Sample records for cava superior caso

  1. Inferior Vena Cava Filter from Left-Sided Superior Vena Cava

    SciTech Connect

    Nair, Sujit, E-mail: drsnnair@hotmail.com; Ettles, Duncan; Robinson, Graham; Scott, Paul [Hull Royal Infirmary, Department of Radiology (United Kingdom)

    2008-07-15

    We describe the unusual case of a 71-year-old male with a history of deep vein thrombosis and recurrent multiple pulmonary embolism (PE) despite adequate anticoagulation. Computed tomography (CT) and brachiocephalic venography revealed a left-sided superior vena cava. We describe successful placement of an inferior vena cava filter via a left-sided superior vena cava.

  2. Ultrasound Detection of Superior Vena Cava Thrombus

    PubMed Central

    Birch, Aaron; Um, David; Laselle, Brooks

    2014-01-01

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

  3. V. -cava-superior-Syndrom mit beidseitiger Jugularis- und Subklaviavenenthrombose

    Microsoft Academic Search

    M. May; M. Seehafer; C. Helke; T. Überrück; S. Gunia; B. Hoschke

    2003-01-01

    Zusammenfassung Die Thrombose der V. cava superior (VCS) ist eine seltene Erkrankung und heutzutage zumeist mit einer diagnostischen oder therapeutischen Venenkatheterisierung assoziiert. Bei scheinbar spontan entstandenen Thrombosen sollte eine maligne Genese differentialdiagnostisch in Betracht gezogen werden. Es wird der Fall einer symptomatischen Jugularis-interna-, Subklavia- und Cava-superior-Thrombose dargestellt. Bei dem 54-jährigen Patienten wurde in der nachfolgenden Umfelddiagnostik ein asymptomatischer linksseitiger Nierentumor festgestellt

  4. Superior vena cava syndrome caused by embolisation of liquid Onyx

    Microsoft Academic Search

    Robbert Crusio; Kishan Ramachandran; Kavan Ramachandran; Yizhak Kupfer; Sidney Tessler

    2011-01-01

    Superior vena cava syndrome (SVCS) is usually caused by a malignancy or the presence of an intravascular device in a central vein. A 74-year-old male with a history of a superior vena cava (SVC) stent underwent embolisation of a brain arterio-venous malformation through the right meningeal artery with liquid Onyx. Two weeks later he presented with acute respiratory failure, upper

  5. Fatal Pericardial Tamponade After Superior Vena Cava Stenting

    SciTech Connect

    Ploegmakers, Marieke J. M., E-mail: mjm.ploegmakers@gmail.com; Rutten, Matthieu J. C. M. [Jeroen Bosch Hospital, Department of Radiology (Netherlands)

    2009-05-15

    We discuss a fatal complication of percutaneous superior vena cava (SVC) self-expandable stent placement in a patient with superior vena cava syndrome (SVCS). The SVCS was caused by a malignant mediastinal mass with total occlusion of the SVC. Twenty-four hours after the procedure, the patient died of a hemopericardial tamponade. In the literature, only seven cases have been described with this life-threatening complication. Patients with a necrotic tumor mass are more likely to develop this complication. Knowledge of this complication may increase patient survival.

  6. Superior vena cava filters: hindsight, insight and foresight.

    PubMed

    Mir, M A

    2008-12-01

    Upper Extremity Deep Venous Thromboses (UEDVT) are encountered with increasing frequency as the use of central lines and catheters increases. Previously disregarded as benign they are now established to contribute to Pulmonary Embolism (PE) and death. Superior vena cava filters (SVC filters) have been shown to be safe and efficacious for prevention of UEDVT in case anti-coagulation is contraindicated. Compared to Inferior Vena Cava Filters (IVC Filters), data are scarce however and long-term, randomized studies are lacking. SVC filter insertion presents unique indications, contraindications, complications and technical challenges different from their IVC counterparts. PMID:18161006

  7. [Superior vena cava syndrome induced by pacemaker probes, 12 years after introduction].

    PubMed

    Espitia, O; Guerin, P; Néel, A; Espitia-Thibault, A; Pottier, P; Planchon, B; Pistorius, M-A

    2013-05-01

    Superior vena cava syndrome is a rare disease, most often found to result from a malignant process, which causes extrinsic compression of the superior vena cava. In recent years, there has been an increase of superior vena cava syndrome related to medical devices (implantable site, pacemaker [PM], central venous line for parenteral nutrition...). We report the case of a 37-year-old patient who developed a superior vena cava syndrome 12 years after implantation of a PM. The diagnosis was established on venography after two negative venous-CT focused on the superior vena cava. The superior vena cava syndrome improved immediately after angioplasty and stenting covering the PM probes at the superior vena cava/brachiocephalic venous trunk junction. PMID:23433510

  8. Superior vena cava syndrome caused by embolisation of liquid Onyx.

    PubMed

    Crusio, Robbert; Ramachandran, Kishan; Ramachandran, Kavan; Kupfer, Yizhak; Tessler, Sidney

    2011-01-01

    Superior vena cava syndrome (SVCS) is usually caused by a malignancy or the presence of an intravascular device in a central vein. A 74-year-old male with a history of a superior vena cava (SVC) stent underwent embolisation of a brain arterio-venous malformation through the right meningeal artery with liquid Onyx. Two weeks later he presented with acute respiratory failure, upper airway obstruction, plethora, varices of the chest wall and stridor. He was intubated and placed on mechanical ventilatory support. Chest imaging revealed a linear structure in the SVC, extending to the right atrium. Interventional radiology removed the material, which was determined to be liquid Onyx. Venous pressures of the right internal jugular vein decreased after removal of the material. The symptoms resolved and patient was successfully extubated. This is the first reported case of SVCS caused by liquid Onyx. PMID:22707372

  9. Superior vena cava syndrome caused by embolisation of liquid Onyx

    PubMed Central

    Crusio, Robbert; Ramachandran, Kishan; Ramachandran, Kavan; Kupfer, Yizhak; Tessler, Sidney

    2011-01-01

    Superior vena cava syndrome (SVCS) is usually caused by a malignancy or the presence of an intravascular device in a central vein. A 74-year-old male with a history of a superior vena cava (SVC) stent underwent embolisation of a brain arterio-venous malformation through the right meningeal artery with liquid Onyx. Two weeks later he presented with acute respiratory failure, upper airway obstruction, plethora, varices of the chest wall and stridor. He was intubated and placed on mechanical ventilatory support. Chest imaging revealed a linear structure in the SVC, extending to the right atrium. Interventional radiology removed the material, which was determined to be liquid Onyx. Venous pressures of the right internal jugular vein decreased after removal of the material. The symptoms resolved and patient was successfully extubated. This is the first reported case of SVCS caused by liquid Onyx. PMID:22707372

  10. Anesthetic management of superior vena cava syndrome due to anterior mediastinal mass

    PubMed Central

    Chaudhary, Kapil; Gupta, Anshu; Wadhawan, Sonia; Jain, Divya; Bhadoria, Poonam

    2012-01-01

    Anesthetic management of superior vena cava syndrome carries a possible risk of life-threatening complications such as cardiovascular collapse and complete airway obstruction during anesthesia. Superior vena cava syndrome results from the enlargement of a mediastinal mass and consequent compression of mediastinal structures resulting in impaired blood flow from superior vena cava to the right atrium and venous congestion of face and upper extremity. We report the successful anesthetic management of a 42-year-old man with superior vena cava syndrome posted for cervical lymph node biopsy. PMID:22557753

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

    PubMed Central

    Lopez, J. Alberto

    2008-01-01

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

  12. Transvenous biventricular pacing for cardiac resynchronization therapy in patients with persistent left superior vena cava and right superior vena cava atresia.

    PubMed

    Lopez, J Alberto

    2008-01-01

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

  13. [Implantation of a biventricular pacing system via a persistent left-sided superior vena cava].

    PubMed

    Gorr, E; Grove, R; Weitkamp, P; Kranig, W; Thale, J

    2004-10-01

    Cardiac resynchronization therapy by multisite biventricular pacing presents an additive therapeutic option in the treatment of severe heart failure. Biventricular pacemaker implantation is challenging in patients with persistent left superior vena cava. We describe in this case report the implantation of a biventricular pacemaker using a left-sided approach in a patient with persistent left superior vena cava. PMID:15492897

  14. Permanent Pacing from a Left Ventricular Vein in a Patient with Persistent Left Superior Vena Cava and Absent Right Superior Vena Cava: Use of an Over-the-Wire System

    Microsoft Academic Search

    Deepak Gaba; Prem Kittusamy; Reginald T. Ho; Behzad Pavri; Arnold J. Greenspon

    2003-01-01

    In patients with a persistent left superior vena cava, placement of a permanent transvenous pacing lead for ventricular pacing via the left subclavian vein can be technically challenging. Permanent pacing was achieved in a patient with a persistent left superior vena cava and absent right superior vena cava using a left ventricular vein. Use of an over-the-wire lead system greatly

  15. Cardiac resynchronization therapy in patients with absent right but persistent left superior vena cava.

    PubMed

    Kortner, A; Keyser, A; Schmid, C

    2009-06-01

    Abnormalities of the vena cava system are usually asymptomatic and are found incidentally during pacemaker implantation or catherization. We report a case of dilative cardiomyopathy requiring cardiac resynchronization defibrillator therapy (CRT-D). During the operation, a persistent left superior vena cava with an absent right vena cava was discovered. During open chest surgery, we implanted a CRT-D with epicardial patches and pacing leads, which is a simple technique for safe and reliable biventricular defibrillator therapy in these patients. PMID:19670119

  16. Biventricular pacing and persistent left superior vena cava. Case report and review of the literature.

    PubMed

    Meijboom, Willem B; Vanderheyden, Marc

    2002-08-01

    Persistent left superior vena cava is usually asymptomatic and does not cause any physiological problems (1). However it can severely complicate pacemaker implantation and render it sometimes impossible (2). In this case report we describe the implantation of a biventricular pacemaker using a left-sided approach in a patient with persistent left superior vena cava syndrome. A biventricular resynchronization device was used because of the reported beneficial haemodynamic effects of this pacing mode in patients with severe heart failure (3). PMID:12222698

  17. Persistent left superior vena cava: a case report and review of literature

    Microsoft Academic Search

    Sandeep K Goyal; Sujeeth R Punnam; Gita Verma; Frederick L Ruberg

    2008-01-01

    Persistent left superior vena cava is rare but important congenital vascular anomaly. It results when the left superior cardinal vein caudal to the innominate vein fails to regress. It is most commonly observed in isolation but can be associated with other cardiovascular abnormalities including atrial septal defect, bicuspid aortic valve, coarctation of aorta, coronary sinus ostial atresia, and cor triatriatum.

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

    PubMed

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

    2013-01-01

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

  19. Superior Vena Cava Tumoral Thrombosis Revealing a Burkitt's Lymphoma and a Lymphoblastic Non-Hodgkin's LymphomaA Case Report

    Microsoft Academic Search

    A. G. Juimo; A. M. Dzogang Temdemno; J. B. Tapko; J. Yomi; A. Teyang; G. Tagny; P. F. Tchokoteu; A. Lysinge; J. J. Pagbe; A. Mbakop

    1997-01-01

    Superior vena cava thrombosis (SVCT) is a rare pathology, though of great significance since it implies the development of a malignant process. The most common etiologies are basically bronchopulmonary and mediastinal tumors. Observations involving 2 patients presenting with superior vena cava syndrome (SVCS) are reported in this study, in which radiologic investigations (chest roentgenogram, computed tomography scan of the thorax,

  20. A novel technique for right ventricular lead placement in a patient with a persistent left superior vena cava

    Microsoft Academic Search

    Marcos Daccarett; Rakesh K. Pai; Moeen Abedin; Nathan M. Segerson; Mohamed H. Hamdan

    Persistent left superior vena cava is the most common venous anomaly of the thorax. If unrecognized, it could lead to catheter malplacement and even vascular injuries. We describe a novel use of a Worley sheath for the delivery of a right ventricular (RV) endocardial pacing lead in a 65-year-old male with a persistent left superior vena cava. After failed attempts

  1. Case Report Implantation of a Resynchronization Implantable Cardioverter Defibrillator in a Patient with Persistent Left Superior Vena Cava

    Microsoft Academic Search

    Dante Antonelli; Nahum Adam Freedberg; Alexander Feldman

    Implantation of resynchronization implantable cardioverter defibrillator was performed in a patient with persistent left superior vena cava. A dual coil defibrillation lead was inserted in the right ventricle apex via a small innominate vein. Left ventricular and atrial leads were implanted through persistent left superior vena cava. Left ventricular lead was easily implanted into the postero lateral vein. Pacing thresholds

  2. Superior vena cava syndrome of malignant origin. Which surgical procedure for which diagnosis?

    Microsoft Academic Search

    Henri Porte; David Metois; Laetitia Finzi; Gilles Lebuffe; Anne Guidat; Massimo Conti; Alain Wurtz

    2000-01-01

    Objective: Since some malignancies causing superior vena cava syndrome (SVCS) are only sensitive to a specific treatment regimen, it is crucial to diagnose the underlying pathology in such cases. The aim of the present study was to review the surgical procedures used to establish the aetiology of SVCS of a malignant origin. Methods: This retrospective study was based on a

  3. Delayed Spontaneous Superior Vena Cava Perforation Associated with a SVC Wallstent

    SciTech Connect

    Smith, Simon L. [Department of Radiology, Ipswich Hospital NHS Trust, Heath Road, Ipswich, Suffolk, IP4 5PD (United Kingdom); Manhire, Adrian R. [Department of Radiology, Nottingham City Hospital, Hucknall Road, Nottingham NG5 1PB (United Kingdom); Clark, David M. [Department of Pathology, Lincoln and Louth Hospital NHS Trust, Greetwell Road, Lincoln LN2 5QY (United Kingdom)

    2001-07-15

    A patient was referred for superior vena cava (SVC) stenting prior to surgical biopsy of a mediastinal mass. A technically satisfactory insertion was followed 6 months later by cardiac tamponade with two legs of the Wallstent having perforated the wall of the SVC.

  4. Cardiac Metastasis from Invasive Thymoma Via the Superior Vena Cava: Cardiac MRI Findings

    SciTech Connect

    Dursun, Memduh, E-mail: memduhdursun@yahoo.com; Sarvar, Sadik; Cekrezi, Bledi [Istanbul University, Istanbul Faculty of Medicine, Department of Radiology (Turkey); Kaba, Erkan [Istanbul University, Istanbul Faculty of Medicine, Department of Thoracic Surgery (Turkey); Bakir, Baris [Istanbul University, Istanbul Faculty of Medicine, Department of Radiology (Turkey); Toker, Alper [Istanbul University, Istanbul Faculty of Medicine, Department of Thoracic Surgery (Turkey)

    2008-07-15

    Cardiac tumors are rare, and metastatic deposits are more common than primary cardiac tumors. We present cardiac magnetic resonance imaging (MRI) findings of a 50-year-old woman with invasive thymoma. Cardiac MRI revealed a heterogeneous, lobulated anterior mediastinal mass invading the superior vena cava and extending to the right atrium. In cine images there was no invasion to the right atrial wall.

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

    Microsoft Academic Search

    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

    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

  6. Placement of a temporary pacemaker electrode through a persistent left superior vena cava

    Microsoft Academic Search

    T. A. Cron; P. T. Buser; S. Osswald

    1998-01-01

    Perioperative temporary pacing was needed in a patient with congenital skeletal malformations and a cardiac conduction disturbance\\u000a with incomplete trifascicular block. We report the successful placement of the pacemaker electrode through a persistent left\\u000a superior vena cava (SVC).

  7. VDD pacing from the middle cardiac vein via a persistent left superior vena cava

    Microsoft Academic Search

    John A. Chiladakis; Dimitris Siablis; Antonis S. Manolis

    2001-01-01

    We report a combination of unusual features demonstrating a permanent pacemaker implantation of a single-pass VDD lead by way of an anomalous persistent left superior vena cava in the middle cardiac vein. The ventricular stimulation resembled a right bundle branch block QRS morphology and was successfully synchronized by spontaneous atrial activity. This case illustrates an alternative approach of effective VDD

  8. Permanent right ventricular pacing through an anomalous left superior vena cava

    Microsoft Academic Search

    S Amikam; J Lemer; E Riss

    1977-01-01

    A persistent left superior vena cava can complicate the implantation of a transvenous pacemaker. In a patient who required a permanent pacemaker, this venous anomaly was discovered during the insertion of the electrode but it did not prevent long-term right ventricular pacing. This was achieved after the electrode had been manipulated through the coronary sinus and right atrium. A plan

  9. Pacemaker electrode implantation in patients with persistent left superior vena cava

    Microsoft Academic Search

    F Zerbe; J Bornakowski; W Sarnowski

    1992-01-01

    Four out of 661 consecutive patients with permanent endocardial VVI pacing had the pacing lead introduced through a persistent left superior vena cava. It was difficult to introduce the lead from the right atrium into the right ventricle because the tip of the lead tended to be deflected away from the tricuspid orifice. This difficulty was overcome by shaping the

  10. Successful Implantation of a Permanent Pacemaker through a Persistent Left Superior Vena cava

    Microsoft Academic Search

    Ali H. Al-Sayegh; Fawziah Al-Kandari

    2002-01-01

    We present a case of successful implantation of a permanent pacemaker through an unusual course of a persistent left superior vena cava (PLSVC). A young male patient presented with symptomatic bradycardia and a heart rate of 35 beats per minute. The pacing lead was introduced through the standard left subclavian vein approach and was found to pass through an unusual

  11. Comparison of superior vena cava and femoroiliac vein pressure according to intra-abdominal pressure

    PubMed Central

    2012-01-01

    Background Previous studies have shown a good agreement between central venous pressure (CVP) measurements from catheters placed in superior vena cava and catheters placed in the abdominal cava/common iliac vein. However, the influence of intra-abdominal pressure on such measurements remains unknown. Methods We conducted a prospective, observational study in a tertiary teaching hospital. We enrolled patients who had indwelling catheters in both superior vena cava (double lumen catheter) and femoroiliac veins (dialysis catheter) and into the bladder. Pressures were measured from all the sites, CVP, femoroiliac venous pressure (FIVP), and intra-abdominal pressure. Results A total of 30 patients were enrolled (age 62?±?14?years; SAPS II 62 (52–76)). Fifty complete sets of measurements were performed. All of the studied patients were mechanically ventilated (PEP 3 cmH20 (2–5)). We observed that the concordance between CVP and FIVP decreased when intra-abdominal pressure increased. We identified 14?mmHg as the best intra-abdominal pressure cutoff, and we found that CVP and FIVP were significantly more in agreement below this threshold than above (94% versus 50%, P?=?0.002). Conclusions We reported that intra-abdominal pressure affected agreement between CVP measurements from catheter placed in superior vena cava and catheters placed in the femoroiliac vein. Agreement was excellent when intra-abdominal pressure was below 14?mmHg. PMID:22742667

  12. [Vena cava superior syndrome: surgical treatment of the thrombosis of the superior vena cava after implantation of a hemodialysis catheter--a case report and review of the literature].

    PubMed

    Lénárd, László; Szabados, Sándor; Imre, Jeno; Pintér, Ors; Fazekas, Attila; Tornai, Zoltán; Déczy, Katalin; Várady, Edit; Papp, Lajos

    2008-01-01

    One of the rare reasons of the non malignant superior vena cava syndrome is the thrombosis of superior vena cava. Obstruction or occlusion of central veins is one of the many complications of the more and more frequently used central venous catheters and pacemaker electrodes. The authors report a case of superior vena cava thrombosis resulting in dialysis catheter insufficiency in case of a young, uraemic, female patient wit Tesio catheter and the surgical treatment of it with the use of cardiopulmonary bypass during the operation. Apropos of this case, the authors outline the causes of malignant, non-malignant and iatrogenic superior vena cava syndrome, furthermore the conservative, surgical and catheter therapy of the syndrome. PMID:18089480

  13. Right-sided superior vena cava draining into the left atrium in a patient with persistent left-sided superior vena cava emptying into the right atrium diagnosed by echocardiography

    PubMed Central

    Clark, Courtney

    2015-01-01

    We present a patient with an isolated right-sided superior vena cava draining into the left atrium with a persistent left-sided superior vena cava emptying into the right atrium. During an agitated saline injection into the patient's right upper extremity intravenous line, the patient suffered an acute transient ischemic attack. To our knowledge, this is the only reported case of this rare anomaly incidentally uncovered during an echocardiogram with saline contrast study. PMID:26130891

  14. A conventional multimodality imaging cascade to detect a superior vena cava obstruction.

    PubMed

    Grimaldi, Antonio; Cammalleri, Valeria; Maisano, Francesco; Ferrarello, Santo; Colombo, Antonio; Alfieri, Ottavio; La Canna, Giovanni

    2011-03-01

    Iatrogenic injuries of the superior vena cava (SVC) following surgical or endovascular treatments are rare but challenging complications and require prompt diagnosis and appropriate treatment. The additional diagnostic value of venography, contrast-enhanced computed tomography, and magnetic resonance imaging has been widely assessed in the clinical setting of the SVC obstruction, whereas the role of conventional transoesophageal echocardiography (TEE) is still uncertain. A 43-year-old female patient was admitted to the echocardiography laboratory because of a superior vena cava syndrome (SVCS) following a balloon SVC venoplasty with stent implantation. A standard transoesophageal echocardiography examination clearly detected the SVC obstruction on previously implanted stents. We found that fundamental steps of early diagnosis of SVCS would benefit from standard TEE. PMID:21186200

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

    SciTech Connect

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

    2012-06-15

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

  16. Transvenous defibrillator implantation in a patient with persistent left superior vena cava.

    PubMed

    Vijayvergiya, Rajesh; Shrivastava, Smit; Kumar, Alok; Otaal, Parminder S

    2013-04-26

    Persistent left superior vena cava (LSVC) can be incidentally detected during pacemaker implantation through left pectoral side. There is technical difficulty of optimal site pacing and lead stability for right ventricle lead in such situation. We hereby report a case of successful single-chamber implantable cardioverter defibrillator (ICD) implantation in a 50 years-old male with LSVC. The practical issues related with right ventricle lead implantation and pacing/defibrillation parameters for ICD device are discussed. PMID:23675558

  17. ETIOLOGY AND OUTCOME OF SUPERIOR VENA CAVA (SVC) OBSTRUCTION IN ADULTS

    Microsoft Academic Search

    Wipa Reechaipichitkul; Suchart Thongpaen

    Between 1997 and 2002, 107 patients with symptoms of superior vena cava (SVC) ob- struction presented at a university hospital in Northeast Thailand. Age averaged 50.7 years (range, 1 to 84). The male to female ratio was 5.7:1. Duration of symptoms before diagnosis was 29.4 days (range, 2 to 240), including facial swelling, cough, and chest discomfort. About 20% of

  18. Left-sided biventricular pacemaker implantation in the presence of persistent left superior vena cava.

    PubMed

    Sankhla, Vineet; Vajifdar, Bhavesh; Shah, Mandar; Lokhandwala, Yash

    2010-01-01

    Persistent Left Superior Vena Cava (PLSVC) is the most common thoracic venous anomaly encountered during device implantation. The most common problems related to the unusual anatomic access to the heart are reaching a convenient pacing site and ensuring stable lead placement. This report describes left sided implantation of RA, RV and LV leads in a patient with a PLSVC who was referred for cardiac resynchronizaiton therapy. The literature regarding the interventional approach for device implantation in patients with PLSVC is reviewed. PMID:21280477

  19. Transvenous defibrillator implantation in a patient with persistent left superior vena cava

    PubMed Central

    Vijayvergiya, Rajesh; Shrivastava, Smit; Kumar, Alok; Otaal, Parminder S

    2013-01-01

    Persistent left superior vena cava (LSVC) can be incidentally detected during pacemaker implantation through left pectoral side. There is technical difficulty of optimal site pacing and lead stability for right ventricle lead in such situation. We hereby report a case of successful single-chamber implantable cardioverter defibrillator (ICD) implantation in a 50 years-old male with LSVC. The practical issues related with right ventricle lead implantation and pacing/defibrillation parameters for ICD device are discussed. PMID:23675558

  20. 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

    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

    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.

  1. Hybrid right-left cardiac resynchronization therapy defibrillator implantation in persistent left superior vena cava.

    PubMed

    Anselmino, Matteo; Marocco, Maria Cristina; Amellone, Claudia; Massa, Riccardo

    2009-04-01

    Persistence of the left superior vena cava (PLSVC), observed in 0.3% of the general population as established by autopsy, is an anatomic variation particularly relevant when occurring in patients in need of a transvenous pacing. In this report, we describe a hybrid right-left cardiac resynchronization therapy defibrillator implantation approach in a patient with PLSVC. In our experience, the described approach proved feasible and safe, and may be considered an option in case of complex vein anatomy before referring for cardiac surgical implantation of a left ventricular lead. PMID:19112072

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

    SciTech Connect

    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

    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.

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

    SciTech Connect

    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

    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.

  4. Persistent left superior vena cava: a case report and review of literature

    PubMed Central

    Goyal, Sandeep K; Punnam, Sujeeth R; Verma, Gita; Ruberg, Frederick L

    2008-01-01

    Persistent left superior vena cava is rare but important congenital vascular anomaly. It results when the left superior cardinal vein caudal to the innominate vein fails to regress. It is most commonly observed in isolation but can be associated with other cardiovascular abnormalities including atrial septal defect, bicuspid aortic valve, coarctation of aorta, coronary sinus ostial atresia, and cor triatriatum. The presence of PLSVC can render access to the right side of heart challenging via the left subclavian approach, which is a common site of access utilized when placing pacemakers and Swan-Ganz catheters. Incidental notation of a dilated coronary sinus on echocardiography should raise the suspicion of PLSVC. The diagnosis should be confirmed by saline contrast echocardiography. PMID:18847480

  5. Placement of a Retrievable Guenther Tulip Filter in the Superior Vena Cava for Upper Extremity Deep Venous Thrombosis

    SciTech Connect

    Nadkarni, Sanjay; Macdonald, Sumaira; Cleveland, Trevor J.; Gaines, Peter A. [Sheffield Vascular Institute, Firth 4, Northern General Hospital, Herries Road, Sheffield S5 7AU (United Kingdom)

    2002-12-15

    A retrievable Guenther Tulip caval filter(William Cook, Europe) was successfully placed and retrieved in the superior vena cava for upper extremity deep venous thrombosis in a 56-year-old woman. Bilateral subclavian and internal jugular venous thromboses thought secondary to placement of multiple central venous catheters were present. There have been reports of the use of permanent Greenfield filters and a single case report of a temporary filter in the superior vena cava. As far as we are aware this is the first reported placement and successful retrieval of a filter in these circumstances.

  6. Coronary Sinus Ostial Atresia and Persistent Left-Sided Superior Vena Cava: Clinical Significance and Strategies for Cardiac Resynchronization Therapy

    PubMed Central

    Lim, Paul Chun Yih; Baskaran, Lohendran; Ho, Kah Leng; Teo, Wee Siong; Ching, Chi Keong

    2013-01-01

    A 48-year-old male patient underwent cardiac resynchronization therapy defibrillator implantation, and he was found to have atresia of the coronary sinus ostium with venous drainage occurring via a persistent left-sided superior vena cava, which was connected to the right-sided superior vena cava by the innominate vein. This is a rare benign cardiac anomaly that can pose problems when the coronary sinus needs to be cannulated. To identify the course of the coronary sinus, a coronary angiogram can be performed with attention directed to the venous phase of the angiogram. Although the technical difficulty of coronary sinus cannulation increases, various catheters, wires, and delivery systems can be utilized and this anomaly does not usually prevent successful left ventricular lead placement in cardiac resynchronization therapy via a left-sided superior vena cava approach. There however needs to be consideration regarding caliber of the left-sided superior vena cava being sufficiently large to avoid compromise of venous drainage after lead insertion. PMID:24436612

  7. Left ventricular lead implantation assisted by magnetic navigation in a patient with a persistent left superior vena cava

    Microsoft Academic Search

    Máximo Rivero-Ayerza; Yves van Belle; Joris Mekel; Luc J. Jordaens

    2007-01-01

    In a woman with a persistent left superior vena cava and a dilated coronary sinus, a right-sided biventricular ICD implantation was performed assisted by remote magnetic navigation. Intra-cardiac echocardiography was helpful in locating the coronary sinus os.

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

    PubMed Central

    Warren, Patrick; Burke, Charles

    2011-01-01

    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

  9. Giant saphenous vein graft pseudoaneurysm to right posterior descending artery presenting with superior vena cava syndrome

    PubMed Central

    Vargas-Estrada, Andres; Edwards, Dianna; Bashir, Mohammad; Rossen, James; Zahr, Firas

    2015-01-01

    Saphenous vein grafts (SVG) pseudoaneurysms, especially giant ones, are rare and occur as a late complication of coronary artery bypass grafting. This condition affects both genders and typically occurs within the sixth decade of life. The clinical presentation ranges from an asymptomatic incidental finding on imaging studies to new onset angina, dyspnea, myocardial infarction or symptoms related to compression of neighboring structures. An 82-year-old woman presented with acute onset back pain, dyspnea and was noted to have significantly engorged neck veins. In the emergency department, a chest computed tomographic angiogram with intravenous contrast revealed a ruptured giant bilobed SVG pseudoaneurysm to the right posterior descending artery (RPDA). This imaging modality also demonstrated compression of the superior vena cava (SVC) by the SVG pseudoaneurysm. Coronary angiogram with bypass study was performed to establish the patency of this graft. Endovascular coiling and embolization of the SVG to RPDA was initially considered but disfavored after the coronary angiogram revealed preserved flow from the graft to this arterial branch. After reviewing the angiogram films, a surgical strategy was favored over a percutaneous intervention with a Nitinol self-expanding stent since the latter would have not addressed the superior vena cava compression caused by the giant pseudoaneurysm. Intraoperative transesophageal echocardiogram demonstrated SVC compression by the giant pseudoaneurysm cranial lobe. Our patient underwent surgical ligation and excision of the giant pseudoaneurysm and the RPDA was regrafted successfully. In summary, saphenous vein grafts pseudoaneurysms can be life-threatening and its therapy should be guided based on the presence of mechanical complications, the patency of the affected vein graft and the involved myocardial territory viability. PMID:26131340

  10. Giant saphenous vein graft pseudoaneurysm to right posterior descending artery presenting with superior vena cava syndrome.

    PubMed

    Vargas-Estrada, Andres; Edwards, Dianna; Bashir, Mohammad; Rossen, James; Zahr, Firas

    2015-06-26

    Saphenous vein grafts (SVG) pseudoaneurysms, especially giant ones, are rare and occur as a late complication of coronary artery bypass grafting. This condition affects both genders and typically occurs within the sixth decade of life. The clinical presentation ranges from an asymptomatic incidental finding on imaging studies to new onset angina, dyspnea, myocardial infarction or symptoms related to compression of neighboring structures. An 82-year-old woman presented with acute onset back pain, dyspnea and was noted to have significantly engorged neck veins. In the emergency department, a chest computed tomographic angiogram with intravenous contrast revealed a ruptured giant bilobed SVG pseudoaneurysm to the right posterior descending artery (RPDA). This imaging modality also demonstrated compression of the superior vena cava (SVC) by the SVG pseudoaneurysm. Coronary angiogram with bypass study was performed to establish the patency of this graft. Endovascular coiling and embolization of the SVG to RPDA was initially considered but disfavored after the coronary angiogram revealed preserved flow from the graft to this arterial branch. After reviewing the angiogram films, a surgical strategy was favored over a percutaneous intervention with a Nitinol self-expanding stent since the latter would have not addressed the superior vena cava compression caused by the giant pseudoaneurysm. Intraoperative transesophageal echocardiogram demonstrated SVC compression by the giant pseudoaneurysm cranial lobe. Our patient underwent surgical ligation and excision of the giant pseudoaneurysm and the RPDA was regrafted successfully. In summary, saphenous vein grafts pseudoaneurysms can be life-threatening and its therapy should be guided based on the presence of mechanical complications, the patency of the affected vein graft and the involved myocardial territory viability. PMID:26131340

  11. 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)

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

    1971-01-01

    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.

  12. Tetralogy of fallot with left superior vena cava and coronary sinus atrial septal defect: a rare association.

    PubMed

    Mallula, Kiran K; Patel, Neil D; Abdulla, Ra-Id; Bokowski, John W

    2015-06-01

    This report describes a rare case of Tetralogy of Fallot with associated left superior vena cava and coronary sinus atrial septal defect. The initial diagnosis was made by echocardiography. The patient underwent complete repair at 2 months of age. Her postoperative course was complicated by low cardiac output requiring ECMO. She was subsequently weaned off of ECMO and discharged home. She continues to do well on serial follow-up. PMID:25762469

  13. Surgical lead extraction for total occlusion of the superior vena cava by chronic lead infection after mustard procedure.

    PubMed

    Steinberg, Christian; Calvaruso, Davide; Guimond, Jean; Bédard, Elisabeth; Perron, Jean

    2014-05-01

    We present a case of total occlusion of the superior vena cava (SVC) with extensive thrombosis of the adjacent large veins secondary to multiple abandoned pacemaker leads with a superimposed chronic lead infection by Corynebacterium jeikeium. A surgical lead extraction was performed with an extensive en-bloc resection of the SVC together with the right subclavian vein and the right innomate vein. No venous reconstruction was required because of an unobstructed runoff via a well-developed azygos system. PMID:24438576

  14. Minimally invasive video-assisted thoracoscopic left ventricular epicardial lead implantation for biventricular pacing in a patient with persistent left superior vena cava.

