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1

Superior Vena Cava Bypass  

PubMed Central

A case of superior vena cava obstruction due to carcinoma of unknown origin is reported. A superior vena cava bypass with polytetrafluoroethylene was performed by suturing the prosthesis to the left innominate vein and the right atrium, respectively. Long-term satisfactory results were achieved. Images PMID:15227139

Trainini, Jorge Carlos; Auricchio, Renato; Del Bagno, Horacio Augusto; Federico, Vicente; Acrich, Mario Willie; Osorio, Julio Nestor

1983-01-01

2

Superior vena cava gunshot wound: successful management.  

PubMed

Superior vena cava gunshot wounds are rare and usually associated with high mortality before patients reach the hospital. We present an exceptional case with a 16 hour preoperative delay and a final recovery. PMID:8941700

Jancovici, R; Dubrez, J; Lang-Lazdunski, L; Brinquin, L; Pons, F

1996-10-01

3

Migration of superior vena cava stent  

PubMed Central

There has been a recent increase in the use of endovascular prostheses resulting in complex surgical and interventional complications not previously recognised. We report a case of Superior vena cava stenosis treated with a wallstent which migrated to the right atrium, necessitating a combined radiological and surgical approach to retrieve it. PMID:18331639

Bagul, Nitin B; Moth, Phillipa; Menon, Narayan J; Myint, Fiona; Hamilton, George

2008-01-01

4

Unique Venocaval Anomalies: Case of Duplicate Superior Vena Cava and Interrupted Inferior Vena Cava  

PubMed Central

Venocaval anomalies are uncommon in the general population and often go unrecognized, but physicians should be aware of their significance. Duplicate superior vena cava should be identified during cardiac imaging, surgery, and catheter insertions. While interrupted inferior vena cava can predispose to thrombus formation, they protect against pulmonary embolism from lower extremity deep vein thrombosis. We describe a unique case of a patient in which combined superior vena cava and inferior vena cava anomalies were found incidentally. This is the first reported case of a duplicate superior vena cava and interrupted inferior vena cava in a single patient in English literature. This article also provides a literature review on the topic. PMID:24967010

Hagans, Iris; Markelov, Alexey; Makadia, Manthan

2014-01-01

5

Edema facial en síndrome de vena cava superior Facial Edema in Superior Vena Cava Syndrome  

Microsoft Academic Search

Summary We report two cases of superior vena cava syndrome (SVCS). The first symptom was facial edema. The etiology of the first case was a thymic neuroendocrine carcinoma. The second case was caused by a central endovenous catheter for chemoterapy, inducing trombosis in the rigth jugular vein. We reviewed the etiology of facial edema including the SVCS. We emphasize the

Manuela Yuste Chaves; Juan Carlos Santos Durán; Juan Sánchez Estella

6

Compression of the superior vena cava by a mediastinal lipoma.  

PubMed

Lipomas are rarely found in the mediastinum. Although they may reach large proportions, they rarely compress vascular structures. We present a case in which a lipoma produced superior vena cava syndrome. Urgent surgical decompression was required. PMID:11093417

Del Campo, C; Mpougas, P P

2000-01-01

7

Occlusion of persistent left superior vena cava to unroofed coronary sinus using vena cava filter and coils.  

PubMed Central

A 48 year old female with complex cyanotic heart disease and pulmonary hypertension was partly cyanosed because of a persistent left superior vena cava draining into an unroofed coronary sinus. The left superior vena cava, which measured 22 mm in diameter, was successfully occluded with a Günther Tulip Vena Cava Mreye Filter which acted as a barrier for embolisation coils. Images PMID:9227308

Heng, J. T.; De Giovanni, J. V.

1997-01-01

8

Bilateral superior vena cava with right superior vena cava draining into left atrium  

PubMed Central

Anomalies of systemic venous return are extremely heterogeneous congenital malformations with variable ranges from completely normal physiology to severe forms of right to left shunting requiring surgical treatment. Anomalous drainage of a right-sided superior vena cava (SVC) to the left atrium (LA) is one of the rarest variants of systemic venous return anomalies, characterized by right-to-left shunt physiology and cyanosis. Here we report a 2 years old girl presented with cyanosis which was observed shortly after birth by her parents but not further investigated. She is otherwise active girl and with normal growth and development. Her clinical examination was unremarkable apart from mild clubbing of the fingers and low oxygen saturation of 88–90% in room air. Her ECG and chest X-ray were unremarkable. Echocardiography showed bilateral SVC connected by a small innominate vein. The right SVC drains directly into the LA while the left SVC drains into the right atrium (RA) via a dilated coronary sinus. There is a small superior sinus venosus type atrial septum defect (ASD) with left to right shunt. Also, there is partial anomalous pulmonary venous return with right upper and right middle pulmonary veins draining directly into the right SVC, which is connected to LA. The right lower pulmonary vein and left pulmonary veins drain directly to LA. The rest of her echocardiography demonstrated normal heart structures and function. This patient was referred for surgical correction, including baffling of the right SVC to the RA and closure of the ASD. We describe this case to highlight the importance of recognizing this rare anomalous systemic venous connection as one of the very rare causes of cyanosis in the pediatric age group as well as at older age. PMID:25870506

Alghamdi, Mohammed H.; Elfaki, Wafa; Al-Habshan, Fahad; Aljarallah, Abdullah S.

2014-01-01

9

Stereotactic body radiotherapy for superior vena cava syndrome  

PubMed Central

Superior vena cava syndrome (SVCS) is characterized by a spectrum of clinical findings that result from the occlusion of the superior vena cava (SVC), usually caused by extracaval compression of the SVC by either a bronchogenic tumor or an enlarged mediastinal lymph node. Most efforts at treatment for SVCS are palliative, and long-term survival for malignancy-related SVCS is very low. Therefore, radiotherapy treatment is usually delivered with palliative intent utilizing hypofractionated regimens. The use of high dose per fraction may result in more rapid and more durable responses to treatment. Similarly, the high dose per fraction utilized in stereotactic body radiotherapy (SBRT) has been proven highly efficacious in treating early stage non-small cell lung cancer (NSCLC). Here we report the first reported case of a patient with SVCS from NSCLC successfully treated with SBRT to alleviate SVCS. PMID:24416550

McKenzie, Joshua T.; McTyre, Emory; Kunaprayoon, Dan; Redmond, Kevin P.

2013-01-01

10

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

11

Lipomatous hypertrophy presenting as superior vena cava syndrome.  

PubMed

We report a rare case of invasive lipomatous hypertrophy of the interatrial septum presenting as superior vena cava syndrome requiring surgical resection. Lipomatous hypertrophy of the interatrial septum is a common incidental finding and is thought to be a relatively benign condition. Classically, its appearance on cardiac computed tomography is primarily fatty with low attenuation, sharp margins and minimal enhancement, involving the interatrial septum with relative sparing of the fossa ovalis. In masses of unclear etiology or in rare, extensive cases resulting in cavity obstruction, such as ours, cardiac computed tomography provides complementary information to define tumor extent and characterize classic mass features facilitating diagnosis and management. PMID:24939076

Cheezum, Michael K; Jezior, Matthew R; Carbonaro, Salvatore; Villines, Todd C

2014-01-01

12

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. PMID:25664191

Jaffer, Faraz; Chandiramani, Vijay

2015-01-01

13

Cardioverter defibrillator implantation in a patient with absent right superior vena cava  

PubMed Central

Left-sided superior vena cava (LSVC) is the most common venous thoracic anomaly. Absence of the right superior vena cava (RSVC) on the other hand is very rare. We describe a patient with this abnormal venous system, who was admitted to our centre for an implantation of a cardioverter defibrillator (ICD). ImagesFigure 2Figure 3 PMID:25696649

Beukema, R.J.; Elvan, A.; Beukema, W.P.; Misier, A.R. Ramdat; Delnoy, P.P.H.M.; Luttikhuis, H.A. Oude; Hoorntje, J.C.A.

2006-01-01

14

Minimally invasive thoracoscopic ligation of a persistent left superior vena cava.  

PubMed

Persistent left superior vena cava draining into the left atrium is a rare congenital venous anomaly, which remains asymptomatic and therefore undetected in most cases. Paradoxical embolization caused by right-to-left shunt is a severe complication and requires surgical correction. We describe the first thoracoscopic approach for ligation of a persistent left superior vena cava even though our patient had severe kyphoscoliosis because of Klippel-Feil syndrome. PMID:25538252

Goebel, Nora; von Loewensprung, Henning; Beyer, Martin; Franke, Ulrich F W

2015-04-01

15

Mediastinal germ cell tumour causing superior vena cava tumour thrombosis.  

PubMed

We report a rare case of a 35-year-old man who presented with a 1-week history of retrosternal chest pain of moderate intensity. A positron emission tomography CT (PET-CT) showed a large fluorodeoxy-glucose (FDG)-avid heterogeneously enhancing necrotic mass in the anterosuperior mediastinum with a focal FDG-avid thrombosis of the superior vena cava (SVC) suggestive of tumour thrombus and vascular invasion. ?-Fetoprotein levels were raised (5690?IU/L). Image guided biopsy of the mediastinal mass was suggestive of non-seminomatous germ cell tumour (NSGCT). The patient received four cycles of BEP (bleomycin, etoposide and cisplatin) along with therapeutic anticoagulation with low-molecular-weight heparin. Follow-up whole body PET-CT revealed complete resolution of mediastinal mass and SVC tumour thrombosis. The documentation of FDG-PET-avid tumour thrombus resolving with chemotherapy supports the concept of circulating tumour cells being important not only in common solid tumours such as breast and colon cancer but also in relatively less common tumours such as NSGCT. The detection of circulating tumour cells could help deploy aggressive regimens upfront. PMID:25809431

Karanth, Suman S; Vaid, Ashok K; Batra, Sandeep; Sharma, Devender

2015-01-01

16

Persistent left superior vena cava with an absent right superior vena cava in a 72-year-old male with multivessel coronary artery disease.  

PubMed

Congenital anomalies of systemic veins are usually asymptomatic and found incidentally during ultrasonography, computed tomography (CT) or magnetic resonance examinations performed for other clinical indications. Persistent left superior vena cava (PLSVC) with absent right superior vena cava (RSVC) is the congenital aberration in the thoracic venous system which occurs in only 0.09%to 0.13% of patients who have congenital heart defects. In this paper, we present the extremely rare case of a 72-year-old male with PLSVC associated with an absence of RSVC, referred for coronary CT angiography. Multidetector CT angiography is a powerful tool for the detection of venous anomalies, which is essential before invasive procedures such as the implantation of pacemakers. PMID:24068691

Szymczyk, K; Polguj, M; Szymczyk, E; Majos, A; Grzelak, P; Stefa?czyk, L

2013-08-01

17

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

18

Double superior vena cava on fistulogram: A case report and discussion  

PubMed Central

Patient: Female, 50 Final Diagnosis: Double superior vena cava Symptoms: — Medication: — Clinical Procedure: — Specialty: Nephrology Objective: Anatomical anomaly/variation Background: Superior vena cava anomalies are caused by variations in the development of the embryonic thoracic venous system. Duplication of the superior vena cava is a rare anomaly with an incidence in the general population of 0.3%. The majority of cases are asymptomatic and diagnosed incidentally by imaging done for another reason. Case Report: A fifty year old female patient presented to our care with a history of end stage renal disease that has been recently started on dialysis. Procedures performed included a fistulogram, PermaCath placement and angiogram of internal jugular vein. Angiogram was done and showed that the patient has a good sized cephalic vein which is wide open and mild to moderate stenosis at the subclavian area which proved to be a dual superior vena cava. Conclusions: Double SVC is a rare congenital anomaly. The literature available on this congenital anomaly is sparse. The majority of cases are diagnosed incidentally on imaging for other reasons, which can alert the physician of other congenital abnormalities that will need further work up. However, these venous anomalies should be recognized, as they can have significant clinical implications, especially during central venous catheter placement, radiofrequency ablation, pacemaker insertion or coronary artery bypass graft. PMID:24130918

Cooper, Chad J.; Gerges, Anwar Soliman; Anekwe, Emmanuel; Hernandez, German T.

2013-01-01

19

Acute superior vena cava syndrome after insertion of implantable cardioverter defibrillator  

Microsoft Academic Search

We describe a rare case of superior vena cava syndrome that occurred a few hours after insertion of an implantable cardioverter\\u000a defibrillator through the right subclavian vein in a patient with previous dual chamber DDD pacemaker. The patient was successfully\\u000a treated with anticoagulant therapy showing a fast clinical and instrumental improvement.

Andrea Rossi; Massimo Baravelli; Paolo Cattaneo; Melania Romano; Giovanni Mariscalco; Daniela Imperiale; Maria Cristina Rossi; Anna Picozzi; Paola Dario; Claudio Anza; Annibale Sandro Montenero

2008-01-01

20

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

21

Pacemaker implantation in patients with persistent left superior vena cava.  

PubMed

Implantation of a permanent pacemaker system is most commonly performed by puncturing the left subclavian vein and introducing the pacemaker lead(s) through the superior caval vein to the right atrium and/or ventricle. Occasionally, a persistent left superior caval vein is encountered peroperatively, complicating the procedure. This article describes three such patients and provides a review of the literature regarding one of the most common anomalies of the thoracic vessels. PMID:15168065

Lappegård, Knut Tore; Prytz, Jan F; Haug, Bjørn

2004-05-01

22

Treatment of Superior Vena Cava (SVC) Syndrome and Inferior Vena Cava (IVC) Thrombosis in a Patient with Colorectal Cancer: Combination of SVC Stenting and IVC Filter Placement to Palliate Symptoms and Pave the Way for Port Implantation  

SciTech Connect

Thrombosis of the inferior vena cava is a life-threatening complication in cancer patients leading to pulmonary embolism. These patients can also be affected by superior vena cava syndrome causing dyspnea followed by trunk or extremity swelling. We report the case of a 61-year-old female suffering from an extended colorectal tumor who became affected by both of the mentioned complications. Due to thrombus formation within the right vena jugularis interna, thrombosis of the inferior vena cava, and superior vena cava syndrome, a combined interventional procedure via a left jugular access with stenting of the superior vena cava and filter placement into the inferior vena cava was performed As a consequence, relief of the patient's symptoms, prevention of pulmonary embolism, and paving of the way for further venous chemotherapy were achieved.

Sauter, Alexander; Triller, Juergen; Schmidt, Felix; Kickuth, Ralph, E-mail: ralph.kickuth@insel.c [Inselspital, University of Berne, Department of Diagnostic, Interventional and Pediatric Radiology (Switzerland)

2008-07-15

23

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

24

Percutaneous endovascular Y-stenting of a malignant superior vena cava and innominate vein obstruction.  

PubMed

Superior vena cava syndrome (SVCS) is considered one of the telltale signs of a terminal malignant process. We describe a successful endovascular desobliteration of a subtotal occluded SVC and the left innominate vein using a Y-stent technique in a 46-year-old female with a mediastinal nodal metastasis of a relapsing renal cell carcinoma. Complete clinical improvement in the symptoms within the first 24 hours of the procedure and no complication were observed. This report describes endovascular stenting of the SVC as a palliation therapy to overcome the severe clinical symptoms of SVCS besides surgical or chemotherapy in mediastinal malignancy masses. PMID:24122722

Cordial, Reginald; Moussavian, Mohammed Reza; Corvalan, José; Görtz, Hartmut; Teßarek, Jörg

2014-01-01

25

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

26

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

27

Recurrent cerebral abscess secondary to a persistent left superior vena cava.  

PubMed

Cerebral abscess is a serious neurological condition that is often of unclear etiology. Management is usually medical therapy with or without direct drainage, and when patients have recurrent episodes a structural abnormality should be considered. Persistent left superior vena cava is an uncommon condition in the absence of other forms of congenital heart disease. This venous connection most often enters the right-sided atrium through the coronary sinus but occasionally can connect directly to the left atrium near the wall between the orifice of the left pulmonary veins and left atrial appendage. This later congenital connection results in systemic venous return entering the left atrium directly. Thus allowing unfiltered, lower saturation blood entering the systemic system. This then places the patient at risk for systemic hypoxemia, paradoxical embolic events, and cerebral abscess. In our case report with recurrent cerebral abscess and a persistent left superior vena cava, we demonstrate when to consider this diagnosis, how to make the diagnosis, and a nonsurgical approach to repair the veno-atrial shunt. PMID:23710652

Menachem, Jonathan N; Sundaram, Senthil N; Rhodes, John F

2014-01-01

28

Superior Vena Cava Syndrome and Colon Carcinoma: A Report of a Multifactorial Association  

PubMed Central

Introduction. Superior vena cava (SVC) syndrome results from the obstruction of blood flow through the SVC, having distinct pathophysiological underlying mechanisms. Cancer is associated with an increased risk of thromboembolism that varies according to patient-, tumor-, and treatment-related factors. An individualized clinical approach is important to pursue the accurate diagnosis of the underlying pathology causing thromboembolism in cancer patients. Case Presentation. The authors present a case of a 58-year-old male with an infrequent presentation of an unknown colon carcinoma, who has never had any symptom until he was hospitalized with the diagnosis of superior vena cava syndrome and pulmonary thromboembolism. The patient had an advanced disease by the time of diagnosis and molecular alterations contributing to abnormal hemostasis. He presented venous and arterial thromboembolism and developed disseminated intravascular coagulopathy after surgery, anticoagulant and transfusion therapy, dying 40 days after the hospitalization. Conclusion. The authors discuss thromboembolic disease and tumor metastasis roles in a cancer patient with SVC syndrome. Thromboembolism in a malignancy context is a challenging clinical entity. A multifactorial perspective of the thrombotic disease is warranted to approach thromboembolism risk and stratify patients suitable to receive adequate anticoagulant prophylaxis and targeted therapies, aiming to improve clinical prognosis.

Espírito Santo, Joana; Coutinho, Inês; Pimentel, Ana; Garcia, Rui; Marques dos Santos, Rui

2015-01-01

29

Endovascular Treatment of Malignant Superior Vena Cava Syndrome: Results and Predictive Factors of Clinical Efficacy  

SciTech Connect

To demonstrate the effectiveness of endovascular treatment (EVT) with self-expandable bare stents for malignant superior vena cava syndrome (SVCS) and to analyze predictive factors of EVT efficacy. Retrospective review of the 164 patients with malignant SVCS treated with EVT in our hospital from August 1992 to December 2007 and followed until February 2009. Endovascular treatment includes angioplasty before and after stent placement. We used self-expandable bare stents. We studied results of this treatment and looked for predictive factors of clinical efficacy, recurrence, and complications by statistical analysis. Endovascular treatment was clinically successful in 95% of cases, with an acceptable rate of early mortality (2.4%). Thrombosis of the superior vena cava was the only independent factor for EVT failure. The use of stents over 16 mm in diameter was a predictive factor for complications (P = 0.008). Twenty-one complications (12.8%) occurred during the follow-up period. Relapse occurred in 36 patients (21.9%), with effective restenting in 75% of cases. Recurrence of SVCS was significantly increased in cases of occlusion (P = 0.01), initial associated thrombosis (P = 0.006), or use of steel stents (P = 0.004). Long-term anticoagulant therapy did not influence the risk of recurrence or complications. In malignancy, EVT with self-expandable bare stents is an effective SVCS therapy. These results prompt us to propose treatment with stents earlier in the clinical course of patients with SVCS and to avoid dilatation greater than 16 mm.

Fagedet, Dorothee, E-mail: DFagedet@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de medecine interne, Pole Pluridisciplinaire de Medecine (France)] [CHU de Grenoble, Clinique universitaire de medecine interne, Pole Pluridisciplinaire de Medecine (France); Thony, Frederic, E-mail: FThony@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d'Imagerie (France)] [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d'Imagerie (France); Timsit, Jean-Francois, E-mail: JFTimsit@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de reanimation, Pole Medecine Aiguee Communautaire (France)] [CHU de Grenoble, Clinique universitaire de reanimation, Pole Medecine Aiguee Communautaire (France); Rodiere, Mathieu, E-mail: MRodiere@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d'Imagerie (France)] [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d'Imagerie (France); Monnin-Bares, Valerie, E-mail: v-monnin@chu-montpellier.fr [CHRU Arnaud de Villeneuve, Imagerie Medicale Thoracique Cardiovasculaire (France)] [CHRU Arnaud de Villeneuve, Imagerie Medicale Thoracique Cardiovasculaire (France); Ferretti, Gilbert R., E-mail: GFerretti@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d'Imagerie (France); Vesin, Aurelien; Moro-Sibilot, Denis, E-mail: DMoro.pneumo@chu-grenoble.fr [University Grenoble 1 e Albert Bonniot Institute, Inserm U823 (France)] [University Grenoble 1 e Albert Bonniot Institute, Inserm U823 (France)

2013-02-15

30

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

31

Stenting through a portacath for totally occluded superior vena cava in a case of non-Hodgkin s lymphoma.  

PubMed

Superior vena cava (SVC) syndrome often presents with slowly progressive symptoms worsening over weeks or may cause abrupt symptoms and constitute a true medical emergency. Percutaneous intervention is the treatment of choice. We report a case of SVC stenting in a middle-aged woman with SVC obstruction secondary to portacath insertion for chemotherapy. PMID:12556622

Patel, Tejas M; Shah, Sanjay C; Ranjan, Alok; Malhotra, Hemant; Patel, Rajnikant; Gupta, Anoop K

2003-02-01

32

Compression of the Superior Vena Cava by an Interatrial Septal Lipoma: A Case Report  

PubMed Central

Primary cardiac tumours are rare; their prevalence ranges from 0.0017% to 0.28% in various autopsy series. Cardiac lipomas are well-encapsulated benign tumours typically composed of mature fat cells, and their reported size ranges from 1 to 15?cm. They are usually seen in the left ventricle and the right atrium. Lipomas are true neoplasms, as opposed to lipomatous hypertrophy of the interatrial septum, which is a nonencapsulated hyperplastic accumulation of mature and foetal adipose tissue. Cardiac lipomas occur in patients of all ages, and the frequency of occurrence has been found to be equal in both sexes. Patients are usually asymptomatic, although the manifestation of symptoms depends upon both size and location of the tumour. We present the case of a patient with an interatrial septal lipoma, causing obstruction of the superior vena cava. PMID:23984155

Grech, R.; Mizzi, A.; Grech, S.

2013-01-01

33

Endovascular Management of Chronic Upper Extremity Deep Vein Thrombosis and Superior Vena Cava Syndrome  

PubMed Central

Chronic upper extremity deep vein thrombosis (UEDVT) and superior vena cava syndrome (SVCS) are important and underdiagnosed entities that are associated with significant morbidity, and both are becoming increasingly common due to the use of indwelling catheters and implantable central venous access devices. Currently, as many as 25% of patients with an indwelling catheter are diagnosed with chronic UEDVT or venous stenosis. SVCS is most commonly seen in the setting of malignancy, especially lung cancer and lymphoma. Endovascular management of chronic UEDVT and SVCS is accepted as an important first-line treatment given its high overall success rate and low morbidity as compared with medical and surgical treatments. In this article, the indications for treatment, complications, and success rates of the endovascular management of UEDVT and SVCS are reviewed. Relevant findings on presentation and physical exam as well as various imaging modalities and imaging findings are evaluated. Details of preprocedure evaluation, relevant anatomy, and avoidance of potential complications are discussed. PMID:22379274

Warren, Patrick; Burke, Charles

2011-01-01

34

Slow continuous ultrafiltration in a patient with anomaly of a persistent left superior vena cava.  

PubMed

This paper describes an uncommon case of a patient with anomaly of a persistent left superior vena cava (PLSVC). A 54-year-old man with a history of chronic kidney disease, heart failure, diabetes mellitus and hypertension was admitted to the hospital for worsening dyspnoea. During his hospital stay, heart failure was further deteriorated and he became anuric. Renal replacement therapy was then required. After multiple unsuccessful attempts of right subclavian vein catheterisation, a catheter was placed in the left subclavian vein. Chest X-ray revealed the catheter in the left side of the thorax. Transthoracic cardiac ultrasound with agitated saline and chest MRI confirmed the diagnosis of PLSVC. The patient had nine sessions of slow continuous ultrafiltration. His heart and renal function were gradually improved. Nephrologists and health care professionals must be aware of this uncommon anatomic variant. Unnecessary manipulations can lead to serious complications, such as cardiac arrhythmias, cardiac arrest and venous sinus thrombosis. PMID:22449136

Aperis, Georgios; Paliouras, Christos; Moschos, Nikitas; Tsampikaki, Eirini; Alivanis, Polichronis

2012-09-01

35

Dialysis Catheter-Related Superior Vena Cava Syndrome with Patent Vena Cava: Long Term Efficacy of Unilateral Viatorr Stent-Graft Avoiding Catheter Manipulation  

PubMed Central

Central venous catheters are the most frequent causes of benign central vein stenosis. We report the case of a 79-year-old woman on hemodialysis through a twin catheter in the right internal jugular vein, presenting with superior vena cava (SVC) syndrome with patent SVC. The clinically driven endovascular therapy was conducted to treat the venous syndrome with a unilateral left brachiocephalic stent-graft without manipulation of the well-functioning catheter. The follow-up was uneventful until death 94 months later. PMID:24843241

Galli, Franco; Moramarco, Lorenzo Paolo; Corti, Riccardo; Leati, Giovanni; Fiorina, Ilaria; Maestri, Marcello

2014-01-01

36

Role of cardiac output and the autonomic nervous system in the antinatriuretic response to acute constriction of the thoracic superior vena cava.  

NASA Technical Reports Server (NTRS)

Study of the differential characteristics of hepatic congestion and decreased cardiac output in terms of potential afferent stimuli in the antinatriuretic effect of acute thoracic inferior vena cava (TIVC) constriction. An attempt is made to see if the autonomic nervous system is involved in the antinatriuretic effect of acute TIVC or thoracic superior vena cava constriction.

Schrier, R. W.; Humphreys, M. H.; Ufferman, R. C.

1971-01-01

37

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. PMID:25558346

Kim, Hyerim; Kim, Jin Hee

2014-01-01

38

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

39

An unusual case of infective endocarditis involving a right coronary artery to superior vena cava fistula.  

PubMed

Coronary artery fistulas (CAFs) are rare and mostly congenital anomalous connections between a coronary artery and a cardiac chamber or great vessel. Most CAFs are small, asymptomatic, and found incidentally during cardiac imaging. However, they can lead to serious complications including myocardial infarction, congestive heart failure, arrhythmias, or fistula rupture. CAFs have been associated with infective endocarditis, but to our knowledge, this complication has never been reported involving an isolated CAF to an otherwise anatomically normal great vessel. We report the first case of this complication in a 49-year-old man with a presumed streptococcus vegetation found within an isolated large, tortuous CAF connecting the right coronary artery to the superior vena cava. After completing antibiotic treatment, transcatheter closure of the CAF was performed. Since then, the patient has remained symptom-free. This case demonstrates that CAF closure is feasible following CAF-associated endocarditis, and that closure may represent a viable strategy for reducing risk of recurrent infection. © 2014 Wiley Periodicals, Inc. PMID:25044393

Jariwala, Ujjval; Hasan, Rani K; Thorn, Eric M; Zakaria, Sammy

2015-03-01

40

Partial absence of superior vena cava in an adult patient. Case report and literature review.  

PubMed

Absence of the superior vena cava (SVC) is a rare variety of vascular anomaly. The purpose of this report is to describe the computed tomography (CT) findings of the partial absence of the SVC without persistent left SVC in a patient with no evidence of congenital cardiovascular disease and no prior history of central venous instrumentation. A 77-year-old woman with a history of colon cancer underwent thoracoabdominal CT imaging because of abdominal pain of uncertain cause. No tumor recurrence was observed. A complicated"investigation" confirmed a thymoid cancer surgery back in 1976, which was accompanied by resection of the SVC and the left brachiocephalic vein because of their invasion. Owing to the absence of the SVC and bilateral brachiocephalic veins, caval hypertension developed in the patient, resulting in the dilation of cavo-caval anastomoses. In addition, new anastomoses were opened. The clinical significance and possible embryogenesis of this anomaly are discussed. The extremely rare condition of the partial absence of the SVC appeared with subcutaneous dilated, tortuous collaterals in an asymptomatic adult patient. This anomaly is becoming clinically more relevant with the increasing use of minimally invasive vascular surgery. PMID:23324916

Tarnoki, D L; Tarnoki, A D; Nemeth, K; Bata, P; Berczi, V; Karlinger, K

2013-11-01

41

[Anesthetic management for abdominoperineal resection of the rectum in a patient with superior vena cava syndrome].  

PubMed

Since superior vena cava syndrome (SVCs) causes ntracranial hypertension and edema of the upper respiratory tract close attention should be paid to brain circulatory dysfunction and obstruction of the upper airway. A male patient with SVCs and complete obstruction of the bilateral internal jugular veins was scheduled for abdominoperineal resection of the rectum under general anesthesia To evaluate the brain circuation, we monitored the external jugular venous pressure and regional saturation of oxygen (rSO) by INVOS® in the cerebral frontal cortex. If the external ugular venous pressure would rise above 20 mmHg, we planned to change the horizontal supine position to a head up position and then remove blood from the external jugular vein. Fortunately, since the external jugular venous pressure was maintained within 20 mmHg, and since no great decreases in rSO2 occurred during surgery, we did not change the patient's position or remove blood from the patient. The surgical procedure was completed uneventfully, and pharyngoarngeal edema was not seen. He did not show any neurological deficits after surgery. From experience of khis patient, we concluded that monitoring of external cigular venous pressure and rSO2 is useful for anesthetic management in patints with SVCs. PMID:25693351

Yoshiyama, Yuki; Kawamata, Tomoyuki; Sugiyama, Daisuke; Kawamata, Mikito

2014-10-01

42

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

43

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

44

Superior Vena Cava Echocardiography as a Screening Tool to Predict Cardiovascular Implantable Electronic Device Lead Fibrosis  

PubMed Central

Background Currently there is no noninvasive imaging modality used to risk stratify patients requiring lead extractions. We report the novel use of superior vena cava (SVC) echocardiography to identify lead fibrosis and complex cardiac implantable electronic device (CIED) lead extraction. With an aging population and expanding indications for cardiac device implantation, the ability to deal with the complications associated with chronically implanted device has also increased. Methods This was a retrospective analysis of Doppler echocardiography recorded in our outpatient Electrophysiology/Device Clinic office over 6 months. Images from 109 consecutive patients were reviewed. Results 62% (68/109) did not have a CIED and 38% (41/109) had a CIED. In patients without a CIED, 6% (4/68) displayed turbulent color flow by Doppler in the SVC, while 22% (9/41) of patients with a CIED displayed turbulent flow. Fisher's exact test found a statistically significant difference between the two groups (p value < 0.05). The CIED group was subdivided into 2 groups based on device implant duration (< 2 years vs. ? 2 years). Of the CIED implanted for ? 2 years, 27% (9/33) had turbulent flow in the SVC by Doppler, while no patients (0/8) with implant durations < 2 years demonstrated turbulent flow. Nine patients underwent subsequent lead extraction. A turbulent color pattern successfully identified all 3 patients that had significant fibrosis in the SVC found during extraction. Conclusion Our data suggests that assessing turbulent flow using color Doppler in the SVC may be a valuable noninvasive screening tool prior to lead extraction in predicting complex procedures.

Yakish, S. Jeffrey; Narula, Arvin; Foley, Robert; Kutalek, Steven

2015-01-01

45

Anaplastic Thyroid Carcinoma (ATC) with Superior Vena Cava (SVC) Syndrome, Cardiac Tamponade and Pleural Effusion: An Unusual Clinical Presentation  

PubMed Central

Superior vena cava (SVC) syndrome and cardiac tamponade are potentially life-threatening conditions that are not uncommon in the oncological setting but their occurrence together in a patient is infrequent. Herein, we present a case of 50-year-old male who presented with SVC syndrome and pleural effusion; developed recurrent cardiac tamponade in the hospital. Fine needle aspiration cytology (FNAC) of left supraclavicular lymph node which appeared during hospital stay revealed high grade carcinoma and diagnosis of anaplastic thyroid carcinoma was established by FNAC of thyroid nodule. Despite rarity, clinicians must be aware of such presentation of thyroid malignancy.

Nayak, Hemant Kumar; Daga, Mradul Kumar; Jain, Shyama; Kumar, Mukesh

2015-01-01

46

Surgical repair of an unusual type of supra-cardiac total anomalous pulmonary venous connection to the superior vena cava.  

PubMed

Anomalies of the pulmonary venous drainage vary widely in their anatomic spectrum and clinical presentation. We describe an unusual case of supra-cardiac total anomalous pulmonary venous connection (TAPVC), where the pulmonary veins drained directly in the posterior aspect of proximal right superior vena cava (SVC) through separate ostia. The veins were re-routed with a patch to the left atrium via the secundum atrial septal defect (ASD). The continuity between distal SVC and right atrium was re-established by re-implanting the SVC to the right atrial appendage (Warden Procedure). PMID:22497294

Perri, Gianluigi; Filippelli, Sergio; Kirk, Richard; Hasan, Asif; Griselli, Massimo

2012-05-01

47

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

48

Endovascular Stenting for Left Subclavian Venous Stenosis for a Hemodialysis Patient with a Persistent Left Superior Vena Cava  

PubMed Central

A persistent left superior vena cava (PLSVC) is the most common thoracic venous anomaly, and we should be aware of its existence. We encountered a case of significant left arm swelling due to recurrent left subclavian venous stenosis in a hemodialysis patient with a PLSVC. Endovascular stent placement was performed safely and effectively for the stenosis employing the pull-through technique, in which a guidewire was passed from the left internal jugular vein to the access vein. On the following day, left arm swelling had improved. 3 months after stent placement the left arm swelling has not recurred. PMID:23555493

Matsumoto, Tomohiro; Yamagam, Takuji; Morishita, Hiroyuki; Asai, Shunsuke; Sato, Osamu; Nakanouchi, Tsuneyuki; Nishimura, Tsunehiko

2012-01-01

49

Complete resection of undifferentiated cardiac sarcoma and reconstruction of the atria and the superior vena cava: case report  

PubMed Central

Primary cardiac tumors are rare with an incidence ranging from 0.001% to 0.03% in autopsy series. The prognosis of cardiac sarcomas remains poor because it proliferates rapidly and distant metastases are often found at diagnosis. A 47-year-old male complained of persistent cough. The chest roentgenogram was normal. Subsequent computed tomography revealed a mass in the right atrium. Echocardiography and magnetic resonance imaging confirmed also a right atrial mass (34 x 35 mm) infiltrating the atrial septum. The tumor was completely resected en bloc, including the anterior and lateral right atrial walls, the left atrial dome, and a large segment of the superior vena cava, and reconstructed the atria and superior vena cava with bovine pericardium. The tumor was histologically and immunohistochemically diagnosed as undifferentiated pleomorphic sarcoma. This type of cardiac sarcoma is very rare and usually found in the left atrium. Twenty-seven months after surgery, the patient is doing well without metastasis or local tumor recurrence. PMID:23013671

2012-01-01

50

Transcatheter Treatment of Patent Foramen Ovale Combined with Abnormal Drainage of Left Superior Vena Cava to Left Upper Pulmonary Vein  

PubMed Central

Patent foramen ovale (PFO) has been known to be the cause of transient ischemic attacks or stroke, and transcatheter device closure has been the treatment of choice for these defects. Combined defect of abnormal drainage of left superior vena cava (LSVC) to left superior pulmonary vein (LSPV) in PFO patients is an uncommon combination, and both can act as a pathway for paradoxical embolism. We report a successful closure of PFO, using Amplatzer® PFO occluder (St. Jude Medical, St. Paul, MN, USA) and persistent LSVC connected to LSPV using an Amplatzer® Vascular Plug II (St. Jude Medical, St. Paul, MN, USA). Because this combined anomaly of PFO and persistent LSVC can be treated by a single transcatheter intervention, if clinically suspected, a complete evaluation for this anomaly should be considered. PMID:23560142

Kim, Do Hoon; Park, Su-Jin; Jung, Jo Won; Kim, Nam Kyun

2013-01-01

51

Excessive anteriorisation of the superior vena cava associated with an azygos lobe  

Microsoft Academic Search

Summary A wide variety of congenital vascular anomalies of the superior mediastinum exist. Being clinically silent, most of these anomalies are detected incidentally on plain radiographs or CT scans where they could be mistaken for mediastinal masses. Familiarity with these anomalies is very important for correct interpretation and avoidance of confusion. We present a case of a mediastinal mass detected

GG Agrawal; Gandhi; SD Gandhi

1995-01-01

52

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

53

Anatomic bifurcated reconstruction of chronic bilateral innominate-superior vena cava occlusion using the Y-stenting technique.  

PubMed

This article presents the case of a 42-year-old man who presented with superior vena cava (SVC) syndrome due to fibrosing mediastinitis with multiple failed attempts at recanalization. We initially treated him with unilateral sharp needle recanalization of the right innominate vein into the SVC stump followed by stenting. Although his symptoms improved immediately, they did not completely resolve. Six months later, he returned with worsening symptoms, and venography revealed in-stent restenosis. The patient requested simultaneous treatment on the left side. The right stent was dilated, and a 3-cm-long occlusion of the left innominate vein was recanalized, again using sharp needle technique, homing into the struts of the right-sided stent. Following fenestration of the stent, a second stent was deployed from the left side into the SVC, and the two Y limbs were sequentially dilated to allow a true bifurcation anatomy (figure). The patient had complete resolution of his symptoms and continues to do well 6 months later. PMID:22304866

Amin, Parth; Sharafuddin, Mel J; Laurich, Chad; Nicholson, Rachael M; Sun, Raphael C; Roh, Simon; Kresowik, Timothy F; Sharp, William J

2012-02-01

54

Iatrogenic migration of VenaTech LP IVC filter to superior vena cava secondary to guidewire entrapment: case report and review of literature.  

PubMed

Modern inferior vena cava (IVC) filters are generally safe devices for preventing pulmonary embolus, with fewer complications compared to earlier techniques of caval interruption. Despite continuing improvement in filter designs and insertion methods, complications still occur. The IVC filter complications resulting from iatrogenic causes are rare and include but are not limited to misplacement, filter tilting, incomplete deployment, and filter migration. We recently experienced a problem in which the Vena Tech LP filter (B. Braun, Bethlehem, Pennsylvania) migrated to the superior vena cava (SVC) immediately after successful deployment of the filter in the infrarenal venacava. The root cause analysis of this case revealed that the complication was related to blind pullout of the J-tipped guidewire following deployment of the filter in the IVC. This report highlights the potential risks of using a wire while an IVC filter is in place. PMID:23203598

Almestady, Rajaa; Spain, James; Bayona-Molano, Maria Del Pilar; Wang, Weiping

2013-01-01

55

Hemopericardium After Superior Vena Cava Stenting for Malignant SVC Obstruction: The Importance of Contrast-Enhanced CT in the Assessment of Postprocedural Collapse  

SciTech Connect

We report the complication of hemopericardium following superior vena cava (SVC) stenting with an uncovered Wallstent in a patient with malignant SVC obstruction. The patient collapsed acutely 15 min following stent placement with hypoxemia and hypotension. A CT scan demonstrated a hemopericardium which was successfully treated with a pericardial drain. The possible complications of SVC stenting, including hemopericardium, pulmonary embolism, mediastinal hematoma, and pulmonary edema from increased venous return resulting from improved hemodynamics, ensure a wide differential diagnosis in the post procedural collapsed patient and this case emphasizes the important role of contrast-enhanced CT in the peri-resuscitation assessment of these patients.

Brant, Jonathan; Peebles, Charles [Department of Radiology, Southampton General Hospital, Tremona Road, Southampton SO16 6YD (United Kingdom); Kalra, Paul [Department of Cardiology, Southampton General Hospital, Tremona Road, Southampton SO16 6YD (United Kingdom); Odurny, Allan [Department of Radiology, Southampton General Hospital, Tremona Road, Southampton SO16 6YD (United Kingdom)

2001-09-15

56

Coronary sinus atresia and persistent left superior vena cava with the presence of thrombus complicating implantation of a left ventricular pacing lead.  

