dynamics of these fishes, and to assess their utility as indicators of environmental contamination, length, weight, estimated age, and muscle tissue lipid and organochlorine (OC) chemical concentration data were analyzed. Lean lake trout grew faster in

Michael A. Miller; Stephen T. Schram

2000-01-01

333

A thermal scanning study of coastal upwelling in Lake Superior  

NASA Technical Reports Server (NTRS)

The use of a thermal scanner to monitor the time evolution of the thermal structure of the coastal waters in Lake Superior during an upwelling event is described. Mosaics of thermal imagery from ten different times are described. Qualitative descriptions of the imagery give insight into the upwelling event. Recommendations for future use of a thermal scanner to monitor an upwelling event are discussed.

Scarpace, F. L.; Green, T., III; Madding, R. P.

1979-01-01

334

Biological Motion Task Performance Predicts Superior Temporal Sulcus Activity  

ERIC Educational Resources Information Center

Numerous studies implicate superior temporal sulcus (STS) in the perception of human movement. More recent theories hold that STS is also involved in the "understanding" of human movement. However, almost no studies to date have associated STS function with observable variability in action understanding. The present study directly associated STS…

Herrington, John D.; Nymberg, Charlotte; Schultz, Robert T.

2011-01-01

335

MESTRADO EM MICROBIOLOGIA FBRICAS CELULARES MICROBIANAS Instituto Superior Tcnico  

E-print Network

MESTRADO EM MICROBIOLOGIA FÁBRICAS CELULARES MICROBIANAS ­ Instituto Superior Técnico Objectivos: O microbiologia celular e molecular com as novas abordagens da engenharia metabólica à escala do genoma procariotas e eucariotas: - Estruturas celulares e compartimentalização; - Sistemas de transporte; - Fluxo de

Instituto de Sistemas e Robotica

336

Denitrification Rates in a Lake Superior Coastal Wetland  

EPA Science Inventory

Inputs of anthropogenic nitrogen to the Nation?s aquatic ecosystems have increased substantially over the past several decades. Nitrogen inputs to Lake Superior since about 1900 have increased at a rate of about 2% per year, doubling about every 35 years (Bennett, 1986), althoug...

337

Superior divisional vestibular paresis in anterior inferior cerebellar artery infarction  

Microsoft Academic Search

A 74-year-old woman with sudden vertigo and dysarthria showed spontaneous nystagmus beating rightward, upward and clockwise. She also exhibited dysfunction of the left utricle and superior and horizontal canals, which was documented by head impulse and heave tests, measurements of ocular torsion and subjective visual vertical tilt, bithermal caloric tests, and rotation axis analysis of the spontaneous nystagmus. In contrast,

Hyung Lee; Hyo-Jung Kim; Ja-Won Koo; Ji Soo Kim

2009-01-01

338

SAL, Dept. of ECE 1 --Diversity Means Superiority  

E-print Network

Shadow-200 UAV Platform 2.94' 0 5' 10' Rx Antenna Tx Antenna 5' 10' Example of MIMO Radar #12;SAL, DeptSAL, Dept. of ECE 1 MIMO Radar -- Diversity Means Superiority Jian Li Department of Electrical Forsythe, William Roberts, Petre Stoica, Yao Xie, Luzhou Xu, Xumin Zhu #12;SAL, Dept. of ECE 2 MIMO Radar

Zhang, Shuzhong

339

Lake Superior supports novel clusters of cyanobacterial picoplankton.  

PubMed

Very little is known about the biodiversity of freshwater autotrophic picoplankton (APP) in the Laurentian Great Lakes, a system comprising 20% of the world's lacustrine freshwater. In this study, the genetic diversity of Lake Superior APP was examined by analyzing 16S rRNA gene and cpcBA PCR amplicons from water samples. By neighbor joining, the majority of 16S rRNA gene sequences clustered within the "picocyanobacterial clade" consisting of freshwater and marine Synechococcus and Prochlorococcus. Two new groups of Synechococcus spp., the pelagic Lake Superior clusters I and II, do not group with any of the known freshwater picocyanobacterial clusters and were the most abundant species (50 to 90% of the sequences) in samples collected from offshore Lake Superior stations. Conversely, at station Portage Deep (PD), located in a nearshore urbanized area, only 4% of the sequences belonged to these clusters and the remaining clones reflected the freshwater Synechococcus diversity described previously at sites throughout the world. Supporting the 16S rRNA gene data, the cpcBA library from nearshore station PD revealed a cosmopolitan diversity, whereas the majority of the cpcBA sequences (97.6%) from pelagic station CD1 fell within a unique Lake Superior cluster. Thus far, these picocyanobacteria have not been cultured, although their phylogenetic assignment suggests that they are phycoerythrin (PE) rich, consistent with the observation that PE-rich APP dominate Lake Superior picoplankton. Lastly, flow cytometry revealed that the summertime APP can exceed 10(5) cells ml-1 and suggests that the APP shifts from a community of PE and phycocyanin-rich picocyanobacteria and picoeukaryotes in winter to a PE-rich community in summer. PMID:17468271

Ivanikova, Natalia V; Popels, Linda C; McKay, R Michael L; Bullerjahn, George S

2007-06-01

340

Lake Superior Supports Novel Clusters of Cyanobacterial Picoplankton? †  

PubMed Central

Very little is known about the biodiversity of freshwater autotrophic picoplankton (APP) in the Laurentian Great Lakes, a system comprising 20% of the world's lacustrine freshwater. In this study, the genetic diversity of Lake Superior APP was examined by analyzing 16S rRNA gene and cpcBA PCR amplicons from water samples. By neighbor joining, the majority of 16S rRNA gene sequences clustered within the “picocyanobacterial clade” consisting of freshwater and marine Synechococcus and Prochlorococcus. Two new groups of Synechococcus spp., the pelagic Lake Superior clusters I and II, do not group with any of the known freshwater picocyanobacterial clusters and were the most abundant species (50 to 90% of the sequences) in samples collected from offshore Lake Superior stations. Conversely, at station Portage Deep (PD), located in a nearshore urbanized area, only 4% of the sequences belonged to these clusters and the remaining clones reflected the freshwater Synechococcus diversity described previously at sites throughout the world. Supporting the 16S rRNA gene data, the cpcBA library from nearshore station PD revealed a cosmopolitan diversity, whereas the majority of the cpcBA sequences (97.6%) from pelagic station CD1 fell within a unique Lake Superior cluster. Thus far, these picocyanobacteria have not been cultured, although their phylogenetic assignment suggests that they are phycoerythrin (PE) rich, consistent with the observation that PE-rich APP dominate Lake Superior picoplankton. Lastly, flow cytometry revealed that the summertime APP can exceed 105 cells ml?1 and suggests that the APP shifts from a community of PE and phycocyanin-rich picocyanobacteria and picoeukaryotes in winter to a PE-rich community in summer. PMID:17468271

Ivanikova, Natalia V.; Popels, Linda C.; McKay, R. Michael L.; Bullerjahn, George S.

2007-01-01

341

Can Nephrologists Use Ultrasound to Evaluate the Inferior Vena Cava? A Cross-Sectional Study of the Agreement between a Nephrologist and a Cardiologist  

PubMed Central

Background/Aims The costs and the need for a specialist impair the implementation of ultrasonography for evaluating the inferior vena cava (IVC) to assess the volemic status in hemodialysis patients. We investigated whether a nephrologist with limited ultrasound training can accurately assess the IVC in patients undergoing hemodialysis. Methods A cardiologist and a nephrologist consecutively measured the indexed IVC expiratory diameter (VCDi) and the IVC collapsibility index (IVCCI) of 52 patients during hemodialysis sessions. In protocol I, the nephrologist used a regular ultrasound system (RUS) and the cardiologist used a cardiovascular ultrasound equipment; in protocol II, the machines were interchanged. Pearson and kappa coefficients and the interexaminer agreement by the Bland-Altman method were calculated. Results The VCDi measurements showed a strong correlation in both protocols (r = 0.88 and 0.84 in protocols I and II, respectively). The volemic classifications were excellent in protocol I (kappa = 0.82 and 0.93 by VCDi and IVCCI, respectively) and substantial in protocol II (kappa = 0.77 and 0.75 by VCDi and IVCCI, respectively). The interexaminer agreement on the VCDi measurements was very good in both protocols. Conclusions Ultrasound evaluation of the IVC can be performed by nephrologists using an RUS to assess the volemic status in hemodialysis patients. PMID:24926312

Muniz Pazeli, José; Fagundes Vidigal, Daniel; Cestari Grossi, Tarcísio; Silva Fernandes, Natália Maria; Colugnati, Fernando; Baumgratz de Paula, Rogério; Sanders-Pinheiro, Hélady

2014-01-01

342

Deep Venous Thrombosis of the Leg, Associated with Agenesis of the Infrarenal Inferior Vena Cava and Hypoplastic Left Kidney (KILT Syndrome) in a 14-Year-Old Child  

PubMed Central

Agenesis of the inferior vena cava (IVC) is a rare anomaly which can be identified as incidental finding or can be associated with iliofemoral vein thrombosis. IVC agenesis has a known association with renal anomalies which are mainly confined to the right kidney. We describe a case of a 14-year-old male who presented with left leg swelling and pain. Ultrasonography confirmed the presence of left leg deep vein thrombosis (DVT). No underlying hematologic risk factors were identified. A CT scan was obtained which demonstrated absent infrarenal IVC and extensive thrombosis in the left deep venous system and development of collateral venous flow into the azygous/hemiazygous system, with extension of thrombus into paraspinal collaterals. An additional finding in the patient was an atrophic left kidney and stenosis of an accessory left renal artery. Agenesis of the IVC should be considered in a young patient presenting with lower extremity DVT, especially in patients with no risk factors for thrombosis. As agenesis of the IVC cannot be corrected, one should be aware that there is a lifelong risk of lower extremity DVT.

Bami, Sakshi; Vazquez, Yarelis; Chorny, Valeriy; Amodio, John

2015-01-01

343

Bioaccumulation of toxaphene congeners in the lake superior food web  

USGS Publications Warehouse

The bioaccumulation and biotransformation of toxaphene was examined in the food webs of Lake Superior and Siskiwit Lake (Isle Royale) using congener specific analysis as well as stable isotope ratios of carbon and nitrogen to characterize food webs. Toxaphene concentrations (calculated using technical toxaphene) in lake trout (Salvelinus namaycush) from the western basin of Lake Superior (N = 95) averaged (±SD) 889 ± 896 ng/g wet wt and 60 ± 34 ng/g wet wt in Siskiwit Lake. Major congeners in lake trout were B8-789 (P38), B8-2226 (P44), B9-1679 (P50), and B9-1025 (P62). Toxaphene concentrations were found to vary seasonally, especially in lower food web organisms in Lake Superior and to a lesser extent in Siskiwit Lake. Toxaphene concentrations declined significantly in lake herring (Coregonus artedii), rainbow smelt (Omerus mordax), and slimy sculpin (Cottus cognatus) as well as in zooplankton (> 102 &mn;m) and Mysis (Mysis relicta) between May and October. The seasonal variation may reflect seasonal shifts in the species abundance within the zooplankton community. Trophic magnification factors (TMF) derived from regressions of toxaphene congener concentrations versus ?15N were > 1 for most octa- and nonachlorobornanes in Lake Superior except B8-1413 (P26) and B9-715. Log bioaccumulation factors (BAFs) for toxaphene congeners in lake trout (ng/g lipid/ng/L dissolved) ranged from 4.54 to 9.7 and were significantly correlated with log octanol-water partition coefficients. TMFs observed for total toxaphene and congener B9-1679 in Lake Superior were similar to those in Arctic lakes, as well as to previous studies in the Great Lakes, which suggests that the bioaccumulation behavior of toxaphene is similar in pelagic food webs of large, cold water systems. However, toxaphene concentrations were lower in lake trout from Siskiwit Lake and lakes in northwestern Ontario than in Lake Superior possibly because of shorter food chains and greater reliance on zooplankton or other pelagic invertebrates.

Muir, D.C.G.; Whittle, D.M.; De Vault, D. S.; Bronte, C.R.; Karlsson, H.; Backus, S.; Teixeira, C.

2004-01-01

344

HERNIA DE BOCHDALECK GIGANTE. PRESENTACIÓNDE UN CASO  

Microsoft Academic Search

Se presenta un caso de hernia de Bochdaleck gigante en un varón de 14 años que fue diagnosticado de forma casual. Se revisa la escasa bibliografía sobre la ausencia radiológica de hemidiafragma, comentándose además la aportación del diagnóstico por imagen, fundamentalmente la tomografia axial computarizada (TAC) y la resonancia nuclear magnética (RNM). Finalmente, se revisan las asociaciones más frecuentes de

L. M. Entrenas Costa; T. Domínguez Platas; J. M. Checa Pinilla; J. M. Antona Gómez; F. Fuentes Otero

1992-01-01

345

Tullio phenomenon in superior semicircular canal dehiscence syndrome.  

PubMed

Tullio phenomenon refers to eye movements induced by sound.(1) This unusual examination finding may be seen in superior semicircular canal dehiscence (SSCD) syndrome.(2) This disorder is due to absent bone over the superior semicircular canal (figure). Patients complain of dizziness triggered by loud sound, aural fullness, autophony, and pulsatile tinnitus. When Tullio phenomenon exists in SSCD syndrome, the patient develops a mixed vertical-torsional nystagmus in which the slow phase rotates up and away from the affected ear (video on the Neurology® Web site at Neurology.org). This pattern of nystagmus aligns in the plane of the dehiscent semicircular canal and is due to excitation of its afferent nerves. PMID:24638216

Basura, Gregory J; Cronin, Scott J; Heidenreich, Katherine D

2014-03-18

346

False memories in highly superior autobiographical memory individuals.  

PubMed

The recent identification of highly superior autobiographical memory (HSAM) raised the possibility that there may be individuals who are immune to memory distortions. We measured HSAM participants' and age- and sex-matched controls' susceptibility to false memories using several research paradigms. HSAM participants and controls were both susceptible to false recognition of nonpresented critical lure words in an associative word-list task. In a misinformation task, HSAM participants showed higher overall false memory compared with that of controls for details in a photographic slideshow. HSAM participants were equally as likely as controls to mistakenly report they had seen nonexistent footage of a plane crash. Finding false memories in a superior-memory group suggests that malleable reconstructive mechanisms may be fundamental to episodic remembering. Paradoxically, HSAM individuals may retrieve abundant and accurate autobiographical memories using fallible reconstructive processes. PMID:24248358

Patihis, Lawrence; Frenda, Steven J; LePort, Aurora K R; Petersen, Nicole; Nichols, Rebecca M; Stark, Craig E L; McGaugh, James L; Loftus, Elizabeth F

2013-12-24

347

False memories in highly superior autobiographical memory individuals  

PubMed Central

The recent identification of highly superior autobiographical memory (HSAM) raised the possibility that there may be individuals who are immune to memory distortions. We measured HSAM participants’ and age- and sex-matched controls’ susceptibility to false memories using several research paradigms. HSAM participants and controls were both susceptible to false recognition of nonpresented critical lure words in an associative word-list task. In a misinformation task, HSAM participants showed higher overall false memory compared with that of controls for details in a photographic slideshow. HSAM participants were equally as likely as controls to mistakenly report they had seen nonexistent footage of a plane crash. Finding false memories in a superior-memory group suggests that malleable reconstructive mechanisms may be fundamental to episodic remembering. Paradoxically, HSAM individuals may retrieve abundant and accurate autobiographical memories using fallible reconstructive processes. PMID:24248358

Patihis, Lawrence; Frenda, Steven J.; LePort, Aurora K. R.; Petersen, Nicole; Nichols, Rebecca M.; Stark, Craig E. L.; McGaugh, James L.; Loftus, Elizabeth F.

2013-01-01

348

Ocular surface squamous neoplasia masquerading as superior limbic keratoconjunctivitis.  