    PubMed

    Matsuno, Yukihiro; Mori, Yoshio; Umeda, Yukio; Imaizumi, Matsuhisa; Takiya, Hiroshi

    2008-07-01

    Cardiac resynchronization therapy (CRT) by biventricular pacing reduces symptoms and improves left ventricular function in many patients with heart failure due to left ventricular systolic dysfunction and cardiac dyssynchrony. Implantation of the biventricular pacing lead in association with persistent left superior vena cava is technically challenging. We report a successful case of minimally invasive video-assisted thoracoscopic left ventricular epicardial lead implantation for biventricular pacing in a patient with persistent left superior vena cava. PMID:18649062

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

    PubMed Central

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

    2014-01-01

    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

  16. Persistent left superior vena cava draining to the left atrium: A case report and review of the literature

    PubMed Central

    Duymus, Mahmut; Yesilkaya, Yakup; Orman, Gunes; Bozkurt, Alper; Yilmaz, Omer

    2012-01-01

    Summary Background: Persistent left superior vena cava is a rare but important congenital vascular anomaly. However, PLSVC with absent RSVC (isolated PLSVC) is a very rare venous malformation We report on a rare case of persistent left superior vena cava (PLSVC) with absent right superior vena cava (RSVC). Case Report: This venous malformation was identified incidentally in a 69-year-old woman during chest multi-detector computed tomography (MDCT). On chest MDCT, the SVC was noted on the left side. A bridging vein drained the right jugular and right subclavian veins and joined the left brachiocephalic vein in order to form the PLSVC, which descended on the left side of the mediastinum and drained into the left atrium (LA). The patient had no additional cardiac anomaly. Conclusions: Isolated PLSVC is usually asymptomatic but it can pose difficulties for establishing central venous access, pacemaker implantation and cardiothoracic surgery. This condition is also associated with an increased incidence of congenital heart disease, arrhythmias and conduction disturbances. A wide spectrum of clinicians should be aware of this anomaly, its variations and possible complications. PMID:23269940

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

    PubMed

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

    2014-10-01

    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

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

    PubMed Central

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

    2014-01-01

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

  19. Downhill oesophageal varices resulting from superior vena cava graft occlusion after resection of a thymoma†

    PubMed Central

    Inoue, Yoshimasa; Sakai, Shoji; Aoki, Teruhiro

    2013-01-01

    Downhill oesophageal varices (DEV) may occur as a rare complication of superior vena cava (SVC) obstruction. DEV are usually associated with SVC obstruction caused by systemic vasculitis or mediastinal tumours. In this report, we describe a very rare case of DEV resulting from SVC graft occlusion after resection of a thymoma. A 66-year old man with an invasive thymoma was treated by radical resection and bypass grafting from the right brachiocephalic vein to the right atrium. Occlusion of the SVC graft was diagnosed postoperatively; however, the patient could be managed conservatively. Although there had been no significant findings in the oesophagus in previous endoscopic examinations, grade F2 varices were found in the proximal oesophagus in the 19th postoperative month, and DEV caused by SVC graft occlusion was diagnosed. Until now, 2 years since the diagnosis, no apparent symptoms or deterioration of the DEV have been observed. The possible development of DEV should be borne in mind during the follow-up of patients with postoperative SVC graft occlusion. PMID:23686892

  20. Biventricular pacing via a persistent left superior vena cava: report of four cases.

    PubMed

    Gasparini, Maurizio; Mantica, Massimo; Galimberti, Paola; Coltorti, Fernando; Simonini, Stefano; Ceriotti, Carlo; Gronda, Edoardo

    2003-01-01

    Persistence of left superior vena cava (LSVC) is an uncommon finding during pacemaker implantation, which may be particularly relevant in performing LV transvenous pacing. Rarely, it is further complicated by the presence of atresia of the coronary sinus ostium (CSO). This article reports the authors experience with biventricular pacing (Biv-P) in this unusual clinical setting. From October 1999 to April 2002, 158 patients underwent biventricular pacing. In four of them (mean age 62.2 years), the presence of a persistent LSVC draining into the coronary sinus (CS) was detected at implantation, associated with atresia of the CSO in two patients. A common characteristic was the angiographic finding of a large CS with few tributaries. The LV leads were successfully positioned in the middle cardiac vein in three patients and in a posterolateral vein in one patient. All vessels were large and their cannulation via downstream CS catheterization required the lead to be manipulated through sharp angles. Mean fluoroscopic exposure and procedural times were not significantly different from the overall Biv-P population. In all patients, at a mean follow-up of 11 months, sensing and capture threshold remained stable and a significant decrease in NYHA functional class and increase in LVEF were noted. The direct lead placement in large CS tributaries in the presence of persistent LSVC was feasible and safe. The leads remained stable up to a mean follow-up of nearly 1 year. PMID:12687811

  1. Radiation dose is associated with prognosis of small cell lung cancer with superior vena cava syndrome

    PubMed Central

    Wang, Zhen-Bo; Ning, Fang-Ling; Wang, Xiao-Le; Cheng, Yu-Feng; Dong, Xin-Jun; Liu, Chang-Min; Chen, Shao-Shui

    2015-01-01

    Approximately 10% of small cell lung cancer (SCLC) cases develop superior vena cava syndrome (SVCS). Many SCLC patients with SVCS have relatively limited disease, requiring curative rather than palliative treatment. Besides chemotherapy, radiotherapy is important for treating SCLC with SVCS. We retrospectively evaluated the influence of radiotherapy dose on the prognosis of 57 patients with SCLC with SVCS treated with concurrent chemoradiotherapy. The mean biological equivalent radiation dose was 71.5 Gy. We administered etoposide/cisplatin as sequential and concurrent chemotherapy. All patients received at least one cycle of concurrent chemotherapy. All patients had partial or complete response; SVCS-associated symptoms were reduced in 87.7% (50/57) of patients within 3-10 days after treatment. Radiation dose did not affect 2-year local control (74.2% vs. 80.8%). Patients who received high-dose radiation had a lower 2-year overall survival rate than those who received low-dose radiation (11.6 vs. 33%; P = 0.024). The high dose group median survival was 15.0 months (95% confidence interval [CI]: 11.2-19.0) compared with 18.7 months (95% CI: 13.9-23.6) in the low dose group. Grade 3/4 neutropenia occurred in 22/26 high dose patients (84.6%) and 21/31 low dose patients (67.7%). In the high dose group, 30.8% of patients had grade 3/4 esophagitis compared with 19.4% of low dose patients. Only 29.0% of low dose patients received < 4 cycles of chemotherapy in the first 12 weeks after treatment began compared with 46.2% of high dose patients. Concurrent chemoradiotherapy is a tolerable modality for treating stage IIIA/IIIB SCLC with SVCS. Moderate-dose radiotherapy is preferable.

  2. Robotic repair of sinus venosus atrial septal defect with partial anomalous pulmonary venous return and persistent left superior vena cava.

    PubMed

    Lewis, Clifton T P; Bethencourt, Daniel M; Stephens, Richard L; Cline, Jennifer L; Tyndal, Charles M

    2014-01-01

    The presence of partial anomalous pulmonary venous return and/or persistent left superior vena cava (LSVC) is usually viewed as a contraindication for robotic repair of complex atrial septal defects, such as those of the sinus venosus type. Three patients, aged 29, 73, and 23 years, successfully underwent totally endoscopic, robotic-assisted repair of sinus venosus-type atrial septal defect with partial anomalous pulmonary venous return and persistent LSVC. Two different techniques--direct cannulation or placement of a sump sucker--were successfully used to manage venous return from the persistent LSVC. PMID:25238426

  3. Technical failure to perform cardiac resynchronization therapy: Use of cardiac magnetic resonance imaging techniques to clarify a left-sided superior vena cava and coronary sinus morphology

    PubMed Central

    Keeble, William; Mohiaddin, Raad

    2008-01-01

    The most common reason for failure to implant a left ventricular lead to deliver cardiac resynchronization therapy is the presence of unfavourable coronary venous anatomy. The present report illustrates the use of cardiac magnetic resonance imaging to delineate the anatomy of a left-sided superior vena cava in two patients in whom permanent cardiac pacing was unattainable. PMID:18612503

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

    PubMed

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

    2014-01-01

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

  5. Primary Mediastinal Synovial Sarcoma Presenting as Superior Vena Cava Syndrome: A Rare Case Report and Review of the Literature

    PubMed Central

    Kataria, Pritam; Patel, Apurva; Revannasiddaiah, Swaroop; Anand, Asha; Panchal, Harsha; Parikh, Sonia; Sarkar, Malay; Modi, Gaurang; Kulkarni, Rahul; Shah, Sandip

    2015-01-01

    Primary mediastinal sarcomas are aggressive tumors with a very rare incidence. This report describes the case of a 35-year-old male patient who presented with acute symptoms of dyspnoea, facial puffiness, voice-hoarseness, and engorged neck veins. With the clinical picture consistent with the superior vena cava (SVC) syndrome, the patient was investigated with computed tomography of the chest. This revealed a large soft tissue density mass lesion compressing the SVC along with other critical superior mediastinal structures. Histopathological evaluation of the mass revealed features consistent with a soft tissue sarcoma and positive staining was observed for vimentin and S-100. Cytogenetic analysis by fluorescent in situ hybridisation (FISH) demonstrated the t(X:18) translocation. Thus diagnosis was established as primary mediastinal synovial sarcoma. Patient was treated with three cycles of neoadjuvant chemotherapy, to which there was a partial response as per the RECIST criteria. Surgical excision of the mediastinal mass was performed, and further postoperative treatment with adjuvant chemoradiotherapy was provided. Patient currently is free of disease. This is to the best of our knowledge the first report in the world literature of a successfully treated case of “primary mediastinal sarcomas presenting as SVC syndrome.” Patient is under regular surveillance at our clinic and remains free of recurrence one year after treatment completion.

  6. Minimally invasive video-assisted thoracoscopic left ventricular epicardial lead implantation for biventricular pacing in a patient with persistent left superior vena cava

    Microsoft Academic Search

    Yukihiro Matsuno; Yoshio Mori; Yukio Umeda; Matsuhisa Imaizumi; Hiroshi Takiya

    2008-01-01

    Cardiac resynchronization therapy (CRT) by biventricular pacing reduces symptoms and improves left ventricular function in\\u000a many patients with heart failure due to left ventricular systolic dysfunction and cardiac dyssynchrony. Implantation of the\\u000a biventricular pacing lead in association with persistent left superior vena cava is technically challenging. We report a successful\\u000a case of minimally invasive video-assisted thoracoscopic left ventricular epicardial lead

  7. Electrocardiographic features of ventricular pacing lead in the middle cardiac vein vs. right ventricular apex in a patient with persistent left superior vena cava

    Microsoft Academic Search

    Tien-En Chen; Chun-Chieh Wang; Oruganti Sai Satish; Delon Wu

    2007-01-01

    A 53-year-old woman with sinus node dysfunction underwent dual-chamber pacemaker implantation through a persistent left superior vena cava draining into the coronary sinus, which was detected at the time of implantation. We managed to fix the ventricular lead in the right ventricular (RV) apex by forming a clockwise loop in the right atrium. Inadvertently, the lead was placed in the

  8. [The role of new medical imaging technics (TDM and MRI) in the diagnostic strategies of superior vena cava syndrome].

    PubMed

    Coulomb, M; Moro, D; Le Rumeur, Y; Ranchoup, Y; Pittet, L R; Brambilla, C; Paramelle, B

    1991-01-01

    Superior vena caval syndrome (VCS), is easily recognised in the advanced case, however in the early case without clinical signs its detection is much less easy. New techniques of medical imagery such as IRM and above all computer tomography (TDM) have shown an increasing place in the daily clinical practice of the respiratory physician; these enable an early diagnosis to be made and a work up of the aetiology of the syndrome of VCS. With TDM the obstruction of the VCS appears the sign of direct obstruction (thrombosis or extrinsic compression) and of a collateral venous circulation deriving some anastomoses from the brachio-cephalic venous trunk (TVBC) and the azygos system, the VCS and the inferior vena cava (VCI), the two TVBC at the junction of the median line principally by the suprasternal network and finally these portal systemics, by the veins from the anterior wall of the trunk and the accessory portal veins of the round ligament. IRM introduced more recently enables a direct vision of the causal lesion endo or extra luminally, enabling an early detection of the syndrome by showing signs of a slow down of the venous flow. But the detection of a collateral circulation seems more difficult to demonstrate by this method. PMID:2034856

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

    PubMed Central

    Morgan, Loren Garrison; Gardner, Jonathan

    2015-01-01

    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

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

    PubMed

    Dumantepe, Mert; Tarhan, Arif; Ozler, Azmi

    2013-06-01

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

  11. A Primary Primitive Neuroectodermal Tumor Arising from Left Subclavian Vein and Extending along Left Brachiocephalic Vein and Superior Vena Cava into Right Atrium.

    PubMed

    Wang, Jian; Wang, Weici; Li, Yiqing; Jin, Bi; Yu, Miao; Liu, Wenqi; Yao, Shaohua; Liao, Yonggui; Ouyang, Chenxi

    2015-05-01

    Primitive neuroectodermal tumor (PNET) is an extremely rare malignancy thought to be derived from fetal neuroectodermal precursor cells. It usually occurs in central and peripheral nervous system or soft tissue and bone, while intravenous or intracavitary PNET is considered as an extremely rare tumor. We reported a case of a 44-year-old woman who presented with the left unilateral facial and neck swelling. Magnetic resonance imaging revealed a tape-shaped solid mass within left subclavian vein, left brachiocephalic vein, superior vena cava, and right atrium; the proximal end proportion occupied almost the entire right atrium with a pedicle flip protruded into the right ventricle. Ultrasonography revealed an irregular hypoechnoic mass arising from the left subclavian vein, which extended along the left brachiocephalic vein and superior vena cava into the right atrium and up to the right ventricle. Positron emission tomography-computed tomography revealed several hypermetabolic thyroid nodules with no evidence of intravenous hyperactive lesion. The patient underwent tumor resection under cardiopulmonary bypass. At 15 days postoperatively, total thyroidectomy and resection of the left subclavian vein were simultaneously performed. The patient received chemotherapy and radiotherapy later. Histologically, the neoplasm displayed small, round, blue cells with hyperchromatic nuclei and scant cytoplasm. The neoplastic cells showed a strong immunopositivity for CD99, synaptophysin, CD56, CD57, and friend leukemia integration 1, thus confirming a diagnosis of the PNET. Histopathological examination of the thyroid showed papillary carcinoma. Thus, this PNET had no definitive organ or tissue of origin, which primarily originated from the left subclavian vein with tumor extension along the superior vena cava to the right ventricle. PMID:25725277

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

    SciTech Connect

    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

    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.

  13. Brain Abscess Associated with Isolated Left Superior Vena Cava Draining into the Left Atrium in the Absence of Coronary Sinus and Atrial Septal Defect

    SciTech Connect

    Erol, Ilknur [Baskent University Faculty of Medicine, Department of Pediatrics, Pediatric Neurology Unit (Turkey)], E-mail: ilknur_erol@yahoo.co; Cetin, I. Ilker [Baskent University Faculty of Medicine, Department of Pediatrics, Pediatric Cardiology Unit (Turkey); Alehan, Fuesun [Baskent University Faculty of Medicine, Department of Pediatrics, Pediatric Neurology Unit (Turkey); Varan, Birguel [Baskent University Faculty of Medicine, Department of Pediatrics, Pediatric Cardiology Unit (Turkey); Ozkan, Sueleyman [Baskent University Faculty of Medicine, Department of Cardiovascular Surgery (Turkey); Agildere, A. Muhtesem [Baskent University Faculty of Medicine, Department of Radiology (Turkey); Tokel, Kursad [Baskent University Faculty of Medicine, Department of Pediatrics, Pediatric Cardiology Unit (Turkey)

    2006-06-15

    A previously healthy 12-year-old girl presented with severe headache for 2 weeks. On physical examination, there was finger clubbing without apparent cyanosis. Neurological examination revealed only papiledema without focal neurologic signs. Cerebral magnetic resonance imaging showed the characteristic features of brain abscess in the left frontal lobe. Cardiologic workup to exclude a right-to-left shunt showed an abnormality of the systemic venous drainage: presence of isolated left superior vena cava draining into the left atrium in the absence of coronary sinus and atrial septal defect. This anomaly is rare, because only a few other cases have been reported.

  14. Liver Trapping of 99mTc Macroaggregated Albumin During Ventilation/Perfusion Scintigraphy in a Patient With Superior Vena Cava Stenosis as Demonstrated by SPECT/CT.

    PubMed

    Rousseau, Etienne; Leclerc, Yves; Prévost, Sylvain; Keu, Khun Visith

    2015-07-01

    A 50-year-old woman presented to our institution with a 1-day history of right posterior thoracic pain and dyspnea. She had a previous history of conservative resection of a high-grade basal-like infiltrating ductal carcinoma of the right breast 2 years before, subsequently treated by chemotherapy and radiotherapy. A ventilation and perfusion (VQ) scintigraphy performed for suspected pulmonary embolism showed an abnormal deposition of Tc macroaggregated albumin (Tc-MAA) in the left lobe of the liver. This unusual finding prompted additional imaging that demonstrated a superior vena cava stenosis. PMID:26018706

  15. Repositioning and Leaving In Situ the Central Venous Catheter During Percutaneous Treatment of Associated Superior Vena Cava Syndrome: A Report of Eight Cases

    SciTech Connect

    Stockx, Luc; Raat, Henricus [Department of Radiology, Catholic University of Leuven, University Hospitals, Herestraat 49, B-3000 Leuven (Belgium); Donck, Jan [Department of Nephrology, Catholic University of Leuven, University Hospitals, Herestraat 49, B-3000 Leuven (Belgium); Wilms, Guy; Marchal, Guy [Department of Radiology, Catholic University of Leuven, University Hospitals, Herestraat 49, B-3000 Leuven (Belgium)

    1999-05-15

    Purpose: To describe a combined procedure of repositioning and leaving in situ a central venous catheter followed by immediate percutaneous treatment of associated superior vena cava syndrome (SVCS). Methods: Eight patients are presented who have central venous catheter-associated SVCS (n = 6 Hickman catheters, n = 2 Port-a-cath) caused by central vein stenosis (n = 4) or concomitant thrombosis (n = 4). With the use of a vascular snare introduced via the transcubital or transjugular approach, the tip of the central venous catheter could be engaged, and repositioned after deployment of a stent in the innominate or superior vena cava. Results: In all patients it was technically feasible to reposition the central venous catheter and treat the SVCS at the same time. In one patient flipping of the Hickman catheter in its original position provoked dislocation of the released Palmaz stent, which could be positioned in the right common iliac vein. Conclusion: Repositioning of a central venous catheter just before and after stent deployment in SVCS is technically feasible and a better alternative than preprocedural removal of the vascular access.

  16. Rare case of persistent left superior vena cava to left upper pulmonary vein: pathway for paradoxical embolization and development of transient ischemic attack and subsequent occlusion with an amplatzer vascular plug.

    PubMed

    Recto, Michael R; Sadlo, Henry; Sobczyk, Walter L

    2007-10-01

    We report the successful transcatheter closure of a large persistent left superior vena cava draining into a left upper pulmonary vein in a patient who suffered 2 transient ischemic attacks after intravenous (IV) injection of saline flush solution into a left arm peripheral IV line utilizing an Amplatzer Vascular Plug. PMID:17906359

  17. Coexistence of Obstructive Sleep Apnea and Superior Vena Cava Syndromes Due to Substernal Goitre in a Patient With Respiratory Failure: A Case Report

    PubMed Central

    Tunc, Mehtap; Sazak, Hilal; Karlilar, Bulent; Ulus, Fatma; Tastepe, Irfan

    2015-01-01

    Introduction: Substernal goiter may rarely cause superior vena cava syndrome (SVCS) owing to venous compression, and cause acute respiratory failure due to tracheal compression. Obstructive sleep apnea syndrome (OSAS) may rarely occur when there is a narrowing of upper airway by edema and vascular congestion resulting from SVCS. Case Presentation: We presented the clinical course and treatment of acute respiratory failure (ARF) developed in a patient with SVCS and OSAS due to substernal goiter. After treatment of ARF with invasive mechanical ventilation, weaning and total thyroidectomy were successfully performed through collar incision and median sternotomy without complications. Conclusions: Our case showed that if the respiratory failure occurred due to substernal goiter and SVCS, we would need to investigate the coexistence of OSAS and SVCS.

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

    SciTech Connect

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

    2007-09-15

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

  19. 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

    2014-01-01

    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

  20. FINANCIACIÓN Y DEMANDA DE EDUCACIÓN SUPERIOR ESTUDIO DEL CASO EN COLOMBIA (1990-2005)

    Microsoft Academic Search

    Isabel Ruiz; Carlos Andrés Cano; Isabel Cristina Montes

    2008-01-01

    Esta investigación tiene como objetivo identificar la relación existente entre la demanda por educación superior y variables relacionadas a su financiación. En particular, se analiza como la financiación pública y privada, y además las señales del mercado laboral explican las matrículas en educación superior en tres regiones de Colombia: Bogotá, Cali y Medellín. El estudio se realiza a través de

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

    Microsoft Academic Search

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

    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

  2. Vena Cava Occlusion: Balloon Design

    Microsoft Academic Search

    J. F. Sturgeon; K. J. Oconnor; R. W. Snyder

    1977-01-01

    Various considerations in the development of a natural rubber balloon for vascular occlusion, particularly vena cava occlusion are summarized. The physical properties of the rubber necessary for occlusion are discussed. Since the balloon must remain inflated for at least 4 to 12 weeks after implantation, the balloon should be impermeable to the inflation medium. A measure of the impermeability incorporated

  3. Catheter ablation of atrial arrhythmias in a patient with surgically corrected congenital heart disease and inferior vena cava interruption

    PubMed Central

    Krishnamoorthy, Jaishankar; Shah, Ruchit A.; Sankaradas, Mullasari Ajit

    2014-01-01

    A 15 year old girl who underwent surgical correction of ventricular septal defect and patent ductus arteriosus ligation in childhood presented with atrial tachycardia of crista terminalis origin and counterclockwise atrial flutter. She also had associated interruption of inferior vena cava which continued as azygous vein and left superior vena cava which drained via coronary sinus into the right atrium. She underwent radiofrequency ablation of both the tachycardias via internal jugular vein and azygous vein approach using 3D electroanatomical mapping system.

  4. [Traumatic thrombosis of the inferior vena cava].

    PubMed

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

    2004-07-01

    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

  5. Update on vena cava filters

    Microsoft Academic Search

    Teresa L. Carman; Alaa Alahmad

    2008-01-01

    Opinion statement  Inferior vena cava (IVC) filter placement has increased dramatically over the past two decades. Filters are indicated to prevent\\u000a pulmonary embolism in patients with venous thromboembolism (VTE) and a contraindication to anticoagulation or a complication\\u000a of anticoagulation. Some of this increased use is the result of expanding relative indications for filter placement, including\\u000a placement for primary prophylaxis. The US

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

    SciTech Connect

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

    2010-06-15

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

  7. Inferior Vena Cava Filters for Recurrent Thrombosis

    PubMed Central

    Patel, Salil H.; Patel, Rima

    2007-01-01

    Inferior vena cava filters are often used as alternatives to anticoagulant therapy for the prevention of pulmonary embolism. Many of the clinical data that support the use of these devices stem from relatively limited retrospective studies. The dual purpose of this review is to examine the incidence of thrombotic complications associated with inferior vena cava filters and to discuss the role of anticoagulant therapy concurrent with filter placement. Device-associated morbidity and overall efficacy can be considered only in the context of rates of vena cava thrombosis, insertion-site thrombosis, recurrent deep venous thrombosis, and recurrent pulmonary embolism. PMID:17622366

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

    PubMed

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

    2015-01-01

    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

  9. [Congenital anomalies of the inferior vena cava: diagnosis and medical treatment].

    PubMed

    Baeshko, A A; Zhuk, G V; Orlovski?, Iu N; Ulezko, E A; Savitskaia, T V; Goretskaia, I V; Egorova, V V; Somova, O A

    2007-01-01

    Analyzed herein are the findings obtained following an examination and medical treatment of five 17-to-39-year-old male patients (average age 25.0+/-1.83 years) presenting with congenital abnormalities of the inferior vena cava. The diagnosis was made and the level of aplasia was determined based on the findings of a comprehensive instrumental examination (computed and magnetic resonance tomography of the abdominal cavity, duplex scanning of the veins of the lower extremities, of the pelvis and the retroperitoneal space, as well as on the data of pelvic phlebography, and retrograde cavography). In three of the five patients, the disease appeared to have for the first time manifested itself by a clinical picture of peripheral thrombosis (oedema of the crus and femur), and in the remaining two by an elevated body temperature and shivering, followed by oedema of the both lower limbs. Two patients were found to have aplasia of the infrarenal segment of the inferior vena cava, two subjects had aplasia of the infra-, renal and partially suprarenal portions of the vessel, and one patient suffered from aplasia of virtually the whole vena cava, excepting a small part of the suprahepatic portion, toward which converged the hepatic veins and the superior polar renal vein. With the purpose of early diagnosis of congenital abnormalities of the inferior vena cava, the protocol of examination of patients with venous diseases should include ultrasonographic mapping of the supra-, renal and infrarenal portions of the vena cava, and if agenesis is revealed, the use of computed or magnetic resonance tomography, retrograde cavography is strongly recommended. When the diagnosis of IVC aplasia is confirmed, primary medical treatment should consist in prescribing venotonic agents, elastic compression and in cases of deep veins thrombosis -anticoagulant therapy. PMID:17679979

  10. Complex malformation of the inferior vena cava.

    PubMed

    Lesanu, G; Balanescu, R; Pacurar, D; Iaru, O; Vlad, R M; Topor, L; Oraseanu, D

    2014-01-01

    Malformations of the inferior vena cava (IVC) are rare presentations, exceptional in children, and are usually asymptomatic.They are caused by disturbances in the embryological formation of the venous system or can develop as a result of perinatal venous thrombosis with secondary impairment of the venous development. We report the case of a 14 year old boy,admitted for pediatric evaluation before undergoing plastic surgery in order to remove superficial varicose veins of the lower abdomen. The patient presents with inequality in circumference and length of the legs. Laboratory investigations are normal and the abdominal ultrasound describes hypoplasia of the retrohepatic segment of the inferior vena cava. The diagnosis of complex malformation of the abdominal deep venous system (retrohepatic vena cava atresia, cavo-caval anastomosis through azygos veins, abnormal formation of the inferior vena cava with the absence of the left iliac vein) was established through a CT angiography. The presence of abdominal varicose dilations should indicate the necessity to closely look for malformations of the portal and/or caval venous systems. PMID:24742422

  11. Isolated dilatation of the inferior vena cava

    PubMed Central

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

    2014-01-01

    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

  12. Leiomyosarcoma of the Inferior Vena Cava

    PubMed Central

    Sadri, Ben Abid; Amine, Attaoui Mohamed; Zeineb, Mzoughi; Nizar, Miloudi; Lassad, Gharbi; Khalfallah, Mohamed Tahar

    2013-01-01

    Vascular leiomyosarcoma (LMS) are unique. The inferior vena cava (IVC) is the most affected organ (about 38% cases). We report the observation of a 50-year old woman who consulted for right upper quadrant pain. Imaging studies revealed a retroperitoneal mass that mimic a LMS of the IVC. The patient was operated. A resection of the IVC along with the tumor was performed without reconstruction. The management of LMS is surgical and depends upon the location and tumor characteristics. PMID:24765501

  13. [Renal angiomyolipoma with inferior vena cava thrombosis during pregnancy].

    PubMed

    Bidault, V; Pignot, G; Rocher, L; Glas, L; Patard, J-J

    2015-04-01

    The diagnosis of angiomyolipoma with tumor thrombus from the renal vein into the inferior vena cava is rare, especially during pregnancy. We report the case of a 31-year-old pregnant woman who was diagnosed with a 9 cm angiomyolipoma of the right kidney with inferior vena cava thrombosis, managed by active surveillance during pregnancy and delayed surgery after childbirth. PMID:25638747

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

    SciTech Connect

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

    2008-02-04

    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.

  15. Flow characteristics of the proximal pulmonary arteries and vena cava in patients with chronic thromboembolic pulmonary hypertension: correlation between 3.0 T phase-contrast MRI and right heart catheterization

    PubMed Central

    Guo, Xiaojuan; Liu, Min; Ma, Zhanhong; Wang, Shuangkun; Yang, Yuanhua; Zhai, Zhenguo; Wang, Chen; Zhai, Renyou

    2014-01-01

    PURPOSE We aimed to determine the correlation between flow characteristics of the proximal pulmonary arteries and vena cava obtained by 3.0 T phase-contrast magnetic resonance imaging (MRI) and hemodynamic characteristics by right heart catheterization in patients with chronic thromboembolic pulmonary hypertension. MATERIALS AND METHODS Twenty consecutive patients with chronic thromboembolic pulmonary hypertension and 20 sex- and age-matched healthy volunteers were included prospectively. All patients and controls underwent phase-contrast MRI to determine the flow characteristics including peak velocity, mean velocity, and mean blood flow of the proximal pulmonary artery and vena cava. All patients underwent right heart catheterization to determine the hemodynamics. RESULTS Peak velocity and mean velocity of the proximal pulmonary artery were significantly lower in the patient group. In patients, both peak velocity and mean blood flow were sequentially decreased in the main pulmonary artery, left and right pulmonary arteries, and left and right interlobar pulmonary arteries. Inferior vena cava had higher peak velocity, mean velocity, and mean blood flow than superior vena cava. Peak velocity of the main pulmonary artery correlated with mean and diastolic pulmonary artery pressure. Peak velocity of both inferior and superior vena cava strongly correlated with the pulmonary vascular resistance index (PVRI) (r=?0.68, P < 0.001 and r=?0.74, P < 0.001, respectively). Mean velocity of the main pulmonary artery and right pulmonary artery strongly correlated with PVRI and mean pulmonary artery pressure. Mean velocity of the superior vena cava and mean blood flow of the main pulmonary artery strongly correlated with PVRI and right cardiac work index. CONCLUSION Blood flow in the proximal pulmonary artery and vena cava evaluated by phase-contrast MRI correlate with hemodynamic parameters of right heart catheterization and can be used to noninvasively evaluate the severity of chronic thromboembolic pulmonary hypertension and, potentially, to follow up the treatment response. PMID:25163757

  16. Inferior vena cava filters for recurrent thrombosis: current evidence.

    PubMed

    Patel, Salil H; Patel, Rima

    2007-01-01

    Inferior vena cava filters are often used as alternatives to anticoagulant therapy for the prevention of pulmonary embolism. Many of the clinical data that support the use of these devices stem from relatively limited retrospective studies. The dual purpose of this review is to examine the incidence of thrombotic complications associated with inferior vena cava filters and to discuss the role of anticoagulant therapy concurrent with filter placement. Device-associated morbidity and overall efficacy can be considered only in the context of rates of vena cava thrombosis, insertion-site thrombosis, recurrent deep venous thrombosis, and recurrent pulmonary embolism. PMID:17622366

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

    NASA Astrophysics Data System (ADS)

    Real, Raimundo; Báez, José Carlos

    2013-05-01

    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.

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

    PubMed

    Real, Raimundo; Báez, José Carlos

    2013-05-01

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

  19. Vena cava as autologous tissue for pulmonary valve substitute.

    PubMed

    Scharfschwerdt, Michael; Sievers, Hans-H; von Heinz, Marie; Schmidtke, Claudia

    2008-12-01

    In this study, we report on our first experience with the construction of a valve using autologous vena cava tissue for right ventricular outflow tract reconstruction. Simulating the clinical situation valves were built from tubular pieces of porcine inferior vena cava placed in a PTFE tube and investigated in a pulsatile flow simulator. Based on the given vena cava dimensions, conduits were constructed with diameters of 19 mm in bicuspid or tricuspid and 22 mm and 24 mm in bicuspid configuration. The lowest pressure gradients were observed in the 22 mm vena cava valves in bicuspid configuration (8.6+/-0.5 mmHg) compared to 24 mm valves (10.6+/-0.9 mmHg, P=0.0004) and 19 mm valves (13.4+/-1.5 mmHg, P=0.005). No differences could be found between 19 mm bicuspid and tricuspid valves. Concerning valve opening movements, a complete opening in the 19 mm and a nearly unhindered opening in 22 mm valves were registered. In 24 mm valves opening was incomplete. Leakage was increased in 19 mm bicuspid valves due to leaflet prolapse. In conclusion, construction of a valve mechanism from vena cava tissue is feasible. The in-vitro hemodynamic results are encouraging, animal experiments are ongoing to investigate the midterm function of these valves. PMID:18718954

  20. Pediatric child abuse victim with posttraumatic inferior vena cava thrombosis.

    PubMed

    Goodpasture, Meggan L; Zeller, Kristen A; Petty, John K

    2014-05-01

    Posttraumatic inferior vena cava thrombosis (IVCT) is very rare, with only a few cases reported in the literature. While thromboembolism as a result of trauma is common in adult patients, it is very rare in young children and seldom involves the inferior vena cava. We report the youngest patient to date with IVCT and the only child reported whose findings are the result of child physical abuse. The diagnosis can be challenging both clinically and radiographically. Additionally, the risks of morbidity and even mortality associated with an IVCT if untreated are significant. PMID:24578163

  1. Long term complications of inferior vena cava thrombosis

    Microsoft Academic Search

    M Häusler; D Hübner; T Delhaas; E G Mühler

    2001-01-01

    AIMTo evaluate the long term outcome after paediatric inferior vena cava (IVC) thrombosis.METHODSA combined retrospective and prospective study on infants and children with IVC thrombosis treated at Aachen and Maastricht University Hospitals between 1980 and 1999.RESULTSForty patients were enrolled, including four with preceding cardiac catheterisation, 18 with central venous saphenous lines, and an additional eight with umbilical venous catheters. Six

  2. Asymptomatic Lumbar Vertebral Erosion from Inferior Vena Cava Filter Perforation

    SciTech Connect

    Fang, Wayne, E-mail: wafang@wi.rr.com; Hieb, Robert A.; Olson, Eric; Carrera, Guillermo F. [Froedtert Hospital and Medical College of Wisconsin, Department of Radiology (United States)

    2007-06-15

    In 2002, a 24-year-old female trauma patient underwent prophylactic inferior vena cava filter placement. Recurrent bouts of renal stones prompted serial CT imaging in 2004. In this brief report, we describe erosion and ossification of the L3 vertebral body by a Greenfield filter strut.

  3. Inferior vena cava filter presenting as chronic low back pain

    Microsoft Academic Search

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

    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

  4. [Desmoid tumor of mediastinum revealed by superior vena cava syndrome and tamponade].