PubMed

A 68-year-old male with heart failure and a suitable candidate for resynchronization therapy was referred to our hospital because of a failed coronary sinus (CS) lead implant. Catheterization of the CS initially also failed in our department but a left coronary angiogram revealed atresia of the CS and drainage of the coronary venous system via a persistent left superior vena cava (PLSVC). Implantation of a CS lead through the PLSVC could be accomplished after a selective angiogram, even in spite of the presence of a large thrombus at the junction of PLSVC and CS. PMID:18203736

Stevenhagen, Jeroen; Meijer, Albert; Bracke, Frank A; van Gelder, Berry M

2008-03-01

57

Electrophysiological characteristics of paroxysmal atrial fibrillation originating from superior vena cava: a clinical analysis of 30 cases  

PubMed Central

To analyze characteristics of electrocardiogram (ECG), electrophysiological intracardiac mapping and radiofrequency ablation (RF) of paroxysmal atrial fibrillation (PAF) originating from superior vena cava (SVC), aiming to investigate electrophysiological characteristics of PAF with SVC origin. Clinical data of 30 subjects (18 men and 12 women, aged, 58.6 ± 15.5 years) with PAF of SVC origin were retrospectively analyzed; All patients underwent RF during 2006.9-2012.7. ECG of AF and atrial premature contractions (APCs), procedure and fluoroscopic time, numbers of ablation sites within SVC, complications and success rate were studied. Compared with P wave of sinus rhythm (SR), APCs of SVC origin exhibited higher amplitude in lead II (0.23 ± 0.11 vs. 0.15 ± 0.06 mv), III (0.19 ± 0.09 vs. 0.13 ± 0.08 mv), AVF (0.21 ± 0.13 vs. 0.14 ± 0.10 mv), V2 (0.24 ± 0.07 vs. 0.15 ± 0.09 mv) and V3 (0.21 ± 0.09 vs. 0.12 ± 0.05 mv) (P < 0.05), as well as more biphasic polarity in lead V1 (80.0% vs. 26.6%, P < 0.05) and isoelectric in AVL (60.0% vs. 6.7%, P < 0.05). In terms of left pulmonary vein (LPV) and right pulmonary vein (RPV) electrical isolation, procedure time (14.3 ± 11.5 vs. 33.7 ± 14.2, 28.1 ± 6.8 min, P < 0.05), fluoroscopic time (9.6 ± 3.8 vs. 21.1 ± 9.3, 19.4 ± 9.7 min, P < 0.05), ablation sites (11.2 ± 3.1 vs. 37.1 ± 13.7, 31.4 ± 10.4 points, P < 0.05) of SVC isolation (SVCI) remarkably decreased compared with that of mean LPV and RPV. After the procedure, 9 patients still presented paroxymal rapid firing within the SVC in the setting of SR restoration, 2 patients developed paroxysmal atrial flutter within 1 month after completion of ablation and were controlled by antiarrhythmic drugs. The APCs and AF of SVC origin manifested distinctive ECG features, which could be helpful to distinguish SVC from other foci before ablation, the completion of SVCI required shorter procedure and fluoroscopic time, as well as less ablation points, and meanwhile, the success rate was high with less complication. PMID:25784993

Shi, Xiang-Min; Yuan, Hong-Tao; Guo, Hong-Yang; Guo, Jian-Ping; Shan, Zhao-Liang; Wang, Yu-Tang

2015-01-01

58

Prenatal diagnosis of partial anomalous pulmonary venous connection by detection of dilatation of superior vena cava in hypoplastic left heart. A case report.  

PubMed

A 27-week fetus was given targeted fetal echocardiography due to an abnormal four-chamber view. A complex heart malformation was seen with two atria, a single ventricle, and aortic and mitral atresia. In addition to intracardiac findings, a dilated superior vena cava (SVC) was seen, suggesting a possible abnormal pulmonary venous connection to the SVC. An increased venous flow (up to 90 cm/s) was recorded as well. The course of pregnancy was uneventful and the baby was delivered vaginally at term. Cardiac surgery was planned but the baby died on 4th day of life. The autopsy findings confirmed both intracardiac anomalies as well as partial anomalous venous connection to SVC, with no apparent obstruction. This is the first report which stresses that dilatation of the fetal SVC may be suspicious for partial abnormal pulmonary venous connection during prenatal life. PMID:12169816

Respondek-Liberska, Maria; Janiak, Katarzyna; Moll, Jadwiga; Ostrowska, Katarzyna; Czichos, Ewa

2002-01-01

59

Surgical experience with right atrial-aortic fistula and penetration of the superior vena cava by a protruding Accufix atrial J-shaped retention wire.  

PubMed

A 57-year-old woman who had a dual chamber pacemaker implanted in June 1990 for sick sinus syndrome had developed heart failure since 1993. Although fluoroscopy revealed that the proximal J-shaped retention wire of the lead had fractured and had protruded through the outer insulation in 1994, and also that the distal J-shaped retention wire of the lead had protruded through the outer insulation in 1997, a transthoracic echocardiographic examination diagnosed tricuspid valve regurgitation, suggesting that the right atrial-aortic fistula might have been overlooked. In an attempt to avoid migration of the J-shaped retention wire from the lead and to repair the tricuspid regurgitation, it was decided that an operation be performed; however, intraoperative transesophageal echocardiography showed a right atrial-aortic fistula. Intraoperative inspection also revealed that the right atrial-aortic fistula and penetration of the superior vena cava had been caused by the Accufix atrial J-shaped retention wire. Under total cardiopulmonary bypass and induced cardiac arrest, a right atriotomy was performed and the atrial and ventricular leads were removed from the tips. The atrial orifice of the fistula and the aortic orifice were closed. Finally, a new dual-chamber pacing system with bipolar epicardial pacing leads was implanted. Postoperative inspection revealed that the proximal retention wire had fractured, the tip of the retention wire had protruded through the outer insulation, and the distal J-shaped outer insulation was damaged. PMID:12419943

Kido, Masakuni; Otani, Hajime; Kawaguchi, Hideki; Ninomiya, Hideki; Fujiwara, Shoji; Fujiwara, Hiroyoshi; Nakao, Yoshihisa; Sato, Tadashi; Imamura, Hiroji

2002-11-01

60

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

61

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

62

[War wounds of the upper vena cava. Recovery after management from Sarajevo to Paris].  

PubMed

Penetrating chest injuries involving the superior veina cava are a seldom observed entity to our knowledge. Most often they cause death before the patient can reach a surgical facility; because of the exsanguination and a difficult surgical approach. The authors report a war-case of superior veina cava injury and have reviewed and analysed the literature concerning the issue of immediate intensive care and surgical approach of such life threatening injuries; especially in war conditions. PMID:7805493

Jancovici, R; Dubrez, J; Legulluche, Y; Litzler, P Y; Oscariz, D; Lhomme Desages, B; Brinquin, L; Linden, L J; Hervé, L

63

Vena Cava 3D Contrast-Enhanced MR Venography: A Pictorial Review  

SciTech Connect

Three-dimensional contrast-enhanced magnetic resonance venography (CE MRV) is a sensitive and accurate method for diagnosing vena cava pathologies. The commonly used indirect approach involves a nondiluted gadolinium contrast agent injected into an upper limb vein or, occasionally, a pedal vein for assessment of the superior or inferior vena cava. In our studies, a coronal 3D fast multi-planar spoiled gradient-echo acquisition was used. A pre-contrast scan was obtained to ensure correct coverage of the region of interest. We initiated contrast-enhanced acquisition 15 sec after the start of contrast agent injection and performed the procedure twice. The image sets were obtained during two 20-30-sec breath hold, with a breathing rest of 5-6 sec, to obtain the first-pass and delayed arteriovenous phases. For patients with Budd-Chiari syndrome, a third acquisition coinciding with late venous phase was collected to visualize the hepatic veins, which was carried out by one additional acquisition after a 5-6-sec breathing time. This review describes the clinical application of 3D CE MRV in vena cava congenital anomalies, superior and inferior vena cava syndrome, Budd-Chiari syndrome, peripheral vein thrombosis extending to the vena cava, pre-operational evaluation in portosystemic shunting and post-surgical follow-up, and road-mapping for the placement and evaluation of complications of central venous devices.

Lin Jiang; Zhou Kangrong; Chen Zuwang; Wang Jianhua; Yan Ziping [Zhongshan Hospital, Fudan University, Department of Radiology (China); Wang, Yi-Xiang J. [Current with Astrazeneca Pharmaceuticals (United Kingdom)], E-mail: yi-xiang.wang@astrazeneca.com

2005-12-15

64

[Traumatic thrombosis of the inferior vena cava].  

PubMed

Traumatic thrombosis of vena cava is rare. Thrombosis of the inferior vena cava diagnosed by uroscanner after blunt abdominal trauma involving the kidney is reported. The Doppler exam confirmed the floating character of the clot. Three days after the initiation of anticoagulant therapy, the thrombus disappeared without any clinical or radiological signs of pulmonary embolism. Fifteen cases of traumatic thrombosis of the inferior vena cava have been described in the literature. Mechanisms, clinical pictures and the management are discussed. PMID:15324965

Mouaffak, Y; Mikou, M M; Benyacob, A; Mosaddek, A; Faroudy, M; Ababou, A; Lazreq, C; Sbihi, A

2004-07-01

65

A novel technique for inferior vena cava filter extraction.  

PubMed

Inferior vena cava (IVC) filters are used to protect against pulmonary embolism in high-risk patients. Whilst the insertion of retrievable IVC filters is gaining popularity, a proportion of such devices cannot be removed using standard techniques. We describe a novel approach for IVC filter removal that involves snaring the filter superiorly along with the use of flexible forceps or laser devices to dissect the filter struts from the caval wall. This technique has used to successfully treat three patients without complications in whom standard techniques failed. PMID:23636251

Johnston, Edward William; Rowe, Luke Michael Morgan; Brookes, Jocelyn; Raja, Jowad; Hague, Julian

2014-02-01

66

Transapical closure of paraprosthetic mitral leak in a patient with inferior vena cava interruption and azygos continuation.  

PubMed

Para-valvular leaks represent a relevant post-operative complication of cardiac valve replacement, often causing heart failure or severe hemolysis. We report a case of a 72 year-old woman with aortic and mitral mechanical prostheses who developed hemolytic anemia because of a para-prosthetic mitral leak. Chest tomography in such patient unexpectedly documented inferior vena cava interruption with azygos continuation into superior vena cava. Given the high surgical risk, the venous anomaly and the presence of the aortic valve prosthesis, transcatheter leak closure via antero-lateral mini-thoracotomy and transapical approach was performed. PMID:24048023

Mega, Simona; Patti, Giuseppe; Carminati, Mario; Sedati, Pietro; D'Ambrosio, Andrea; Di Sciascio, Germano

2015-01-01

67

21 CFR 870.3260 - Vena cava clip.  

Code of Federal Regulations, 2011 CFR

...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 clip is an implanted extravascular...

2011-04-01

68

21 CFR 870.3260 - Vena cava clip.  

Code of Federal Regulations, 2013 CFR

...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 clip is an implanted extravascular...

2013-04-01

69

21 CFR 870.3260 - Vena cava clip.  

Code of Federal Regulations, 2014 CFR

...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 clip is an implanted extravascular...

2014-04-01

70

21 CFR 870.3260 - Vena cava clip.  

Code of Federal Regulations, 2010 CFR

...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 clip is an implanted extravascular...

2010-04-01

71

Isolated dilatation of the inferior vena cava  

PubMed Central

The diameter and collapsibility of the inferior vena cava (IVC) should be interpreted in consideration with other clinical and echocardiographic parameters before drawing definitive diagnostic conclusions. We report a case of a 46-year-old female with isolated IVC dilation and diminished inspiratory collapse without other abnormalities, and provide a brief review of the literature. PMID:24648809

Kim, Jae-Joon; Kang, Ji-Hoon; Goo, Ja-Jun; Kim, Kyoung-Nyoun; Lee, Ja-Young; Kim, Seong-Man

2014-01-01

72

Isolated dilatation of the inferior vena cava.  

PubMed

The diameter and collapsibility of the inferior vena cava (IVC) should be interpreted in consideration with other clinical and echocardiographic parameters before drawing definitive diagnostic conclusions. We report a case of a 46-year-old female with isolated IVC dilation and diminished inspiratory collapse without other abnormalities, and provide a brief review of the literature. PMID:24648809

Kim, Jae-Joon; Cho, Kyoung-Im; Kang, Ji-Hoon; Goo, Ja-Jun; Kim, Kyoung-Nyoun; Lee, Ja-Young; Kim, Seong-Man

2014-03-01

73

Pleural effusion in hepatic vena cava disease.  

PubMed

Pleural effusion is not uncommon in developing countries. It is usually considered to be due to tuberculosis and treated with anti-tubercular chemotherapy without much diagnostic workup. Hepatic vena cava disease (HVD), a disease caused by obliterative lesion of the hepatic portion of inferior vena cava induced by bacterial infection is common in developing countries. We report here the occurrence of pleural effusion in 10% of the cases of HVD. Four patients, one with acute and three with chronic HVD that presented with pleural effusion are described. Pleural effusion in HVD responded to treatment with antibiotic and diuretic. In developing countries HVD should be considered in the differential diagnosis of pleural effusion. It is postulated that bacterial infection and sodium retention resulting from acute caval obstruction are important in the pathogenesis of pleural effusion in HVD. PMID:18604023

Shrestha, S M

2007-01-01

74

Prosthetic replacement of the inferior vena cava for malignancy  

Microsoft Academic Search

Purpose: Invasion of the inferior vena cava (IVC) by tumor is generally considered a criterion of unresectability. This study was designed to review the outcomes of a strategy of aggressive resection of the vena cava to achieve complete tumor resection coupled with prosthetic graft placement to re-establish caval flow. Methods: Retrospective review of patients treated at a university referral center.

Rajabrata Sarkar; Frederick R. Eilber; Hugh A. Gelabert; William J. Quinones-Baldrich

1998-01-01

75

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

76

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

77

Inferior vena cava filter penetration into right proximal ureter.  

PubMed

Inferior vena cava (IVC) filter penetration into the renal collecting system is an infrequent event. We report a case of IVC filter penetration into the right proximal ureter resulting in gross hematuria, hydronephrosis and stone formation. PMID:24529023

Sherman, Christopher M; Rao, Sandhya R; Talluri, Sriharsha; Dwivedi, Amit J; Ankem, Murali K

2014-02-01

78

Neurosecretion in the vena cava of the cephalopod Eledone cirrosa  

Microsoft Academic Search

1.It is thought that the extensive system of nerves passing into the wall of the anterior vena cava in Eledone cirrosa has a neurosecretory function. Examination of the fine structure of the nerve terminations demonstrated the presence of large numbers of electron-dense granules similar to those described in known neurosecretory tissue.2.Extracts of the anterior vena cava have a persistent excitatory

C. F. Berry; G. A. Cottrell

1970-01-01

79

Pacemaker-associated thrombotic occlusion of the inferior vena cava causing liver failure.  

PubMed

Pacemaker implantation using endocardial leads can give rise to thrombotic venous occlusion. We report the case of a 23-year-old male with transposition of the great arteries, who had previously undergone a Senning repair at the age of one year. A sick sinus syndrome required pacemaker implantation with subsequent multiple lead revisions. Following the implantation of the last lead, the patient developed complete occlusion of the inferior vena cava (IVC) with stenosis of the superior vena cava (SVC) with pacemaker leads in both lesions. Liver failure, ascites and esophageal varices developed. Thrombolytic treatment was ineffective; finally the patient was listed for liver transplantation. We explanted the lead embedding the thrombosis, together with some lead remnants. The stenosis of the SVC and the occlusion of the IVC were dilatated and stabilized with four stents. Over a follow-up period of 4 months, NYHA class improved from NYHA III to NYHA I-II, the hepatic function showed complete remission, and a liver transplantation was not necessary. PMID:20922629

Schroeter, T; Dähnert, I; Doll, N; Mohr, F W; Borger, M A

2010-10-01

80

Douglas Oliver SUPERIOR OLIVE  

E-print Network

Douglas Oliver SUPERIOR OLIVE Douglas Oliver University of Connecticut Health Center #12;Auditory Pathways CORTEX Auditory CortexGLUT GABA MGB GABA GLY Medial Geniculate Body IC DLL DLL Inferior Colliculus medial superior superior olive; olive; LSO: LSO: lateral lateral superior superior oliveolive NTB

Oliver, Douglas L.

81

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

82

Vena cava bypass with stented polytetrafluoroethylene bifurcated grafts. A report of 2 cases.  

PubMed Central

Severe stenosis or occlusion of either the superior or the inferior vena cava requires surgical bypass grafting in a selected group of patients. When the obstruction extends into the major tributaries, a bifurcated graft becomes necessary. We present the cases of 2 surgically treated patients, each of whom received a stented polytetrafluoroethylene bifurcated graft constructed at the time of the operation. Symptoms disappeared post-operatively in 1 patient and abated in the other. Both grafts became occluded within 1 year; however, that was sufficient time for collateral venous circulation to develop, enabling both patients to respond well to conservative therapy. We conclude that stented polytetrafluoroethylene bifurcated grafts may be suitable for selected patients as a bridge until collateral veins can form. The development of more compliant venous grafts may provide even more favorable results. Images PMID:8298327

Del Campo, C; Casey, M T

1993-01-01

83

Imaging evaluation of the inferior vena cava.  

PubMed

The inferior vena cava (IVC) is an essential but often overlooked structure at abdominal imaging. It is associated with a wide variety of congenital and pathologic processes and can be a source of vital information for referring clinicians. Initial evaluation of the IVC is most likely to occur at computed tomography performed for another indication. Many routine abdominal imaging protocols may result in suboptimal evaluation of the IVC; however, techniques to assist in specific evaluation of the IVC can be used. In this article, the authors review the spectrum of IVC variants and pathologic processes and the relevant findings from magnetic resonance imaging, angiography, sonography, and positron emission tomography. Embryologic development of the IVC and examples of congenital IVC variants, such as absence, duplication, left-sided location, azygous or hemiazygous continuation, and web formation, are described. The authors detail IVC involvement in Wilms tumor, leiomyosarcoma, adrenal cortical carcinoma, testicular carcinoma, hepatocellular carcinoma, renal cell carcinoma, and other neoplasms, as well as postsurgical, traumatic, and infectious entities (including filter malposition, mesocaval shunt, and septic thrombophlebitis). The implications of these entities for patient treatment and instances in which specific details should be included in the dictated radiology report are highlighted. Furthermore, the common pitfalls of IVC imaging are discussed. The information provided in this review will allow radiologists to detect and accurately characterize IVC abnormalities to guide clinical decision making and improve patient care. (©)RSNA, 2015. PMID:25763740

Smillie, Richard P; Shetty, Monisha; Boyer, Andrew C; Madrazo, Beatrice; Jafri, Syed Zafar

2015-01-01

84

[Prosthesis replacement of the inferior vena cava].  

PubMed

The development of reconstructive venous surgery has been hampered by the lack of suitable graft materials. Fourteen carbon fibre grafts (phi: 8 mm), 30 glutaraldehyde treated ovine collagen grafts and 29 polytetrafluoroethylene (PTFE) grafts were used to replace a 35 mm segment of infrarenal inferior vena cava in pigs. Prostheses were removed 1 hour and 7, 14, 28, 56 and 112 days after implantation. All specimens were examined by light and scanning electron microscopy. The 112 day patency rate was 67% for ovine collagen grafts, while all carbon and PTFE grafts thrombosed. The difference was statistically significant (p less than 0.01). During the first hour after implantation, a thick (800-900 microns) thrombotic layer deposited on the inner surface of carbon grafts. This layer possibly caused the subsequent complete occlusion of the tubular segments. A thin neointima (less than 200 microns) developed on the flow surface of ovine collagen prostheses. This favoured complete endothelialization of the graft inner surface as soon as four weeks after surgery. In conclusion, glutaraldehyde treated ovine collagen would represent the first sound material to be used as venous substitute. PMID:2336155

Ratto, G B; Frascio, M; Secco, G B; Canepa, G; Fardelli, R

1990-01-01

85

BANDO DI PARTECIPAZIONE al PREMIO TESI "ADRIANA CAVA" 2014 Torino, 20 marzo 2014  

E-print Network

BANDO DI PARTECIPAZIONE al PREMIO TESI "ADRIANA CAVA" 2014 Torino, 20 marzo 2014 Adriana Cava Jazz compagnia di danza jazz di Adriana Cava, operanti da molti anni sul territorio nazionale per la formazione professionale di danzatori jazz e per la divulgazione di un genere di danza fra i più conosciuti e diffusi nel

Guidoni, Leonardo

86

Dynamic aspects of expanding cava septi pellucidi et Vergae.  

PubMed

Two paediatric patients with expanding cysts of the cava Vergae et septi pellucidi are presented. In the first patient, consecutive CT scans showed a growing cavum thought to be responsible for his dramatic increase in head circumference. In the other patient, the expanding cavum was discovered because a routine skull X-ray after minor head trauma revealed marked impressiones digitatae. Both patients were successfully treated with stereotactically placed internal shunts from the cysts via the lateral ventricle to the subarachnoid space. During this procedure, contrast medium was instilled, and the cysts were visualized on postoperative CT scans. Some dynamic aspects of such expanding cava are discussed. PMID:2251944

Wester, K; Pedersen, P H; Larsen, J L; Waaler, P E

1990-01-01

87

Pseudo interruption of the inferior vena cava complicating the device closure of patent ductus arteriosus: Case report and short review of venous system embryology  

PubMed Central

A nineteen-month-old girl was taken up for patent ductus arteriosus (PDA) device closure. A diagnostic catheter from the right femoral venous access entered the superior vena cava (SVC), through the azygos vein suggesting interruption of inferior vena caval with azygos continuity. Therefore, the PDA device was closed from the right jugular venous access. However, a postprocedure echocardiogram (echo) showed a patent inferior vena caval connection into the right atrium. An angiogram from femoral veins showed communication between the iliac veins and the azygos system, in addition to normal drainage into the inferior vena cava (IVC). Congenital communication between the iliac veins and the azygos system can mimic IVC interruption. An attempt to theoretically explain the embryological origin of the communication has been made. PMID:24701092

Subramanian, Venkateshwaran; Mahadevan, Krishnamoorthy Kavassery; Sivasubramonian, Sivasankaran; Tharakan, Jaganmohan

2014-01-01

88

Pseudo interruption of the inferior vena cava complicating the device closure of patent ductus arteriosus: Case report and short review of venous system embryology.  

PubMed

A nineteen-month-old girl was taken up for patent ductus arteriosus (PDA) device closure. A diagnostic catheter from the right femoral venous access entered the superior vena cava (SVC), through the azygos vein suggesting interruption of inferior vena caval with azygos continuity. Therefore, the PDA device was closed from the right jugular venous access. However, a postprocedure echocardiogram (echo) showed a patent inferior vena caval connection into the right atrium. An angiogram from femoral veins showed communication between the iliac veins and the azygos system, in addition to normal drainage into the inferior vena cava (IVC). Congenital communication between the iliac veins and the azygos system can mimic IVC interruption. An attempt to theoretically explain the embryological origin of the communication has been made. PMID:24701092

Subramanian, Venkateshwaran; Mahadevan, Krishnamoorthy Kavassery; Sivasubramonian, Sivasankaran; Tharakan, Jaganmohan

2014-01-01

89

Duodenal perforation caused by an inferior vena cava filter.  

PubMed

The inferior vena cava (IVC) filter is known as an effective and safe method for preventing fatal pulmonary thromboembolism in patients with deep vein thrombosis. Usually, the remaining IVC filters are asymptomatic and do not cause clinical problems. We report a case of duodenal perforation caused by a remaining IVC filter. PMID:22363914

Bae, Mi Ju; Chung, Sung Woon; Lee, Chung Won; Kim, Sangpil; Song, Seunghwan

2012-02-01

90

Three Different Morphologies of Inferior Vena Cava Thrombosis: Case Reports  

PubMed Central

Inferior vena cava (IVC) thrombosis is a rare but significant complication in hospitalized patients. However, relevant information regarding IVC thrombosis, especially on its morphology, remains scarce. We present three cases of IVC thrombosis, with each showing a different morphology: mural, floating, and small polyp-like thrombus. PMID:24716095

Okayama, Satoshi; Nakada, Yasuki; Uemura, Shiro; Saito, Yoshihiko

2014-01-01

91

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

92

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

PubMed

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

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

2014-12-01

93

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

94

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

95

Management of the thrombosed filter-bearing inferior vena cava.  

PubMed

Inferior vena cava (IVC) filter thrombosis is a complex problem. Thrombus within an IVC filter may range from an asymptomatic small thrombus to critical IVC occlusion that affects both lower extremities. The published experience of IVC thrombosis management in relation to filters is either anecdotal or limited to a small group of patients; however, endovascular treatment methods appear to be safe and effective in patients with IVC thrombosis. This review focuses on filter-related IVC thrombosis and its endovascular management. PMID:23449290

Sildiroglu, Onur; Ozer, Harun; Turba, Ulku Cenk

2012-03-01

96

Passive elastic properties of the rat abdominal vena cava  

Microsoft Academic Search

The quasistatic passive venous elastic properties were studied in-vitro on 6 cylindrical segments of abdominal vena cava from Wistar rats. Using noncontact methods of deformation measurement, diameters and axial force of the segments were analyzed as a function of simultaneous axial stretch and internal pressure in the physiological range of 0–2.7 kPa. The elasticity of the wall tissue was investigated

Hans Werner Weizsäcker

1988-01-01

97

Management of the Thrombosed Filter-Bearing Inferior Vena Cava  

PubMed Central

Inferior vena cava (IVC) filter thrombosis is a complex problem. Thrombus within an IVC filter may range from an asymptomatic small thrombus to critical IVC occlusion that affects both lower extremities. The published experience of IVC thrombosis management in relation to filters is either anecdotal or limited to a small group of patients; however, endovascular treatment methods appear to be safe and effective in patients with IVC thrombosis. This review focuses on filter-related IVC thrombosis and its endovascular management. PMID:23449290

Sildiroglu, Onur; Ozer, Harun; Turba, Ulku Cenk

2012-01-01

98

Endovascular reconstruction of an interrupted inferior vena cava?  

PubMed Central

INTRODUCTION Inferior vena cava (IVC) interruption was established as a procedure to treat refractory venous thromboembolism (VTE) complicated by pulmonary embolism. Ilio-caval thrombosis and lower limb chronic venous insufficiency (CVI) are well known long-term complications of IVC interruption, where subsequent treatments may carry significant morbidity and mortality. PRESENTATION OF CASE We present here a case of chronic venous insufficiency resulting from IVC interruption with a vascular clip placed forty years previously. A novel approach utilising endovascular stents was used to reconstruct the iliocaval confluence and interrupted distal IVC without the need for laparotomy to remove the plicating clip. This procedure was associated with minimal morbidity and resulted with a quick resolution of the patient's CVI symptoms. DISCUSSION Endovascular angioplasty and stenting is an alternative to open reconstruction of the interrupted inferior vena cava. We have demonstrated successful opening of a plication vascular clip using only endovascular utilities. Advantages include a shorter hospital stay, and reduced morbidity and mortality when compared to a re-do laparotomy. CONCLUSION Endovascular stents may be used safely and effectively to reconstruct the surgically interrupted inferior vena cava in the treatment of chronic venous insufficiency. PMID:24441437

Thomas, Shannon D.; Ofri, Adam; Tang, Tjun; Englund, Raymond

2013-01-01

99

Malignant epithelioid angiomyolipoma invading the inferior vena cava: Using a temporary vena cava filter to prevent tumour emboli during nephrectomy  

PubMed Central

Angiomyolipoma (AML) is generally considered to be benign and malignant angiomyolipoma is rare. This paper presents an extremely rare case of epithelioid AML with tumour thrombus invading inferior vena cava (IVC). We present the case of a 36-year-old woman with epithelioid AML with tumour thrombus invading inferior vena cava who underwent radical nephrectomy and IVC thrombectomy. As an adjunctive procedure, a temporary IVC filter was placed in suprarenal position before operation. One week after surgery, the temporary IVC filter was retrieved by femoral approach. Three months postoperatively, a computed tomography scan and abdominal ultrasonogaphy showed no evidence of thrombus in IVC or renal vein and no sign of tumour recurrence. Epithelioid AML is extremely rare and can be malignant, with invasion of the IVC or renal vein. Implanting temporary filter can prevent fatal pulmonary complication and avoid potential the side effects of permanent filter. PMID:25210566

Li, Xiang; Liu, Runming; He, Dalin

2014-01-01

100

Malignant epithelioid angiomyolipoma invading the inferior vena cava: Using a temporary vena cava filter to prevent tumour emboli during nephrectomy.  

PubMed

Angiomyolipoma (AML) is generally considered to be benign and malignant angiomyolipoma is rare. This paper presents an extremely rare case of epithelioid AML with tumour thrombus invading inferior vena cava (IVC). We present the case of a 36-year-old woman with epithelioid AML with tumour thrombus invading inferior vena cava who underwent radical nephrectomy and IVC thrombectomy. As an adjunctive procedure, a temporary IVC filter was placed in suprarenal position before operation. One week after surgery, the temporary IVC filter was retrieved by femoral approach. Three months postoperatively, a computed tomography scan and abdominal ultrasonogaphy showed no evidence of thrombus in IVC or renal vein and no sign of tumour recurrence. Epithelioid AML is extremely rare and can be malignant, with invasion of the IVC or renal vein. Implanting temporary filter can prevent fatal pulmonary complication and avoid potential the side effects of permanent filter. PMID:25210566

Li, Xiang; Liu, Runming; He, Dalin

2014-07-01

101

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

Microsoft Academic Search

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,

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

2009-01-01

102

Fucoidans from Brown Seaweeds Sargassum hornery , Eclonia cava , Costaria costata : Structural Characteristics and Anticancer Activity  

Microsoft Academic Search

Fucoidans were isolated by water extraction and ion-exchange chromatography from brown algae Eclonia cava, Sargassum hornery, and Costaria costata collected near of Korean coasts. The structures of fucoidans were investigated. Fucoidan from E. cava was mixture of sulfated rhamnogalactofucan and galactofucan. Fucoidan from C. costata was a sulfated galactofucan. Fucoidan isolated from S. hornery was separated into three fractions: a

Svetlana Ermakova; Roza Sokolova; Sang-Min Kim; Byung-Hun Um; Vladimir Isakov; Tatyana Zvyagintseva

2011-01-01

103

[Perioperative management of two patients with renal malignant tumor involving the vena cava].  

PubMed

Two patients underwent resection of renal malignant tumors involving vena cava. Such tumors occasionally extend to the inferior vena cava with tumor thrombus and invasion to the lymph nodes and adjacent organs. Perioperative management of patients with these tumors is difficult because of the risk of pulmonary embolism and massive bleeding, and requires appropriate cooperation among the surgical team. In case 1, a 56-year-old man, renal cell carcinoma with tumor thrombus had extended into the intrahepatic vena cava. It was resected after isolating the liver from vena cava and incising the cross-clamped inferior vena cava without extracorporeal circulation or blood transfusion. A prosthetic graft replaced the inferior vena cava. In case 2, a 64-year-old woman, renal pelvis cancer adhered to the inferior vena cava and the mesentery with enlarged lymph nodes. It was separated from the inferior vena cava and removed with the ascending colon. The patient received a blood transfusion of approximately 2,000ml. Cardiomyopathy associated with a left ventricular outflow tract pressure gradient of 100mmHg required perioperative management. After surgery, both patients underwent controlled ventilation in the intensive care unit. After recovery, they were discharged without complications. We discuss perioperative management, with regard to the level of the tumor extension and perioperative complications. PMID:23697205

Sato, Tsunehisa; Kikura, Mutsuhito; Kobori, Go; Goto, Shuhei; Yoshikawa, Takeshi; Moroi, Seiji; Koi, Shiro; Iwai, Akira; Inoue, Harutaka; Teratani, Naoki; Kaganoi, Junichi; Nakayama, Noboru; Takatoku, Kazuhiro; Nishio, Hiroomi; Aoki, Takayuki; Nishizawa, Junichiro; Kanda, Hiroshi; Shinoda, Eiji

2013-04-01

104

Circumflex Coronary Artery Bypass via the Posterior Interatrial Sulcus and under the Venae Cavae  

PubMed Central

During coronary artery bypass grafting, the length of the graft to the circumflex coronary artery or its end branches can be underestimated because of the posterior location of the circumflex. Herein, we describe a new bypass route—which we consider the shortest—to the ascending aorta. In 2 patients, during proximal anastomosis of the saphenous vein bypass graft (via a route either anterior to the pulmonary artery or the transverse sinus) from the circumflex to the ascending aorta, the vein graft (approximately 5–6 cm in length) proved too short. We performed bypass in a new direction—from the circumflex coronary artery to the right side of the ascending aorta, under the inferior and superior venae cavae and along the interatrial groove—without the need for graft lengthening. To our knowledge, the bypass route to the circumflex system described herein is new. This new route can be successfully used when the bypass conduit is too short to follow the conventional route. Our 2 patients benefited from this approach and were in Canadian Cardiovascular Society Class l two years after the surgical procedure. PMID:18612494

Cebi, Niyazi; Walterbusch, Gerhard

2008-01-01

105

Circumflex coronary artery bypass via the posterior interatrial sulcus and under the venae cavae.  

PubMed

During coronary artery bypass grafting, the length of the graft to the circumflex coronary artery or its end branches can be underestimated because of the posterior location of the circumflex. Herein, we describe a new bypass route--which we consider the shortest--to the ascending aorta. In 2 patients, during proximal anastomosis of the saphenous vein bypass graft (via a route either anterior to the pulmonary artery or the transverse sinus) from the circumflex to the ascending aorta, the vein graft (approximately 5-6 cm in length) proved too short. We performed bypass in a new direction--from the circumflex coronary artery to the right side of the ascending aorta, under the inferior and superior venae cavae and along the interatrial groove--without the need for graft lengthening. To our knowledge, the bypass route to the circumflex system described herein is new. This new route can be successfully used when the bypass conduit is too short to follow the conventional route. Our 2 patients benefited from this approach and were in Canadian Cardiovascular Society Class l two years after the surgical procedure. PMID:18612494

Cebi, Niyazi; Walterbusch, Gerhard

2008-01-01

106

Jess Manuel Giz Novo Tcnico Superior de Mantenimiento  

E-print Network

Jesús Manuel Giz Novo Técnico Superior de Mantenimiento Servicio de Arquitectura y Urbanismo Mejora sostenibilidad como así ocurre en el caso del Servicio de Arquitectura y Urbanismo y la Oficina de Medioambiente dependientes del VIXA. Jesús Manuel Giz Novo Servicio de Arquitectura y Urbanismo #12;La UDC está presente de

Fraguela, Basilio B.

107

Bilateral anomalous pulmonary venous connection to bilateral superior caval veins.  

PubMed

A four-year-old girl presented with superior vena cava (SVC) type of sinus venosus defect, right upper pulmonary vein draining into right SVC-right atrium junction, left upper lobe pulmonary veins draining into the lower part of persistent left SVC (LSVC), and a patent ductus arteriosus. The anomalous pulmonary venous drainage to LSVC was overlooked in the preoperative evaluation and was found intraoperatively. Warden procedure was performed for right-sided veins. Lower LSVC draining the anomalous pulmonary veins was anastomosed to the left atrial appendage. The short stump of LSVC was diverted to left pulmonary artery. Anomalous pulmonary venous connections to LSVC are rare. Embryology of venous development is analyzed with respect to this rare anomaly, and options for surgical correction are discussed. PMID:24403371

Sasikumar, Navaneetha; Ramanan, Sowmya; Chidambaram, Shanthi; Rema, Krishna Manohar Soman; Cherian, Kootturathu Mammen

2014-01-01

108

Penetration of an inferior vena cava filter into the aorta.  

PubMed

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. PMID:25593628

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

2014-01-01

109

Retrievable inferior vena cava filters for venous thromboembolism.  

PubMed

Inferior vena cava (IVC) filters are used as an alternative to anticoagulants for prevention of fatal pulmonary embolism (PE) in venous thromboembolic disorders. Retrievable IVC filters have become an increasingly attractive option due to the long-term risks of permanent filter placement. These devices are shown to be technically feasible in insertion and retrieval percutaneously while providing protection from PE. Nevertheless, there are complications and failed retrievals with these retrievable filters. The aim of the paper is to review the retrievable filters and their efficacy, safety, and retrievability. PMID:24967292

Ni, Han; Win, Lei Lei

2013-01-01

110

Improving retrieval rates for retrievable inferior vena cava filters.  

PubMed

The introduction of retrievable inferior vena cava (IVC) filters was an important step in the evolution of deep vein thrombosis/pulmonary embolism management. Their removability makes them preferred to permanent filters in many cases. IVC filter retrieval often occurs at a suboptimal rate, leading to complications associated with long-term placement. Improving retrievability includes solutions for patients being lost to follow-up, filter malpositioning, need arising for permanent IVC filtration, filtration requiring longer than the filter's window of retrievability, and filter compromise by the presence of a large trapped clot. This review explores these strategies for retrieval in detail in hopes of improving IVC filter retrieval rates. PMID:23278230

Dixon, Austin; Stavropoulos, S William

2013-01-01

111

Complex hybrid suprarenal inferior vena cava filter retrieval.  

PubMed

The exponential rise in inferior vena cava (IVC) filter placement is associated with increased complications both during implantation and retrieval. In this report, a 64-year-old man was transferred from an outside hospital with cardiac tamponade secondary to a snare eroding into the right atrium. This complication occurred after attempted suprarenal IVC filter removal. The filter, entangled with the snare, was retrieved by a hybrid technique of mobilizing the liver to expose the suprarenal IVC, followed by using a snare and sheath to compress and extrude the filter. This is the first reported hybrid retrieval of a suprarenal IVC filter. PMID:25304904

Chou, Elizabeth L; Sgroi, Michael D; Fujitani, Roy M; Kabutey, Nii-Kabu

2015-01-01

112

Inferior vena cava filter presenting as chronic low back pain.  

PubMed

Our purpose is to report a rare complication of an inferior vena cava (IVC) filter with vertebral bone penetration, interval fracture, subsequent endovascular management and outcome. We report a case of an IVC filter embedded within the second lumbar vertebral body and in which one of the primary struts fractured, which presented as chronic low back pain. The filter was retrieved percutaneously approximately 2 years after placement. A fractured small strut remained within the vertebral bone; patient's pain resolved. Symptomatic filter in situ should be retrieved even when fractured. PMID:22542386

Kendirli, Mustafa T; Sildiroglu, Onur; Cage, Dorothy L; Turba, Ulku C

2012-01-01

113

Inferior vena cava filter placement before ECMO decannulation.  

PubMed

Venous thromboembolism (VTE), particularly thrombi in the inferior vena cava (IVC) and pulmonary embolism, can occur after successful extracorporeal membrane oxygenation (ECMO) and can be associated with adverse outcomes including death. VTE is related to the presence of a venous cannula and in some cases inadequate anticoagulation caused by clinical bleeding. We have developed a simple method for guidewire exchange of the femoral venous ECMO cannula to a working catheter for intravascular ultrasound (IVUS) IVC filter placement, and describe the specific methodology. PMID:23103700

Obi, Andrea; Park, Pauline K; Rectenwald, John; Novelli, Paula; Waldvogel, John; Haft, Jonathan W; Napolitano, Lena M

2012-01-01

114

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. PMID:25593628

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

2014-01-01

115

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

116

Advanced techniques for removal of retrievable inferior vena cava filters.  

PubMed

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. PMID:21674279

Iliescu, Bogdan; Haskal, Ziv J

2012-08-01

117

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

118

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...

119

Fractured Inferior Vena Cava Filter Strut Presenting with ST-Segment Elevation and Cardiac Tamponade  

PubMed Central

The fracture of an inferior vena cava filter strut and its migration to the heart is a rare sequela of implanted inferior vena cava filters. Perforation through the right ventricle into the pericardium with resultant cardiopulmonary compromise is even less frequent. We report the case of a 53-year-old man who presented with chest pain and hypotension consequent to cardiac tamponade. A fractured inferior vena cava filter strut had migrated and perforated his right ventricle. The fractured strut was successfully removed by means of cardiac surgery. Inferior vena cava filters should be placed when necessary to minimize the risk of pulmonary embolism, and regular radiologic monitoring should be performed; however, the eventual extraction of retrievable filters should be considered. In addition to discussing the patient's case, we briefly review the relevant medical literature. PMID:25873837

Raza, Jaffar; Abrol, Sunil; Coplan, Neil L.