PubMed

To report a case of ocular surface squamous neoplasia (OSSN) masquerading as superior limbic keratoconjunctivitis (SLK). A 62-year-old woman was referred with foreign body sensation, irritation, photophobia and decreased vision in the left eye. She was initially treated for 10 months with intermittent topical corticosteroids for a presumed diagnosis of SLK. She underwent excisional biopsy of the superior conjunctiva and was found, on histopathologic evaluation, to have OSSN with moderate to marked dysplasia. This is the first reported case of OSSN masquerading with signs and symptoms of SLK. Any ocular surface lesion refractory to standard medical treatment should raise suspicion for a malignant process and warrant further cytologic or histopathologic evaluation. PMID:21572741

Moshirfar, Majid; Khalifa, Yousuf M; Kuo, Annie; Davis, Don; Mamalis, Nick

2011-01-01

349

Superior limbic keratoconjunctivitis causing chronic ocular irritation in a child.  

PubMed

Superior limbic keratoconjunctivitis (SLK) is an uncommon, painful inflammation of the ocular surface localized to the superior sectors of the cornea, limbus, and conjunctiva. The clinical course tends to be chronic, with alternating periods of remission and exacerbation. Many patients experience severe ocular discomfort for long periods. Corneal involvement may induce scarring, astigmatism, and ultimately decreased vision. SLK typically occurs in woman between 20 and 60 years of age. Little is known about the features of SLK in young children because the earliest age described in the literature is adolescence. We report the clinical presentation and management of SLK in a 7-year-old boy who responded well to topical steroids and lubricants. PMID:23158547

Gupta, Amit; Morini, Chiara; Sachdeva, Virender; Kekunnaya, Ramesh

2012-12-01

350

Ocular Surface Squamous Neoplasia Masquerading as Superior Limbic Keratoconjunctivitis  

PubMed Central

To report a case of ocular surface squamous neoplasia (OSSN) masquerading as superior limbic keratoconjunctivitis (SLK). A 62-year-old woman was referred with foreign body sensation, irritation, photophobia and decreased vision in the left eye. She was initially treated for 10 months with intermittent topical corticosteroids for a presumed diagnosis of SLK. She underwent excisional biopsy of the superior conjunctiva and was found, on histopathologic evaluation, to have OSSN with moderate to marked dysplasia. This is the first reported case of OSSN masquerading with signs and symptoms of SLK. Any ocular surface lesion refractory to standard medical treatment should raise suspicion for a malignant process and warrant further cytologic or histopathologic evaluation. PMID:21572741

Moshirfar, Majid; Khalifa, Yousuf M.; Kuo, Annie; Davis, Don; Mamalis, Nick

2011-01-01

351

Achieving superior resurfacing results with the erbium:YAG laser.  

PubMed

Laser skin resurfacing has become increasingly popular. The carbon dioxide (CO2) laser seemingly remains the most commonly used laser modality for skin resurfacing. Many surgeons still promote the CO2 laser as being superior to the erbium:YAG laser, particularly for individuals with deeper lines. However, further experience with the erbium:YAG laser has shown the converse to be true. The erbium:YAG laser can be used to treat deep rhytids successfully, many times achieving results superior to those seen with the CO2 laser, particularly in the perioral region. The theory behind this relates to the 10-fold greater absorption of the erbium:YAG wavelength by water. The greater absorption produces more efficient vaporization, even at low fluences, with greatly reduced adjacent thermal injury. Ablation can be carried to deeper levels of the dermis than is consistently safe with the CO2 laser. Deliverance of total fluences in the range of 100 to 150 J/cm2, or more, produces a marked reduction or elimination of deeper rhytids. Clinically, experience with more than 300 cases indicates collagen remodeling occurs to a similar degree with the erbium:YAG laser as with the CO2 laser, as improvement in rhytids can be seen for 2 to 3 months after surgery. It would appear that superior results can be obtained without the "heat effect" of the CO2 laser. The erbium:YAG laser is capable of achieving superior resurfacing results, while offering many advantages to the patient, eg, reduced anesthetic requirements, shorter healing time, reduced erythema, less risk of pigmentary change, and more flexibility for resurfacing the skin off of the face. PMID:12437434

Jasin, Michael E

2002-01-01

352

Advanced bit establishes superior performance in Ceuta field  

SciTech Connect

A new-generation polycrystalline diamond compact (PDC) bit is redefining operational efficiency and reducing drilling costs in the Ceuta field, in the Lago de Maracaibo area of Venezuela. Its unique cutting structure and advancements in PDC cutter technology have established superior performance in this challenging application. The paper describes the new-generation PDC bit, advanced technology PDC cutters, and performance. A table gives cost per foot evaluation.

Mensa-Wilmot, G.

1999-11-01

353

Pancreaticoduodenal Artery Aneurysm Formation with Superior Mesenteric Artery Stenosis  

PubMed Central

Celiac stenosis or occlusion is attributed partly to increase blood flow at pancreatic arcade from the superior mesenteric artery (SMA) system and may play a causal role in true aneurysm of pancreaticoduodenal artery (PDAA) formation. However, despite possible increased blood flow in the pancreatic arcades like celiac stenosis, PDAAs with a stenotic SMA are extremely rare, with only three cases have been reported in the literature. We report a case of PDAA with SMA stenosis and review the literature. PMID:25298835

Kitaoka, Tadashi; Kamiya, Chiaki; Suzuki, Jun; Sato, Osamu

2014-01-01

354

Anatomy of the Midcontinent Rift beneath Lake Superior  

NASA Astrophysics Data System (ADS)

The structure and geometry of the 1.1-b.y.-old Midcontinent Rift system under Lake Superior is interpreted from 20 seismic reflection profiles recorded during the early and mid-1980s. The seismic data reveal that rift basins under Lake Superior are variable in depth and are partially filled with Keweenawan age sediments to depths of 7 km or more and volcanic flows to depths of 36 km. These rift basins form a continuous and sinuous feature that widens in the Allouez Basin and Marquette Basin in the western and central lake and narrows between White Ridge and the Porcupine Mountains. The rift basin bends southeast around the Keweenaw Peninsula, widens to about 100 km as it extends into the eastern half of Lake Superior, and exists the lake with its axis in the vicinity of Au Sable Point in Pictured Rocks National Lake Shore, about 50 km northeast of Munising, Michigan. The axis of the rift may exit the western end of the lake near Chequamegon Bay in Wisconsin. However, lack of data in that area limits interpretation at this time. Prior to late-stage reverse-faulting, a continuous basin of more uniform thickness was present beneath the lake. Crustal extension during rifting of approximately 50 km was followed by plate convergence and crustal shortening of approximately 30 km, with the major component of thrust from the southeast. Crustal shortening occurred after development of rift grabens and their filling with lava flows, but before deposition of the final sag basin sediments. Integration of information obtained from outcrops with data reported here indicates that the Lake Superior section of the rift is associated with as many as three major boundary faults.

Thompson, M. D.; McGinnis, L. D.; Ervin, C. P.; Mudrey, M. G.

355

Superior Labral Anterior Posterior Lesions of the Shoulder  

PubMed Central

Superior labrum anterior and posterior (SLAP) lesion is of fairly recent description and its understanding is rapidly evolving. Its incidence and need for surgical treatment has increased exponentially in line with the increase in shoulder arthroscopies. It is of particular importance in the elite over head athlete and the young. A range of arthroscopic techniques and devices have been described with good functional results. The ability to return to pre injury level of sports remains a concern. PMID:24082975

Malal, Joby Jacob George; Khan, Yousaf; Farrar, Graville; Waseem, Mohammed

2013-01-01

356

Information Superiority generated through proper application of Geoinformatics  

NASA Astrophysics Data System (ADS)

Information Superiority generated through proper application of Geoinformatics Information management and especially geoscience information delivery is a very delicate task. If it is carried out successfully, geoscientific data will provide the main foundation of Information Superiority. However, improper implementation of geodata generation, assimilation, distribution or storage will not only waste valuable resources like manpower or money, but could also give rise to crucial deficiency in knowledge and might lead to potentially extremely harmful disasters or wrong decisions. Comprehensive Approach, Effect Based Operations and Network Enabled Capabilities are the current buzz terms in the security regime. However, they also apply to various interdisciplinary tasks like catastrophe relief missions, civil task operations or even in day to day business operations where geo-science data is used. Based on experience in the application of geoscience data for defence applications the following procedure or tool box for generating geodata should lead to the desired information superiority: 1. Understand and analyse the mission, the task and the environment for which the geodata is needed 2. Carry out a Information Exchange Requirement between the user or customer and the geodata provider 3. Implementation of current interoperability standards and a coherent metadata structure 4. Execute innovative data generation, data provision, data assimilation and data storage 5. Apply a cost-effective and reasonable data life cycle 6. Implement IT security by focusing of the three pillar concepts Integrity, Availability and Confidentiality of the critical data 7. Draft and execute a service level agreement or a memorandum of understanding between the involved parties 8. Execute a Continuous Improvement Cycle These ideas from the IT world should be transferred into the geoscience community and applied in a wide set of scenarios. A standardized approach of how to generate, provide, handle, distribute and store geodata will can reduce costs, strengthen the ties between service costumer and geodata provider and improve the contribution geoscience can make for achieving information superiority for decision makers.

Teichmann, F.

2012-04-01

357

Habitat change in a perched dune system along Lake Superior  

USGS Publications Warehouse

Episodes of habitat change, driven by changes in levels of the Great Lakes, must be considered when assessing human effects upon coastal vegetation and rare species. Paleoecological studies, baseline inventories, and long-term monitoring programs within the Grand Sable Dunes, a perched-dune system along Lake Superior, provide a window on vegetation change at different spatial and temporal scales and also provide an illustrative case study.

Loope, Walter L.; McEachern, A. Kathryn

1998-01-01

358

Familial calcification of the superior transverse scapular ligament causing neuropathy.  

PubMed

Two patients, members of the same family, were found to have entrapment of the suprascapular nerve from a calcified superior transverse scapular ligament. The chief complaint in both cases was pain and weakness and atrophy of the supraspinatus and infraspinatus muscles. The nerve entrapment was confirmed by electromyographic studies and required surgical decompression to relieve the symptoms in both patients. Release of the entrapped nerve resulted in complete pain relief and full return of strength at 1-year followup. PMID:9005905

Cohen, S B; Dines, D M; Moorman, C T

1997-01-01

359

Social concepts are represented in the superior anterior temporal cortex  

PubMed Central

Social concepts such as “tactless” or “honorable” enable us to describe our own as well as others' social behaviors. The prevailing view is that this abstract social semantic knowledge is mainly subserved by the same medial prefrontal regions that are considered essential for mental state attribution and self-reflection. Nevertheless, neurodegeneration of the anterior temporal cortex typically leads to impairments of social behavior as well as general conceptual knowledge. By using functional MRI, we demonstrate that the anterior temporal lobe represents abstract social semantic knowledge in agreement with this patient evidence. The bilateral superior anterior temporal lobes (Brodmann's area 38) are selectively activated when participants judge the meaning relatedness of social concepts (e.g., honor–brave) as compared with concepts describing general animal functions (e.g., nutritious–useful). Remarkably, only activity in the superior anterior temporal cortex, but not the medial prefrontal cortex, correlates with the richness of detail with which social concepts describe social behavior. Furthermore, this anterior temporal lobe activation is independent of emotional valence, whereas medial prefrontal regions show enhanced activation for positive social concepts. Our results demonstrate that the superior anterior temporal cortex plays a key role in social cognition by providing abstract conceptual knowledge of social behaviors. We further speculate that these abstract conceptual representations can be associated with different contexts of social actions and emotions through integration with frontolimbic circuits to enable flexible evaluations of social behavior. PMID:17404215

Zahn, Roland; Moll, Jorge; Krueger, Frank; Huey, Edward D.; Garrido, Griselda; Grafman, Jordan

2007-01-01

360

Prey selection by the Lake Superior fish community  

USGS Publications Warehouse

Mysis diluviana is an important prey item to the Lake Superior fish community as found through a recent diet study. We further evaluated this by relating the quantity of prey found in fish diets to the quantity of prey available to fish, providing insight into feeding behavior and prey preferences. We describe the seasonal prey selection of major fish species collected across 18 stations in Lake Superior in spring, summer, and fall of 2005. Of the major nearshore fish species, bloater (Coregonus hoyi), rainbow smelt (Osmerus mordax), and lake whitefish (Coregonus clupeaformis) consumed Mysis, and strongly selected Mysis over other prey items each season. However, lake whitefish also selected Bythotrephes in the fall when Bythotrephes were numerous. Cisco (Coregonus artedi), a major nearshore and offshore species, fed largely on calanoid copepods, and selected calanoid copepods (spring) and Bythotrephes (summer and fall). Cisco also targeted prey similarly across bathymetric depths. Other major offshore fish species such as kiyi (Coregonus kiyi) and deepwater sculpin (Myoxocephalus thompsoni) fed largely on Mysis, with kiyi targeting Mysis exclusively while deepwater sculpin did not prefer any single prey organism. The major offshore predator siscowet lake trout (Salvelinus namaycush siscowet) consumed deepwater sculpin and coregonines, but selected deepwater sculpin and Mysis each season, with juveniles having a higher selection for Mysis than adults. Our results suggest that Mysis is not only a commonly consumed prey item, but a highly preferred prey item for pelagic, benthic, and piscivorous fishes in nearshore and offshore waters of Lake Superior.

Isaac, Edmund J.; Hrabik, Thomas R.; Stockwell, Jason D.; Gamble, Allison E.

2012-01-01

361

Characteristics and Management of Superior Semicircular Canal Dehiscence  

PubMed Central

Objectives?To review the characteristic symptoms of superior semicircular canal dehiscence, testing and imaging of the disease, and the current treatment and surgical options. Results and Conclusions?Symptoms of superior semicircular canal dehiscence (SSCD) include autophony, inner ear conductive hearing loss, Hennebert sign, and sound-induced episodic vertigo and disequilibrium (Tullio phenomenon), among others. Potential etiologies noted for canal dehiscence include possible developmental abnormalities, congenital defects, chronic otitis media with cholesteatoma, fibrous dysplasia, and high-riding jugular bulb. Computed tomography (CT), vestibular evoked myogenic potentials, Valsalva maneuvers, and certain auditory testing may prove useful in the detection and evaluation of dehiscence syndrome. Multislice temporal bone CT examinations are normally performed with fine-cut (0.5- to 0.6-mm) collimation reformatted to the plane of the superior canal such that images are parallel and orthogonal to the plane. For the successful alleviation of auditory and vestibular symptoms, a bony dehiscence can be surgically resurfaced, plugged, or capped through a middle fossa craniotomy or the transmastoid approach. SSCD should only be surgically treated in patients who exhibit clinical manifestations. PMID:24294552

Yew, Andrew; Zarinkhou, Golmah; Spasic, Marko; Trang, Andy; Gopen, Quinton; Yang, Isaac

2012-01-01

362

Superior Canal Dehiscence Size: Multivariate Assessment of Clinical Impact  

PubMed Central

Objective To examine the association between dehiscence length in patients with superior semicircular canal dehiscence syndrome and their clinical findings, including objective audiometric and vestibular testing results. Study design Retrospective study. Setting Tertiary referral center. Patients Patients included in this study were diagnosed with superior semicircular canal dehiscence syndrome and underwent surgical repair of the dehiscence through middle fossa craniotomy. The dehiscence length was measured intraoperatively in all cases. Main outcome measures Correlation between dehiscence length with pure-tone average (PTA), average bone-conduction threshold, maximal air-bone gap, cervical vestibular evoked myogenic potential (cVEMP) thresholds, and presenting signs and symptoms. Results The correlation between dehiscence length and maximal air-bone gap was statistically significant on both univariate and multivariate regression analyses. The correlations between dehiscence length and PTA, average bone-conduction threshold, cVEMP threshold, and presenting signs and symptoms, were not statistically significant. Conclusions The dehiscence length correlated positively with the maximal air-bone gap in patients with superior semicircular canal dehiscence. The correlation was statistically significant. The dehiscence length did not correlate with the other variables examined in this study. PMID:22664896

Chien, Wade W.; Janky, Kristen; Minor, Lloyd B.; Carey, John P.

2013-01-01

363

Decoding the superior parietal lobule connections of the superior longitudinal fasciculus/arcuate fasciculus in the human brain.  