    PubMed

    Serraj, M; Smahi, M; Znati, K; El Hattab, A; Amara, B; El Biaze, M; Benjelloun, M C; Amarti, A

    2012-06-01

    Desmoid tumors are rare forms of low grade malignancies. They are characterized by a strong potential of local invasion. Although they are considered histologically benign they behave aggressive locally. They typically occur in the abdominal wall or within the abdomen. Mediastinal localisation is very rare. The only curative treatment is wide surgical excision but the surgery is difficult and the risk of local recurrence is high. PMID:22197159

  5. Inferior Vena Cava Anomaly: A Risk for Deep Vein Thrombosis

    PubMed Central

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

    2014-01-01

    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

  6. Douglas Oliver SUPERIOR OLIVE

    E-print Network

    Oliver, Douglas L.

    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

  7. [Case report: Membranous obstruction of the inferior vena cava associated with hepatocellular carcinoma].

    PubMed

    Kebapçi, Mahmut; Aktar, Murat; Adapinar, Baki; Kaya, Tamer

    2003-03-01

    The incidence of membranous obstruction of the inferior vena cava is rare, but the diagnosis is essential because of the association of this lesion with portal fibrosis and hepatocellular carcinoma. In membranous obstruction of the inferior vena cava, the hepatic segment of the inferior vena cava is obstructed by a fibromuscular membrane or replaced by a cordlike fibrous tissue. We report the computed tomography and ultrasound findings of a 45 year old patient with membranous obstruction of the inferior vena cava and hepatocellular carcinoma. PMID:14661296

  8. Modeling Flow Past a Tilted Vena Cava Filter

    SciTech Connect

    Singer, M A; Wang, S L

    2009-06-29

    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.

  9. Experimental investigation of the effects of inserting a bovine venous valve in the inferior vena cava of Fontan circulation

    NASA Astrophysics Data System (ADS)

    Santhanakrishnan, Arvind; Johnson, Jacob; Kotz, Monica; Tang, Elaine; Khiabani, Reza; Yoganathan, Ajit; Maher, Kevin

    2012-11-01

    The Fontan procedure is a palliative surgery performed on patients with single ventricle (SV) congenital heart defects. The SV is used for systemic circulation and the venous return from the inferior vena cava (IVC) and superior vena cava (SVC) is routed to the pulmonary arteries (PA), resulting in a total cavopulmonary connection (TCPC). Hepatic venous hypertension is commonly manifested in the Fontan circulation, leading to long-term complications including liver congestion and cirrhosis. Respiratory intrathoracic pressure changes affect the venous return from the IVC to the PA. Using a physical model of an idealized TCPC, we examine placement of a unidirectional bovine venous valve within the IVC as a method of alleviating hepatic venous hypertension. A piston pump is used to provide pulsatility in the internal flow through the TCPC, while intrathoracic pressure fluctuations are imposed on the external walls of the model using a pair of linear actuators. When implanted in the extrathoracic position, the hepatic venous pressure is lowered from baseline condition. The effects of changing caval flow distribution and intrathoracic pressure on TCPC hemodynamics will be examined.

  10. Endovascular reconstruction of an interrupted inferior vena cava?

    PubMed Central

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

    2013-01-01

    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

  11. Automatic Inferior Vena Cava Segmentation for Hepatic Surgery Planning in Contrast-Enhanced CT Images

    E-print Network

    Boyer, Edmond

    Automatic Inferior Vena Cava Segmentation for Hepatic Surgery Planning in Contrast-Enhanced CT : Switzerland (2010)" DOI : 10.1007/s11548-010-0442-7 #12;Automatic Inferior Vena Cava Segmentation for Hepatic the only possible cure. The surgery ranges from liver resection, where diseased tissue is removed, to full

  12. Inferior Vena Cava Agenesia and a Massive Bilateral Iliofemoral Venous Thrombosis

    Microsoft Academic Search

    Zeljko Vucicevic; Vesna Degoricija; Zrinka Alfirevic; Mirella Sharma

    2008-01-01

    The absence of the inferior vena cava is a rare congenital anomaly and represents a modest risk for deep-venous thrombosis. When associated with genetic polymorphism or other hypercoagulable states, the risk can increase several times. A case of young man with the inferior vena cava agenesia and deep-venous thrombosis of both legs triggered by the physical effort is reported. The

  13. Cursos tcnicos superiores profissionais

    E-print Network

    Instituto de Sistemas e Robotica

    OPINIÃO Cursos técnicos superiores profissionais PEDRO LOURTIE Professor aposentado do Instituto Superior Técnico. Foi publicado o decreto-lei que cria os cursos de técnicos superiores profis- sionais, cursos superiores de ciclo cur- to que não conferem grau académico. Os cursos, tal como definidos

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

    PubMed Central

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

    2011-01-01

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

  15. Fatal Pulmonary Thromboembolism due to Inferior Vena Cava Thrombosis

    PubMed Central

    Hanterdsith, Boonsak

    2011-01-01

    Pulmonary embolism (PE) is one of the most undiagnosed causes of death, and more than half of fatal PE is discovered only during autopsy. The author reports a case of sudden death from massive pulmonary thromboembolism due to an inferior vena cava (IVC) thrombosis caused by chronic pancreatitis. An extensive search for the location of the thrombus identified the source of emboli. The probable mechanism of IVC thrombosis caused by chronic pancreatitis is discussed. Awareness of this serious complication of chronic pancreatitis may have prevented the sudden death. PMID:23555441

  16. Retrievable Inferior Vena Cava Filters for Venous Thromboembolism

    PubMed Central

    Win, Lei Lei

    2013-01-01

    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

  17. Perforation of inferior vena cava during filter placement.

    PubMed

    Piecuch, J; Wiewiora, M; Nowowiejska-Wiewiora, A; Szkodzinski, J; Polonski, L

    2011-03-01

    The placement of an inferior vena cava (IVC) filter is a therapeutic method for selected patients with deep venous thrombosis and pulmonary embolism. However, insertion and placement of the filter may be associated with certain complications. For instance, retroperitoneal hematoma resulting from perforation of the wall by the filter is such a very rare but serious complication. We report the case of a 64-year-old woman with perforation of the IVC wall and consecutive hematoma caused by the filter who was treated surgically. PMID:21500182

  18. Asymptomatic Duodenal Perforation from an Inferior Vena Cava Filter

    PubMed Central

    Park, Jean R.; Oza, Veeral M.

    2014-01-01

    Recent exponential increase in inferior vena cava (IVC) filter placements has led to a higher rate of filter complications. A 46-year-old man with a past history of IVC filter placement for bilateral deep vein thrombosis presented with lower abdominal pain. Imaging studies demonstrated IVC filter strut penetrations into multiple structures. Upper endoscopy confirmed an uncomplicated single IVC filter strut penetration into the duodenal wall. The abdominal pain was determined to be unrelated to IVC filter strut penetration, and the patient was managed conservatively. Although IVC filter strut penetrations can cause significant complications, current guidelines remain unclear for management of asymptomatic enteric IVC filter strut penetrations.

  19. Advanced Techniques for Removal of Retrievable Inferior Vena Cava Filters

    SciTech Connect

    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

    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.

  20. Fractured inferior vena cava filter strut presenting with ST-segment elevation and cardiac tamponade.

    PubMed

    Khurana, Dheeraj; Raza, Jaffar; Abrol, Sunil; Coplan, Neil L

    2015-04-01

    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

  1. Long-term experience with management of renal cell carcinoma involving the inferior vena cava

    Microsoft Academic Search

    Nabil K Bissada; Hossam H Yakout; Aga Babanouri; Tarek Elsalamony; Wahib Fahmy; Moustafa Gunham; Gerald W Hull; Uzair B Chaudhary

    2003-01-01

    ObjectivesTo evaluate the long-term outcome and prognosis and influence of patient and tumor characteristics and therapeutic interventions on patients with renal cell carcinoma (RCC) extending to the inferior vena cava (IVC).

  2. Management of inferior vena cava thrombosis after blunt liver injury

    PubMed Central

    Kim, Kyung-Yun; So, Byung-Jun

    2014-01-01

    Inferior vena cava (IVC) thrombosis after traumatic liver injury is an extremely rare condition, and only 12 cases have been reported in the English literature since 1911. We report a case of a 26-year-old man who presented with IVC thrombosis after blunt liver injury. IVC thrombosis was incidentally detected by computed tomography 15 days after conservative management of blunt liver injury. The patient denied any symptoms of thrombophlebitis and did not have any evidence of hypercoagulable state. We placed an IVC filter via the right jugular vein and started the anticoagulation treatment. The patient recovered successfully without operative treatment and IVC thrombosis disappeared completely two months later. We suggest that that the possibility of IVC thrombosis should be considered in patients with a large hematoma of the liver, which may cause compression of the IVC.

  3. Condiciones de admisin a los ciclos superiores D.E.S.E. Maestra Doctorado

    E-print Network

    Meunier, Michel

    estudios para obtener el diploma de ingeniero (o lo equivalente). En ciertos casos, algunas exigencias oCondiciones de admisión a los ciclos superiores D.E.S.E. Maestría Doctorado 1. DIPLOMA DE ESTUDIOS SUPERIORES ESPECIALIZADOS (D.E.S.E.) 1.1 Pueden postular para el diploma de estudios superiores

  4. Study of the mineral profile of Catalonian “brut” cava using atomic spectrometric methods

    Microsoft Academic Search

    Angeles Jos; Isabel Moreno; A. Gustavo González; Miguel López-Artíguez; AnaMaría Cameán

    2004-01-01

    The aim of this study was to investigate the content of several metals in different commercial sparkling wines, all of them with the denomination of origin “cava”, in order to characterise them. Sixteen metals were determined in 18 samples of cava by inductively coupled plasma atomic-emission spectrometry (ICP-AES), hydride generation atomic-absorption spectrometry (HG-AAS) and graphite furnace atomic-absorption spectrometry (GF-AAS). Al,

  5. Successful Percutaneous Retrieval of an Inferior Vena Cava Filter Migrating to the Right Ventricle in a Bariatric Patient

    SciTech Connect

    Veerapong, Jula [University of Chicago Hospitals, Department of General Surgery (United States); Wahlgren, Carl Magnus, E-mail: carl.wahlgren@karolinska.s [University of Chicago Hospitals, Section of Vascular Surgery, Department of Surgery (United States); Jolly, Neeraj [University of Chicago Hospitals, Section of Interventional Cardiology, Department of Medicine (United States); Bassiouny, Hisham [University of Chicago Hospitals, Section of Vascular Surgery, Department of Surgery (United States)

    2008-07-15

    The use of an inferior vena cava filter has an important role in the management of patients who are at high risk for development of pulmonary embolism. Migration is a rare but known complication of inferior vena cava filter placement. We herein describe a case of a prophylactic retrievable vena cava filter migrating to the right ventricle in a bariatric patient. The filter was retrieved percutaneously by transjugular approach and the patient did well postoperatively. A review of the current literature is given.

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

    PubMed

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

    2013-01-01

    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

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

    PubMed

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

    2011-03-01

    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

  8. Evaluation of Retrievability of the Gunther Tulip Vena Cava Filter

    SciTech Connect

    Yamagami, Takuji, E-mail: yamagami@koto.kpu-m.ac.jp; Kato, Takeharu; Hirota, Tatsuya; Yoshimatsu, Rika; Matsumoto, Tomohiro; Nishimura, Tsunehiko [Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Department of Radiology (Japan)

    2007-04-15

    Purpose. To evaluate the feasibility and safety of withdrawal of a Gunther tulip retrievable vena cava filter (GTF). Methods. Between June 2001 and December 2005, at our institution 86 GTFs were implanted for temporary caval filtration in 59 patients (37 women, 22 men; mean age 59.3 years, range 18-87 years). For GTFs retrieved thereafter, we retrospectively reviewed the following parameters: rate of success in retrieval, degree of trapped thrombus in the filter, and complications during retrieval. Results. Worsening of or new development of pulmonary embolism after filter implantation did not occur in any patient. Of the 86 GTFs implanted, retrieval of 80 was attempted. Among those 80 filters, 77 (96%) were successfully retrieved (with the standard method, n = 72; with the modified method, n = 5) without any complication. The period of implantation of the retrieved filters was 13.4 {+-} 4.2 days. In the 5 filters that were filled to a height of {>=} 1/4 with trapped thrombus, retrieval was performed after attempts were made to decrease trapped thrombi. In addition, a temporary filter or another GTF was temporarily placed at the cephalad level of the GTF during this removal procedure. Conclusion. GTFs can be retrieved in the majority of cases. Even when encountering situations in which the filter could not be removed using the standard method, withdrawal was possible in a high frequency of cases through various trials using modified methods.

  9. Imaging the inferior vena cava: a road less traveled.

    PubMed

    Kandpal, Harsh; Sharma, Raju; Gamangatti, Shiva; Srivastava, Deep N; Vashisht, Sushma

    2008-01-01

    A broad spectrum of congenital anomalies and pathologic conditions can affect the inferior vena cava (IVC). Most congenital anomalies are asymptomatic; consequently, an awareness of their existence and imaging appearances is necessary to avoid misinterpretation. Imaging also plays a central role in the diagnosis of Budd-Chiari syndrome secondary to membranous obstruction of the intrahepatic IVC. Primary malignancy of the IVC is far less common than intracaval extension of malignant tumors arising in adjacent organs, and imaging can accurately help determine the presence and extent of tumor thrombus, information that is crucial for surgical planning. However, the radiologist should be aware that artifactual filling defects at computed tomography and magnetic resonance imaging can mimic true thrombus in the IVC and must be able to differentiate true from pseudo filling defects. Other imaging findings such as flat IVC and early enhancement of the IVC are useful in limiting the differential diagnosis. Familiarity with the imaging features of the various congenital and pathologic entities that can affect the IVC is paramount for early diagnosis and management. PMID:18480478

  10. Computed tomographic characteristics of collateral venous pathways in dogs with caudal vena cava obstruction.

    PubMed

    Specchi, Swan; d'Anjou, Marc-André; Carmel, Eric Norman; Bertolini, Giovanna

    2014-01-01

    Collateral venous pathways develop in dogs with obstruction or increased blood flow resistance at any level of the caudal vena cava in order to maintain venous drainage to the right atrium. The purpose of this retrospective study was to describe the sites, causes of obstruction, and configurations of venous collateral pathways for a group of dogs with caudal vena cava obstruction. Computed tomography databases from two veterinary hospitals were searched for dogs with a diagnosis of caudal vena cava obstruction and multidetector row computed tomographic angiographic (CTA) scans that included the entire caudal vena cava. Images for each included dog were retrieved and collateral venous pathways were characterized using image postprocessing and a classification system previously reported for humans. A total of nine dogs met inclusion criteria and four major collateral venous pathways were identified: deep (n = 2), portal (n = 2), intermediate (n = 7), and superficial (n = 5). More than one collateral venous pathway was present in 5 dogs. An alternative pathway consisting of renal subcapsular collateral veins, arising mainly from the caudal pole of both kidneys, was found in three dogs. In conclusion, findings indicated that collateral venous pathway patterns similar to those described in humans are also present in dogs with caudal vena cava obstruction. These collateral pathways need to be distinguished from other vascular anomalies in dogs. Postprocessing of multidetector-row CTA images allowed delineation of the course of these complicated venous pathways and may be a helpful adjunct for treatment planning in future cases. PMID:24762097

  11. Temporary and permanent inferior vena cava filter combination in a young patient: to implant or not to implant?

    PubMed

    Kutlu, Ramazan; Alkan, Alpay; Sigirci, Ahmet; Altinok, Tayfun; Yildirim, Zeki

    2003-01-01

    The decision to implant vena cava filters, either temporary or permanent, is difficult in young patients. We present the case of a young man with pulmonary embolism in whom temporary and permanent inferior vena cava filters were implanted. The decision process is discussed in relation to the current literature. PMID:14753313

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

    NASA Technical Reports Server (NTRS)

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

    1971-01-01

    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.

  13. Design optimization of vena cava filters: an application to dual filtration devices.

    PubMed

    Singer, Michael A; Wang, Stephen L; Diachin, Darin P

    2010-10-01

    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 a trapped model thrombus in the inferior vena cava. The location and shape of the thrombus are parametrized, 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 the thrombus trapped along the cava wall reduces the disruption to the flow but increases the area exposed to low wall shear stress. Computer-based design optimization is a useful tool for developing vena cava filters. Characterizing and parametrizing 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. PMID:20887016

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

    SciTech Connect

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

    2009-12-03

    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.

  15. Large adrenocortical carcinoma extending into the inferior vena cava and right atrium.

    PubMed

    Hisham, A N; Sarojah, A; Zanariah, H

    2003-01-01

    A case of large adrenocortical carcinoma extending into the inferior vena cava and right atrium is reported. Computed tomography showed a large mass displacing the left kidney inferiorly with an intravascular tumour thrombus extending into the inferior vena cava and right atrium. Radical surgery under hypothermia and cardiopulmonary bypass was performed and the tumour mass, together with the tumour thrombus, was successfully removed. The presence of intravascular tumour extension alone should not be a contraindication to radical surgical therapy, as it is the best hope for prolonged survival. PMID:12527494

  16. 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...

  17. Cranial vena cava syndrome secondary to cryptococcal mediastinal granuloma in a cat.

    PubMed

    Letendre, Jo-Annie; Boysen, Søren

    2015-04-01

    The successful management of cranial vena cava syndrome with suspected secondary chylothorax due to mediastinal cryptococcal granuloma in a 4-year-old male domestic shorthair cat is described. Treatment included long-term antifungal medication, short-term corticosteroids, intermittent thoracocentesis, rutin, octreotide, and enalapril. PMID:25829555

  18. Bird's Nest Filter Causing Symptomatic Hydronephrosis Following Transmural Penetration of the Inferior Vena Cava

    SciTech Connect

    Stacey, C.S., E-mail: cheika@doctors.org.uk; Manhire, A.R.; Rose, D.H.; Bishop, M.C. [Nottingham CityHospital, Hucknall Road, Nottingham NG7 2UH, Department of Radiology (United Kingdom)

    2004-01-15

    We report a case of symptomatic hydronephrosis caused by transcaval penetration of a Bird's Nest filter. Perforation of the wall of the inferior vena cava (IVC) following insertion of a caval filter is a well-recognized complication. Whilst two cases of hydronephrosis have been described with Greenfield filters, no case involving a Bird's Nest filter has been reported previously.

  19. Klippel-Trenaunay syndrome with gastrointestinal bleeding, splenic hemangiomas and left inferior vena cava

    PubMed Central

    Wang, Zhen-Kai; Wang, Fang-Yu; Zhu, Ren-Min; Liu, Jiong

    2010-01-01

    Klippel-Trenaunay syndrome is a congenital vascular anomaly characterized by a triad of varicose veins, cutaneous capillary malformation, and hypertrophy of bone and (or) soft tissue. Gastrointestinal vascular malformations in Klippel-Trenaunay syndrome may present with gastrointestinal bleeding. The majority of patients with spleenic hemangiomatosis and/or left inferior vena cava are asymptomatic. We herein report a case admitted to the gastroenterology clinic with life-threatening hematochezia and symptomatic iron deficiency anemia. Due to the asymptomatic mild intermittent hematochezia, splenic hemangiomas and left inferior vena cava, the patient did not seek any help for gastrointestinal bleeding until his admittance to our department for evaluation of massive gastrointestinal bleeding. He was referred to angiography because of his serious pathogenetic condition and inefficiency of medical therapy. The method showed that hemostasis was successfully achieved in the hemorrhage site by embolism of corresponding vessels. Further endoscopy revealed vascular malformations starting from the stomach to the descending colon. On the other hand, computed tomography revealed splenic hemangiomas and left inferior vena cava. To the best of our knowledge, this is the first Klippel-Trenaunay syndrome case presenting with gastrointestinal bleeding, splenic hemangiomas and left inferior vena cava. The literature on the evaluation and management of this case is reviewed. PMID:20333801

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

    PubMed

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

    2015-03-01

    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

  1. Venous thromboembolic disease: the use of "optional" inferior vena cava filters.

    PubMed

    Venbrux, Anthony C; Ignacio, Elizabeth A; Sarin, Shawn N; Soltes, Amy P; Haskins, Noel C; Gagarin, Dmitri

    2008-03-01

    Approximately 140,000 to 200,000 patients die as a result of pulmonary embolism in the United States each year. If the diagnosis is made and therapy initiated, the mortality rate drops to 8%. Vena cava filters play a role in the management of patients with thromboembolic disease. Deployment of "optional" filters is changing practice paradigms. PMID:21326489

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

    Microsoft Academic Search

    Ziya Kirkali; Hein Van Poppel

    2007-01-01

    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).

  3. [Translumbar cannulation of vena cava inferior as an alternative method of vascular access for hemodialysis].

    PubMed

    Le?, Jaros?aw; Grzesiak, Joanna; ?abu?, Ma?gorzata; Kade, Grzegorz; Zelichowski, Grzegorz; Brzozowski, Krzysztof; Zukowski, Pawe?; Wa?kowicz, Zofia; Rybicki, Zbigniew

    2008-04-01

    The aim of our report is description of the first in Poland translumbar cannulation of vena cava inferior used as an alternative vascular access for hemodialysis in 62 years old patient without further access for hemodialysis and no access for peritoneal dialysis. PMID:18634367

  4. Hepatic allograft salvage with early doppler ultrasound diagnosis of acute vena cava thrombosis

    Microsoft Academic Search

    H. Bertani; A. D. Pinna; F. Di Benedetto; C. Quintini; C. Miller; E. Villa

    2004-01-01

    Postoperative inferior vena cava obstruction is an uncommon complication after liver transplantation. Outflow obstruction, if not rapidly corrected, can lead to graft failure and the patient’s death. We report a case in which Doppler ultrasound showed the thrombus inside the vessel, excluding extrahepatic causes of venous outflow obstruction, and permitted early surgical correction of the complication without graft loss.

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

    Microsoft Academic Search

    Massimo Porcellini; Paolo Stassano; Antonino Musumeci; Giancarlo Bracale

    2002-01-01

    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

  6. Retrieval of Cement Embolus from Inferior Vena Cava After Percutaneous Vertebroplasty

    SciTech Connect

    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

    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.

  7. Retrieval of Cement Embolus from Inferior Vena Cava After Percutaneous Vertebroplasty

    Microsoft Academic Search

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

    2009-01-01

    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.

  8. Clinical Sequelae of Thrombus in an Inferior Vena Cava Filter

    SciTech Connect

    Ahmad, Iftikhar; Yeddula, Kalpana; Wicky, Stephan; Kalva, Sanjeeva P., E-mail: skalva@partners.or [Massachusetts General Hospital and Harvard Medical School, Department of Radiology (United States)

    2010-04-15

    The purpose of this study was to assess the long-term clinical sequelae of inferior vena cava (IVC) filter thrombus and the effect of anticoagulation on filter thrombus. Of 1,718 patients who had IVC filters placed during 2001-2008, 598 (34.8%) had follow-up abdominal CT. Filter thrombus was seen in 111 of the 598 (18.6%). There were 44 men (39.6%). The mean age at filter placement was 64 years. The medical diseases included cancer in 64, trauma in 15, stroke in 12, and others in 20. The frequency of filter thrombus on CT and asymptomatic filter thrombus on CT was calculated. The frequency of pulmonary embolism (PE) in patients with filter thrombus was calculated. The frequency of thrombus progression or regression (on CT, available in 56) was calculated. The effect of anticoagulation on filter thrombus regression/progression was evaluated using the Fisher exact test by comparing the group of patients who received anticoagulants versus those who did not. A P-value of <0.05 was considered significant. The overall frequency of filter thrombus was 18.6%. Total occlusion of the IVC filter was seen in 12 of 598 (2%). The filter thrombus was asymptomatic in 110 (18.3%). Filter thrombus was detected after a median of 35 days (range, 0-2082) following filter placement. Thrombus extended above the filter in 4 (3.6%); IVC thrombus below the filter was seen in 35(31.5%). Thrombus in the filter occluded <25% of the filter volume in 58 (52.3%), 25-50% in 21 (18.9%), and 50-75% in 20 (18%). Total IVC occlusion was seen in 12 (10.8%). Eighty-three patients received anticoagulation. Sixteen patients developed symptoms of PE. PE was confirmed on CT in 3 of 15 (2.7%). On follow-up, filter thrombus regressed completely in 19 (33.9%) after a median of 6 months. Filter thrombus decreased in size in 13 (23.2%) and it progressed without IVC occlusion in 7 (12.6%). In one (1.7%), filter thrombus progressed to IVC occlusion. Filter thrombus remained stable in 16 (28.6%). There was no significant difference in thrombus regression or progression rates whether or not the patients received anticoagulation for filter thrombus. In conclusion, asymptomatic thrombus in the filter is common and it rarely progresses to complete caval occlusion. Anticoagulation has little effect on the resolution of filter thrombosis and future occurrence of PE.

  9. Lake Superior, Duluth, MN

    NASA Technical Reports Server (NTRS)

    1973-01-01

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

  10. Three-Dimensional Rotational Angiography of the Inferior Vena Cava as an Adjunct to Inferior Vena Cava Filter Retrieval

    SciTech Connect

    Bozlar, Ugur; Edmunds, J. Stewart; Turba, Ulku C.; Hartwell, Gary D.; Housseini, Ahmed M.; Hagspiel, Klaus D., E-mail: kdh2n@virginia.ed [University of Virginia Health System, Department of Radiology (United States)

    2009-01-15

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

  11. You see what you know … gas bubbles in the inferior vena cava, an unusual presentation of necrotizing soft tissue infection.

    PubMed

    Winter, Thomas C; Rudolf, Lou; Sommers, Daniel N

    2015-06-01

    Gas detected within the systemic circulation as an unexpected finding is a very rare phenomenon. A case of multiple bubbles within the inferior vena cava detected incidentally during a sonogram requested to assess for portal vein thrombosis is presented. These were eventually determined to be sequelae of a fatal, clinically silent necrotizing soft tissue infection. The differential diagnosis for gas within the inferior vena cava is reviewed, and teaching points that may help future patients are presented. PMID:25364965

  12. Antiproliferative activity of sulfated polysaccharide isolated from an enzymatic digest of Ecklonia cava on the U-937 cell line

    Microsoft Academic Search

    Yasantha Athukorala; Gin Nae Ahn; Young-Heun Jee; Gi-Young Kim; Soo-Hyun Kim; Jin-Hwan Ha; Jung-Sook Kang; Ki-Wan Lee; You-Jin Jeon

    2009-01-01

    A sulfated polysaccharide purified from a brown alga Ecklonia cava, having high anticoagulant activity was investigated for its antiproliferative effect on murine colon carcinoma (CT-26),\\u000a human leukemic monocyte lymphoma (U-937), human promyelocytic leukemia (HL-60), and mouse melanoma (B-16) cell lines. The\\u000a sulfated polysaccharide isolated and purified from an enzymatic extract of E. cava had a good selective tumor cell growth

  13. Canal Superior Online Pas: Portugal

    E-print Network

    Instituto de Sistemas e Robotica

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

  14. Canal Superior Online Pas: Portugal

    E-print Network

    Instituto de Sistemas e Robotica

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

  15. Canal Superior Online Pas: Portugal

    E-print Network

    Instituto de Sistemas e Robotica

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

  16. Canal Superior Online Pas: Portugal

    E-print Network

    Instituto de Sistemas e Robotica

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

  17. Canal Superior Online Pas: Portugal

    E-print Network

    Instituto de Sistemas e Robotica

    Canal Superior Online País: Portugal Period.: Diária Âmbito: Online Pag.: 1 de 3ID: 45533397 07-01-2013 | Canal Superior Informação Online PROGRAMAS INFORMAÇÃO AGENDA PESQUISA LOGIN/REGISTO EMISSÃO INFORMAÇÃO:56 LUÍSREBELO: «AS MANIFESTAÇÕESTÊM TIDO POUCO OU NENHUM RESULTADO» Numa mini-entrevista ao Canal Superior, com

  18. Statistics of superior records

    NASA Astrophysics Data System (ADS)

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

    2013-08-01

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

  19. [MR angiography of pelvic veins and the inferior vena cava using 0.5 tesla].

    PubMed

    Haubold-Reuter, B; Nicolas, V

    1994-10-01

    The pelvic veins and/or the inferior vena cava were examined in 15 patients with pelvic vein thrombosis or retroperitoneal tumours, using phlebography or cavography and MR angiography. The latter was carried out using 0.5 Tesla with an inflow technique TR/TE 30/8 ms, flip angle 70 degrees). 3-D projection angiograms were obtained from the 2-D angiograms in the coronary plane. Image quality was generally satisfactory and the veins up to the internal iliac could be demonstrated in all cases; below this, the examination was unreliable. Comparison of the methods with reference to information of therapeutic relevance has shown that in two-thirds of all examinations (8/13) MR angiography and phlebography were of equal diagnostic value. In the presence of a renal cell carcinoma, MR angiography was unable to distinguish between thrombosis and infiltration of the vena cava. PMID:7948977

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

    PubMed

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

    2013-04-01

    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

  1. Nierenzellkarzinom mit suprahepatischem V. -cava-Befall (Stadium III und IV nach Staehler)

    Microsoft Academic Search

    J. Roigas; A. Wille; K. Winter; S. Deger; I. Türk; R. I. Rückert; J. Bohm; D. Schnorr

    2003-01-01

    Zusammenfassung Die operative Behandlung von Patienten mit Nierenzellkarzinomen (NZK) und suprahepatisch-infradiaphragmalem oder supradiaphragmalem Vena-cava-Befall (Stadium III und IV nach Staehler) stellt nach wie vor eine interdisziplinäre Herausforderung dar. Die potenziell hohe Komplikationsrate und der enorme operationstechnische Aufwand müssen individuell mit dem zu erwartenden Nutzen für den Patienten in Einklang gebracht werden. In dieser Studie haben wir die operativen Ergebnisse von

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

    Microsoft Academic Search

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

    1998-01-01

    .   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

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

    Microsoft Academic Search

    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

    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

  4. Retrieval of Cement Embolus from Inferior Vena Cava After Percutaneous Vertebroplasty

    Microsoft Academic Search

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

    2009-01-01

    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.

  5. Technical Error During Deployment Leads to Vena Cava Filter Migration and Massive Pulmonary Embolism

    SciTech Connect

    Fotiadis, Nikolas I., E-mail: fotiadis.nicholas@gmail.com; Sabharwal, Tarun; Dourado, Renato [Guy's and St. Thomas' Hospital, Interventional Radiology Department (United Kingdom); Fikrat, Shabbo [Guy's and St. Thomas' Hospital, Department of Cardiothoracic Surgery (United Kingdom); Adam, Andreas [Guy's and St. Thomas' Hospital, Interventional Radiology Department (United Kingdom)

    2008-07-15

    The Guenther Tulip vena cava filter is a safe, effective, well-established device for pulmonary embolism prophylaxis. We report a patient in whom there was migration of the filter to the right atrium, 2 weeks after insertion, caused by a technical error during deployment. An attempt to retrieve the filter percutaneously failed, necessitating removal at open-heart surgery. The potential causes of migration are described and the lessons learned from this unusual case are outlined.

  6. Guenther Tulip Filter Retrieval from a Left-sided Inferior Vena Cava

    SciTech Connect

    Brountzos, Elias N.; Kaufman, John A., E-mail: kaufmajo@ohsu.edu; Lakin, Paul L. [Oregon Health Sciences University, 3181 SW Sam Jackson Park Rd., L342, Portland, OR, 97201-3098, Dotter Interventional Institute (United States)

    2004-01-15

    Optional (retrievable) inferior cava filters (IVC) may have advantages over permanent filters in a certain subset of patients, especially in view of recent concerns about the long-term thrombotic complications of the latter. Retrieval of the Guenther Tulip Filter (GTF), an optional filter, has been reported in a total of 76 patients. We present the first description of GTF retrieval from a left-sided IVC using the right internal jugular approach.

  7. Complications in right-sided paraaortic lymphadenectomy: ventral tributaries of the inferior vena cava

    PubMed Central

    Turyna, Radovan; Kachlik, David; Kucera, Eduard; Kujal, Petr; Feyereisl, Jaroslav; Baca, Vaclav

    2013-01-01

    The purpose of this study was to describe the distribution and structure of ventral tributaries leading into the inferior vena cava where right-sided paraaortic lymphadenectomy is performed. The study examined 21 retroperitoneal specimens by graphic reconstruction, statistical evaluation, and histological examination of ventral tributaries (VTs). Seventy VTs were identified. The average number per specimen was 3.33. There were 20, 40, and 40% of VTs found in Levels I, II, and III, respectively. During the preparation, we observed an unusual arrangement of the IVC wall, into which VTs were led through a preformed sleeve-like channel and anchored near the lumen. This finding is a key mechanism that explains the ease with which VTs are extracted during surgery. Knowledge of the distribution and histological structure of VTs allows proper orientation of the retroperitoneal area of the front wall of inferior vena cava, which is essential for uncomplicated right-sided paraaortic lymphadenectomy. The histological structure of the VT ostium within the wall of the inferior vena cava explains why injury is easy during the procedure. PMID:23692119

  8. Comparison of superior vena caval and inferior vena caval access using a radioisotope technique during normal perfusion and cardiopulmonary resuscitation

    SciTech Connect

    Dalsey, W.C.; Barsan, W.G.; Joyce, S.M.; Hedges, J.R.; Lukes, S.J.; Doan, L.A.

    1984-10-01

    Recent studies of thoracic pressure changes during external cardiopulmonary resuscitation (CPR) suggest that there may be a significant difference in the rate of delivery of intravenous drugs when they are administered through the extrathoracic inferior vena cava (IVC) rather than the intrathoracic superior vena cava (SVC). Comparison of delivery of a radionuclide given using superior and inferior vena caval access sites was made during normal blood flow and during CPR. Mean times from injection to peak emission count in each ventricle were determined. There were no significant differences between mean peak times for SVC or IVC routes during normal flow or CPR. When peak times were corrected for variations in cardiac output, there were no significant differences between IVC and SVC peak times during normal flow. During CPR, however, mean left ventricular peak time, when corrected for cardiac output, was significantly shorter (P less than .05) when the SVC route was used. The mean time for the counts to reach half the ventricular peak was statistically shorter (P less than .05) in both ventricles with the SVC route during the low flow of CPR. This suggests that during CPR, increased drug dispersion may occur when drugs are infused by the IVC route and thus may modify the anticipated effect of the drug bolus. These results suggest that during CPR, both the cardiac output and the choice of venous access are important variables for drug delivery.