2015-01-01

120

Indications, Management, and Complications of Temporary Inferior Vena Cava Filters  

SciTech Connect

Purpose: We describe the results of a preliminary prospective study using different recently developed temporary and retrievable inferior vena cava (IVC) filters. Methods: Fifty temporary IVC filters (Guenther, Guenther Tulip, Antheor) were inserted in 47 patients when the required period of protection against pulmonary embolism (PE) was estimated to be less than 2 weeks. The indications were documented deep vein thrombosis (DVT) and temporary contraindications for anticoagulation, a high risk for PE, and PE despite DVT prophylaxis. Results: Filters were removed 1-12 days after placement and nine (18%) had captured thrombi. Complications were one PE during and after removal of a filter, two minor filter migrations, and one IVC thrombosis. Conclusion: Temporary filters are effective in trapping clots and protecting against PE, and the complication rate does not exceed that of permanent filters. They are an alternative when protection from PE is required temporarily, and should be considered in patients with a normal life expectancy.

Linsenmaier, Ulrich; Rieger, Johannes; Schenk, Franz; Rock, Clemens; Mangel, Eugen; Pfeifer, Klaus Juergen [Department of Radiology, Klinikum Innenstadt, Ludwig-Maximilians-Universitaet Muenchen, Nussbaumstrasse 20, D-80336 Munich (Germany)

1998-11-15

121

Inferior vena cava filter removal after 317-day implantation.  

PubMed

A Günther Tulip inferior vena cava (IVC) filter was placed prophylactically in a 22-year-old trauma victim with spinal injuries. Attempts to retrieve the filter at 21 and 25 days after placement were aborted as a result of clot trapped in the filter. Despite the possible risk of an IVC laceration, a third attempt was made 317 days after placement in view of the young age of the patient. The filter started collapsing into the retrieval sheath but could not easily be separated from the IVC. During attempted redeployment, the filter would not reopen. The filter was ultimately retrieved with use of additional force. A mild stenosis of the IVC was noted immediately after retrieval. However, the IVC returned to its preretrieval diameter as seen on a 3-month follow-up venogram. PMID:15758137

Binkert, Christoph A; Bansal, Anu; Gates, Jonathan D

2005-03-01

122

Inferior vena cava aneurysm in an infant presenting with a renal mass.  

PubMed

Aneurysm of the inferior vena cava is a rare finding in the pediatric population. We report the case of a 5-month-old infant presenting with anemia, hypertension, and dehydration in the emergency room. A renal mass was found with ultrasound and MRI and a renal tumor was first considered. Histopathologic review of the surgical specimen led to the diagnosis of aneurysmal dilatation of the vena cava. PMID:24390451

Unzueta-Roch, José L; García-Abós, Miriam; Sirvent-Cerdá, Sara; de Prada, Inmaculada; Martínez de Azagra, Amelia; Ollero, Jose M; Madero-López, Luis

2014-10-01

123

Successful removal of a Gunther tulip vena cava filter with wall-embedded hook and migration during a retrieval attempt  

PubMed Central

Retrieval of a Gunther tulip vena cava filter implanted in a patient with inferior vena cava and right common iliac vein thrombosis was attempted by the standard method. Because the filter was tilted, the hook became attached to the vena cava wall and could not be snared. During attempts at removal by an alternative method, the filter migrated toward the right atrium. However, it was finally successfully removed. PMID:23986855

Yamagami, Takuji; Yoshimatsu, Rika; Matsumoto, Tomohiro; Nishimura, Tsunehiko

2013-01-01

124

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

125

A rare case of a complete left inferior vena cava associated with the symptoms of Dunbar syndrome.  

PubMed

We report a case of an 82-year-old female with an anomalous left inferior vena cava. The left inferior vena cava ascends parallel and to the left of the descending abdominal aorta. At the level of the celiac trunk, the inferior vena cava courses anteriorly and to the right to reach the posterior surface of the liver. The patient also suffers from chronic mild postprandial abdominal pain. It is possible that position of inferior vena cava anterior to the aorta, at the level of the celiac trunk, may lead to intermittent celiac artery compression syndrome (Dunbar syndrome). PMID:21322050

Wartmann, Christopher T; Kinsella, Christopher R; Tubbs, R Shane; Loukas, Marios

2011-03-01

126

Endovascular Management of Acute Upper Extremity Deep Venous Thrombosis and the Use of Superior Vena Cava Filters  

PubMed Central

Upper extremity deep venous thrombosis (UEDVT), though less common than lower extremity DVT, is a significant problem with several possible etiologies. The incidence of UEDVT is on the rise, primarily from the increasing use of central venous access devices. However, there are other causes of UEDVT, including primary venous thrombosis (Paget-Schroetter syndrome) and hypercoagulable states associated with underlying malignancy. The morbidity and mortality associated with UEDVT is largely from pulmonary embolism and the postphlebitic syndrome. Nevertheless, many UEDVTs are asymptomatic or patients may present with nonspecific clinical symptoms; therefore, a high index of suspicion is often necessary to make a correct diagnosis. Currently, there is no standard treatment algorithm for UEDVT. Treatment options may range from systemic anticoagulation to surgical correction depending on the etiology of the thrombus, as well as the patient's associated comorbidities, life expectancy and expected quality of life following treatment. PMID:22379271

Koury, Joseph P.; Burke, Charles T.

2011-01-01

127

A neonatal case of thoracoabdominal duplication associated with right congenital diaphragmatic hernia, absent inferior vena cava, and congenital portoazygous shunt: etiopathogenesis and surgical management.  

PubMed

We report on a neonatal case of thoracoabdominal duplication associated with a split notochord syndrome and multiple anomalies. A newborn girl had severe dyspnea and was transferred to our neonatal care unit. At laparotomy, the entire small bowel was herniated into the posterior mediastinum through a defect in the right hemidiaphragm. The small bowel mesentery was firmly fixed to the mediastinum such that a large part of the small bowel could not be repositioned into the abdominal cavity. Imaging studies revealed an absent inferior vena cava with an azygous continuation. The superior mesenteric vein joined the splenic vein to form a portoazygous shunt that ran caudally through the mediastinum and drained into the azygous vein. The patient's intrahepatic portal vein was completely absent. To the best of our knowledge, this is the first reported case of a thoracoabdominal duplication associated with a portoazygous shunt. The etiopathogenesis and surgical management of this complicated case are discussed. PMID:17101341

Hishiki, Tomoro; Ohsone, Yoshiteru; Tatebe, Shunsuke; Kawarasaki, Hideo; Mizuta, Koichi; Saito, Takeshi; Terui, Elena; Muramatsu, Toshinori

2006-11-01

128

Simple hepatic cyst causing inferior vena cava thrombus  

PubMed Central

INTRODUCTION Thrombosis of the inferior vena cava (IVC) is governed by Virchow's triad of stasis of blood flow, endothelial damage and hypercoagulability. Causes may be secondary to malignancy, congenital anomalies or other infrequent events such as external compression. We present a case of external compression of the IVC leading to extensive thrombus burden secondary to a benign hepatic cyst. PRESENTATION OF CASE A 72 year old African American female presented to the emergency department with new onset shortness of breath, right lower extremity weakness and swelling. CT imaging demonstrated multiple hepatic cysts compressing the IVC, leading to extensive clot burden. Treatment with heparin drip was initiated without resolution of her symptoms. Transcatheter mechanical thrombectomy and tPA infusion was performed. After 24 h, swelling and weakness were nearly resolved. The patient was bridged to therapeutic low molecular weight heparin in preparation for surgery. DISCUSSION Management of IVC thrombosis has typically been with a heparin drip and transition to oral anticoagulants. Thrombolysis has been shown to promote complete clot lysis more often than compared to standard anticoagulant therapy. In addition, venous patency was better maintained. CONCLUSION We feel that the added benefit of short term effects of improved venous patency and long term benefits of less post thrombotic syndrome, catheter based tPA administration and mechanical thrombectomy for thrombus offers an adjuvant treatment in the setting of large clot burden refractory to standard treatment. PMID:24814982

Musielak, Matthew Christopher; Singh, Ranjodh; Hartman, Elizabeth; Bernstein, Joseph

2014-01-01

129

Inferior vena cava filters: what radiologists need to know.  

PubMed

Inferior vena cava (IVC) filters are a controversial mechanical adjunct in the prevention of pulmonary embolism, the most serious result of venous thromboembolism. Despite modern IVC filters being in clinical use for more than 45 years, there is still uncertainty amongst many radiologists about the indications for IVC filter placement and their removal, particularly the more recent prophylactic use in patients without confirmed deep vein thrombosis (DVT) or pulmonary embolism (PE). Recently published guidelines on filter use from the National Institute of Health and Clinical Excellence (NICE) and other professional bodies are discussed. The vast majority of IVC filters in the UK are inserted by interventional radiologists, so radiologists may be the first point of contact for information requested by other clinicians. The increasing use of filters means that radiologists will encounter filters increasingly often during abdominal cross-sectional imaging. Awareness of common filter-related complications, such as tilting, thrombosis, and caval perforation, is useful to reassure or alert other clinicians. The potential role of filters in upper extremity DVT and requirement for concomitant anticoagulation is discussed. PMID:23452875

Harvey, J J; Hopkins, J; McCafferty, I J; Jones, R G

2013-07-01

130

Experimental replacement of the inferior vena cava: factors affecting patency.  

PubMed

To evaluate factors influencing graft patency in the venous system, we replaced the inferior vena cava (IVC) in 50 dogs. Expanded polytetrafluoroethylene ( ePTFE ) grafts with external support were implanted into 32 animals while autogenous, spiral jugular vein grafts were used to replace the IVC in 18 dogs. 111In-labeled autologous platelets and 125I-labeled canine fibrinogen were utilized to evaluate early thrombus formation. A distal arteriovenous (AV) fistula significantly (P less than 0.05) decreased both platelet and fibrin deposition on ePTFE grafts 3 hours following implantation. Patency rate of 12 ePTFE grafts with a temporary AV fistula was higher (75%) than that of grafts without fistula (25%) at 3 months (P less than 0.05). Spiral vein grafts with fistula showed 91% patency at 3 months; without fistula patency was only 67%. Venograms confirmed patency in five grafts followed up to 6 months. Antiplatelet therapy resulted in 100% patency in ePTFE and vein grafts during its administration, and vein grafts maintained patency after discontinuation of antiplatelet treatment. Spiral vein grafts showed no decrease in cross-sectional area at 3 months, while the cross-sectional area of ePTFE grafts decreased significantly (59%). Distal AV fistula decreases platelet and fibrin deposition leading to early occlusion in ePTFE grafts and produces excellent patency in spiral vein grafts. Antiplatelet therapy appears to further improve patency. PMID:6729703

Gloviczki, P; Hollier, L H; Dewanjee, M K; Trastek, V F; Hoffman, E A; Kaye, M P

1984-06-01

131

Compression of the Inferior Vena Cava in Bowel Obstruction  

PubMed Central

Introduction. We investigated whether (a) the inferior vena cava (IVC) is compressed in bowel obstruction and (b) some tracts are more compressed than others. Methods. Two groups of abdominal computed tomography (CT) examinations were collected retrospectively. Group O (N = 69) scans were positive for bowel obstruction, group C (N = 50) scans were negative for diseases. IVC anteroposterior and lateral diameters (APD, LAD) were assessed at seven levels. Results. In group C, IVC section had an elliptic shape (APD/LAD: .76 ± .14), the area of which increased gradually from 1.9 (confluence of the iliac veins) to 3.1?cm2/m2 of BSA (confluence of the hepatic veins) with a significant narrowing in the hepatic section. In group O, bowel obstruction caused a compression of IVC (APD/LAD: .54 ± .17). Along its course, IVC section area increased from 1.3 to 2.5?cm2/m2. At ROC curve analysis, an APD/LAD ratio lower than 0.63 above the confluence of the iliac veins discriminated between O and C groups with sensitivity of 74% and specificity of 96%. Conclusions. Bowel obstruction caused a compression of IVC, which involved its entire course except for the terminal section. APD/LAD ratio may be useful to monitor the degree of compression. PMID:24151603

Cina, Alessandro; Zamparelli, Roberto; Venturino, Sara

2013-01-01

132

Inferior vena cava resection with hepatectomy: challenging but justified  

PubMed Central

Objective The aim of this study was to evaluate the clinical outcome of hepatectomy combined with inferior vena cava (IVC) resection and reconstruction for treatment of invasive liver tumours. Methods From February 1995 to September 2010, 2146 patients underwent liver resections in our hospital's hepatopancreatobiliary unit. Of these, 35 (1.6%) patients underwent hepatectomy with IVC resection. These patients were included in this study. Data were analysed from a prospectively collected database. Results Resections were carried out for colorectal liver metastasis (CRLM) (n = 21), hepatocellular carcinoma (n = 6), cholangiocarcinoma (n = 3) and other conditions (n = 5). Resections were carried out with total vascular occlusion in 34 patients and without in one patient. In situ hypothermic perfusion was performed in 13 patients; the ante situm technique was used in three patients, and ex vivo resection was used in six patients. There were four early deaths from multiple organ failure. Postoperative complications occurred in 14 patients, three of whom required re-operation. Median overall survival was 29 months and cumulative 5-year survival was 37.7%. Rates of 1-, 2- and 5-year survival were 75.9%, 58.7% and 19.6%, respectively, in CRLM patients. Conclusions Aggressive surgical management of liver tumours with IVC involvement offers the only hope for cure in selected patients. Resection by specialist teams affords acceptable perioperative morbidity and mortality rates. PMID:21999594

Malde, Deep J; Khan, Aamir; Prasad, K Rajendra; Toogood, Giles J; Lodge, J Peter A

2011-01-01

133

Factors involved in the antinatriuretic effects of acute constriction of the thoracic and abdominal inferior vena cava.  

NASA Technical Reports Server (NTRS)

Study of the antinatriuretic effect of acute thoracic inferior vena cava (TIVC) constriction in the absence of alterations in renal perfusion pressure. A comparison is made of the effects of equivalent degrees of TIVC and abdominal inferior vena cava constriction on arterial pressure, renal hemodynamics, and electrolyte excretion.

Schrier, R. W.; Humphreys, M. H.

1971-01-01

134

Superior oblique tendon lengthening for acquired superior oblique overactions.  

PubMed Central

Two patients who presented with compensatory head postures and diplopia are described. They both had marked unilateral superior oblique overaction, in one patient due to a large, incomitant skew deviation. Each underwent a superior oblique tendon lengthening procedure using a segment of silicone 240 retinal band as an expander, in combination with a contralateral superior rectus recession. Both achieved an excellent result with an improvement of the compensatory head posture and an increase in the field of binocular single vision. This surgical procedure is proposed as an option in the management of superior oblique overaction, including certain cases of skew deviation. Images PMID:8199114

Manners, R M; O'Flynn, E; Morris, R J

1994-01-01

135

Computed tomography manifestations of common inferior vena cava dysplasia and its clinical significance  

PubMed Central

This study aimed to review and analyse the computed tomography (CT) imaging results of frequently encountered developmental anomalies of the inferior vena cava (IVC). The underlying clinical significance was evaluated with reference to the relevant literature. CT images of patients who received abdominal or thoracic scanning between July 2009 and September 2011 were reviewed. Developmental anomalies observed in the IVC were identified and categorised. Images of the cases with typical anomalies were presented and their developmental mechanism, as well as clinical significance, was discussed. The most frequently encountered IVC developmental anomalies include the left vena cava, double vena cava, azygos continuation of the IVC, left circumaortic renal vein, left retroaortic renal vein and retrocaval ureter. The embryogenesis of the IVC is a complex process that results in various congenital anomalies. The developmental anomalies of the IVC are distinguished using a CT scan and have significant implications on clinical perspective. PMID:23407792

QIAN, ZHEN-YU; YANG, MING-FENG; ZUO, KE-QIANG; CHENG, JIE; XIAO, HONG-BING; DING, WEI-XING

2013-01-01

136

Phaeochromocytoma treated by en bloc resection including the suprarenal caudal vena cava in a dog.  

PubMed

A 10-year-old, neutered male Cairn terrier was examined after experiencing intermittent vomiting of several months' duration and sudden onset of acute depression. Abdominal ultrasound examination revealed an adrenal mass invading the suprarenal part of the caudal vena cava. The vascular invasion could not be corrected so en bloc ligation/excision of the adrenal neoplasm and the suprarenal part of the vena cava was performed. Microscopic examination identified an adrenal phaeochromocytoma. The dog recovered well and had no significant vascular or renal dysfunction at follow-up 20 months after surgery. To the authors' knowledge, this is the first report of a dog surviving long term after resection of the suprarenal caudal vena cava. PMID:16355735

Louvet, A; Lazard, P; Denis, B

2005-12-01

137

Inferior Vena Cava Filter Placement during Pregnancy: An Adjuvant Option When Medical Therapy Fails  

PubMed Central

The authors present a case of a 27-year-old multiparous woman, with multiple thrombophilia, whose pregnancy was complicated with deep venous thrombosis requiring placement of a vena cava filter. At 15th week of gestation, following an acute deep venous thrombosis of the right inferior limb, anticoagulant therapy with low-molecular-weight heparin (LMWH) was instituted without improvement in her clinical status. Subsequently, at 18 weeks of pregnancy, LMWH was switched to warfarin. At 30th week of gestation, the maintenance of high thrombotic risk was the premise for placement of an inferior vena cava filter for prophylaxis of pulmonary embolism during childbirth and postpartum. There were no complications and a vaginal delivery was accomplished at 37 weeks of gestation. Venal placement of inferior vena cava filters is an attractive option as prophylaxis for pulmonary embolism during pregnancy. PMID:23781361

Serrano, Fátima; Torres, Rita; Borges, Augusta

2013-01-01

138

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

139

Canal Superior Online Pas: Portugal  

E-print Network

Canal Superior Online País: Portugal Period.: Diária �mbito: Online Pag.: 1 de 3ID: 44493807 30-10-2012 | Canal Superior Informação Online PROGRAMAS INFORMA��O AGENDA PESQUISA LOGIN/REGISTO EMISS�O INFORMA��O serão os mais afetados perante o cenário de reduções previsto pelo OE 2013. #12;Canal Superior Online

Instituto de Sistemas e Robotica

140

Canal Superior Online Pas: Portugal  

E-print Network

Canal Superior Online País: Portugal Period.: Diária �mbito: Online Pag.: 1 de 3ID: 41197251 10-04-2012 | Canal Superior Informação Online PROGRAMAS INFORMA��O AGENDA LOGIN/REGISTO INFORMA��O NOTÍCIAS» do mundo dos rapazes falou com o Canal Superior. COOLTURA 09/04/2012 12:33 INDIELISBOAREGRESSA

Instituto de Sistemas e Robotica

141

Canal Superior Online Pas: Portugal  

E-print Network

Canal Superior Online País: Portugal Period.: Diária �mbito: Online Pag.: 1 de 3ID: 45533397 07-01-2013 | Canal Superior Informação Online PROGRAMAS INFORMA��O AGENDA PESQUISA LOGIN/REGISTO EMISS�O INFORMA��O:56 LUÍSREBELO: «AS MANIFESTA��EST�M TIDO POUCO OU NENHUM RESULTADO» Numa mini-entrevista ao Canal Superior, com

Instituto de Sistemas e Robotica

142

Canal Superior Online Pas: Portugal  

E-print Network

Canal Superior Online País: Portugal Period.: Diária �mbito: Online Pag.: 1 de 4ID: 40921956 24-03-2012 | Canal Superior Informação Online PROGRAMAS INFORMA��O AGENDA LOGIN/REGISTO INFORMA��O PROGRAMAS DE manifestantes à porta da reitoria. #12;Canal Superior Online País: Portugal Period.: Diária �mbito: Online Pag

Instituto de Sistemas e Robotica

143

Canal Superior Online Pas: Portugal  

E-print Network

Canal Superior Online País: Portugal Period.: Diária �mbito: Online Pag.: 1 de 2ID: 44327911 19-10-2012 | Canal Superior Informação Online PROGRAMAS INFORMA��O AGENDA PESQUISA LOGIN/REGISTO EMISS�O INFORMA��O no topo das preferências da «fuga de cérebros» em Portugal. #12;Canal Superior Online País: Portugal

Instituto de Sistemas e Robotica

144

Design Optimization of Vena Cava Filters: An application to dual filtration devices  

SciTech Connect

Pulmonary embolism (PE) is a significant medical problem that results in over 300,000 fatalities per year. A common preventative treatment for PE is the insertion of a metallic filter into the inferior vena cava that traps thrombi before they reach the lungs. The goal of this work is to use methods of mathematical modeling and design optimization to determine the configuration of trapped thrombi that minimizes the hemodynamic disruption. The resulting configuration has implications for constructing an optimally designed vena cava filter. Computational fluid dynamics is coupled with a nonlinear optimization algorithm to determine the optimal configuration of trapped model thrombus in the inferior vena cava. The location and shape of the thrombus are parameterized, and an objective function, based on wall shear stresses, determines the worthiness of a given configuration. The methods are fully automated and demonstrate the capabilities of a design optimization framework that is broadly applicable. Changes to thrombus location and shape alter the velocity contours and wall shear stress profiles significantly. For vena cava filters that trap two thrombi simultaneously, the undesirable flow dynamics past one thrombus can be mitigated by leveraging the flow past the other thrombus. Streamlining the shape of thrombus trapped along the cava wall reduces the disruption to the flow, but increases the area exposed to abnormal wall shear stress. Computer-based design optimization is a useful tool for developing vena cava filters. Characterizing and parameterizing the design requirements and constraints is essential for constructing devices that address clinical complications. In addition, formulating a well-defined objective function that quantifies clinical risks and benefits is needed for designing devices that are clinically viable.

Singer, M A; Wang, S L; Diachin, D P

2009-12-03

145

Fucoidans from brown seaweeds Sargassum hornery, Eclonia cava, Costaria costata: structural characteristics and anticancer activity.  

PubMed

Fucoidans were isolated by water extraction and ion-exchange chromatography from brown algae Eclonia cava, Sargassum hornery, and Costaria costata collected near of Korean coasts. The structures of fucoidans were investigated. Fucoidan from E. cava was mixture of sulfated rhamnogalactofucan and galactofucan. Fucoidan from C. costata was a sulfated galactofucan. Fucoidan isolated from S. hornery was separated into three fractions: a homofucan sulfate, a homofucan but without sulfate groups, and a sulfated rhamnofucan. The results clearly showed that fucoidans play an inhibitory role in colony formation in human melanoma and colon cancer cells and may be effective antitumor agents. PMID:21302149

Ermakova, Svetlana; Sokolova, Roza; Kim, Sang-Min; Um, Byung-Hun; Isakov, Vladimir; Zvyagintseva, Tatyana

2011-07-01

146

Aspiration thrombectomy in a patient with suprarenal inferior vena cava thrombosis.  

PubMed

DVT has rarely been observed in the inferior vena cava (IVC). Pulmonary embolism (PE), which can be life-threatening, often occurred in patients with IVC thrombosis. Therefore, an IVC filter is frequently used in those patients for the prevention of PE. A case of successful endovascular treatment of an IVC thrombus in a patient with relative contraindications to implantation of an IVC filter is presented. This case report shows that aspiration of thrombi caught in the removable IVC filter may be an alternative to surgery in high-risk patients with catheter-related suprarenal inferior vena cava thrombosis. PMID:25692046

Kishima, Hideyuki; Fukunaga, Masashi; Nishian, Kunihiko; Saita, Ten; Horimatsu, Tetsuo; Sugahara, Masataka; Mine, Takanao; Masuyama, Tohru

2015-01-01

147

Aspiration Thrombectomy in a Patient with Suprarenal Inferior Vena Cava Thrombosis  

PubMed Central

DVT has rarely been observed in the inferior vena cava (IVC). Pulmonary embolism (PE), which can be life-threatening, often occurred in patients with IVC thrombosis. Therefore, an IVC filter is frequently used in those patients for the prevention of PE. A case of successful endovascular treatment of an IVC thrombus in a patient with relative contraindications to implantation of an IVC filter is presented. This case report shows that aspiration of thrombi caught in the removable IVC filter may be an alternative to surgery in high-risk patients with catheter-related suprarenal inferior vena cava thrombosis. PMID:25692046

Kishima, Hideyuki; Fukunaga, Masashi; Nishian, Kunihiko; Saita, Ten; Horimatsu, Tetsuo; Sugahara, Masataka; Mine, Takanao; Masuyama, Tohru

2015-01-01

148

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

149

Thermoregulatory catheter-associated inferior vena cava thrombus.  

PubMed

The use of thermoregulatory catheters (TRCs) in critically ill patients has become increasingly popular. TRCs have been shown to be effective in regulating patient body temperature with improved outcomes. Critically ill patients, especially multitrauma patients and those with femoral catheters, are at high risk for deep vein thrombosis (DVT). Among patients for whom chemical DVT prophylaxis is not an option, inferior vena cava (IVC) filters are often placed prophylactically. The development of intravascular ultrasound (IVUS) has allowed placement of IVC filters at the bedside for patients who are too ill for transport to the operating room or cardiac catheterization lab. After encountering several patients with occult DVT of the IVC during bedside IVC filter placement, we performed a retrospective review to determine the incidence of DVT or pulmonary embolus (PE) in patients who had been treated with a TRC at Baylor University Medical Center at Dallas. Since 2008, IVC filters have been deployed at the bedside with the use of IVUS at Baylor University Medical Center. During that same time period, 83 patients had a TRC placed for either intravascular warming or cooling during their resuscitation. Forty-seven out of 83 patients who had a TRC placed survived their injuries. Ten of 47 patients (21%) were diagnosed with DVT or PE, and 6 of these 10 (60%) were found to have caval thrombus. We present this case series as evidence that undiagnosed IVC thrombus associated with TRCs may be higher than previously suspected, given that 5 out of 10 patients who had IVUS of their IVC for prophylactic IVC filter placement, as well as one patient diagnosed with PE, were found to have caval thrombus. PMID:23543961

Gierman, Joshua L; Shutze, William P; Pearl, Gregory J; Foreman, Michael L; Hohmann, Stephen E; Shutze, William P

2013-04-01

150

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

151

Ryanodine receptors are uncoupled from contraction in rat vena cava  

PubMed Central

Ryanodine receptors (RyR) are Ca2+-sensitive ion channels in the sarcoplasmic reticulum (SR) membrane, and are important effectors of SR Ca2+ release and smooth muscle excitation–contraction coupling. While the relationship between RyR activation and contraction is well characterized in arteries, little is known about the role of RyR in excitation–contraction coupling in veins. We hypothesized that RyR are present and directly coupled to contraction in rat aorta (RA) and vena cava (RVC). RA and RVC expressed mRNA for all 3 RyR subtypes, and immunofluorescence showed RyR protein was present in RA and RVC smooth muscle cells. RA and RVC rings contracted when Ca2+ was re-introduced after stores depletion with thapsigargin (1 ?M), indicating both tissues contained intracellular Ca2+ stores. To assess RyR function, contraction was then measured in RA and RVC exposed to the RyR activator caffeine (20 mM). In RA, caffeine caused contraction that was attenuated by the RyR antagonists ryanodine (10 ?M) and tetracaine (100 ?M). However, caffeine (20 mM) did not contract RVC. We next measured contraction and intracellular Ca2+ (Ca2+i) simultaneously in RA and RVC exposed to caffeine. While caffeine increased Ca2+i and contracted RA, it had no significant effect on Ca2+i or contraction in RVC. These data suggest that ryanodine receptors, while present in both RA and RVC, are inactive and uncoupled from Ca2+ release and contraction in RVC. PMID:23177664

Tykocki, N.R.; Thompson, J.M.; Jackson, W.F.; Watts, S.W.

2014-01-01

152

Superior Sagittal Sinus Thrombosis  

PubMed Central

Sinus-vein thrombosis is increasingly recognized as a much more frequent neurological disorder than was anticipated before. We examined the pathophysiology of superior sagittal sinus thrombosis (SSST) from 19 patients and a rat SSST model. We treated 19 cases with SSST who were diagnosed by angiography. The symptoms of nine patients, who suffered multiple intracerebral hemorrhage, were abrupt. In another ten patients who recovered satisfactorily, the condition progressed slowly and they were treated with heparin and urokinase. Multivariate analysis demonstrated that female, sudden onset (<24 hours) and posterior 1/3 occlusion are related to bad outcome. Experimentally, SSST was induced by ligation and slow injection of kaolin-cephalin suspension into SSS in rats. Regional cerebral blood flow (rCBF) and tissue hemoglobin oxygen saturation (Hb Sao2) using a “scanning” technique were measured at 48 locations, and fluorescence angiography was performed before and until 90 min after SSST induction. After 48 hours the animals were sacrificed for histological studies. Decrease of rCBF and tissue Hb SO2 and brain damage were seen in group B (n = 10) with an extension of thrombosis from SSS into cortical veins. Brain injury was not observed in group A (n = 8) with SSS thrombus alone and sham-operated animals (n = 5). In conclusion, a brain with acute extension of thrombus from SSS into cortical veins becomes critical for cerebral blood supply and metabolism. CBF, tissue HbSO2 and repeated angiography can be helpful monitors for the early detection of critical conditions after SSST. As to the therapy, restraint on the ongoing thrombus is essential to protect the brain with SSST, and we encourage the use of combination therapy of heparin and urokinase as early as possible in cases without intracerebral hemorrhage. ImagesFigure 1Figure 2 PMID:17171061

Nakase, Hiroyuki; Takeshima, Toshikazu; Sakaki, Toshisuke; Heimann, Axel; Kempski, Oliver

1998-01-01

153

Acute Traumatic Renal Artery to Inferior Vena Cava Fistula Treated with a Covered Stent  

SciTech Connect

A 34-year-old man presented within hours of suffering a penetrating stab wound and was diagnosed with a right renal artery to inferior vena cava fistula. Initial attempts at excluding the fistula with a balloon were unsuccessful. He was subsequently treated with a covered stent inserted into the right renal artery which successfully excluded the fistula.

Tam, J. [Alfred Hospital, Department of Radiology (Australia); Kossman, T. [Alfred Hospital, Department of Trauma (Australia); Lyon, S. [Alfred Hospital, Department of Radiology (Australia)], E-mail: lyonsey@optusnet.com.au

2006-12-15

154

A Rare Case of Retrocaval Ureter Associated with Persistent Left Vena cava  

Microsoft Academic Search

We report a rare case of a retrocaval ureter associated with a left inferior vena cava transposition and with concomitant nephrolithiasis in a young woman already surgically treated during her first years of life for cardiovascular disease. Diagnosis and surgical procedure are described, including the use of a flexible ureterorenoscope to facilitate kidney stone removal.

V. Gramegna; A. Madaro; F. Pellegrini; S. Capizzi; O. Romano; D. Massari; G. Liessi

2003-01-01

155

Intracardiac migration of nitinol TrapEase™ vena cava filter and paradoxical embolism  

Microsoft Academic Search

The nitinol TrapEase™ inferior vena cava filter is a new device for pulmonary embolism prophylaxis. No cases of filter migration or filter-related complications with this type of device have so far been described. We report a case of intracardiac migration of this filter in a patient with a patent foramen ovale, resulting in severe cardiogenic shock, cerebral and right arm

Massimo Porcellini; Paolo Stassano; Antonino Musumeci; Giancarlo Bracale

2002-01-01

156

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

157

Intracardiac embolization of inferior vena cava filter associated with right atrium perforation and cardiac tamponade  

PubMed Central

Insertion of inferior vena cava filters has been well established in literature, reducing occurrence of pulmonary embolism after an episode of deep venous thrombosis in patients with contraindication to anticoagulation. There are a small number of complications related to procedure and embolization is rare. In this context, we described a case of intracardiac embolization associated with cardiac tamponade. PMID:25140481

Soeiro, Alexandre de Matos; Fernandes, Felipe Lourenço; Teixeira, Rafael Plens; Nicz, Pedro Felipe Gomez; Soeiro, Maria Carolina Feres de Almeida; Serrano Jr., Carlos V.; de Oliveira Jr., Múcio Tavares

2014-01-01

158

C Zilberberg M Maldonado AM Sole -Cava Assessment of the relative contribution of asexual propagation  

E-print Network

NOTE C Zilberberg � M Maldonado � AM Sole´ -Cava Assessment of the relative contribution of asexual facilitates the asexual propagation of this sponge and in turn favors the spread of the most aggressive sponge to the pattern expected for fragmenting species, the incidence of clonality and asexual propaga- tion

Solé-Cava, Antonio M.

159

Inferior vena cava filter penetration resulting in renal pelvis rupture with urinoma formation.  

PubMed

Inferior vena cava (IVC) filter penetration is common and most often asymptomatic. However, penetration may potentially result in a variety of complications, including aortic trauma and small bowel perforation. Described is a case of IVC filter penetration resulting in renal pelvis perforation with urinoma formation. PMID:23129578

Kassis, Christine; Kalva, Sanjeeva P

2013-01-01

160

Procedural and indwelling complications with inferior vena cava filters: frequency, etiology, and management.  

PubMed

Inferior vena cava (IVC) filters are commonly used in select high-risk patients for the prevention of pulmonary embolism. Potentially serious complications can arise from the use of IVC filters, including thrombosis of the filter itself and filter fragment embolization. This article discusses the utility of IVC filters and reviews the management of two cases of filter-related complications. PMID:25762846

Milovanovic, Lazar; Kennedy, Sean A; Midia, Mehran

2015-03-01

161

A Critical Analysis of Surgery for Kidney Cancer with Vena Cava Invasion  

Microsoft Academic Search

ObjectivePatients with kidney cancer with venous system involvement are at high risk of cancer recurrence even after the tumor thrombus is successfully removed. This review analyzes the impact on prognosis of the level of involvement of the inferior vena cava (IVC) in renal cell carcinoma (RCC).

Ziya Kirkali; Hein Van Poppel

2007-01-01

162

Long-term follow-up of Greenfield inferior vena cava filter placement in children  

Microsoft Academic Search

Objective: The long-term results of Greenfield inferior vena cava (IVC) filter placement have been well documented in adults; however, similar data do not exist for pediatric patients. The potential for growth and the increased life expectancy in younger patients may contribute to a difference in the natural history of filters placed in children. The objective of this study was to

Mitchell D. Cahn; Michael J. Rohrer; Mary Beth Martella; Bruce S. Cutler

2001-01-01

163

Duplication of the inferior vena cava and thrombosis: A rare case  

PubMed Central

Duplication of inferior vena cava (IVC) is a rare finding in radiologic studies and its coincidence with thrombosis is even rarer. Here we described a rare case with duplication of IVC and symptomatic venous thrombosis of her lower extrimity. PMID:24497866

Tamizifar, Babak; Seilani, Parisa; Zadeh, Maryam Rismankar

2013-01-01

164

Retrieval of Cement Embolus from Inferior Vena Cava After Percutaneous Vertebroplasty  

Microsoft Academic Search

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.

S. Athreya; N. Mathias; P. Rogers; R. Edwards

2009-01-01

165

Vacuum-assisted inferior vena cava thrombus removal using a percutaneous technique.  

PubMed

We report a patient with a massive inferior vena cava (IVC) thrombus requiring immediate intervention. The patient underwent successful thrombectomy using a percutaneous catheter aspiration system. Percutaneous removal of an IVC thrombus is a safe and effective treatment option for severely ill patients. doi: 10.1111/jocs.12366 (J Card Surg 2015;30:265-267). PMID:24862173

Wilner, Bryan R; Carrillo, Roger G

2015-03-01

166

Complex Adaptive System of Systems (CASoS) Engineering Initiative  

E-print Network

Complex Adaptive System of Systems (CASoS) Engineering Initiative http://www.sandia.gov/CasosEngineering/ SAND 2011-3354 P Complex Adaptive Systems of Systems (CASoS) E i i M i A i ti t P bl Alexander V. Outkin Aldo A. Zagonel Eighth International Conference on Complex Systems Quincy, MA June 26

167

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

168

Results From the TICO-CAVA Land Seismic Refraction Survey  

NASA Astrophysics Data System (ADS)

Project TICO-CAVA (Transects to Investigate the Crustal Origin of the Central American Volcanic Arc) is a key part of the MARGINS Subduction Factory initiative to quantify, characterize, and understand the volcanic crust produced in Costa Rica by seismically imaging its volume, extent, seismic properties, and lateral variability. From this information we hope to estimate the major-element composition of the arc crust and draw inferences about the processes controlling volcanic output of the subduction factory in Central America. We will do this with two intimately linked seismic surveys, an onshore explosion refraction survey (2005), and an onshore-offshore airgun survey (2008). Here we present results from Phase I of the project, an onshore explosion seismic refraction survey of the volcanic arc and look forward to phase II, a large onshore-offshore seismic survey in both the Atlantic and Pacific oceans. We acquired seismic refraction/wide-angle reflection data on two lines. Line 1 is 154 km long from the Pacific Ocean to the Caribbean Sea in central Costa Rica, intersecting the main volcanic arc at Volcán Barva. Line 2 is 280 km long and spans the entire length of the active arc in Costa Rica, from north of Volcán OrosÃÆ'í near the Nicaraguan border, to south of Volcán IrazÃÆ'ú. 748 seismometers were deployed on each transect, resulting in a ~200 m receiver spacing on Line 1 and ~370 m spacing on Line 2. Data quality ranges from fair to excellent. Data on the cross-arc line (Line 1) show upper-crustal refractions that can be tracked from coast to coast and, at the longest offsets, deep reflections that may be Moho reflections. Sediments on the Atlantic coastal plain (2-3 km/s) are about 1.5 km thick; beneath this and beneath the volcanic arc is a low-velocity carapace of volcanic material (3-5 km/s) that is 2-4 km thick. Beneath the low-velocity velocities reach 6.0-6.4 km/s at 5-10 km depth. Deeper structure will become better resolved as analysis continues and the onshore-offshore data are collected. The along-arc line (Line 2) shows evidence for distinctly different crustal structure beneath the Guanacaste volcanos and the Cordillera Central. In addition, low-velocity zones that may represent magma chambers exist beneath Poás volcano and between Irazu and Turrialba volcanoes.

Bullock, A. D.; Holbrook, W. S.; Lizarralde, D.; van Avendonk, H.; Mora, M. M.; Harder, S.; Alvarado, G.

2007-12-01

169

Medical Technology for Superior Patient  

E-print Network

Trusted Medical Technology for Superior Patient Care Technical Services Partnership ­ Comprehensive healthcare technology management and services Technical Services Partnership (TSP) helps healthcare throughout the life cycle Keeping up with the rapid advances in health care technology is a complex

Hayden, Nancy J.

170

Dysgenesis of the inferior vena cava associated with deep venous thrombosis and a partial Protein C deficiency  

PubMed Central

Dysgenesis of the inferior vena cava is rare but it is being increasingly diagnosed by cross-sectional imaging techniques. Patients are usually asymptomatic with abnormalities detected incidentally. An 11 year old boy presented with a 10 day history of fever, vomiting and abdominal pain, which progressed to his back and lower limbs. Magnetic resonance imaging, computerised tomography and Doppler ultrasonography showed the absence of a suprarenal inferior vena cava with bilateral superficial femoral vein thrombi extending cranially to the end of the aberrant inferior vena cava. Haematological testing revealed a partial Protein C deficiency. The presenting clinical picture in this case is unique within the English literature and highlights that deep venous thrombosis associated with inferior vena cava dysgenesis may not present with typical symptoms in children. Early use of advanced imaging modalities would expedite diagnosis and subsequent treatment. PMID:24421930

Tribe, Howard; Borgstein, Rudi

2013-01-01

171

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

172

Computed tomography angiography of situs inversus, portosystemic shunt and multiple vena cava anomalies in a dog.  

PubMed

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

2013-11-01

173

Hepatocellular carcinoma with extension to the heart via the inferior vena cava  

PubMed Central

Hepatocellular carcinoma (HCC) is the third-leading cause of cancer-related mortality worldwide. Most cases of HCC are associated with cirrhosis from various causes such as alcohol or viral hepatitis. Most patients are symptomatic as a result of cirrhosis itself or secondary to tumor extension. These tumors have an affinity for the vasculature and often invade the portal system. HCC rarely causes invasion of the inferior vena cava or the heart. We, however, present a case of HCC in a patient without cirrhosis who remained asymptomatic despite having tumor extension to the heart by way of the inferior vena cava. The mean survival in patients with intracardiac extension with or without aggressive treatment or intervention is approximately 4 months, but our patient greatly exceeded survival expectations after treatment with sorafenib. PMID:25829663

Lewis, Brian

2015-01-01

174

Entrapment of guide wire in an inferior vena cava filter: a technique for removal.  