PubMed

The temporo-parietal (TP) white matter connections between the inferior parietal lobule and superior temporal gyrus as part of the superior longitudinal fasciculus/arcuate fasciculus (SLF/AF) or middle longitudinal fasciculus (MdLF) have been studied in prior diffusion tensor tractography (DTT) studies. However, few studies have been focusing on the higher TP connections of the superior parietal lobule with the temporal lobe. These higher TP connections have been shown to have a role in core processes such as attention, memory, emotions, and language. Our most recent study, for the first time, hinted to the possibility of a long white matter connection interconnecting the superior parietal lobule (SPL) with the posterior temporal lobe in human brain which we call the SLF/AF TP-SPL and for a shorter abbreviation, the TP-SPL. We decided to further investigate this white matter connection using fiber assignment by continuous tracking deterministic tractography and high spatial resolution diffusion tensor imaging on 3T. Five healthy right-handed men (age range 24-37 years) were studied. We delineated the SPL connections of the SLF/AF TP bilaterally in five normal adult human brains. Using a high resolution DTT technique, we demonstrate for the first time, the trajectory of a long fiber bundle connectivity between the SPL and posterior temporal lobe, called the SLF/AF TP-SPL (or the TP-SPL), bilaterally in five healthy adult human brains. We also demonstrate the trajectory of the vertically oriented posterior TP connections, interconnecting the inferior parietal lobule (IPL) with the posterior temporal lobe (TP-IPL) in relation to the TP-SPL, arcuate fasciculus and other major language pathways. In the current study, for the first time, we categorized the TP connections into the anterior and posterior connectivity groups and subcategorized each one into the SPL or IPL connections. PMID:25086308

Kamali, A; Sair, H I; Radmanesh, A; Hasan, K M

2014-09-26

364

Platelets, glycoprotein Ib-IX, and von Willebrand factor are required for FeCl3-induced occlusive thrombus formation in the inferior vena cava of mice  

PubMed Central

Venous thromboembolism is a leading cause of death from cardiovascular disease. Despite the importance of the glycoprotein (GP) Ib-IX/von Willebrand factor (vWF) axis in arterial thrombosis, its requirement in venous, not venule thrombosis in response to endothelial injury (not stenosis or stasis) is uncharacterized. GPIb?-vWF participation in FeCl3-induced thrombus formation was evaluated in the inferior vena cava (IVC). Stable, occlusive thrombus formation in response to FeCl3-induced injury of the IVC was studied. FeCl3 (20% FeCl3, 10 minutes)-induced occlusive thrombosis required platelets as confirmed by a lack of occlusion in thrombocytopenic mice, and stable occlusion in control animals. No IVC occlusion was observed using GPIb?-deficient animals, a model of the human Bernard-Soulier syndrome (BSS). Transgenic IL-4R/GPIb? mice (lack murine GPIb?, but express the extracellular domain of the human interleukin (IL)-4 receptor fused to the transmembrane and cytoplasmic domains of human GPIb?), were studied to determine if the absence of IVC occlusion in the BSS mouse was caused by GPIb? extracellular domain deficiency rather than platelet BSS phenotype associated abnormalities. As with GPIb? knock-out (KO) mice, no occlusion was observed in the IVC of IL-4R/GPIb? mice. The IVC of vWF-deficient mice also failed to occlude in response to FeCl3 treatment. The chimeric protein GPIb?(2V)-Fc prevented occlusion, demonstrating that GPIb?-vWF A1 domain interaction is required for FeCl3-induced stable thrombus formation in the IVC. Therefore, FeCl3-induced stable, occlusive thrombus formation in the IVC is platelet, GPIb?-vWF interaction-dependent despite the large diameter and low venous flow rate in the IVC. PMID:22720736

Joglekar, M.; Ware, Jerry; Xu, Jin; Fitzgerald, Malinda E. C.; Gartner, T. Kent

2013-01-01

365

Long-Term Results of Cell-Free Biodegradable Scaffolds for In Situ Tissue-Engineering Vasculature: In a Canine Inferior Vena Cava Model  

PubMed Central

We have developed a new biodegradable scaffold that does not require any cell seeding to create an in-situ tissue-engineering vasculature (iTEV). Animal experiments were conducted to test its characteristics and long-term efficacy. An 8-mm tubular biodegradable scaffold, consisting of polyglycolide knitted fibers and an L-lactide and ?-caprolactone copolymer sponge with outer glycolide and ?-caprolactone copolymer monofilament reinforcement, was implanted into the inferior vena cava (IVC) of 13 canines. All the animals remained alive without any major complications until euthanasia. The utility of the iTEV was evaluated from 1 to 24 months postoperatively. The elastic modulus of the iTEV determined by an intravascular ultrasound imaging system was about 90% of the native IVC after 1 month. Angiography of the iTEV after 2 years showed a well-formed vasculature without marked stenosis or thrombosis with a mean pressure gradient of 0.51±0.19 mmHg. The length of the iTEV at 2 years had increased by 0.48±0.15 cm compared with the length of the original scaffold (2–3 cm). Histological examinations revealed a well-formed vessel-like vasculature without calcification. Biochemical analyses showed no significant differences in the hydroxyproline, elastin, and calcium contents compared with the native IVC. We concluded that the findings shown above provide direct evidence that the new scaffold can be useful for cell-free tissue-engineering of vasculature. The long-term results revealed that the iTEV was of good quality and had adapted its shape to the needs of the living body. Therefore, this scaffold would be applicable for pediatric cardiovascular surgery involving biocompatible materials. PMID:22532873

Matsumura, Goki; Nitta, Naotaka; Matsuda, Shojiro; Sakamoto, Yuki; Isayama, Noriko; Yamazaki, Kenji; Ikada, Yoshito

2012-01-01

366

Diencephalic connections of the superior colliculus in the hedgehog tenrec.  

PubMed

Using different tracer substances the pathways connecting the superior colliculus with the diencephalon were studied in the Madagascan hedgehog tenrec (Echinops telfairi), a nocturnal insectivore with tiny eyes, a small and little differentiated superior colliculus and a visual cortex with no obvious fourth granular layer. The most prominent tecto-thalamic projection terminated in the ipsilateral dorsal lateral geniculate nucleus. The entire region receiving contralateral retinal afferents was labeled with variable density. In addition, there was a widespread, homogeneously distributed collicular input to the lateralis posterior-pulvinar complex and a distinct tectal projection to the suprageniculate nucleus. The latter projections were bilateral with a clear ipsilateral predominance. Among the intra- and paralaminar nuclei the centralis lateralis complex was most heavily labeled on both sides, followed by the nucleus centralis medialis. The paralamellar portion of the nucleus medialis dorsalis and the nucleus parafascicularis received sparse projections. A clear projection to the nucleus ventralis medialis could not be demonstrated but its presence was not entirely excluded either. There were also projections to medial thalamic nuclei, particularly the reuniens complex and the nucleus paraventricularis thalami. The main tecto-subthalamic target regions were the zona incerta, the dorsal hypothalamus and distinct subdivisons of the ventral lateral geniculate nucleus. These regions also gave rise to projections to the superior colliculus, as did the intergeniculate leaflet. The pathways oriented toward the visual or frontal cortex and the projections possibly involved in limbic and circadian mechanisms were compared with the connectivity patterns reported in mammals with more differentiated brains. Particular attention was given to the tenrec's prominent tecto-geniculate projection, the presumed W- or K-pathway directed toward the supragranular layers. PMID:8911930

Künzle, H

1996-10-01

367

Life history of lake herring in Lake Superior  

USGS Publications Warehouse

The average annual commercial catch of lake herring (Coregonus artedi) in U.S. waters of Lake Superior was nearly 12 million pounds in 1929-61. This production contributed 62.4 percent of the total U.S. take of lake herring for the Great Lakes. About 90 percent of the annual catch is taken from small-mesh gill nets during the November-December spawning season. The life-history studies were based on 12,187 fish collected in 1950-62; past growth was computed for 3,779 specimens collected from commercial landings at: Duluth, Minn.; Bayfield, Wis.; and Portage Entry and Marquette, Mich.

Dryer, William R.; Beil, Joseph

1964-01-01

368

Continuous nanoscale carbon fibers with superior mechanical strength.  

PubMed

Continuous nanoscale carbon fibers can be developed by stabilization and carbonization of highly aligned and extensively stretched electrospun polyacrylonitrile copolymer nanofiber precursor under optimal tension. These carbon fibers, with diameters of tens of nanometers, are expected to possess a superior mechanical strength that is unlikely to be achieved through conventional approaches. This is because i) the innovative precursor, with a fiber diameter approximately 100 times smaller than that of conventional counterparts, possesses an extremely high degree of macromolecular orientation and a significantly reduced amount of structural imperfections, and ii) the ultrasmall fiber diameter also effectively prevents the formation of structural inhomogeneity, particularly sheath/core structures during stabilization and carbonization. PMID:19197971

Liu, Jie; Yue, Zhongren; Fong, Hao

2009-03-01

369

The fine structure of nuclear changes in superior limbic keratoconjunctivitis.  

PubMed

Superior limbic keratoconjunctivitis (SLK) is a condition of unknown etiology. Histological signs include acanthosis, dyskeratosis, keratinization, and ballon degeneration of the bulbar conjunctival epithelium. Ultrastructural examination of biopsy material from five eyes of patients with SLK shows numerous nuclear changes in the conjunctival epithelial cells. These include abnormal distribution and aggregation of nuclear chromatin, the presence of filaments within the nucleus, and dense accumulations of cytoplasmic filaments which surround the nucleus, resulting in "strangulation" and the formation of multilobed nuclei or multinucleated cells. These changes do not appear to have been described previously in any cell type. PMID:621134

Collin, H B; Donshik, P C; Boruchoff, S A; Foster, C S; Cavanagh, H D

1978-01-01

370

33 CFR 117.661 - Duluth Ship Canal (Duluth-Superior Harbor).  

...2014-07-01 2014-07-01 false Duluth Ship Canal (Duluth-Superior Harbor). ...Requirements Minnesota § 117.661 Duluth Ship Canal (Duluth-Superior Harbor). The draw of the Duluth Ship Canal Aerial bridge,...

2014-07-01

371

Spatial Patterns in Assemblage Structures of Pelagic Forage Fish and Zooplankton in Western Lake Superior  

Microsoft Academic Search

We assessed abundance, size, and species composition of forage fish and zooplankton communities of western Lake Superior during August 1996 and July 1997. Data were analyzed for three ecoregions (Duluth-Superior, Apostle Islands, and the open lake) differing in bathymetry and limnological and biological patterns. Zooplankton abundance was three times higher in the Duluth-Superior and Apostle Islands regions than in the

Timothy B. Johnson; Michael H. Hoff; Anett S. Trebitz; Charles R. Bronte; Timothy D. Corry; James F. Kitchell; Stephen J. Lozano; Doran M. Mason; Jill V. Scharold; Stephen T. Schram; Donald R. Schreiner

2004-01-01

372

Visual sensitivity of deepwater fishes in lake superior.  

PubMed

The predator-prey interactions in the offshore food web of Lake Superior have been well documented, but the sensory systems mediating these interactions remain unknown. The deepwater sculpin, (Myoxocephalus thompsoni), siscowet (Salvelinus namaycush siscowet), and kiyi (Coregonus kiyi) inhabit low light level environments. To investigate the potential role of vision in predator-prey interactions, electroretinography was used to determine visual sensitivity for each species. Spectral sensitivity curves revealed peak sensitivity at 525 nm for each species which closely corresponds to the prevalent downwelling light spectrum at depth. To determine if sufficient light was available to mediate predator-prey interactions, visual sensitivity was correlated with the intensity of downwelling light in Lake Superior to construct visual depth profiles for each species. Sufficient daytime irradiance exists for visual interactions to approximately 325 m for siscowet and kiyi and 355 m for the deepwater sculpin during summer months. Under full moon conditions, sufficient irradiance exists to elicit ERG response to light available at approximately 30 m for the siscowet and kiyi and 45 m for the deepwater sculpin. Visual interactions are therefore possible at the depths and times when these organisms overlap in the water column indicating that vision may play a far greater role at depth in deep freshwater lakes than had been previously documented. PMID:25646781

Harrington, Kelly A; Hrabik, Thomas R; Mensinger, Allen F

2015-01-01

373

Douglass Houghton and the Precambrian of Lake Superior  

SciTech Connect

The first chronological subdivision of Precambrian rocks in the Lake Superior area was made in 1841 by Douglass Houghton for the Upper Peninsula of Michigan. In spite of the fact that the then prevailing philosophy of geologic history was quite different from that of today, Houghton's chronological subdivision became the commonly accepted framework for Precambrian studies on the south shore of Lake Superior. Using only megascopic rock analyses and the physical stratigraphic criteria of relative age, Houghton and his assistants recognized these division, in ascending order: the Primary (granite-gneiss-greenstone); the Metamorphic (slates, iron ore, quartz rock); and on the Keweenaw Peninsula, the Trap (with copper ore); the Trap Conglomerate; and the Red Sandrock. This Pioneer study demanded heroic effort and imagination because the swampy, forested terrain was barely penetrable, the outcrops are discontinuous, the rocks are often deformed, and the lithology changes locally within the formations. Houghton was aided in these accomplishments by William A. Burt, a US Linear Surveyor and the inventor of the solar compass, a sextant-like device used to supplement the surveyors compass. Together, Houghton and Burt formed the first combined geological-linear survey in the US. The combined survey was completed by the assistants Houghton had trained so well, William Burt and Bela Hubbard. Their reports (1846, 1847) supplemented Houghton's report of 1841 by showing the areal distribution of the exposed Precambrian rocks in the region thus facilitating future research, prospecting, and development.

Merk, G.

1985-01-01

374

Fish community change in Lake Superior, 1970-2000  

USGS Publications Warehouse

Changes in Lake Superior's fish community are reviewed from 1970 to 2000. Lake trout (Salvelinus namaycush) and lake whitefish (Coregonus clupeaformis) stocks have increased substantially and may be approaching ancestral states. Lake herring (Coregonus artedi) have also recovered, but under sporadic recruitment. Contaminant levels have declined and are in equilibrium with inputs, but toxaphene levels are higher than in all other Great Lakes. Sea lamprey (Petromyzon marinus) control, harvest limits, and stocking fostered recoveries of lake trout and allowed establishment of small nonnative salmonine populations. Natural reproduction supports most salmonine populations, therefore further stocking is not required. Nonnative salmonines will likely remain minor components of the fish community. Forage biomass has shifted from exotic rainbow smelt (Osmerus mordax) to native species, and high predation may prevent their recovery. Introductions of exotics have increased and threaten the recovering fish community. Agencies have little influence on the abundance of forage fish or the major predator, siscowet lake trout, and must now focus on habitat protection and enhancement in nearshore areas and prevent additional species introductions to further restoration. Persistence of Lake Superior's native deepwater species is in contrast to other Great Lakes where restoration will be difficult in the absence of these ecologically important fishes.

Bronte, Charles R.; Ebener, Mark P.; Schreiner, Donald R.; DeVault, David S.; Petzold, Michael M.; Jensen, Douglas A.; Richards, Carl; Lozano, Steven J.

2003-01-01

375

A new look at the Lake Superior biomass size spectrum  

USGS Publications Warehouse

We synthesized data from multiple sampling programs and years to describe the Lake Superior pelagic biomass size structure. Data consisted of Coulter counts for phytoplankton, optical plankton counts for zooplankton, and acoustic surveys for pelagic prey fish. The size spectrum was stable across two time periods separated by 5 years. The primary scaling or overall slope of the normalized biomass size spectra for the combined years was ?1.113, consistent with a previous estimate for Lake Superior (?1.10). Periodic dome structures within the overall biomass size structure were fit to polynomial regressions based on the observed sub-domes within the classical taxonomic positions (algae, zooplankton, and fish). This interpretation of periodic dome delineation was aligned more closely with predator–prey size relationships that exist within the zooplankton (herbivorous, predacious) and fish (planktivorous, piscivorous) taxonomic positions. Domes were spaced approximately every 3.78 log10 units along the axis and with a decreasing peak magnitude of ?4.1 log10 units. The relative position of the algal and herbivorous zooplankton domes predicted well the subsequent biomass domes for larger predatory zooplankton and planktivorous prey fish.