  9. La Facultad de Estudios Superiores (FES) Aragn busca incentivar la elaboracin de textos analticos y originales entre

    E-print Network

    Islas, León

    Objetivo La Facultad de Estudios Superiores (FES) Aragón busca incentivar la elaboración de textos ensayos deberán presentarse en las instalaciones de la Facultad de Estudios Superiores Aragón o ser en días hábiles de 10:00 a 15:00 horas y de 17:00 a 20:00 horas. Para efectos de registro, en caso de

  10. Vena cava filters in hospitalised patients with chronic obstructive pulmonary disease and pulmonary embolism.

    PubMed

    Stein, P D; Matta, F

    2013-05-01

    In view of the high case fatality rates of patients with chronic obstructive pulmonary disease (COPD) who have pulmonary embolism (PE) we speculated that such patients might benefit from vena cava filters. To test this hypothesis we assessed the database of the Nationwide Inpatient Sample. From 1998-2009, 440,370 patients were hospitalised with PE and COPD who were not in shock or ventilator-dependent and did not receive thrombolytic therapy or pulmonary embolectomy. In-hospital all-cause case fatality rate among those with filters was 5,890 of 68,800 (8.6%) (95% confidence interval [CI] = 8.4-8.8) compared with 38,960 of 371,570 (10.5%) (95% CI = 10.4-10.6) (p<0.0001) who did not receive filters. Case fatality rate was age-dependent. Only those who were older than aged 50 years had a lower in-hospital all-cause case fatality rate with filters. Among such patients, absolute risk reduction was 2.1% (95% CI = 1.9-2.3). The greatest reduction of case fatality rate with vena cava filters was shown in patients >aged 80 years, 11,720 of 81,600 (14.4%) compared with 1,570 of 17,220 (9.1%) (p<0.0001). In conclusion, a somewhat lower in-hospital all-cause case fatality rate was shown with vena filters in stable patients with PE >aged 50 years who also had COPD. The benefit was greatest in elderly patients. The benefit in terms of a decreased case fatality rate would seem to outweigh the risks of vena cava filters in such patients. PMID:23467701

  11. Acute Pancreatitis Complicated by Massive Inferior Vena Cava and Right Atrial Thrombosis: A Case Report.

    PubMed

    Lee, Kangeui; Ko, Jung-In; Park, Taejin

    2015-07-01

    Venous thrombosis is a relatively common complication of acute pancreatitis. A 58-year-old man came to our emergency department with abdominal pain. Pancreatitis complicated with a huge thrombosis through inferior vena cava (IVC) to right atrium and left renal vein was diagnosed. Gabexate and enoxaparin were administered for pancreatitis and thrombosis. Surgical removal of thrombosis was considered but was not possible because of poor general condition. Despite conservative management, the patient expired. We believe this is the first case of pancreatitis complicated by right atrial thrombosis. PMID:25765632

  12. Inferior vena cava collapsibility to guide fluid removal in slow continuous ultrafiltration: a pilot study

    Microsoft Academic Search

    Giovanna Guiotto; Mario Masarone; Fiorella Paladino; Enrico Ruggiero; Sean Scott; Sossio Verde; Fernando Schiraldi

    2010-01-01

    Objective  To investigate whether ultrasound determination of the inferior vena cava diameter (IVCD) and its collapsibility index (IVCCI)\\u000a could be used to optimize the fluid removal rate while avoiding hypotension during slow continuous ultrafiltration (SCUF).\\u000a \\u000a \\u000a \\u000a \\u000a Methods  Twenty-four consecutive patients [13 men and 11 women, mean age 72 ± 5 years; New York Heart Association (NYHA) functional\\u000a classes III–IV] with acute decompensated heart failure (ADHF) and

  13. Animal Experience in the Gunther Tulip Retrievable InferiorVena Cava Filter

    Microsoft Academic Search

    M. A. de Gregorio; M. J. Gimeno; R. Tobio; F. Lostale; A. Mainar; J. M. Beltran; B. Madariaga; E. R. Alfonso; J. Medrano; A. Viloria

    2001-01-01

      Purpose: To assess the retrievability of\\u000a the Gunther Tulip temporary inferior vena cava filter from a\\u000a technical viewpoint, and consider the histopathologic changes that\\u000a occur at the anchoring site of the filter prongs to the vein\\u000a endothelium in Landrace pigs.\\u000a Methods: Twenty-two\\u000a Gunther Tulip retrievable filters were inserted in 22\\u000a experimental Landrace pigs via the jugular vein. Device implantation\\u000a time

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

    SciTech Connect

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

    2010-10-15

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

  15. Medical Technology for Superior Patient

    E-print Network

    Hayden, Nancy J.

    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

  16. Modeling Flow Past a TrapEase Inferior Vena Cava Filter

    NASA Astrophysics Data System (ADS)

    Singer, Michael; Henshaw, William; Wang, Stephen

    2008-11-01

    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.

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

    PubMed Central

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

    2011-01-01

    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

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

    PubMed Central

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

    2009-01-01

    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

  19. Retrievable Vena Cava Filters in Major Trauma Patients: Prevalence of Thrombus Within the Filter

    SciTech Connect

    Mahrer, Arie; Zippel, Douglas; Garniek, Alexander; Golan, Gil; Bensaid, Paul; Simon, Daniel; Rimon, Uri, E-mail: rimonu@sheba.health.gov.i [Tel-Aviv University, Sackler School of Medicine (Israel)

    2008-07-15

    The purpose of this study was to report the prevalence of thrombus within a retrievable vena cava filter inserted prophylactically in major trauma patients referred for filter extraction. Between November 2002 and August 2005, 80 retrievable inferior vena cava filters (68 Optease and 12 Gunther-Tulip) were inserted into critically injured trauma patients (mean injury severity score 33.5). The filters were inserted within 1 to 6 (mean 2) days of injury. Thirty-seven patients were referred for filter removal (32 with Optease and 5 with Gunther-Tulip). The indwelling time was 7 to 22 (mean 13) days. All patients underwent inferior vena cavography prior to filter removal. There were no insertion-related complications and all filters were successfully deployed. Forty-three (54%) of the 80 patients were not referred for filter removal, as these patients continued to have contraindications to anticoagulation. Thirty-seven patients (46%) were referred for filter removal. In eight of them (22%) a large thrombus was seen within the filters and they were left in place, all with the Optease device. The other 29 filters (36%) were removed uneventfully.We conclude that the relatively high prevalence of intrafilter thrombi with the Optease filter may be explained by either spontaneous thrombus formation or captured emboli.

  20. Superior labrum anterior to posterior lesions and the superior labrum.

    PubMed

    Rowbotham, Emma L; Grainger, Andrew J

    2015-07-01

    The fibrocartilaginous glenoid labrum contributes to shoulder stability and provides attachment for the long head of biceps tendon and the glenohumeral ligaments. The superior site of attachment of the long head of biceps (biceps anchor) represents a site of injury to the superior labrum where tearing may extend into the biceps tendon as well as anterior and/or posterior to the biceps anchor. Such tears are known as superior labrum anterior and posterior (SLAP) tears and are a cause of both shoulder instability and pain. SLAP tears are frequently seen in those undertaking repetitive frequent overarm activity such as throwing athletes and swimmers. This article reviews the mechanisms and types of SLAP tears and their imaging appearances. It also discusses associated injuries and pitfalls in diagnosing these injuries. PMID:26021587

  1. Preparative isolation and purification of phlorotannins from Ecklonia cava using centrifugal partition chromatography by one-step.

    PubMed

    Lee, Ji-Hyeok; Ko, Ju-Young; Oh, Jae-Young; Kim, Chul-Young; Lee, Hee-Ju; Kim, Jaeil; Jeon, You-Jin

    2014-09-01

    Various bioactive phlorotannins of Ecklonia cava (e.g., dieckol, eckol, 6,6-bieckol, phloroglucinol, phloroeckol, and phlorofucofuroeckol-A) are reported. However, their isolation and purification are not easy. Centrifugal partition chromatography (CPC) can be used to efficiently purify the various bioactive-compounds efficiently from E. cava. Phlorotannins are successfully isolated from the ethyl acetate (EtOAc) fraction of E. cava by CPC with a two-phase solvent system comprising n-hexane:EtOAc:methanol:water (2:7:3:7, v/v) solution. The dieckol (fraction I, 40.2mg), phlorofucofuroeckol-A (fraction III, 31.1mg), and fraction II (34.1mg) with 2,7-phloroglucinol-6,6-bieckol and pyrogallol-phloroglucinol-6,6-bieckol are isolated from the crude extract (500 mg) by a one-step CPC system. The purities of the isolated dieckol and phlorofucofuroeckol-A are ?90% according to high performance liquid chromatography (HPLC) and electrospray ionization multi stage tandem mass spectrometry analyses. The purified 2,7-phloroglucinol-6,6-bieckol and pyrogallol-phloroglucinol-6,6-bieckol are collected from fraction II by recycle-HPLC. Thus, the CPC system is useful for easy and simple isolation of phlorotannins from E. cava. PMID:24731366

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

    PubMed

    Yuan, S M

    2014-09-01

    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

  3. Superior Services realigning to succeed

    SciTech Connect

    Aquino, J.T.

    1997-01-01

    Superior Services, Inc. (West Allis, Wis.) has been through amalgamation, realignment, a public offering, and a spate of acquisitions to become a $100-million company. The quest for the ``Superior company`` is barely five years old. It started with a large amalgamation of local entities and then went through a ``realignment`` in 1994 on the way to its goal of being a leading 21st-century provider of solid waste services. According to the company`s March 8, 1996, prospectus, as part of the realignment, Superior had realized $8.4 million of proceeds from the sale of underutilized assets, non-core businesses, and unprofitable solid waste operations; reduced its total debt by $20.9 million; and downsized its workforce by 20%. Superior has made 29 acquisitions since its initial amalgamation; 11 since going public in March. At press time, it had 22 solid waste collection operations, 10 recycling facilities, seven transfer stations, and 850 employees. Superior operates 20 recycling facilities as part of its collection and transfer operations. In November 1994, it opened a paper recycling facility in Menomonee Falls, Wis.

  4. OptEase and TrapEase Vena Cava Filters: A Single-Center Experience in 258 Patients

    SciTech Connect

    Onat, Levent, E-mail: levonat2@yahoo.com; Ganiyusufoglu, Ali Kursat; Mutlu, Ayhan [Florence Nightingale Hospital, Department of Radiology (Turkey); Sirvanci, Mustafa; Duran, Cihan [Bilim University, Department of Radiology, Faculty of Medicine (Turkey); Ulusoy, Onur Levent [Florence Nightingale Hospital, Department of Radiology (Turkey); Hamzaoglu, Azmi [Florence Nightingale Hospital, Department of Orthopedic Surgery (Turkey)

    2009-09-15

    We aimed to evaluate the efficacy and safety of the OptEase and TrapEase (both from Cordis, Roden, Netherlands) vena cava filters in the prevention of pulmonary embolism (PE). Between May 2004 and December 2008, OptEase (permanent/retrievable; n = 228) or TrapEase (permanent; n = 30) vena cava filters were placed in 258 patients (160 female and 98 male; mean age 62 years [range 22 to 97]). Indications were as follows: prophylaxis for PE (n = 239), contraindication for anticoagulation in the presence of PE or DVT (n = 10), and development of PE or DVT despite anticoagulation (n = 9). Medical records were retrospectively reviewed for indications, clinical results, and procedure-related complications during placement and retrieval. Clinical PE did not develop in any of the patients. However, radiologic signs of segmental PE were seen in 6 of 66 patients with follow-up imaging data. Migration or fracture of the filter or cava perforation was not seen in any of the patients. Except for a single case of asymptomatic total cava thrombosis, no thrombotic occlusion was observed. One hundred forty-one patients were scheduled to undergo filter removal; however, 17 of them were not suitable for such based on venography evaluation. Removal was attempted in 124 patients and was successful in 115 of these (mean duration of retention 11 days [range 4 to 23]). Nine filters could not be removed. Permanent/retrievable vena cava filters are safe and effective devices for PE prophylaxis and for the management of venous thromboembolism by providing the option to be left in place.

  5. Klippel-Trenaunay and Sturge-Weber syndromes with renal hemangioma and double inferior vena cava.

    PubMed

    Schofield, D; Zaatari, G S; Gay, B B

    1986-08-01

    We describe a 3 1/2-year-old boy with the Klippel-Trenaunay and Sturge-Weber syndromes. The child had congenital superficial capillary hemangiomas, congenital glaucoma and mild hydrocephalus. During the first year of life he experienced intermittent hematuria. When he was 3 years old he presented with seizures and left hemihypertrophy first was noted. Several months later radiological examination of a large abdominal mass demonstrated its origin to be in the right kidney. Radical nephrectomy documented the presence of renal hemangioma with complicating perirenal hematoma. A double inferior vena cava was another unexpected surgical finding that complicated the course of this patient. All of these unusual features in these rare syndromes with their clinical, pathogenetic and therapeutic implications are discussed. The differential diagnosis of renal masses in these syndromes also is presented. PMID:3016342

  6. Renal Failure Secondary to Thrombotic Complications of Suprarenal Inferior Vena Cava Filter in Cancer Patients

    SciTech Connect

    Marcy, Pierre-Yves; Magne, Nicolas; Frenay, Marc; Bruneton, Jean-Noel [Division of Vascular and Interventional Radiology, Centre Antoine-Lacassagne, 33, avenue de Valombrose, F-06189 Nice, Cedex 2 (France)

    2001-07-15

    Purpose: To evaluate renal function before and after suprarenal inferior vena cava (IVC) filter placement.Methods: We describe, in a personal series of 13 consecutive cases (all of them stage IV cancer patients, one LGM filter, one Antheor filter, 11 Greenfield filters) in our institution, two cases of fatal renal vein thrombosis after placement of a suprarenal filter. Evaluation of renal function was based on serum urea (in mmol/L; normal 3.30-6.60), serum creatinine (in {mu}mol/L; normal <115.1), and calculation of serum creatinine clearance. Results and conclusion: This study suggests that in advanced-stage cancer patients who have a single functional kidney, renal functional insufficiency, or previous renal vein thrombosis, IVC filter placement above the renal veins may not be appropriate. Suprarenal filter placement should be performed only after analysis of predicted survival, after detailed discussions with the patient, and most importantly after renal function evaluation.

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

    PubMed

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

    2015-08-01

    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

  8. Complete Surgical Resection of a Leiomyosarcoma Arising from the Inferior Vena Cava

    PubMed Central

    Sonoda, Hirofumi; Minamimura, Keisuke; Endo, Yuhei; Irie, Shoichi; Hirata, Toru; Kobayashi, Takashi; Mafune, Ken-ichi; Mori, Masaya

    2015-01-01

    A 76-year-old Japanese man was referred to our hospital with chief complaint of right hypochondoralgia. Abdominal ultrasound showed a retroperitoneal tumor in the suprarenal region of the right kidney. Computed tomography revealed an enhanced lobular tumor with irregular, circumscribed, and indistinct border. Ultrasound-guided biopsy was performed. The tumor consisted of spindle-shaped cells with a giant nucleus and multinuclear cells. The diagnosis was leiomyosarcoma by immunohistochemical staining. The patient underwent surgery accessed by a right eighth intercostal thoracoabdominal incision. The tumor was completely resected, accompanied by removal of the posterosuperior segment of the right hepatic lobe, right adrenal gland, and a portion of the inferior vena cava (IVC). The histopathologic diagnosis was leiomyosarcoma arising from the IVC. We present a rare case of a successfully managed leiomyosarcoma of the IVC. This case suggests the importance of curative surgical resection of the tumor due to low efficacy of adjuvant chemotherapy for leiomyosarcoma. PMID:26167180

  9. Extensive Thrombosis of the Inferior Vena Cava and Left Renal Vein in a Neonate

    PubMed Central

    Kdous, Moez; Khlifi, Oussema; Brahem, Marwene; Khrouf, Mohamed; Amari, Sarah; Ferchiou, Monia; Zhioua, Fethi

    2015-01-01

    Antenatal renal vein thrombosis is a rarely described diagnostic finding, with variable consequences on kidney function. We present the case of an affected fetus, born at 35-week gestation, with intrauterine oligohydramnios and two small kidneys. A renal ultrasound carried out after birth confirmed the presence of prenatal abnormalities. Renal vein thrombosis was not diagnosed at the time. The baby died 20 days later of kidney failure, metabolic acidosis, and polypnea with severe hypotrophy. Autopsy revealed atrophied kidneys and adrenal glands. The vena cava had thrombosis occupying most of its length. The right renal vein was normal, while the left renal vein was threadlike and not permeable. Histologically, there was necrosis of the left adrenal gland with asymmetrical bilateral renal impairment and signs of ischemic and hemorrhagic lesions. A review of thrombophilia was carried out and a heterozygous mutation in Factor V was found in both the mother and the child.

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

    SciTech Connect

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

    2008-03-15

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

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

    PubMed Central

    Jain, Ankur

    2014-01-01

    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

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

    PubMed

    Kuo, William T; Robertson, Scott W

    2015-01-01

    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

  13. Ultrasound-Accelerated, Catheter-Directed Thrombolysis for Inferior Vena Cava Thrombosis After an Orthotopic Liver Transplant

    PubMed Central

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

    2015-01-01

    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

  14. [Anomalous connection of inferior vena cava to left atrium: infrequent entity that can be a diagnosis and surgical challenge].

    PubMed

    Archundia García, A; Gómez Alvarez, E; Ixcamparij Rosales, C; Blanco Canto, M; Hernández Ruiz, M A

    2000-01-01

    This is the diagnostic experiences as well as the surgical mode of treatment used in a 31 years old women suffering diversion of the inferior vena cava into the left atrium associated with atrial septal defect. The patient had been previously studied and operated thrice under conventional circumstances at different institutions in order to solve the septal defect. The hemodynamic solution had not been reached due to a missing pathological definition. The cineangiogram through the saphenous vein specified the left atrium form the inferior vena cava. Some considerations are made on the surgical methods used for the fourth operation, and in regard of the fact that the patient refused blood transfusion because of religious convictions (Jehova Witness). PMID:11534101

  15. Blocking of the Hepatic Vein Outflow by Neointima Covering a Wallstent Across a Membranous Stenosis of the Inferior Vena Cava

    SciTech Connect

    Dutta, Usha; Garg, Pramod K. [Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi 110029 (India); Agarwal, Rajeev [Department of Cardiology, All India Institute of Medical Sciences, New Delhi 110029 (India); Gupta, S. Dutta [Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029 (India); Prasad, G. A. [Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi 110029 (India); Kaul, Upendra [Department of Cardiology, All India Institute of Medical Sciences, New Delhi 110029 (India); Tandon, Rakesh K. [Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi 110029 (India)

    1999-11-15

    A 31-year-old man presented with idiopathic membranous obstruction of the suprahepatic inferior vena cava (IVC) and was treated by balloon dilation and placement of a Wallstent. The patient improved markedly. However, he developed obstruction of the hepatic vein outflow secondary to neointima formation over the stent that covered the hepatic vein ostia. The patient died of liver failure and septicemia. We believe that this is the first report of such a serious complication.

  16. CT demonstration of extension of renal angiomyolipoma into the inferior vena cava in a patient with tuberous sclerosis

    Microsoft Academic Search

    F. Camfifiez; J. Lafuente; R. Robledo; A. Echenagusia; M. Pérez; G. Simo; F. Gfilvez

    1988-01-01

    The authors present a case of tumor thrombus in the inferior vena cava produced by angiomyolipoma in a young woman with tuberous\\u000a sclerosis. Diagnosis was made by computed tomography (CT) by measuring the attenuation values of the tumor thrombus. The values\\u000a obtained were characteristic of fat, demonstrating that tumoral invasion was the cause of the thrombus. To our knowledge,\\u000a this

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

    SciTech Connect

    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

    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.

  18. Intracellular free calcium concentration \\/ force relationship in rabbit inferior vena cava activated by norepinephrine and high K +

    Microsoft Academic Search

    Raouf A. Khalil; Cornelis van Breemen

    1990-01-01

    The changes in isometric force and the underlying fluctuations in intracellular free calcium concentration ([Ca2+]i) were monitored simultaneously in thin sheets of rabbit inferior vena cava loaded with the fluorescent Ca2+ indicator fura-2. In resting tissues bathed in physiological saline solution, the estimated [Ca2+]i was approximately 105 nM. The a-adrenergic agonist norepinephrine (10 µM) caused an initial rise in [Ca2+]i

  19. Universidad Autnoma de Madrid Escuela Politcnica Superior

    E-print Network

    Bellogin, Alejandro

    Universidad Autónoma de Madrid Escuela Politécnica Superior Departamento de Ingeniería Informática Gutiérrez Madrid, October 2012 #12;#12;PhD thesis title: Recommender System Performance Evaluation de Ingeniería Informática Escuela Politécnica Superior Universidad Autónoma de Madrid, Spain

  20. First Magnetic Resonance Imaging-Guided Aortic Stenting and Cava Filter Placement Using a Polyetheretherketone-Based Magnetic Resonance Imaging-Compatible Guidewire in Swine: Proof of Concept

    SciTech Connect

    Kos, Sebastian, E-mail: skos@gmx.d [University Hospital Basel, Institute of Radiology (Switzerland); Huegli, Rolf [Kantonsspital Bruderholz, Institute of Radiology (Switzerland); Hofmann, Eugen [Biotronik, Vascular Intervention (Switzerland); Quick, Harald H.; Kuehl, Hilmar [University of Duisburg-Essen, Department of Diagnostic and Interventional Radiology and Neuroradiology (Germany); Aker, Stephanie [University of Duisburg-Essen, Institute of Pathophysiology (Germany); Kaiser, Gernot M. [University of Duisburg-Essen, Department of General, Visceral, and Transplantation Surgery (Germany); Borm, Paul J. A. [MagnaMedics GmbH (Germany); Jacob, Augustinus L.; Bilecen, Deniz [University Hospital Basel, Institute of Radiology (Switzerland)

    2009-05-15

    The purpose of this study was to demonstrate feasibility of percutaneous transluminal aortic stenting and cava filter placement under magnetic resonance imaging (MRI) guidance exclusively using a polyetheretherketone (PEEK)-based MRI-compatible guidewire. Percutaneous transluminal aortic stenting and cava filter placement were performed in 3 domestic swine. Procedures were performed under MRI-guidance in an open-bore 1.5-T scanner. The applied 0.035-inch guidewire has a PEEK core reinforced by fibres, floppy tip, hydrophilic coating, and paramagnetic markings for passive visualization. Through an 11F sheath, the guidewire was advanced into the abdominal (swine 1) or thoracic aorta (swine 2), and the stents were deployed. The guidewire was advanced into the inferior vena cava (swine 3), and the cava filter was deployed. Postmortem autopsy was performed. Procedural success, guidewire visibility, pushability, and stent support were qualitatively assessed by consensus. Procedure times were documented. Guidewire guidance into the abdominal and thoracic aortas and the inferior vena cava was successful. Stent deployments were successful in the abdominal (swine 1) and thoracic (swine 2) segments of the descending aorta. Cava filter positioning and deployment was successful. Autopsy documented good stent and filter positioning. Guidewire visibility through applied markers was rated acceptable for aortic stenting and good for venous filter placement. Steerability, pushability, and device support were good. The PEEK-based guidewire allows either percutaneous MRI-guided aortic stenting in the thoracic and abdominal segments of the descending aorta and filter placement in the inferior vena cava with acceptable to good device visibility and offers good steerability, pushability, and device support.

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

    PubMed

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

    2014-08-01

    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

  2. Unusual presentation of testicular cancer with tumor thrombus extending to the inferior vena cava.

    PubMed

    Dusaud, Marie; Bayoud, Younes; Desfemmes, François-Régis; Molimard, Benoît; Durand, Xavier

    2015-01-01

    A 45-year-old man with a left testis tumor with a 25?mm para-aortic lymph node swelling, multiple bilateral pulmonary metastases, bilateral pulmonary embolism, and inferior vena cava (IVC) thrombus underwent a radical orchidectomy in our institution. The thrombus extended from the left gonadal vein to the left renal vein to the IVC. The fluorine-18 fluorodeoxyglucose (f-FDG) positron emission tomography (PET) computerized tomography (CT) demonstrated a hypermetabolic focus in the retroperitoneum and in the IVC thrombus. Before orchidectomy only lactate dehydrogenase (LDH) was high but all the serum tumor markers increased postoperatively. The tumor was staged pT1N2M1aS1, which was an intermediate prognosis, based on the International Germ Cell Cancer Collaborative Group consensus (IGCCCG). After 4 courses of bleomycin, etoposide, and cisplatin (BEP) chemotherapy the patient's tumor markers normalized and the thrombus disappeared. There was only one residual retroperitoneal lymph node M1. Retroperitoneal lymph node dissection was performed. The pathological examination revealed only necrotic tissues. The patient has been disease-free since surgery. PMID:26000192

  3. Congenital Agenesis of Inferior Vena Cava: A Rare Cause of Unprovoked Deep Venous Thrombosis.

    PubMed

    Parsa, Pouria; Lane, John S; Barleben, Andrew R; Owens, Erik L; Bandyk, Dennis

    2015-07-01

    Congenital anomalies of the inferior vena cava (IVC), although rare, are a risk factor for lower limb deep venous thrombosis (DVT). A 19-year-old male presented with a left flank and groin pain caused by iliofemoral venous thrombosis. Vascular imaging by computed tomography (CT) scanning and venography demonstrated agenesis of the IVC. Catheter-directed thrombolysis via a popliteal vein was attempted but did not alter the patency of the common femoral vein outflow collaterals into the retroperitoneal azygous venous system. The patient was anticoagulated using systemic heparin infusion and clinical symptoms resolved within 5 days. He was transitioned to oral Coumadin anticoagulation, and follow-up venous duplex testing demonstrated no infrainguinal DVT and phasic venous flow with respiration in the femoral vein indicating patent collateral veins. Anomalies of the IVC are present in 0.3-0.5% of otherwise healthy individuals. Agenesis of the IVC has an incidence of 0.0005-1% in the general population but is found in almost 5% of patients <30 years of age with unprovoked lower limb DVT. In adults, IVC agenesis anomaly can cause diagnostic problems in the paravertebral area because of the tumor-like appearance of the azygous venous collaterals on noncontrast CT imaging. In young adults presenting with unprovoked lower limb DVT, the presence of an IVC anomaly should be considered and evaluated for by venous duplex testing and if necessary CT venography. PMID:25747887

  4. Hydrodynamic gene delivery to the pig liver via an isolated segment of the inferior vena cava.

    PubMed

    Fabre, J W; Grehan, A; Whitehorne, M; Sawyer, G J; Dong, X; Salehi, S; Eckley, L; Zhang, X; Seddon, M; Shah, A M; Davenport, M; Rela, M

    2008-03-01

    Hydrodynamic gene delivery is an attractive option for non-viral liver gene therapy, but requires evaluation of efficacy, safety and clinically applicable techniques in large animal models. We have evaluated retrograde delivery of DNA to the whole liver via the isolated segment of inferior vena cava (IVC) draining the hepatic veins. Pigs (18-20 kg weight) were given the pGL3 plasmid via two programmable syringe pumps in parallel. Volumes corresponding to 2% of body weight (360-400 ml) were delivered at 100 ml s(-1) via a Y connector. The IVC segment pressure, portal venous pressure, arterial pressure, electrocardiogram (ECG) and pulse were monitored. Concurrent studies were performed in rats for interspecies comparisons. The hydrodynamic procedure generated intrahepatic vascular pressures of 101-126 mm Hg, which is approximately 4 times higher than in rodents, but levels of gene delivery were approximately 200-fold lower. Suprahepatic IVC clamping caused a fall in arterial pressure, with the development of ECG signs of myocardial ischaemia, but these abnormalities resolved rapidly. The IVC segment approach is a clinically acceptable approach to liver gene therapy. However, it is less effective in pigs than in rodents, possibly because of larger liver size or a less compliant connective tissue framework. PMID:18004400

  5. Assessment of Snared-Loop Technique When Standard Retrieval of Inferior Vena Cava Filters Fails

    SciTech Connect

    Doody, Orla, E-mail: orla_doody@hotmail.com; Noe, Geertje; Given, Mark F.; Foley, Peter T.; Lyon, Stuart M. [Alfred Hospital, Department of Radiology (Australia)

    2009-01-15

    Purpose To identify the success and complications related to a variant technique used to retrieve inferior vena cava filters when simple snare approach has failed. Methods A retrospective review of all Cook Guenther Tulip filters and Cook Celect filters retrieved between July 2006 and February 2008 was performed. During this period, 130 filter retrievals were attempted. In 33 cases, the standard retrieval technique failed. Retrieval was subsequently attempted with our modified retrieval technique. Results The retrieval was successful in 23 cases (mean dwell time, 171.84 days; range, 5-505 days) and unsuccessful in 10 cases (mean dwell time, 162.2 days; range, 94-360 days). Our filter retrievability rates increased from 74.6% with the standard retrieval method to 92.3% when the snared-loop technique was used. Unsuccessful retrieval was due to significant endothelialization (n = 9) and caval penetration by the filter (n = 1). A single complication occurred in the group, in a patient developing pulmonary emboli after attempted retrieval. Conclusion The technique we describe increased the retrievability of the two filters studied. Hook endothelialization is the main factor resulting in failed retrieval and continues to be a limitation with these filters.

  6. Use of a Trellis device for endovascular treatment of venous thrombosis involving a duplicated inferior vena cava.

    PubMed

    Saettele, Megan R; Morelli, John N; Chesis, Paul; Wible, Brandt C

    2013-12-01

    Congenital anomalies of the inferior vena cava (IVC) are increasingly recognized with CT and venography techniques. Although many patients with IVC anomalies are asymptomatic, recent studies have suggested an association with venous thromboembolism. We report the case of a 62-year-old woman with extensive venous clot involving the infrarenal segment of a duplicated left IVC who underwent pharmacomechanical thrombectomy and tissue plasminogen activator catheter-directed thrombolysis with complete deep venous thrombosis resolution. To our knowledge this is the first reported case in the English literature of the use of a Trellis thrombectomy catheter in the setting of duplicated IVC. PMID:23370490

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

    PubMed Central

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

    2014-01-01

    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

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

    SciTech Connect

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

    2013-12-15

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

  9. Duodenocaval Fistula in a Patient with Inferior Vena Cava Leiomyosarcoma Treated by Surgical Resection and Caval Polytetrafluoroethylene Prosthesis

    PubMed Central

    Ippolito, Davide; Querques, Giulia; Drago, Silvia Girolama; Bonaffini, Pietro Andrea; Sironi, Sandro

    2015-01-01

    Inferior vena cava (IVC) leiomyosarcoma represents an extremely rare disease that commonly involves the segment between the inflow of the renal veins and the inflow of the hepatic veins (46% of cases). We report the case of a patient affected by an IVC leiomyosarcoma, treated with surgical resection, caval reconstruction with polytetrafluoroethylene (PTFE), and right nephrectomy, followed by external beam radiotherapy. Oncological follow-up was negative for 17 years after this combined treatment, since the patient developed a duodenocaval fistula (DCF). PMID:26185702

  10. Evaluation of ductus venosus and inferior vena cava by using multiple Doppler ultrasound parameters in healthy fetuses

    Microsoft Academic Search

    Francisco M. P. Gallarreta; Wellington P. Martins; Carolina O. Nastri; Francisco Mauad Filho; Luis Guilherme C. Nicolau; Daniela A. Barra; Edson N. Morais; Gerson C. Crott

    2011-01-01

    Purpose  The objective of this study was to describe multiple Doppler ultrasound parameters of ductus venosus and inferior vena cava\\u000a in fetuses at gestational ages ranging from 22 to 38 weeks.\\u000a \\u000a \\u000a \\u000a \\u000a Study design  In this prospective observational study, Doppler ultrasound exams were performed in 45 healthy fetuses at 22, 26, 34, and\\u000a 38 weeks. Maximum venous velocity, minimum venous velocity, venous pulsatility index, and

  11. Long-term results of vena cava filters: Experiences with the LGM and the Titanium Greenfield devices

    Microsoft Academic Search

    Guenther Wittenberg; Vera Kueppers; Alexander Tschammler; Wolfgang Scheppach; Werner Kenn; Dietbert Hahn

    1998-01-01

    Purpose: Vena cava filter (VCF) application is the method of choice to prevent recurrent pulmonary embolism in patients with deep\\u000a venous thrombosis. Because of the reported complications after VCF placement we summarize our long-term follow-up results\\u000a with the LGM and Titanium Greenfield (TG) devices.\\u000a \\u000a \\u000a Methods: Eighty-seven LGM VCF and 17 TG VCF were placed in 104 patients (average age 64

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

    SciTech Connect

    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

    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.

  13. Internal jugular and common femoral venous access for the removal of a long-term embedded vena cava filter

    PubMed Central

    Salati, Umer; Govender, Pradeep; Torreggiani, William; Browne, Ronan

    2014-01-01

    We describe an inferior vena cava filter retrieval technique requiring triple venous access performed in a 35-year-old male who was referred for filter removal 16 months after its insertion. The filter showed a right-sided tilt with endothelialization of the distal filter struts into the caval wall. Access was required via both internal jugular veins to straighten the filter using a snared-loop technique. Further 18 F right common femoral vein access was required to snare and remove the filter, which could not be completely collapsed distally due to endothelialized tissue, precluding normal removal via the jugular venous route. PMID:24509181

  14. Endothelin-1-mediated wave-like [Ca2+]i oscillations in intact rabbit inferior vena cava.

    PubMed

    Dai, Jiazhen; Lee, Cheng-Han; Poburko, Damon; Szado, Tania; Kuo, Kuo-Hsing; van Breemen, Cornelis

    2007-01-01

    Endothelin-1 (ET1) is an endogenous vasoconstrictor released by the vascular system to regulate the contractility of vascular smooth muscle cells (VSMC). It is implicated in the pathogenesis of hypertension and diabetic vasculopathy. In rabbit inferior vena cava (IVC), 10 nM ET1 induces tonic contraction mainly via type A endothelin receptor activation. Using confocal imaging of Fluo-3 loaded in thein situ VSMC within the intact IVC, we found that ET1 elicited [Ca2+]i oscillations with an average frequency of 0.31 +/- 0.01 Hz. These [Ca2+]i oscillations occurred as repetitive Ca2+ waves traveling along the longitudinal axis of the cells with an average velocity of 29 +/- 3 microm/s. The Ca2+ waves were not synchronized between neighboring VSMC nor were they propagated between them. Nifedipine (10 microM) inhibited the tonic contraction by 27.0 +/- 5.0% while SKF96365 (50 microM) abolished the remaining contraction. In a parallel Ca2+ study, nifedipine reduced the frequency of the oscillations to 0.22 +/- 0.01 Hz while SKF96365 abolished the remaining [Ca2+]i oscillations. Subsequent application of 25 mM caffeine elicited no further Ca2+ signal. Thus, we conclude that ET1 stimulates tonic contraction in the rabbit IVC by inducing [Ca2+]i oscillations and that stimulated Ca2+ entry through both the L-type voltage-gated Ca2+ channels and a nifedipine-resistant and SKF96365-sensitive pathway is crucial for the maintenance of [Ca2+]i oscillations and tonic contraction. PMID:17657165

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

    PubMed Central

    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

    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

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

    SciTech Connect

    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

    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.