PubMed

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. PMID:22526100

Abdel-Aal, Ahmed Kamel; Saddekni, Souheil; Hamed, Maysoon Farouk; Fitzpatrick, Farley

2013-04-01

175

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

176

An interesting anatomic variant of inferior vena cava duplication: case report and review of the literature.  

PubMed

Congenital anomalies of the inferior vena cava (IVC) occur in roughly 4% of the population. We report an interesting case of an atypical variant of duplicated IVC. A 20-year-old man presented with orthopedic injuries and intracranial hemorrhage following a motorcycle accident. He was taken to the fluoroscopy suite for IVC filter placement; duplication of the IVC was noted. The right and left iliac veins shared a normal confluence but two IVCs drained independently into renal veins before reuniting into a single structure. Both IVC filters were placed via a single puncture in the groin. We performed a search of the PubMed database using‘ inferior vena cava duplication’ and reviewed common anomalies of the IVC. Several variants of duplicated IVC exist; the most common of which is two distinct IVCs that arise from each iliac vein without a normal confluence. Our patient had a unique anomaly which allowed filter placements from a single puncture. PMID:23518845

Pineda, Danielle; Moudgill, Neil; Eisenberg, Joshua; DiMuzio, Paul; Rao, Atul

2013-06-01

177

The iatrogenic injury of double vena cava due to misdiagnosis during the radical nephroureterectomy and cystectomy.  

PubMed

Double inferior vena cava (d-IVC) is a subtype of vascular anomaly that rarely needs treatment. Here, we present a rare case of d-IVC accompanied with concurrent renal pelvis and bladder carcinoma. Due to misdiagnosis, the anomalous left inferior vena cava (IVC) entering the left renal vein was mistaken as the gonadal vein and was then severed during the radical nephroureterectomy. Fortunately, the injured left IVC was recognized correctly during the following cystectomy. The vascular reconstruction operation was performed to recanalize the left iliac veins by anastomosing the ligated vascular stump to the right IVC in an 'end-to-side' way. During the hospitalization, the patient was treated with 'low molecular weight heparin' and then warfarin to ensure an ideal international normalized ratio. He recovered well from the surgery. A meticulous and comprehensive analysis of radiographic imaging is critical to avoid misdiagnosis of d-IVC. PMID:25778042

Mao, Ye-Qing; Zhu, Shao-Xing; Zhang, Wei

2015-12-01

178

Repeated hepatic resection combined with inferior vena cava replacement: Case report and review of literature  

PubMed Central

INTRODUCTION Advanced tumors of the liver involving the inferior vena cava (IVC) have always been considered a contraindication to surgery. PRESENTATION OF CASE We report a case of a patient, who previously underwent right hepatectomy, with recurrence of colorectal liver metastasis invading the IVC. The patient had a liver resection together with replacement of the vena cava using a ringed polytetrafluoroethylene (PTFE) graft tube. The operation was carried out in hepatic vascular exclusion (HVE) without the use of veno-venous bypass. The patient was healthy and tumor-free at 6 months post-surgery. DISCUSSION In patients with hepatic malignancy involving the IVC, extended hepatic resection and reconstruction of the IVC is often the prerequisite to obtaining a resection margin. CONCLUSION Extended hepatic resection with IVC reconstruction for hepatic malignancy may offer a chance of cure to selected patients who otherwise have poor survival rates. PMID:25528040

Guerrini, Gian Piero; Soliani, Paolo

2014-01-01

179

Long-term results of the Simon nitinol inferior vena cava filter  

Microsoft Academic Search

.   The aim of this study was to evaluate the clinical efficacy, mechanical stability, and safety of the Simon nitinol inferior\\u000a vena cava filter (SNF). The SNF was inserted in 114 consecutive patients at two institutions for prophylaxis of pulmonary\\u000a embolism (PE). Clinical follow-up data were obtained retrospectively on all patients, and 38 patients underwent a dedicated\\u000a radiologic follow-up protocol

P. A. Poletti; C. D. Becker; L. Prina; P. Ruijs; H. Bounameaux; D. Didier; P. A. Schneider; F. Terrier

1998-01-01

180

Aggressive renal angiomyolipoma extending into the renal vein and inferior vena cava - an uncommon entity.  

PubMed

Renal angiomyolipoma is recognised as a benign hamartomatous lesion with no obvious malignant potential. However, the tumour may show extrarenal/perinephric extension at times. Rarely, the lesion may extend into the renal vein and inferior vena cava (IVC) indicating aggressive behaviour. We present a case of an angiomyolipoma of the kidney with sonographic, CT and MRI evidence of extension into the renal vein and IVC. PMID:21750135

Bakshi, S S; Vishal, K; Kalia, V; Gill, J S

2011-08-01

181

Sulfated polysaccharide purified from Ecklonia cava accelerates antithrombin III-mediated plasma proteinase inhibition  

Microsoft Academic Search

Surface plasmon resonance is an important technique for studying molecular interactions and was used to investigate the molecular\\u000a interaction of anticoagulant sulfated polysaccharides purified from an enzymatic hydrolysate of the brown alga Ecklonia cava (ECA) with blood coagulation factors. In a direct binding assay, binding affinity between ECA\\/antithrombin III (ATIII) and\\u000a activated blood coagulation factors was in the order: factor

Won-Kyo Jung; Yasantha Athukorala; Young-Jae Lee; Seon Heui Cha; Chi-Ho Lee; Thava Vasanthan; Kwang-Sik Choi; Sang-Ho Yoo; Se-Kwon Kim; You-Jin Jeon

2007-01-01

182

Inferior vena cava clip migration: unusual cause of duodenal foreign body.  

PubMed

Before the development of the inferior vena cava (IVC) filter, various techniques of IVC interruption were described for the management of patients at high risk for thromboembolic events, and for whom anticoagulation was either inadequate or contraindicated. In this report, we describe the enteric migration of a Miles IVC clip, occurring 27 years after IVC interruption. This previously undescribed complication and the patient's prolonged follow-up period render this case of significant interest. PMID:22981011

Antonoff, Mara B; Beilman, Gregory J

2012-11-01

183

Endovascular removal of a permanent "TrapEase" inferior vena cava filter.  

PubMed

Inferior vena cava (IVC) filter placement has seen a rising trend over the past decade. Although effective in the prevention of future pulmonary emboli, filters are associated with several long-term complications including deep venous thrombosis, filter migration, filter fracture, and caval thrombosis. The IVC filters have evolved over the years to minimize these unwarranted sequelae. We describe a technique to remove a permanent IVC filter in a patient who no longer required mechanical protection. PMID:23645394

Yallampalli, Sasidhar; Irani, Zubin; Kalva, Sanjeeva P

2013-07-01

184

Inferior vena cava filter strut perforation discovered during right robotic-assisted laparoscopic partial nephrectomy.  

PubMed

Inferior vena cava (IVC) filters are a relatively safe and effective treatment designed to prevent pulmonary emboli. Late complications of IVC filters include filter migration, tilting, strut fracture, strut perforation, and IVC thrombosis. We present a case of a 67-year-old male undergoing a right robotic-assisted laparoscopic partial nephrectomy whose IVC filter strut had perforated the vena caval wall. PMID:22014963

Kappa, Stephen F; Morgan, Todd M; Keegan, Kirk A; Cookson, Michael S

2012-04-01

185

Retrieval of a wall-embedded recovery inferior vena cava filter using rigid bronchoscopy forceps.  

PubMed

Optional inferior vena cava (IVC) filters are an attractive option to help prevent pulmonary embolism because these filters can be retrieved when the risk for thromboembolic events has passed. Retrieval of IVC filters can be difficult if the filter tilts and its tip becomes embedded into the wall of the IVC. A case is presented in which rigid bronchoscopy forceps were used to retrieve a filter that had become embedded in the wall of the IVC. PMID:21326730

White, Sarah B; Stavropoulos, S William

2007-03-01

186

The Prophylactic Use of Inferior Vena Cava Filters in Patients Undergoing High-Risk Spinal Surgery  

Microsoft Academic Search

Prophylactic inferior vena cava filter (IVCF) placement is advocated in some high-risk groups. We sought data regarding safety and efficacy for prophylactic IVCF placement in patients at high risk for venous thromboembolism (VTE) following major spinal reconstruction. Seventy-four spine surgery patients with contraindication to anticoagulation (44 females, 30 males; mean age 56.2) received prophylactic IVCFs. Criteria were (1) history of

Luis Leon; Heron Rodriguez; Rabih G. Tawk; Stephen L. Ondra; Nicos Labropoulos; Mark D. Morasch

2005-01-01

187

Renal transplantation in children with thrombosis of the inferior vena cava requires careful assessment and planning  

Microsoft Academic Search

Children with end-stage renal disease and inferior vena cava (IVC) thrombosis are rare, and their condition is complex and\\u000a high risk for renal transplantation. Detailed imaging studies of the recipient’s abdominal vasculature should be carried out\\u000a prior to transplantation, followed by careful pre-operative joint planning by the pediatric transplant surgeon and nephrologist.\\u000a Critical decisions need to be made as to

Oscar Salvatierra Jr; Waldo Concepcion; Minnie M. Sarwal

2008-01-01

188

Value-added fermentation of Ecklonia cava processing by-product and its antioxidant effect  

Microsoft Academic Search

The interest in the extraction of polyphenolic compounds from plant materials is focused on upgrading of the large amount\\u000a of by-products coming from food or cosmetics industries from which the press residues have particularly high contents of phenolics.\\u000a In this study, for value-added use of the brown seaweed Ecklonia cava processing by-product (ECPB), which can be obtained after polyphenolic extraction

W. A. J. P. Wijesinghe; Lee Won-Woo; Kim Young-Mog; Kim Young-Tae; Kim Se-Kwon; Jeon Byong-Tae; Kim Jin-Soo; Heu Min-Soo; Jung Won-Kyo; Ginnae Ahn; Ki-Wan Lee; You-Jin Jeon

189

Retrieval of Cement Embolus from Inferior Vena Cava After Percutaneous Vertebroplasty  

Microsoft Academic Search

Percutaneous vertebroplasty is an accepted treatment for painful vertebral compression fractures caused by osteoporosis and\\u000a malignant disease. Venous leakage of cement and pulmonary cement embolism have been reported complications. We describe a\\u000a paravertebral venous cement leak resulting in the deposition of a cement cast in the inferior vena cava and successful retrieval\\u000a of the cement embolus.

S. Athreya; N. Mathias; P. Rogers; R. Edwards

2009-01-01

190

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

191

Combined resection of the pancreas and inferior vena cava for pancreatic metastasis from renal cell carcinoma.  

PubMed

Indications for pancreatic resections for metastatic disease have not yet been defined to date, and few guidelines exist for the management of these lesions. However, most authors recommend surgery as the treatment of choice for pancreatic metastasis (PM). Resection of the inferior vena cava (IVC) is rarely done during removal of peripancreatic cancer. This report presents the first case of metachronous PM from renal cell carcinoma (RCC) with IVC involvement successfully treated by en-bloc resection in a 70-year-old asymptomatic woman. The abdominal computed tomography (CT) scan showed a 4.0-cm mass in the tail and a 5.0-cm mass in the head of the pancreas with a suspected involvement of vena cava. An en-bloc total pancreatectomy was performed with excision of the involved portion of the cava vein. Histology confirmed the presence of two metastases from RCC with neoplastic infiltration of the IVC and without lymph node involvement. All surgical margins were tumor-free. At most recent follow-up 12 months after pancreatectomy, the patient has no evidence of disease. We believe that a multidisciplinary approach and careful evaluation and treatment of these patients is a mandatory component for patient selection. IVC resection should be performed only when a margin-negative resection is expected to be achieved. PMID:17805935

Tuech, J J; Lefebure, B; Bridoux, V; Albouy, B; Lermite, E; Le Pessot, F; Le Blanc-Louvry, I; Michot, F

2008-03-01

192

Safety and Efficacy of the Gunther Tulip Retrievable Vena Cava Filter: Midterm Outcomes  

SciTech Connect

PurposeTo evaluate of the medium-term integrity, efficacy, and complication rate associated with the Gunther Tulip vena cava filter.MethodsA retrospective study was performed of 369 consecutive patients who had infrarenal Gunther Tulip inferior vena cava filters placed over a 5-year period. The mean patient age was 61.8 years, and 59 % were men. Venous thromboembolic disease and a contraindication to or complication of anticoagulation were the indications for filter placement in 86 % of patients; 14 % were placed for prophylaxis in patients with a mean of 2.3 risk factors. Follow-up was obtained by review of medical and radiologic records.ResultsMean clinical follow-up was 780 days. New or recurrent pulmonary embolus occurred in 12 patients (3.3 %). New or recurrent deep-vein thrombosis occurred in 53 patients (14.4 %). There were no symptomatic fractures, migrations, or caval perforations. Imaging follow-up in 287 patients (77.8 %) at a mean of 731 days revealed a single (0.3 %) asymptomatic fracture, migration greater than 2 cm in 36 patients (12.5 %), and no case of embolization. Of 122 patients with CT scans, asymptomatic perforations were identified in 53 patients (43.4 %) at a mean 757 days.ConclusionThe Gunther Tulip filter was safe and effective at 2-year follow-up. Complication rates were similar to those reported for permanent inferior vena cava filters.

Hoffer, Eric K., E-mail: eric.k.hoffer@hitchcock.org; Mueller, Rebecca J.; Luciano, Marcus R.; Lee, Nicole N.; Michaels, Anne T.; Gemery, John M. [Dartmouth-Hitchcock Medical Center, Department of Radiology, Section of Vascular and Interventional Radiology (United States)

2013-08-01

193

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

194

A novel deployment design of vena cava filters might be the solution to their blockage problem.  

PubMed

The blockage of a vena cava filter (VCF) by the captured blood clots presents a serious problem to the patients. Commercially available cone-shaped VCFs such as the Gunther Tulip filter has an inherent structural flaw that leads the captured blood clots to be trapped in their front spire areas where the flow-induced shear stress is relatively low so that the clots cannot dissolve fast enough and will accumulate, gradually block the central passages of the filters. It is well known that for a Hagen-Poiseuille flow in a circular tube, the flow-induced shear stress is highest at the wall of the tube and lowest along its axis. Herein, we hypothesize that by reversely deploying a cone-shaped filter in the vena cava, the filter's blockage problem might be prevented. First of all, this kind of deployment scenario can force the captured blood clots to stay in the peripheral areas of the vena cava and keep the central passage of the filter unblocked. Secondly, this scenario can expose the captured blood clots to relatively high shear stress that may dissolve the clots faster. PMID:21903340

Chen, Zengsheng; Fan, Yubo; Deng, Xiaoyan

2011-12-01

195

Comparison of Ecklonia cava, Ecklonia stolonifera and Eisenia bicyclis for phlorotannin extraction.  

PubMed

Phlorotannins are polyphenols of marine algae, particularly brown seaweed, having multiple biological activities. A reverse phase-high performance liquid chromatography method was developed for rapid and routine quantification of two major phlorotannins, dieckol and phlorofucofuroeckol-A (PFE-A), from boiling water- and organic solvent-extracts of brown seaweeds Ecklonia cava, E. stolonifera and Eisenia bicyclis. The regression equations for dieckol and PFE-A were as follows: the concentration (mg ml(-1)) = 16.56 x peak height (cm) + 0.44, and the concentration = 20.60 x peak height (cm) + 0.11, with correlation coefficients of 0.996 and 0.999, respectively. Compared to organic solvent extraction, the recovery yield of dieckol from boiling water extracts of E. cava, E. stolonifera and E. bicyclis was 86%, 93%, and 98%, respectively. The recovery yield of PFE-A was 74%, 86% and 62%, respectively. Antioxidant activity was detected in each E. bicyclis water extract (91%), followed by E. stolonifera (90%) and E. cava (74%). Dieckol and PFE-A showed almost 9- and 7-fold stronger antioxidant activity than the standard butylhydroxytoluene, and 6-and 4-fold greater than L-ascorbic acid in molar concentration, respectively. PMID:25004758

Chowdhury, Muhammad Tanvir Hossain; Bangoura, Issa; Kang, Ji-Young; Cho, Ji Young; Joo, Jin; Choi, Yoo Seong; Hwang, Dong Soo; Hong, Yong-Ki

2014-07-01

196

Writing superiority in cued recall.  

PubMed

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

197

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

198

A rare presentation of the double inferior vena cava with an anomalous retrocaval right ureter: embryogenesis and clinical implications.  

PubMed

On dissection of the abdomen of an adult male cadaver, in addition to the normal inferior vena cava on the right side, an unusual venous channel which connected the left renal vein with the left common iliac vein was found; (probably the left inferior vena cava). The left testicular and the left suprarenal veins were opening into the left renal vein as usual. Other than this, a retrocaval ureter was found on the right side. The works of previous authors have highlighted the incidence of a venacaval duplication and its surgical implications, but here, we are presenting a unique case of a double inferior vena cava with an anomalous retrocaval ureter. A conglomeration of such vascular malformations is of immense surgical importance, and it is indicative of a grossly defective angiogenesis. Keeping in mind the clinical relevance of the variations which were observed, an attempt was made to explain them in the light of the embryogenic development. PMID:23634409

Gupta, Pratibha; Khullar, Meenakshi; Sharma, Ravikant; Singh, Richhpal

2013-03-01

199

A Rare Presentation of the Double Inferior Vena Cava with an Anomalous Retrocaval Right Ureter: Embryogenesis and Clinical Implications  

PubMed Central

On dissection of the abdomen of an adult male cadaver, in addition to the normal inferior vena cava on the right side, an unusual venous channel which connected the left renal vein with the left common iliac vein was found; (probably the left inferior vena cava). The left testicular and the left suprarenal veins were opening into the left renal vein as usual. Other than this, a retrocaval ureter was found on the right side. The works of previous authors have highlighted the incidence of a venacaval duplication and its surgical implications, but here, we are presenting a unique case of a double inferior vena cava with an anomalous retrocaval ureter. A conglomeration of such vascular malformations is of immense surgical importance, and it is indicative of a grossly defective angiogenesis. Keeping in mind the clinical relevance of the variations which were observed, an attempt was made to explain them in the light of the embryogenic development. PMID:23634409

Gupta, Pratibha; Khullar, Meenakshi; Sharma, Ravikant; Singh, Richhpal

2013-01-01

200

Percutaneous atrial septal defect closure by using jugular venous access in a case with interrupted inferior vena cava  

PubMed Central

Femoral venous approach is the classical route of percutaneous atrial septal defect (ASD) closure. But in certain circumstances alternative routes are used. In this report percutaneous ASD closure in a case with interrupted vena cava by jugular venous approach is discussed. Percutaneous closure through femoral venous route was planned in a 6-year-old girl with ASD. Because of interrupted vena cava the jugular venous route was used. Having knowledge of this anatomical variation is important for interventionalists before performing femoral venous approach. Percutaneous transjugular venous access is a feasible alternative route in paediatric population for ASD closure. PMID:25489321

Narin, Nazmi; Baykan, Ali; Argun, Mustafa; Ozyurt, Abdullah; Uzum, Kazim

2014-01-01

201

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

PubMed Central

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

202

New approach of assessing hypovolemic shock class 1 during acute emergencies: Ultrasonographic inferior vena cava and abdominal aorta diameter ratio  

NASA Astrophysics Data System (ADS)

In a patient with hypovolemic shock class 1, the vital signs and biochemical properties are almost normal. The alteration of hemodynamic parameters and biochemical values occurs mainly in advanced hypovolemia state (neuroendocrine response). The availability of ultrasound machine at healthcare centers makes the measurement of vascular calibre feasible and possible. Inspiration and expiration inferior vena cava diameter changes predict hypovolemic shock class 1 but in acute emergencies this method is impractical. The purpose of this study is to develop a new approach in identifying hypovolemic shock at early phase by measuring the inferior vena cava and aorta diameter ratio using bedside ultrasound machine.

Ahmad, Rashidi; Kunji, Mohamad Iqhbal; Hj Abd Kareem, Meera Mohaideen; Halim, Shamimi A.

2013-09-01

203

Inhibitory effects of polyphenols isolated from marine alga Ecklonia cava on histamine release  

Microsoft Academic Search

In order to clarify the modern anti-allergy activity of crude extract of Ecklonia cava, which is an edible marine brown alga used as food ingredient and folk drug against allergy disease in Korea due to the abundant content of phlorotannin derivatives, the continuous chemical investigation led to the isolation of the two main bioactive phlorotannin derivatives 6,6?-bieckol (3) and 1-(3?,5?-dihydroxyphenoxy)-7-(2??,4??,6-trihydroxyphenoxy)-2,4,9-trihydroxydibenzo-1,4-dioxin

Quang-To Le; Yong Li; Zhong-Ji Qian; Moon-Moo Kim; Se-Kwon Kim

2009-01-01

204

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

205

Late gastrointestinal complications of inferior vena cava filter placement: case report and literature review.  

PubMed

In current practice, inferior vena cava (IVC) filters are commonly used in the prevention of pulmonary embolism. Despite their widespread use, periprocedural as well as late complications do occur. Filter penetration of the IVC wall into surrounding structures, including bowel, is a known although rare complication. This complication may manifest with abdominal pain, gastrointestinal bleeding, duodenocaval fistula, or small bowel obstruction. The authors present a case of abdominal pain from duodenal penetration by a Greenfield IVC filter 13 years after insertion. A detailed operative description and pertinent review of the literature is provided. PMID:21810813

Vandy, Frank; Rectenwald, John E; Criado, Enrique

2011-12-01

206

Fibrin cap disruption: an adjunctive technique for inferior vena cava filter retrieval.  

PubMed

Various adjunctive techniques have been reported for challenging inferior vena cava (IVC) filter retrievals (1-4). One particularly challenging obstacle to successful IVC filter retrieval is the formation of a radiolucent fibrin cap over the embedded apex of the IVC filter. This obstacle is a result of filter tilting that creates turbulent blood flow, which promotes fibrin cap formation. The aim of this brief report is to depict a novel technique for IVC filter retrieval: guide wire-manipulated disruption of the fibrin cap. PMID:22920982

Esparaz, Anthony M; Ryu, Robert K; Gupta, Ramona; Resnick, Scott A; Salem, Riad; Lewandowski, Robert J

2012-09-01

207

Recurrent fracture of a recovery inferior vena cava filter with pulmonary migration.  

PubMed

Inferior vena cava (IVC) filters are indicated in patients with venous thromboembolic disease in whom standard anticoagulation therapy is contraindicated or ineffective. A 32-year-old female presented to our hospital with chest pain 5 years after IVC filter placement. Imaging revealed sequential fracturing and embolization of two of the IVC filter arms to the pulmonary arteries. IVC filter fracture and subsequent migration to the lung is a rare complication. Systematic long-term follow-up in patients with IVC filters and, if possible, filter removal should be considered to prevent possible complications. PMID:22737054

Vossen, Josephina Anna; Thawait, Shrey Kumar; Golia, Jennifer Susan; Chamarthy, Murthy; Cholewczynski, Walter; Velasco, Noel

2012-06-01

208

Percutaneous removal of a Bard Simon nitinol permanent inferior vena cava filter.  

PubMed

Inferior vena cava (IVC) filters are used to treat thromboembolic disease when there is a contraindication to anticoagulation or failure of therapeutic anticoagulation therapy. Although there are retrievable IVC filters available, permanent IVC filters remain the most commonly placed IVC filters worldwide. Permanent IVC filters have been associated with long-term complications such as IVC thrombosis and obstruction, migration, and erosion into surrounding structures. Such complications may require removal of permanent IVC filters, which has been previously described with open surgery involving venotomy of the IVC. We report a case of a Bard Simon Nitinol permanent IVC filter that was removed by using percutaneous endovascular techniques. PMID:23820181

Johnstone, Jill K; Fleming, Mark D; Costopoulos, Mark G; Bjarnason, Haraldur

2012-12-01

209

Duodenocaval fistula from inferior vena cava filter penetration masquerading as lower gastrointestinal bleeding.  

PubMed

Asymptomatic penetration of the inferior vena cava (IVC) wall with retrievable filters is not uncommon. Occasionally, this can be a cause for morbidity, and rarely for mortality. We present a case of duodenocaval fistula, secondary to penetration from a strut of retrievable IVC filter that presented as lower gastrointestinal bleeding and discuss the subsequent management. Although newer generation retrievable filters provide a longer time for retrieval, they are associated with an increased incidence of IVC wall penetration, caudal migration, and occasionally symptomatic presentation, thereby necessitating surgical intervention. Close follow-up is warranted, and prompt retrieval of such devices should be done when their use is no longer indicated. PMID:21835583

Bathla, Lokesh; Panwar, Aru; Fitzgibbons, Robert J; Balters, Marcus

2011-11-01

210

Guide wire entrapment in a vena cava filter: techniques for dislodgement.  

PubMed

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 IVC filters, 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. In this article, we review the various preferred techniques reported in the literature for removal of the entrapped guide wire in particular situations, along with their indications, advantages, and disadvantages. We present simple useful recommendations to prevent this complication. PMID:23275482

Abdel-Aal, Ahmed K; Saddekni, Souheil; Hamed, Maysoon F

2013-02-01

211

Patient with a massive idiopathic thrombosis in the inferior vena cava.  

PubMed

A 50?year-old man with no significant medical history was admitted for dyspnea and left femoral swelling. Contrast-enhanced computed tomography revealed pulmonary thromboembolism (PTE) and a thrombus in the inferior vena cava (IVC). The thrombus extended from the proximal IVC to the left popliteal vein. Therefore, we decided that an IVC filter insertion was difficult to indicate. Urgent IVC and peripheral vein thrombectomy was performed under cardiopulmonary bypass. On postoperative day 1, venous ultrasonography showed residual deep vein thrombosis in the left external iliac-femoral vein and the popliteal vein. The IVC filter insertion was performed to prevent the recurrence of PTE. PMID:23555494

Kusuyama, Takanori; Iida, Hidetaka; Takeshita, Hiroaki; Wake, Ryotaro; Shimodozono, Shinichi; Kanamitsu, Hitoshi; Mitsui, Hideya; Yamada, Yukio

2012-01-01

212

Successful Thrombolysis of Occluded Inferior Vena Cava Filter with IVC Syndrome.  

PubMed

Thrombosis of Inferior Vena Cava (IVC) following filter insertion can occur in up to 30% of the cases. The optimal management of such cases is unknown. We describe a simple and less expensive method of achieving successful recanalization of the IVC in a 40 year old hypertensive man who developed recurrent pulmonary embolism after his orthopedic treatment. An IVC filter was inserted, which developed extensive thrombosis of the whole IVC and venous system of the lower limbs. Catheter directed thrombolysis using a multiple side-hole multipurpose catheter and balloon angioplasty was carried out in order to "crush and lyse" the IVC thrombi. PMID:24250999

Srinivas, Bc; Pal Singh, Ajit

2012-01-01

213

Endovascular treatment of late aortic perforation due to vena cava filter.  

PubMed

Perforation of inferior vena cava (IVC) by filter struts ranges from 9% to 24%, and clinical sequelae and complications are unpredictable. The aim of this article was to report an unusual case of late complication of IVC filter that caused an IVC wall perforation and penetration of the filter's hooks in the aorta, which was treated by endovascular procedure. Molding strut tip by balloon angioplasty, its accommodation with a bare stent, and its coverage and protection with an endoprosthesis is probably the first technique reported so far in this situation. PMID:22717360

Yoshida, Ricardo de Alvarenga; Yoshida, Winston Bonetti; Kolvenbach, Ralf; Vieira, Paulo Roberto Bahdur

2012-08-01

214

The excimer laser sheath technique for embedded inferior vena cava filter removal.  

PubMed

An inferior vena cava (IVC) filter became embedded within the IVC of a 45-year-old man after prolonged implantation. Because of incorporation of the filter legs within the caval endothelium, the filter was densely adherent and could not be sheathed using standard retrieval methods. In this patient, the authors performed percutaneous filter retrieval using an excimer laser sheath technique for circumferential ablation of dense fibrotic tissue between the filter and IVC. Endovascular laser ablation allowed facile separation of the filter from the IVC, without tearing of the tissues, and the filter was removed successfully without complication. PMID:21050774

Kuo, William T; Cupp, John S

2010-12-01

215

Wall-embedded recovery inferior vena cava filters: imaging features and technique for removal.  

PubMed

Retrievable inferior vena cava (IVC) filters may be removed when no longer needed or left in place as permanent filters. Removal of any of the currently available optionally retrieved IVC filters becomes more difficult when they are tilted. Tilting of an IVC filter can also lead the tip of the filter to become embedded into the wall of the IVC. This report describes a method for removal of the Recovery IVC filter with use of rigid bronchoscopy forceps when the tip of the filter is tilted and embedded in the IVC. PMID:16517787

Stavropoulos, S William; Solomon, Jeffrey A; Trerotola, Scott O

2006-02-01

216

Prophylactic Inferior Vena Cava Filters in High-Risk Bariatric Surgery  

Microsoft Academic Search

Background  Bariatric patients are at significant risk for venous thromboembolism (VTE) and a subset may benefit from retrievable inferior\\u000a vena cava filters (rIVCFs). Optimal VTE prophylaxis and a consensus on factors which make bariatric patients high risk have\\u000a not been established. This study describes our experience with the use of rIVCFs in combination with chemoprophylaxis for\\u000a high-risk bariatric surgery patients.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  A

Khashayar Vaziri; J. Devin Watson; Amy P. Harper; Juliet Lee; Fredrick J. Brody; Shawn Sarin; Elizabeth A. Ignacio; Albert Chun; Anthony C. Venbrux; Paul P. Lin

217

The Günther temporary inferior vena cava filter for short-term protection against pulmonary embolism  

Microsoft Academic Search

Purpose  To evaluate clinically the Günther temporary inferior vena cava (IVC) filter.\\u000a \\u000a \\u000a \\u000a Methods  Eleven IVC filters were placed in 10 patients. Indications for filter placement were surgical pulmonary embolectomy in seven\\u000a patients, pulmonary embolism in two patients, and free-floating iliofemoral thrombus in one patient. Eight filters were inserted\\u000a from the right femoral approach, three filters from the left. Follow-up was by plain

Louwerens D. Vos; Alexander V. Tielbeek; Ernst P. Bom; Harm C. Gooszen; Dammis Vroegindeweij

1997-01-01

218

Retrievable inferior vena cava filters in high-risk patients undergoing bariatric surgery  

Microsoft Academic Search

Background   Placement of retrievable inferior vena cava filters (rIVCF) may be beneficial in high-risk morbidly obese patients undergoing\\u000a bariatric procedures. Patients with a previous history of venous thromboembolism (VTE) are at high risk for postoperative\\u000a deep venous thrombosis (DVT) and pulmonary embolism (PE). \\u000a \\u000a \\u000a \\u000a Methods  A prospective database of bariatric surgery patients was studied from April 2003 to May 2007. A total

Khashayar Vaziri; Parag Bhanot; Eric S. Hungness; Mark D. Morasch; Jay B. Prystowsky; Alexander P. Nagle

2009-01-01

219

Right double inferior vena cava associated with retrocaval ureter: computed tomographic findings in two cases.  

PubMed

Two cases of right double inferior vena cava (RDIVC) were observed on computed tomography. In one case, the duplicated IVCs were both located to the right of the abdominal aorta and were nearly on the same coronal plane. In the other case, the right IVC showed partial duplication. The right ureter coursed posterior to the lateral IVC, then emerged between the duplicated IVC in both cases. The findings from the two cases presented in this report showed novel anatomical differences, likely attributable to different embryologic processes, as compared to previously reported cases of RDIVC. PMID:24513316

Shin, Mack; Lee, Jong Beum; Park, Sung Bin; Park, Hyun Jeong; Kim, Yang Soo

2014-01-01

220

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

221

Unprovoked deep venous thrombosis in a young adult associated with membranous obstruction of inferior vena cava.  

PubMed

Unprovoked deep venous thrombosis (DVT) in young adults is an unusual phenomenon, but it is associated with significant morbidity. Developmental anomalies of the inferior vena cava (IVC) should be considered as a possible aetiological factor, and appropriate investigations should be performed to determine the conclusive diagnosis and necessary treatment plan. We report a case of spontaneous thrombosis of the IVC and bilateral iliac venous system in a young man, associated with membranous obstruction of the IVC. He was diagnosed using several different investigational techniques, and successfully treated with mechanical thrombectomy, thrombolysis therapy and anticoagulation. PMID:25535222

Epperla, Narendranath; Usoltseva, Natalia

2014-01-01

222

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

223

Right Double Inferior Vena Cava (IVC) with Preaortic Iliac Confluence - Case Report and Review of Literature.  

PubMed

Anomalies of the inferior vena cava (IVC) are uncommon and most of them remain asymptomatic. Though rare, anomalies of IVC can lead to severe hemorrhagic complications especially during aortoiliac surgery. Prior knowledge of these variations facilitates proper interpretation of radiological images and safe performance of interventional procedures and surgeries. During routine anatomical dissection of abdomen in a female cadaver we observed the presence of right sided duplication of IVC. Both IVCs were present on the right side of abdominal aorta, one ventral and the other more dorsal in position and named ventral right IVC and dorsal right IVC. The ventrally and medially placed IVC, which appeared to be the main IVC was formed by the union of two common iliac veins in front of the right common iliac artery (Preaortic iliac confluence-"Marsupial Cava"). The right external iliac vein continued as the more dorsally and laterally placed dorsal right IVC. The right internal iliac vein after receiving a transverse anastomotic vein from the external iliac continued as the right common iliac vein. This transverse anastomosis was present behind the right common iliac artery. The narrower dorsal right IVC joined the wider ventral right IVC just below the level of renal veins to form a single IVC. The abdominal aorta presented a convexity to the left. PMID:24701503

Babu, C S Ramesh; Lalwani, Rekha; Kumar, Indra

2014-02-01

224

Interventional approaches in VTE treatment (vena cava filters, catheter-guided thrombolysis, thrombosuction).  

PubMed

Venous thromboembolism (VTE), including deep vein thrombosis (DVT) and pulmonary embolism (PE), is the third most common cardiovascular pathology after coronary disease and cerebrovascular diseases and is responsible for significant morbidity and mortality in the general population. Full-dose anticoagulation is the standard therapy for VTE, both the acute phase and the prolonged treatment. The latest guidelines of the American College of Chest Physicians recommend treatment with a full-dose of unfractionated heparin (UFH), low-molecular-weight-heparin (LMWH), fondaparinux, vitamin K antagonist (VKA), or systemically administered thrombolytics for most of the patients with objectively confirmed VTE. Catheter-guided thrombolysis and thrombosuction are interventional approaches that should be used only in selected populations; interruption of the inferior vena cava (IVC) with a filter can be performed to prevent life-threatening PE in patients with VTE and contraindications to anticoagulant treatment, bleeding complications during antithrombotic treatment, or VTE recurrences, despite optimal anticoagulation. This review summarizes the currently available literature regarding interventional approaches in VTE treatment (vena cava filters, catheter-guided thrombolysis, thrombosuction), discusses their efficacy and safety, and reviews the appropriate indications for their use in daily clinical practice. PMID:22648490

Imberti, Davide; Maraldi, Cinzia; Gallerani, Massimo

2012-04-01

225

Modeling hemodynamics in an unoccluded and partially occluded inferior vena cava under rest and exercise conditions.  

PubMed

Pulmonary embolism is the third leading cause of death in hospitalized patients in the US. Vena cava filters are medical devices inserted into the inferior vena cava (IVC) and are designed to trap thrombi before they reach the lungs. Once trapped in a filter, however, thrombi disturb otherwise natural flow patterns, which may be clinically significant. The goal of this work is to use computational modeling to study the hemodynamics of an unoccluded and partially occluded IVC under rest and exercise conditions. A realistic, three-dimensional model of the IVC, iliac, and renal veins represents the vessel geometry and spherical clots represent thombi trapped by several conical filter designs. Inflow rates correspond to rest and exercise conditions, and a transitional turbulence model captures transitional flow features, if they are present. The flow equations are discretized and solved using a second-order finite-volume method. No significant regions of transitional flow are observed. Nonetheless, the volume of stagnant and recirculating flow increases with partial occlusion and exercise. For the partially occluded vessel, large wall shear stresses are observed on the IVC and on the model thrombus, especially under exercise conditions. These large wall shear stresses may have mixed clinical implications: thrombotic-like behavior may initiate on the vessel wall, which is undesirable; and thrombolysis may be accelerated, which is desirable. PMID:22354383

Ren, Zhuyin; Wang, Stephen L; Singer, Michael A

2012-03-01

226

Modeling Flow Past a TrapEase Inferior Vena Cava Filter  

NASA Astrophysics Data System (ADS)

This study uses three-dimensional computational fluid dynamics to evaluate the efficacy of the TrapEase inferior vena cava (IVC) filter. Hemodynamics of the unoccluded and partially occluded filter are examined, and the clinical implications are assessed. The IVC, which is the primary vein that drains the legs, is modeled as a straight pipe, and a geometrically accurate model of the filter is constructed using computer aided design. Blood is modeled as a homogeneous, incompressible, Newtonian fluid, and the method of overset grids is used to solve the Navier-Stokes equations. Results are corroborated with in-vitro studies. Flow around the unoccluded filter demonstrates minimal disruption, but spherical clots in the downstream trapping position lead to regions of stagnant and recirculating flow that may promote further clotting. The volume of stagnant flow and the peak wall shear stress increase with clot volume. For clots trapped in the upstream trapping position, flow is disrupted along the cava wall downstream of the clot and within the filter. The shape and location of trapped clots also effect the peak wall shear stress and may impact the efficacy of the filter.

Singer, Michael; Henshaw, William; Wang, Stephen

2008-11-01

227

Mayer-Rokitansky-Kuster-Hauser Syndrome Associated with Severe Inferior Vena Cava Stenosis  

PubMed Central

Precis. The postoperative course of a neovagina creation procedure in a young woman with Meyer-Rokitansky-Kuster-Hauser syndrome was complicated, despite prophylaxis, by extensive pelvic deep venous thrombosis secondary to unsuspected severe inferior vena cava stenosis. Background. Mayer-Rokitansky-Kuster-Hauser (MRKH) syndrome is characterized by congenital vaginal agenesis and an absent or rudimentary uterus in genotypical females. Malformations of the inferior vena cava (IVC) are not commonly associated with MRKH syndrome. We report a case of a patient with MRKH syndrome with severe IVC stenosis that was diagnosed when the patient presented with extensive pelvic deep venous thrombosis (DVT) during the postoperative course of a neovagina creation. Case. A 19-year-old female underwent a McIndoe procedure. Despite DVT prophylaxis, extensive pelvic DVT of the femoral vein was diagnosed on postoperative day 7. Therapeutic anticoagulation was initiated, and pharmacological and mechanical thrombolysis were performed. During these procedures, a hypoplastic IVC was noted. Conclusion. MRKH syndrome can be associated with IVC malformations, which constitute an anatomical risk factor for postoperative DVT. PMID:25136466

Wu, John; Kolp, Lisa

2014-01-01

228

Right Double Inferior Vena Cava (IVC) with Preaortic Iliac Confluence – Case Report and Review of Literature  

PubMed Central

Anomalies of the inferior vena cava (IVC) are uncommon and most of them remain asymptomatic. Though rare, anomalies of IVC can lead to severe hemorrhagic complications especially during aortoiliac surgery. Prior knowledge of these variations facilitates proper interpretation of radiological images and safe performance of interventional procedures and surgeries. During routine anatomical dissection of abdomen in a female cadaver we observed the presence of right sided duplication of IVC. Both IVCs were present on the right side of abdominal aorta, one ventral and the other more dorsal in position and named ventral right IVC and dorsal right IVC. The ventrally and medially placed IVC, which appeared to be the main IVC was formed by the union of two common iliac veins in front of the right common iliac artery (Preaortic iliac confluence-“Marsupial Cava”). The right external iliac vein continued as the more dorsally and laterally placed dorsal right IVC. The right internal iliac vein after receiving a transverse anastomotic vein from the external iliac continued as the right common iliac vein. This transverse anastomosis was present behind the right common iliac artery. The narrower dorsal right IVC joined the wider ventral right IVC just below the level of renal veins to form a single IVC. The abdominal aorta presented a convexity to the left. PMID:24701503

Babu, C.S. Ramesh; Lalwani, Rekha; Kumar, Indra

2014-01-01

229

Mayer-rokitansky-kuster-hauser syndrome associated with severe inferior vena cava stenosis.  