Yurista, Peder M.; Yule, Daniel L.; Balge, Matt; VanAlstine, Jon D.; Thompson, Jo A.; Gamble, Allison E.; Hrabik, Thomas R.; Kelly, John R.; Stockwell, Jason D.; Vinson, Mark

2014-01-01

376

Surgical approach to the superior mid-orbit.  

PubMed

Access to the superior mid-orbit is required for procedures on the levator muscle in the correction of upper eyelid ptosis and in surgery aimed at local lesions in this region. The purpose with this human cadaver study was to clarify the anatomical substrate for a surgical approach to the levator muscle and the upper mid-orbit structures, in which the orbital septum and the retroseptal fat pad is not harmed during surgery. Macro-anatomical dissections and histological examinations were performed on five human orbits from three formalin embalmed cadaver heads. It was found that the orbital septum extends posteriorly from its junction with the levator aponeurosis. This posterior continuation of the orbital septum encloses the superior orbital fat pad and separates this from the anterior surface of the levator muscle. In between the orbital septum and the levator, there is a dissection space that provides a minimal invasive access corridor to the structures in the upper mid-orbit. PMID:23441929

Krohn-Hansen, Dag; Nicolaissen, Bjørn; Meling, Torstein R; Haaskjold, Erling

2013-09-01

377

Visual Sensitivity of Deepwater Fishes in Lake Superior  

PubMed Central

The predator-prey interactions in the offshore food web of Lake Superior have been well documented, but the sensory systems mediating these interactions remain unknown. The deepwater sculpin, (Myoxocephalus thompsoni), siscowet (Salvelinus namaycush siscowet), and kiyi (Coregonus kiyi) inhabit low light level environments. To investigate the potential role of vision in predator-prey interactions, electroretinography was used to determine visual sensitivity for each species. Spectral sensitivity curves revealed peak sensitivity at 525 nm for each species which closely corresponds to the prevalent downwelling light spectrum at depth. To determine if sufficient light was available to mediate predator-prey interactions, visual sensitivity was correlated with the intensity of downwelling light in Lake Superior to construct visual depth profiles for each species. Sufficient daytime irradiance exists for visual interactions to approximately 325 m for siscowet and kiyi and 355 m for the deepwater sculpin during summer months. Under full moon conditions, sufficient irradiance exists to elicit ERG response to light available at approximately 30 m for the siscowet and kiyi and 45 m for the deepwater sculpin. Visual interactions are therefore possible at the depths and times when these organisms overlap in the water column indicating that vision may play a far greater role at depth in deep freshwater lakes than had been previously documented. PMID:25646781

Harrington, Kelly A.; Hrabik, Thomas R.; Mensinger, Allen F.

2015-01-01

378

Congenital Incomplete Fusion of Superior Mesenteric Artery Mimicking Dissection  

PubMed Central

Patient: Male, 62 Final Diagnosis: Superior mesenteric artery anatomic variant Symptoms: Abdominal pain • diarrhea • transcient ischemic attacks Medication: — Clinical Procedure: CT of abdomen and pelvis Specialty: Surgery Objective: Congenital defects/diseases Background: Both spontaneous SMA dissection and anatomical variants of GIT vasculature are well known entities. We present a case initially diagnosed as an SMA dissection on CT, but upon detailed review of the imaging findings was considered to be incompletely fused ventral segmental arteries – a rare anatomic variant not well described before. This finding is clinically significant, as it can mimic a vascular dissection and such a wrong diagnosis will lead to unnecessary investigation and intervention. Case Report: A 62-year-old male patient presented with abdominal pain of uncertain etiology. The initial CT revealed an abnormal appearance of the superior mesenteric artery (SMA) which was diagnosed as SMA dissection. However, the appearance of this ‘dissection’ was unusual and there was a mismatch between the clinical presentation and radiological findings. The scan was reviewed and a 3D reconstruction of the abdominal aortal and visceral arteries was performed. The abnormal appearance of the SMA was deemed to be from a congenital anatomical variant. A review of the embryological origin of gut vasculature provides a likely explanation for this appearance. Conclusions: Ours is an unusual case of a developmental variant that has not been well described hitherto. Attention to the ancillary radiological signs and understanding the embryological origin of the abdominal vasculature is important to distinguish such variants from pathology. PMID:25623118

Sharma, Vasu Keshav; H’ng, Martin Weng Chin

2015-01-01

379

Eddy Covariance Measurements Of CO2 Fluxes Above Lake Superior  

NASA Astrophysics Data System (ADS)

Lake Superior has been reported to be seasonally supersaturated with respect to atmospheric CO2, and fluxes estimated from measured pCO2 would be regionally significant. Comparison of pCO2 within the lake and atmospheric CO2 measured 400 m above ground at a site 100 km south of the lake suggest that ?pCO2 (difference between air and water) is 0-400 ?atm. Application of empirical gas exchange models suggests that the flux out of the lake is 0.1-0.4 g C m-2 d-1. While these fluxes are small compared to daily or monthly averages over nearby terrestrial systems (-8 to +4 g C m-2 d-1), the annual fluxes for the lake (~140 g C m-2 yr-1) are comparable in magnitude but opposite in direction to fluxes over nearby forests (-120 to -300 g C m-2 yr-1). Given the large surface area of Lake Superior, annual emissions of CO2 from the lake (~11 Tg C yr-1) may be regionally significant. To better assess the magnitude of the flux, eddy covariance (EC) measurements of the CO2 flux above the lake were made on six occasions between August 2007 and October 2008. Measurements were made at fixed stations that were 1-20 km from shore in the central region of the lake. EC instrumentation was mounted on top of a 10-m pneumatic mast on board the R/V Agassiz. A Crossbow AHRS300CA was mounted level with the sonic anemometer to enable measured wind vectors to be corrected for ship motion. The adequacy of the motion correction was verified by power spectral analysis of vertical wind speeds, comparison of EC fluxes with bulk aerodynamic calculations, and comparison of latent and sensible heat fluxes with other estimates of these fluxes. Measurements were conducted for an hour at each station; 10-minute average fluxes were computed, and these were then averaged to yield hourly means. The EC CO2 fluxes were in the range of 0.15 to 0.63 g C m-2 d-1 which is similar to the range of estimates cited above, though all measurements were made at times of low wind speeds (1 - 6 m s-1). The mean (± 95% CI) of all measured fluxes (0.28 ± 0.15 g C m-2 d-1 or 100 g C m-2 yr-1) supports the conclusion that Lake Superior is a regionally significant source of CO2 to the atmosphere.

Mwangi, J. M.; Urban, N. R.; Perlinger, J. A.; Bariteau, L.; Fairall, C. W.

2008-12-01

380

A superior edge preserving filter with a systematic analysis  

NASA Technical Reports Server (NTRS)

A new, adaptive, edge preserving filter for use in image processing is presented. It had superior performance when compared to other filters. Termed the contiguous K-average, it aggregates pixels by examining all pixels contiguous to an existing cluster and adding the pixel closest to the mean of the existing cluster. The process is iterated until K pixels were accumulated. Rather than simply compare the visual results of processing with this operator to other filters, some approaches were developed which allow quantitative evaluation of how well and filter performs. Particular attention is given to the standard deviation of noise within a feature and the stability of imagery under iterative processing. Demonstrations illustrate the performance of several filters to discriminate against noise and retain edges, the effect of filtering as a preprocessing step, and the utility of the contiguous K-average filter when used with remote sensing data.

Holladay, Kenneth W.; Rickman, Doug

1991-01-01

381

Anger superiority effect for change detection and change blindness.  

PubMed

In visual search, an angry face in a crowd "pops out" unlike a happy or a neutral face. This "anger superiority effect" conflicts with views of visual perception holding that complex stimulus contents cannot be detected without focused top-down attention. Implicit visual processing of threatening changes was studied by recording event-related potentials (ERPs) using facial stimuli using the change blindness paradigm, in which conscious change detection is eliminated by presenting a blank screen before the changes. Already before their conscious detection, angry faces modulated relatively early emotion sensitive ERPs when appearing among happy and neutral faces, but happy faces only among neutral, not angry faces. Conscious change detection was more efficient for angry than happy faces regardless of background. These findings indicate that the brain can implicitly extract complex emotional information from facial stimuli, and the biological relevance of threatening contents can speed up their break up into visual consciousness. PMID:25129035

Lyyra, Pessi; Hietanen, Jari K; Astikainen, Piia

2014-11-01

382

[Congenital superior radioulnar synostoses. A study of 43 cases].  

PubMed

Superior radioulnar synostosis is a rare abnormality which frequently gives rise to functional disability. Its pattern of inheritance is uncertain. We have studied 29 children, 18 boys and 11 girls, who had a total of 43 such synostoses. Twenty children had significant functional disability. Fourteen required operation, 10 undergoing a Judet's osteotomy and 4 osteotomy of the lower end of the radius. The dominant hand was placed in the position of function, and the other in 30-40 degrees of supination. The osteotomies were secured by pins and supported in a plaster splint. Use of the forearm and hand was improved in all cases. Operation is best carried out between the ages of 4 and 10, and a useful functional improvement can be expected. PMID:3804528

Griffet, J; Berard, J; Michel, C R; Caton, J

1986-01-01

383

A Astronomia no Ensino Superior Brasileiro entre 1808 e 1889  

NASA Astrophysics Data System (ADS)

Este artigo apresenta os principais eventos ocorridos na história do ensino de astronomia nos cursos superiores que existiram no Brasil desde a chegada da Família Real portuguesa em 1808 até o final do período monárquico. Para compor esse esboço histórico, utilizamos, principalmente, livros didáticos, regulamentos, decretos e leis responsáveis pelas organizações dos conteúdos oferecidos e das carreiras dos responsáveis pela disciplina. Na análise do material empregado, investigamos a presença de concepções filosóficas e científicas, que podem ter norteado os conteúdos disciplinares. Não realizamos nenhuma comparação com o ensino de astronomia em outros países. Concluímos mostrando que o estudo de astronomia, durante o período monárquico, foi mais direcionado para a formação d engenheiros do que astrônomos. Gostaríamos de observar que o presente artigo não tem a pretensão de abordar o assunto de maneira completa e detalhada.

Bretones, Paulo S.; Videira, Antonio A. P.

2003-05-01

384

Metabolic Maturation of Auditory Neurones in the Superior Olivary Complex  

PubMed Central

Neuronal activity is energetically costly, but despite its importance, energy production and consumption have been studied in only a few neurone types. Neuroenergetics is of special importance in auditory brainstem nuclei, where neurones exhibit various biophysical adaptations for extraordinary temporal precision and show particularly high firing rates. We have studied the development of energy metabolism in three principal nuclei of the superior olivary complex (SOC) involved in precise binaural processing in the Mongolian gerbil (Meriones unguiculatus). We used immunohistochemistry to quantify metabolic markers for energy consumption (Na+/K+-ATPase) and production (mitochondria, cytochrome c oxidase activity and glucose transporter 3 (GLUT3)). In addition, we calculated neuronal ATP consumption for different postnatal ages (P0–90) based upon published electrophysiological and morphological data. Our calculations relate neuronal processes to the regeneration of Na+ gradients perturbed by neuronal firing, and thus to ATP consumption by Na+/K+-ATPase. The developmental changes of calculated energy consumption closely resemble those of metabolic markers. Both increase before and after hearing onset occurring at P12–13 and reach a plateau thereafter. The increase in Na+/K+-ATPase and mitochondria precedes the rise in GLUT3 levels and is already substantial before hearing onset, whilst GLUT3 levels are scarcely detectable at this age. Based on these findings we assume that auditory inputs crucially contribute to metabolic maturation. In one nucleus, the medial nucleus of the trapezoid body (MNTB), the initial rise in marker levels and calculated ATP consumption occurs distinctly earlier than in the other nuclei investigated, and is almost completed by hearing onset. Our study shows that the mathematical model used is applicable to brainstem neurones. Energy consumption varies markedly between SOC nuclei with their different neuronal properties. Especially for the medial superior olive (MSO), we propose that temporally precise input integration is energetically more costly than the high firing frequencies typical for all SOC nuclei. PMID:23826275

Trattner, Barbara; Gravot, Céline Marie; Grothe, Benedikt; Kunz, Lars

2013-01-01

385

Towards a superior streptokinase for fibrinolytic therapy of vascular thrombosis.  

PubMed

Medical intervention with fibrinolytic drugs such as tissue plasminogen activator (tPA) and streptokinase (SK) is the principal treatment for life-treating thromboembolic disorders. Contrary to tPA, SK is a heterogenic and non-human (bacterial) protein produced by streptococci and its medical application may elicit sever immune and anaphylactic responses that restrict its utilization. Besides, human plasminogen (HPG) activation by SK is not blood-clot specific and associated with a risk of hemorrhage. Despite these limitations, comparative clinical trials on various thrombolytic agents suggested that SK is the most cost-effective fibrinolytic drug and almost as safe as its other counterparts such as tPA. Therefore, a number of studies were conducted to provide structurally modified SK with reduced immunogenicity, higher blood-clot specificity and half-lives. Although there are extensive overlaps in SK structural domains responsible for functionality, immunogenicity and stability that may limit its modifications, various strategies such as genetic manipulations (amino acid substitution /addition /deletion or domain fusions through production of chimeric SK proteins linked to HPG or hirudin) and chemical modification such as (homogenous/site-specific) PEGylation have been employed to develop a superior SK. In addition, data of the latest studies on SK screened from different streptococcal sources indicated the possibility of retrieving naturally occurring SKs with higher activities, less antigenicity and/or more fibrinspecificity. In the present review, after a survey on structure function relationships of SK domains and different strategies for SK improvement, recent advances and potential application of computer and matrix-based analyses for design and introduction of superior SKs will be presented. PMID:23531210

Keramati, Malihe; Mianroodi, Reza Arabi; Memarnejadian, Arash; Mirzaie, Amir; Sazvari, Siamak; Aslani, Mohammad Mehdi; Roohvand, Farzin

2013-09-01

386

Results from a geophysical investigation of Lake Superior's ring structures  

NASA Astrophysics Data System (ADS)

Ring shaped depressions are widely developed on the lake floor of Lake Superior. They have not been widely reported elsewhere. The rings are typically between 200 and 300 m across and up to 5 m deep. The width of the depression ranges between 10 to 30 m. They often occur in closely spaced groups or networks but can also occur as isolated features. Several mechanisms have been proposed to explain the formation of these features; they include syneresis of the fine-grained lake floor sediments, polygonal faulting and dewatering of the lake floor sediments. High resolution bathymetric surveying with a multibeam sonar has revealed that they are comprised of pockmarks arranged in irregular polygonal patterns. Sidescan sonar images of the pockmarks often exhibit increased backscatter about the pock which could be interpreted as evidence of a lag-surface. High-resolution CHIRP sub-bottom profiling across the pocks occasionally reveal chimney-like structures below the lake floor pock. This evidence suggests that the rings were produced by the expulsion of fluid from the lake floor. This appears to have been a basin-wide event. The timing, duration and origin of this are not well known. Neither is the structure of the subsurface plumbing below these features. Here we present results from a geophysical survey conducted in northwestern Lake Superior off the western coast of Isle Royale where both isolated and grouped lake floor rings are well developed. The objectives of the survey were to define the geometry of the sub-surface plumbing below the rings and to possibly gain some insight into how these systems develop. The data collected included two high-resolution pseudo-3D single-channel seismic reflection datasets, one acquired with a small airgun and a second acquired with a CHIRP profiler. Multibeam and sidescan sonar data were also acquired as part of the survey. A 9 m piston core was collected in close proximity to a ring feature. This is used to determine the physical characteristics of the near-surface sediments and to calibrate the seismic data.

Wattrus, N. J.; Gustafson, D.