  17. Lake Effects: The Lake Superior Curriculum Guide.

    ERIC Educational Resources Information Center

    Beery, Tom; And Others

    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…

  18. Vo encerrar 16 cursos no superior

    E-print Network

    Instituto de Sistemas e Robotica

    Vão encerrar 16 cursos no superior por falta de procura Há um ano eram quase 200 mas nem todos encerraram. E há cursos que não podem aumentar vagas devido ao índice de desemprego Pl5 #12;Falta de procura encerra 16 cursos do ensino superior no próximo ano Há um ano, eram cerca de 200 na mesma situação, ainda

  19. Biomechanics of superior oblique Z-tenotomy

    PubMed Central

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

    2013-01-01

    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

  20. UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITECNICA SUPERIOR

    E-print Network

    Autonoma de Madrid, Universidad

    UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITECNICA SUPERIOR PROYECTO FIN DE CARRERA ESTUDIO DE LA;Proyecto fin de carrera Año 2009 Pablo Núñez López Universidad Autónoma de Madrid II ESTUDIO DE LA Informática Escuela Politécnica Superior Universidad Autónoma de Madrid Septiembre 2009 #12;Proyecto fin de

  1. Universidad Autonoma de Madrid Escuela politecnica superior

    E-print Network

    Autonoma de Madrid, Universidad

    Universidad Aut´onoma de Madrid Escuela polit´ecnica superior Proyecto fin de carrera a Informatica Escuela Politecnica Superior Universidad Autonoma de Madrid Abril 2012 #12;#12;Resumen y Palabras su d a a d a fuera de su hogar. Metro de Madrid transporta cien mil personas al d a [36

  2. Rehearsal Characteristics of "Superior" Band Directors

    ERIC Educational Resources Information Center

    Juchniewicz, Jay; Kelly, Steven N.; Acklin, Amy I.

    2014-01-01

    The purpose of this study was to investigate the rehearsal characteristics of "superior" middle and high school band directors. A total of 131 respondents from Florida, Kentucky, and North Carolina who received a "superior" rating for 4 out of the past 5 years, completed an open-ended essay question online asking them to…

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

    SciTech Connect

    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

    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.

  4. Long-Term Results of Vena Cava Filters: Experiences with the LGM and the Titanium Greenfield Devices

    SciTech Connect

    Wittenberg, Guenther; Kueppers, Vera; Tschammler, Alexander [Institut fuer Roentgendiagnostik der Universitaet WuerzburgJosef-Schneider-Strasse 2, D-97080 Wuerzburg (Germany); Scheppach, Wolfgang [Medizinische Klinik der Universitaet Wuerzburg, Josef-Schneider-Strasse 2, D-97080 Wuerzburg (Germany); Kenn, Werner; Hahn, Dietbert [Institut fuer Roentgendiagnostik der Universitaet WuerzburgJosef-Schneider-Strasse 2, D-97080 Wuerzburg (Germany)

    1998-05-15

    Purpose: Vena cava filter (VCF) application is the method of choice to prevent recurrent pulmonary embolism in patients with deep venous thrombosis. Because of the reported complications after VCF placement we summarize our long-term follow-up results with the LGM and Titanium Greenfield (TG) devices. Methods: Eighty-seven LGM VCF and 17 TG VCF were placed in 104 patients (average age 64 years). The follow-up examinations were performed by color-coded duplex sonography, plain radiographs, cavography, and computed tomo-graphy (CT). The maximum observation time was 81 months. Results: Filter migration occurred in 11% (8/76) of the LGM VCF and 15% (2/13) of the TG VCF. Vena cava thrombosis was seen in 17% (13/76) of the patients with an LGM VCF and in 31% (4/13) of those with a TG VCF. The patency rate was 95% (72/76) for the LGM VCF and 92% (12/13) for the TG VCF. Pulmonary embolism was noted in 3 patients after LGM VCF insertion and in no patient after TG VCF insertion. Conclusion: A VCF should only be inserted in a patient after pulmonary embolism and when there is strict proof of the indication.

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

    PubMed

    Lee, Jun Ho; Choi, Dong Won

    2013-12-01

    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

  6. Gunther Tulip Inferior Vena Cava Filter Placement During Treatment for Deep Venous Thrombosis of the Lower Extremity

    SciTech Connect

    Yamagami, Takuji, E-mail: yamagami@koto.kpum.ac.jp; Kato, Takeharu; Iida, Shigeharu; Hirota, Tatsuya; Nishimura, Tsunehiko [Kyoto Prefectural University of Medicine, Department of Radiology Graduate School of Medical Science (Japan)

    2005-05-15

    Purpose. To evaluate the efficacy and safety of Gunther tulip retrievable vena cava filter (GTF) implantation to prevent pulmonary embolism during intravenously administered thrombolytic and anticoagulation therapy and interventional radiological therapy for occlusive or nonocclusive deep venous thrombosis (DVT) of the lower extremity. Methods. We evaluated placement of 55 GTFs in 42 patients with lower extremity DVT who had undergone various treatments including those utilizing techniques of interventional radiology. Results. Worsening of pulmonary embolism in patients with existing pulmonary embolism or in those without pulmonary embolism at the time of GTF insertion was avoided in all patients. All attempts at implantation of the GTF were safely accomplished. Perforation and migration experienced by one patient was the only complication. Mean period of treatment for DVT under protection from pulmonary embolism by the GTF was 12.7 {+-} 8.3 days (mean {+-} SD, range 4-37 days). We attempted retrieval of GTFs in 18 patients in whom the venous thrombus had disappeared after therapy, and retrieval in one of these 18 cases failed. GTFs were left in the vena cava in 24 patients for permanent use when the DVT was refractory to treatment. Conclusion. The ability of the GTF to protect against pulmonary embolism during treatment of DVT was demonstrated. Safety in both placement and retrieval was clarified. Because replacement with a permanent filter was not required, use of the GTF was convenient when further protection from complicated pulmonary embolism was necessary.

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

    PubMed Central

    Lee, Jun Ho; Choi, Dong Won

    2013-01-01

    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

  8. An abdominal aortic aneurysm (AAA) in combination with duplication of the inferior vena cava (IVC), the right renal artery (RRA) and the right renal vein (RRV).

    PubMed

    Khaledpour, C; Matanovic, P; Rienäcker, J; Grönniger, J

    1990-01-01

    Intra-abdominal abnormality of vessels may sometimes lead to complications. A case of the rare combination of an abdominal aortic aneurysm (AAA) at the origin of the inferior mesenteric a. with duplications of the inferior vena cava (IVC), the right renal a. (RRA) and the right renal v. (RRV) as well as absence of the left common iliac v. is reported. PMID:2345901

  9. 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

    Petta, Jason

    Discovery of a Topological Insulator Bi2Se3 with a Single Surface Dirac Cone. (DMR-0819860) IRG field is applied. Recent research has uncovered a new class of insulators, called topological insulators spectroscopy (ARPES). In a new breakthrough, Hasan and Cava have now identified a second Topological Insulator

  10. Surgical Management of Renal Cell Carcinoma with Tumor Thrombus in the Renal and Inferior Vena Cava: The University of Miami Experience in Using Liver Transplantation Techniques

    Microsoft Academic Search

    Gaetano Ciancio; Alan S. Livingstone; Mark Soloway

    2007-01-01

    ObjectivesRenal cell carcinoma (RCC) with tumor thrombus in the inferior vena cava (IVC) poses a challenge to the surgeon due to the potential for massive hemorrhage and tumor thromboemboli. We developed a technique for safe resection of these tumors through a transabdominal approach, without recourse to cardiopulmonary bypass (CPB).

  11. Inferior vena cava filters and postoperative outcomes in patients undergoing bariatric surgery: a meta-analysis.

    PubMed

    Kaw, Roop; Pasupuleti, Vinay; Wayne Overby, D; Deshpande, Abhishek; Coleman, Craig I; Ioannidis, John P A; Hernandez, Adrian V

    2014-01-01

    Background: Pulmonary embolism(PE)accounts for almost 40% of perioperative deaths after bariatric surgery.Placement of prophylactic inferior vena cava(IVC) filter before bariatric surgery to improve outcomes has shown varied results. We performed a meta-analysis to evaluate post- operative outcomes associated with the preoperative placement of IVC filters in these patients. Methods: A systematic review was conducted by three investigators independently in PubMed, EMBASE, the Web of Science and Scopus until February 28,2013.Our search was restricted to studies in adult patients undergoing bariatric surgery with and without IVC filters. Primary outcomes were postoperative deep vein thrombosis(DVT),pulmonary embolism (PE),and postoperative mortality. Meta-analysis used random effects models to account for heterogeneity,and Sidik- Jonkman method to account for scarcity of outcomes and studies. Associations are shown as Relative Risks(RR) and 95% Confidence Intervals(CI). Results: Seven observational studies were identified (n=102,767), with weighted average inci- dences of DVT(0.9%),PE(1.6%),and mortality(1.0%)for a follow-up ranging from 3 weeks to 3 months. Use of IVC filters was associated with an approximately 3-fold higher risk of DVT and death that was nominally significant for the former outcome, but not the latter (RR2.81,95%CI 1.33-5.97, p=0.007; and RR 3.27,95%CI0.78-13.64, p=0.1, respectively);there was no difference in the risk of PE(RR1.02,95%CI0.31-3.77,p=0.9). Moderate to high heterogeneity of effects was noted across studies. Conclusions: Placement of IVC filter before bariatric surgery Is associated with higher risk of postoperative DVT and mortality. A similar risk of PE inpatients with and without IVC filter placement cannot exclude a benefit, given the potential large imbalance in risk at baseline.Ran- domized trials are needed before IVC placement can be recommended. (SurgObesRelatDis 2015;11:268-269.) r 2015 American Society for Metabolic and Bariatric Surgery. PMID:25224168

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

    SciTech Connect

    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

    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.

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

    SciTech Connect

    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

    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.

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

    SciTech Connect

    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

    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.

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

    SciTech Connect

    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

    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.

  16. 78 FR 21116 - Superior Supplier Incentive Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-09

    ...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...

  17. UNIVERSIDADE TCNICA DE LISBOA INSTITUTO SUPERIOR TCNICO

    E-print Network

    da Silva, Alberto Rodrigues

    activos tangíveis. O capital humano, estrutural e relacional é conhecimento essencial nas organizações of Organizational Relational Capital Using SNARE Alexandre Humberto dos Santos Barão Supervisor: Doctor Alberto INSTITUTO SUPERIOR TÉCNICO Social Networks Modeling and Evaluation of Organizational Relational Capital

  18. Undifferentiated Intimal Sarcoma of the Inferior Vena Cava with Extension to the Right Atrium and Renal Vasculature

    PubMed Central

    Afzal, Aasim M.; Alsahhar, Jamil; Podduturi, Varsha; Schussler, Jeffrey M.

    2015-01-01

    Primary sarcomas of the great vessels (aorta, pulmonary artery, and inferior vena cava (IVC)) are exceedingly rare. We report a rare case of an undifferentiated intimal sarcoma of the IVC with extension to the right atrium, adrenal, and renal veins. The patient underwent extensive resection, reconstruction of the IVC, and subsequent adjuvant chemotherapy. Patient has tolerated chemotherapy and, at 17 months after resection, the patient remains free of tumor recurrence. Undifferentiated intimal sarcomas remain a rare entity with only five cases of venous undifferentiated intimal sarcomas reported in the literature, two of which occurred in the IVC. Intimal sarcomas tend to carry a poor prognosis with the limited literature available on treatment approaches. Our objective is to highlight this rare entity and possible treatment approach which we utilized. Primary sarcomas of IVC need to be included as part of a complete differential diagnosis in patients with atrial masses or recurrent pulmonary emboli.

  19. Streptococcus constellatus Causing Septic Thrombophlebitis of the Right Ovarian Vein with Extension into the Inferior Vena Cava

    PubMed Central

    Haidar, Abdallah; Haddad, Amy; Naqvi, Amir; Onyesoh, Ngozi U.; Malik, Rushdah; Williams, Michael

    2015-01-01

    Introduction. Streptococcus constellatus collectively with Streptococcus anginosus and Streptococcus intermedius constitute the Streptococcus anginosus (formerly Streptococcus milleri) group. Though they are commonly associated with abscesses, bacteremia with subsequent septic thrombophlebitis is extremely rare, and resulting mortality is infrequent. Case Presentation. We report a case of a previously healthy 60-year-old African American female who presented with Streptococcus constellatus bacteremia associated with septic thrombophlebitis to the right ovarian vein extending into the inferior vena cava. She was urgently treated with antibiotics and anticoagulation. Conclusion. Septic thrombophlebitis has a clinical presentation that is often misleading. Therefore, a high clinical index of suspicion and the use of appropriate imaging modalities (computed tomography) are essential in recognizing and confirming this diagnosis. Prompt treatment is warranted. Surgical thrombectomies have been successfully replaced by a combination of antibiotics and anticoagulation therapy. PMID:26171262

  20. Inhibition of noradrenaline release in the rat vena cava via prostanoid receptors of the EP3-subtype.

    PubMed Central

    Molderings, G.; Malinowska, B.; Schlicker, E.

    1992-01-01

    1. In segments of the rat vena cava preincubated with [3H]-noradrenaline and superfused with physiological salt solution (containing desipramine and corticosterone), we studied the effects of prostaglandins of the D, E and F series, of a prostacyclin analogue and a thromboxane-mimetic and of subtype-selective prostaglandin E-receptor (EP-receptor) ligands on the electrically (0.66 Hz)-evoked tritium overflow. 2. The electrically-evoked tritium overflow was inhibited by prostaglandin E2 (maximum inhibition by about 80%; pIC40 7.49). The effect of prostaglandin E2 was not affected by rauwolscine, which, by itself, increased the evoked overflow; the alpha 2-adrenoceptor antagonist was added to the superfusion medium in all subsequent experiments. Indomethacin failed to affect either the evoked tritium overflow or its inhibition by prostaglandin E2. 3. The inhibitory effect of prostaglandin E2 on the electrically-evoked tritium overflow was not altered by the EP1-receptor antagonist. AH 6809 (6-isopropoxy-9-oxoxanthene-2-carboxylic acid) at a concentration at least 30 fold higher than its pA2 value at EP1-receptors. The following compounds mimicked the effect of prostaglandin E2 showing the following rank order of potencies: misoprostol (EP2-/EP3-receptor agonist) congruent to sulprostone (EP1-/EP3-receptor agonist) congruent to prostaglandin E1 = prostaglandin E2 >> iloprost (EP1-/IP-receptor agonist) = prostaglandin F2 alpha. The evoked overflow was not affected by high concentrations of prostaglandin D2 or the thromboxane-mimetic U46619 (9,11-dideoxy-11 alpha, 9 alpha-epoxy-methano-prostaglandin F2 alpha). 4. The present results suggest that the postganglionic sympathetic nerve fibres innervating the rat vena cava are endowed with presynaptic EP3-receptors.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:1330175

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

    PubMed

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

    2014-11-01

    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

  2. 14 CFR 385.7 - Exercise of authority by superiors.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 2014-01-01 false Exercise of authority by superiors. 385.7...ASSIGNMENTS General Provisions § 385.7 Exercise of authority by superiors. ...responsibility, the superior may choose to exercise the assigned power personally....

  3. 14 CFR 385.7 - Exercise of authority by superiors.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 2013-01-01 false Exercise of authority by superiors. 385.7...ASSIGNMENTS General Provisions § 385.7 Exercise of authority by superiors. ...responsibility, the superior may choose to exercise the assigned power personally....

  4. 14 CFR 385.7 - Exercise of authority by superiors.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 2012-01-01 false Exercise of authority by superiors. 385.7...ASSIGNMENTS General Provisions § 385.7 Exercise of authority by superiors. ...responsibility, the superior may choose to exercise the assigned power personally....

  5. 14 CFR 385.7 - Exercise of authority by superiors.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

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

  6. 14 CFR 385.7 - Exercise of authority by superiors.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

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

  7. Reducción y reciclaje de residuos sólidos urbanos en centros de educación superior: Estudio de caso

    Microsoft Academic Search

    L. Maldonado

    2006-01-01

    The municipal waste generated by CINVESTAV-Mérida was characterized for a period of three years. The municipal solid waste was composed of 48 % organics; 20% cardboard and paper; 8 % soft drinks or purified water plastic bottles (polyethylene terephthalate, PET) and diverse plastics; 5 % glass bottles or containers and broken laboratory glass; 2 % aluminium cans, and 17 %

  8. Ensino Superior de excelncia altura em que o Ensino Superior portugus granjeia de significativa notoriedade

    E-print Network

    Instituto de Sistemas e Robotica

    Ensino Superior de excelência Numa altura em que o Ensino Superior português granjeia de.° melhor do mundo em 20 12, tendo subido uma posição em relação ao ranking do ano anterior. Portugal melhora em todos os indicadores avaliados pela lista elaborada pela rede internacional Universitas 2 1

  9. UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITECNICA SUPERIOR

    E-print Network

    Autonoma de Madrid, Universidad

    estudiar los distintos casos se ha hecho uso del simulador VPI transmission maker de la empresa VPI phothonics. Palabras clave: 100Gbps, 40Gbps, Ã?pticas, PMD, CD, DQPSK, POLMUX, DP-QPSK, VPI transmission maker characteristics (noises). VPI transmission maker simulator, from the VPI photonics German company, has been used

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

    PubMed

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

    2013-12-15

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

  11. Butanol extract of Ecklonia cava prevents production and aggregation of beta-amyloid, and reduces beta-amyloid mediated neuronal death

    Microsoft Academic Search

    Il-Jun Kang; Young Eun Jeon; Xing Fu Yin; Jin-Sik Nam; Sang Guan You; Myo Soon Hong; Bong Geom Jang; Min-Ju Kim

    2011-01-01

    Beta-amyloid (A?) is a major pathogenic peptide for Alzheimer’s disease (AD) and is generated by the processing of amyloid precursor protein (APP). The A? monomers aggregate into oligomeric and fibrillar forms which have been implicated as the toxic species inducing the neuronal dysfunction. Brown algae Ecklonia cava is known for its anti-oxidant and anti-inflammatory functions. Therefore, we tested the effect

  12. Isolation and identification of new compound, 2,7?phloroglucinol6,6?-bieckol from brown algae, Ecklonia cava and its antioxidant effect

    Microsoft Academic Search

    Sung-Myung Kang; Soo-Jin Heo; Kil-Nam Kim; Seung-Hong Lee; You-Jin Jeon

    Brown algae, Ecklonia cava has been regarded as a useful material in the prevention or treatment of several human diseases in Jeju Island, Korea. In this study, we investigated its antioxidant activity, and isolated a new antioxidative compound, which was identified as 2,7?-phloroglucinol-6,6?-bieckol (PHB) on the basis of LC\\/MS, as well as 1H and 13C NMR spectroscopy results. The antioxidant

  13. Establishing the Superiority of Florida Honey

    E-print Network

    Jawitz, James W.

    Florida melitto files Establishing the Superiority of Florida Honey JAN - MAR 2011 Dr. Liwei Gu. Historically, Florida honeys have faced competition from low-cost, imported honey on grocery store shelves honey gets passed by. But honey is not just a food commodity. It has many other beneficial qualities

  14. ENGLISH LANGUAGE ARTS FOR THE SUPERIOR STUDENT.

    ERIC Educational Resources Information Center

    OLSON, HELEN F.

    THE SEATTLE PUBLIC SCHOOLS DEFINED THE SUPERIOR STUDENT AS ONE WHO COULD ASSOCIATE AND INTERRELATE CONCEPTS AND COULD CRITICALLY EVALUATE FACTS AND ARGUMENTS. HE COULD CREATE NEW IDEAS AND ORIGINATE NEW LINES OF THOUGHT, HE HAD THE ABILITY TO REASON COMPLEX PROBLEMS THROUGH AS WELL AS TO UNDERSTAND OTHER SITUATION, OTHER TIMES, AND OTHER PEOPLE.…

  15. UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITECNICA SUPERIOR

    E-print Network

    Autonoma de Madrid, Universidad

    UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITECNICA SUPERIOR PROYECTO FIN DE CARRERA PLATAFORMA GENÉRICA PARA DESARROLLO CON ROBOTS MÓVILES Ismail Rebah Bouaiachi Diciembre 2009 #12;#12;PLATAFORMA Autónoma de Madrid Diciembre de 2009 #12;#12;Palabras clave: Robot, plataforma móvil, diseño modular

  16. Superiority of Spaced Seeds for Homology Search

    E-print Network

    Zhang, Louxin

    Superiority of Spaced Seeds for Homology Search Louxin Zhang Abstract--In homology search, good spaced seeds have higher sensitivity for the same cost (weight). However, elucidating the mechanism that confers power to spaced seeds and characterizing optimal spaced seeds still remain unsolved. This paper

  17. High resolution aeromagnetic survey of Lake Superior

    Microsoft Academic Search

    D. J. Teskey; M. D. Thomas; R. A. Gibb; S. D. Dods; K. Fadaie; R. P. Kucks; V. W. Chandler; J. D. Phillips

    1991-01-01

    A 57,000 line kilometer, high-resolution aeromagnetic survey was flown in 1987 as a contribution to the Great Lakes International Multidisciplinary Program on Crustal Evolution (GLIMPCE). Existing aeromagnetic data from the United States and Canada were combined with the new data to produce a composite map and gridded data base of the Lake Superior region (Figure 1). Analysis of the new

  18. UNIVERSIDAD DE CORDOBA Escuela Politecnica Superior

    E-print Network

    Fernandez, Thomas

    una instituci´on de ense~nanza superior o centro de investigaci´on de prestigio, cursando estudios o, Italy 4. Parte de la tesis doctoral se ha redactado y presentado en dos idiomas, cas- tellano e ingl´es

  19. Sleep Patterns in Children of Superior Intelligence.

    ERIC Educational Resources Information Center

    Busby, K.; Pivik, R. T.

    1983-01-01

    To examine the relationship between superior intellectual functioning and physiological patterns and events during sleep, sleep records made on five consecutive nights and based on standard electrographic measures were made for 11 male children between 8 and 12 years of age. (RH)

  20. Universidad Autonoma de Madrid Escuela Politecnica Superior

    E-print Network

    Autonoma de Madrid, Universidad

    UN SISTEMA DE RECONOCIMIENTO FORENSE DE LOCUTOR UTILIZANDO PAR´AMETROS FON´ETICO-AC ´USTICOS Y´ia Superior en Telecomunicaci´on Alberto de Castro Rodr´iguez Octubre 2009 #12;#12;DESARROLLO DE UN SISTEMA DE;#12;Resumen En este PFC se presentan dos sistemas de reconocimiento forense de locutor basados en caracter

  1. 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...

  2. Superior Semicircular Canal Dehiscence: Auditory Mechanisms

    Microsoft Academic Search

    Jocelyn Songer

    2004-01-01

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

  3. 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...

  4. Synthetic organic toxicants in Lake Superior

    Microsoft Academic Search

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

    2004-01-01

    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

  5. 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 ...

  6. Superior laryngeal nerve block: an anatomical study.

    PubMed

    Stockwell, M; Lozanoff, S; Lang, S A; Nyssen, J

    1995-01-01

    Superior laryngeal nerve anaesthesia is frequently used to facilitate endotracheal intubation in the awake patient. We have modified the transcutaneous approach to this nerve block to employ a short bevel needle. This improves tactile perception in performing the procedure thus simplifying identification of the correct depth of injection. This study was designed to determine the anatomical basis of superior laryngeal nerve anaesthesia and to estimate the success rate using our modified technique. At autopsy, 20 cadavers had nerve block performed substituting 0.02% methylene blue for local anaesthetic. Dissection was then performed to identify the anatomical structures stained by the simulated local anaesthetic. Additional dissections were performed in formalin-fixed cadavers. We found that the dye was injected into the paraglottic space bounded laterally by the thyrohyoid membrane and thyroid cartilage, medially by the laryngeal submucosa, caudad by the conus elasticus, cephalad by the hyoid bone, and anteriorly and posteriorly by the anterior and posterior thyrohyoid ligaments, respectively. The internal laryngeal nerve, the sensory branch of the superior laryngeal nerve, passed through this compartment and was heavily stained with simulated local anaesthetic. Resistance to the passage of the short bevel needle was provided by the lateral glossoepiglottic fold, not the thyrohyoid membrane as we had expected. Of 40 injections, 39 were deemed successful for a success rate of 97.5%. We conclude that this is a simple and highly successful technique for performing superior laryngeal nerve anaesthesia. PMID:7712327

  7. The influence of atherosclerotic abdominal aorta on the shape of duplicated inferior vena cava: its potential clinical implications and vascular complications.

    PubMed

    Polguj, M; Majos, M; Topol, M; Majos, A; Stefa?czyk, L

    2014-11-01

    Duplication of the inferior vena cava (IVC) is a congenital condition where there are 2 large vessels: right IVC (RIVC) and left IVC (LIVC) on both sides of the abdominal aorta. Here, we present 2 cases of duplicated inferior cava coexisting with rare morphology of left gonadal (ovarian/testicular) vein. Both were observed during multidetector 64-row computer tomography. In first case atherosclerotic, tortuous abdominal aorta models both inferior venae cavae. The shape of veins were more- (RIVC) and less-arcuate (LIVC). Two years ago, the patient had been diagnosed with pulmonary thromboembolism. In second case abdominal aortic aneurysm models both large veins. The RIVC has a highly right-arcuate shape, while the LIVC has a less left-arcade shape. Our observation would seem to be especially important, because the tortuous abdominal aorta changes the shape of both IVC, and may predispose them for thrombosis formation. The presented report precisely describes the topography and measurements of the vessels in the retroperitoneal area. The literature concerning this anomaly, potential clinical implications and vascular complications are reviewed and the possible practical aspects are discussed. A familiarity with the anatomy of the most common types of venous anomalies is crucial for all surgeons, urologists and oncologists to reduce the risk of severe haemorrhage during all abdominal procedures. PMID:25448915

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

    SciTech Connect

    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

    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.

  9. Instituto Superior Tecnico Departamento de Matematica

    E-print Network

    Abreu, Miguel

    Instituto Superior T´ecnico Departamento de Matem´atica 2 o TESTE DE C´ALCULO DIFERENCIAL E a fun¸c~ao f definida pela s´erie de pot^encias: (3,5 val) f(x) = n=1 (-1)n (2x + 1)n 3n(n + 1) (a) Determine para que valores de x a s´erie de pot^encias ´e absolutamente convergente, simplesmente

  10. Instituto Superior Tecnico Departamento de Matematica

    E-print Network

    Abreu, Miguel

    Instituto Superior T´ecnico Departamento de Matem´atica 2 o TESTE DE C´ALCULO DIFERENCIAL E n! 5. Considere a fun¸c~ao f definida pela s´erie de pot^encias: (3,5 val) f(x) = n=1 (-1)n (3x + 1)n 2n(n + 1) (a) Determine para que valores de x a s´erie de pot^encias ´e absolutamente convergente

  11. 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.

  12. UNIVERSIDADE TECNICA DE LISBOA INSTITUTO SUPERIOR TECNICO

    E-print Network

    da Silva, Alberto Rodrigues

    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

  13. Lightning activity during the 1999 Superior derecho

    Microsoft Academic Search

    Colin G. Price; Brian P. Murphy

    2002-01-01

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

  14. High resolution aeromagnetic survey of Lake Superior

    NASA Astrophysics Data System (ADS)

    Teskey, D. J.; Thomas, M. D.; Gibb, R. A.; Dods, S. D.; Fadaie, K.; Kucks, R. P.; Chandler, V. W.; Phillips, J. D.

    A 57,000 line kilometer, high-resolution aeromagnetic survey was flown in 1987 as a contribution to the Great Lakes International Multidisciplinary Program on Crustal Evolution (GLIMPCE). Existing aeromagnetic data from the United States and Canada were combined with the new data to produce a composite map and gridded data base of the Lake Superior region (Figure 1). Analysis of the new data permits more accurate definition of faults and contacts within the Midcontinent Rift system (MCR). The aeromagnetic map provides important information supplemental to the seismic profiles acquired under the GLIMPCE program in 1986, allowing lateral extension of the seismic interpretation. In particular, modeling of the data provides an independent assessment of a reflection seismic model derived along line A (Figure 2). The profile and gridded digital data are available to geoscientists through the Geophysical Data Centre of the Geological Survey of Canada (GSC), while the gridded data are available from the USGS-EROS Data Center. GLIMPCE was established in 1985 to study the nature and genesis of the crust in the Great Lakes region. Program participants include the GSC, the U.S. Geological Survey (USGS), provincial and state surveys, and Canadian and American universities. In the Lake Superior area, a major objective of the program is to develop thermal, tectonic, and petrogenetic models for the evolution of the MCR and to evaluate these in the broader context of the tectonic evolution of the North American continent. Pre-1982 geological and geophysical knowledge of the MCR in the Lake Superior region has been summarized by Wold and Hinze [1982]. The Lake Superior region provides a unique window on this Proterozoic rift system, exposing igneous rock of the Keweenawan Supergroup that disappears under Paleozoic cover to the southwest.

  15. Superior sulcus tumor: radiographic diagnosis and workup

    SciTech Connect

    O'Connell, R.S.; McLoud, T.C.; Wilkins, E.W.

    1983-01-01

    Imaging studies of 29 patients with pathologically proven superior sulcus carcinoma of the lung were reviewed. Posteroanterior and lateral chest radiographs at the time of presentation demonstrated an asymmetric apical cap in 55% and an apical mass in 45%. Additional views of the chest were sometimes useful, however, the lordotic view was frequently misleading. Accurate assessment of the local extent of disease was best provided by computed tomography. Needle biopsy was the most efficacious nonsurgical method of establishing a pathologic diagnosis.

  16. UNIVERSIDAD AUTNOMA DE MADRID ESCUELA POLITCNICA SUPERIOR

    E-print Network

    Autonoma de Madrid, Universidad

    UNIVERSIDAD AUT�NOMA DE MADRID ESCUELA POLIT�CNICA SUPERIOR PROYECTO FIN DE CARRERA DESARROLLO EN iOS;III DESARROLLO EN iOS DE APLICACIONES DE GUIADO GPS PARA DISCAPACITADOS VISUALES AUTOR: Tomás Merino Autónoma de Madrid. Para ello se aprovecharán al máximo los recursos ofrecidos por la plataforma iOS de

  17. Instituto Superior Tecnico Departamento de Matematica

    E-print Network

    Nunes, João Pimentel

    . Uma harpa ´e formada por uma haste vertical ao longo do eixo Oy, por uma parte(1.5 val.) superior C1~ao esticadas na vertical, com um intervalo de 0.02, as cordas da harpa. Justifique que o comprimento total das cordas da harpa satisfaz a estimativa 100 1 0.02 (1 - x) dx 100 0.98 0 (1 - x) dx 7. Determine e

  18. Brain structure characteristics in intellectually superior schizophrenia.

    PubMed

    Vaskinn, Anja; Hartberg, Cecilie B; Sundet, Kjetil; Westlye, Lars T; Andreassen, Ole A; Melle, Ingrid; Agartz, Ingrid

    2015-04-30

    The current study aims to fill a gap in the knowledge base by investigating the structural brain characteristics of individuals with schizophrenia and superior intellectual abilities. Subcortical volumes, cortical thickness and cortical surface area were examined in intellectually normal and intellectually superior participants with schizophrenia and their IQ-matched healthy controls, as well as in intellectually low schizophrenia participants. We replicated significant diagnostic group effects on hippocampal and ventricular size after correction for multiple comparisons. There were no statistically significant effects of intellectual level or of the interaction between diagnostic group and intellectual level. Effect sizes indicated that differences between schizophrenia and healthy control participants were of similar magnitude at both intellectual levels for all three types of morphological data. A secondary analysis within the schizophrenia group, including participants with low intellectual abilities, yielded numerical, but no statistically significant differences on any structural brain measure. The present findings indicate that the brain structure abnormalities in schizophrenia are present at all intellectual levels, and individuals with schizophrenia and superior intellectual abilities have brain structure abnormalities of the same magnitude as individuals with schizophrenia and normal intellectual abilities. PMID:25754688

  19. Retrieval of Tip-embedded Inferior Vena Cava Filters by Using the Endobronchial Forceps Technique: Experience at a Single Institution.