PubMed

Precis. The postoperative course of a neovagina creation procedure in a young woman with Meyer-Rokitansky-Kuster-Hauser syndrome was complicated, despite prophylaxis, by extensive pelvic deep venous thrombosis secondary to unsuspected severe inferior vena cava stenosis. Background. Mayer-Rokitansky-Kuster-Hauser (MRKH) syndrome is characterized by congenital vaginal agenesis and an absent or rudimentary uterus in genotypical females. Malformations of the inferior vena cava (IVC) are not commonly associated with MRKH syndrome. We report a case of a patient with MRKH syndrome with severe IVC stenosis that was diagnosed when the patient presented with extensive pelvic deep venous thrombosis (DVT) during the postoperative course of a neovagina creation. Case. A 19-year-old female underwent a McIndoe procedure. Despite DVT prophylaxis, extensive pelvic DVT of the femoral vein was diagnosed on postoperative day 7. Therapeutic anticoagulation was initiated, and pharmacological and mechanical thrombolysis were performed. During these procedures, a hypoplastic IVC was noted. Conclusion. MRKH syndrome can be associated with IVC malformations, which constitute an anatomical risk factor for postoperative DVT. PMID:25136466

Londra, Laura; Tobler, Kyle; Wu, John; Kolp, Lisa

2014-01-01

230

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

231

Inhibitory Effects of Ecklonia cava Extract on High Glucose-Induced Hepatic Stellate Cell Activation  

PubMed Central

Nonalcoholic steatohepatitis (NASH) is a disease closely associated with obesity and diabetes. A prevalence of type 2 diabetes and a high body mass index in cryptogenic cirrhosis may imply that obesity leads to cirrhosis. Here, we examined the effects of an extract of Ecklonia cava, a brown algae, on the activation of high glucose-induced hepatic stellate cells (HSCs), key players in hepatic fibrosis. Isolated HSCs were incubated with or without a high glucose concentration. Ecklonia cava extract (ECE) was added to the culture simultaneously with the high glucose. Treatment with high glucose stimulated expression of type I collagen and ?-smooth muscle actin, which are markers of activation in HSCs, in a dose-dependent manner. The activation of high glucose-treated HSCs was suppressed by the ECE. An increase in the formation of intracellular reactive oxygen species (ROS) and a decrease in intracellular glutathione levels were observed soon after treatment with high glucose, and these changes were suppressed by the simultaneous addition of ECE. High glucose levels stimulated the secretion of bioactive transforming growth factor-? (TGF-?) from the cells, and the stimulation was also suppressed by treating the HSCs with ECE. These results suggest that the suppression of high glucose-induced HSC activation by ECE is mediated through the inhibition of ROS and/or GSH and the downregulation of TGF-? secretion. ECE is useful for preventing the development of diabetic liver fibrosis. PMID:22363250

Yokogawa, Kumiko; Matsui-Yuasa, Isao; Tamura, Akiko; Terada, Masaki; Kojima-Yuasa, Akiko

2011-01-01

232

Azygos Vein Dialysis Catheter Placement Using the Translumbar Approach in a Patient with Inferior Vena Cava Occlusion  

SciTech Connect

We describe percutaneous, translumbar placement of a 14-Fr dialysis catheter into an ascending lumbar vein to achieve tip position in an enlarged azygos vein. The patient had thrombosis of all traditional vascular sites, as well as the inferior vena cava. This catheter functioned well for 7 months before fatal catheter-related infection developed.

Jaber, Mohammad R., E-mail: raffatj@msn.co [Loma Linda University Medical Center, Department of Internal Medicine (United States); Thomson, Matthew J.; Smith, Douglas C. [Loma Linda University Medical Center, Department of Radiology (United States)

2008-07-15

233

The Inferior Vena Cava Filter is Effective in Preventing Fatal Pulmonary Embolus After Hip and Knee Arthroplasties  

Microsoft Academic Search

Thromboembolic disease is a relatively common and potentially devastating complication of joint arthroplasty. Mechanical and chemical prophylaxes are effective in reducing the incidence of this complication. Inferior vena cava (IVC) filters have been used to prevent the propagation and\\/or migration of venous emboli into the pulmonary circulation. This article reports on a cohort of joint arthroplasty patients either with confirmed

Matthew S. Austin; Javad Parvizi; Seth Grossman; Camilo Restrepo; Gregg R. Klein; Richard H. Rothman

2007-01-01

234

Excessive venous bleeding in a patient with acetabular pelvic fracture secondary to inferior vena cava filter occlusion.  

PubMed

Inferior vena cava (IVC) filters can be used to prevent pulmonary embolism in cases where anticoagulation is contraindicated. Filter obstruction remains one of the major complications after its insertion. This is the rare case demonstrating excessive venous bleeding during attempted open reduction internal fixation of an acetabular fracture secondary to subcomplete IVC filter thrombosis day 1 postinsertion of the device. PMID:23203175

Nahas, Sam; Yeoh, Clarence; Velayudham, Senthil

2012-01-01

235

Catheter-directed thrombolysis for double inferior vena cava with deep venous thrombosis: A case report and literature review.  

PubMed

Double inferior vena cava (DIVC) with deep venous thrombosis (DVT) is rare, and there is only one reported case of DIVC with DVT treated by catheter-directed thrombolysis. We report a case of a 32-year-old man with an extensive venous clot involving the infrarenal segment of a double IVC who received filter implantation and catheter-directed thrombolysis. PMID:23761872

Wang, Xiaodong; Chen, Zhengxin; Cai, Qianrong

2013-05-17

236

Innovations of surgical techniques for the management of inferior vena cava tumor thrombus of renal cell carcinoma.  

PubMed

Surgery for renal cell carcinoma with inferior vena cava thrombus is challenging. Cardiopulmonary bypass and deep hypothermic circulatory arrest significantly decreased the morbidity and mortality but associated with considerable postoperative complications. Debates still exist in one- or two-stage operations on which of the cardiac and urologic parts should be performed first. Modified maneuvers with main pulmonary artery clamping, vena cystoscope, transesophageal echocardiographic incorporation, and inferior vena cava interruptions are good for reduced perioperative morbidities. Surgical innovations have greatly facilitated the resection of renal cell carcinoma and inferior vena cava involvement. The advantages have been remarkable in less trauma, more cosmetic advantages, shorter hospital stay, and quicker recovery over the conventional open surgery with or without the use of bypass techniques. Such procedures have brought about improved long-term survivals. However, novel minimally invasive techniques such as robotic-assisted and hybrid approaches remain to gain further popularity in larger patient population. This article aims at a collection of the innovations of the surgical techniques in relation to the management of inferior vena cava tumor thrombus. PMID:25072132

Yuan, S M

2014-09-01

237

Isolated Dissection of Superior Mesenteric Artery  

PubMed Central

Isolated dissection of the superior mesenteric artery is a rare occurrence with a hitherto unknown exact etiology. Patients may present with abdominal symptoms or hemodynamic instability. We herein present a case of spontaneous isolated superior mesenteric artery dissection in a 48-year-old man, who was admitted with epigastric pain. Due to an undiagnosed paced rhythm on the electrocardiogram, he was given fibrinolysis treatment for acute myocardial infarction. On further evaluation, angiography revealed that the cause of pain was the dissection of the superior mesenteric artery. The patient’s symptoms were diminished with conservative management, obviating the need for the angioplasty of the superior mesenteric artery. PMID:23304184

Taherkhani, Maryam; Hashemi, Seyyed Reza; Nikpoor, Shahryar

2012-01-01

238

Liver visualization following 99m Tc-MAA ( 99m Tc-macroaggregated albumin) venogram indicating obstruction of the distal inferior vena cava  

Microsoft Academic Search

Uniform visualization of the liver following the injection of 99mTc-MAA for lower-limb venography and the appearance of activity in the paravertebral plexus are indicative of distal inferior vena cava (IVC) obstruction.

Zvi H. Oster; Harold L. Atkins

1985-01-01

239

Living Related Donor Liver Transplantation with Atrio-Caval Anastomosis of Inferior Vena Cava Graft Stored in Deep-Freeze for Budd-Chiari Syndrome  

PubMed Central

We have previously reported our experience in inferior vena cava resection and reconstruction techniques during liver transplantation for Budd-Chiari syndrome. Herein, we present on a case that demonstrates the importance of experience in complex vascular reconstruction techniques for living donor liver transplantation. A 15-year-old boy was scheduled for living donor liver transplantation for Budd-Chiari syndrome. Venous occlusion was extended up to the right atrial orifice of the supra-hepatic vena cava. Retro- and supra-hepatic segments of the vena cava was resected. Inferior vena cava graft stored in deep-freeze was available. Venous reconstruction was performed with end-to-end atrio-caval anastomosis. Surgical treatment was completed with the implantation of the right liver lobe donated by the patient’s mother. Post-surgical course was uneventful. PMID:25737776

Yaylak, F.; Ince, V.; Barut, B.; Unal, B.; Kilic, M.; Yilmaz, S.

2015-01-01

240

UNIVERSIDAD AUTNOMA DE MADRID ESCUELA POLITCNICA SUPERIOR  

E-print Network

no se puede hacer en el caso de los satélites. 1 La Unión Internacional de Telecomunicaciones es el telecomunicaciones a nivel internacional entre las distintas administraciones y empresas operadoras. 2 Con

Autonoma de Madrid, Universidad

241

Improving surgical outcomes in renal cell carcinoma involving the inferior vena cava.  

PubMed

Radical nephrectomy with tumor thrombectomy remains the mainstay of treatment in renal cell carcinoma with inferior vena cava extension. Despite the rapid improvements experienced in perioperative care in recent years, this intervention still often results in significant morbidity and mortality. A deeper understanding of salient features of this complex operation provides a valuable insight into the clinical mechanisms underlying the variations observed in surgical outcomes. The 'operation profile' serves not only as a basis for making an adequate prognostic assessment, but also creates a platform from which 'innovative' strategies for improving quality and safety can be made. The present review aims to set a 'profile' for radical nephrectomy and tumor thrombectomy, and to propose a number of strategies that may reduce the complication rates of this intervention. PMID:24236819

González, Javier; Andrés, Guillermo; Martínez-Salamanca, Juan Ignacio; Ciancio, Gaetano

2013-12-01

242

Acute wiiitis representing as thrombosis of the inferior vena cava and left pelvic veins.  

PubMed

Deep venous thrombosis as a result of venous wall injury provoked by trauma is a common finding. It often occurs in patients with sportive overstraining, caused by over fatigue of the body structures. In 2007, the entity of "acute wiiitis" was first described in a letter to the New England Journal of Medicine. Acute wiiitis sums up all affections, mainly skeletal and muscle affections, provoked by playing Nintendo Wii, a very common and loved video-game system. Deep venous thrombosis as a consequence of Nintendo Wii has not been described so far. We present a patient with a massive free floating thrombus of the left pelvic veins originating from the gluteal veins and reaching into the inferior vena cava after playing Nintendo Wii. PMID:24681523

Brodmann, M; Gary, T; Hafner, F; Eller, P; Deutschmann, H; Pilger, E; Seinost, G

2014-03-28

243

Inferior vena cava thrombosis: a rare complication of fibrocalcific pancreatic diabetes  

PubMed Central

A 42-year-old man presented with a history of recurrent loose motions for the previous 7?months. The patient also had a history of diabetes mellitus for the last 10?years and was uncontrolled on oral hypoglycaemic agents but responded to insulin. There was no history of any addiction. Examination and investigations showed the presence of malabsorption along with a calcified pancreas. The presence of a thrombus was also noted in the inferior vena cava. In the absence of alcohol intake, a diagnosis of fibrocalcific pancreatic diabetes was made and the patient was investigated for other hypercoagulable states but none was found. The patient was put on oral anticoagulants, insulin and pancreatic enzyme supplements, and currently, he is under regular follow-up for diabetes. PMID:23608838

Mishra, R; BE, Yathish; D, Himanshu; Usman, K

2013-01-01

244

Diagnostic imaging and pacemaker implantation in a domestic goat with persistent left cranial vena cava  

PubMed Central

Difficulty was encountered with the insertion of a right atrial pacing lead via the left jugular vein during lead and pacemaker implantation in a clinically normal goat as part of an ongoing rapid atrial pacing - induced atrial fibrillation research project. Fluoroscopic visualization of an abnormal lead advancement path prompted angiographic assessment which revealed a persistent left cranial vena cava (PLCVC) and prominent coronary sinus communicating with the right atrium. Angiography facilitated successful advancement and securing of the pacing lead into the right side of the interatrial septum. Cardiac magnetic resonance imaging/magnetic resonance angiography (MRI/MRA) allowed further characterization of this rare venous anomaly. Even though PLCVC has been reported once in a goat, to the authors’ knowledge this is the first report to include MRI/MRA characterization of PLCVC and prominent coronary sinus with successful cardiac pacemaker implantation using the PLCVC. PMID:24480717

Ranjan, Ravi; Dosdall, Derek; Norlund, Layne; Higuchi, Koji; Silvernagel, Joshua M.; Olsen, Aaron L.; Davies, Christopher J.; MacLeod, Rob; Marrouche, Nassir F.

2014-01-01

245

Cerebrospinal fluid dynamics of the cava septi pellucidi and vergae. Case report.  

PubMed

This case involved a 26-month-old boy who had recurrent hemorrhagic venous infarction caused by venous sinus occlusion. Distension and enlargement of the cavum septi pellucidi (CSP) and cavum vergae (CV), along with hydrocephalus, was detected during the course of the disease and was observed to regress together with resolution of the venous occlusion. Venous hypertension caused by sinus occlusion was thought to be responsible for the disturbed resorption of cerebrospinal fluid (CSF) in the CSP and CV in this patient. This case is unique because it is the first one to support the hypothesis of resorption of CSF in the cava by a pressure gradient involving the septal capillaries and veins. PMID:11147881

Sencer, A; Sencer, S; Turantan, I; Devecio?lu, O

2001-01-01

246

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

247

Inferior vena cava filtration in the management of venous thromboembolism: filtering the data.  

PubMed

Venous thromboembolism (VTE) is a common cause of morbidity and mortality. This is especially true for hospitalized patients. Pulmonary embolism (PE) is the leading preventable cause of in-hospital mortality. The preferred method of both treatment and prophylaxis for VTE is anticoagulation. However, in a subset of patients, anticoagulation therapy is contraindicated or ineffective, and these patients often receive an inferior vena cava (IVC) filter. The sole purpose of an IVC filter is prevention of clinically significant PE. IVC filter usage has increased every year, most recently due to the availability of retrievable devices and a relaxation of thresholds for placement. Much of this recent growth has occurred in the trauma patient population given the high potential for VTE and frequent contraindication to anticoagulation. Retrievable filters, which strive to offer the benefits of permanent filters without time-sensitive complications, come with a new set of challenges including methods for filter follow-up and retrieval. PMID:23997414

Molvar, Christopher

2012-09-01

248

Inferior vena cava filters for primary prophylaxis: when are they indicated?  

PubMed

Over the past several years there has been a rapid increase in the number of inferior vena cava (IVC) filters placed for primary thromboprophylaxis. Increased use has occurred in settings where other methods of thromboprophylaxis are viewed to be inadequate, technically challenging, or that place patients at an unacceptably high bleeding risk. These clinical services include trauma, bariatric surgery, neurosurgery, cancer, intensive care unit populations, and patients with a relative contraindication to anticoagulation. We review the studies to date addressing filter placement for these indications. Although preliminary data are promising, the patient populations most likely to benefit from prophylactic IVC filter placement have not been well defined, and randomized studies demonstrating efficacy have not been conducted. Moving forward, it will be critical to accomplish these two tasks if IVC filters are to continue to have a role in primary thromboprophylaxis. PMID:23450194

Wehrenberg-Klee, Eric; Stavropoulos, S William

2012-03-01

249

Inferior vena cava filters in the United States: less is more.  

PubMed

Despite the widespread use of Inferior vena cava (IVC) filters, there is no quality evidence to demonstrate their efficacy for routine use, nor there is a consensus on their appropriate indications among major medical societies. The introduction of retrievable filters led to further increase in the utilization of these devices. However, several studies have shown that retrievable filters are rarely retrieved. The implant rates of IVC filters are many folds higher in the United States than in Europe, yet the retrieval rates are much lower. The U.S. Food and Drug Administration has recently issued a safety alert advocating for consideration of filter retrieval when the protection offered by the filter is no longer needed. The controversies surrounding IVC filter placement and retrieval, however, will likely to continue in the absence of good evidence on their efficacy and side effects. Time has come for initiatives to conduct well designed trials based on agreed-upon criteria to settle this debate. PMID:25131922

Alkhouli, Mohamad; Bashir, Riyaz

2014-12-20

250

Significant caval penetration by the celect inferior vena cava filter: attributable to filter design?  

PubMed

This report describes transmural penetration of the inferior vena cava (IVC) by a newly introduced IVC filter within 9 days of its placement. A computed tomographic study demonstrated filter penetration with one of the primary struts lodging in the uncinate process of the pancreas. Because of the close resemblance of this new filter to another filter that has not been associated with penetration injuries, the key differences between the two designs were examined and the determination was made that the new filter, unlike the older one, has unprotected primary struts. Only filters with an unprotected primary strut design have been associated with penetration injuries such as the one described in this case. PMID:18003998

Sadaf, Arifa; Rasuli, Pasteur; Olivier, Andre; Hadziomerovic, Adnan; French, Gordon J; Aquino, Jose; O'Kelly, Kevin; Al-Mutairi, Badr

2007-11-01

251

Abdominal aortic aneurysm with inferior vena cava compression in association with deep venous thrombosis.  

PubMed

Deep venous thrombosis (DVT) of the lower extremity may be caused by external compression of the inferior vena cava (IVC) by a neighboring mass. A 55-year-old male presented with 8 months of intermittent left lower extremity swelling and signs of chronic venous stasis. Duplex ultrasound showed extensive DVT in the left leg. Subsequent imaging revealed a 4.2 cm infrarenal abdominal aortic aneurysm (AAA) compressing the IVC. In cases of chronic, unilateral DVT, work-up should include imaging for an anatomic cause. AAA is a rare cause of IVC compression with DVT, and is most commonly related to inflammatory AAAs. Previously reported cases of IVC compression by non-inflammatory AAAs have been secondary to large aneurysms (greater than 6 cm). This case illustrates that smaller AAAs lacking hemodynamically significant IVC obstruction may be found in association with DVT. PMID:24263082

Moore, Ryan D; Rutter, Elizabeth D; Zapko, Daniel R; Kolade, Victor O; Ayyoub, Shadi M

2013-12-01

252

Anomalies of the inferior vena cava and renal veins and implications for renal surgery  

PubMed Central

Abnormalities of the inferior vena cava (IVC) and renal veins are extremely rare. However, with the increasing use of computed tomography (CT), these anomalies are more frequently diagnosed. The majority of venous anomalies are asymptomatic and they include left sided IVC, duplicated IVC, absent IVC as well as retro-aortic and circumaortic renal veins. The embryological development of the IVC is complex and involves the development and regression of three sets of paired veins. During renal surgery, undiagnosed venous anomalies may lead to major complications. There may be significant hemorrhage or damage to vascular structures. In addition, aberrant vessels may be mistaken for lymphadenopathy and may be biopsied. In this review we discuss the embryology of the IVC and the possible anomalies of IVC and its tributaries paying particular attention to diagnosis and implications for renal surgery. PMID:24578852

Eldefrawy, Ahmed; Arianayagam, Mohan; Kanagarajah, Prashanth; Acosta, Kristell

2011-01-01

253

Successful repair of iatrogenic inferior vena cava injury during cardiac surgery.  

PubMed

Iatrogenic injury to the supra-diaphragmatic inferior vena cava (IVC) is uncommon, but can lead to a potentially complicated situation. Injury to the IVC is encountered usually during re-operative and congenital surgery, but can occur during the course of routine cardiac surgery as well. Depending on the mechanism, injury may involve the anterior or posterior wall of the IVC. A short adherent IVC, redo surgery and female sex are incremental risk factors for injury. Control of bleeding, adequate exposure and prevention of extension of the tear are the important considerations at the time of repair. While a number of management techniques have been reported, we describe a very simple maneuver that allows swift control of bleeding, adequate exposure and minimizes the risk of further extension and a satisfactory repair. PMID:24843114

Narayan, P; Das, D; Saha, A; Das, M

2015-03-01

254

Phlorofucofuroeckol A isolated from Ecklonia cava alleviates postprandial hyperglycemia in diabetic mice.  

PubMed

This study was designed to investigate whether phlorofucofuroeckol A inhibited ?-glucosidase and ?-amylase activities and alleviated postprandial hyperglycemia in diabetic mice. Phlorofucofuroeckol A that was isolated from Ecklonia cava (brown algae) demonstrated prominent inhibitory effects against ?-glucosidase and ?-amylase activities. The IC50 values of phlorofucofuroeckol A against ?-glucosidase and ?-amylase were 19.52 and 6.34?M, respectively. These inhibitory activities of phlorofucofuroeckol A were higher than those of acarbose, which was used as a positive control. Increases in postprandial blood glucose levels were significantly more suppressed in the group administered phlorofucofuroeckol A compared to the control group in both diabetic and normal mice. Moreover, the area under the curve was significantly lower after phlorofucofuroeckol A administration (2296 versus 2690mmolmin/l) in the diabetic mice. These results suggested that phlorofucofuroeckol A is a potent ?-glucosidase inhibitor and can alleviate the postprandial hyperglycemia that is caused by starch. PMID:25680946

You, Han-Nui; Lee, Hyun-Ah; Park, Mi-Hwa; Lee, Ji-Hyeok; Han, Ji-Sook

2015-04-01

255

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

256

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

257

Commissural connections of human superior colliculus  

Microsoft Academic Search

The superior colliculus of higher mammals is a laminated structure of the midbrain that receives visual input in superficial layers, and visual, auditory and somatosensory input in deep layers. The superior colliculi on either side are interconnected via the intercollicular commissure, which has been proposed to play a role in visual transfer and gaze orienting. Intercollicular connections have been anatomically

E Tardif; S Clarke

2002-01-01

258

Clinical Manifestations of Superior Semicircular Canal Dehiscence  

Microsoft Academic Search

Objectives\\/Hypotheses: To determine the symp- toms, signs, and findings on diagnostic tests in pa- tients with clinical manifestations of superior canal dehiscence. To investigate hypotheses about the ef- fects of superior canal dehiscence. To analyze the out- comes in patients who underwent surgical repair of the dehiscence. Study Design: Review and analysis of clinical data obtained as a part of

Lloyd B. Minor

2005-01-01

259

Lake Effects: The Lake Superior Curriculum Guide.  

ERIC Educational Resources Information Center

This curriculum guide was launched in response to a need for Lake Superior-specific educational materials and contains lessons and activities that can be used to teach about Lake Superior. The lessons in this book are divided into four sections. Each of the first three sections has a background section that provides basic information about Lake…

Beery, Tom; And Others

260

Superior-Subordinate Relations: Leadership and Headship  

Microsoft Academic Search

The organizational behavior literature on leadership is marked by persistent conceptual problems which limit its applicability to the study of superior-subordinate relationships within organizations. This paper proposes a conceptual framework for viewing superior-subordinate relationships that makes explicit the differences between leadership, power, and authority. Several popular organizational behavior models of leadership are reviewed in light of the proposed framework and

Thomas A. Kochan; Stuart M. Schmidt; Thomas A. DeCotiis

1975-01-01

261

Remodelling of the Superior Caval Vein After Angioplasty in an Infant with Superior Caval Vein Syndrome  

SciTech Connect

An 8-month old girl was presented with superior caval vein syndrome early after cardiac surgery. Angiography showed severe stenosis of the superior caval vein with 50 mmHg pressure gradient. Following balloon angioplasty, the pressure gradient was reduced to 7 mmHg with some residual stenosis of the superior caval vein. When the patient was reevaluated 5 months after the procedure, angiography revealed a normal diameter of the superior caval vein without a pressure gradient.

Mert, Murat [Istanbul University, Institute of Cardiology, Department of Cardiovascular Surgery (Turkey)], E-mail: mmert@superonline.com; Saltik, Levent [Istanbul University, Cerrahpasa Medical School, Department of Pediatric Cardiology (Turkey); Gunay, Ilhan [Istanbul University, Institute of Cardiology, Department of Cardiovascular Surgery (Turkey)

2004-08-15

262

Contribution of splanchnic and musculocutaneous vascular compartments to the formation of blood flow volume in the vena cava posterior during catecholamine treatment.  

PubMed

Studies by electromagnetic flowmetry in acute experiments on cats under conditions of the open thoracic cage and artificial ventilation of the lungs showed that 64% of venous return via the vena cava posterior was realized at the expense of the splanchnic and 36% due to the musculocutaneous vessels (abdominal basin of the caudal vein). Epinephrine (20 ?g/kg) increased the contribution of the splanchnic venous blood flow to the increase in the blood flow in the vena cava posterior and reduced the contribution of the musculocutaneous veins throughout the entire duration of systemic reactions: 84% of the blood flow increase in the vena cava posterior was due to the splanchnic and just 16% due to the musculocutaneous blood flow. Norepinephrine (10 ?g/kg) resulted in a phase-wise involvement of the studied compartments in blood flow increase in the vena cava posterior. During the initial period of systemic reactions (coinciding with the maximum systemic BP rise) the contribution of the musculocutaneous compartment was 13% higher, while later (by the time of the maximum elevation of venous blood flow in the studied compartments) the contribution of splanchnic veins predominated constituting 89% of venous blood flow in the vena cava posterior. These results indicate that venous blood flow increase in the splanchnic vessels largely determined the formation of changes in the vena cava posterior blood flow in response to catecholamines. PMID:22448347

Samoilenko, A V; Yurov, A Yu; Tkachenko, B I

2011-08-01

263

Use of noncontrast computed tomography of the inferior vena cava for real-time imaging guidance for the placement of inferior vena cava filters.  

PubMed

Appropriate placement of an inferior vena cava (IVC) filter necessitates imaging of the renal veins because when an IVC filter is deployed its tip should be at or below the inferior aspect of the inferiormost renal vein. Traditionally, imaging during placement of IVC filters has been with conventional cavography and fluoroscopy. Recently, intravascular ultrasound has been used for the same purpose but with additional expense. Morbidly obese patients often exceed the weight limit of fluoroscopy tables. In addition, short obese patients are at risk of falling from narrow fluoroscopy tables. For such patients, computed tomography (CT) guidance is a viable alternative to conventional fluoroscopic guidance. IVC placement was performed in the CT suite for two obese patients who exceeded the weight limits of the available fluoroscopy tables. In one case, a Vena-Tech filter (Braun Medical, Melsungen, Germany) was placed using CT fluoroscopy. In the second case, a Recovery (Bard, Murray Hill, NJ) filter was placed using intermittent limited z-axis scanning. In the first case, the filter was placed below the level of the renal veins and above the confluence of the iliac veins, which is acceptable placement. In the second case, with refinement of technique, the filter tip was placed less than 1 cm below the inferiormost renal vein, which is considered optimal placement. CT of the IVC precisely images the renal veins and can characterize their number and their confluence with the IVC. CT guidance is a viable alternative to fluoroscopic guidance for the placement of IVC filters in morbidly obese patients. PMID:25780332

Winkler, Michael A; Majmudar, Palak M; Landwehr, Kevin P; Hobbs, Stephen B; Saha, Sibu P

2015-03-01

264

Antiphospholipid Antibody Syndrome Associated with Graves’ Disease Presenting As Inferior Vena Cava Thrombosis with Bilateral Lower Limb DVT  

PubMed Central

We report a case of a 60-year-old lady who presented with bilateral lower limb swelling and a thyroid swelling with clinical features consistent with thyrotoxicosis. Investigations revealed the presence of a thrombus in bilateral external, internal iliac veins, and inferior vena cava extending up to its infrahepatic part. Hormone profile and radioiodine uptake scan confirmed the diagnosis of Graves’ disease. Further workup revealed the presence of antiphospholipid antibodies (confirmed after a repeat test at 12 weeks). The patient was treated with antithyroid drugs and anticoagulants. The patient improved with normalization of thyroid function and partial recanalization of the infrahepatic part of inferior vena cava. Hyperthyroidism has been implicated as a potential hypercoagulable state; however, the association of Graves’ disease with antiphospholipid antibody syndrome is limited to isolated case reports. This case highlights a new mechanism underlying hypercoagulability associated with Graves’ disease. PMID:24812529

Jain, Ankur

2014-01-01

265

Ultrasound-accelerated, catheter-directed thrombolysis for inferior vena cava thrombosis after an orthotopic liver transplant.  

PubMed

Inferior vena cava thrombosis is a rare occurrence after an orthotopic liver transplant that is associated with a high rate of retransplant and mortality. There is no consensus regarding the optimal therapeutic strategy. Surgical management, including thrombectomy with revision of the cavocaval anastomosis, has been described. With the use of endovascular therapies, several minimally invasive approaches are available that are effective and avoid the high morbidity associated with reoperative surgery. We describe our successful experience using an approach after a liver transplant in which the inferior vena cava thrombosis in a patient presenting with acute renal failure, anorexia, weight loss, and fatigue using an ultrasound-accelerated, catheter-directed thrombolysis platform in conjunction with systemic anticoagulation. PMID:24918871

Latchana, Nicholas; Dowell, Joshua D; Al Taani, Jamal; Michaels, Anthony; Elkhammas, Elmadhi; Black, Sylvester M

2015-02-01

266

Bard Denali inferior vena cava filter fracture and embolization resulting in cardiac tamponade: a device failure analysis.  

PubMed

A 46-year-old woman underwent inferior vena cava filter placement before bariatric surgery and returned within 6 months for routine removal. She complained of a 1-week history of severe chest pain, and during retrieval, two fractured filter components were identified including one arm in the right ventricle. The filter body and one fragment were successfully retrieved, but the fragment in the right ventricle was refractory to percutaneous retrieval. During open-heart surgery, the fragment was found traversing through the ventricular wall resulting in cardiac tamponade. Electron microscopic fragment analysis revealed high-cycle metal fatigue indicating the filter design failed to withstand this patient's natural inferior vena cava biomechanical motions. PMID:25541449

Kuo, William T; Robertson, Scott W

2015-01-01

267

Neoadjuvant Therapy with Sorafenib in Advanced Renal Cell Carcinoma with Vena Cava Extension Submitted to Radical Nephrectomy  

Microsoft Academic Search

A 71-year-old man with advanced left renal cell carcinoma (lymph node involvement and vena cava thrombus) was submitted to 6 months of neoadjuvant treatment with sorafenib before open radical nephrectomy. After sorafenib treatment and before surgery a new CT scan confirmed the presence of a 9.0 cm in diameter solid mass in the left kidney but a reduction in thrombus

Franco Di Silverio; Alessandro Sciarra; Ulderico Parente; Alfarone Andrea; Magnus Von Heland; Valeria Panebianco; Roberto Passariello

2008-01-01

268

Persistent abdominal pain caused by an inferior vena cava filter protruding into the duodenum and the aortic wall.  

PubMed

Inferior vena cava (IVC) filter placement has increased dramatically over the past 2 decades. Symptomatic duodenal perforation by IVC filters with involvement of the aorta is a very rare, but challenging, complication. We report a case of persistent atypical right upper quadrant pain secondary to duodenal and aortic perforation by an IVC filter treated with cavotomy for filter removal, primary repair of the duodenum, and extraction of prongs from the aorta. PMID:22627053

Malgor, Rafael D; Hines, George L; Terrana, Lisa; Labropoulos, Nicos

2012-08-01

269

Protective effect of Ecklonia cava on UVB-induced oxidative stress: in vitro and in vivo zebrafish model  

Microsoft Academic Search

Chronic exposure of the skin to ultraviolet B (UVB) radiation induces oxidative stress, which plays a crucial role in the\\u000a induction of skin aging. In this study, potential protective effect of extracts of six species of brown seaweeds on UVB radiation-induced\\u000a cell damage was assessed via cell viability in HaCaT cells. The Ecklonia cava extract showed a profound protective effect

Seok-Chun Ko; Seon-Heui Cha; Soo-Jin Heo; Seung-Hong Lee; Sung-Myung Kang; You-Jin Jeon

270

Renal Artery Stump to Inferior Vena Cava Fistula: Unusual Clinical Presentation and Transcatheter Embolization with the Amplatzer Vascular Plug  

SciTech Connect

Fistulous communication between the renal artery stump and inferior vena cava following nephrectomy is rare. We describe the case of a 52-year-old man with a fistula detected on investigation for hemolytic anemia in the postoperative period. The patient had had a nephrectomy performed 2 weeks prior to presentation for blunt abdominal trauma. The fistula was successfully occluded percutaneously using an Amplatzer vascular plug. The patient recovered completely and was discharged 2 weeks later.

Taneja, Manish; Lath, Narayan, E-mail: lath_narayan@yahoo.com; Soo, Tan Bien; Hiong, Tay Kiang; Htoo, Maung Myint; Richard, Lo [Singapore General Hospital, Department of Diagnostic Radiology (Singapore); Fui, Alexander Chung Yaw [Singapore General Hospital, Department of Surgery (Singapore)

2008-07-15

271

Curso Superior Universitario Neuromarketing y Ventas  

E-print Network

Curso Superior Universitario en Neuromarketing y Ventas conocemos con el nombre de neuromarketing. Esta evolución trajo consigo el desarrollo de un exitosamente a las organizaciones hacia sus metas. Sin duda, el neuromarketing trae consigo un

Rey Juan Carlos, Universidad

272

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

273

78 FR 21116 - Superior Supplier Incentive Program  

Federal Register 2010, 2011, 2012, 2013, 2014

...relations would be granted Superior Supplier Status (SSS). Contractors that achieve SSS could receive more favorable contract terms and conditions in DoN contracts. In addition to recognition of SSS at the business unit level, multi-business...

2013-04-09

274

Superior Orbital Fissure Syndrome: A Case Report  

PubMed Central

Superior orbital fissure syndrome is an infrequently encountered entity with a unique presentation and significant morbidity. This article reviews the background of the syndrome, treatments in the literature, and discusses a recent case with treatment strategy. PMID:23730429

Evans, Heath H.; Wurth, Bradley A.; Penna, Kevin J.

2012-01-01

275

Inferior vena cava obstruction: long-term results of endovascular management  

PubMed Central

Background Hepatic venous outflow obstruction (HVOO) can have acute or chronic presentation. In the chronic variety of inferior vena cava (IVC) obstruction, endovascular management with balloon angioplasty and stent implantation has emerged as a feasible, safe alternative to surgery which has high incidence of mortality and morbidity. Aims and objectives To study the feasibility and long-term follow-up of endovascular management of chronic IVC obstruction. Methods We studied 12 cases of HVOO who underwent endovascular management (balloon dilatation ± stenting). In most of the cases, the cause of obstruction was not obvious, but one case had metastatic hepatic nodules compressing on IVC. Diagnosis was established by clinical examination, venous Doppler and was confirmed by venography and/or computed tomography (CT) angiography. Cases underwent balloon dilatation and/or stenting. Results Out of 12 cases, six had membranous obstruction (four complete and two incomplete), five cases had segmental stenosis and one case had tumour compression. The lesion was crossed with either guide wire or Brockenbrough needle with Mullins sheath assembly and balloon dilatation was done with Inoue or Mansfield balloon. Seven cases underwent balloon dilatation alone while five cases underwent stenting. There was procedural success in all cases with reduction of gradient by 84%, disappearance of collaterals and clinical improvement. During the follow-up of 13 years, one case had restenosis, which was managed by stenting. Conclusion Endovascular management of IVC obstruction is safe with good long-term patency rates. PMID:22572493

Srinivas, B.C.; Dattatreya, P.V.; Srinivasa, K.H.; Prabhavathi; Manjunath, C.N.

2012-01-01

276

Cardiac tamponade following liver transplantation after intrapericardial control of the suprahepatic vena cava.  

PubMed

Transabdominal intrapericardial control of the suprahepatic inferior vena cava (SIVC) is a rather uncommon procedure occasionally required in conjunction with complicated liver transplantation (LT) and hepatobiliary surgery. Experience with this technique is limited. Here we report 6 cases of LT in which transabdominal intrapericardial control of the SIVC was necessary. After institutional review board approval was obtained, a single-center, retrospective review was conducted from January 1991 to December 2013 to identify adult cases (age?>?18 years) of LT in which transabdominal intrapericardial isolation of the SIVC was necessary. Among 4102 adult LT cases in the study period, 6 such cases were identified. To gain access to the pericardial space, a 6- to 9-cm vertical incision was made above the SIVC. After reperfusion, the diaphragmatic incision was partially closed and selectively drained. Pericardial tamponade developed in 1 patient, and it necessitated emergent reoperation and widespread drainage. In conclusion, transabdominal intrapericardial isolation of the SIVC is easily achieved without the need for a separate thoracic incision. However, to be effective, the pericardial incision should be only partially closed, and the pericardial sac should be drained liberally. Such patients should be carefully monitored for signs and symptoms of pericardial tamponade, the development of which should prompt an immediate return to the operating room for emergent decompression and widespread drainage. Liver Transpl 21:339-343, 2015. © 2015 AASLD. PMID:25408472

Xu, Junming; Hong, Johnny C; Busuttil, Ronald W

2015-03-01

277

Adrenal cortical carcinoma with extension into the inferior vena cava – case report and literature review  

PubMed Central

Adrenocortical carcinoma (ACC) is a rare endocrine malignancy with an incidence rate of 1 to 2 per million person-years. ACC most commonly arises sporadically, but may be associated with familial tumour syndromes. Clinical symptoms are mainly related to an excess of steroid hormones. We present an unusual case of adrenocortical carcinoma in a 27-year-old male who complained of non specific mass-effect related symptoms of slowly growing intensity differing from others described in literature because of the patient’s age and the sudden deterioration of the clinical course. The tumour was resected with the left kidney with an extension into the inferior vena cava. Histological examination revealed morphological features characteristic of an adrenal cortical tumour. The immunohistochemical results (positive reactions for vimentin, CD56, inhibin, melan A, synaptophysin, bcl-2, calretinin) confirmed the diagnosis. According to the most widely used modified Weiss criteria and the Van Slooten system, a diagnosis of adrenal cortical carcinoma was strongly confirmed. The postoperative condition was poor. Reoperation was conducted, including abdominal aorta thrombectomy and aortic prosthesis implantation. The patient died two days after the second operation. Autopsy revealed a metastatic tumour in the left lung and morphological symptoms of acute circulatory collapse due to a massive haemorrhage into the abdominal cavity, which was the direct cause of death. Virtual slides The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1602226377106882. PMID:24602387

2014-01-01

278

The Guenther temporary inferior vena cava filter for short-term protection against pulmonary embolism  

SciTech Connect

Purpose. To evaluate clinically the Guenther temporary inferior vena cava (IVC) filter. Methods. Eleven IVC filters were placed in 10 patients. Indications for filter placement were surgical pulmonary embolectomy in seven patients, pulmonary embolism in two patients, and free-floating iliofemoral thrombus in one patient. Eight filters were inserted from the right femoral approach, three filters from the left. Follow-up was by plain abdominal radiographs, cavography, and duplex ultrasound (US). Eight patients received systemic heparinization. Follow-up, during 4-60 months after filter removal was by clinical assessment, and imaging of the lungs was performed when pulmonary embolism (PE) was suspected. Patients received anticoagulation therapy for at least 6 months. Results. Ten filters were removed without complications 7-14 days (mean 10 days) after placement. One restless patient pulled the filter back into the common femoral vein, and a permanent filter was placed. In two patients a permanent filter was placed prior to removal. One patient developed sepsis, and one an infection at the insertion site. Clinically no recurrent PE developed with the filter in place or during removal. One patient had recurrent PE 7 months after filter removal. Conclusion. The Guenther temporary IVC filter can be safely placed for short-term protection against PE. The use of this filter is not appropriate in agitated or immunocompromised patients.