2010-12-01

387

Superior parietal cortex is critical for the manipulation of information in working memory  

PubMed Central

In recent years, theoretical perspectives on posterior parietal function have evolved beyond the traditional visuospatial processing models to include more diverse cognitive operations, such as long-term and working memory. However, definitive neuropsychological evidence supporting the superior parietal lobule's purported role in working memory has been lacking. Here, we studied human brain lesion patients to determine whether the superior parietal lobule is indeed necessary for working memory. We assessed a wide range of memory functions in three participant groups: superior parietal lesions (n=19), lesions not involving superior parietal cortex (n=146), and no brain lesions (n=55). Superior parietal damage was reliably associated with deficits on tests involving the manipulation and rearrangement of information in working memory, but not on working memory tests requiring only rehearsal and retrieval processes, nor on tests of long-term memory. These results indicate that superior parietal cortex is critically important for the manipulation of information in working memory. PMID:19940193

Koenigs, Michael; Barbey, Aron K.; Postle, Bradley R.; Grafman, Jordan

2009-01-01

388

Superior longitudinal fasciculus and language functioning in healthy aging.  

PubMed

Structural deterioration of brain tissue in older adults is thought to be responsible for the majority of age-related cognitive decline. Disruption of widespread cortical networks due to a loss of axonal integrity may also play an important role. Research examining correlations between structural change and functional decline has focused heavily on working memory, processing speed, and executive processes while other aspects of cognition, such as language functioning, have received less attention. The current study aimed to determine whether age-related changes in the superior longitudinal fasciculus (SLF), are responsible for the deterioration in language functioning associated with age. Subjects included 112 right-handed volunteers (ages 19-76). For each subject, the SLF of the left hemisphere was reconstructed from diffusion tensor images (DTI). Mean fractional anisotropy (FA) values were extracted from parietal (SLFp) and temporal (SLFt) bundles. Language functioning was measured using the Peabody Picture Vocabulary Test (PPVT), Boston Naming Test (BNT), Controlled Oral Word Association Test (COWAT), and Semantic Fluency Test (SFT). Regression analyses revealed that males and females showed a different pattern of decline in FA across adulthood. For males, greater SLFt FA was significantly associated with increased COWAT performance, and there was a positive relationship between both age and SLFp FA with BNT scores. In females, greater SLFp FA was related to lower COWAT performance. Taken together, the results suggest that white matter integrity of the SLF follows a different pattern of decline in adulthood for males and females, and this decline differentially affects language functioning. PMID:24680744

Madhavan, Kiely M; McQueeny, Tim; Howe, Steven R; Shear, Paula; Szaflarski, Jerzy

2014-05-01

389

Interactions between the Midbrain Superior Colliculus and the Basal Ganglia  

PubMed Central

An important component of the architecture of cortico-basal ganglia connections is the parallel, re-entrant looped projections that originate and return to specific regions of the cerebral cortex. However, such loops are unlikely to have been the first evolutionary example of a closed-loop architecture involving the basal ganglia. A phylogenetically older, series of subcortical loops can be shown to link the basal ganglia with many brainstem sensorimotor structures. While the characteristics of individual components of potential subcortical re-entrant loops have been documented, the full extent to which they represent functionally segregated parallel projecting channels remains to be determined. However, for one midbrain structure, the superior colliculus (SC), anatomical evidence for closed-loop connectivity with the basal ganglia is robust, and can serve as an example against which the loop hypothesis can be evaluated for other subcortical structures. Examination of ascending projections from the SC to the thalamus suggests there may be multiple functionally segregated systems. The SC also provides afferent signals to the other principal input nuclei of the basal ganglia, the dopaminergic neurones in substantia nigra and to the subthalamic nucleus. Recent electrophysiological investigations show that the afferent signals originating in the SC carry important information concerning the onset of biologically significant events to each of the basal ganglia input nuclei. Such signals are widely regarded as crucial for the proposed functions of selection and reinforcement learning with which the basal ganglia have so often been associated. PMID:20941324

Redgrave, Peter; Coizet, Veronique; Comoli, Eliane; McHaffie, John G.; Leriche, Mariana; Vautrelle, Nicolas; Hayes, Lauren M.; Overton, Paul

2010-01-01

390

A superior descriptor of random textures and its predictive capacity  

PubMed Central

Two-phase random textures abound in a host of contexts, including porous and composite media, ecological structures, biological media, and astrophysical structures. Questions surrounding the spatial structure of such textures continue to pose many theoretical challenges. For example, can two-point correlation functions be identified that can be manageably measured and yet reflect nontrivial higher-order structural information about the textures? We present a solution to this question by probing the information content of the widest class of different types of two-point functions examined to date using inverse “reconstruction” techniques. This enables us to show that a superior descriptor is the two-point cluster function C2(r), which is sensitive to topological connectedness information. We demonstrate the utility of C2(r) by accurately reconstructing textures drawn from materials science, cosmology, and granular media, among other examples. Our work suggests a theoretical pathway to predict the bulk physical properties of random textures and that also has important ramifications for atomic and molecular systems. PMID:19805040

Jiao, Y.; Stillinger, F. H.; Torquato, S.

2009-01-01

391

Superior palatability of crushed lercanidipine compared with amlodipine among children  

PubMed Central

AIMS To compare the taste of equivalent doses of pulverized amlodipine and lercanidipine, two calcium channel blockers, among children with kidney disease. METHODS Each child received a test dose of 1 mg of amlodipine besylate and 2 mg of lercanidipine in a single-blinded fashion. Children indicated their preference by pointing to the appropriate face on a visual analogue scale (VAS) that depicts five degrees of pleasure. RESULTS The VAS palatability score assigned to lercanidipine was higher than that assigned to amlodipine both in nine children 4–7 years of age (P < 0.005) and in 10 children 8–11 years of age (P < 0.005). The preference for lercanidipine was statistically significant in both girls (P < 0.02) and boys (P < 0.001) and in both children initially presented amlodipine (P < 0.005) and children initially presented lercanidipine (P < 0.005). CONCLUSIONS There is a lack of appropriate formulations for children prescribed drugs originally designed for adults, such as calcium channel blockers. Parents therefore crush available tablets and administer the medication mixed with solid food or a palatable drink. From the perspective of the child, the taste of pulverized lercanidipine is superior to that of pulverized amlodipine. PMID:20233185

Milani, Gregorio; Ragazzi, Monica; Simonetti, Giacomo D; Ramelli, Gian P; Rizzi, Mattia; Bianchetti, Mario G; Fossali, Emilio F

2010-01-01

392

Planar heterojunction perovskite solar cells with superior reproducibility  

NASA Astrophysics Data System (ADS)

Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies have rapidly increased to over 10%, and further improvements are expected. However, the poor device reproducibility of PeSCs ascribed to their inhomogeneously covered film morphology has hindered their practical application. Here, we demonstrate high-performance PeSCs with superior reproducibility by introducing small amounts of N-cyclohexyl-2-pyrrolidone (CHP) as a morphology controller into N,N-dimethylformamide (DMF). As a result, highly homogeneous film morphology, similar to that achieved by vacuum-deposition methods, as well as a high PCE of 10% and an extremely small performance deviation within 0.14% were achieved. This study represents a method for realizing efficient and reproducible planar heterojunction (PHJ) PeSCs through morphology control, taking a major step forward in the low-cost and rapid production of PeSCs by solving one of the biggest problems of PHJ perovskite photovoltaic technology through a facile method.

Jeon, Ye-Jin; Lee, Sehyun; Kang, Rira; Kim, Jueng-Eun; Yeo, Jun-Seok; Lee, Seung-Hoon; Kim, Seok-Soon; Yun, Jin-Mun; Kim, Dong-Yu

2014-11-01

393

Planar heterojunction perovskite solar cells with superior reproducibility  

PubMed Central

Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies have rapidly increased to over 10%, and further improvements are expected. However, the poor device reproducibility of PeSCs ascribed to their inhomogeneously covered film morphology has hindered their practical application. Here, we demonstrate high-performance PeSCs with superior reproducibility by introducing small amounts of N-cyclohexyl-2-pyrrolidone (CHP) as a morphology controller into N,N-dimethylformamide (DMF). As a result, highly homogeneous film morphology, similar to that achieved by vacuum-deposition methods, as well as a high PCE of 10% and an extremely small performance deviation within 0.14% were achieved. This study represents a method for realizing efficient and reproducible planar heterojunction (PHJ) PeSCs through morphology control, taking a major step forward in the low-cost and rapid production of PeSCs by solving one of the biggest problems of PHJ perovskite photovoltaic technology through a facile method. PMID:25377945

Jeon, Ye-Jin; Lee, Sehyun; Kang, Rira; Kim, Jueng-Eun; Yeo, Jun-Seok; Lee, Seung-Hoon; Kim, Seok-Soon; Yun, Jin-Mun; Kim, Dong-Yu

2014-01-01

394

Behavioral and neuroanatomical investigation of Highly Superior Autobiographical Memory (HSAM)  

PubMed Central

A single case study recently documented one woman’s ability to recall accurately vast amounts of autobiographical information, spanning most of her lifetime, without the use of practiced mnemonics (Parker, Cahill, & McGaugh, 2006). The current study reports findings based on eleven participants expressing this same memory ability, now referred to as Highly Superior Autobiographical Memory (HSAM). Participants were identified and subsequently characterized based on screening for memory of public events. They were then tested for personal autobiographical memories as well as for memory assessed by laboratory memory tests. Additionally, whole-brain structural MRI scans were obtained. Results indicated that HSAM participants performed significantly better at recalling public as well as personal autobiographical events as well as the days and dates on which these events occurred. However, their performance was comparable to age- and sex-matched controls on most standard laboratory memory tests. Neuroanatomical results identified nine structures as being morphologically different from those of control participants. The study of HSAM may provide new insights into the neurobiology of autobiographical memory. PMID:22652113

LePort, Aurora K.R.; Mattfeld, Aaron T.; Dickinson-Anson, Heather; Fallon, James H.; Stark, Craig E.L.; Kruggel, Frithjof; Cahill, Larry; McGaugh, James L.

2013-01-01

395

Embryonic Origins of the Mouse Superior Olivary Complex  

PubMed Central

Many areas of the central nervous system are organized into clusters of cell groups, with component cell groups exhibiting diverse but related functions. One such cluster, the superior olivary complex (SOC), is located in the ventral auditory brainstem in mammals. The SOC is an obligatory contact point for most projection neurons of the ventral cochlear nucleus and plays central roles in many aspects of monaural and binaural information processing. Despite their important interrelated functions, little is known about the embryonic origins of SOC nuclei, due in part to a paucity of developmental markers to distinguish individual cell groups. In this report, we present a collection of novel markers for the developing SOC nuclei in mice, including the transcription factors FoxP1, MafB, and Sox2, and the lineage-marking transgenic line En1-Cre. We use these definitive markers to examine the rhombic lip and rhombomeric origins of SOC nuclei and demonstrate that they can serve to uniquely identify SOC nuclei and subnuclei in newborn pups. The markers are also useful in identifying distinct nuclear domains within the presumptive SOC as early as embryonic day (E) 14.5, well before morphological distinction of individual nuclei is evident. These findings indicate that the mediolateral and dorsoventral position of SOC nuclei characteristic of the adult brainstem is established during early neurogenesis. PMID:23303740

Howell, David M.; Spirou, George A.; Mathers, Peter H.

2014-01-01

396

Gillnet selectivity for lake trout (Salvelinus namaycush) in Lake Superior  

USGS Publications Warehouse

Gillnet selectivity for lake trout (Salvelinus namaycush) was estimated indirectly from catches in nets of 102-, 114-, 127-, 140-, and 152-mm stretch measure. Mesh selectivity was modeled as a nonlinear response surface that describes changes in the mean, standard deviation, and skewness of fish lengths across mesh sizes. Gillnet selectivity for lake trout was described by five parameters that explained 88% of the variation in wedged and entangled catches, 81% of the variation in wedged catches, and 82% of the variation in entangled catches. Combined catches of wedged and entangled lake trout were therefore described more parsimoniously than separate catches of wedged and entangled lake trout. Peak selectivity of wedged and entangled fish increased from 588 to 663 mm total length as mesh size increased from 102 to 152 mm, and relative selectivity peaked at a total length of 638 mm. The estimated lake trout population size-frequency indicated that gillnet catches were negatively biased toward both small and large lake trout. As a consequence of this bias, survival of Lake Superior lake trout across ages 9-11 was underestimated by about 20% when the catch curve was not adjusted for gillnet selectivity.

Hansen, Michael J.; Madenjian, Charles P.; Selgeby, James H.; Helser, Thomas E.

1997-01-01

397

Superior mesenteric artery syndrome and its associated gastrointestinal implications.  

PubMed

The superior mesenteric artery (SMA) syndrome is a rare but potentially life-threatening gastrointestinal condition. Over the years, it has been referenced by several names, the most common of which is Wilkie's syndrome. These numerous terminologies have made it difficult to estimate its true frequency in the general population. Common symptoms associated with this syndrome include intermittent postprandial abdominal pain, nausea, and bilious vomiting. Our review revealed that although it is currently well-defined in the literature, the diagnosis of SMA syndrome remains challenging as other disorders can mimic its presentation. However, CT angiography is currently favored in the literature for diagnosis as it can not only show the narrowed aorto-mesenteric angle and distance, but also the extent of duodenal obstruction. In addition, we found no consensus on the preferred mode of therapy once SMA syndrome is diagnosed. The agreement among authors is that the treatment options should be based on severity of the disease, using conservative measures as the first line of therapy in mild SMA syndrome. Duodenojejunostomy is the preferred surgical approach when conservative management fails, or in severe cases. PMID:23959808

Mathenge, Njambi; Osiro, Stephen; Rodriguez, Iliana I; Salib, Christian; Tubbs, R Shane; Loukas, Marios

2014-11-01

398

Is Anterior Cruciate Reconstruction Superior to Conservative Treatment?  

PubMed

Not all patients who have a rupture of the anterior cruciate ligament (ACL) elect to have surgical reconstruction. The aim of this study was to assess the short-to-medium-term results of patients who chose conservative management in comparison to patients who had reconstructive surgery within the same time period. Sixty-three patients with an ACL injury were retrospectively studied. Forty patients were managed, according to patient choice, with ACL reconstruction and 23 conservatively. Four validated questionnaires were used to assess general and knee-specific function in a cohort with a median age of 32 years and a median follow-up period of 38 months. Patients were matched on demographic variables except for gender. There were no statistically significant differences in the outcome measures, and the majority of patients would proceed with the same treatment in the event the control leg became injured. Patients who elect to have conservative management of an ACL rupture can achieve similar function and satisfaction to those who elect to have reconstruction. Until a large randomized controlled trial is conducted, patients need to be made aware of the merits of both management strategies and the lack of evidence of superiority of one over the other. PMID:25438034

Dawson, A G; Hutchison, J D; Sutherland, A G

2014-12-01

399

Anisotropic vanadium dioxide sculptured thin films with superior thermochromic properties  

PubMed Central

VO2 (M) STF through reduction of V2O5 STF was prepared. The results illustrate that V2O5 STF can be successfully obtained by oblique angle thermal evaporation technique. After annealing at 550°C/3?min, the V2O5 STF deposited at 85° can be easily transformed into VO2 STF with slanted columnar structure and superior thermochromic properties. After deposition SiO2 antireflective layer, Tlum of VO2 STF is enhanced 26% and ?Tsol increases 60% compared with that of normal VO2 thin films. Due to the anisotropic microstructure of VO2 STF, angular selectivity transmission of VO2 STF is observed and the solar modulation ability is further improved from 7.2% to 8.7% when light is along columnar direction. Moreover, the phase transition temperature of VO2 STF can be depressed into 54.5°C without doping. Considering the oblique incidence of sunlight on windows, VO2 STF is more beneficial for practical application as smart windows compared with normal homogenous VO2 thin films. PMID:24067743

Sun, Yaoming; Xiao, Xiudi; Xu, Gang; Dong, Guoping; Chai, Guanqi; Zhang, Hua; Liu, Pengyi; Zhu, Hanmin; Zhan, Yongjun

2013-01-01

400

Anisotropic vanadium dioxide sculptured thin films with superior thermochromic properties.  