    PubMed

    Stavropoulos, S William; Ge, Benjamin H; Mondschein, Jeffrey I; Shlansky-Goldberg, Richard D; Sudheendra, Deepak; Trerotola, Scott O

    2015-06-01

    Purpose To evaluate the use of endobronchial forceps to retrieve tip-embedded inferior vena cava (IVC) filters. Materials and Methods This institutional review board-approved, HIPAA-compliant retrospective study included 114 patients who presented with tip-embedded IVC filters for removal from January 2005 to April 2014. The included patients consisted of 77 women and 37 men with a mean age of 43 years (range, 18-79 years). Filters were identified as tip embedded by using rotational venography. Rigid bronchoscopy forceps were used to dissect the tip or hook of the filter from the wall of the IVC. The filter was then removed through the sheath by using the endobronchial forceps. Statistical analysis entailed calculating percentages, ranges, and means. Results The endobronchial forceps technique was used to successfully retrieve 109 of 114 (96%) tip-embedded IVC filters on an intention-to-treat basis. Five failures occurred in four patients in whom the technique was attempted but failed and one patient in whom retrieval was not attempted. Filters were in place for a mean of 465 days (range, 31-2976 days). The filters in this study included 10 Recovery, 33 G2, eight G2X, 11 Eclipse, one OptEase, six Option, 13 Günther Tulip, one ALN, and 31 Celect filters. Three minor complications and one major complication occurred, with no permanent sequelae. Conclusion The endobronchial forceps technique can be safely used to remove tip-embedded IVC filters. PMID:25581368

  20. Ecklonia cava Polyphenol Has a Protective Effect against Ethanol-Induced Liver Injury in a Cyclic AMP-Dependent Manner

    PubMed Central

    Yamashita, Haruka; Goto, Mayu; Matsui-Yuasa, Isao; Kojima-Yuasa, Akiko

    2015-01-01

    Previously, we showed that Ecklonia cava polyphenol (ECP) treatment suppressed ethanol-induced increases in hepatocyte death by scavenging intracellular reactive oxygen species (ROS) and maintaining intracellular glutathione levels. Here, we examined the effects of ECP on the activities of alcohol-metabolizing enzymes and their regulating mechanisms in ethanol-treated hepatocytes. Isolated hepatocytes were incubated with or without 100 mM ethanol. ECP was dissolved in dimethylsulfoxide. ECP was added to cultured cells that had been incubated with or without ethanol. The cells were incubated for 0–24 h. In cultured hepatocytes, the ECP treatment with ethanol inhibited cytochrome P450 2E1 (CYP2E1) expression and activity, which is related to the production of ROS when large quantities of ethanol are oxidized. On the other hand, ECP treatment with ethanol increased the activity of alcohol dehydrogenase (ADH) and aldehyde dehydrogenase. These changes in activities of CYP2E1 and ADH were suppressed by treatment with H89, an inhibitor of protein kinase A. ECP treatment with ethanol enhanced cyclic AMP concentrations compared with those of control cells. ECP may be a candidate for preventing ethanol-induced liver injury via regulating alcohol metabolic enzymes in a cyclic AMP-dependent manner. PMID:26096275

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

    SciTech Connect

    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

    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.

  2. 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

  3. 49 CFR 236.816 - Superiority of trains.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

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

  4. 49 CFR 236.816 - Superiority of trains.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

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

  5. 2. GREAT NORTHERN ELEVATORS (STEEL) 1900 SUPERIOR WISCONSIN; ANNEX NO. ...

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

    2. GREAT NORTHERN ELEVATORS (STEEL) 1900 SUPERIOR WISCONSIN; ANNEX NO. 3 (LEFT) ANNEX NO. 1 (RIGHT) 1920'S; CONVEYOR LINE LEADS TO ELEVATOR X. - Great Northern Elevator "S", Saint Louis Bay, Superior, Douglas County, WI

  6. HARVEST STATES GRAIN COOPERATIVES, SUPERIOR WISCONSIN; CONSTRUCTED OVER VARIOUS DATES ...

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

    HARVEST STATES GRAIN COOPERATIVES, SUPERIOR WISCONSIN; CONSTRUCTED OVER VARIOUS DATES BEGINNING IN 1942; LEFT SLIP (HUGHITT AVENUE) RIGHT SLIP (TOWER AVENUE) - Cenex-Harvest States Grain Cooperatives, Dock Street between Hughitt Avenue & Tower Avenue slips, Superior, Douglas County, WI

  7. 1. OVERALL VIEW OF SUPERIOR LAKE, WITH DAM SPILLWAY IN ...

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

    1. OVERALL VIEW OF SUPERIOR LAKE, WITH DAM SPILLWAY IN FOREGROUND, LOOKING NORTHWEST - High Mountain Dams in Upaco Unit, Superior Lake Dam, Ashley National Forest, 12.4 miles Northwest of Swift Creek Campground, Mountain Home, Duchesne County, UT

  8. Superior Energy Performance at Schneider Electric 

    E-print Network

    Willhite, E.

    2014-01-01

    Design the Strategy | Deliver Efficiency | Sustain Results ISO50001/SEP Superior Energy Performance at Schneider Electric ESL-IE-14-05-15 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014...-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Schneider Electric – Sustainability Services – 2014 4 Why Implement SEP / ISO 50001? Efficient Framework for Energy Management Program 1. ~~~~~~ 2. ~~~~~~ 3. ~~~~~~ 4. ~~~~~~ Plan...

  9. [Characterization of bilateral superior canal dehiscence].

    PubMed

    Boleas Aguirre, María Soledad; Migliaccio, Americo; Carey, John

    2007-11-01

    In the superior canal dehiscence syndrome, patients can have sound- or pressure-induced vertigo and oscillopsia. They may also present conductive hearing loss or higher than normal bone conduction thresholds. Clinical manifestations are due to the effect of a third mobile window in the inner ear created by the dehiscence. Diagnosis is based on clinical manifestations, vertical and rotatory nystagmus induced by sound and pressure reflecting SSC stimulation, reduced threshold and increased amplitude of vestibular evoked myogenic potentials (VEMP) and temporal bone CT scan images showing the SSC dehiscence. Characteristic eye movements can be recorded with the scleral search coil technique. PMID:17999910

  10. Spontaneous Dissection of the Superior Mesenteric Artery

    SciTech Connect

    Sheldon, Patrick J. [Department of Radiology, University of California San Diego Medical Center, 200 West Arbor Drive, San Diego, CA 92103 (United States); Esther, James B. [Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, West Campus, CC308E, One Deaconess Road, Boston, MA 02215 (United States); Sheldon, Elana L. [Department of Medicine, University of California San Diego Medical Center, 200 West Arbor Drive, San Diego, CA 92103 (United States); Sparks, Steven R. [Department of Surgery, University of California San Diego Medical Center, 200 West Arbor Drive, San Diego, CA 92103 (United States); Brophy, David P. [Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, West Campus, CC308E, One Deaconess Road, Boston, MA 02215 (United States); Oglevie, Steven B. [Department of Radiology, University of California San Diego Medical Center, 200 West Arbor Drive, San Diego, CA 92103 (United States)

    2001-09-15

    Spontaneous dissection of the superior mesenteric artery (SMA) is a rare occurrence, especially when not associated with aortic dissection [1]. Currently, only 28 cases appear to have been reported. Due to the scarcity of cases in the literature, the natural history of isolated, spontaneous SMA dissection is unclear. CT has been reported to be useful for the initial diagnosis of SMA dissection [2-5]. We present two recent cases of spontaneous SMA dissection in which enhanced spiral CT was instrumental in following the disease process and guiding clinical decision making.

  11. 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...

  12. Phakomatosis pigmentovascularis IIb with hypoplasia of the inferior vena cava and the right iliac and femoral veins causing recalcitrant stasis leg ulcers.

    PubMed

    Park, Jong-Gap; Roh, Kee-Young; Lee, Hyun-Jeong; Ha, Seog-Jun; Lee, Jun-Young; Yun, Sang Seob; Lim, Keun Woo; Song, Kyung Sup; Kim, Jin-Wou

    2003-08-01

    We present a patient with phakomatosis pigmentovascularis (PPV) type IIb accompanied with venous hypoplasia, from the inferior vena cava to the superficial femoral vein. Although it is not obvious whether this vascular anomaly, which is probably congenital, is coincidental or not, it is possible that the 2 diseases have some relationship each other, because PPV is thought to result from abnormal vasomotor activity during the embryonic period. In the diagnosis of type II PPV, careful examination and several studies are required to determine systemic involvement that may include large vessel changes. PMID:12894112

  13. 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

    Singh, Shivanshu; Garg, Nitin

    2015-01-01

    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

  14. Potential effect of phloroglucinol derivatives from Ecklonia cava on matrix metalloproteinase expression and the inflammatory profile in lipopolysaccharide-stimulated human THP1 macrophages

    Microsoft Academic Search

    Chang-Suk Kong; Jung-Ae Kim; Byul-Nim Ahn; Se-Kwon Kim

    The effects of the phloroglucinol derivatives dioxinodehydroeckol (1) and 1-(3?,5?-dihydroxyphenoxy)-7-(2?,4?,6-trihydroxyphenoxy)-2,4,9-trihydroxydibenzo-1,4-dioxin) (2) from Ecklonia cava on matrix metalloproteinase (MMP) expression and the inflammatory profile were investigated in lipopolysaccharide (LPS)-stimulated\\u000a human THP-1 macrophage cell models. Treatment with phloroglucinol derivatives inhibited MMP expression and the production\\u000a of pro-inflammatory cytokines such as IL-1?, IL-6 and TNF-?. In addition, the presence of compounds 1 and

  15. Percutaneous Retrieval of the Tulip Vena Cava Filter:Feasibility, Short and Long-Term Changes. An Experimental Study inDogs

    Microsoft Academic Search

    J. M. Neuerburg; S. Handt; K. Beckert; K. Tonn; E. Rasmussen; D. Hunter; R. W. Gunther

    2001-01-01

      Purpose: To evaluate experimentally the\\u000a retrievability of the Tulip inferior vena cava (IVC) filter in an in\\u000a vivo study. Changes which accompany venous healing after filter\\u000a retrieval were investigated.\\u000a Methods: In 12 dogs, 23\\u000a filters were inserted percutaneously into the lumbar and intrahepatic\\u000a segments of the IVC. Two weeks (n = 21 filters) or 3\\u000a weeks (n = 2 filters)

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

    PubMed

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

    2015-07-01

    To understand anomalies in Chiari's network better, we assessed the topographical anatomy of the fetal inferior vena cava (IVC), coronary sinus, and atria. We examined sagittal serial paraffin sections of 15 human fetuses of crown-rump length 24-36 mm, corresponding to a gestational age of 8 weeks. Although their outflow tract morphologies were similar, these 15 specimens could be classified into two groups. In eight specimens, the left common cardinal vein reached the body wall, whereas in the other seven the vein was obliterated near the left pulmonary vein. Irrespective of the group in which the specimen was included, the anteroposterior arrangement of the coronary sinus, the sinus septum (septum), and the right sinus valve (right valve) could be classified into three types: the right valve-septum-coronary sinus arrangement in seven specimens; the right valve-coronary sinus-septum arrangement in five; and the coronary sinus-right valve-septum arrangement in three. Depending on differences in topographical anatomy, the sinus septum separated the coronary sinus opening from either the right or the left atrium. Likewise, the coronary sinus opening was either adjacent to or distant from the IVC terminal. Rather than the counter-side position of the right valve being at the IVC terminal, the left sinus valve protruded leftward, forming an incomplete interatrial septum. Fetal variations seemed to be closely connected with individual variations and a high frequency of Chiari's network anomalies in adults. Clin. Anat. 28:627-637, 2015. © 2014 Wiley Periodicals, Inc. PMID:25425533

  17. Outcomes of retrievable inferior vena cava filters in patients with deep vein thrombosis and transient contraindication for anticoagulation

    PubMed Central

    Kim, Hyung-Kee; Song, Incheol; Jang, Ji-Hoon; Oh, Chang-Wug; Lee, Jong-Min

    2015-01-01

    Purpose To determine the efficacy of a retrievable inferior vena cava filter (IVCF) for patients with deep vein thrombosis (DVT) and transient contraindication for anticoagulant therapy, and to analyze the risk factors for filter thrombus in these patients. Methods We retrospectively reviewed the records of 70 patients who received a retrievable IVCF from January 2007 to June 2014 because of documented DVT and transient contraindication for anticoagulant therapy. The protocol for follow-up care generally consisted of anticoagulant therapy after high-risk periods, follow-up CT around 2 weeks after IVCF placement, and retrieval if possible. Results The 70 patients had a mean age of 61.8 years (range, 17-88 years), and 30 were male (43%). The indications for IVCF were recent trauma including surgery in 48 patients, recent hemorrhage in 14, and planned major surgery with DVT in 8 patients. Follow-up CT of 61 patients (87%) was performed. Aggravation or new development of pulmonary embolism (PE) was not found in any patient. Filter thrombus was detected in 23% of patients with follow-up CT (14/61). Filter thrombus was not detected in patients with isolated calf vein thrombosis (ICVT) (P = 0.079). The risk factor for filter thrombus was DVT progression on follow-up CT (P = 0.007) on multivariate analysis. Conclusion For patients with DVT and transient contraindication for anticoagulant therapy, a retrievable IVCF could prevent the aggravation or new development of PE. DVT progression on follow-up CT was associated with filter thrombus and ICVT was not related to filter thrombus in the present study. PMID:26131442

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

    SciTech Connect

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

    2010-09-01

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

  19. Lightning activity during the 1999 Superior derecho

    NASA Astrophysics Data System (ADS)

    Price, Colin G.; Murphy, Brian P.

    2002-12-01

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

  20. Lightning Activity During the 1999 Superior Derecho

    NASA Astrophysics Data System (ADS)

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

    2002-12-01

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

  1. Environmentally superior technologies for swine waste management.

    PubMed

    Humenik, F J; Rice, J M; Baird, C L; Koelsch, R

    2004-01-01

    The high nitrogen content of animal waste provides opportunities for processing to marketable byproducts and challenges for proper management to avoid harmful impacts. Technologies are being developed to conserve and utilize nitrogen as well as other valuable constituents in animal waste. Advanced treatment technologies are also being developed for housing/waste management systems that address public concerns and protect soil, water and air quality. Smithfield Foods, Premium Standard Farms and Frontline Farmers have entered into an agreement with North Carolina to develop environmentally superior technologies that meet these goals. The 18 candidate technologies are identified and three with the longest operating period, and thus most data to date are discussed. Methods for distributing this information for implementation of cost-effective technologies through the Curriculum Project and the National Center for Manure and Animal Waste Management will be presented. This work supports priority goals to conserve and utilize valuable animal waste constituents while also protecting against negative impacts. PMID:15137402

  2. Superior Colliculus and Visual Spatial Attention

    PubMed Central

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

    2013-01-01

    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

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

    NASA Astrophysics Data System (ADS)

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

    2013-12-01

    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.

  4. 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

  5. Multi-Objective Lake Superior Regulation

    NASA Astrophysics Data System (ADS)

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

    2011-12-01

    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.

  6. Superior phrenic artery: an anatomic study.

    PubMed

    Loukas, Marios; Louis, Robert G; Wartmann, Christopher T; Tubbs, R Shane; Esmaeili, Ehsan; Bagenholm, Allyson C; Merbs, William; Curry, Brian; Jordan, Robert

    2007-02-01

    The majority of anatomical textbooks offer very little information concerning the anatomy and distribution of the superior phrenic artery (SPA). However, in the last decade, a number of reports have appeared with reference to the transcatheter arterial chemoembolization of the collateral arterial supply of hepatic carcinoma (HC). Considering the potential role of the SPA as a source of collateral blood supply to HC, the aim of this study was to identify the origin and distribution of the SPA. One hundred formalin-fixed adult cadavers with no evidence of significant gross diaphragmatic pathology were examined. The right SPA originated from the aorta (R1) in 42%, as a branch of the proximal segment of the 10th intercostal artery (R2) in 33%, and as a branch of the distal segment of the 10th intercostal artery (R3) in 25%, of the specimens. The left SPA originated from the aorta (L1) in 51%, from proximal segment of the left 10th intercostal artery (L2) in 40%, and from the distal segment of the left 10th intercostal artery (L3) in 9%, of the specimens. In types R1, R2, L1 and L2 the SPA terminated, after a short course, within the medial and posterosuperior surfaces of the thoracic diaphragm and diaphragmatic crura. Conversely, in types R3 and L3 the lateral origin of the SPAs confined the ultimate distribution of the vessels to the posterior surface of the diaphragm. These findings could provide a better understanding of the anatomy and distribution of the arterial supply of the diaphragm and the potential involvement of the right SPA as an extrahepatic collateral artery developed in HC. PMID:17180633

  7. Superior electric double layer capacitors using ordered mesoporous carbons

    Microsoft Academic Search

    W. Xing; S. Z. Qiao; R. G. Ding; F. Lid; G. Q. Lu; Z. F. Yan; H. M. Cheng

    2006-01-01

    This paper reports for the first time superior electric double layer capacitive properties of ordered mesoporous carbon (OMCs) with varying ordered pore symmetries and mesopore structure. Compared to commercially used activated carbon electrode, Maxsorb, these OMC carbons have superior capacitive behavior, power output and high-frequency performance in EDLCs due to the unique structure of their mesopore network, which is more

  8. Research on information superiority evaluation model of command automation system

    Microsoft Academic Search

    Jie Zhang; Jing Guo; Xiaoyuan Jiang; Hongda Fan

    2004-01-01

    Information dominance plays a crucial role in achieving the operation superiority in joint operations, and command automation system is the guarantee of obtaining information dominance. So, it is important to analyze and assess the force effectiveness of command automation system. From the view of information dominance, information superiority model based on entropy is developed and information transformation quality of every

  9. Impairments in Tactile Search Following Superior Parietal Damage

    ERIC Educational Resources Information Center

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

    2011-01-01

    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

  10. 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...

  11. Water Quality of Streams Tributary to Lakes Superior and Michigan

    E-print Network

    559 Water Quality of Streams Tributary to Lakes Superior and Michigan Marine Biological Laboratory of Commercial Fisheries, H. E. Crowther, Director Wafer Quality of Streams Tributary to Lakes Superior.-Fisheries No. 559 Washington, D.C. January 1968 #12;#12;CONTENTS Page Abstract 1 Introduction 1 Materials

  12. Routes to remembering: the brains behind superior memory

    Microsoft Academic Search

    Elizabeth R. Valentine; John M. Wilding; Narinder Kapur; Eleanor A. Maguire

    2002-01-01

    Why do some people have superior memory capabilities? We addressed this age-old question by examining individuals renowned for outstanding memory feats in forums such as the World Memory Championships. Using neuropsychological measures, as well as structural and functional brain imaging, we found that superior memory was not driven by exceptional intellectual ability or structural brain differences. Rather, we found that

  13. 33 CFR 117.495 - Superior Oil Canal.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 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...

  14. 33 CFR 117.495 - Superior Oil Canal.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 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...

  15. 33 CFR 117.495 - Superior Oil Canal.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 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...

  16. 33 CFR 117.495 - Superior Oil Canal.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 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...

  17. 33 CFR 117.495 - Superior Oil Canal.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 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...

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

    SciTech Connect

    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

    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.

  19. 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

    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

    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.

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

    PubMed

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

    2015-04-01

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

  1. [Fulminant pulmonary embolism in the 35th gestational week. Sonographic detection of a thrombus in the inferior vena cava with normal cavography].

    PubMed

    Kilger, E; Anthuber, C; Berger, H; Jauch, K W; Polasek, J; Briegel, J; Haller, M

    1993-06-01

    Pulmonary embolism is the most common cause of maternal death during pregnancy. CASE REPORT. We report a 28-year-old obstetric patient (35th gestational week) who was admitted to the hospital because of intermittent vaginal bleeding caused by placenta totalis et accreta. Eleven days after admission she suffered a cardiac arrest. After cardiopulmonary resuscitation, an emergency caesarian section was performed and a healthy child was delivered. Abdominal sonography (B-mode) showed a floating thrombus in the inferior vena cava. Perfusion scintigraphy and cavography were normal; a computed tomography i.v. contrast medium study confirmed the presence of the thrombus. An open thrombectomy was performed to protect the patient from further pulmonary emboli. After 8 days she left the intensive care unit without residual complications. CONCLUSION. This case emphasises the importance of bedside sonography as a diagnostic method of identifying the source of a thrombus in patients with suspected pulmonary embolism. PMID:8342750

  2. Evaluation of antioxidant properties of a new compound, pyrogallol-phloroglucinol-6,6'-bieckol isolated from brown algae, Ecklonia cava

    PubMed Central

    Kang, Sung-Myung; Lee, Seung-Hong; Heo, Soo-Jin; Kim, Kil-Nam

    2011-01-01

    In this study, antioxidant and free radical scavenging activities of the natural antioxidative compound, pyrogallol-phloroglucinol-6,6'-bieckol (PPB) isolated from brown algae, Ecklonia cava was assessed in vitro by measuring the radical scavenging activities (DPPH, alkyl, hydroxyl, and superoxide) using electron spin resonance (ESR) spectrometry, intracellular reactive oxygen species (ROS) scavenging activity, and DNA damage assay. According to the results of these experiments, the scavenging activity PPB against difference radicals was in the following order: DPPH, alkyl, hydroxyl, and superoxide radicals (IC50; 0.90, 2.54, 62.93 and 109.05 µM). The antioxidant activities of PPB were higher than that of the commercial antioxidant, ascorbic acid. Furthermore, PPB effectively inhibited DNA damage induced by H2O2. These results suggest that the natural antioxidative compound, PPB, can be used by the natural food industry. PMID:22259673

  3. Dieckol from Ecklonia cava Regulates Invasion of Human Fibrosarcoma Cells and Modulates MMP-2 and MMP-9 Expression via NF-?B Pathway

    PubMed Central

    Zhang, Chen; Li, Yong; Qian, Zhong-Ji; Lee, Sang-Hoon; Li, Yong-Xin; Kim, Se-kwon

    2011-01-01

    The matrix metalloproteinase (MMP) family is involved in the breakdown of extracellular matrix in normal physiological processes, as well as in the disease processes such as arthritis and cancer metastasis. In the present study, dieckol was obtained with high yield from marine brown alga Ecklonia cava (EC), and its effect was assessed on the expression of MMP-2 and -9 and morphological changes in human fibrosarcoma cell line (HT1080). Dieckol inhibited the expression of MMP-2 and -9 in a dose-dependent manner and also suppressed the cell invasion and the cytomorphology in 3D culture system on HT1080 cells. Moreover, dieckol may influence nuclear factor kappa B (NF-?B) pathway without obvious influence on activator protein-1 (AP-1) pathway and tissue inhibitor of metalloproteinases (TIMPs). In conclusion, dieckol could significantly suppress MMP-2 and -9 expression and alter cytomorphology of HT1080 cell line via NF-?B pathway. PMID:21826183

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

    PubMed

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

    2014-09-01

    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

  5. Endothelium-Dependent Nitric Oxide and Hyperpolarization-Mediated Venous Relaxation Pathways in Rat Inferior Vena cava

    PubMed Central

    Raffetto, Joseph D.; Yu, Peng; Reslan, Ossama M.; Xia, Yin; Khalil, Raouf A.

    2011-01-01

    Introduction The vascular endothelium plays a major role in the control of arterial tone; however, its role in venous tissues is less clear. The purpose of this study was to determine the role of endothelium in the control of venous function, and the relaxation pathways involved. Methods Circular segments of inferior vena cava (IVC) from male Sprague-Dawley rats were suspended between two wires and isometric contraction to phenylephrine (Phe, 10?5M) and 96 mM KCl was measured. Acetylcholine (Ach, 10?10 to 10?5M) was added and the percentage venous relaxation was measured. To determine the role of nitric oxide (NO) and prostacyclin (PGI2), vein relaxation was measured in the presence of the NOS inhibitor L-NAME (3X10?4 M) and the COX inhibitor indomethacin (10?5 M). To measure the role of hyperpolarization, vein relaxation was measured in the presence of K+ channel activator cromakalim (10?11 to 10?6 M), and the nonselective K+ channel blocker tetraethylammonium (TEA, 10?3 M). To test for the contribution of a specific K+ channel, the effects of K+ channel blockers: glibenclamide (ATP-sensitive KATP, 10?5M), 4-aminopyridine (4-AP, voltage-dependent Kv, 10?3M), apamin (small conductance Ca2+-dependent SKCa, 10?7M), and iberiotoxin (large conductance Ca2+-dependent BKCa, 10?8M), on Ach-induced relaxation were tested. Results Ach caused concentration-dependent relaxation of Phe contraction (max 49.9±4.9%). Removal of endothelium abolished Ach-induced relaxation. IVC treatment with L-NAME partially reduced Ach relaxation (32.8±4.9%). In IVC treated with L-NAME plus indomethacin significant Ach-induced relaxation (33.6±3.2%) could still be observed, suggesting a role of endothelium-derived hyperpolarizing factor (EDHF). In IVC treated with L-NAME, indomethacin and TEA, Ach relaxation was abolished, supporting a role of EDHF. In veins stimulated with high KCl, Ach caused relaxation (max 59.5±3.5%) that was abolished in the presence of L-NAME and indomethacin suggesting that any Ach-induced EDHF is blocked in the presence of high KCl depolarizing solution, which does not favor outward movement of K+ ion and membrane hyperpolarization. Cromakalim, activator of KATP, caused significant IVC relaxation when applied alone or on top of maximal Ach-induced relaxation, suggesting that the Ach response may not involve KATP. Ach-induced relaxation was not inhibited by glibenclamide, 4-AP or apamin, suggesting little role of KATP, Kv or SKCa, respectively. In contrast, iberiotoxin significantly inhibited Ach-induced relaxation, suggesting a role of BKCa. Conclusions Thus endothelium-dependent venous relaxation plays a major role in the control of venous function. In addition to NO, an EDHF pathway involving BKCa may play a role in endothelium-dependent venous relaxation. PMID:22209615

  6. Ca2+-Dependent Contraction by the Saponoside Escin in Rat Vena Cava. Implications in Venotonic Treatment of Varicose Veins

    PubMed Central

    Raffetto, Joseph D.; Khalil, Raouf A.

    2011-01-01

    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

  7. Crashworthy Seats Would Afford Superior Protection

    NASA Technical Reports Server (NTRS)

    Gohmert, Dustin

    2009-01-01

    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.

  8. Food of lake trout in Lake Superior

    USGS Publications Warehouse

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

    1965-01-01

    Stomachs were examined from 1,492 lake trout and 83 siscowets collected from Lake Superior. Data are given on the food of lake trout of legal size (17 inches or longer) by year, season, and depth of water, and on the relation between food and size among smaller lake trout. Fish contributed 96.7 to 99.9 per cent of the total volume of food in the annual samples. Ciscoes (Coregonus spp.) were most common (52.2 to 87.5 per cent of the volume) in 1950 to 1953 and American smelt ranked first (65.6 per cent of the volume) in 1963. Cottids were in 8.9 to 12.3 per cent of the stomachs in 1950 to 1953 but in only 4.3 per cent in 1963. Insects ranked second to fish in occurrence (9.6 per cent for the combined samples) and crustaceans followed at 3.9 per cent. The greatest seasonal changes in the food of lake trout were among fish caught at 35 fathoms and shallower. The occurrence of Coregonus increased from 34.6 per cent in February-March to 71.1 per cent in October-December. Smelt were in 76.9 per cent of the stomachs in February-March but in only 2.2 per cent in October-December. Cottids, Mysis relicta, and insects were most common in the July-September collections. Lake trout taken at depths greater than 35 fathoms had eaten a higher percentage of Cottidae and Coregonus than had those captured in shallower water. Smelt, ninespine sticklebacks, Mysis, and insects were more frequent in stomachs of lake trout from less than 35 fathoms. Crustaceans comprised more than 70 per cent of the total volume of food for 4.0- to 7.9-inch lake trout but their importance decreased as the lake trout grew larger. Pontoporeia affinis was the most common in the stomachs of 4.0- to 6.9-inch lake trout and Mysis held first rank at 7.0 to 12.9 inches. Ostracods were important only to 4.0- to 4.9-inch lake trout. As the lake trout became larger, the importance of fish grew from 4.4-per cent occurrence at 5.0 to 5.9 inches to 93.9 per cent at 16.0 to 16.9 inches. Smelt were most commonly eaten by undersize (less than 17 inches) lake trout.

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

    SciTech Connect

    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

    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.

  10. ALGEBRA SUPERIOR II ALGUNAS PROPIEDADES DE LOS N UMEROS NATURALES

    E-print Network

    Geiß, Christof

    ambos casos a que: MP MP MP / MP (una contradicci´on). Fue Bertrand Russell quien en 1901 descubri Russell. Poste- riormente fueron ´el, Zermelo, Hilbert y muchos matem´aticos m´as quienes trataron de

  11. Absence of the superior petrosal veins and sinus: Surgical considerations

    PubMed Central

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

    2015-01-01

    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. PMID:25745589

  12. Electrocautery Superior to Topical Treatments for Precancerous Anal Lesions

    MedlinePLUS

    Electrocautery Superior to Topical Treatments for Precancerous Anal Lesions Summary Results from a randomized clinical trial conducted in Amsterdam suggest that electrocautery is better than topical imiquimod or fluorouracil at treating ...

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

    E-print Network

    Duchaine, Bradley C.

    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

  14. 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...

  15. Nonverbal Communication from Superiors and Peers: Perceived Impact.

    ERIC Educational Resources Information Center

    Zahn, G. Lawrence

    1980-01-01

    Examines the impact of different combinations of verbal, vocal, and facial cues on perceptions of supportiveness and sincerity in communications between superiors and subordinates. Compares this message processing with that in peer relationships. (JMF)

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

    E-print Network

    Waz, P.

    2009-01-01

    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...

  17. 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...

  18. Results from the Texas Pilot Project on Superior Energy Performance 

    E-print Network

    Ferland, K.

    2009-01-01

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

  19. Somatosensory projections to the superior colliculus of the anaesthetized cat.

    PubMed Central

    Abrahams, V C; Clinton, R J; Downey, D

    1988-01-01

    1. Experiments in anaesthetized cats have shown that the superior colliculus receives deep afferent input from the forelimb and hindlimb, but not from the large superficial neck muscles. 2. Neuronal activity in the superior colliculus is readily elicited by electrical stimulation of C2 and C3 cutaneous nerves. A significant proportion of neurones so activated have multiple receptive fields and some with no identifiable receptive fields in regions innervated by C2 and C3 nerves have receptive fields elsewhere on the body surface. Many collicular neurones activated by C2 and C3 stimulation had no identifiable receptive fields. 3. Natural stimuli to the limbs, hitherto believed to activate only cutaneous receptors, are sufficient to activate deep receptors which contribute to the neuronal responses in the superior colliculus elicited by the natural stimulus. These same natural stimuli set up transmitted vibration adequate to excite receptors some distance from the applied stimulus. 4. No evidence was found for a rigorous somatotopy in the superior colliculus. The great majority of neurones received trigeminal input which is widely distributed throughout the superior colliculus. 5. Tactile stimuli to the face are most effective in eliciting unit activity in the superior colliculus and many neurones activated by these stimuli were shown to be tectospinal neurones. In particular, the specialized receptors of the face, including the glabrous skin of the snout (the planum nasale) and the vibrissae, are major sources of input to collicular neurones including tectospinal neurones. 6. It is suggested that a major role of the superior colliculus is in the organization of head movements associated with the use of the specialized receptor organs of the face in exploratory behaviours. The superior colliculus may also be involved in the organization of aversion movements of the head. PMID:3411505

  20. Superior Mesenteric Artery Embolism Treated with Percutaneous Mechanical Thrombectomy

    SciTech Connect

    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

    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.

  1. Phlorotannins of the edible brown seaweed Ecklonia cava Kjellman induce sleep via positive allosteric modulation of gamma-aminobutyric acid type A–benzodiazepine receptor: A novel neurological activity of seaweed polyphenols

    Microsoft Academic Search

    Suengmock Cho; Hyejin Yang; You-Jin Jeon; C. Justin Lee; Young-Ho Jin; Nam-In Baek; Dongsoo Kim; Sung-Myung Kang; Minseok Yoon; Heim Yong; Makoto Shimizu; Daeseok Han

    The primary objective was to investigate whether seaweeds have hypnotic activity. Methanol extracts of 30 seaweeds were screened for their binding activity at the GABA type A–benzodiazepine (GABAA–BZD) receptor, a well-characterised molecular target for sedative–hypnotics. The most active seaweed was Ecklonia cava Kjellman (ECK). An ethanol extract of ECK (ECK-E) significantly potentiated pentobarbital-induced sleep in mice. In four solvent fractions

  2. Unusual morphology of the superior belly of omohyoid muscle.

    PubMed

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

    2014-12-01

    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

  3. Unusual morphology of the superior belly of omohyoid muscle

    PubMed Central

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

    2014-01-01

    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

  4. 40 CFR 81.60 - Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...false Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region...60 Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region. The Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality...

  5. 40 CFR 81.60 - Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...false Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region...60 Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region. The Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality...

  6. 40 CFR 81.60 - Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...false Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region...60 Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region. The Duluth (Minnesota)-Superior (Wisconsin) Interstate Air Quality...