Vos, Louwerens D.; Tielbeek, Alexander V. [Catharina Hospital, Department of Radiology (Netherlands); Bom, Ernst P. [Sophia Hospital, Department of Radiology (Netherlands); Gooszen, Harm C. [Catharina Hospital, Department of Pulmonology (Netherlands); Vroegindeweij, Dammis [Catharina Hospital, Department of Radiology (Netherlands)

1997-03-15

279

Recidive of renal cell carcinoma tumor thrombus in inferior vena cava via lumbar vein.  

PubMed

Renal cell carcinoma (RCC) develops tumor thrombus in the renal vein and inferior vena cava (IVC) in 10% of cases. Surgical treatment is radical nephrectomy and thrombectomy of the IVC. Local recidive can develop in the lumbar fossa, lymph nodes, and the IVC. We report a 58-year-old patient admitted to the Clinic for Urology at the Military Medical Academy, Belgrade, Serbia, in February 2009 with RCC of the left kidney and tumor thrombus in the IVC. After ultrasonography exam and multislice computed tomography scan, we performed radical nephrectomy and thrombectomy of the IVC (level II). Four months after the operation, ultrasound exam and cavography showed intracaval and paracaval recidive tumor masses in the renal part of the IVC. On operation we removed intraluminal IVC thrombus, which arises from the lumbar vein on the IVC posterior wall, with paracaval thrombus in the lumbar vein. We conclude that RCC tumor thrombus can spread from the kidney to the IVC through the lumbar vein. PMID:21309423

Tomi?, Aleksandar; Milovi?, Novak

2010-01-01

280

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

281

Outcomes of patients requiring insertion of an inferior vena cava filter: a retrospective observational study.  

PubMed

Data regarding inferior vena cava (IVC) filter use and complications are scarce. This study evaluates the safety and efficacy of IVC filters over a 4-year period at two adult tertiary care hospital sites. A retrospective observational study was conducted of consecutive admitted patients who underwent insertion of an IVC filter between 1 January 2007 and 31 December 2010. The main objective of the study was to evaluate the safety and efficacy of IVC filters. We identified 338 patients with an attempted filter insertion who were followed for a median 16.3 months. Ninety-one percent of filters inserted were for an appropriate indication. Sixty-eight patients (20% of all patients) had one or more filter-related complication. Despite a median time after filter insertion to start anticoagulation of 2 days (interquartile range 3 days) for prophylactic and 6 days (interquartile range 7 days) for full dose, 38 patients (11% of all patients) had one or more thrombotic complications during follow-up. In a subgroup of patients with complete anticoagulation information available, thrombotic complications occurred in 18, 16, and 8% of patients receiving no, prophylactic, or full dose anticoagulation after IVC filter insertion, respectively (NS; P?=?0.13). IVC filter use in our study was associated with a substantial rate of complications including thrombotic complications. This study highlights the need for further research regarding the safety and efficacy of IVC filters and the role for early initiation of anticoagulation. PMID:24418944

Duffett, Lisa D; Gándara, Esteban; Cheung, Andrew; Bose, Gauruv; Forster, Alan J; Wells, Philip S

2014-04-01

282

Clinical review: inferior vena cava filters in the age of patient-centered outcomes.  

PubMed

Inferior vena cava filter (IVCF) use continues to increase in the United States (US) despite questionable clinical benefit and increasing concerns over long-term complications. For this review we comprehensively examine the randomized, prospective data on IVC filter efficacy, compare relative rates of IVCF placement in the US and Europe, compare commonly considered guidelines for IVCF indications, and the current data on IVCF complications. Searches of MEDLINE and Cochrane databases were conducted for randomized prospective IVCF studies. Only three randomized prospective studies for IVCFs were identified. Commonly cited IVCF guidelines were reviewed with attention to their evolution over time. No evidence has shown a survival benefit with IVCF use. Despite this, continued rising utilization, especially for primary prophylactic indications, is concerning, given increasing evidence of long-term filter-related complications. This is particularly noted in the US where IVCF placements for 2012 are projected to be 25 times that of an equivalent population in Europe (224,700 versus 9,070). Pending much-needed randomized controlled trials that also evaluate long-term safety, we support the more stringent American College of Chest Physicians (ACCP) guidelines for IVCF placement indications and advocate a close, structured follow-up of retrievable IVCFs to improve filter retrieval rates. PMID:24099038

Wang, Stephen L; Lloyd, Allen J

2013-11-01

283

A computational method for predicting inferior vena cava filter performance on a patient-specific basis.  

PubMed

A computational methodology for simulating virtual inferior vena cava (IVC) filter placement and IVC hemodynamics was developed and demonstrated in two patient-specific IVC geometries: a left-sided IVC and an IVC with a retroaortic left renal vein. An inverse analysis was performed to obtain the approximate in vivo stress state for each patient vein using nonlinear finite element analysis (FEA). Contact modeling was then used to simulate IVC filter placement. Contact area, contact normal force, and maximum vein displacements were higher in the retroaortic IVC than in the left-sided IVC (144 mm(2), 0.47 N, and 1.49 mm versus 68 mm(2), 0.22 N, and 1.01 mm, respectively). Hemodynamics were simulated using computational fluid dynamics (CFD), with four cases for each patient-specific vein: (1) IVC only, (2) IVC with a placed filter, (3) IVC with a placed filter and model embolus, all at resting flow conditions, and (4) IVC with a placed filter and model embolus at exercise flow conditions. Significant hemodynamic differences were observed between the two patient IVCs, with the development of a right-sided jet, larger flow recirculation regions, and lower maximum flow velocities in the left-sided IVC. These results support further investigation of IVC filter placement and hemodynamics on a patient-specific basis. PMID:24805200

Aycock, Kenneth I; Campbell, Robert L; Manning, Keefe B; Sastry, Shankar P; Shontz, Suzanne M; Lynch, Frank C; Craven, Brent A

2014-08-01

284

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

285

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

286

On determining the characteristics of a Greenfield Inferior Vena Cava Filter using CFD  

NASA Astrophysics Data System (ADS)

In those patients with deep venous thrombosis (DVT) or those at a high risk for DVT, and who have contraindications to or are unresponsive to anticoagulation therapy, vena cava filters are often used to prevent recurrent pulmonary emboli. Ideally, the filter should be efficacious while being non-thrombogenic and non-impeding to the blood flow. In reality, the filter has to establish a balance between clot capture efficiency and flow impedance before and after clot capture. The development and use of numerical tools to study the characteristics of filters and its application to the case of a Greenfield filter has been presented here. A detailed model resolving the flow field around the filter to a fine detail is described. The thrombogenecity of the filter in un-occluded flows is determined by analyzing plots of shear stresses and velocity fields. To evaluate a filter's clot capturing efficacy, a Thin Wire Model (TWM) has been developed and used in conjunction with a moving finite element scheme to study the probability of clot capturing for the Greenfield filter.

Swaminathan, Tirumani; Hu, Howard; Patel, Aalpen

2004-11-01

287

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

288

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

PubMed

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 IC(50) 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

289

Histology of Tissue Adherent to OptEase Inferior Vena Cava Filters Regarding Indwelling Time  

SciTech Connect

The purpose of this paper is to report on the histology of tissues found on retrieved filters with regard to indwelling time. Between February 2006 and January 2007, 28 Optease inferior vena cava filters (Cordis Europa, Roden, The Netherlands) were retrieved from 27 patients. Twenty-two filters were inserted prophylactically for trauma patients and six for patients with venous thromboembolism. Cavography was performed both before and after filter removal to evaluate the presence of thrombi or wall damage. Filters were retrieved with the snare and sheath method. All material adherents to the filters were examined histologically.The mean indwelling time of the filters was 24.9 days (range, 6-69 days). Red tissue fragments were seen on all the filters, consistent microscopically with clots and fibrin. On five filters (18%; mean indwelling time, 45.4 days) white tissue consistent with vascular intima was found. All postprocedure cavographies were normal. We conclude that most material adherent to the retrieved filters is thrombi, while vascular intima can be found in the minority of filters with a longer indwelling time.

Rimon, Uri, E-mail: rimonu@sheba.health.gov.il; Volkov, Alexander; Garniek, Alexander; Golan, Gil; Bensaid, Paul; Khaitovich, Boris; Abu-Salah, Kamel; Zissin, Rivka; Simon, Daniel; Konen, Eli [Tel-Aviv University, Sackler School of Medicine (Israel)

2009-01-15

290

Orientation columns in the mouse superior colliculus.  

PubMed

More than twenty types of retinal ganglion cells conduct visual information from the eye to the rest of the brain. Each retinal ganglion cell type tessellates the retina in a regular mosaic, so that every point in visual space is processed for visual primitives such as contrast and motion. This information flows to two principal brain centres: the visual cortex and the superior colliculus. The superior colliculus plays an evolutionarily conserved role in visual behaviours, but its functional architecture is poorly understood. Here we report on population recordings of visual responses from neurons in the mouse superior colliculus. Many neurons respond preferentially to lines of a certain orientation or movement axis. We show that cells with similar orientation preferences form large patches that span the vertical thickness of the retinorecipient layers. This organization is strikingly different from the randomly interspersed orientation preferences in the mouse's visual cortex; instead, it resembles the orientation columns observed in the visual cortices of large mammals. Notably, adjacent superior colliculus orientation columns have only limited receptive field overlap. This is in contrast to the organization of visual cortex, where each point in the visual field activates neurons with all preferred orientations. Instead, the superior colliculus favours specific contour orientations within ?30° regions of the visual field, a finding with implications for behavioural responses mediated by this brain centre. PMID:25517100

Feinberg, Evan H; Meister, Markus

2015-03-12

291

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...

292

UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITECNICA SUPERIOR  

E-print Network

´ECNICA SUPERIOR DEPARTAMENTO DE INGENIER´IA INFORM´ATICA TESIS DOCTORAL UNA PROPUESTA DE INCORPORACI´ON DE LOS cuenta esta caracter´istica. Estas investigaciones est´an motivadas por teor´ias educativas que sostienen

Autonoma de Madrid, Universidad

293

Significant Reading Experiences of Superior English Students.  

ERIC Educational Resources Information Center

Superior high school students (975 finalists in the NCTE Achievement Awards Program) were surveyed to find what one book was most significant to each of them in their high school experiences, and the reason for the significance. In response to questionnaires, the students cited 416 different titles, 72% of which were novels. The top 10 books were…

Whitman, Robert S.

1964-01-01

294

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

295

Synthetic organic toxicants in Lake Superior  

Microsoft Academic Search

Numerous synthetic organic toxicants have been reported in Lake Superior in the past quarter century although relatively few industrial centers are located on its shores. The chemicals enter the lake primarily through atmospheric deposition via transport from regional and distant sources. This contribution discusses research issues regarding the processes by which the chemicals enter and exit the lake, their in-lake

J. A. Perlinger; M. F. Simcik; D. L. Swackhamer

2004-01-01

296

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...

297

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 ...

298

Process based modeling of sedimentary basin properties - Peïra Cava Basin, SE France  

NASA Astrophysics Data System (ADS)

Session SSP 3.2/GMPV46 The Eocene-Oligocene Grès d'Annot Formation which crops-out in the Peïra Cava region of south-eastern France is a 1200 m thick succession of sandstones and mudstones deposited in a confined, synclinal sub-basin plunging to the north. The Peïra Cava turbidite system is dominated by interceded high- and low-concentration turbidity deposits with several marker beds that can be correlated throughout the basin fill, providing a robust stratigraphic framework for analysis (Amy et al, 2007). Using deterministic process based simulations it is possible to recreate the flow events that deposited the basin fill. The aim of the present study to utilize this methodology and investigate the role of the confinement, relief, and the size of the turbidity currents events required to reproduce the observed stratigraphy. MassFLOW-3D is a 3D Computational Fluid Dynamic (CFD) software for the numerical simulation of the physical equations describing fluid flow and sediment transport for turbidity currents. Flows are simulated on a structural restored, back-stripped and decompacted palaeo-bathymetry. The sedimentary infilling was the results of 18 major events (the marker units of Amy et al, 2007) and many thousands of minor ones. Each stratigraphic package includes a major flow and numerous minor ones having similar characteristics (flow entry point, sediment species and concentration, velocity inlet). The numerical modelling aimed to reproduce these 10 major units as the result of 10 major gravity flows. The different boundary conditions, such as the turbidity current inflow dimensions, inlet velocity, grain size and sand concentration used were based on outcrop observations and analysis found in the literature. Comparison of the depositional results to the outcrop can highlight topographic issues but also validate the choice of palaeobathymetry. Overall good match were found with correct areas of erosion, bypass and deposition regarding outcrop observations. The fill of this basin initiated with deposition that was ponded within topographic lows and the earliest units are less continuous than the subsequent, more sheet like deposits. There was a clear up-slope back-lap of the basin fill and the retrogradation of the base of slope caused a reduction in the degree of erosion by successive surges (flow events) at the slope to basin transition. Reflection and refraction effects can be observed numerically as it had been observed in the outcrop (Amy et al, 2007). The process based modelling was able to reproduce the distribution of deposits observed in the outcrop. This suggests that while non-uniqueness may be an issue, the assumptions made for flow size, flow velocity, sediment concentration, surge time and grain size were reasonable. Modelling the stratigraphy as 10 discrete surges rather than several thousand beds does not appear to have impacted the ability to reproduce the large scale stratigraphic architecture and mimic the fill of the basin. It does not capture however the distribution of bed scales heterogeneities. The modelling process is sensitive to the palaeo-bathymetric surface that is used.

Rouzairol, Romain; Basani, Riccardo; Hansen, Ernst; Aas, Tor Even; Howell, John

2013-04-01

299

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

300

Gross haematuria associated with penetration of an inferior vena cava filter into the right renal collecting system.  

PubMed

Inferior vena cava (IVC) filters are a viable alternative for patients with venous thromboembolic disease for whom standard anticoagulation therapy is contraindicated. Rare complications associated with their use, however, include misplacement and IVC penetration. We report a case of a 63-year-old woman who developed gross haematuria following IVC filter penetration into both the right renal collecting system and renal pelvis, for which open caval removal and reconstruction was required. This is an unusual case of IVC filter penetration causing symptomatic haematuria and requiring surgical intervention. PMID:25750222

Cusano, Antonio; Rosenberg, David; Haddock, Peter; Meraney, Anoop

2015-01-01

301

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

302

Open surgical inferior vena cava filter retrieval for caval perforation and a novel technique for minimal cavotomy filter extraction.  

PubMed

Late complications of retrievable inferior vena cava (IVC) filters resulting from IVC perforation and erosion into adjacent structures is an increasingly frequent phenomena. We describe six cases of open filter explantation for IVC penetration and offer a novel technique for open filter removal without the need for an extensive cavotomy. All patients had radiographic evidence of filter erosion into pericaval structures requiring open surgical filter explant. Four of the six patients underwent minimal cavatomy filter extraction, eliminating the need for caval reconstruction. PMID:22503185

Connolly, Peter H; Balachandran, Vinod P; Trost, David; Bush, Harry L

2012-07-01

303

Bedside placement of a retrievable inferior vena cava filter in a morbidly obese patient guided by modified IVUS approach.  

PubMed

Deep vein thrombosis and pulmonary embolism are major causes of morbidity and mortality in trauma patients. Anticoagulation therapy is often contraindicated in these patient populations. The retrievable inferior vena cava (IVC) filter provides a good option for preventing pulmonary embolism in the immediate injury and postoperative periods. Bedside IVC filter placement by guidance of intravascular ultrasound eliminates the risk of transportation; it is safe, efficient, and cost effective. We hereby present a case of bedside IVC filter placement in a morbidly obese patient with modified intravascular ultrasound approach. PMID:23220991

Patel, Nishit; Saucedo, Jorge

2012-12-01

304

[Effect of parameters of myrmecochorous syndrome on rates of removal of Corydalis cava and Pulmonaria obscura by Formica polyctena ants].  

PubMed

Complex of adaptations of myrmecochorous plants to the ant dispersal composes so called myrmecochorous syndrome. To study the effect of some morphological and anatomical adaptations on diaspore attractiveness for ants, the field experiments with diaspores and their extracts were carried out. It was shown that chemical cues attracting ants are located in different parts of diaspores: in elaiosome only (C. cava) or in elaiosome, coverage of external layer of the fruit and in the fruit collar (P. obscura). Anatomy of adaptive structure of diaspores is also discussed together with the results of field experiments. PMID:11544770

Gorb, E B; Gorb, S N

2001-01-01

305

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

306

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

307

Transcatheter thrombolytic therapy for symptomatic thrombo-occlusion of inferior vena cava filter  

PubMed Central

Thrombus within an inferior vena cava (IVC) filter reduces filter patency and venous return from the lower extremities, and may progress to complete IVC occlusion. The clinical experiences and outcomes of transcatheter thrombolytic therapy for symptomatic IVC thrombosis following filter implantation have not been widely reported. The aim of the current study was to evaluate the efficiency and safety of trans-catheter thrombolysis for the treatment of symptomatic IVC thrombosis in patients with implanted IVC filters. Transcatheter thrombolysis was used to treat 5 patients with thrombosis of the filter-bearing IVC causing symptoms in 10 limbs from October 2005 to September 2010. The patients were implanted with a second IVC filter through the right internal jugular vein, followed by recanalization of the occluded IVC and intravenous transcatheter thrombolysis. The IVC filters were retrieved through the femoral or right internal jugular vein after the thrombus had dissolved. Technical and clinical outcome, complications and postoperative pulmonary embolism were monitored. A total of 5 filters were implanted and 6 filters were retrieved later. Technically and clinically successful recanalization and thrombolysis were achieved in 5 of 5 patients and 10 of 10 symptomatic limbs. The median thrombolysis period was 13 days (range, 8–14 days). The median dwell time for the filters that were removed was 50.5 days (range, 14–73 days). No major bleeding occurred during the current study. During clinical follow-up, no clinically detectable pulmonary embolism was observed. Endovascular recanalization and transcatheter thrombolysis of IVC thrombosis are efficient, feasible and safe in the presence of an IVC filter. PMID:23403505

XIAO, LIANG; SHEN, JING; TONG, JIA-JIE; ZHANG, ZHE; MU, XIAO-LIN; YI, ZHENG-JIA; BAI, SHUO; XU, KE

2013-01-01

308

Retrospective analysis of the use of inferior vena cava filters in routine hospital practice  

PubMed Central

Introduction Characteristics and outcomes of patients undergoing inferior vena cava (IVC) filter insertion are not well reported. Particularly, the role of long term anticoagulation in these patients is unclear. Aims (1) To describe in a cohort of patients undergoing IVC filter insertion, underlying diseases, indications for filter insertion, complications, and survival. (2) To determine the effect of long term anticoagulant treatment on thromboembolism and patient survival. Study design A retrospective analysis of 109 consecutive patients undergoing IVC filter insertion in two university hospitals. Results Average age was 67.4 years. Median duration of follow up was two years. Indications for IVC filter insertion were: contraindication to anticoagulation (n?=?61, 56%), prophylactic insertion (n?=?29, 27%), thromboembolism while receiving adequate anticoagulation (n?=?17, 15%), and non?compliance with anticoagulation (n?=?2, 2%). Insertion related complications were groin haematoma in four patients (3.5%) and localised infection at the puncture site in one patient (0.9%). Fifty six patients (51.4%) died during the study period. Of these, 22 received long term anticoagulants and 34 did not. Overall and thrombosis free survival was greater in the anticoagulant treated group (median survival not reached) than in the untreated group (median survival?=?12?months). Patients not receiving long term anticoagulation after IVC filter insertion were nearly 2.5?fold more likely to die or experience venous thromboembolism. Conclusion IVC filter insertion was a safe procedure and was performed for appropriate indications in the patients studied. In patients surviving for longer than 30?days, prolonged administration of oral anticoagulants was associated with improved survival with no significant increase in haemorrhagic complications. PMID:16461480

Dovrish, Z; Hadary, R; Blickstein, D; Shilo, L; Ellis, M H

2006-01-01

309

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

310

Improved removal rates for retrievable inferior vena cava filters with the use of a 'filter registry'.  

PubMed

The American Association for the Surgery of Trauma challenged the trauma community to improve a 22 per cent average removal rate for retrievable inferior vena cava filters (r-IVCFs). Since 2006, we maintained a "filter registry" documenting all IVCFs placed in trauma patients. Our goal was to improve removal rates for r-IVCF. Patients receiving an IVCF before implementation of filter registry, 2003-2005, comprised the control group. Patients receiving an IVCF after implementation of filter registry, 2006-2009, comprised the study group. Data obtained included age, gender, Injury Severity Score (ISS), length of stay (LOS), mortality, filter inserted, placement indication, removal rates, and reasons why removal did not occur. Fisher exact test and chi square were used for nominal variables. Stepwise logistic regression analysis was used to define predictors of removing and not removing an IVCF. Three hundred seven patients received an IVCF, 142 preregistry and 165 postregistry. No significant difference existed between groups in age, gender, ISS, placement indication, or mortality. A significant difference existed between groups in LOS and presence of deep vein thrombosis (DVT) and pulmonary embolism. A total of 98.2 per cent of postregistry patients received a Günther Tulip filter and all retrievals were performed by Interventional Radiology. Retrieval rates improved, 15.5 to 31.5 per cent post registry (P < 0.001). No differences existed in lost to follow-up (LTF) between groups. Univariate analysis identified age, IVC clot, DVT, and LTF as predictors for not removing a filter. Stepwise logistic regression revealed the filter registry independently predicts the removal of an r-IVCF. A filter registry is effective in improving rates of removal for r-IVCFs. PMID:22273323

Kalina, Michael; Bartley, Marilyn; Cipolle, Mark; Tinkoff, Glen; Stevenson, Scott; Fulda, Gerard

2012-01-01

311

Transcatheter thrombolytic therapy for symptomatic thrombo-occlusion of inferior vena cava filter.  

PubMed

Thrombus within an inferior vena cava (IVC) filter reduces filter patency and venous return from the lower extremities, and may progress to complete IVC occlusion. The clinical experiences and outcomes of transcatheter thrombolytic therapy for symptomatic IVC thrombosis following filter implantation have not been widely reported. The aim of the current study was to evaluate the efficiency and safety of trans-catheter thrombolysis for the treatment of symptomatic IVC thrombosis in patients with implanted IVC filters. Transcatheter thrombolysis was used to treat 5 patients with thrombosis of the filter-bearing IVC causing symptoms in 10 limbs from October 2005 to September 2010. The patients were implanted with a second IVC filter through the right internal jugular vein, followed by recanalization of the occluded IVC and intravenous transcatheter thrombolysis. The IVC filters were retrieved through the femoral or right internal jugular vein after the thrombus had dissolved. Technical and clinical outcome, complications and postoperative pulmonary embolism were monitored. A total of 5 filters were implanted and 6 filters were retrieved later. Technically and clinically successful recanalization and thrombolysis were achieved in 5 of 5 patients and 10 of 10 symptomatic limbs. The median thrombolysis period was 13 days (range, 8-14 days). The median dwell time for the filters that were removed was 50.5 days (range, 14-73 days). No major bleeding occurred during the current study. During clinical follow-up, no clinically detectable pulmonary embolism was observed. Endovascular recanalization and transcatheter thrombolysis of IVC thrombosis are efficient, feasible and safe in the presence of an IVC filter. PMID:23403505

Xiao, Liang; Shen, Jing; Tong, Jia-Jie; Zhang, Zhe; Mu, Xiao-Lin; Yi, Zheng-Jia; Bai, Shuo; Xu, Ke

2013-02-01

312

Clinical Outcome after Intrahepatic Venous Stent Placement for Malignant Inferior Vena Cava Syndrome  

SciTech Connect

We evaluated the clinical outcome of malignant inferior vena cava (IVC) syndrome after intrahepatic IVC stent placement by retrospective analysis of 50 consecutive patients (25 men, 25 women, age 32-83 years) with malignant IVC syndrome who were treated with intrahepatic stent placement. Gianturco-Rosch-Z (GRZ) stents (n = 45), and Wallstents (n = 5) were inserted. Clinical outcome was assessed from patients' records using a score based on leg swelling, scrotal/vulvar edema, ascites and anasarca before and after stent placement, as well as at last follow-up visit before death. Clinical follow-up was supplemented by duplex sonography in 36 patients. Inferior venocavography was performed in 5 patients prior to re- intervention. Follow-up time ranged from 1 to 932 days (mean 62 days). Mean pressure gradient in the IVC was reduced from 14 {+-} 4.1 mmHg before to 2.9 {+-} 3.2 mmHg after stent placement (p < 0.001). Four patients had stent occlusion, 2 of whom were successfully re-stented. Primary and secondary patency was 59% and 100%, respectively at 540 days. Immediate clinical data were available in 44 patients: 38 improved; 6 did not respond. Last follow-up visit data were available in 36 patients: 24 showed persistent symptom relief till death. All symptom scores were significantly improved after stent placement (p < 0.001) and with the exception of ascites, remained significantly improved (p < 0.05) until the last follow-up. Increased serum bilirubin was a common characteristic of clinical failures and recurrences. Intrahepatic IVC stent placement resulted in significant symptomatic relief in patients with malignant IVC syndrome. Palliation was effective even in patients with a very short life expectancy.

Brountzos, Elias N.; Binkert, Christoph A.; Panagiotou, Irene E.; Petersen, Bryan D.; Timmermans, Hans; Lakin, Paul C. [Dotter Interventional Institute, Oregon Health Sciences University, 3181 S.W. Sam Jackson Park Road, L342, Portland OR 97201-3098 (United States)

2004-03-15

313

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

314

[Investigation of fetal arrhythmias by simultaneous recording of ascending aortic and superior vena caval blood flow].  

PubMed

In a period of 18 consecutive months, all the foetus referred to our Foetal Cardiology Unit for investigation of arrhythmia were systematically assessed by M mode echocardiography and simultaneous recording of blood flow in the superior vena cava and the aorta (SVC/Ao). This study was undertaken to compare the performance of these two approaches. The foetus were classified into three groups according to the arrhythmia diagnosed: Group 1: irregular arrhythmias, Group 2: bradycardias, Group 3: tachycardias. A surface ECG was recorded in all the neonates in whom the arrhythmias persisted. In Group 1, including 50 cases of extrasystoles (49 atrial and 1 ventricular), M mode echo and the Doppler provided the diagnosis in 42 and 47 cases respectively. This difference was not statistically significant. Group 2 comprised four cases of bradycardia (2 blocked atrial bigeminy, 2 complete atrioventricular blocks); the two methods provided the diagnosis in all 4 cases. Group 3 comprised 11 cases including 7 supraventricular tachycardias (SVT), 2 flutter, 1 chaotic atrial rhythm and 1 ectopic junctional rhythm. Complete analysis of these arrhythmias was possible by M mode in 4 cases and by Doppler in all cases. This difference was significant. The distribution of the 7 cases of SVT with respect to the duration of the ventriculoatrial interval was possible by M mode in 2 cases and in all cases by Doppler. This was a decisive factor in the choice of antiarrhythmic therapy. The authors conclude that Doppler and M mode are two echocardiographic approaches which are equally effective in the investigation of foetal atrial extrasystoles and probably of sustained foetal bradycardia. However, Doppler recording of SVC/Ao gives a more detailed and precise diagnosis of more complex foetal arrhythmias. PMID:11725711

Fouron, J C; Proulx, F; Gosselin, J; Infante-Rivard, C

2001-10-01

315

Anterior approach to the superior mesenteric artery by using nerve plexus hanging maneuver for borderline resectable pancreatic head carcinoma.  

PubMed

To achieve R0 resection for pancreatic ductal adenocarcinoma (PDAC) of the pancreatic head, complete resection of the retropancreatic nerve plexus around the superior mesenteric artery (SMA) is thought to be required. Twenty-five patients with borderline resectable right-sided PDAC were divided into two groups after neoadjuvant chemoradiotherapy: those with portal vein (PV) invasion alone (n?=?12), and those with invasion of both PV and SMA (n?=?13). A tape for guidance was passed in a space ventral to the SMA and behind the pancreatic parenchyma, followed by resection of the pancreatic parenchyma with the splenic vein. Another tape was passed behind the nerve plexus lateral to the hepatic artery and the SMA ventral to the inferior vena cava and the nerve plexus was dissected, resulting in complete resection of the nerve plexus around the SMA. Pathological findings revealed that the rates of R0, R01 (a margin less than 1 mm) and R1 were 58.3 %, 41.7 % and 0 % in PV group, and 53.8 %, 30.8 % and 15.4 % in PV/A group, respectively. The median survival time was 23.3 and 22.8 months in PV and PV/A groups, respectively. The plexus hanging maneuver for PDAC of the pancreatic head achieved complete resection of the retropancreatic nerve plexus around the SMA, helping to secure a negative surgical margin. PMID:24664421

Mizuno, Shugo; Isaji, Shuji; Tanemura, Akihiro; Kishiwada, Masashi; Murata, Yasuhiro; Azumi, Yoshinori; Kuriyama, Naohisa; Usui, Masanobu; Sakurai, Hiroyuki; Tabata, Masami

2014-06-01

316

Hyaluronan-based scaffold for in vivo regeneration of the rat vena cava: Preliminary results in an animal model.  

PubMed

The aim of this study was to develop a prosthetic graft that could perform as a small-diameter vascular conduit for vein regeneration. The difficulty of obtaining significant long-term patency and good wall mechanical strength in vivo has been a significant obstacle in achieving small-diameter vein prostheses. Fifteen Male Wistar rats weighing 250-350 g were used. Tubular structures of hyaluronan (HYAFF-11 tubules, 2 mm diameter, and 1.5 cm length) were implanted in the vena cava of rats as temporary absorbable guides to promote regeneration of veins. Performance was assessed at 30, 60, and 90 days after surgery by histology (hematoxylin-eosin and Weighert solution) and immunohistochemistry (antibodies to von Willebrand factor and to Myosin Light-Chain Kinase). These experiments resulted in two novel findings: (1) sequential regeneration of vascular components led to complete vein wall regeneration 30 days after surgery; (2) the biomaterial used created the ideal environment for the delicate regeneration process during the critical initial phases, yet its biodegradability allowed for complete degradation of the construct 4 months after implantation, at which time, a new vein remained to connect the vein stumps. This work demonstrates the complete vena cava regeneration inside the hyaluronic acid-based prosthesis, opening new perspective of microsurgical applications, like replantation of the upper limb, elongation of vascular pedicle of free flaps, cardiovascular surgery, and pediatric microvascular surgery. PMID:19827106

Pandis, Laura; Zavan, Barbara; Abatangelo, Giovanni; Lepidi, Sandro; Cortivo, Roberta; Vindigni, Vincenzo

2010-06-15

317

Step-by-step vascular control for extracapsular resection of complex giant liver hemangioma involving the inferior vena cava.  

PubMed

Massive hemorrhage remains an important clinical problem in extracapsular resection of giant liver hemangiomas (GLHs), especially for those involving the proximal hepatic veins and/or inferior vena cava. Between July 2004 and March 2012, 87 patients with a complex GLH scheduled for surgical treatment were included in this study. All patients were underwent vascular preparation (Step 1), advanced hepatic artery clamping (Step 2), and stepwise vascular occlusion (Step 3). Intraoperative blood loss, blood transfusion volume, degree of ischemia-reperfusion injury, and postoperative complications were recorded. No patients required urgent vascular preparation to manage intraoperative bleeding. In total, 87, 64, and 21 patients had portal triad (PT), infrahepatic inferior vena cava (IVC), and suprahepatic IVC preparation; and 17, 43, and 11 patients had PT, PT and suprahepatic IVC, and all three (PT, infra-, and suprahepatic IVC) occlusions. The PT, infrahepatic IVC, and SIVC occlusion times were 12.1 ± 3.7 minutes, 7.9 ± 2.4 minutes, and 3.2 ± 1.4 minutes, respectively. Mean blood loss was 291.9 ± 124.5 mL, and only four patients received blood transfusions. No patients had life-threatening complications or died (Clavien-Dindo Grade 4, 5). Compared with paralleled studies, this technique has an advantage to decrease the blood loss in less liver ischemia time. For complex GLH resections, the described step-by-step vascular control technique was efficacious and feasible for controlling intraoperative bleeding. PMID:24401502

Dou, Lei; Meng, Wei-Shan; Su, Bao-Dong; Zhu, Peng; Zhang, Wei; Liang, Hui-Fang; Chen, Yi-Fa; Chen, Xiao-Ping

2014-01-01

318

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

319

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

320

COSEE Great Lakes Lake Superior Exploration Workshop  

NSDL National Science Digital Library

Teachers of grades 4-10 or informal settings and scientists from universities, federal agencies, state agencies, and not-for-profit organizations are invited to take part in innovative and cutting edge science education. Participants will experience the Lake Superior ecosystem firsthand with experts through: field and classroom activities, classroom activity idea sharing, learning how to use cutting edge research, data, and technology with their students, and making peer connections.

321

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

322

UNIVERSIDADE TECNICA DE LISBOA INSTITUTO SUPERIOR TECNICO  

E-print Network

UNIVERSIDADE T´ECNICA DE LISBOA INSTITUTO SUPERIOR T´ECNICO eCT - Biblioteca de Com´ercio Electr´onico No contexto das ´areas de com´ercio electr´onico e sistemas de gest~ao de conte´udo (CMS), analisam-se v´arias extens~oes de com´ercio electr´onico para CMS, com o objectivo de identi- ficar as suas caracter

da Silva, Alberto Rodrigues

323

Gamma rays produce superior seedless citrus  

SciTech Connect

Using gamma radiation, seedless forms of some varieties of oranges and grapefruit are being produced. Since it has long been known that radiation causes mutations in plants and animals, experiments were conducted to determine if seediness could be altered by exposing seeds or budwood to higher than natural doses of gamma radiation. Orange and grapefruit seeds and cuttings exposed to gamma rays in the early 1970's have produced trees that bear fruit superior to that now on the market.

Pyrah, D.

1984-10-01

324

[Successful embolectomy of the superior mesenteric artery].  

PubMed

Successful embolectomy of the superior mesenteric artery in a 75-year-old man is reported. The decisive points in early diagnosis are discussed and the specific diagnostic methods for the correct decision are presented. The fulminant evolution of the disease leaves little time in which to decide. Early embolectomy brings about complete cure. It is a life-saving operation and there are no contraindications. PMID:734427

Zingher, E; Kaiser, A; Vogt, B

1978-12-16

325

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

326

Electronic Transport Properties of NdBiPt Carina Belvin1, Max Hirschberger2, Satya Kushwaha3, R. J. Cava3, and N. P. Ong2  

E-print Network

. Cava3, and N. P. Ong2 1Department of Physics, Wellesley College 2Department of Physics, PrincetonBiPt and TN = 2.2 K for NdBiPt · Half-Heusler crystal structure Methods Acknowledgments · Prof. N. P. Ong, Max · PCCM & PRISM at Princeton University · MRSEC NSF DMR 0819860 (PI: Prof. N. Phuan Ong) · REU Site Grant

Petta, Jason

327

Discovery of a Topological Insulator Bi2Se3 with a Single Surface Dirac Cone. (DMR-0819860) IRG-A: M. Z. Hasan and R. J. Cava  

E-print Network

Discovery of a Topological Insulator Bi2Se3 with a Single Surface Dirac Cone. (DMR-0819860) IRG-A: M. Z. Hasan and R. J. Cava In an ordinary insulator, such as diamond, the occupied electronic states field is applied. Recent research has uncovered a new class of insulators, called topological insulators

Petta, Jason

328

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

329

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

330

Use of retrievable compared to permanent inferior vena cava filters: a single-institution experience.  

PubMed

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 Günther 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. PMID:17955289

Van Ha, Thuong G; Chien, Andy S; Funaki, Brian S; Lorenz, Jonathan; Piano, Giancarlo; Shen, Maxine; Leef, Jeffrey

2008-01-01

331

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

332

'Recovery{sup TM}' Vena Cava Filter: Experience in 96 Patients  

SciTech Connect

The purpose of the study was to assess the clinical safety and efficacy of the 'Recovery{sup TM}' (Bard) inferior vena cava (IVC) filter. We retrospectively evaluated the clinical and imaging data of patients who had a 'Recovery{sup TM}' IVC filter placed between January 2003 and December 2004 in our institution. The clinical presentation, indications, and procedure-related complications during placement and retrieval were evaluated. Follow-up computed tomography (CT) examinations of the abdomen and chest were evaluated for filter-related complications and pulmonary embolism (PE), respectively. 'Recovery' filters were placed in 96 patients (72 males and 24 females; age range: 16-87 years; mean: 46 years). Twenty-four patients presented with PE, 13 with deep vein thrombosis (DVT) and 2 with both PE and DVT. The remaining 57 patients had no symptoms of thromboembolism. Indications for filter placement included contraindication to anticoagulation (n = 27), complication of anticoagulation (n = 3), failure of anticoagulation (n = 5), and prophylaxis (n = 61). The device was successfully deployed in the infrarenal (n = 95) or suprarenal (n = 1) IVC through a femoral vein approach. Retrieval was attempted in 11 patients after a mean period of 117 days (range: 24-426). The filter was successfully removed in nine patients (82%). Failure of retrieval was due to technical difficulty (n = 1) and the presence of thrombus in the filter (n = 1). One of the nine patients who had the filter removed developed IVC thrombus after retrieval and another had an intimal tear of the IVC. Follow-up abdominal CT (n = 40) at a mean of 80 days (range: 1-513) showed penetration of the IVC by the filter arms in 11, of which 3 had fracture of filter components. In one patient, a broken arm migrated into the pancreas. Asymmetric deployment of the filter legs was seen in 12 patients and thrombus within the filter in 2 patients. No filter migration or caval occlusion was encountered. Follow-up chest CT (n = 27) at a mean of 63 days (range: 1-386) showed PE in one patient (3%). During clinical follow-up, 12 of 96 patients developed symptoms of PE and only 1 of the 12 had PE on CT. There was no fatal pulmonary embolism in our group of patients following 'Recovery' filter placement. However, the current version of the filter is associated with structure weakness, a high incidence of IVC wall penetration, and asymmetric deployment of the filter legs.

Kalva, Sanjeeva P., E-mail: skalva@partners.org; Athanasoulis, Christos A.; Fan, C.-M.; Curvelo, Marcio; Geller, Stuart C.; Greenfield, Alan J.; Waltman, Arthur C.; Wicky, Stephan [Massachusetts General Hospital, Department of Radiology (United States)

2006-08-15

333

Top-Down Processing Top versus Bottom Word Superiority Effect  

E-print Network

1 Top-Down Processing Top versus Bottom Word Superiority Effect WORK K C/K C/K Sentence Superiority · Pre-attentional, parallel processing of features · Serial process of feature integration · Focused

Coulson, Seana

334

15. Stress Sheet, Truss number 2, span number 6, Superior ...  

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

15. Stress Sheet, Truss number 2, span number 6, Superior Avenue viaduct. Drawing courtesy Engineering Dept., City of Cleveland. - Superior Avenue Viaduct, Cleveland East & West side, Cuyahoga Valley Vicinity, Cleveland, Cuyahoga County, OH

335

Phoenix : Complex Adaptive System of Systems (CASoS) engineering version 1.0.  

SciTech Connect

Complex Adaptive Systems of Systems, or CASoS, are vastly complex ecological, sociological, economic and/or technical systems which we must understand to design a secure future for the nation and the world. Perturbations/disruptions in CASoS have the potential for far-reaching effects due to pervasive interdependencies and attendant vulnerabilities to cascades in associated systems. Phoenix was initiated to address this high-impact problem space as engineers. Our overarching goals are maximizing security, maximizing health, and minimizing risk. We design interventions, or problem solutions, that influence CASoS to achieve specific aspirations. Through application to real-world problems, Phoenix is evolving the principles and discipline of CASoS Engineering while growing a community of practice and the CASoS engineers to populate it. Both grounded in reality and working to extend our understanding and control of that reality, Phoenix is at the same time a solution within a CASoS and a CASoS itself.

Moore, Thomas W.; Quach, Tu-Thach; Detry, Richard Joseph; Conrad, Stephen Hamilton; Kelic, Andjelka; Starks, Shirley J.; Beyeler, Walter Eugene; Brodsky, Nancy S.; Verzi, Stephen J.; Brown, Theresa Jean; Glass, Robert John, Jr.; Sunderland, Daniel J.; Mitchell, Michael David; Ames, Arlo Leroy; Maffitt, S. Louise; Finley, Patrick D.; Russell, Eric Dean; Zagonel, Aldo A.; Reedy, Geoffrey E.; Mitchell, Roger A.; Corbet, Thomas Frank, Jr.; Linebarger, John Michael

2011-08-01

336

Complex Adaptive System of Systems (CASoS) Engineering Applications. Version 1.0.  