PubMed

VO2 (M) STF through reduction of V2O5 STF was prepared. The results illustrate that V2O5 STF can be successfully obtained by oblique angle thermal evaporation technique. After annealing at 550 °C/3 min, the V2O5 STF deposited at 85° can be easily transformed into VO2 STF with slanted columnar structure and superior thermochromic properties. After deposition SiO2 antireflective layer, Tlum of VO2 STF is enhanced 26% and ?Tsol increases 60% compared with that of normal VO2 thin films. Due to the anisotropic microstructure of VO2 STF, angular selectivity transmission of VO2 STF is observed and the solar modulation ability is further improved from 7.2% to 8.7% when light is along columnar direction. Moreover, the phase transition temperature of VO2 STF can be depressed into 54.5 °C without doping. Considering the oblique incidence of sunlight on windows, VO2 STF is more beneficial for practical application as smart windows compared with normal homogenous VO2 thin films. PMID:24067743

Sun, Yaoming; Xiao, Xiudi; Xu, Gang; Dong, Guoping; Chai, Guanqi; Zhang, Hua; Liu, Pengyi; Zhu, Hanmin; Zhan, Yongjun

2013-01-01

401

An Emergent Model of Multisensory Integration in Superior Colliculus Neurons  

PubMed Central

Neurons in the cat superior colliculus (SC) integrate information from different senses to enhance their responses to cross-modal stimuli. These multisensory SC neurons receive multiple converging unisensory inputs from many sources; those received from association cortex are critical for the manifestation of multisensory integration. The mechanisms underlying this characteristic property of SC neurons are not completely understood, but can be clarified with the use of mathematical models and computer simulations. Thus the objective of the current effort was to present a plausible model that can explain the main physiological features of multisensory integration based on the current neurological literature regarding the influences received by SC from cortical and subcortical sources. The model assumes the presence of competitive mechanisms between inputs, nonlinearities in NMDA receptor responses, and provides a priori synaptic weights to mimic the normal responses of SC neurons. As a result, it provides a basis for understanding the dependence of multisensory enhancement on an intact association cortex, and simulates the changes in the SC response that occur during NMDA receptor blockade. Finally, it makes testable predictions about why significant response differences are obtained in multisensory SC neurons when they are confronted with pairs of cross-modal and within-modal stimuli. By postulating plausible biological mechanisms to complement those that are already known, the model provides a basis for understanding how SC neurons are capable of engaging in this remarkable process. PMID:20431725

Cuppini, Cristiano; Ursino, Mauro; Magosso, Elisa; Rowland, Benjamin A.; Stein, Barry E.

2010-01-01

402

Planar heterojunction perovskite solar cells with superior reproducibility.  

PubMed

Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies have rapidly increased to over 10%, and further improvements are expected. However, the poor device reproducibility of PeSCs ascribed to their inhomogeneously covered film morphology has hindered their practical application. Here, we demonstrate high-performance PeSCs with superior reproducibility by introducing small amounts of N-cyclohexyl-2-pyrrolidone (CHP) as a morphology controller into N,N-dimethylformamide (DMF). As a result, highly homogeneous film morphology, similar to that achieved by vacuum-deposition methods, as well as a high PCE of 10% and an extremely small performance deviation within 0.14% were achieved. This study represents a method for realizing efficient and reproducible planar heterojunction (PHJ) PeSCs through morphology control, taking a major step forward in the low-cost and rapid production of PeSCs by solving one of the biggest problems of PHJ perovskite photovoltaic technology through a facile method. PMID:25377945

Jeon, Ye-Jin; Lee, Sehyun; Kang, Rira; Kim, Jueng-Eun; Yeo, Jun-Seok; Lee, Seung-Hoon; Kim, Seok-Soon; Yun, Jin-Mun; Kim, Dong-Yu

2014-01-01

403

Noradrenergic synaptic transmission in the superior cervical ganglion.  

PubMed

Morphology of dendrites of principal neurons in the rat superior cervical ganglion (SCG) was re-examined by an intracellular staining method followed by electron microscopic analysis. They exhibit a varying complexity in their morphology and arborization. Some dendrites show specializations such as a glomerular plexus, where extensively branched dendritic collaterals form synaptic connections comprising not only axodendritic synapses between preganglionic axons and principal cell dendrites, but also dendrodendritic synapses between principal cell dendrites. Most presynaptic elements of adrenergic synapses observed by conventional methods appear to represent these specialized dendritic collaterals of principal neurons. In denervated SCG, focal stimulation revoked an inhibitory postsynaptic potential in some principal neurons. The response was completely blocked by yohimbine, an alpha 2-adrenoceptor antagonist. The inhibitory synaptic connection between principal neurons via dendrodendritic synapses may be an important addition to the conventional scheme of intraganglionic synaptic transmission. Sympathetic ganglia may thus function as more than a simple relay station, with specialized neuronal circuitry that may be involved in the modulation of cholinergic transmission. PMID:10361402

Kawai, Y

1999-04-01

404

Similarity of superior colliculus involvement in microsaccade and saccade generation.  

PubMed

The characteristics of microsaccades, or small fixational saccades, and their influence on visual function have been studied extensively. However, the detailed mechanisms for generating these movements are less understood. We recently found that the superior colliculus (SC), a midbrain structure involved in saccade generation, also plays a role in microsaccade generation. Here we compared the dynamics of neuronal activity in the SC associated with microsaccades to those observed in this structure in association with larger voluntary saccades. We found that microsaccade-related activity in the SC is characterized by a gradual increase in firing rate starting ?100 ms prior to microsaccade onset, a peak of neuronal discharge just after movement onset, and a subsequent gradual decrease in firing rate until ?100 ms after movement onset. These properties were shared with saccade-related SC neurons, recorded from the same monkeys but preferring larger eye movements, suggesting that at the level of the SC the neuronal control of microsaccades is similar to that for larger voluntary saccades. We also found that neurons exhibiting microsaccade-related activity often also exhibited saccade-related activity for slightly larger movements of similar direction, suggesting a continuity of the spatial representation in the SC, in both amplitude and direction, down to the smallest movements. Our results indicate that the mechanisms controlling microsaccades may be fundamentally the same as those for larger saccades, and thus shed new light on the functional role of these eye movements and their possible influence on sensory and sensory-motor processes. PMID:22236714

Hafed, Ziad M; Krauzlis, Richard J

2012-04-01

405

Avoiding superior tilt in reverse shoulder arthroplasty: a review of the literature and technical recommendations.  

PubMed

Superior tilt of the baseplate component in reverse total shoulder arthroplasty leads to tensile baseplate forces and may be a contributor to early loosening. The risk factors for this implant malposition include inadequate exposure through a superior approach and superior glenoid bone deficiency that obscures the native glenoid tilt. Here we review our preoperative evaluation and surgical management strategies to avoid superior tilt. Adequate exposure with a superior approach can be achieved but requires not just proper surgical technique but also careful patient selection. We propose that the superior approach be considered only for acute proximal humerus fractures or in patients when the following criteria are met: no prior open surgery on the shoulder; more than 30° of passive external rotation at 0° of abduction; no medial humeral osteophytes; and any superior migration must be reducible with a sulcus test during examination under anesthesia. Avoiding superior tilt when there is significant superior glenoid erosion can be accomplished with humeral head autograft, most easily performed through a deltopectoral approach. Preoperative templating is critical to determine proper graft thickness, inclination, reaming depth, and harvest technique. PMID:25220202

Laver, Lior; Garrigues, Grant E

2014-10-01

406

Cortical projections to the superior colliculus in tree shrews (Tupaia belangeri)  

PubMed Central

The visuomotor functions of the superior colliculus depend not only on direct inputs from the retina, but also on inputs from neocortex. As mammals vary in the areal organization of neocortex, and in the organization of the number of visual and visuomotor areas, patterns of corticotectal projections vary. Primates in particular have a large number of visual areas projecting to the superior colliculus. As tree shrews are close relatives of primates, and they are also highly visual, we studied the distribution of cortical neurons projecting to the superior colliculus by injecting anatomical tracers into the colliculus. Since projections from visuotopically organized visual areas are expected to match the visuotopy of the superior colliculus, injections at different retinotopic locations in the superior colliculus provide information about the locations and organization of topographic areas in extrastriate cortex. Small injections in the superior colliculus labeled neurons in locations within areas 17 (V1) and 18 (V2) that are consistent with the known topography of these areas and the superior colliculus. In addition, the separate locations of clusters of labeled cells in temporal visual cortex provide evidence for five or more topographically organized areas. Injections that included deeper layers of the superior colliculus also labeled neurons in medial frontal cortex, likely in premotor cortex. Only occasional labeled neurons were observed in somatosensory or auditory cortex. Regardless of tracer injection location, we found that unlike primates, a substantial projection to the superior colliculus from posterior parietal cortex is not a characteristic of tree shrews. PMID:23124770

Baldwin, Mary K L; Wei, Haiyang; Reed, Jamie L; Bickford, Martha E; Petry, Heywood M; Kaas, Jon H

2012-01-01

407

Age and growth of the whitefish in Lake Superior  

USGS Publications Warehouse

The average annual commercial production of whitefish in the U.S. waters of Lake Superior dropped from 2,194,000 pounds in 1879-1908 to 504,000 pounds in 1911-59. The modern production, though far below the earlier, has accounted for more than 10 percent of the total value of the fishery in all but one of the last 20 years. Data are given on growth rate, age and year-class composition, size distribution, and length-weight relation of 1,800 fish collected in 1957-59 at Bayfield, Wis., and Marquette, Whitefish Point, and Dollar Settlement, Mich. Studies of the body-scale relation, sex ratio, and age and size at maturity were limited to fish collected at Bayfield. The age composition and mean age varied widely by port and year of capture. Oldest fish were those of the 1957 Bayfield samples which were dominated by age group VII and averaged 5.5 years old. The youngest were from Whitefish Point in 1959; age-group III was dominant, and the mean age was 3.2 years. The evidence on the strength of year classes was not clear-cut, but it was obvious that fluctuations in stocks of different areas were largely independent. The percentage of legal-size fish (17 inches or longer) in age groups ranged widely; only 8.6 percent of the V group were legal in the 1957 Bayfield collections, whereas 100 percent of fish of the same age were legal in the 1957-59 collections from Whitefish Point. The weight of whitefish in the combined samples increased as the 3.2408 power of the length. The growth rate from the fastest to the slowest growing stocks ranked as follows: Whitefish Point; Dollar Settlement and Marquette (fish from the two ports reversed ranks after 3 years); Bayfield. The major differences in growth in length among the various stocks occurred during the first years of life. Beyond the fifth year the annual increments were nearly the same in all stocks. The whitefish from Whitefish Point, Dollar Settlement, and Marquette are among the fastest growing in the Great Lakes. The differences among the Lake Superior stocks in age and year-class composition, and in growth rate offer convincing evidence that populations of different areas are entirely independent. The sexes were almost equally represented (51.5 percent males) in the combined Bayfield samples, but males were scarce in age groups older than VIII. Whitefish from Bayfield shorter than 14.5 inches were immature and those larger than 17.4 inches were mature. The youngest mature fish belonged to age-group V,and all older than the VII group were mature.

Dryer, William R.

1963-01-01

408

Variations in superior thyroid artery: A selective angiographic study  

PubMed Central

Aim: To investigate variations in superior thyroid artery (STA) based on digital subtraction angiography (DSA). Materials and Methods: Twenty five angiography studies of 15 pts performed between June 2010 and December 2012 were retrospectively evaluated. These patients underwent DSA of the head and neck region as a part of their superselective neoadjuvant intra-arterial chemotherapy protocol for treatment of laryngeal and hypopharyngeal cancers. Depending upon the location of the tumor, unilateral or bilateral arteriograms of common carotid artery (CCA), external carotid artery (ECA), and STA were performed. Arteriograms were evaluated for the site of origin and branching pattern of STA. STA anatomy was ascribed to one of the three branching patterns. Results: A total of 25 angiograms were evaluated, including 14 right and 11 left. On the right side, STA was noted to arise from ECA in 10 (71.5%), bifurcation of CCA in 3 (21.5%), and CCA in 1 (7%) patient. Left STA was seen to arise from ECA in 8 (72.5%), bifurcation of CCA in 2 (18.5%), and internal carotid artery (ICA) in 1 (9%) patient. Type III branching pattern (non-bifurcation, non-trifurcation) was found to be the most frequent (52%). Infrahyoid branch was found to be the most consistent in terms of its origin from STA. Conclusions: Origin of STA is predictable, arising from ECA in more than 70% cases. Branching pattern of STA, following origin from ECA, is, however, highly variable. Knowledge concerning the origin and branching pattern of STA is essential in enhancing precision and decreasing morbidity related to the surgical and interventional radiological head and neck procedures. PMID:24851008

Gupta, Pankaj; Bhalla, Ashu Seith; Thulkar, Sanjay; Kumar, Atin; Mohanti, Bidhu Kalyan; Thakar, Alok; Sharma, Atul

2014-01-01

409

Superior epigastric artery perforator flap for sternal osteomyelitis defect reconstruction.  

PubMed

Sternal osteomyelitis after median sternotomy is associated with considerable morbidity and mortality. Combined with radical debridement, muscle and less frequently omentum flaps are used to reconstruct the resulting defects. In this study, we present our experience with the fasciocutaneous superior epigastric artery perforator (SEAP) flap for defect closure. After resection of the entire sternum, including the costochondral arches and the sternoclavicular joints, the repair of the defect was performed with the perforator flap without any re-stabilisation of the thoracic wall. A consecutive series of nine patients with a mean age of 69 ± 6 years were reconstructed with the SEAP flap. The mortality rate was zero. One patient developed a mediastinal haematoma and required five re-interventions by the cardiothoracic surgeons and thereafter a revision to close a small-wound dehiscence at the tip of the flap. Another two patients developed partial necrosis of the flap that could be managed conservatively. One patient had a revision for a seroma on the donor site, resulting in a 100% closure rate of the defect; there were revisions in two out of nine patients. The underlying infection was controlled by debridement, antibiotic therapy and flap closure in all cases. The overall success of the procedure was satisfactory; however, the local complication rate was relatively high with three out of nine patients on the flap side and one of nine on the donor site. Major advantages of the perforator flap in this highly morbid patient cohort are that the operation is relatively quick, muscle tissue is spared and re-education facilitated. PMID:24560800

Wettstein, R; Weisser, M; Schaefer, D J; Kalbermatten, D F

2014-05-01

410

Coding of multisensory temporal patterns in human superior temporal sulcus  

PubMed Central

Philosophers, psychologists, and neuroscientists have long been interested in how the temporal aspects of perception are represented in the brain. In the present study, we investigated the neural basis of the temporal perception of synchrony/asynchrony for audiovisual speech stimuli using functional magnetic resonance imaging (fMRI). Subjects judged the temporal relation of (a)synchronous audiovisual speech streams, and indicated any changes in their perception of the stimuli over time. Differential hemodynamic responses for synchronous versus asynchronous stimuli were observed in the multisensory superior temporal sulcus complex (mSTS-c) and prefrontal cortex. Within mSTS-c we found adjacent regions expressing an enhanced BOLD-response to the different physical (a)synchrony conditions. These regions were further modulated by the subjects' perceptual state. By calculating the distances between the modulated regions within mSTS-c in single-subjects we demonstrate that the “auditory leading (AL)” and “visual leading (VL) areas” lie closer to “synchrony areas” than to each other. Moreover, analysis of interregional connectivity indicates a stronger functional connection between multisensory prefrontal cortex and mSTS-c during the perception of asynchrony. Taken together, these results therefore suggest the presence of distinct sub-regions within the human STS-c for the maintenance of temporal relations for audiovisual speech stimuli plus differential functional connectivity with prefrontal regions. The respective local activity in mSTS-c is dependent both upon the physical properties of the stimuli presented and upon the subjects' perception of (a)synchrony. PMID:22973202

Noesselt, Tömme; Bergmann, Daniel; Heinze, Hans-Jochen; Münte, Thomas; Spence, Charles

2012-01-01

411

Discharge patterns in the lateral superior olive of decerebrate cats  

PubMed Central

Anatomical and pharmacological studies have shown that the lateral superior olive (LSO) receives inputs from a number of sources and that LSO cells can alter the balance of their own excitatory and inhibitory drive. It is thus likely that the ongoing sound-evoked responses of LSO cells reflect a complex interplay of excitatory and inhibitory events, which may be affected by anesthesia. The goal of this study was to characterize the temporal discharge patterns of single units in the LSO of unanesthetized, decerebrate cats in response to long-duration ipsilateral best-frequency tone bursts. A decision tree is presented to partition LSO units on the basis of poststimulus time histogram shape, adaptation of instantaneous firing rate as a function of time, and sustained discharge rate. The results suggest that LSO discharge patterns form a continuum with four archetypes: sustained choppers that show two or more peaks of activity at stimulus onset and little adaptation of rate throughout the response, transient choppers that undergo a decrease in rate that eventually stabilizes with time, primary-like units that display an initial peak of activity followed by a monotonic decline in rate to a steady-state value, and onset-sustained units that exhibit an initial peak of activity at stimulus onset followed by a low sustained activity. Compared with the chopper units, the nonchopper units tend to show longer first-spike latencies, lower peak firing rates, and more irregular sustained discharge patterns. Modeling studies show that the full range of LSO response types can be obtained from an underlying sustained chopper by varying the strength and latency of a sound-driven ipsilateral inhibition relative to that of excitation. Together, these results suggest that inhibition plays a major role in shaping the temporal discharge patterns of units in unanesthetized preparations. PMID:22745462

Greene, Nathaniel T.