  7. The superior trapezius myocutaneous flap in head and neck reconstruction.

    PubMed

    Aviv, J E; Urken, M L; Lawson, W; Biller, H F

    1992-07-01

    The superior trapezius myocutaneous flap, based on the paraspinous perforating branches of the intercostal vessels, is generally not a first-line choice for reconstruction of head and neck defects. However, after wound breakdown following radical neck dissection and radiation therapy, the superior trapezius flap is extremely reliable for coverage of exposed major neck vessels. The flap was used in 30 patients undergoing lateral neck reconstruction. All 30 patients had undergone prior neck dissection and all but two had undergone prior radiation therapy. There were no flap failures. The superior trapezius flap is unique among other regional myocutaneous flaps presently in use in that it has a superiorly based pedicle, which reduces the problem of gravitational pull on the suture lines of severely unfavorable recipient beds. Another advantage of using the denervated muscle of this flap is that it imposes no additional functional loss. The deficiencies of this flap are primarily related to its limited arc of rotation, thereby precluding its use when resurfacing defects that extend beyond the midline of the neck. The reliability of the superior trapezius flap after neck dissection can be explained by the angiosome concept. Based on that concept, previous ligation of the transverse cervical vessels during a neck dissection serves to simultaneously stage this flap, thereby improving its reliability and potential surface area available. PMID:1627289

  8. Temporal Bone Fracture Causing Superior Semicircular Canal Dehiscence

    PubMed Central

    Peng, Kevin A.; Yang, Isaac; Gopen, Quinton

    2014-01-01

    Importance. Superior semicircular canal dehiscence (SCD) is a third window lesion of the inner ear causing symptoms of vertigo, autophony, tinnitus, and hearing loss. A “two-hit” hypothesis has traditionally been proposed, whereby thinly developed bone overlying the superior canal is disrupted by a sudden change in intracranial pressure. Although the symptoms of SCD may be precipitated by head injury, no previous reports have described a temporal bone fracture directly causing SCD. Observations. Two patients sustained temporal bone fractures after closed head trauma, and developed unilateral otologic symptoms consistent with SCD. In each instance, computed tomography imaging revealed fractures extending through the bony roof of the superior semicircular canal. Conclusions and Relevance. Temporal bone fractures, which are largely treated nonoperatively, have not previously been reported to cause SCD. As it is a potentially treatable entity, SCD resulting from temporal bone fracture must be recognized as a possibility and diagnosed promptly if present. PMID:25295207

  9. Isolated abscess in superior rectus muscle in a child

    PubMed Central

    Bhalerao, Sushank Ashok; Singh, Kamaljeet; Yadav, Birendra; Kumar, Ravindra

    2015-01-01

    Pyomyositis is a primary bacterial infection of striated muscles nearly always caused by Staphylococcus aureus. Development of the intramuscular abscess involving the extra-ocular muscles (EOMs) remains an extremely rare process. We herein present a case of isolated EOM pyomyositis involving superior rectus muscle in a 2-year male child who was referred with complaints of swelling in left eye (LE) and inability to open LE since last 1-month. Orbital computed tomography (CT) scan showed a well-defined, hypo-dense, peripheral rim-enhancing lesion in relation to left superior rectus muscle suggestive of left superior rectus abscess. The abscess was drained through skin approach. We concluded that pyomyositis of EOM should be considered in any patient presenting with acute onset of orbital inflammation and characteristic CT or magnetic resonance imaging features. Management consists of incision and drainage coupled with antibiotic therapy. PMID:25971183

  10. Neurocognitive Decrements are Present in Intellectually Superior Schizophrenia

    PubMed Central

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

    2014-01-01

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

  11. U IVERSIDAD AUT OMA DE MADRID ESCUELA POLITEC ICA SUPERIOR

    E-print Network

    Autonoma de Madrid, Universidad

    estudio de los distintos casos se ha usado la herramienta VPI transmisión maker. . Palabras clave: OSNR, BER, �ptico, PMD, CD, VPI transmission maker #12;5 Abstract: We present a study about the different is known beforehand and thus the link is fully characterized. In order to perform such project, VPI

  12. Cochlear implant outcomes in patients with superior canal dehiscence.

    PubMed

    Puram, Sidharth V; Roberts, Daniel S; Niesten, Marlien E F; Dilger, Amanda E; Lee, Daniel J

    2013-11-25

    Objective To determine whether adult cochlear implant (CI) users with superior canal dehiscence syndrome (SCDS) or asymptomatic superior semicircular canal dehiscence (SCD) have different surgical, vestibular, and audiologic outcomes when compared to CI users with normal temporal bone anatomy. Methods A retrospective single institution review of CI users with either superior semicircular canal dehiscence syndrome or asymptomatic superior semicircular canal dehiscence identified eight post-lingually deafened adults with unilateral or bilateral cochlear implantation between 2006 and 2010. Preoperative and postoperative speech perception scores as well as medical and epidemiological data were recorded and analyzed. Results One patient with superior canal dehiscence syndrome and seven patients with asymptomatic superior semicircular canal dehiscence were identified, representing 7% or 8/113 of CI patients that fulfilled selection criteria. Average dehiscence length was 3.3 mm ± 0.79 SEM. Three patients received bilateral implants and five patients received a unilateral implant. Among asymptomatic superior semicircular canal dehiscence patients, subjective rates of post-operative dizziness were similar to those seen in patients with normal temporal bone anatomy (12.5 % vs. 15.9%, respectively). Speech perception abilities after surgery were poorer in SCD patients compared to the non-SCD cohort (Consonant Nucleus Consonant 33.7 ± 7.78 SEM vs. 56.7 ± 2.15 SEM P = 0.011), although both groups improved substantially relative to pre-operative performance. We also completed detailed analyses of auditory and vestibular outcomes in one patient with SCDS who underwent CI surgery in the symptomatic ear, which demonstrated preservation of vestibular function post-operatively, improved quality-of-life measures, and reduced dizziness symptomatology. Conclusions Our data suggest that patients with asymptomatic superior canal dehiscence at the time of CI surgery have similar albeit decreased speech perception scores compared to non-SCD adult CI users. Subjective rate of dizziness or vertigo following CI surgery was similar in both asymptomatic SCD and non-SCD cohorts, with detailed analyses of a single symptomatic SCD patient revealing improved vestibular function and reduced SCD symptoms following CI. PMID:24074366

  13. [Superior colliculus as a subcortical center for visual selection].

    PubMed

    Zénon, Alexandre; Krauzlis, Rich

    2014-01-01

    Our visual system has limited resources, which need to be allocated in priority to the most relevant elements of the environment. The brain centers of this allocation mechanism, called visual attention, have been studied primarily in cortex. In this review, we describe the role of the superior colliculus, a structure of the brainstem, in attention control. This nucleus exerts its influence on visual selection independently of cortical attentional mechanisms. The exact nature of the subcortical circuits involved remains unknown but it can be hypothesized that the loop connecting the superior colliculus to the basal ganglia are a central actor of this subcortical selection process. PMID:25014454

  14. Superior Semicircular Canal Dehiscence Syndrome without Vestibular Symptoms

    PubMed Central

    Teixeira, Emidio Oliveira; Fonseca, Marconi Teixeira

    2013-01-01

    Introduction?Superior semicircular canal dehiscence syndrome is mainly characterized by vestibular symptoms induced by intense sound stimuli or pressure changes, which occur because of dehiscence of the bony layer covering the superior semicircular canal. Case Report?Here, we report a case of the syndrome with pulsatile tinnitus and ear fullness, in the absence of vestibular symptoms. Discussion?Signs and symptoms of the syndrome are rarely obvious, leading to the requirement for a minimum workup to rule out or make diagnosis more probable and thus avoid misconduct. PMID:25992092

  15. Superior Semicircular Canal Dehiscence Syndrome without Vestibular Symptoms.

    PubMed

    Teixeira, Emidio Oliveira; Fonseca, Marconi Teixeira

    2014-04-01

    Introduction?Superior semicircular canal dehiscence syndrome is mainly characterized by vestibular symptoms induced by intense sound stimuli or pressure changes, which occur because of dehiscence of the bony layer covering the superior semicircular canal. Case Report?Here, we report a case of the syndrome with pulsatile tinnitus and ear fullness, in the absence of vestibular symptoms. Discussion?Signs and symptoms of the syndrome are rarely obvious, leading to the requirement for a minimum workup to rule out or make diagnosis more probable and thus avoid misconduct. PMID:25992092

  16. Surgical approach to the superior vestibular nerve in guinea pigs.

    PubMed

    Hildesheimer, M; Muchnik, C; Rubinstein, M

    1987-12-01

    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

  17. Superior mesenteric vein thrombosis after laparoscopic sleeve gastrectomy.

    PubMed

    Pineda, Lucas; Sarhan, Mohammad; Ahmed, Leaque

    2013-08-01

    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

  18. 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...

  19. Effect of bilateral superior oblique split lengthening on torsion

    PubMed Central

    Jethani, Jitendra; Shah, Kuntal; Amin, Sonal

    2015-01-01

    Introduction: Superior oblique split lengthening (SOSL) is done for weakening of superior oblique. It corrects the superior oblique overaction (SOOA) and A pattern. Its effect on the torsion of the eye is not known. We present our data on the effect of this particular procedure on torsion. Materials and Methods: We did a study of 16 patients (32 eyes) who underwent bilateral SOSL and compared the disc foveal angle (DFA) preoperatively and postoperatively. The split lengthening was done from 4 mm to 7 mm depending upon the overaction of superior oblique. Results: The mean age was 15.3 ± 8.4 years. Mean preoperative DFA in the right eye (RE) was ?3.9° and in the left eye (LE) was ?2.9°. Mean postoperative DFA in RE was 0.2° and in LE was 0.9°. The mean change in the DFA for RE was 4.1° ± 1.3° and for LE was 3.8° ± 1.2°. All the patients were aligned horizontally within 6 prism diopter and no pattern and no diplopia postoperatively. The A pattern was corrected in all the patient postsurgery. For each mm of surgery, an improvement of 0.8° was seen in the DFA. Conclusion: We report the effect of SOSL on torsion. The SOSL reduces intorsion postsurgery and is, therefore, a valuable procedure in SOOA where both pattern and in torsion needs to be corrected. PMID:25971171

  20. Análisis Econónico de la política en educación superior en Chile

    Microsoft Academic Search

    Pablo González

    2000-01-01

    El artículo presenta una descripción de las políticas, logros y problemas de la educación superior en Chile en los últimos veinte años. Desde los ochenta se ha fomentado el autofinanciamiento de la docencia, complementado con un sistema de crédito contingente a ingresos y un sistema de crédito privado con seguro público, que ha permitido que Chile sea uno de los

  1. 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...

  2. Cationic amphiphilic non-hemolytic polyacrylates with superior antibacterial activity.

    PubMed

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

    2014-07-01

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

  3. Superiority and Complexity of the Spaced Seeds Louxin Zhang

    E-print Network

    Zhang, Louxin

    Superiority and Complexity of the Spaced Seeds Ming Li Bin Ma Louxin Zhang Abstract Optimal spaced seeds were introduced by the theoretical computer science community to bioinformatics to effectively. While dozens of papers have been published on optimal spaced seeds since their invention, many

  4. 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...

  5. 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

  6. UNIVERSIDAD NACIONAL AUTNOMA DE MXICO FACULTAD DE ESTUDIOS SUPERIORES ARAGN

    E-print Network

    Islas, León

    Sistemas y Servicios de Cómputo, invita a usted a que se inscriba en cualquiera de los siguientes cursos:00 Sábado 2 al 23 de Junio del 2012 Elaboración de Modelos Arquitectónicos 09:00 a 14:00 Introducción a la SUPERIORES ARAGÓN La Unidad de Sistemas y Servicios de Cómputo, invita a usted a que se inscriba en

  7. Superior Performance of HIS-SelectTM HF Nickel

    E-print Network

    Lebendiker, Mario

    Superior Performance of HIS-SelectTM HF Nickel Affinity Gel By John Dapron, Michael Harvey, Heidi by immobilized metal affinity chromatography (IMAC), using nickel as the affinity ligand. Sigma-Aldrich has been expanding its line of specialty HIS-Select nickel chelate affinity media to meet the varied needs

  8. Anatomo-radiological study of the Superior Semicircular Canal Dehiscence

    Microsoft Academic Search

    M. Crovetto; J. Whyte; O. M. Rodriguez; I. Lecumberri; C. Martinez; J. Eléxpuru

    2010-01-01

    IntroductionThe main purpose of this study is to determine the radiological incidence of Superior (SSCD) and Posterior Semicircular Canal Dehiscence (PSCD) and to compare radiologic SSCD to the incidence of this condition on cadaver specimen. We have also analysed the relation between the ossification state of the semicircular canals and the degree of mastoid pneumatization and integrity of Tegmen Tympani.

  9. Superior Thermal Conductivity of Single-Layer Graphene

    E-print Network

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

  10. 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...

  11. 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...

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

    E-print Network

    Rondenay, Stephane

    velocities in the western Superior (WS) from low velocities in the east and coinciding with the divide or plume activity. These models have different implications for the age of the continental lithosphere the degree to which they correlate with crustal terranes. [3] The high seismic velocity of stable continental

  13. Canine tooth syndrome due to superior oblique myocysticercosis.

    PubMed

    Pandey, Pramod Kumar; Bhatia, Amit; Garg, Deepali; Singh, Rashmi

    2006-01-01

    A 13-year-old boy had right periocular pain, upgaze vertical diplopia, and lid swelling. Right extorsion and hypodense cystic swelling in the right superior oblique involving the muscle and tendon behind the trochlea existed. Oral treatment was prescribed. MRI revealed a collapsed cyst. Ocular motility improved, but levoelevation diplopia persisted. PMID:16761645

  14. 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 ...

  15. Why Is Visual Search Superior in Autism Spectrum Disorder?

    ERIC Educational Resources Information Center

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

    2009-01-01

    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…

  16. 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...

  17. 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...

  18. Uncovering the Structure of a Memorist's Superior ''Basic'' Memory Capacity

    ERIC Educational Resources Information Center

    Ericsson, K. Anders; Delaney, Peter F.; Weaver, George; Mahadevan, Rajan

    2004-01-01

    After extensive laboratory testing of the famous memorist Rajan, Thompson, Cowan, and Frieman (1993) proposed that he was innately endowed with a superior memory capacity for digits and letters and thus violated the hypothesis that exceptional memory fully reflects acquired ''skilled memory.'' We successfully replicated the empirical phenomena…

  19. Behavior evoked by electrical stimulation of the hamster superior colliculus

    Microsoft Academic Search

    D. P. M. Northmore; E. S. Levine; G. E. Schneider

    1988-01-01

    Syrian golden hamsters were implanted with fixed or moveable stimulating electrodes aimed at the superior colliculus (SC). Behavior was observed in response to trains of 0.1 ms pulses at 200 Hz while the animals were moving freely in an open arena or in their home cages. At threshold stimulating currents, the responses consisted almost entirely of freezing or contraversive turning,

  20. Causal mechanisms of the deep chlorophyll maximum in Lake Superior: A numerical modeling investigation

    E-print Network

    Matsumoto, Katsumi

    Superior. In a survey of summertime vertical chlorophyll distribution at 19 offshore sites in Lake SuperiorCausal mechanisms of the deep chlorophyll maximum in Lake Superior: A numerical modeling Keywords: Lake superior Deep chlorophyll maximum Numerical modeling The deep chlorophyll maximum (DCM

  1. Complex Adaptive Systems of Systems (CASOS) engineering environment.

    SciTech Connect

    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

    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.

  2. Total variation superiorization schemes in proton computed tomography image reconstruction

    PubMed Central

    Penfold, S. N.; Schulte, R. W.; Censor, Y.; Rosenfeld, A. B.

    2010-01-01

    Purpose: Iterative projection reconstruction algorithms are currently the preferred reconstruction method in proton computed tomography (pCT). However, due to inconsistencies in the measured data arising from proton energy straggling and multiple Coulomb scattering, the noise in the reconstructed image increases with successive iterations. In the current work, the authors investigated the use of total variation superiorization (TVS) schemes that can be applied as an algorithmic add-on to perturbation-resilient iterative projection algorithms for pCT image reconstruction. Methods: The block-iterative diagonally relaxed orthogonal projections (DROP) algorithm was used for reconstructing GEANT4 Monte Carlo simulated pCT data sets. Two TVS schemes added on to DROP were investigated; the first carried out the superiorization steps once per cycle and the second once per block. Simplifications of these schemes, involving the elimination of the computationally expensive feasibility proximity checking step of the TVS framework, were also investigated. The modulation transfer function and contrast discrimination function were used to quantify spatial and density resolution, respectively. Results: With both TVS schemes, superior spatial and density resolution was achieved compared to the standard DROP algorithm. Eliminating the feasibility proximity check improved the image quality, in particular image noise, in the once-per-block superiorization, while also halving image reconstruction time. Overall, the greatest image quality was observed when carrying out the superiorization once per block and eliminating the feasibility proximity check. Conclusions: The low-contrast imaging made possible with TVS holds a promise for its incorporation into future pCT studies. PMID:21158301

  3. Bioaccumulation of toxaphene congeners in the lake superior food web

    USGS Publications Warehouse

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

    2004-01-01

    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.

  4. Measurement of inferior vena cava diameter for evaluation of venous return in subjects on day 10 of a bed-rest experiment.

    PubMed

    Ishizaki, Yuko; Fukuoka, Hideoki; Ishizaki, Tatsuro; Kino, Minoru; Higashino, Hirohiko; Ueda, Nobuo; Fujii, Yuri; Kobayashi, Yohnosuke

    2004-06-01

    We evaluated the usefulness of measurements of the inferior vena cava (IVC) diameters on abdominal echograms as an indicator of changes of venous return in subjects with orthostatic intolerance (OI) induced by simulated microgravity. We performed a standing test and recorded the IVC diameters on abdominal echograms in 12 subjects placed on a 20-day 6 degrees head-down-tilt bed-rest experiment. We found that different patterns of changes in IVC diameter occurred in the standing test on day 10 of the experiment; in five subjects with a marginal decrease in pulse pressure, IVC diameters in the upright position were markedly decreased compared with those in the supine position. In five subjects with feelings of discomfort, the IVC diameters in the upright position distended or did not decrease from those in the supine position. These results suggested that the changes in IVC diameter on the standing test indicated the presence of various types of hemodynamic responses of OI caused by simulated microgravity. In this study, we also evaluated changes in body-water compartments by conducting multifrequency bioelectrical impedance analysis. Longitudinal data analysis showed that the total body-water-to-fat-free mass and extracellular fluid-to-fat-free mass ratios decreased during the experimental period and recovered thereafter, and that the ratio of intracellular fluid to fat-free mass decreased during the experiment. No significant difference in changes in body-water compartments was seen among subjects with different patterns of changes in IVC diameters. Measurement of IVC diameter was useful to estimate hemodynamic changes in subjects with OI. PMID:14990554

  5. Assessment of healthcare quality metrics: Length-of-stay, 30-day readmission, and 30-day mortality for radical nephrectomy with inferior vena cava thrombectomy

    PubMed Central

    Hwang, Y. Joseph; Minnillo, Brian J.; Kim, Simon P.; Abouassaly, Robert

    2015-01-01

    Introduction: Length-of-stay (LOS), 30-day readmission, and 30-day mortality are metrics used to assess quality of care and provider reimbursement. Therefore, we investigated patient- and hospital-level characteristics associated with the three healthcare quality metrics for radical nephrectomy with inferior vena cava (IVC) thrombectomy. Methods: Using the National Cancer Data Base, we established a cohort of patients who received radical nephrectomy following the diagnosis of renal cell carcinoma (RCC) stage cT3b between 1998 and 2011. We then assessed the associations between patient- or hospital-level characteristics and LOS using multivariable negative binomial regression. We used multivariable logistic regression to determine the associations between the characteristics and 30-day readmission or 30-day mortality. Results: During the study period, 5768 patients were diagnosed with RCC stage cT3b and underwent radical nephrectomy. LOS ?2 days and ?9 days were associated with a higher likelihood of 30-day readmission (respective odds ratio [OR] 1.61 and 1.58) and 30-day mortality (respective OR 11.62 and 11.87). Older patients (60–79 years vs. <50 years) were less likely to experience 30-day readmission (OR 0.46–0.52). Older patients (?80 years vs. <50 years, OR 3.67) and patients with a high index of comorbidity (Charlson comorbidity score ? 2 vs. 0, OR 1.95) were more likely to suffer 30-day mortality. Conclusions: LOS is an important predictor of short-term readmission and mortality following radical nephrectomy with IVC thrombectomy. Older age and a high index of comorbidity also predict short-term mortality after the surgery.

  6. MESTRADO EM MICROBIOLOGIA GENMICA FUNCIONAL E COMPARATIVA Instituto Superior Tcnico

    E-print Network

    Instituto de Sistemas e Robotica

    MESTRADO EM MICROBIOLOGIA GEN�MICA FUNCIONAL E COMPARATIVA ­ Instituto Superior Técnico Objectivos Genómica Funcional e Comparativa, bem como a sua aplicação ao estudo da biologia à escala do genoma, numa. Metodologias experimentais para o estudo da regulação da expressão genética e genómica. 4. Genómica funcional

  7. Visual sampling after lesions of the superior colliculus in rats

    Microsoft Academic Search

    A. David Milner; Melvyn A. Goodale; Margaret C. Morton

    1979-01-01

    In 2 experiments with 20 male black-hooded rats, Ss with bilateral lesions of the superior colliculus showed significantly poorer relearning of a horizontal\\/vertical stripe discrimination than control Ss. In Exp I, all Ss showed disruption of performance when a stimulus–response (S–R) separation was introduced by raising the stimuli above the site of responding. However, colliculectomized Ss were much more disturbed

  8. Ocular vestibular evoked myogenic potentials in superior canal dehiscence

    Microsoft Academic Search

    S M Rosengren; S T Aw; G M Halmagyi; N P McAngus Todd; J G Colebatch

    2008-01-01

    Objective:Patients with superior canal dehiscence (SCD) have large sound-evoked vestibular reflexes with pathologically low threshold. We wished to determine whether a recently discovered measure of the vestibulo-ocular reflex—the ocular vestibular evoked myogenic potential (OVEMP)—produced similar high-amplitude, low-threshold responses in SCD, and could differentiate patients with SCD from normal control patients.Methods:Nine patients with CT-confirmed SCD and 10 normal controls were stimulated

  9. Pseudoaneurysm of the superior thyroid artery following revision tracheostomy.

    PubMed

    Lin, Harrison W; Reilly, Brian K

    2012-07-01

    This case report describes the presentation and management of a rare complication of pseudoaneurysm of the superior thyroid artery following tracheostomy. The majority of post-tracheostomy bleeding is managed either with packing or surgical re-exploration. However, angiography can pinpoint an arterial source of bleeding and allow the surgeon to address it via either a traditional open surgical approach or with minimally invasive endovascular embolization. PMID:22532258

  10. Superior Canal Dehiscence Size: Multivariate Assessment of Clinical Impact

    PubMed Central

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

    2013-01-01

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

  11. Characteristics and Management of Superior Semicircular Canal Dehiscence

    PubMed Central

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

    2012-01-01

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

  12. Prey selection by the Lake Superior fish community

    USGS Publications Warehouse

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

    2012-01-01

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

  13. Methyl mercury in Lake Superior: Offshore processes and bioaccumulation

    NASA Astrophysics Data System (ADS)

    Hurley, J. P.; Manolopoulos, H.; Babiarz, C. L.; Sakamoto, H.; Rolfhus, K. R.; Back, R. C.; Shafer, M. M.; Armstrong, D. E.; Harris, R.

    2003-05-01

    The effects of watershed type exert a strong influence on the speciation of mercury and the delivery of mercury to Lake Superior nearshore waters. As a consequence, tributary mixing zones are important locations for enhanced bioaccumulation in Lake Superior. Methyl Hg (MeHg) bioaccumulation, however, is also observed in regions of the lake that are remote from tributary influences. Three cruises aboard the USEPA vessel R/VLake Guardian on Lake Superior revealed that offshore concentrations of total mercury (HgT) were low, similar to Lake Michigan and oceanic waters (0.21 1.0 ng L^{-1} HgT). During August 2000, MeHg averaged 3.0 12.6 pg L-, at least an order of magnitude lower than most tributaries during typical flow régimes. Despite these differences, initial comparisons of phytoplankton revealed only a two to threefold enrichment of MeHg in tributary mixing zones versus offshore regions. MeHg inputs to the open waters of the lake are dependent on three processes: mixing from nearshore zones, direct atmospheric inputs and MeHg diffusion from sediments. Direct sedimentary methylation rates are extremely low and modeling efforts suggest that photodegradation would eliminate tributaryderived MeHg. Therefore, we conclude that atmospheric sources strongly influence MeHg uptake in offshore zones. A detailed profile at a deep-lake station in August 2001 suggests enhanced bioaccumulation at a subsurface chlorophyll maximum, in a zone with close contact to atmospheric fluxes.

  14. 33 CFR 117.661 - Duluth Ship Canal (Duluth-Superior Harbor).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 2010-07-01 false Duluth Ship Canal (Duluth-Superior Harbor). 117... Minnesota § 117.661 Duluth Ship Canal (Duluth-Superior Harbor). The draw of the Duluth Ship Canal bridge, mile 0.1 at Duluth,...

  15. The ICLS system results in superior energy savings. The chart (right)

    E-print Network

    The ICLS system results in superior energy savings. The chart (right) shows the yearly energy Luminaire #12;The ICLS system results in superior energy savings. The chart (right) shows the yearly energy

  16. Superior cell penetration by a rigid and anisotropic synthetic protein.

    PubMed

    Nakayama, Norihisa; Hagiwara, Kyoji; Ito, Yoshihiro; Ijiro, Kuniharu; Osada, Yoshihito; Sano, Ken-Ichi

    2015-03-10

    Molecules with structural anisotropy and rigidity, such as asbestos, demonstrate high cell-penetrating activity but also high toxicity. Here we synthesize a biodegradable, rigid, and fibrous artificial protein, CCPC 140, as a potential vehicle for cellular delivery. CCPC 140 penetrated 100% of cells tested in vitro, even at a concentration of 3.1 nM-superior to previously reported cell-penetrating peptides. The effects of cell-strain-dependency and aspect ratio on the cell-penetrating activity of CCPC 140 were also investigated. PMID:25710086

  17. Seismic structure of superior-churchill precambrian boundary zone

    SciTech Connect

    Delandro, W.; Moon, W.

    1982-08-10

    Two reversed refraction/wide-angle reflection profiles obtained across the Nelson Front by CONCRUST (77) group are interpreted in detail. The results indicate that the Moho beneath the boundary zone between the Superior and churhill provinces dips down toward the west and there exists a complicated lateral seismic structure in the upper crustal and midcrustal depths. The ray tracig results also indicate that there may exist a zone of negative velocity gradient along the boundary zone at the depth range of 4-13 km.

  18. Extrapleural pneumonectomy complicated by acute superior mesenteric artery syndrome.

    PubMed

    DuBray, Bernard J; Gnerlich, Jennifer L; Doyle, Maria B Majella; Patterson, G Alexander

    2012-07-01

    We present a patient who developed an acute superior mesenteric artery (SMA) syndrome following pneumonectomy. Although rarely described, a majority of cases develop insidiously from a gradual loss of retroperitoneal fat in the setting of malnourishment. A postoperative presentation is atypical, however procedures that narrow the aortomesenteric angle have been associated with the development of SMA syndrome. This case illustrates an important anatomic relationship that thoracic surgeons performing lung resection surgery should be aware of in order to avoid predisposing patients to SMA syndrome. PMID:22734999

  19. Superior canal dehiscence: review of a new condition.

    PubMed

    Banerjee, A; Whyte, A; Atlas, M D

    2005-02-01

    A new cause of sound and pressure induced vertigo, superior canal dehisence, is described. Auditory manifestations include hyperacusis to bone-conducted sounds and conductive hearing loss with normal acoustic reflexes. The diagnosis is reached by a directed history, documentation of upward and torsional nystagmus evoked by sound and pressure, and radiology. Acoustic reflexes and VEMP (vestibular evoked myogenic potentials) aid in the identification of patients with an apparent conductive loss with normal acoustic reflexes or have an asymptomatic dehiscense on radiology. Treatment involves avoidance of the precipitating stimuli. Surgical treatment, by resurfacing the dehiscence, is considered in patients with more severe symptoms. PMID:15748182

  20. Life history of lake herring in Lake Superior

    USGS Publications Warehouse

    Dryer, William R.; Beil, Joseph

    1964-01-01

    The average annual commercial catch of lake herring (Coregonus artedi) in U.S. waters of Lake Superior was nearly 12 million pounds in 1929-61. This production contributed 62.4 percent of the total U.S. take of lake herring for the Great Lakes. About 90 percent of the annual catch is taken from small-mesh gill nets during the November-December spawning season. The life-history studies were based on 12,187 fish collected in 1950-62; past growth was computed for 3,779 specimens collected from commercial landings at: Duluth, Minn.; Bayfield, Wis.; and Portage Entry and Marquette, Mich.

  1. Research on the Evaluation of Information Superiority in Near Space Information System

    Microsoft Academic Search

    Canbin Zhu; Jian Cheng; Xiaonan Li; Yu Lei

    2009-01-01

    In informational war, information has become the dominant factor of battlefield. It is the key of winning a battle obtaining information superiority. To meet the characteristic of near space information system, fix an information superiority evaluation method by using the contrast of perceptive situational quality. The measurement of information superiority is presented with three guidelines, which are completeness, accuracy, and

  2. Nearshore Versus Offshore Copper Loading in Lake Superior Sediments: Implications for Transport and Cycling

    Microsoft Academic Search

    Jonathan J. Kolak; David T. Long; W. Charles Kerfoot; Tina M. Beals; Steven J. Eisenreich

    1999-01-01

    A thorough understanding of the fate and transport of metals in Lake Superior is necessary in order to predict the ability of Lake Superior to recover from anthropogenic perturbations (copper mining). Sediment cores were collected from nearshore and offshore sites in Lake Superior and used to evaluate spatial and temporal variations in copper loading associated with mining-related activities. Although both

  3. Seeking information superiority: strategies for business in the commercial application of information operations

    Microsoft Academic Search

    Martin Dart

    2005-01-01

    Information superiority is a condition that many businesses attempt to attain without truly understanding what it is, or how to get there. This paper presents an overview to help businesspeople recognize the road to information superiority, and some of the essential strategies to implement along the way. Information operations is a concept described to enable information superiority, when used with

  4. Políticas económicas regionales: cuatro estudios de caso

    Microsoft Academic Search

    Gerson Javier Pérez V; Peter Rowland

    2004-01-01

    Este documento presenta el estudio de cuatro casos con políticas regionales bien desarrolladas, que incluyen a la Unión Europea, España, Italia y Brasil. Estos fueron seleccionados debido a su relevancia para el análisis de problemas regionales en Colombia. En todos ellos, las políticas regionales han tenido resultados relativamente limitados, pues las disparidades regionales no han disminuido en forma significativa. No

  5. Visual sensitivity of deepwater fishes in lake superior.

    PubMed

    Harrington, Kelly A; Hrabik, Thomas R; Mensinger, Allen F

    2015-01-01

    The predator-prey interactions in the offshore food web of Lake Superior have been well documented, but the sensory systems mediating these interactions remain unknown. The deepwater sculpin, (Myoxocephalus thompsoni), siscowet (Salvelinus namaycush siscowet), and kiyi (Coregonus kiyi) inhabit low light level environments. To investigate the potential role of vision in predator-prey interactions, electroretinography was used to determine visual sensitivity for each species. Spectral sensitivity curves revealed peak sensitivity at 525 nm for each species which closely corresponds to the prevalent downwelling light spectrum at depth. To determine if sufficient light was available to mediate predator-prey interactions, visual sensitivity was correlated with the intensity of downwelling light in Lake Superior to construct visual depth profiles for each species. Sufficient daytime irradiance exists for visual interactions to approximately 325 m for siscowet and kiyi and 355 m for the deepwater sculpin during summer months. Under full moon conditions, sufficient irradiance exists to elicit ERG response to light available at approximately 30 m for the siscowet and kiyi and 45 m for the deepwater sculpin. Visual interactions are therefore possible at the depths and times when these organisms overlap in the water column indicating that vision may play a far greater role at depth in deep freshwater lakes than had been previously documented. PMID:25646781

  6. A new look at the Lake Superior biomass size spectrum

    USGS Publications Warehouse

    Yurista, Peder M.; Yule, Daniel L.; Balge, Matt; VanAlstine, Jon D.; Thompson, Jo A.; Gamble, Allison E.; Hrabik, Thomas R.; Kelly, John R.; Stockwell, Jason D.; Vinson, Mark

    2014-01-01

    We synthesized data from multiple sampling programs and years to describe the Lake Superior pelagic biomass size structure. Data consisted of Coulter counts for phytoplankton, optical plankton counts for zooplankton, and acoustic surveys for pelagic prey fish. The size spectrum was stable across two time periods separated by 5 years. The primary scaling or overall slope of the normalized biomass size spectra for the combined years was ?1.113, consistent with a previous estimate for Lake Superior (?1.10). Periodic dome structures within the overall biomass size structure were fit to polynomial regressions based on the observed sub-domes within the classical taxonomic positions (algae, zooplankton, and fish). This interpretation of periodic dome delineation was aligned more closely with predator–prey size relationships that exist within the zooplankton (herbivorous, predacious) and fish (planktivorous, piscivorous) taxonomic positions. Domes were spaced approximately every 3.78 log10 units along the axis and with a decreasing peak magnitude of ?4.1 log10 units. The relative position of the algal and herbivorous zooplankton domes predicted well the subsequent biomass domes for larger predatory zooplankton and planktivorous prey fish.

  7. Superior Cross-Species Reference Genes: A Blueberry Case Study

    PubMed Central

    Die, Jose V.; Rowland, Lisa J.

    2013-01-01

    The advent of affordable Next Generation Sequencing technologies has had major impact on studies of many crop species, where access to genomic technologies and genome-scale data sets has been extremely limited until now. The recent development of genomic resources in blueberry will enable the application of high throughput gene expression approaches that should relatively quickly increase our understanding of blueberry physiology. These studies, however, require a highly accurate and robust workflow and make necessary the identification of reference genes with high expression stability for correct target gene normalization. To create a set of superior reference genes for blueberry expression analyses, we mined a publicly available transcriptome data set from blueberry for orthologs to a set of Arabidopsis genes that showed the most stable expression in a developmental series. In total, the expression stability of 13 putative reference genes was evaluated by qPCR and a set of new references with high stability values across a developmental series in fruits and floral buds of blueberry were identified. We also demonstrated the need to use at least two, preferably three, reference genes to avoid inconsistencies in results, even when superior reference genes are used. The new references identified here provide a valuable resource for accurate normalization of gene expression in Vaccinium spp. and may be useful for other members of the Ericaceae family as well. PMID:24058469

  8. Neural underpinnings of superior action prediction abilities in soccer players.

    PubMed

    Makris, Stergios; Urgesi, Cosimo

    2015-03-01

    The ability to form anticipatory representations of ongoing actions is crucial for effective interactions in dynamic environments. In sports, elite athletes exhibit greater ability than novices in predicting other players' actions, mainly based on reading their body kinematics. This superior perceptual ability has been associated with a modulation of visual and motor areas by visual and motor expertise. Here, we investigated the causative role of visual and motor action representations in experts' ability to predict the outcome of soccer actions. We asked expert soccer players (outfield players and goalkeepers) and novices to predict the direction of the ball after perceiving the initial phases of penalty kicks that contained or not incongruent body kinematics. During the task, we applied repetitive transcranial magnetic stimulation (rTMS) over the superior temporal sulcus (STS) and the dorsal premotor cortex (PMd). Results showed that STS-rTMS disrupted performance in both experts and novices, especially in those with greater visual expertise (i.e. goalkeepers). Conversely, PMd-rTMS impaired performance only in expert players (i.e. outfield players and goalkeepers), who exhibit strong motor expertise into facing domain-specific actions in soccer games. These results provide causative evidence of the complimentary functional role of visual and motor action representations in experts' action prediction. PMID:24771282

  9. Visual Sensitivity of Deepwater Fishes in Lake Superior

    PubMed Central

    Harrington, Kelly A.; Hrabik, Thomas R.; Mensinger, Allen F.