SciTech Connect

Complex Adaptive Systems of Systems, or CASoS, are vastly complex eco-socio-economic-technical systems which we must understand to design a secure future for the nation and the world. Perturbations/disruptions in CASoS have the potential for far-reaching effects due to highly-saturated interdependencies and allied vulnerabilities to cascades in associated systems. The Phoenix initiative approaches this high-impact problem space as engineers, devising interventions (problem solutions) that influence CASoS to achieve specific aspirations. CASoS embody the world's biggest problems and greatest opportunities: applications to real world problems are the driving force of our effort. We are developing engineering theory and practice together to create a discipline that is grounded in reality, extends our understanding of how CASoS behave, and allows us to better control those behaviors. Through application to real-world problems, Phoenix is evolving CASoS Engineering principles while growing a community of practice and the CASoS engineers to populate it.

Linebarger, John Michael; Maffitt, S. Louise (New Mexico Institute of Mining and Technology, Albuquerque, NM); Glass, Robert John, Jr.; Beyeler, Walter Eugene; Brown, Theresa Jean; Ames, Arlo Leroy

2011-10-01

337

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

338

Limitations of using synthetic blood clots for measuring in vitro clot capture efficiency of inferior vena cava filters.  

PubMed

The purpose of this study was first to evaluate the clot capture efficiency and capture location of six currently-marketed vena cava filters in a physiological venous flow loop, using synthetic polyacrylamide hydrogel clots, which were intended to simulate actual blood clots. After observing a measured anomaly for one of the test filters, we redirected the focus of the study to identify the cause of poor clot capture performance for large synthetic hydrogel clots. We hypothesized that the uncharacteristic low clot capture efficiency observed when testing the outlying filter can be attributed to the inadvertent use of dense, stiff synthetic hydrogel clots, and not as a result of the filter design or filter orientation. To study this issue, sheep blood clots and polyacrylamide (PA) synthetic clots were injected into a mock venous flow loop containing a clinical inferior vena cava (IVC) filter, and their captures were observed. Testing was performed with clots of various diameters (3.2, 4.8, and 6.4 mm), length-to-diameter ratios (1:1, 3:1, 10:1), and stiffness. By adjusting the chemical formulation, PA clots were fabricated to be soft, moderately stiff, or stiff with elastic moduli of 805 ± 2, 1696 ± 10 and 3295 ± 37 Pa, respectively. In comparison, the elastic moduli for freshly prepared sheep blood clots were 1690 ± 360 Pa. The outlying filter had a design that was characterized by peripheral gaps (up to 14 mm) between its wire struts. While a low clot capture rate was observed using large, stiff synthetic clots, the filter effectively captured similarly sized sheep blood clots and soft PA clots. Because the stiffer synthetic clots remained straight when approaching the filter in the IVC model flow loop, they were more likely to pass between the peripheral filter struts, while the softer, physiological clots tended to fold and were captured by the filter. These experiments demonstrated that if synthetic clots are used as a surrogate for animal or human blood clots for in vitro evaluation of vena cava filters, the material properties (eg, elastic modulus) and dynamic behavior of the surrogate should first be assessed to ensure that they accurately mimic an actual blood clot within the body. PMID:23690701

Robinson, Ronald A; Herbertson, Luke H; Sarkar Das, Srilekha; Malinauskas, Richard A; Pritchard, William F; Grossman, Laurence W

2013-01-01

339

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...

340

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

341

A rare opportunity for conservative treatment in a case of blunt trauma to the supradiaphragmatic inferior vena cava.  

PubMed

Injuries to the inferior vena cava (IVC) secondary to blunt trauma are rare and occur in only 1-10% of all blunt trauma patients. Management of these injuries has not been subjected to major studies, but several case reports and small retrospective studies have demonstrated that management can be tailored to the hemodynamic status of the patient; this is similar to the management of blunt liver injuries. Stable patients whose injuries have achieved local venous tamponade have been successfully treated without surgical intervention, while unstable patients require operative management. Regardless of patient status, however, IVC injuries are highly fatal with mortality rates between 70 and 90%. This report describes the case of a patient with a blunt traumatic injury to the supradiaphragmatic IVC with development of a pseudoaneurysm who was successfully managed conservatively. PMID:24968427

Matthees, Nicholas G; Mankin, James A; Kalinkin, Olga M; Richardson, Randy R

2013-01-01

342

A rare opportunity for conservative treatment in a case of blunt trauma to the supradiaphragmatic inferior vena cava  

PubMed Central

Injuries to the inferior vena cava (IVC) secondary to blunt trauma are rare and occur in only 1–10% of all blunt trauma patients. Management of these injuries has not been subjected to major studies, but several case reports and small retrospective studies have demonstrated that management can be tailored to the hemodynamic status of the patient; this is similar to the management of blunt liver injuries. Stable patients whose injuries have achieved local venous tamponade have been successfully treated without surgical intervention, while unstable patients require operative management. Regardless of patient status, however, IVC injuries are highly fatal with mortality rates between 70 and 90%. This report describes the case of a patient with a blunt traumatic injury to the supradiaphragmatic IVC with development of a pseudoaneurysm who was successfully managed conservatively. PMID:24968427

Matthees, Nicholas G.; Mankin, James A.; Kalinkin, Olga M.; Richardson, Randy R.

2013-01-01

343

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

344

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

345

Lumbar artery pseudoaneurysm in a patient with inferior vena cava filter and history of strenuous physical exercise.  

PubMed

Lumbar artery pseudoaneurysms (LAPs) are a rare complication of inferior vena cava (IVC) filters. The few reports in the literature describe treatment of patients presenting with ruptured LAPs. This case report describes the successful management of a symptomatic LAP because of an IVC filter, which initially presented as a retroperitoneal hematoma resulting from lumbar artery laceration by a filter strut. We hypothesize that the strenuous abdominal exercises performed by the patient may have facilitated IVC penetration by the filter, leading to development of a retroperitoneal hematoma and subsequent LAP. This case suggests that patients with IVC filters should avoid strenuous exercise and underscores the importance of timely retrieval of nonpermanent IVC filters. PMID:24246536

Tsekouras, Nikolaos; Whalen, Ralph C; Comerota, Anthony J

2015-03-01

346

Unusual approaches for insertion of the Greenfield vena cava filter: the value of its approach through the jugulosubclavian junction.  

PubMed

During the last four years, we have attempted 249 insertions of the Greenfield inferior vena cava filter using the right internal jugular vein. This approach was impossible in 31 patients (12.5%). Our first alternative was the insertion of the filter through the venous junction between the right internal jugular and right subclavian veins. If this latter technique was not possible we attempted the insertion of the Greenfield filter through the left internal jugular vein before using the retrograde femoral route which is associated with high morbidity. By these techniques we have been able to reduce the number of patients in whom it is impossible to achieve mechanical endocaval partial interruption to 2.4%. PMID:3504349

Combe, J; Destuynder, O; Poinsard, P; Combe, M; Milleret, P

1986-11-01

347

Retrievable inferior vena cava filters can be placed and removed with a high degree of success: Initial experience.  

PubMed

Objectives: Evaluate the success rate of retrievable inferior vena cava filter (IVC) removal in a tertiary care practice. Background: Retrievable IVC filters became readily available in the United States following Food and Drug Administration approval in 2003, and their use has increased dramatically. They represent an attractive option for patients with contraindications to anticoagulation who may only need short-term protection against pulmonary embolism. Methods: All patients who had undergone placement of a retrievable IVC filter at Mayo Clinic between 2003 and 2005 were retrospectively reviewed to evaluate our initial experience with retrievable inferior vena cava filters at a large tertiary care center. Results: During a three-year-period of time, Mayo Clinic, Rochester, MN placed 892 IVC filters, of which 460 were retrievable. Of the 460 retrievable filters placed (249 Günther Tulip®, 207 Recovery®, and 4 OptEase®), retrieval was attempted in 223 (48.5%). Of 223 initial attempts, 196 (87.9%) were initially successful and 27 (12.1%) were unsuccessful. Of the 27 unsuccessful initial retrieval attempts, 23 (85.2%) were due to the presence of significant thrombus within the filter and 4 (14.8%) were due to tilting and strut perforation. Of the 23 filters containing significant thrombus, 9 (39.1%) were later retrieved after a period of anticoagulation and resolution of the thrombus. Conclusions: Retrievable IVC filters can be removed with a high degree of success. Approximately one in ten retrievable IVC filter removal attempts may fail initially, usually because of significant thrombus within the filter. This does not preclude possible removal at a later date. © 2014 Wiley Periodicals, Inc. PMID:25367646

Cohoon, Kevin P; McBride, Joseph; Friese, Jeremy L; McPhail, Ian R

2014-11-01

348

[Unilateral congenital ptosis with ipsilateral superior rectus muscle overaction].  

PubMed

Congenital ptosis may be frequently accompanied by weakness of the ipsilateral superior rectus muscle. We report a case of ptosis with ipsilateral superior rectus muscle overaction. The 45-year-old patient presented with unilateral congenital ptosis. Ipsilateral superior rectus muscle overaction was found in the upgaze, with an inferior sclera show. This can be found in 40% of congenital ptosis. The authors give two possible causes: either an exaggerated Bell reflex or misdirection innervations of the superior rectus muscle by the superior division of the oculomotor nerve, initially innervating the upper eyelid elevator muscle. Histological or electrophysiological studies can be useful to determine the physiopathology of this association. PMID:21665327

Ben Rayana, N; Knani, L; Touzani, F; Ben Hadj Hamida, F

2011-09-01

349

Welcome to the Port of Duluth-Superior Duluth-Superior  

E-print Network

Projects via Port of Duluth's Lake Superior Warehousing Co. Hewitt, MN Trimont, MN New York Manufacturers at Port of Ust-Luga in Russia #12;Super Sacks of Ceramic Proppant for Hydraulic Fracturing headed to North New Salem, ND Pipestone, MN Bloomington, IL as of 12/12 Beulah, ND Kevin, MT Cimarron, KS Atlantic, IA

Minnesota, University of

350

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

351

Electrocochleographic findings in superior canal dehiscence syndrome.  

PubMed

This study evaluated the electrocochleographic findings of patients with superior canal dehiscence (SCD) syndrome and determined their diagnostic values and relationships with audiometric parameters. Thirteen symptomatic SCD patients (1 bilateral) confirmed by temporal bone computed tomography (TBCT) and cervical vestibular evoked myogenic potentials (cVEMP) were recruited. SCD sizes were measured on reformatted images in the plane of the superior canal (SC). Results of audiologic tests (audiometry, cVEMP, electrocochleography (ECoG)) for 14 affected and 12 contralateral unaffected ears were evaluated. Relationships between summating potential (SP) to action potential (AP) ratios, as measured by ECoG, and other audiometric parameters were evaluated. Sensitivity analysis of SP/AP ratios was performed by plotting receiver operating characteristic (ROC) curves for SCD syndrome patients and 19 age-matched healthy controls. Mean SP/AP ratio of SCD ears was significantly higher than that of unaffected ears (0.52 versus 0.25, p < 0.001) and SPs were significantly elevated in affected ears (p = 0.011), whereas APs were similar for affected and unaffected ears. SP/AP ratio showed a sensitivity of 92.3% and a specificity of 94.0% for distinguishing SCD syndrome patients given the inclusion criteria applied (symptoms, TBCT, cVEMP threshold) at a cutoff value of 0.34 (p < 0.001). SP/AP ratio was not correlated with SCD size or cVEMP threshold in affected ears. Negative absolute values of bone conduction at low frequency tended to increase with SP/AP ratio. Five out of 13 patients underwent surgical repair experienced symptomatic improvement with normalization of SP/AP ratios. ECoG appears to be a valuable diagnostic adjunct for functional demonstration of the third window in the otic capsule with high sensitivity and specificity, and thus, can support a clinical diagnosis of SCD when used in conjunction with clinical and radiological findings. PMID:25683209

Park, Joo Hyun; Lee, Sang Yeon; Song, Jae-Jin; Choi, Byung Yoon; Koo, Ja-Won

2015-05-01

352

Efficacy of pre-surgical axitinib for shrinkage of inferior vena cava thrombus in a patient with advanced renal cell carcinoma.  

PubMed

The authors present the first case report of pre-surgical axitinib treatment on primary renal tumor and vena cava thrombus. We report the case of a 78-year-old woman with renal cell carcinoma and inferior vena cava tumor thrombus, successfully downstaged with pre-surgical therapy with axitinib. A significant objective response was observed for tumor size and thrombus. After initiation of axitinib therapy, computed tomography showed a decrease, from 57 to 51 mm, in the maximal renal tumor diameter. The tumor thrombus had shortened to 42 mm and had moved to the inferior hepatic vein (Levels 4-3), thereby obviating the need for thoracotomy. The patient finally accepted surgical treatment. Our case was enabled to perform less surgery for advanced renal cell carcinoma with tumor thrombus using axitinib as a pre-surgical therapy. PMID:24571808

Sassa, Naoto; Kato, Masashi; Funahashi, Yasuhito; Maeda, Motohiro; Inoue, Satoshi; Gotoh, Momokazu

2014-04-01

353

Transjugular Intrahepatic Portosystemic Shunt Creation in Budd-Chiari Syndrome: Percutaneous Ultrasound-Guided Direct Simultaneous Puncture of the Portal Vein and Vena Cava  

SciTech Connect

Budd-Chiari syndrome (BCS) is an uncommon disorder that can be life-threatening, depending on the degree of hepatic venous outflow obstruction. Transjugular intrahepatic portosystemic shunt (TIPS) provides decompression of the congested liver but the hepatic vein obstruction makes the procedure more difficult. We describe a modified method that involved a single percutaneous puncture of the portal vein and inferior vena cava simultaneously for TIPS creation in a patient with BCS.

Boyvat, Fatih, E-mail: boyvatf@yahoo.com; Aytekin, Cueneyt; Harman, Ali; Ozin, Yasemin [Baskent University, Faculty of Medicine, Department of Radiology (Turkey)

2006-10-15

354

A Key Signature of Dirac Fermions IRG-A: Jun Xiong, Y.K. Luo, Y. H. Khoo, Shuang Jia, R. J. Cava and N. P. Ong,  

E-print Network

A Key Signature of Dirac Fermions IRG-A: Jun Xiong, Y.K. Luo, Y. H. Khoo, Shuang Jia, R. J. Cava by extrapolation to infinite field (1/B 0). Measurements to 45 Teslas on a crystal of Bi2Te2Se by Xiong et al. [1 from Dirac Fermions. 1) Jun Xiong, et al., Phys. Rev. B 86, 045314 (2012). Figure 1A Quantum

Petta, Jason

355

ARTIGO INTERNET Ensino superior faz 35% da investigao  

E-print Network

NewsSearch ARTIGO INTERNET Ensino superior faz 35% da investigação in http superior faz 35% da investigação O investimento na investigação científica continua a subir em Portugal. O Estatística (GPEARI) do Ministério da Ciência, Tecnologia e Ensino Superior, mostram uma cada vez maior

Instituto de Sistemas e Robotica

356

28 CFR 2.60 - Superior program achievement.  

Code of Federal Regulations, 2011 CFR

...Administration DEPARTMENT OF JUSTICE PAROLE, RELEASE, SUPERVISION AND RECOMMITMENT OF PRISONERS, YOUTH OFFENDERS, AND JUVENILE DELINQUENTS United States Code Prisoners and Parolees § 2.60 Superior program...

2011-07-01

357

28 CFR 2.60 - Superior program achievement.  

Code of Federal Regulations, 2014 CFR

...Administration DEPARTMENT OF JUSTICE PAROLE, RELEASE, SUPERVISION AND RECOMMITMENT OF PRISONERS, YOUTH OFFENDERS, AND JUVENILE DELINQUENTS United States Code Prisoners and Parolees § 2.60 Superior program...

2014-07-01

358

28 CFR 2.60 - Superior program achievement.  

Code of Federal Regulations, 2013 CFR

...Administration DEPARTMENT OF JUSTICE PAROLE, RELEASE, SUPERVISION AND RECOMMITMENT OF PRISONERS, YOUTH OFFENDERS, AND JUVENILE DELINQUENTS United States Code Prisoners and Parolees § 2.60 Superior program...

2013-07-01

359

Functioning pancreas graft with thromboses of splenic and superior mesenteric arteries after simultaneous pancreas-kidney transplantation: a case report.  

PubMed

Graft thrombosis is the most common cause of early graft loss after pancreas transplantation. The grafted pancreas is difficult to salvage after complete thrombosis, especially arterial thrombosis, and graft pancreatectomy is required. We describe a patient presenting with a functioning pancreas graft with thromboses of the splenic artery (SA) and superior mesenteric artery (SMA) after simultaneous pancreas-kidney transplantation (SPK). A 37-year-old woman with a 20-year history of type 1 diabetes mellitus underwent SPK. The pancreaticoduodenal graft was implanted in the right iliac fossa with enteric drainage. A Carrel patch was anastomosed to the recipient's right common iliac artery, and the graft gastroduodenal artery was anastomosed to the common hepatic artery using an arterial I-graft. The donor portal vein was anastomosed to the recipient's inferior vena cava. Four days after surgery, graft thromboses were detected by Doppler ultrasound without increases in the serum amylase and blood glucose levels. Contrast enhanced computed tomography revealed thromboses in the SA, splenic vein and SMA. Selective angiography showed that blood flow was interrupted in the SA and SMA. However, pancreatic graft perfusion was maintained by the I-graft in the head of the pancreas and the transverse pancreatic artery in the body and tail of the pancreas. We performed percutaneous direct thrombolysis and adjuvant thrombolytic therapy. However, we had to stop the thrombolytic therapy because of gastrointestinal hemorrhage. Thereafter, the postoperative course was uneventful and the pancreas graft was functioning with a fasting blood glucose level of 75 mg/dL, HbA1c of 5.1%, and serum C-peptide level of 1.9 ng/mL at 30 months post-transplantation. PMID:24767399

Matsumoto, I; Shinzeki, M; Asari, S; Goto, T; Shirakawa, S; Ajiki, T; Fukumoto, T; Ku, Y

2014-04-01

360

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

361

Multi-Objective Lake Superior Regulation  

NASA Astrophysics Data System (ADS)

At the direction of the International Joint Commission (IJC) the International Upper Great Lakes Study (IUGLS) Board is investigating possible changes to the present method of regulating the outflows of Lake Superior (SUP) to better meet the contemporary needs of the stakeholders. In this study, a new plan in the form of a rule curve that is directly interpretable for regulation of SUP is proposed. The proposed rule curve has 18 parameters that should be optimized. The IUGLS Board is also interested in a regulation strategy that considers potential effects of climate uncertainty. Therefore, the quality of the rule curve is assessed simultaneously for multiple supply sequences that represent various future climate scenarios. The rule curve parameters are obtained by solving a computationally intensive bi-objective simulation-optimization problem that maximizes the total increase in navigation and hydropower benefits of the new regulation plan and minimizes the sum of all normalized constraint violations. The objective and constraint values are obtained from a Microsoft Excel based Shared Vision Model (SVM) that compares any new SUP regulation plan with the current regulation policy. The underlying optimization problem is solved by a recently developed, highly efficient multi-objective optimization algorithm called Pareto Archived Dynamically Dimensioned Search (PA-DDS). To further improve the computational efficiency of the simulation-optimization problem, the model pre-emption strategy is used in a novel way to avoid the complete evaluation of regulation plans with low quality in both objectives. Results show that the generated rule curve is robust and typically more reliable when facing unpredictable climate conditions compared to other SUP regulation plans.

Asadzadeh, M.; Razavi, S.; Tolson, B.

2011-12-01

362

Facultad de Estudios Superiores Zaragoza Datos del plan de estudio  

E-print Network

deportiva: Futbol Asociación Dirigido a: Comunidad Universitaria en lo general y Zaragozana en particular y en caso de deportes como Futbol asociación, Tae Kwon do, Atletismo, lucha olímpica y Boxeo se abre

Islas, León

363

Facultad de Estudios Superiores Zaragoza Datos del plan de estudio  

E-print Network

deportiva: Futbol Rápido Dirigido a: Comunidad Universitaria en lo general y Zaragozana en particular y en caso de deportes como Futbol asociación, Tae Kwon do, Atletismo, lucha olímpica y Boxeo se abre

Islas, León

364

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.

365

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...

366

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

Federal Register 2010, 2011, 2012, 2013, 2014

...USCG-2012-0729] RIN 1625-AA00 Safety Zone; Superior Bay, Duluth, MN AGENCY: Coast Guard, DHS. ACTION: Temporary final rule...Sec. 165.T09-0729 Safety Zone; Superior Bay, Duluth, MN. (a) Location. The following area is a temporary safety...

2012-08-15

367

Bioaccumulation of Toxaphene Congeners in the Lake Superior Food Web  

Microsoft Academic Search

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

Derek C. G. Muir; D. Michael Whittle; David S. De Vault; Charles R. Bronte; Heidi Karlsson; Sean Backus; Camilla Teixeira

2004-01-01

368

33 CFR 117.495 - Superior Oil Canal.  

Code of Federal Regulations, 2013 CFR

... 1 2013-07-01 2013-07-01 false Superior Oil Canal. 117.495 Section 117.495 Navigation and Navigable...Specific Requirements Louisiana § 117.495 Superior Oil Canal. The draw of the S82 bridge, mile 6.3, in...

2013-07-01

369

33 CFR 117.495 - Superior Oil Canal.  

Code of Federal Regulations, 2011 CFR

... 1 2011-07-01 2011-07-01 false Superior Oil Canal. 117.495 Section 117.495 Navigation and Navigable...Specific Requirements Louisiana § 117.495 Superior Oil Canal. The draw of the S82 bridge, mile 6.3, in...

2011-07-01

370

33 CFR 117.495 - Superior Oil Canal.  

Code of Federal Regulations, 2014 CFR

... 1 2014-07-01 2014-07-01 false Superior Oil Canal. 117.495 Section 117.495 Navigation and Navigable...Specific Requirements Louisiana § 117.495 Superior Oil Canal. The draw of the S82 bridge, mile 6.3, in...

2014-07-01

371

33 CFR 117.495 - Superior Oil Canal.  

Code of Federal Regulations, 2012 CFR

... 1 2012-07-01 2012-07-01 false Superior Oil Canal. 117.495 Section 117.495 Navigation and Navigable...Specific Requirements Louisiana § 117.495 Superior Oil Canal. The draw of the S82 bridge, mile 6.3, in...

2012-07-01

372

33 CFR 117.495 - Superior Oil Canal.  

Code of Federal Regulations, 2010 CFR

... 1 2010-07-01 2010-07-01 false Superior Oil Canal. 117.495 Section 117.495 Navigation and Navigable...Specific Requirements Louisiana § 117.495 Superior Oil Canal. The draw of the S82 bridge, mile 6.3, in...

2010-07-01

373

Lake Superior LaMP: Lakewide Management Plan  

NSDL National Science Digital Library

The Environmental Protection Agency (EPA) and Environment Canada have posted a final report on the Lake Superior LaMP (Lakewide Management Plan). Available in English or French, the report covers Lake Superior History (Background and Chemistry), Pollutant Levels, and Management Goals. A host of appendices (.pdf format), figures, and tables provides summary statistics and supporting data.

374

UNIVERSIDAD DE GRANADA ESCUELA TECNICA SUPERIOR DE INGENIERIAS  

E-print Network

UNIVERSIDAD DE GRANADA ESCUELA T´ECNICA SUPERIOR DE INGENIER´IAS INFORM´ATICA Y DE TELECOMUNICACI CIENCIAS DE LA COMPUTACI´ON E INTELIGENCIA ARTIFICIAL ESCUELA T´ECNICA SUPERIOR DE INGENIER´IAS INFORM Departamento de Ingenier´ia de dicha Universidad, donde he pasado tan buenos ratos. Tambi´en agradezco a Mario

Granada, Universidad de

375

The Development of the Picture-Superiority Effect  

ERIC Educational Resources Information Center

When pictures and words are presented serially in an explicit memory task, recall of the pictures is superior. While this effect is well established in the adult population, little is known of the development of this picture-superiority effect in typical development. This task was administered to 80 participants from middle childhood to…

Whitehouse, Andrew J. O.; Maybery, Murray T.; Durkin, Kevin

2006-01-01

376

Water Quality of Streams Tributary to Lakes Superior and Michigan  

E-print Network

during freezeup when surface runoff was minimal. The pH values were highest from June to September559 Water Quality of Streams Tributary to Lakes Superior and Michigan Marine Biological Laboratory of Commercial Fisheries, H. E. Crowther, Director Wafer Quality of Streams Tributary to Lakes Superior

377

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

378

U IVERSIDAD AUTO OMA DE MADRID ESCUELA POLITEC ICA SUPERIOR  

E-print Network

U IVERSIDAD AUTO OMA DE MADRID ESCUELA POLITEC ICA SUPERIOR PROYECTO FI DE CARRERA PROYECTO DE Iglesias PO E TE: José María Martínez Sánchez Escuela Politécnica Superior Universidad Autónoma de Madrid, vehículos y objetos o materiales a un determinado escenario o establecimiento. · Interfonía y Emergencias

Autonoma de Madrid, Universidad

379

A comprehensive review of superior mesenteric artery syndrome  

Microsoft Academic Search

\\u000a Zusammenfassung  GRUNDLAGEN: Das Arteria mesenterica superior-Syndrom ist eine der seltensten gastrointestinalen Erkrankungen. Durch Kompression\\u000a des distalen Duodenums zwischen Arteria mesenterica superior und Aorta kommt es zu intestinaler Obstruktion. METHODIK: PubMed-Analyse\\u000a zu \\

M. T. Mandarry; L. Zhao; C. Zhang; Z. Q. Wei

2010-01-01

380

Crashworthy Seats Would Afford Superior Protection  

NASA Technical Reports Server (NTRS)

Seats to prevent or limit crash injuries to astronauts aboard the crew vehicle of the Orion spacecraft are undergoing development. The design of these seats incorporates and goes beyond crash-protection concepts embodied in prior spacecraft and racing-car seats to afford superior protection against impacts. Although the seats are designed to support astronauts in a recumbent, quasi-fetal posture that would likely not be suitable for non-spacecraft applications, parts of the design could be adapted to military and some civilian aircraft seats and to racing car seats to increase levels of protection. The main problem in designing any crashworthy seat is to provide full support of the occupant against anticipated crash and emergency-landing loads so as to safely limit motion, along any axis, of any part of the occupant s body relative to (1) any other part of the occupant s body, (2) the spacecraft or other vehicle, and (3) the seat itself. In the original Orion spacecraft application and in other applications that could easily be envisioned, the problem is complicated by severe limits on space available for the seat, a requirement to enable rapid egress by the occupant after a crash, and a requirement to provide for fitting of the seat to a wide range of sizes and shapes of a human body covered by a crash suit, space suit, or other protective garment. The problem is further complicated by other Orion-application-specific requirements that must be omitted here for the sake of brevity. To accommodate the wide range of crewmember body lengths within the limits on available space in the original Orion application, the design provides for taller crewmembers to pull their legs back closer toward their chests, while shorter crewmembers can allow their legs to stretch out further. The range of hip-support seat adjustments needed to effect this accommodation, as derived from NASA s Human Systems Integration Standard, was found to define a parabolic path along which the knees must be positioned. For a given occupant, the specific position along the path depends on the distance from the heel to the back of the knee. The application of the concept of parabolic adjustment of the hip-support structure caused the seat pan to also take on a parabolic shape, yielding the unanticipated additional benefit that the seat pan fits the occupant s buttocks and thighs more nearly conformally than do seat pans of prior design. This more nearly conformal fit effectively eliminates a void between the occupant s body and the seat pan, thereby helping to prevent what, in prior seat designs, was shifting of the occupant s body into that void during an impact.

Gohmert, Dustin

2009-01-01

381

[A case of a giant ovarian cyst anesthetized with the use of an inferior vena cava filter].  

PubMed

An intraperitoneal giant tumor can form deep venous thrombosis (DVT), leading to pulmonary embolism (PE) when it is removed. We report a case of a giant ovarian cystic tumor with possible DVT. A 52-year-old woman (149 cm in height, 85 kg in weight, and 150 cm in ventral girth) underwent the laparoscopic resection of the cyst. Preoperative angiography showed the obstruction of the inferior vena cava (IVC) just below the level of the right renal vein due to the compression by the tumor, and computed tomography suggested the existence of distal DVT. Anesthesia was induced with propofol and fentanyl, and the trachea was intubated using rocuronium. A permanent type IVC filter was placed near the obstruction site to prevent PE. Transesophageal echocardiography (TEE) was employed to detect the thrombotic echogram at the right atrium. Anesthesia was maintained with inhalation of sevoflurane and intravenous infusion of remifentanil. The content of the cyst (40.5 l) was suctioned slowly in about 50 min to avoid reexpansion pulmonary edema and circulatory collapse. Neither thrombotic echogram nor the acute decrease in end-tidal carbon dioxide pressure was observed throughout the anesthesia. Operation was performed uneventfully, and she recovered from anesthesia. We consider that IVC filters and TEE are useful to manage surgical patients with a huge ovarian cyst. PMID:23544338

Kameyama, Naomitsu; Mishima, Yasunori; Niiyama, Shuhei; Yamamoto, Yohsuke; Fukugasako, Hisato; Ushijima, Kazuo

2013-03-01

382

[Thrombosis of the inferior vena cava and right atrium: a rare complication of an amebic liver abscess in Dakar, Senegal].  

PubMed

The liver is the most common site of extra-intestinal amebiasis. Amebic liver abscesses can be complicated by rupture, migration to adjacent organs or, more rarely, vascular thrombosis. The purpose of this report is to describe the case of a 52-year-old Senegalese man hospitalized for painful hepatomegaly associated with asymmetric bilateral pulmonary consolidation and fever. Abdominal ultrasound revealed a large abscess in the left lobe of the liver with a non-obstructive thrombus extending from the inferior vena cava to the right atrium. Doppler cardiac ultrasound depicted extensive right atrial thrombus formation. Chest radiography showed opacities in both lungs. Sputum smear tests for tuberculosis were negative, but amebic serology was positive. Treatment consisted of a combination of antibiotics (metronidazole/amoxicillin/clavulanic acid), curative heparin therapy, and abscess drainage. Complications during treatment included thrombosis of the right chambers of the heart and a suspected pulmonary embolism. Outcome was favorable and the thrombi disappeared. The available literature confirms the rarity of this complication, which can have severe consequences due to embolism. PMID:22868736

Touré, P S; Léye, Y M; Diop, M M; El Fajri, S; Diop, M; Léye, A; Ka, M M

2012-01-01

383

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

384

Failed Retrieval of an Inferior Vena Cava Filter During Pregnancy Because of Filter Tilt: Report of Two Cases  

SciTech Connect

Thromboembolic disease during pregnancy is an important cause of obstetric morbidity and mortality. Pregnant patients with venous thromboembolism are usually managed by conventional anticoagulation. However, this must be discontinued during vaginal or caesarian delivery to avoid haemorrhage and to reduce the risk of possible epidural haematoma. Retrievable inferior vena cava filters (IVCFs) offer protection against pulmonary embolism during this high-risk period, when anticoagulation is discontinued, while avoiding potential long-term sequelae of a permanent IVCF. Here we report two patients who presented in the third trimester of pregnancy with floating ileofemoral deep vein thrombosis. Both patients were initially treated with standard anticoagulation; however, shortly before delivery both patients had a retrievable IVCF placed in a suprarenal position. In both patients, retrieval failed at 28 days after insertion because of filter tilt. The timing and mechanism of filter tilt remains uncertain. We believe that a number of factors could have been involved, including change in the anatomic configuration with lateral displacement of the IVCF as a result of the gravid uterus as well as forceful uterine contractions during labour, which modified the shape and diameter of the IVC. We showed that failure to retrieve the IVCF has had considerable implications for the two young patients regarding long-term anticoagulation and have highlighted the need for further clinical trials regarding the safe use of retrievable IVCFs during pregnancy.

McConville, R. M., E-mail: richard_mcconville@hotmail.com; Kennedy, P. T.; Collins, A. J.; Ellis, P. K. [Royal Victoria Hospital, Department of Radiology (Ireland)

2009-01-15

385

Semi-automated Tracking and Continuous Monitoring of Inferior Vena Cava Diameter in Simulated and Experimental Ultrasound Imaging.  

PubMed

Assessment of respirophasic fluctuations in the diameter of the inferior vena cava (IVC) is detrimentally affected by its concomitant displacements. This study was aimed at presenting and validating a method to compensate for IVC movement artifacts while continuously measuring IVC diameter in an automated fashion (with minimal interaction with the user) from a longitudinal B-mode ultrasound clip. Performance was tested on both experimental ultrasound clips collected from four healthy patients and simulations, implementing rigid IVC displacements and pulsation. Compared with traditional M-mode measurements, the new approach systematically reduced errors in caval index assessment (range over maximum diameter value) to an extent depending on individual vessel geometry, IVC movement and choice of the M-line (the line along which the diameter is computed). In experimental recordings, this approach identified both the cardiac and respiratory components of IVC movement and pulsatility and evidenced the spatial dependence of IVC pulsatility. IVC tracking appears to be a promising approach to reduce movement artifacts and to improve the reliability of IVC diameter monitoring. PMID:25638320

Mesin, Luca; Pasquero, Paolo; Albani, Stefano; Porta, Massimo; Roatta, Silvestro

2015-03-01

386

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

387

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

388

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

389

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

390

Neuromodulation of whisking related neural activity in superior colliculus.  

PubMed

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; Castro-Alamancos, Manuel A

2014-05-28

391

Absence of the superior petrosal veins and sinus: Surgical considerations  

PubMed Central

Background: The superior petrosal vein, one of the most constant and largest drainage pathways in the posterior fossa, may result in complications if occluded. This study calls attention to a unique variant in which the superior petrosal veins and sinus were absent unilaterally, and the venous drainage was through the galenic and tentorial drainage groups. Methods: This study examines one venogram and another anatomic specimen in which the superior petrosal vein and sinus were absent. Results: The superior petrosal veins, described as 1–3 bridging veins, emptying into the superior petrosal sinus, are the major drainage pathways of the petrosal group of posterior fossa veins. In the cases presented, the superior petrosal vein and sinus were absent and venous drainage was through the galenic and tentorial groups, including the lateral mesencephalic or bridging vein on the tentorial cerebellar surface. Conclusions: In cases in which the superior petrosal sinus and veins are absent, care should be directed to preserving the collateral drainage through the galenic and tentorial tributaries. Although surgical strategies for intraoperative management and preservation of venous structures are still controversial, knowledge of the possible anatomical variations is considered to be essential to improve surgical outcomes.

Matsushima, Ken; Ribas, Eduardo Santamaria Carvalhal; Kiyosue, Hiro; Komune, Noritaka; Miki, Koichi; Rhoton, Albert L.

2015-01-01

392

Long-term survival of patients with hepatocellular carcinoma with inferior vena cava tumor thrombus treated with sorafenib combined with transarterial chemoembolization: report of two cases and literature review  

PubMed Central

The prognosis of hepatocellular carcinoma (HCC) with tumor thrombus formation in the main vasculature is extremely poor. Sorafenib combined with transarterial chemoembolization is a novel treatment approach for advanced HCC. In this study, we report two HCC patients with inferior vena cava tumor thrombus who underwent the combination treatment. The overall survival times for these two patients were 44 months and 35 months, respectively. Our report suggests that sorafenib combined with transarterial chemoembolization may be a viable choice for patients with advanced HCC even with inferior vena cava tumor thrombus. Further studies are required to verify the efficacy and safety of this combination therapy for patients with advanced HCC with inferior vena cava tumor thrombus. PMID:24325788

Gao, Heng-Jun; Xu, Li; Zhang, Yao-Jun; Chen, Min-Shan

2014-01-01

393

MESTRADO EM MICROBIOLOGIA BIOTECNOLOGIA AMBIENTAL Instituto Superior Tcnico  

E-print Network

MESTRADO EM MICROBIOLOGIA BIOTECNOLOGIA AMBIENTAL ­ Instituto Superior Técnico Objectivos: Na risco ambiental), e sobre a aplicação de métodos da biotecnologia na resolução de problemas ambientais, desde a monitorização dos poluentes no Ambiente até à biorremediação nos compartimentos ambientais

Instituto de Sistemas e Robotica

394

DO GRAZING CATTLE SEEK NUTRITIONALLY SUPERIOR PORTIONS OF PASTURES?  

Technology Transfer Automated Retrieval System (TEKTRAN)

This study evaluated the hypothesis that grazing cattle will most often frequent nutritionally superior portions of large pastures. Forage quantity/quality characteristics were mapped among three pastures and cattle grazing patterns subsequently tracked with GPS collars. Cattle preferred locations...

395

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

396

FISH ASSEMBLAGES AS INDICATORS OF LAKE SUPERIOR COASTAL WETLAND CONDITION  

EPA Science Inventory

Fish assemblages associated with coastal wetlands in Lake Superior are poorly described. Understanding the environmental factors structuring the biota in these habitats is essential to developing robust indicators of their condition. To identify key environmental influences struc...

397

An SME's Perspective on Implementing the Superior Energy Performance Program  

E-print Network

The CCP Houston plant participating in the Texas pilot project is a synthetic resin manufacturing plant and has approximately 50 employees. As a participant in the Superior Energy Performance program, CCP tested the process heating system and steam...

Waz, P.

398

Brief Communications Superior Facial Expression, But Not Identity Recognition, in  

E-print Network

Brief Communications Superior Facial Expression, But Not Identity Recognition, in Mirror expressionontothesamesensorimotorrepresentationsthatareactiveduringtheexperienceoftheperceivedemotion.Toinvestigatethis view, the present study examines facial expression and identity recognition-touch synesthetes outperformed nonsynesthetic partic- ipants on measures of facial expression recognition

Duchaine, Bradley C.

399

Weak and Strong Superiorization: Between Feasibility-Seeking and ...  

E-print Network

Nov 27, 2014 ... between two research directions in the superiorization methodology that nourish from ... Life Sciences Problems, October 16-19, 2014, Constantza, Romania. ..... of Selected Topics in Signal Processing 1 (2007), 540—547.

User

2014-11-27

400

Facultad de Estudios Superiores Acatln Datos del plan de estudio  

E-print Network

Dirigido a: Profesionales que deseen desarrollarse en las áreas de comercio internacional, gestión aduanera y negocios internacionales. Empresarios relacionados al comercio internacional. Personas interesadasFacultad de Estudios Superiores Acatlán Datos del plan de estudio Diplomado: Comercio exterior

Islas, León

401

LIMNOLOGY OF MICHIGAN'S NEARSHORE WATERS OF LAKES SUPERIOR AND HURON  

EPA Science Inventory

Limnological assessments, including water and sediment chemistry, bacterial densities, zoo- and phyto-plankton and benthic macroinvertebrate community structure, and fish contaminants, were performed at 24 locations in Michigan's nearshore waters of Lakes Superior and Huron in 19...

402

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

403

Extensive Thrombotic Complications After Inferior Vena Cava Filter Placement in 2 Adolescents With Spinal Cord Injury: A Cautionary Tale and Review.  

PubMed

We report extensive thrombotic complications of inferior vena cava (IVC) filters that were placed for primary prophylaxis in 2 pediatric trauma patients with spinal cord injuries. Although thrombosis is a known common complication in adults with IVC filters, we were unable to find any reports in the literature of this complication in children. These cases highlight a significant problem with the use of prophylactic IVC filters that are not subsequently retrieved, particularly in young trauma patients with decades to live. The overall reported complications of IVC filters in the pediatric literature are also reviewed. PMID:25222057

Blevins, Erin; Raffini, Leslie

2014-09-12

404

Complete ablation of a renal tumor abutting the inferior vena cava using a radiofrequency electrode as a lever: a case report.  