2012-01-01

412

Age-Related Attenuation of Dominant Hand Superiority  

PubMed Central

Background The decline of motor performance of the human hand-arm system with age is well-documented. While dominant hand performance is superior to that of the non-dominant hand in young individuals, little is known of possible age-related changes in hand dominance. We investigated age-related alterations of hand dominance in 20 to 90 year old subjects. All subjects were unambiguously right-handed according to the Edinburgh Handedness Inventory. In Experiment 1, motor performance for aiming, postural tremor, precision of arm-hand movement, speed of arm-hand movement, and wrist-finger speed tasks were tested. In Experiment 2, accelerometer-sensors were used to obtain objective records of hand use in everyday activities. Principal Findings Our data confirm previous findings of a general task-dependent decline in motor performance with age. Analysis of the relationship between right/left-hand performances using a laterality index showed a loss of right hand dominance with advancing age. The clear right-hand advantage present at younger ages changed to a more balanced performance in advanced age. This shift was due to a more pronounced age-related decline of right hand performance. Accelerometer-sensor measurements supported these findings by demonstrating that the frequency of hand use also shifted from a clear right hand preference in young adults to a more balanced usage of both hands in old age. Despite these age-related changes in the relative level of performance in defined motor tasks and in the frequency of hand use, elderly subjects continued to rate themselves as unambiguous right-handers. Conclusion The discrepancy between hand-specific practical performance in controlled motor tests as well as under everyday conditions and the results of questionnaires concerning hand use and hand dominance suggests that most elderly subjects are unaware of the changes in hand dominance that occur over their lifespan, i.e., a shift to ambidexterity. PMID:17183722

Kalisch, Tobias; Wilimzig, Claudia; Kleibel, Nadine; Tegenthoff, Martin; Dinse, Hubert R.

2006-01-01

413

Visual fixation as equilibrium: Evidence from superior colliculus inactivation  

PubMed Central

During visual fixation, the image of an object is maintained within the fovea. Previous studies have shown that such maintenance involves the deep superior colliculus (dSC). However, the mechanisms by which the dSC supports visual fixation remain controversial. According to one view, activity in the rostral dSC maintains gaze direction by preventing neurons in the caudal dSC from issuing saccade commands. An alternative hypothesis proposes that gaze direction is achieved through equilibrium of target position signals originating from the two dSC. Here we show in monkeys that artificially reducing activity in the rostral half of one dSC results in a biased estimate of target position during fixation, consistent with the second hypothesis, rather than an inability to maintain gaze fixation as predicted by the first hypothesis. After injection of muscimol at rostral sites in the dSC, fixation became more stable since microsaccade rate was reduced rather than increased. Moreover, the scatter of eye positions was offset relative to pre-inactivation baselines. The magnitude and the direction of the offsets depended upon both the target size and the injected site in the collicular map. Other oculomotor parameters, such as the accuracy of saccades to peripheral targets and the amplitude and velocity of fixational saccades, were largely unaffected. These results suggest that the rostral half of the dSC supports visual fixation through a distributed representation of behaviorally-relevant target position signals. The inactivation-induced fixation offset establishes the foveal visual stimulation that is required to restore the balance of activity between the two dSC. PMID:22855812

Goffart, Laurent; Hafed, Ziad M.; Krauzlis, Richard J.

2012-01-01

414

Second-Side Surgery in Superior Canal Dehiscence Syndrome  

PubMed Central

Objective Bilateral superior canal (SC) dehiscence syndrome poses a challenge because bilateral SC dehiscence (SCD) plugging might be expected to result in oscillopsia and disability. Our aims were as follows: 1) to evaluate which symptoms prompted patients with bilateral SCD syndrome (SCDS) to seek second-side surgery, and 2) to determine the prevalence of disabling imbalance and oscillopsia after bilateral SC plugging. Study Design Prospective observational study. Setting Tertiary referral center. Patients Five patients with bilateral SCDS based on history, audiometric and physiologic testing, and computed tomographic findings. This includes all of our patients who have had second-side plugging surgery to date. Intervention(s) Bilateral sequential middle fossa craniotomy and plugging of SCs. Main Outcome Measure(s) Cochleovestibular symptoms, cervical and ocular vestibular-evoked myogenic potential testing, dizziness handicap inventory, short-form 36 Health Survey, dynamic visual acuity testing. Results The most common symptoms prompting second-side surgery were sound- and pressure-induced vertigo and autophony. Three of the 5 patients reported that symptoms shifted to the contralateral ear immediately after plugging the first side, whereas in 2 patients, contralateral symptoms developed several years after the first SC plugging. Two of 4 patients experienced ongoing oscillopsia after bilateral SCDS surgery; however, all patients reported relief from their SCD symptoms and were glad that they had pursued bilateral surgery. Conclusion In patients with bilateral SCDS, sound- and pressure-induced vertigo most commonly prompted second-side surgery. Despite some degree of oscillopsia after bilateral SCDS surgery, patients were very satisfied with second-side surgery, given their relief from other SCDS symptoms. PMID:22158019

Agrawal, Yuri; Minor, Lloyd B.; Schubert, Michael C.; Janky, Kristen L.; Davalos-Bichara, Marcela; Carey, John P.

2014-01-01

415

Hydroacoustic Estimates of Abundance and Spatial Distribution of Pelagic Prey Fishes in Western Lake Superior  

Microsoft Academic Search

Lake herring (Coregonus artedi) and rainbow smelt (Osmerus mordax) are a valuable prey resource for the recovering lake trout (Salvelinus namaycush) in Lake Superior. However, prey biomass may be insufficient to support the current predator demand. In August 1997, we assessed the abundance and spatial distribution of pelagic coregonines and rainbow smelt in western Lake Superior by combining a 120

Doran M. Mason; Timothy B. Johnson; Chris J. Harvey; James F. Kitchell; Stephen T. Schram; Charles R. Bronte; Michael H. Hoff; Steven J. Lozano; Anett S. Trebitz; Donald R. Schreiner; E. Conrad Lamon; Thomas Hrabik

2005-01-01

416

Decline of the Shortjaw Cisco in Lake Superior: The Role of Overfishing and Risk of Extinction  

Microsoft Academic Search

Recent reviews have further documented the decline of the shortjaw cisco Coregonus zenithicus in Lake Superior. This fish was the most abundant deepwater cisco species in Lake Superior in the early 1920s but presently makes up less than 1% of all deepwater ciscoes (i.e., including shortjaw cisco, bloater C. hoyi, and kiyi C. kiyi) captured in biological surveys. Directed overfishing

Charles R. Bronte; Michael H. Hoff; Owen T. Gorman; Wayne E. Thogmartin; Philip J. Schneeberger; Thomas N. Todd

2010-01-01

417

Governo apresenta reforma da rede do Superior em Maro sem contributo dos reitores  

E-print Network

Governo apresenta reforma da rede do Superior em Março sem contributo dos reitores O Ministério da a racionalização da rede do Superior que vai passar pela cria- ção de consórcios entre universida- des e

Instituto de Sistemas e Robotica

418

Good genes and old age: Do old mates provide superior genes?  

Microsoft Academic Search

It has been suggested that female preference for older mates in species without parental care has evolved in response to an alleged higher genetic quality of older individuals. This is based on the widespread assumption that viability selection produces older individuals that are genetically superior to younger individuals. In contrast, we propose that the oldest individuals rarely are genetically superior.

T. F. Hansen; D. K. Price

1995-01-01

419

INFLUENCES OF HYDROLOGY ON NUTRIENT DYNAMICS IN LAKE SUPERIOR COASTAL WETLANDS  

EPA Science Inventory

Little is known about the role of the coastal wetlands (CWs) of Lake Superior in modifying or contributing to nutrient fluxes from watersheds to the lake. We are studying factors controlling nutrient retention and transformation of CWs in Western Lake Superior. CWs may be unique ...

420

Target Selection for Saccadic Eye Movements: Direction-Selective Visual Responses in the Superior Colliculus  

E-print Network

Target Selection for Saccadic Eye Movements: Direction-Selective Visual Responses in the Superior for saccadic eye movements: direction-selective visual responses in the superior colliculus. J Neurophysiol 86 discriminated between opposed directions of visual motion and indicated its judgment by making a saccadic eye

Newsome, William

421

A multidisciplinary surgical approach to superior sulcus tumors with vertebral invasion  

Microsoft Academic Search

Background. Vertebral body invasion by superior sulcus tumor has traditionally been considered a contraindication to surgical resection. Attempts at definitive radiation or chemoradiation have not been successful. Recent advances in spinal instrumentation have allowed more complete resection of vertebral body tumors. We, therefore, reviewed our recent experience with vertebral resection of superior sulcus tumors.Methods. All patients (n = 17) undergoing

Sunil Gandhi; Garrett L Walsh; Ritsuko Komaki; Ziya L Gokaslan; Jonathan C Nesbitt; Joe B Putnam; Jack A Roth; Kelly W Merriman; Ian E McCutcheon; Reginald F Munden; Stephen G Swisher

1999-01-01

422

Desafíos y cambios, retos impostergables para la educación superior agrícola de la Universidad Rómulo Gallegos  

Microsoft Academic Search

Resumen: La educación superior latinoamericana y particularmente la educación superior agrícola venezolana, reflexionan en torno al para qué, al cómo, con quién y cuándo implementar los cambios que demanda la realidad del sector agrícola, planteados en los enunciados principistas de nuestra carta fundamental y sus leyes, por las demandas y desafíos que en el sector vienen planteando las instancias que

Dany Silvestre; Argenis Cedeño; Pedro Soler; Rafael Pérez; Wilmer Sánchez

423

Why is visual search superior in autism spectrum disorder? Robert M. Joseph,1  

E-print Network

PAPER Why is visual search superior in autism spectrum disorder? Robert M. Joseph,1 Brandon Keehn,1 underlies the superior visual search skills exhibited by individuals with autism spectrum disorder (ASD). We augments their visual search abilities. Analyses of RT x set size functions showed no group differences

424

Superior mesenteric artery stenosis treated with percutaneous transluminal angioplasty and stent placement.  

PubMed

We present a case of a man with concentric significant stenoses in the superior mesenteric artery and the celiac trunk, in whom percutaneous transluminal angioplasty did not provide sufficient technical result. We report the successful use of balloon expandable Perflex stent to treat superior mesenteric artery stenosis. PMID:15314992

Pietura, Rados?aw; Szyma?ska, Anna; Janicki, Krzysztof; Bojarska, Anna; Szczerbo-Trojanowska, Ma?gorzata

2003-01-01

425

Stent placement in coeliac and superior mesenteric arteries to restore vascular perfusion following aortic dissection.  

PubMed

The main trunks of both coeliac and superior mesenteric arteries were sheared off the abdominal aorta by an anterior dissection that spared the renal arteries. Both vessels were cannulated and a Walstent inserted across the false lumen to restore normal coeliac and superior mesenteric perfusion. This produced a successful haemodynamic and angiographic result with improvement in the patient's clinical condition. PMID:7695533

Connell, D A; Thomson, K R; Gibson, R N; Wall, A J

1995-02-01

426

Is There a Limit to the Superiority of Individuals with ASD in Visual Search?  

ERIC Educational Resources Information Center

Superiority in visual search for individuals diagnosed with autism spectrum disorder (ASD) is a well-reported finding. We administered two visual search tasks to individuals with ASD and matched controls. One showed no difference between the groups, and one did show the expected superior performance for individuals with ASD. These results offer an…

Hessels, Roy S.; Hooge, Ignace T. C.; Snijders, Tineke M.; Kemner, Chantal

2014-01-01

427

Recent advances in hydrogels in terms of fast stimuli responsiveness and superior mechanical performance  

Microsoft Academic Search

This review addresses the potential development of polymer hydrogels in terms of fast stimuli responsiveness and superior mechanical properties. The slow response and mechanical weakness of stimuli-sensitive hydrogels have been considered as the main barriers for their further development and practical application. It has been a dream of scientists to have fast stimuli-responsive hydrogels with superior mechanical performance. In this

Abu Bin Imran; Takahiro Seki; Yukikazu Takeoka

2010-01-01

428

MERCURY IN METAL ORE DEPOSITS: AN UNRECOGNIZED, WIDESPREAD SOURCE TO LAKE SUPERIOR SEDIMENTS, CONTRIBUTION #1072  

EPA Science Inventory

Mining operations have worked the rich mineral resources of the Lake Superior Basin for over 150 years, leaving industrially impacted regions with tailing piles and smelters. In Lake Superior sediments, mercury and copper inventories increase towards shorelines and are highly cor...

429

Lake Trout ( Salvelinus namaycush) Populations in Lake Superior and Their Restoration in 1959–1993  

Microsoft Academic Search

Naturally-reproducing populations of lake trout (Salvelinus namaycush) have been reestablished in most of Lake Superior, but have not been restored to 1929-1943 average abundance. Progress toward lake trout restoration in Lake Superior is described, management actions are reviewed, and the effectiveness of those actions is evaluated; especially stocking lake trout as a tool for building spawning stocks, and subsequently, populations

Michael J. Hansen; James W. Peck; Richard G. Schorfhaar; James H. Selgeby; Donald R. Schreiner; Stephen T. Schram; Bruce L. Swanson; Wayne R. MacCallum; Mary K. Burnham-Curtis; Gary L. Curtis; John W. Heinrich; Robert J. Young

1995-01-01

430

Trophic connections in Lake Superior Part I: The offshore fish community  

Microsoft Academic Search

Detailed diet linkages within the offshore (>80m bathymetric depth) food web of Lake Superior are currently not well identified. We used analyses of fish stomach contents to create an empirically based food web model of the Lake Superior offshore fish community. Stomachs were collected seasonally (spring, summer, and fall) from nine offshore locations in 2005, using bottom and midwater trawls.

Allison E. Gamble; Thomas R. Hrabik; Jason D. Stockwell; Daniel L. Yule

2011-01-01

431

Word-Superiority Effect as a Function of Semantic Transparency of Chinese Bimorphemic Compound Words  

ERIC Educational Resources Information Center

The word-superiority effect (WSE) describes the superior recognition of word constituents in a word, as opposed to a non-word, context. In this study, the WSE was used as a diagnostic tool to examine the modulatory effect of word semantic transparency on the degree to which Chinese bimorphemic compound words are lexically represented as unitised…

Mok, Leh Woon

2009-01-01

432

The Superior Pupil in Junior High School Mathematics. Bulletin, 1955, No. 4  

ERIC Educational Resources Information Center

This report presents ways to identify the superior pupil and methods to provide for his needs. For the purposes of this report, superior pupils are defined as rapid learners in academic subjects. They are the pupils in the upper 20 percent in general intelligence whose abilities lend themselves readily to intellectual pursuits. This report…

McWilliams, Earl M.; Brown, Kenneth E.

1955-01-01

433

The Vernacular Watercraft of Isle Royale: a western Lake Superior boatbuilding tradition  

E-print Network

South Shore of Lake Superior, Montreal River to Marquette The Michigan South Shore of Lake Superior, Marquette to Sault Ste. Marie 48 53 54 FIGURE 6. A section of hook line rig 63 FIGURE 7 FIGURE 8. FIGURE 9. FIGURE 10. FIGURE 11. FIGURE 12...

Tolson, Hawk

1992-01-01

434

Management Perspectives on Coaster Brook Trout Rehabilitation in the Lake Superior Basin  

Microsoft Academic Search

Coaster brook trout are a migratory form of brook trout Salvelinus fontinalis that spend part of their lives in the Great Lakes. Over the last century the abundance of coaster brook trout in Lake Superior has declined dramatically, and only remnant stocks remain. Recently, the rehabilitation of coaster brook trout in Lake Superior has become a goal of fish management

Donald R. Schreiner; Ken I. Cullis; Michael C. Donofrio; Gregory J. Fischer; Laura Hewitt; Karen G. Mumford; Dennis M. Pratt; Henry R. Quinlan; Steven J. Scott

2008-01-01

435

Response Characteristics of Single Cells in the Monkey Superior Colliculus Following Ablation or  

E-print Network

Response Characteristics of Single Cells in the Monkey Superior Colliculus Following Ablation the contribution of visual cortex to collicular function in the rhesus monkey (Macaca mulatta), a species whose that in the monkey, as in the cat, retina and visual cortex project densely on the superior colliculus (8

Stryker, Michael

436

Visual detection deficits following inactivation of the superior colliculus in the cat  

E-print Network

Visual detection deficits following inactivation of the superior colliculus in the cat MARNIE C Lesion or inactivation of the superior colliculus (SC) of the cat results in an animal that fails movements. We investigated the effects of SC inactivation in the cat in two ways. First, we tested cats

Kilgard, Michael P.

437

Experiencias, Sentido y Significado de la Consejeria en Justicia Social a Nivel Universitario: Estudio de Caso Cualitativo Mediante Tres Narrativas De Consejeros Profesionales en Educacion Superior  

ERIC Educational Resources Information Center

The purpose of the study was to understand and profoundly describe the nature of social justice practice, as is comes up from the experience of three professional counselors whose working settings are the academic arena. Detailed descriptions are presented concerning the meanings and sense of counseling for social justice, as the interviews…

Santiago Tosado, Virginia

2012-01-01

438

Tympanometric findings in superior semicircular canal dehiscence syndrome.  

PubMed

The diagnostic role of audio-impedancemetry in superior semicircular canal dehiscence (SSCD) disease is well known. In particular, since the first reports, the presence of evoked acoustic reflexes has represented a determining instrumental exhibit in differential diagnosis with other middle ear pathologies that are responsible for a mild-low frequencies air-bone gap (ABG). Even though high resolution computed tomography (HRCT) completed by parasagittal reformatted images still represents the diagnostic gold standard, several instrumental tests can support a suspect of labyrinthine capsule dehiscence when "suggestive" symptoms occur. Objective and subjective audiometry often represents the starting point of the diagnostic course aimed at investigating the cause responsible for the so-called "intra-labyrinthine conductive hearing loss". The purpose of this study is to evaluate the role of tympanometry, in particular of the inter-aural asymmetry ratio in peak compliance as a function of different mild-low frequencies ABG on the affected side, in the diagnostic work-up in patients with unilateral SSCD. The working hypothesis is that an increase in admittance of the "inner-middle ear" conduction system due to a "third mobile window" could be detected by tympanometry. A retrospective review of the clinical records of 45 patients with unilateral dehiscence selected from a pool of 140 subjects diagnosed with SSCD at our institution from 2003 to 2011 was performed. Values of ABG amplitude on the dehiscent side and tympanometric measurements of both ears were collected for each patient in the study group (n = 45). An asymmetry between tympanometric peak compliance of the involved side and that of the contralateral side was investigated by calculating the inter-aural difference and the asymmetry ratio of compliance at the eardrum. A statistically significant correlation (p = 0.015 by Fisher's test) between an asymmetry ratio ? 14% in favour of the pathologic ear and an ABG > 20 dB nHL on the same side was found. When "evocative" symptoms of SSCD associated with important ABG occur, the inter-aural difference in tympanometric peak compliance at the eardrum in favour of the "suspected" side could suggest an intra-labyrinthine origin for the asymmetry. Tympanometry would thus prove to be a useful instrument in clinical-instrumental diagnosis of SSCD in detection of cases associated with alterations of inner ear impedance. PMID:23853402

Castellucci, A; Brandolini, C; Piras, G; Modugno, G C

2013-04-01

439

Lateralization for dynamic facial expressions in human superior temporal sulcus.  

PubMed

Most face processing studies in humans show stronger activation in the right compared to the left hemisphere. Evidence is largely based on studies with static stimuli focusing on the fusiform face area (FFA). Hence, the pattern of lateralization for dynamic faces is less clear. Furthermore, it is unclear whether this property is common to human and non-human primates due to predisposing processing strategies in the right hemisphere or that alternatively left sided specialization for language in humans could be the driving force behind this phenomenon. We aimed to address both issues by studying lateralization for dynamic facial expressions in monkeys and humans. Therefore, we conducted an event-related fMRI experiment in three macaques and twenty right handed humans. We presented human and monkey dynamic facial expressions (chewing and fear) as well as scrambled versions to both species. We studied lateralization in independently defined face-responsive and face-selective regions by calculating a weighted lateralization index (LIwm) using a bootstrapping method. In order to examine if lateralization in humans is related to language, we performed a separate fMRI experiment in ten human volunteers including a 'speech' expression (one syllable non-word) and its scrambled version. Both within face-responsive and selective regions, we found consistent lateralization for dynamic faces (chewing and fear) versus scrambled versions in the right human posterior superior temporal sulcus (pSTS), but not in FFA nor in ventral temporal cortex. Conversely, in monkeys no consistent pattern of lateralization for dynamic facial expressions was observed. Finally, LIwms based on the contrast between different types of dynamic facial expressions (relative to scrambled versions) revealed left-sided lateralization in human pSTS for speech-related expressions compared to chewing and emotional expressions. To conclude, we found consistent laterality effects in human posterior STS but not in visual cortex of monkeys. Based on our results, it is tempting to speculate that lateralization for dynamic face processing in humans may be driven by left-hemispheric language specialization which may not have been present yet in the common ancestor of human and macaque monkeys. PMID:25463458

De Winter, François-Laurent; Zhu, Qi; Van den Stock, Jan; Nelissen, Koen; Peeters, Ronald; de Gelder, Beatrice; Vanduffel, Wim; Vandenbulcke, Mathieu

2015-02-01

440

Superior semicircular canal dehiscence in East Asian women with osteoporosis  

PubMed Central

Background Superior semicircular canal dehiscence (SSCD) may cause Tullio phenomenon (sound-induced vertigo) or Hennebert sign (valsalva-induced vertigo) due to the absence of bone overlying the SSC. We document a case series of elderly East Asian women with atypical SSCD symptoms, radiologically confirmed dehiscence and concurrent osteoporosis. Methods A retrospective record review was performed on patients with dizziness, vertigo, and/or imbalance from a neurology clinic in a community health center serving the East Asian population in Boston. SSCD was confirmed by multi-detector, high-resolution CT of the temporal bone (with Pöschl and Stenvers reformations) and osteoporosis was documented by bone mineral density (BMD) scans. Results Of the 496 patients seen in the neurology clinic of a community health center from 2008 to 2010, 76 (17.3%) had symptoms of dizziness, vertigo, and/or imbalance. Five (6.6%) had confirmed SSCD by multi-detector, high-resolution CT of the temporal bone with longitudinal areas of dehiscence along the long axis of SSC, ranging from 0.4 to 3.0?mm, as seen on the Pöschl view. Two of the 5 patients experienced motion-induced vertigo, two fell due to disequilibrium, and one had chronic dizziness. None had a history of head trauma, otologic surgery, or active intracerebral disease. On neurological examination, two patients had inducible vertigo on Dix-Hallpike maneuver and none experienced cerebellar deficit, Tullio phenomenon, or Hennebert sign. All had documented osteoporosis or osteopenia by BMD scans. Three of them had definite osteoporosis, with T-scores?

2012-01-01

441

The superior longitudinal fasciculus in typically developing children and adolescents: diffusion tensor imaging and neuropsychological correlates.  

PubMed

The relationship between superior longitudinal fasciculus microstructural integrity and neuropsychological functions were examined in 49 healthy children (range: 5-17 years) using diffusion tensor imaging. Seven major cognitive domains (intelligence, fine-motor, attention, language, visual-spatial, memory, executive function) were assessed. Data analyses used correlational methods. After adjusting for age and gender, fractional anisotropy and axial diffusivity values in the superior longitudinal fasciculus were positively correlated with executive functions of set shifting, whereas left superior longitudinal fasciculus fractional anisotropy values correlated with attention and language. Apparent diffusion coefficient values in the left superior longitudinal fasciculus negatively correlated with inhibitory control. In the left arcuate fasciculus, fractional anisotropy correlated with IQ and attention, whereas radial diffusivity values negatively correlated with IQ, fine-motor skills, and expressive language. Findings from this study provide an examination of the relationship between superior longitudinal fasciculus integrity and children's neuropsychological abilities that can be useful in monitoring pediatric neurologic diseases. PMID:24556549

Urger, Sacide E; De Bellis, Michael D; Hooper, Stephen R; Woolley, Donald P; Chen, Steven D; Provenzale, James

2015-01-01

442

Forecasting Lake Effect Snow in Lake Superior region  

NSDL National Science Digital Library

This exercise is designed to present the realistic problems of forecasting weather. Lake effect snows are hard to forecast because they depend on information that isn't part of the regular set of information and involve some pretty specific things that integrate the location of the site with surrounding environment. Even places close by can get totally different forecasts. When you have a regional forecast, it doesn't really address lake effect snows, unless the forecaster really focuses. So the exercise aims to show the value of broad critical thinking in meteorology, and it is very dramatic, because the difference between 36 inches and whiteout and clear blue sky is undeniable. The exercise comes when students are 8 weeks into the class. The class is an AMS based class, which has already been described well in this workshop by Julie Snow from Slippery Rock. Our class is given in the fall semester and lake effect snow starts in October and is quite an issue in forecasts until April. The skills of a forecaster are tested, and you cannot use forecasts from nearby areas reliably. Finally, we live in a fantastic snow belt, so lake effect snow happens a lot. In a good year we get over 300 inches of snow, mostly at times that places nearby do not. You can drive to Houghton in the bright sun and be met by a wall of very active blizzard just a few miles out of town. There are some excellent tutorials available from COMET, and outreach of the National Weather Service. I use one done by Greg Byrd, which is available online or in a power point format. There are a number of things that must be learned before forecasting. These include some fluid dynamics of plumes, latent heat, remote sensing, upper air mapping, and the use of models. We cannot cover all them completely. I try to introduce all these things and give people entry points into the juicy parts of these topics, but do not expect students to understand completely. One thing you can spend a long time on are the satellite images. Here is one, just to whet your interest: http://serc.carleton.edu/details/images/13586.html I have the students make a list of the critical parameters they think might be needed for a successful lake effect forecast. This is a challenge to prepare, but the idea is to include things that are even marginally useful and to collect data to see what is most important. We get a list of parameters like this: 850 mb wind direction 850 mb temperature Lake Superior surface temperature fetch length opposing bay? Inversion layer height topographic lift factor wind shear evidence upstream lake upstream moisture factor snow/ice cover issues This list is pretty good, but deliberately not complete, and we encourage students to add other things they think might be important. The next step is to find where you can get this information. I have web data sources for most (see below), and some of them are interrelated. You can do this exercise for any site around Lake Superior or probably many other lakes as well. For specific sites, the fetch length, upstream lake and opposing bay information are obtainable directly from the wind direction if you have a good map (Google Earth). So a spreadsheet for parameters related to wind direction can be prepared in advance and these parameters can be immediately available from the wind direction. Nonetheless the issue of sources for all this stuff must be addressed in an effort that spans several hours. The use of models is needed to look into the future where possible. Once students know what they are looking for and how to find it, the exercise starts its data collection. Every day or every 6 or 12 hours beginning when conditions get close to "LES favorable" students collect information on these LES predictors. They also make LES forecasts for each period and include that information in the spreadsheet. The next day the real snowfall data is added to the spreadsheet, and this can be used as validation data for the forecast. This data collection needs to be done for several weeks (November and December in my case, usually a good

Bill Rose

443

An unusual anatomical variation of the superior turbinate: a case report  

PubMed Central

Introduction The only anatomical variation of the superior turbinate defined in the literature is concha bullosa. Determination of anatomical variations of the intranasal structures is important to perform safe endoscopic sinus surgery and avoid complications. Case presentation We report a case of an unusual anatomical variation of the superior turbinate in a 55-year-old Turkish man with nasal obstruction and headache. Conclusions Anatomical variations of superior turbinate are very rare. Variations of intranasal structures can easily be detected with coronal plane paranasal sinus computed tomography. PMID:24912569

2014-01-01

444

Do signs of natural plugging of superior semicircular canal dehiscence exist?  

PubMed

Our experience with 102 patients having superior semicircular canal dehiscence confirm that the clinical manifestations of the disease are very diverse; we also identified 3 patients who showed Meniere-like symptoms. Clinical examination during an acute vertigo attack of a patient with Meniere disease for several years and whom we subsequently diagnosed as having large superior semicircular canal dehiscence on the affected side allowed us to hypothesize that a natural plugging of the superior semicircular canal by the overhanging dura mater could be responsible for the recurrence of symptoms. Clinical and instrumental data were very similar to those recorded in 7 of 9 patients immediately after surgical plugging. The aim of the study was to understand which semiological and instrumental elements could be clinically useful, first in distinguishing Meniere disease from superior semicircular canal dehiscence and, secondly, in understanding if signs of natural plugging are present. PMID:21840625

Brandolini, Cristina; Modugno, Giovanni Carlo

2012-01-01

445

Sunrise over Lake Superior. NRRI receives U.S. EPA funding for Great Lakes  

E-print Network

Sunrise over Lake Superior. NRRI receives U.S. EPA funding for Great Lakes Restoration Initiative research. Autumn 2010 From the Director Restoring the Great Lakes Protecting plants Future environmental

Netoff, Theoden

446

DYNAMICS OF NUTRIENTS AND HYDROLOGY IN A LAKE SUPERIOR COASTAL WETLAND  

EPA Science Inventory

Coastal wetlands are hydrologically complex ecosystems situated at the interface of upland catchments and oligotrophic Lake Superior. Little is known about nutrient dynamics within coastal wetlands or their role in modifying or contributing to nutrient fluxes from watersheds to ...

447

75 FR 63086 - Drawbridge Operation Regulations; Duluth Ship Canal (Duluth-Superior Harbor).  

Federal Register 2010, 2011, 2012, 2013

...Drawbridge Operation Regulations; Duluth Ship Canal (Duluth- Superior Harbor). AGENCY...regulation governing the operation of the Duluth Ship Canal Aerial Bridge at Mile 0.1 over the Duluth Ship Canal, at Duluth, MN, for scheduled...

2010-10-14

448

DETECTING LEVELS OF SUSTAINABLE LAND-USE IN LAKE SUPERIOR WATERSHEDS USING STREAM INVERTEBRATE COMMUNITIES  

EPA Science Inventory

We have been investigating the relationship between watershed land-use and stream ecosystem "health" within 48 western Lake Superior watersheds, trying to identify sustainable land-use levels. Aquatic invertebrates, often useful in evaluating stream condition, were collected from...

449

HYDROMORPHIC DETERMINANTS OF AQUATIC HABITAT VARIABILITY IN LAKE SUPERIOR COASTAL WETLANDS  

EPA Science Inventory

This manuscript evaluates patterns in water quality, water movement, substrate, and vegetation in 10 Lake Superior coastal wetlands in light of wetland hydrology and morphology. Water quality, substrate, and vegetation structure are important aspects of habitat for fishes that u...

450

Neuroscience Letters 405 (2006) 164167 Superior voice timbre processing in musicians  

E-print Network

Neuroscience Letters 405 (2006) 164­167 Superior voice timbre processing in musicians Jean the ability to identify one instrument or voice" [7] has been used often in the psychoacoustic literature. We