PubMed

Radiofrequency ablation is accepted as a minimally invasive treatment for renal tumors in patients who are poor candidates for surgery. However, ablation of tumors that abut large vessels is likely to be incomplete due to the heat-sink effect or may result in vascular injury. We report a case of a renal tumor abutting the inferior vena cava, which was successfully treated with radiofrequency ablation, with an emphasis on the technical aspects required to avoid both incomplete ablation and vascular injury by using a radiofrequency electrode as a lever. PMID:19101852

Park, Byung Kwan; Kim, Chan Kyo

2009-03-01

405

Giant postnephrectomy arteriovenous fistula in a patient with tuberous sclerosis and anomalous inferior vena cava: treatment with amplatzer vascular plug embolization.  

PubMed

A case of 61-year-old woman with tuberous sclerosis complex, who developed a fistula between renal artery and renal vein after left-side nephrectomy, was presented. In addition, an abnormal course of inferior vena cava was detected (type 3 Morito). High-flow fistula was causing volume high output heart failure and pulmonary circulation overload with pulmonary hypertension. Because of large size of the fistula, it had to be treated with implantation of Amplatzer II to the renal artery. The procedure was successfully performed using the brachial artery access. PMID:24440446

Stefa?czyk, Ludomir; Religa, Wojciech; Kasprzak, Jaros?aw; Szymczyk, Konrad; Polguj, Micha?

2014-07-01

406

Right sided double inferior vena cava with obstructed retrocaval ureter: Managed with single incision multiple port laparoscopic technique using "Santosh Postgraduate Institute tacking ureteric fixation technique".  

PubMed

Right double inferior vena cava with obstructed retrocaval ureter is an extremely rare anomaly with only a few reported cases in the literature. To the best of our knowledge, this is the first case report describing ureteric repair by use of a single-incision laparoscopic technique. In addition, this report addresses the underlying surgical challenges of this repair and provides a brief review of the embryology of this anomaly. The "Santosh Postgraduate Institute ureteric tacking fixation technique" provides ease of end-to-end uretero-ureteric anastomosis in a single-incision laparoscopic surgery. PMID:25874048

Kumar, Santosh; Singh, Shivanshu; Garg, Nitin

2015-04-01

407

Right sided double inferior vena cava with obstructed retrocaval ureter: Managed with single incision multiple port laparoscopic technique using "Santosh Postgraduate Institute tacking ureteric fixation technique"  

PubMed Central

Right double inferior vena cava with obstructed retrocaval ureter is an extremely rare anomaly with only a few reported cases in the literature. To the best of our knowledge, this is the first case report describing ureteric repair by use of a single-incision laparoscopic technique. In addition, this report addresses the underlying surgical challenges of this repair and provides a brief review of the embryology of this anomaly. The "Santosh Postgraduate Institute ureteric tacking fixation technique" provides ease of end-to-end uretero-ureteric anastomosis in a single-incision laparoscopic surgery.

Singh, Shivanshu; Garg, Nitin

2015-01-01

408

Triphlorethol-A from Ecklonia cava Up-Regulates the Oxidant Sensitive 8-Oxoguanine DNA Glycosylase 1  

PubMed Central

This study investigated the protective mechanisms of triphlorethol-A, isolated from Ecklonia cava, against oxidative stress-induced DNA base damage, especially 8-oxoguanine (8-oxoG), in Chinese hamster lung fibroblast V79-4 cells. 8-Oxoguanine DNA glycosylase-1 (OGG1) plays an important role in the removal of 8-oxoG during the cellular response to DNA base damage. Triphlorethol-A significantly decreased the levels of 8-oxoG induced by H2O2, and this correlated with increases in OGG1 mRNA and OGG1 protein levels. Furthermore, siOGG1-transfected cell attenuated the protective effect of triphlorethol-A against H2O2 treatment. Nuclear factor erythroid 2–related factor 2 (Nrf2) is a transcription factor for OGG1, and Nrf2 combines with small Maf proteins in the nucleus to bind to antioxidant response elements (ARE) in the upstream promoter region of the OGG1 gene. Triphlorethol-A restored the expression of nuclear Nrf2, small Maf protein, and the Nrf2-Maf complex, all of which were reduced by oxidative stress. Furthermore, triphlorethol-A increased Nrf2 binding to ARE sequences and the resulting OGG1 promoter activity, both of which were also reduced by oxidative stress. The levels of the phosphorylated forms of Akt kinase, downstream of phosphatidylinositol 3-kinase (PI3K), and Erk, which are regulators of OGG1, were sharply decreased by oxidative stress, but these decreases were prevented by triphlorethol-A. Specific PI3K, Akt, and Erk inhibitors abolished the cytoprotective effects of triphlorethol-A, suggesting that OGG1 induction by triphlorethol-A involves the PI3K/Akt and Erk pathways. Taken together, these data indicate that by activating the DNA repair system, triphlorethol-A exerts protective effects against DNA base damage induced by oxidative stress. PMID:25353254

Kim, Ki Cheon; Lee, In Kyung; Kang, Kyoung Ah; Piao, Mei Jing; Ryu, Min Ju; Kim, Jeong Mi; Lee, Nam Ho; Hyun, Jin Won

2014-01-01

409

Efficacy of Lower-Extremity Venous Thrombolysis in the Setting of Congenital Absence or Atresia of the Inferior Vena Cava  

SciTech Connect

Purpose: A rare but described risk factor for deep venous thrombosis (DVT), predominately in the young, is congenital agenesis or atresia of the inferior vena cava (IVC). The optimal management for DVT in this subset of patients is unknown. We evaluated the efficacy of pharmacomechanical catheter-directed thrombolysis (PCDT) followed by systemic anticoagulation in the treatment of acute lower-extremity DVT in the setting of congenital IVC agenesis or atresia. Materials and Methods: Between November of 2005 and May of 2010, six patients (three women [average age 21 years]) were referred to our department with acute lower-extremity DVT and subsequently found to have IVC agenesis or atresia on magnetic resonance imaging. A standardized technique for PCDT (the Angiojet Rheolytic Thrombectomy System followed by the EKOS Microsonic Accelerated Thrombolysis System) was used for all subjects. Successful thrombolysis was followed by systemic heparinization with transition to Coumadin or low molecular-weight heparin and compression stockings. Subjects were followed-up at 1, 3, and then every 6 months after the procedure with clinical assessment and bilateral lower-extremity venous ultrasound. Results: All PCDT procedures were technically successful. No venous stenting or angioplasty was performed. The average thrombolysis time was 28.6 h (range 12-72). Two patients experienced heparin-induced thrombocytopenia, and one patient developed a self-limited knee hemarthrosis, No patients were lost to follow-up. The average length of follow-up was 25.8 {+-} 20.2 months (range 3.8-54.8). No incidence of recurrent DVT was identified. There were no manifestations of postthrombotic syndrome. Conclusions: PCDT followed by systemic anticoagulation and the use of compression stockings appears to be safe and effective in relatively long-term follow-up treatment of patients who present with acute DVT and IVC agenesis or atresia.

Ganguli, Suvranu, E-mail: sganguli@partners.org; Kalva, Sanjeeva; Oklu, Rahmi; Walker, T. Gregory; Datta, Neil [Massachusetts General Hospital and Harvard Medical School, Division of Vascular Imaging and Intervention, Department of Imaging (United States); Grabowski, Eric F. [Massachusetts General Hospital and Harvard Medical School, Division of Hematology and Oncology, Department of Pediatrics (United States); Wicky, Stephan [Massachusetts General Hospital and Harvard Medical School, Division of Vascular Imaging and Intervention, Department of Imaging (United States)

2012-10-15

410

Increased pulmonary vascular resistance and reduced stroke volume in association with CO2 retention and inferior vena cava dilatation.  

PubMed

Changes in cardiovascular parameters elicited during a maximal breath hold are well described. However, the impact of consecutive maximal breath holds on central hemodynamics in the postapneic period is unknown. Eight trained apnea divers and eight control subjects performed five successive maximal apneas, separated by a 2-min resting interval, with face immersion in cold water. Ultrasound examinations of inferior vena cava (IVC) and the heart were carried out at times 0, 10, 20, 40, and 60 min after the last apnea. The arterial oxygen saturation level and blood pressure, heart rate, and transcutaneous partial pressures of CO(2) and O(2) were monitored continuously. At 20 min after breath holds, IVC diameter increased (27.6 and 16.8% for apnea divers and controls, respectively). Subsequently, pulmonary vascular resistance increased and cardiac output decreased both in apnea divers (62.8 and 21.4%, respectively) and the control group (74.6 and 17.8%, respectively). Cardiac output decrements were due to reductions in stroke volumes in the presence of reduced end-diastolic ventricular volumes. Transcutaneous partial pressure of CO(2) increased in all participants during breath holding, returned to baseline between apneas, but remained slightly elevated during the postdive observation period (approximately 4.5%). Thus increased right ventricular afterload and decreased cardiac output were associated with CO(2) retention and signs of peripheralization of blood volume. These results indicate that repeated apneas may cause prolonged hemodynamic changes after resumption of normal breathing, which may suggest what happens in sleep apnea syndrome. PMID:16728515

Bakovi?, Darija; Eterovi?, Davor; Valic, Zoran; Saratlija-Novakovi?, Zana; Palada, Ivan; Obad, Ante; Duji?, Zeljko

2006-09-01

411

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

412

Superior sulcus lung tumors: Impact of local control on survival  

Microsoft Academic Search

Objectives: Our goal was to assess patient survival and response to treatment for superior sulcus tumors treated with combined radiation therapy and surgery when possible, or with radiation alone when surgery was not possible. Methods: Seventy-three patients were treated for primary non–small cell carcinoma of the superior pulmonary sulcus. Thirty-four patients received combined resection and irradiation. Thirty-nine patients who had

Michael P. Hagan; Noah C. Choi; Douglas J. Mathisen; John C. Wain; Cameron D. Wright; Hermes C. Grillo

1999-01-01

413

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

414

Superior Mesenteric Artery Embolism Treated with Percutaneous Mechanical Thrombectomy  

SciTech Connect

A case of acute superior mesenteric artery embolism treated with percutaneous thrombus aspiration is described. A 63-year-old man with chronic atrial fibrillation was admitted to the hospital with progressive abdominal pain. Computed tomography angiography revealed an occlusion of the distal part of the superior mesenteric artery. The patient was effectively treated using transaxillary percutaneous mechanical thrombectomy using a 6F Aspirex thrombectomy catheter.

Popovic, Peter, E-mail: peter.popovic@kclj.si; Kuhelj, Dimitrij [University Medical Centre Ljubljana, Institute of Radiology (Slovenia); Bunc, Matjaz [University Medical Centre Ljubljana, Clinical Department for Cardiology (Slovenia)

2011-02-15

415

The postdiction superiority effect in metacomprehension of text  

Microsoft Academic Search

Metacomprehension accuracy for texts was greater after, rather than before, answering test questions about the texts—a postdiction\\u000a superiority effect. Although postdiction superiority was found across successive sets of test questions and across successive\\u000a texts, there was no improvement in metacomprehension accuracy after participants had taken more tests. Neither prediction\\u000a nor postdiction gamma correlations with test performance improved with successive tests.

Benton H. Pierce; Steven M. Smith

2001-01-01

416

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

417

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

418

40 CFR 81.60 - Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Duluth (Minnesota)-Superior (Wisconsin) Interstate...Control Regions § 81.60 Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region. The Duluth (Minnesota)-Superior (Wisconsin)...

2012-07-01

419

40 CFR 81.60 - Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Duluth (Minnesota)-Superior (Wisconsin) Interstate...Control Regions § 81.60 Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region. The Duluth (Minnesota)-Superior (Wisconsin)...

2011-07-01

420

40 CFR 81.60 - Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Duluth (Minnesota)-Superior (Wisconsin) Interstate...Control Regions § 81.60 Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region. The Duluth (Minnesota)-Superior (Wisconsin)...

2013-07-01

421

The gray zone of the qualitative assessment of respiratory changes in inferior vena cava diameter in ICU patients  

PubMed Central

Introduction Transthoracic echocardiography (TTE) is a useful tool for minimally invasive hemodynamic monitoring in the ICU. Dynamic indices (such as the inferior vena cava distensibility index (dIVC)) can be used to predict fluid responsiveness in mechanically ventilated patients. Although quantitative use of the dIVC has been validated, the routinely used qualitative (visual) approach had not been assessed before the present study. Methods Qualitative and quantitative assessments of the dIVC were compared in a prospective, observational study. After operators with differing levels in critical care echocardiography had derived a qualitative dIVC, the last (expert) operator performed a standard, numeric measurement of the dIVC (referred to as the quantitative dIVC). Two groups of patients were separated into two groups: group (dIVC < 18%) and group (dIVC ? 18%). Results In total, 114 patients were assessed for inclusion, and 97 (63 men and 34 women) were included. The mean sensitivity and specificity values for qualitative assessment of the dIVC by an intensivist were 80.7% and 93.7%, respectively. A qualitative evaluation detected all quantitative dIVCs >40%. Most of the errors concerned quantitative dIVCs of between 15% and 30%. In the dIVC <18% group, two qualitative evaluation errors were noted for quantitative dIVCs of between 0 and 10%. The average of positive predictive values and negative predictive values for qualitative assessment of the dIVC by residents, intensivists and cardiologists were 83%, 83%, and 90%; and 92%, 94%, and 90%, respectively. The Fleiss kappa for all operators was estimated to be 0.68, corresponding to substantial agreement. Conclusion The qualitative dIVC is a rather easy and reliable assessment for extreme numeric values. It has a gray zone between 15% and 30%. The highest and lowest limitations of the gray area are rather tedious to define. Despite reliability of the qualitative assessment when it comes to extreme to numerical values, the quantitative dIVC measurement must always be done within a hemodynamic assessment for intensive care patients. The qualitative approach can be easily integrated into a fast hemodynamic evaluation by using portable ultrasound scanner for out-of-hospital patients. PMID:24423180

2014-01-01

422

Characterization and Formation of longitudinal pinch-out geometries in turbidite systems: the Peira Cava syncline (Annot Sandstone Formation)  

NASA Astrophysics Data System (ADS)

The Grès d'Annot sandstones of Late Eocene/early Oligocene is a well-known example of turbidite accumulations deposited in a foreland basin setting. In such settings, turbidite systems are usually laterally control by syntectonic activity generating lateral pinch-outs of the infilling accumulation against the basin walls. Such tectonic activity together with progradation and retrogradation stages of the whole turbidite system could also lead to local disconnection between the continental-slope and the basin deposits and to the formation of sealed potential sand-rich reservoirs. The aim of the work is to better constrain how turbidite systems pinch out longitudinally, in both upstream and downstream directions and to characterize some typical lithofacies evolutions. Our work focused on the Peîra Cava syncline (Maritime Alps, France) where particles are sourced from the Maures, Esterel and Corso-Sarde mountains and flow towards the north following structurally-controlled conduits. Thirty lithological logs 100-m thick were acquired following the western N170-trending side of the syncline. Correlations made between the various sections allowed reconstructing the topography of the top of the blue marls that existed before the emplacement of the turbidite accumulation. This reconstruction revealed the occurrence of two types of longitudinal pinch-out geometries against relatively high-slope angles, and trending either downcurrent or upcurrent. The strongest evolution of depositional facies is observed close to upstream pinch-out surfaces. Here, turbidite deposits thin and fine longitudinally while cohesive debris-flow deposits stop over distances as short as 200 m. Then, going upward in the serie above the pinch-out surface, both turbidite and debris-flow deposits are lesser affected and finally become continuous. These observations allowed defining a depositional model for gravity flows within a confined basin. It revealed similarities with the "fill and spill" model by Sinclair and Tomasso (2002), characterized by several stages of infilling. In a first stage, a pre-existing topography consisting in several depressions 1-2 km long controlled the longitudinal-facies evolution by blocking the highest-concentrated flows along their reverse-slope flanks. As the depression is infilled, flows are able to overtop the reverse-slope flank to settle down in the following depression. Once the pre-existing topography is buried, channelized bodies prograde within the basin with alternating incision and by pass processes. This work allowed us to better constrain the formation of longitudinal pinch-out surfaces during the first stages of a basin infilling and the impact of a pre-existing topography on the the deposition of thick sand-prone basin accumulations.

daghdevirenian, L. J.; Migeon, S.; Rubino, J.; Gorini, C.

2013-12-01

423

Characterization and Formation of longitudinal pinch-out geometries in turbidite systems: the Pïera Cava syncline (Annot Sandstone Formation)  

NASA Astrophysics Data System (ADS)

The Grès d'Annot sandstones of Late Eocene/early Oligocene is a well-known example of turbidite accumulations deposited in a foreland basin setting. In such settings, turbidite systems are usually laterally control by syntectonic activity generating lateral pinch-outs of the infilling accumulation against the basin walls. Such tectonic activity together with progradation and retrogradation stages of the whole turbidite system could also lead to local disconnection between the continental-slope and the basin deposits and to the formation of sealed potential sand-rich reservoirs. The aim of the work is to better constrain how turbidite systems pinch out longitudinally, in both upstream and downstream directions and to characterize some typical lithofacies evolutions. Our work focused on the Peîra Cava syncline (Maritime Alps, France) where particles are sourced from the Maures, Esterel and Corso-Sarde mountains and flow towards the north following structurally-controlled conduits. Thirty lithological logs 100-m thick were acquired following the western N170-trending side of the syncline. Correlations made between the various sections allowed reconstructing the topography of the top of the blue marls that existed before the emplacement of the turbidite accumulation. This reconstruction revealed the occurrence of two types of longitudinal pinch-out geometries against relatively high-slope angles, and trending either downcurrent or upcurrent. The strongest evolution of depositional facies is observed close to upstream pinch-out surfaces. Here, turbidite deposits thin and fine longitudinally while cohesive debris-flow deposits stop over distances as short as 200 m. Then, going upward in the serie above the pinch-out surface, both turbidite and debris-flow deposits are lesser affected and finally become continuous. These observations allowed defining a depositional model for gravity flows within a confined basin. It revealed similarities with the "fill and spill" model by Sinclair and Tomasso (2002), characterized by several stages of infilling. In a first stage, a pre-existing topography consisting in several depressions 1-2 km long controlled the longitudinal-facies evolution by blocking the highest-concentrated flows along their reverse-slope flanks. As the depression is infilled, flows are able to overtop the reverse-slope flank to settle down in the following depression. Once the pre-existing topography is buried, channelized bodies prograde within the basin with alternating incision and by pass processes. This work allowed us to better constrain the formation of longitudinal pinch-out surfaces during the first stages of a basin infilling and the impact of a pre-existing topography on the the deposition of thick sand-prone basin accumulations.

Daghdevirenian, Laurent; Migeon, Sébastien; Rubino, Jean-loup; Gorini, Christian

2014-05-01

424

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

425

Superior mesenteric vein thrombosis after laparoscopic sleeve gastrectomy.  

PubMed

Laparoscopic procedures for morbid obesity are becoming standard of care which, in experienced hands, has a very low mortality and morbidity. Superior mesenteric vein thrombosis has been reported in the literature after different bariatric and nonbariatric laparoscopic procedures. Laparoscopic sleeve gastrectomy is a relatively new procedure in the treatment of morbid obesity; its complications being well-known including staple line leak, bleeding, and stricture among others. We present a case of superior mesenteric vein thrombosis after laparoscopic sleeve gastrectomy successfully managed conservatively with therapeutic anticoagulation, and propose a different hypothesis for the development of such a complication. PMID:23917607

Pineda, Lucas; Sarhan, Mohammad; Ahmed, Leaque

2013-08-01

426

The postdiction superiority effect in metacomprehension of text.  

PubMed

Metacomprehension accuracy for texts was greater after, rather than before, answering test questions about the texts-a postdiction superiority effect. Although postdiction superiority was found across successive sets of test questions and across successive texts, there was no improvement in metacomprehension accuracy after participants had taken more tests. Neither prediction nor postdiction gamma correlations with test performance improved with successive tests. Although the results are consistent with retrieval hypotheses, they contradict predictions made by test knowledge hypotheses, which state that increasing knowledge of the nature of the tests should increase metacomprehension accuracy. PMID:11277465

Pierce, B H; Smith, S M

2001-01-01

427

Superior Mesenteric Artery Syndrome in a Patient with Cerebral Palsy  

PubMed Central

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

428

Surgical approach to the superior vestibular nerve in guinea pigs.  

PubMed

The superior vestibular nerve carries homo- and contra-lateral efferent fibers to the cochlea. The subarcuate fossa, a tube-like structure in the temporal bone of the guinea pig, can be used to reach the superior vestibular nerve at the level of the internal acoustic meatus. Normally, this structure accommodates the dorsal and ventral floccular extension of the cerebellum. This technique has several advantages. Firstly, a reduced cranial opening is necessary; secondly, less cerebellar tissue is sacrificed. Then there is the relative insulation of the operative field, and finally, it presents a straight guide to the internal auditory meatus and vestibular nerve. PMID:3446675

Hildesheimer, M; Muchnik, C; Rubinstein, M

1987-12-01

429

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

430

INSTITUTO SUPERIOR DE AGRONOMIA ESTATSTICA E DELINEAMENTO 2013/14  

E-print Network

frame. No nosso caso, esta segunda alternativa produz: > cor(Cereais) ano area ano 1.0000000 -0 conteúdo por razões de espaço): > Cereais ano area 1 1986 8789.69 2 1987 8972.11 3 1988 8388.94 4 1989 9075 (decrescente) entre anos e superfície agrícola dedicada à produção de cereais. Repare-se que o comando funciona

Lisboa, Universidade Técnica de

431

7. Photocopy of map (from Superior Court of Chatham County ...  

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

7. Photocopy of map (from Superior Court of Chatham County Land Records, Book 2G, p. 299) John McKinnon (County Surveyor), delineator 11 January 1817 PLAT OF SITE, SHOWING EASTERN PORTION OF BUILDING - William Taylor Store, 204 West Bay Street, Savannah, Chatham County, GA

432

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...

433

CALIDAD DE LA EDUCACIÓN MEDIA SUPERIOR EN MÉXICO  

Microsoft Academic Search

La esencia de la educación media superior en México, consiste en brindar a los estudiantes oportunidades de aprendizaje con calidad, independientemente del nivel económico, social o lugar de residencia. El presente documento contiene una investigación bibliográfica sobre la filosofía dedicada al concepto de calidad en el ámbito de la ingeniería y la producción, con el propósito por retomarse y adaptarse

Genaro Hernández Salazar

2009-01-01

434

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...

435

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...

436

Depth-specific Analyses of the Lake Superior Food Web  

EPA Science Inventory

Characteristics of large, deep aquatic systems include depth gradients in community composition, in the quality and distribution of food resources, and in the strategies that organisms use to obtain their nutrition. In Lake Superior, nearshore communities that rely upon a combina...

437

Visuospatial Superiority in Developmental Dyslexia: Myth or Reality?  

ERIC Educational Resources Information Center

Anecdotal evidence indicates that dyslexia is positively associated with superior visuospatial ability but empirical evidence is inconsistent. We explicitly tested the hypothesis that dyslexia is associated with visuospatial advantage in 20 dyslexic and 21 unimpaired adult readers using paper-and-pencil measures and tests of "everyday"…

Brunswick, Nicola; Martin, G. Neil; Marzano, Lisa

2010-01-01

438

Why Is Visual Search Superior in Autism Spectrum Disorder?  

ERIC Educational Resources Information Center

This study investigated the possibility that enhanced memory for rejected distractor locations underlies the superior visual search skills exhibited by individuals with autism spectrum disorder (ASD). We compared the performance of 21 children with ASD and 21 age- and IQ-matched typically developing (TD) children in a standard static search task…

Joseph, Robert M.; Keehn, Brandon; Connolly, Christine; Wolfe, Jeremy M.; Horowitz, Todd S.

2009-01-01

439

Leica ASP300 S Superior Specimen Quality, Every Time!  

E-print Network

Leica 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 user interface are hallmarks of the ASP300 S. Straightforward routine user operations and a variety

Adams, Mark

440

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

441

MESTRADO EM MICROBIOLOGIA BIOLOGIA ESTRUTURAL Instituto Superior Tcnico  

E-print Network

MESTRADO EM MICROBIOLOGIA BIOLOGIA ESTRUTURAL ­ Instituto Superior Técnico Objectivos: Introduzir e/ou aprofundar técnicas avançadas de Análise Estrutural relevantes em Biologia e sua aplicação na elucidação de

Instituto de Sistemas e Robotica

442

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

443

Sex Differences, Organizational Level, and Superiors' Evaluation of Managerial Leadership.  

ERIC Educational Resources Information Center

Explores superiors' evaluations of leadership skills of their managers to determine if sex differences exist. Rates middle and upper level male and female managers on "Benchmarks," a multirater feedback instrument. Detects no sex differences except that females rated higher in putting people at ease. (PA)

Knott, Katherine B.; Natalle, Elizabeth J.

1997-01-01

444

Jess Manuel Giz Novo Tcnico Superior de Mantenimiento  

E-print Network

Jesús Manuel Giz Novo Técnico Superior de Mantenimiento Servicio de Arquitectura y Urbanismo Mejora. INDICE: Jesús Manuel Giz Novo Servicio de Arquitectura y Urbanismo 2 #12;1. INTRODUCIÓN La Universidad de de Arquitectura y Urbanismo y la Oficina de Medioambiente dependientes del VIXA. Una situación de

Fraguela, Basilio B.

445

Benthic and Pelagic Contributions to Mysis Nutrition across Lake Superior  

EPA Science Inventory

Quantification of the sources of nutrition to Mysis diluviana is needed to better understand the basis for production in Mysis lakes and to improve models of migration-driven nutrient and contaminant transport. We collected Mysis, plankton, and benthos across Lake Superior using ...

446

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...

447

International WELCOME TO SCUOLA SUPERIORE SANT'ANNA  

E-print Network

. It is world famous for the Leaning Tower, which stands in the magnificent Piazza dei Miracoli. The river Arno'ANNA STUDYING AT THE SCUOLA SUPERIORE SANT'ANNA BEFORE LEAVING HOME AFTER ARRIVAL GUIDELINES FOR LIVING IN PISA complete independence both from the ScuolaNormaleandthe UniversityofPisa. Sant'Anna replaced Antonio

Gutkin, Boris

448

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...

449

Free Surface Oscillations and Tides of Lakes Michigan and Superior  

Microsoft Academic Search

From records of water levels at nineteen shoreline stations on Lakes Michigan, Huron and Superior (figure 1), we have prepared power spectra from 95 station-data sets and 128 spectra of interstation coherence and phase difference. Those spectra have been used to (1) identify the first five free gravitational, barotropic modes (surface seiches) of the three basins; (ii) estimate the corresponding

C. H. Mortimer; E. J. Fee

1976-01-01

450

Modelo para la Integración de Tecnologías en Educación Superior  

Microsoft Academic Search

Abstract En este trabajo se discute un modelo para la incorporaciónde tecnologías en educación superior. Este modelo surge a partir de un proyecto de investigaciónque está siendo desarrollado en conjunto por investigadores de la Universidad Nacional de La Pampa (Argentina) y de la Universidad de Illinois (USA). La colaboración interdisciplinaria de docentes e investigadorescon experiencia en las áreas de e-learning

Pedro A. Willging; Norma I. Scagnoli

451

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...

452

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...

453

HABITAT: LAKE SUPERIOR - STATE OF THE LAKE 2005  

EPA Science Inventory

This presentation briefly describes the state of research and management in Lake Superior concerning fisheries and their association to habitat. It discusses a general habitat classification for the lake and an increasing interest in the nearshore, summarizing the status of cont...

454

NOAA Technical Memorandum ERL GLERL-29 EVAPORATION FROM LARE SUPERIOR  

E-print Network

. INTRODUCTION WATER BUDGET METHOD 2.1 Overwater Precipitation 2.2 Runoff 2.3 Outflow 2.4 Change in Storage 2.5 Evaporation MASS TRANSFER METHOD 3.1 Mass Transfer Coefficient 3.2 Meteorological Data 3.3 Water Surface sensitivity and error variance analysis, 1942-75. 5. Coefficients for Lake Superior land to lake adjustment

455

Lake Superior Phytoplankton Characterization from the 2006 Probability Based Survey  

EPA Science Inventory

We conducted a late summer probability based survey of Lake Superior in 2006 which consisted of 52 sites stratified across 3 depth zones. As part of this effort, we collected composite phytoplankton samples from the epilimnion and the fluorescence maxima (Fmax) at 29 of the site...

456

The Quagga mussel invades the Lake Superior basin - journal article  

EPA Science Inventory

Prior studies recognized the presence of a single dreissenid species in Lake Superior--the zebra mussel Dreissena polymorpha. However, taxonomic keys based on traditional shell morphology are not always able to differentiate dreissenid species with confidence. We thus employed ge...

457

Biological Superiority in Math: Calvin or Susie? Spotlight: Gender Differences.  

ERIC Educational Resources Information Center

Discusses recent research findings, which do not appear to support the idea that boys' superiority in mathematics is biological. Cerebral lateralization studies are discussed; meta-analysis showed that the gender gap has narrowed, casting doubt on the importance of innate ability determining mathematics performance. Discusses implications of…

Luckenbill, Louise M.

1995-01-01

458

Behavior Analysis in Education. Focus on Measurably Superior Instruction.  

ERIC Educational Resources Information Center

This book was written to disseminate measurably superior instructional strategies to those interested in advancing sound, field-tested educational practices. Part 1 contains chapters that give two views of the future of behavior analysis in education, while part 2 focuses on promoting applied behavior analysis. Part 3 addresses issues in early…

Gardner, Ralph, III, Ed.; And Others

459

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...

460

Superior Lithium Electroactive Mesoporous Si@Carbon Core-Shell  

E-print Network

Superior Lithium Electroactive Mesoporous Si@Carbon Core-Shell Nanowires for Lithium Battery Anode@carbon core-shell nanowires with a diameter of 6.5 nm were prepared for a lithium battery anode material using silica templates.22 After an annealing process, the parent silica materials were selectively removed

Cho, Jaephil

461

Perfluoroalkyl acids in Lake Superior water: Trends and sources  

Microsoft Academic Search

Perfluoroalkyl acids (PFAs) are a family of highly persistent compounds which are present in the environment as a result of degradation of polyfluorinated precursors, from use as processing aids for production of fluoropolymers, and use in fire fighting foams. The purpose of this study was to investigate prevailing concentrations and possible sources of PFAs in Lake Superior, as well as

Brian F. Scott; Amila O. De Silva; Christine Spencer; Emma Lopez; Sean M. Backus; Derek C. G. Muir

2010-01-01

462

LAND USE ACTIVITIES AND WESTERN LAKE SUPERIOR WATER QUALITY  

EPA Science Inventory

Geographic Information Systems (GlS), computer systems which can analyze mapped information, can help reduce nonpoint source pollution in the Lake Superior basin by providing researchers and managers with a tool for predicting the consequences of land use change. n an EPA-funded ...

463

Superior electrochemical platforms based on polymer carbon nanotube composite electrodes  

Microsoft Academic Search

Putting insulating polymers into a highly conductive single-walled carbon nanotube paper leads to excellent electrochemical performance; fast redox reactions and high signal to background noise ratio. The ability of such composites to serve as superior electrochemical platforms was investigated by using DC and AC cyclic voltammetry. The electrochemical platforms show benefits in sensing applications with fast signal generation and low

Suriya Ounnunkad; Andrew I. Minett; Barry D. Fleming; Chong-Yong Lee; Alan M. Bond; Gordon G. Wallace

2010-01-01

464

Phlegmasia Caerulea Dolens in a Patient With an Inferior Vena Cava Filter: Treatment of Massive Iliocaval Thrombosis Using Local Intravenous Catheter-Directed Thrombolysis  

SciTech Connect

Phlegmasia caerulea dolens (PCD) is a potentially disastrous complication of inferior vena cava filter insertion, and its optimum management has not been clearly established. We present a case report of a patient with pulmonary embolism and acute adrenal haemorrhage who developed PCD secondary to massive iliocaval thrombosis after insertion of a Cook Celect removable filter. Local intravenous catheter-directed thrombolysis (CDT), followed by systemic anticoagulation, achieved limb salvage and virtual resolution of symptoms at 3 months without complications. CDT can be a successful primary treatment of filter-associated PCD and can be safe in selected patients with acute nontraumatic haemorrhage. Systemic anticoagulation may subsequently restore complete venous patency and may therefore be a useful approach to postthrombolysis management of residual iliocaval thrombus when filter removal is indicated.

Cookson, Daniel, E-mail: danielthomascookson@yahoo.co.uk [Middlemore Hospital, Department of Radiology (New Zealand); Caldwell, Stuart, E-mail: stuart.caldwell@middlemore.co.nz [Middlemore Hospital, Department of Vascular Surgery (New Zealand)

2012-10-15

465

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

466

An unreported cause of early postoperative dislocation following total hip revision: massive intra-capsular oedema related to inferior vena cava filter thrombosis.  

PubMed

Inferior vena cava (IVC) filters are widely used to prevent pulmonary embolism (PE) in patients with an absolute or relative contraindication for anticoagulants, during the peri-operative period of trauma or total joint replacement. No complication specific to the orthopaedic's aspect of this practice has been described. We report the case of a patient who had major femoral head/cup separation mimicking dislocation following revision total hip arthroplasty related to massive intra-capsular oedema produced by IVC filter thrombosis. The patient could be successfully treated non-operatively. Orthopaedic surgeons should identify and refer patients with a complicated IVC filter, to identify any migration or occlusion, and also be aware that removable filters must not be kept in situ, once the high-risk phase of developing PE is past. PMID:23491681

Langlois, J; Nich, C; Courpied, J-P; Hamadouche, M

2013-05-01

467

Thrombus just beneath a retrievable inferior vena cava filter in a pregnant woman with deep vein thrombosis: its removal requiring catheter thrombus fragmentation with fibrinolysis.  

PubMed

Recently, transient inferior vena cava (IVC) filters have been employed to protect against pulmonary embolism (PE) in pregnant women with deep vein thrombosis. A 34-year-old primiparous Japanese woman with a history of myomectomy was diagnosed with deep vein thrombosis by ultrasound at 27 weeks of gestation. Unfractionated heparin was administered, which soon ameliorated swelling in the right thigh. A transient IVC filter was implanted just before cesarean section. An enhanced computed tomography scan 2 days after cesarean section revealed a wide thrombus just distal to the filter. We performed catheter thrombus fragmentation with fibrinolysis just before the removal of the IVC filter, resulting in re-canalization of blood flow. No significant PE occurred. Although a transient IVC filter may work well for the prophylaxis of PE during labor and delivery, catheter fragmentation with fibrinolysis may become necessary at removal of the filter. PMID:24118502

Horie, Kenji; Suzuki, Hirotada; Ohkuchi, Akihide; Matsubara, Shigeki; Ikemoto, Tomokazu; Suzuki, Mitsuaki

2014-02-01

468

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

469

Ca2+-Dependent Contraction by the Saponoside Escin in Rat Vena Cava. Implications in Venotonic Treatment of Varicose Veins  

PubMed Central

Background Saponosides (horse chestnut seed extract, escin) and flavonoids (diosmin, Daflon 500) exhibit venotonic properties that have been utilized in treatment of varicose veins. However, the cellular mechanisms underlying the venotonic properties of escin and diosmin are unclear. Because Ca2+ is a major regulator of venous smooth muscle (VSM) function, we tested the hypothesis that escin and diosmin promote Ca2+-dependent venous contraction. Methods Rings of inferior vena cava (IVC) from male rats were suspended in a tissue bath for measurement of isometric contraction. Following control contraction to 96 mM KCl, the effects of escin and diosmin (10?10 to 10?4 M) on vein contraction were measured. To test the role of intracellular Ca2+ release, the vein response to escin and diosmin was measured in Ca2+-free (2mM EGTA) Krebs. To test for Ca2+-dependent effects, IVC segments were pretreated with escin or diosmin (10?4 M) in 0 Ca2+ Krebs, then extracellular CaCl2 (0.1, 0.3, 0.6, 1, 2.5 mM) was added and the [Ca2+]e-contraction relationship was constructed. To test for synergistic effects of diosmin, IVC segments were pretreated with diosmin (10?4 M) then stimulated with KCl (16 to 96 mM) or escin (10?10 to 10?4 M) and vein contraction was measured. Contraction data were presented as mg/mg tissue (means±SEM). Results In IVC segments incubated in normal Krebs (2.5 mM Ca2+), escin caused concentration-dependent contraction (max 104.3±19.6 at 10?4 M). Escin-induced contraction was not a rigor state, because after washing with Krebs the veins returned to a relaxed state. In Ca2+-free Krebs, there was essentially no contraction to escin. In escin-treated veins incubated in 0 Ca2+ Krebs, stepwise addition of extracellular CaCl2 caused corresponding increases in contraction (max 80.0±11.1 at 2.5 mM). In the absence of escin, the ?-adrenergic agonist phenylephrine (PHE, 10?5 M), angiotensin II (AngII, 10?6 M), and membrane depolarization by KCl (96 mM) caused significant contraction (122.5±45.1, 114.2±12.2 and 221.7±35.4, respectively). In IVC segments pretreated with escin (10?4 M), the contractile response to PHE (9.7±2.6), AngII (36.0±9.1) and KCl (82.3±10.2) was significantly reduced. Diosmin (10?4 M) caused small contraction in normal Krebs (11.7±1.9) and Ca2+-free Krebs (4.2±2.2). In diosmin-treated veins incubated in 0 Ca2+ Krebs, addition of extracellular CaCl2 caused minimal contraction. Diosmin did not enhance the IVC contraction to PHE, AngII, or escin, but enhanced the contractile response to KCl (24 to 51 mM). Conclusion In rat IVC, escin induces extracellular Ca2+-dependent contraction, but disrupts ?-adrenergic and AT1R receptor-mediated pathways, and depolarization-induced contraction. The initial venotonic benefits of escin may be offset by disruption of vein response to endogenous venoconstrictors, limiting its long-term therapeutic benefits in varicose veins. Diosmin does not cause venous contraction or potentiate the venotonic effects of endogenous venoconstrictors or escin ex vivo, and its use as venotonic may need to be further evaluated. PMID:21498026

Raffetto, Joseph D.; Khalil, Raouf A.

2011-01-01

470

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

471

Preference for concentric orientations in the mouse superior colliculus.  

PubMed

The superior colliculus is a layered structure important for body- and gaze-orienting responses. Its superficial layer is, next to the lateral geniculate nucleus, the second major target of retinal ganglion axons and is retinotopically organized. Here we show that in the mouse there is also a precise organization of orientation preference. In columns perpendicular to the tectal surface, neurons respond to the same visual location and prefer gratings of the same orientation. Calcium imaging and extracellular recording revealed that the preferred grating varies with retinotopic location, and is oriented parallel to the concentric circle around the centre of vision through the receptive field. This implies that not all orientations are equally represented across the visual field. This makes the superior colliculus different from visual cortex and unsuitable for translation-invariant object recognition and suggests that visual stimuli might have different behavioural consequences depending on their retinotopic location. PMID:25832803

Ahmadlou, Mehran; Heimel, J Alexander

2015-01-01

472

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

473

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

474

Preference for concentric orientations in the mouse superior colliculus  

PubMed Central

The superior colliculus is a layered structure important for body- and gaze-orienting responses. Its superficial layer is, next to the lateral geniculate nucleus, the second major target of retinal ganglion axons and is retinotopically organized. Here we show that in the mouse there is also a precise organization of orientation preference. In columns perpendicular to the tectal surface, neurons respond to the same visual location and prefer gratings of the same orientation. Calcium imaging and extracellular recording revealed that the preferred grating varies with retinotopic location, and is oriented parallel to the concentric circle around the centre of vision through the receptive field. This implies that not all orientations are equally represented across the visual field. This makes the superior colliculus different from visual cortex and unsuitable for translation-invariant object recognition and suggests that visual stimuli might have different behavioural consequences depending on their retinotopic location. PMID:25832803

Ahmadlou, Mehran; Heimel, J Alexander

2015-01-01

475

The distribution and abundance of planktonic diatoms in Lake Superior  

USGS Publications Warehouse

The principal diatoms collected at 14 stations in Lake Superior were Cyclotella "glomerata-stelligera" [= C. glomerata and C. stelligera combined], Cyclotella "ocellata-kutzingiana", Fragilaria crotonensis, and Rhizosolenia eriensis. Concentrations were heaviest in the Apostle Islands region (up to 2,160 per ml) and lightest northwest of the Keweenaw Peninsula (68 to 78 per ml). Species composition differed in different parts of the lake.

Holland, Ruth E.

1965-01-01