    2015-01-01

    The predator-prey interactions in the offshore food web of Lake Superior have been well documented, but the sensory systems mediating these interactions remain unknown. The deepwater sculpin, (Myoxocephalus thompsoni), siscowet (Salvelinus namaycush siscowet), and kiyi (Coregonus kiyi) inhabit low light level environments. To investigate the potential role of vision in predator-prey interactions, electroretinography was used to determine visual sensitivity for each species. Spectral sensitivity curves revealed peak sensitivity at 525 nm for each species which closely corresponds to the prevalent downwelling light spectrum at depth. To determine if sufficient light was available to mediate predator-prey interactions, visual sensitivity was correlated with the intensity of downwelling light in Lake Superior to construct visual depth profiles for each species. Sufficient daytime irradiance exists for visual interactions to approximately 325 m for siscowet and kiyi and 355 m for the deepwater sculpin during summer months. Under full moon conditions, sufficient irradiance exists to elicit ERG response to light available at approximately 30 m for the siscowet and kiyi and 45 m for the deepwater sculpin. Visual interactions are therefore possible at the depths and times when these organisms overlap in the water column indicating that vision may play a far greater role at depth in deep freshwater lakes than had been previously documented. PMID:25646781

  10. Phonological Repetition-Suppression in Bilateral Superior Temporal Sulci

    PubMed Central

    Vaden, Kenneth I.; Muftuler, L. Tugan; Hickok, Gregory

    2009-01-01

    Evidence has accumulated that posterior superior temporal sulcus (STS) is critically involved in phonological processing during speech perception, although there are conflicting accounts regarding the degree of lateralization. The current fMRI experiment aimed to identify phonological processing during speech perception through repetition-suppression effects. Repetition-suppression occurs when brain activity decreases from repetitive presentation of stimulus characteristics, in regions of cortex that process those characteristics. We manipulated the degree of phonological repetition among words in short lists to obtain systematic decreases in brain response, indicative of phonological processing. The fMRI experiment presented seventeen participants with recorded wordlists, of low, medium, or high phonological repetition, defined by how many phonemes were shared among words. Bilaterally, middle STS demonstrated activity differences consistent with our prediction of repetition-suppression, as responses decreased systematically with each increase in phonological repetition. Phonological repetition-suppression in bilateral STS converges with neuroimaging evidence for phonological processing, and word deafness resulting from bilateral superior temporal lesions. PMID:19651222

  11. Douglass Houghton and the Precambrian of Lake Superior

    SciTech Connect

    Merk, G.

    1985-01-01

    The first chronological subdivision of Precambrian rocks in the Lake Superior area was made in 1841 by Douglass Houghton for the Upper Peninsula of Michigan. In spite of the fact that the then prevailing philosophy of geologic history was quite different from that of today, Houghton's chronological subdivision became the commonly accepted framework for Precambrian studies on the south shore of Lake Superior. Using only megascopic rock analyses and the physical stratigraphic criteria of relative age, Houghton and his assistants recognized these division, in ascending order: the Primary (granite-gneiss-greenstone); the Metamorphic (slates, iron ore, quartz rock); and on the Keweenaw Peninsula, the Trap (with copper ore); the Trap Conglomerate; and the Red Sandrock. This Pioneer study demanded heroic effort and imagination because the swampy, forested terrain was barely penetrable, the outcrops are discontinuous, the rocks are often deformed, and the lithology changes locally within the formations. Houghton was aided in these accomplishments by William A. Burt, a US Linear Surveyor and the inventor of the solar compass, a sextant-like device used to supplement the surveyors compass. Together, Houghton and Burt formed the first combined geological-linear survey in the US. The combined survey was completed by the assistants Houghton had trained so well, William Burt and Bela Hubbard. Their reports (1846, 1847) supplemented Houghton's report of 1841 by showing the areal distribution of the exposed Precambrian rocks in the region thus facilitating future research, prospecting, and development.

  12. Nitrogen and carbon uptake dynamics in Lake Superior

    NASA Astrophysics Data System (ADS)

    Kumar, Sanjeev; Sterner, Robert W.; Finlay, Jacques C.

    2008-12-01

    Despite a fivefold rise in nitrate concentration over the last century, many fundamental aspects of Lake Superior's N and C cycles are still very poorly understood. We present here the first measurements of inorganic N uptake and in situ C uptake rates in Lake Superior, one of the largest lakes in the world. A profile of C uptake suggests that more than 95% of production occurs in the top 30 m with highest productivity to biomass ratio in the epilimnion. High C uptake:N uptake and particulate C: N ratio compared to the Redfield ratio (6.6) in the epilimnion suggests higher turnover rate of C compared to N in epilimnetic particles. Experiments performed over a range of typical environmental conditions suggest a strong temperature dependence of N uptake with maximum rates observed during the warmest stratified period. Lakewide N uptake estimates derived from a temperature-based model suggest that on an annual basis, uptake is considerably higher than total N inputs from outside the lake. This difference indicates that the lake is recycling N rapidly, leading to a shorter turnover time in the water column than previously assumed. The long-term buildup of nitrate in the lake has been hypothesized to arise from limited assimilation of nitrate entering the lake. In contrast, our results suggest that nitrate accumulating in the lake is a result of internal N cycling, a finding consistent with recent studies based on a nitrogen budget and NO3- stable isotope analyses.

  13. Designing functionally graded materials with superior load-bearing properties

    PubMed Central

    Zhang, Yu; Sun, Ming-jie; Zhang, Denzil

    2011-01-01

    Ceramic prostheses often fail from fracture and wear. We hypothesize that these failures may be substantially mitigated by an appropriate grading of elastic modulus at the ceramic surface. In this study, we elucidate the effect of elastic modulus profile on the flexural damage resistance of functionally graded materials (FGMs), providing theoretical guidlines for designing FGM with superior load-bearing property. The Young's modulus of the graded structure is assumed to vary in a power-law relation with a scaling exponent n; this is in accordance with experimental observations from our laboratory and elsewhere. Based on the theory for bending of graded beams, we examine the effect of n value and bulk-to-surface modulus ratio (Eb/Es) on stress distribution through the graded layer. Theory predicts that a low exponent (0.15 < n < 0.5), coupled with a relatively small modulus ratio (3 < Eb/Es < 6), is most desirable for reducing the maximum stress and transferring it into the interior, while keeping the surface stress low. Experimentally, we demonstrate that elastically graded materials with various n values and Eb/Es ratios can be fabricated by infiltrating alumina and zirconia with a low-modulus glass. Flexural tests show that graded alumina and zirconia with suitable values of these parameters exhibit superior load-bearing capacity, 20% to 50% higher than their homogeneous counterparts. Improving load-bearing capacity of ceramic materials could have broad impacts on biomedical, civil, structural, and an array of other engineering applications. PMID:22178651

  14. Malformation of the human superior olive in autistic spectrum disorders.

    PubMed

    Kulesza, Randy J; Lukose, Richard; Stevens, Lisa Veith

    2011-01-01

    Autistic spectrum disorders (ASD) comprise a continuum of psychosocial disorders clinically characterized by social difficulties, impaired communication skills and repetitive behavioral patterns. Despite the prevalence of ASD, the neurobiology of this disorder is poorly understood. However, abnormalities in neuronal morphology, cell number and connectivity have been described throughout the autistic brain. Further, there is ample evidence that auditory dysfunction is a common feature of autism. Our preliminary investigation of neuronal morphology in the auditory brainstem of individuals with ASD focused on the medial superior olive (MSO) and revealed that neurons in this region were significantly smaller and rounder than in controls. In this report, we expand our investigation to examine all nuclei within the human superior olivary complex (SOC), an important auditory brainstem center. We examine neuronal morphology and neuronal number in four control (average age=15 years) and 9 autistic brains (average age=15 years). This detailed investigation supports our previous descriptions of the MSO, and also reveals significant dysmorphology in five other SOC nuclei. Moreover, we provide evidence of a consistent and significant decrease in the number of SOC neurons in the autistic brain. Our studies implicate an extensive malformation of the auditory brainstem in the hearing and language difficulties in individuals with ASD. The results from this investigation suggest that neonatal testing of auditory function may aid in the identification of individuals with ASD earlier than presently possible. PMID:20946889

  15. El caso clínico de lo clásico a lo cierto

    Microsoft Academic Search

    Elena Serrano Ferrández

    2010-01-01

    La fuerza narrativa del “caso” de un paciente concreto supera en mucho el poder de cualquier tabla, número, comparación o porcentaje. Quizá la fuerza del caso clínico tenga que ver con nuestra ignorancia acerca de lo que los médicos saben y utilizan en sus decisiones. Por ello, los casos clínicos son esenciales en la enseñanza médica, tanto para estudiantes, como

  16. Superior Rectus Muscle Recession for Residual Head Tilt after Inferior Oblique Muscle Weakening in Superior Oblique Palsy

    PubMed Central

    Ahn, Seong Joon; Choi, Jin; Yu, Young Suk

    2012-01-01

    Purpose Residual head tilt has been reported in patients with superior oblique muscle palsy (SOP) after surgery to weaken the inferior oblique (IO) muscle. The treatments for these patients have not received appropriate attention. In this study, we evaluated the superior rectus (SR) muscle recession as a surgical treatment. Methods The medical records of 12 patients with SOP were retrospectively reviewed. Each of these patients had unilateral SR muscle recession for residual head tilt after IO muscle weakening due to SOP. The residual torticollis was classified into three groups on the basis of severity: mild, moderate, or severe. Both IO muscle overaction and vertical deviation, features of SOP, were evaluated in all patients. The severity of the preoperative and postoperative torticollis and vertical deviation were compared using a paired t-test and Fisher's exact test. Results The torticollis improved in nine of 12 (75%) patients after SR muscle recession. The difference between the preoperative and postoperative severity of torticollis was statistically significant (p = 0.0008). After surgery, the mean vertical deviation was significantly reduced from 12.4 prism diopters to 1.3 prism diopters (p = 0.0003). Conclusions Unilateral SR muscle recession is an effective method to correct residual head tilt after IO muscle weakening in patients with SOP. This surgical procedure is believed to decrease head tilt by reducing the vertical deviation and thereby the compensatory head tilt. PMID:22870028

  17. Agreement between Lake Superior State College and Lake Superior State College Faculty Association, MEA-NEA, September 1, 1986-September 1, 1988.

    ERIC Educational Resources Information Center

    Michigan Education Association, East Lansing.

    The collective bargaining agreement between Lake Superior State College (Michigan) and Lake Superior State College Faculty Association, an affiliate of the National Education Association, covering the period September 1, 1986-September 1, 1988, is presented. Items covered in the agreement include: unit recognition, association rights, grievances…

  18. Agreement between Lake Superior State University and Lake Superior State University Faculty Association MEA-NEA. Effective Sept. 1, 1988 to August 31, 1991.

    ERIC Educational Resources Information Center

    Lake Superior State Univ., Sault Sainte Marie, MI.

    The collective bargaining agreement between Lake Superior State University (Michigan) and the Lake Superior State University Faculty Association, an affiliate of the National Education Association, covering the period September 1, 1988 to August 31, 1991 is presented. The agreement covers the following items: definitions; recognition; association…

  19. Agreement between Lake Superior State College and Lake Superior State College Faculty Association (MEA/NEA), September 1, 1983-September 1, 1986.

    ERIC Educational Resources Information Center

    Michigan Education Association, East Lansing.

    The collective bargaining agreement between Lake Superior State College and the Lake Superior State College Faculty Association Chapter, an affiliate of the National Education Association and Michigan Education Association, covering the period September 1, 1983-September 1, 1986 is presented. The unit consists of 102 full-time and regular…

  20. Laparoscopic Ladd's procedure for superior mesenteric artery syndrome.

    PubMed

    Alsulaimy, Mohammad; Tashiro, Jun; Perez, Eduardo A; Sola, Juan E

    2014-10-01

    Superior mesenteric artery (SMA) syndrome is an uncommon condition where the third portion of the duodenum is compressed and obstructed between the SMA and the aorta. An otherwise healthy 17-year-old female presented with a 2-month history of postprandial abdominal pain and weight loss. Upper gastrointestinal (UGI) series demonstrated SMA obstruction of the third portion of the duodenum. Despite nasojejunal tube feedings over 4months with appropriate weight gain, symptoms continued and repeat UGI demonstrated persistent SMA syndrome. A laparoscopic Ladd's procedure served as definitive treatment. The steps of the procedure include mobilization of the Ligament of Treitz, mobilization of the right colon, complete derotation of the duodenum, delivery of the small bowel to the right upper quadrant, and appendectomy. Following the procedure, a postoperative UGI showed complete resolution of SMA compression of the duodenum. The patient had an uneventful postoperative course with immediate resolution of symptoms. She was discharged home tolerating a regular diet. PMID:25280662

  1. A superior edge preserving filter with a systematic analysis

    NASA Technical Reports Server (NTRS)

    Holladay, Kenneth W.; Rickman, Doug

    1991-01-01

    A new, adaptive, edge preserving filter for use in image processing is presented. It had superior performance when compared to other filters. Termed the contiguous K-average, it aggregates pixels by examining all pixels contiguous to an existing cluster and adding the pixel closest to the mean of the existing cluster. The process is iterated until K pixels were accumulated. Rather than simply compare the visual results of processing with this operator to other filters, some approaches were developed which allow quantitative evaluation of how well and filter performs. Particular attention is given to the standard deviation of noise within a feature and the stability of imagery under iterative processing. Demonstrations illustrate the performance of several filters to discriminate against noise and retain edges, the effect of filtering as a preprocessing step, and the utility of the contiguous K-average filter when used with remote sensing data.

  2. Coherent CO2 lidar: A superior system for observing clouds?

    NASA Technical Reports Server (NTRS)

    Eberhard, Wynn L.; Hardesty, R. Michael

    1992-01-01

    Lidars have long been used to study various parameters of clouds. NOAA's Wave Propagation Laboratory has operated a coherent CO2 lidar for over a decade, using Doppler to study wind fields and turbulence, atmospheric absorption for Differential Absorption Lidar (DIAL) applications, backscatter to investigate aerosol distributions, and backscatter and extinction measurements on clouds. A system under development for our laboratory promises to overcome the older system's problems of large size, frequency instability, and need for continual operator attention. We are also thoroughly evaluating the capabilities of CO2 lidar for observing clouds, including development of some new techniques. CO2 lidar provides a view of clouds different in many ways from that of lidars at other extinction measurements from clouds. This discussion argues in support of the proposition: coherent CO2 lidar can be a superior lidar system for measuring most cloud properties.

  3. A Astronomia no Ensino Superior Brasileiro entre 1808 e 1889

    NASA Astrophysics Data System (ADS)

    Bretones, Paulo S.; Videira, Antonio A. P.

    2003-05-01

    Este artigo apresenta os principais eventos ocorridos na história do ensino de astronomia nos cursos superiores que existiram no Brasil desde a chegada da Família Real portuguesa em 1808 até o final do período monárquico. Para compor esse esboço histórico, utilizamos, principalmente, livros didáticos, regulamentos, decretos e leis responsáveis pelas organizações dos conteúdos oferecidos e das carreiras dos responsáveis pela disciplina. Na análise do material empregado, investigamos a presença de concepções filosóficas e científicas, que podem ter norteado os conteúdos disciplinares. Não realizamos nenhuma comparação com o ensino de astronomia em outros países. Concluímos mostrando que o estudo de astronomia, durante o período monárquico, foi mais direcionado para a formação d engenheiros do que astrônomos. Gostaríamos de observar que o presente artigo não tem a pretensão de abordar o assunto de maneira completa e detalhada.

  4. Wilkie's Syndrome or Superior Mesenteric Artery Syndrome: Fact or Fantasy?

    PubMed Central

    Zaraket, Vera; Deeb, Liliane

    2015-01-01

    Superior mesenteric artery (SMA) syndrome (known as Wilkie's syndrome) is a rare cause of upper gastrointestinal obstruction. It is an acquired disorder in which acute angulation of the SMA causes compression of the third part of the duodenum between the SMA and the aorta. This is commonly due to loss of fatty tissue as a result of a variety of debilitating conditions. We report a 17-year-old female who presented with intermittent abdominal pain and intractable vomiting following significant weight loss after hospitalization for pneumonia. Symptoms persisted for 2 years and the patient underwent extensive invasive and non-invasive tests, but to no avail. Thereafter she developed acute high intestinal obstruction, which unraveled her diagnosis. This case emphasizes the challenges in the diagnosis of SMA syndrome and the need for increased awareness of this entity. This will improve early recognition in order to reduce irrelevant tests and unnecessary treatments. PMID:26120301

  5. Superior mesenteric vein thrombosis accompanied with severe appendicitis

    PubMed Central

    Lee, Kyo Won

    2014-01-01

    Superior mesenteric vein (SMV) thrombosis caused by acute appendicitis is a very rare entity nowadays. We report a successfully treated case of a 21-year-old man with SMV thrombosis associated with severe acute appendicitis. Intravenous heparin was administered, and it was later substituted with warfarin. Systemic antibiotic therapy was continued for 1 week, and it was substituted with oral antibiotics, which were administered for 3 weeks. On the 45th postoperative day, follow-up computed tomography scan demonstrated dissolution of SMV thrombosis. Anticoagulation therapy was maintained for 3 months. He was discharged without any complications. SMV thrombosis can be treated successfully with emergency appendectomy, broad-spectrum antibiotics, and anticoagulation therapy.

  6. Endovascular Management of Superior Mesenteric Artery Pseudoaneurysm and Fistula

    SciTech Connect

    Narayanan, Govindarajan, E-mail: gnarayanan@med.miami.ed [University of Miami/Jackson Memorial Hospital, Department of Radiology (United States); Mohin, Geetika, E-mail: geetika77@yahoo.co [Jackson Memorial Hospital, Department of Radiology (United States); Barbery, Katuska, E-mail: kbarbery@med.miami.ed [University of Miami, Department of Radiology (United States); Lamus, Daniel, E-mail: dlamus@med.miami.ed [Jackson Memorial Hospital, Resident of Department of Surgery (United States); Nanavati, Kunal, E-mail: knanavati@med.miami.ed [University of Miami/Jackson Memorial Hospital, Department of Radiology (United States); Yrizarry, Jose M., E-mail: jyrizarr@med.miami.ed [University of Miami/Jackson Memorial Hospital, Department of Vascular/Interventional Radiology (United States)

    2008-11-15

    The uncommon presentation of an arterioportal fistula (APF) involving the superior mesenteric artery (SMA) associated with a pseudoaneurysm represents a therapeutic challenge. We present the case of a 24-year-old female admitted to the hospital after multiple gunshot wounds to the abdomen; the patient underwent multiple surgeries and, in the process, developed a SMA pseudoaneurysm and fistula. The vascular interventional radiology team was consulted for treatment of the pseudoaneurysm and fistula. A covered stent was inserted percutaneously to exclude the APF and the pseudoaneurysm in a single procedure. The patient returned to our service after 21 months for a follow-up CT scan, which demonstrated the stent and the distal vasculature to be patent.

  7. The contamination of Lake Superior with amphibole gangue minerals.

    PubMed

    Langer, A M; Maggiore, C M; Nicholson, W J; Rohl, A N; Rubin, I B; Selikoff, I J

    1979-01-01

    Iron ore called taconite is mined in the Biwabik Iron Formation in the Eastern Mesabi region of the Mesabi Range, in eastern Minnesota. After mining, ore is shipped to Silver Bay, Minnnesota for processing and wet magnetic extraction. Tailings from the process are dumped, as a slurry, into a man-made containment delta constructed in Lake Superior. Submicroscopic amphibole fibers and/or cleavage fragments, a component of the gangue, apparently escape from the delta at Silver Bay, and enter Lake Superior. These particles contaiminate the potable water supplies of municipalities drawing directly from the lake. One of the gangue minerals is the amphibole grunerite, whose asbestiform variety is called amosite. Major emphasis of this study was directed at identification of submicroscopic particle pollutants, based on morphology, structure and chemical composition. Quantitative determination of fibrous amphibole phases, present in a range of water samples, was undertaken. Transmission electron microscopy, selected area electron diffraction, and an electron microprobe technique was used for identification and enumeration and this information was compared with data sets determined from standards. Grunerite fiber and/or acicular cleavage fragments, in some instances indistinguishable from asbestiform grunerite, are present in the tailings, lake water and drinking water of a number of municipalities, a result of contamination of the lake at the Silver Bay milling operation. This amphibole is found in drinking water in concentrations which range from 0.6 to 2.8 X 10(6) fiber/liter. The risk to health, associated with direct ingestion of grunerite fiber is unknown and is extrapolated from the asbestiform grunerite (amosite) data base. The biological activity of other fibrous amphiboles observed, unrelated to any asbestiform silicate variety, is presently unknown and warrants investigation. PMID:294208

  8. Metabolic Maturation of Auditory Neurones in the Superior Olivary Complex.

    PubMed

    Trattner, Barbara; Gravot, Céline Marie; Grothe, Benedikt; Kunz, Lars

    2013-01-01

    Neuronal activity is energetically costly, but despite its importance, energy production and consumption have been studied in only a few neurone types. Neuroenergetics is of special importance in auditory brainstem nuclei, where neurones exhibit various biophysical adaptations for extraordinary temporal precision and show particularly high firing rates. We have studied the development of energy metabolism in three principal nuclei of the superior olivary complex (SOC) involved in precise binaural processing in the Mongolian gerbil (Meriones unguiculatus). We used immunohistochemistry to quantify metabolic markers for energy consumption (Na(+)/K(+)-ATPase) and production (mitochondria, cytochrome c oxidase activity and glucose transporter 3 (GLUT3)). In addition, we calculated neuronal ATP consumption for different postnatal ages (P0-90) based upon published electrophysiological and morphological data. Our calculations relate neuronal processes to the regeneration of Na(+) gradients perturbed by neuronal firing, and thus to ATP consumption by Na(+)/K(+)-ATPase. The developmental changes of calculated energy consumption closely resemble those of metabolic markers. Both increase before and after hearing onset occurring at P12-13 and reach a plateau thereafter. The increase in Na(+)/K(+)-ATPase and mitochondria precedes the rise in GLUT3 levels and is already substantial before hearing onset, whilst GLUT3 levels are scarcely detectable at this age. Based on these findings we assume that auditory inputs crucially contribute to metabolic maturation. In one nucleus, the medial nucleus of the trapezoid body (MNTB), the initial rise in marker levels and calculated ATP consumption occurs distinctly earlier than in the other nuclei investigated, and is almost completed by hearing onset. Our study shows that the mathematical model used is applicable to brainstem neurones. Energy consumption varies markedly between SOC nuclei with their different neuronal properties. Especially for the medial superior olive (MSO), we propose that temporally precise input integration is energetically more costly than the high firing frequencies typical for all SOC nuclei. PMID:23826275

  9. Results from a geophysical investigation of Lake Superior's ring structures

    NASA Astrophysics Data System (ADS)

    Wattrus, N. J.; Gustafson, D.

    2010-12-01

    Ring shaped depressions are widely developed on the lake floor of Lake Superior. They have not been widely reported elsewhere. The rings are typically between 200 and 300 m across and up to 5 m deep. The width of the depression ranges between 10 to 30 m. They often occur in closely spaced groups or networks but can also occur as isolated features. Several mechanisms have been proposed to explain the formation of these features; they include syneresis of the fine-grained lake floor sediments, polygonal faulting and dewatering of the lake floor sediments. High resolution bathymetric surveying with a multibeam sonar has revealed that they are comprised of pockmarks arranged in irregular polygonal patterns. Sidescan sonar images of the pockmarks often exhibit increased backscatter about the pock which could be interpreted as evidence of a lag-surface. High-resolution CHIRP sub-bottom profiling across the pocks occasionally reveal chimney-like structures below the lake floor pock. This evidence suggests that the rings were produced by the expulsion of fluid from the lake floor. This appears to have been a basin-wide event. The timing, duration and origin of this are not well known. Neither is the structure of the subsurface plumbing below these features. Here we present results from a geophysical survey conducted in northwestern Lake Superior off the western coast of Isle Royale where both isolated and grouped lake floor rings are well developed. The objectives of the survey were to define the geometry of the sub-surface plumbing below the rings and to possibly gain some insight into how these systems develop. The data collected included two high-resolution pseudo-3D single-channel seismic reflection datasets, one acquired with a small airgun and a second acquired with a CHIRP profiler. Multibeam and sidescan sonar data were also acquired as part of the survey. A 9 m piston core was collected in close proximity to a ring feature. This is used to determine the physical characteristics of the near-surface sediments and to calibrate the seismic data.

  10. MTU-Kestrel airborne hyperspectral imaging campaigns of the Lake Superior ecosystem

    Microsoft Academic Search

    J. Bruce Rafert; William J. Slough; Charles A. Rohde; Andrew Pilant; Leonard J. Otten; Andrew D. Meigs; Al Jones; Eugene W. Butler

    1999-01-01

    The clear waters of Lake Superior constitute the heart of one of the most significant fresh water ecosystems in the world. Lake Superior is the world's largest lake by surface area (82,100 km2) holding approximately 10% of the earth's freshwater (12,230 km3) that is not locked into glaciers or ice caps. Although Superior is arguably the most significant fresh water

  11. Successful Treatment of Isolated Spontaneous Superior Mesenteric Artery Dissection with Stent Placement

    SciTech Connect

    Yoon, Young-Won; Choi, Donghoon; Cho, Seung-Yun [Yonsei Cardiovascular Hospital, Yonsei Cardiovascular Research Institute, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-Ku, 120-752 Seoul, Cardiology Division (Korea, Republic of); Lee, Do Yun [Yonsei Cardiovascular Hospital, Yonsei Cardiovascular Research Institute, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-Ku, 120-752 Seoul, Division of Diagnostic Radiology (Korea, Republic of)

    2003-09-15

    Isolated dissection of superior mesenteric artery is a rare condition and is usually treated surgically. We treated a patient with severe abdominal pain who was angiographically confirmed to have superior mesenteric artery thrombosis associated with isolated spontaneous dissection. He was treated initially by thrombolysis and oral anticoagulation, but recurrent symptoms developed with radiologic evidence of disease progression. We performed superior mesenteric artery stenting and recovery was uneventful.

  12. Behavioral and neuroanatomical investigation of Highly Superior Autobiographical Memory (HSAM)

    PubMed Central

    LePort, Aurora K.R.; Mattfeld, Aaron T.; Dickinson-Anson, Heather; Fallon, James H.; Stark, Craig E.L.; Kruggel, Frithjof; Cahill, Larry; McGaugh, James L.

    2013-01-01

    A single case study recently documented one woman’s ability to recall accurately vast amounts of autobiographical information, spanning most of her lifetime, without the use of practiced mnemonics (Parker, Cahill, & McGaugh, 2006). The current study reports findings based on eleven participants expressing this same memory ability, now referred to as Highly Superior Autobiographical Memory (HSAM). Participants were identified and subsequently characterized based on screening for memory of public events. They were then tested for personal autobiographical memories as well as for memory assessed by laboratory memory tests. Additionally, whole-brain structural MRI scans were obtained. Results indicated that HSAM participants performed significantly better at recalling public as well as personal autobiographical events as well as the days and dates on which these events occurred. However, their performance was comparable to age- and sex-matched controls on most standard laboratory memory tests. Neuroanatomical results identified nine structures as being morphologically different from those of control participants. The study of HSAM may provide new insights into the neurobiology of autobiographical memory. PMID:22652113

  13. Anesthetic efficacy of the anterior middle superior alveolar (AMSA) injection.

    PubMed Central

    Lee, Shelly; Reader, Al; Nusstein, John; Beck, Mike; Weaver, Joel

    2004-01-01

    The purpose of this prospective, randomized, blinded study was to determine the anesthetic efficacy of the anterior middle superior alveolar (AMSA) injection using the computer-assisted Wand Plus injection system versus a conventional syringe. The authors, using a crossover design, randomly administered in a blind manner 2 AMSA injections utilizing the computer-assisted injection system and a conventional syringe to 40 subjects during 2 separate appointments. A pulp tester was used to test for anesthesia, in 4-minute cycles for 60 minutes, of the central and lateral incisors, canine, and first and second premolars. Anesthesia was considered successful when 2 consecutive no responses (80 readings) with the pulp tester were obtained. For all teeth, except the central incisor, the use of the computer-assisted injection system was significantly (P < .05) more likely to result in pulpal anesthesia than the use of the conventional syringe technique. For the computer-assisted injection system, successful pulpal anesthesia ranged from 35 to 58%, and for the conventional syringe, successful pulpal anesthesia ranged from 20 to 42%. For both techniques, the onset of pulpal anesthesia was slow, and duration of pulpal anesthesia declined steadily over 60 minutes. We conclude that although the AMSA injection using the computer-assisted injection system was more successful than the conventional syringe technique, the rather modest to low success rates, slow onset, and declining duration of pulpal anesthesia over 60 minutes would not ensure predictable pulpal anesthesia from the second premolar to the central incisor. PMID:15497297

  14. MRI Assessment of Superior Temporal Gyrus in Williams Syndrome

    PubMed Central

    Sampaio, Adriana; Sousa, Nuno; Férnandez, Montse; Vasconcelos, Cristiana; Shenton, Martha E.; Gonçalves, Óscar F.

    2009-01-01

    Objective To evaluate volumes and asymmetry of superior temporal gyrus (STG) and correlate these measures with a neurocognitive evaluation of verbal performance in Williams syndrome (WS) and in a typically developing age-matched and sex-matched group. Background Despite initial claims of language strength in WS, recent studies suggest delayed language milestones. The STG is implicated in linguistic processing and is a highly lateralized brain region. Method Here, we examined STG volumes and asymmetry of STG in WS patients and in age-matched controls. We also correlated volume of STG with a subset of verbal measures. Magnetic resonance imaging scans were obtained on a GE 1.5-T magnet with 1.5-mm contiguous slices, and were used to measure whole gray matter, white matter, and cerebrospinal fluid volumes, and also STG volume. Results Results revealed significantly reduced intracranial volume in WS patients, compared with controls. Right and left STG were also significantly smaller in WS patients. In addition, compared with normal controls, a lack of normal left >right STG asymmetry was evident in WS. Also of note was the finding that, in contrast to controls, WS patients did not reveal a positive correlation between verbal intelligence quotient and left STG volume, which further suggests a disruption in this region of the brain. Conclusions In conclusion, atypical patterns of asymmetry and reduced STG volume in WS were observed, which may, in part, contribute to some of the linguistic impairments found in this cohort of WS patients. PMID:18797257

  15. Teaching Condom Use Skills: Practice is Superior to Observation

    PubMed Central

    Calsyn, Donald A.; Hatch-Maillette, Mary A.; Doyle, Suzanne R.; Cousins, Sarah; Chen, TeChieh; Godinez, Melinda

    2010-01-01

    Men exposed to a condom skills practice exercise were hypothesized to perform better on condom skills measures than those exposed only to a demonstration or to no intervention. As part of a larger NIDA Clinical Trials Network HIV Prevention protocol men in substance abuse treatment were administered male and female condom use skills measures (MCUS, FCUS) at pre-intervention, two weeks, 3 months and 6 months post-intervention. The MCUS and FCUS scores were compared for three intervention exposure groups (demonstration only [DO, n=149], demonstration plus practice [D+P; n=112], attended no sessions [NS, n=139]) across the 4 assessment time points using a mixed effects linear regression model. There is a statistically significant intervention group-by-time effect (p<.0001) for both the MCUS and FCUS. Post hoc, pairwise linear trends across time indicated that for both the MCUS and the FCUS the D+P group is significantly superior to the DO group and the NS group. PMID:21038177

  16. Gillnet selectivity for lake trout (Salvelinus namaycush) in Lake Superior

    USGS Publications Warehouse

    Hansen, Michael J.; Madenjian, Charles P.; Selgeby, James H.; Helser, Thomas E.

    1997-01-01

    Gillnet selectivity for lake trout (Salvelinus namaycush) was estimated indirectly from catches in nets of 102-, 114-, 127-, 140-, and 152-mm stretch measure. Mesh selectivity was modeled as a nonlinear response surface that describes changes in the mean, standard deviation, and skewness of fish lengths across mesh sizes. Gillnet selectivity for lake trout was described by five parameters that explained 88% of the variation in wedged and entangled catches, 81% of the variation in wedged catches, and 82% of the variation in entangled catches. Combined catches of wedged and entangled lake trout were therefore described more parsimoniously than separate catches of wedged and entangled lake trout. Peak selectivity of wedged and entangled fish increased from 588 to 663 mm total length as mesh size increased from 102 to 152 mm, and relative selectivity peaked at a total length of 638 mm. The estimated lake trout population size-frequency indicated that gillnet catches were negatively biased toward both small and large lake trout. As a consequence of this bias, survival of Lake Superior lake trout across ages 9-11 was underestimated by about 20% when the catch curve was not adjusted for gillnet selectivity.

  17. Energetic Particle Synthesis of Metastable Layers for Superior Mechanical Properties

    SciTech Connect

    Follstaedt, D.M.; Knapp, J.A.; Myers, S.M.; Dugger, M.T.; Friedmann, T.A.; Sullivan, J.P. [Sandia National Labs., Albuquerque, NM (United States); Monteiro, O.R.; Ager, J.W. III; Brown, I.G.; Christenson, T. [Lawrence Berkeley National Lab., CA (United States)

    1998-01-01

    Energetic particle methods have been used to synthesize two metastable layers with superior mechanical properties: amorphous Ni implanted with overlapping Ti and C, and amorphous diamond-like carbon (DLC) formed by vacuum-arc deposition or pulsed laser deposition. Elastic modulus, yield stress and hardness were reliably determined for both materials by fitting finite-element simulations to the observed layer/substrate responses during nanoindentation. Both materials show exceptional properties, i.e., the yield stress of amorphous Ni(Ti,C) exceeds that of hardened steels and other metallic glasses, and the hardness of DLC (up to 88 GPa) approaches that of crystalline diamond (approx. 100 GPa). Tribological performance of the layers during unlubricated sliding contact appears favorable for treating Ni-based micro-electromechanical systems: stick-slip adhesion to Ni is eliminated, giving a low coefficient of friction (approx. 0.3-0.2) and greatly reduced wear. We discuss how energetic particle synthesis is critical to forming these phases and manipulating their properties for optimum performance.

  18. Superior piezoelectric composite films: taking advantage of carbon nanomaterials.

    PubMed

    Saber, Nasser; Araby, Sherif; Meng, Qingshi; Hsu, Hung-Yao; Yan, Cheng; Azari, Sara; Lee, Sang-Heon; Xu, Yanan; Ma, Jun; Yu, Sirong

    2014-01-31

    Piezoelectric composites comprising an active phase of ferroelectric ceramic and a polymer matrix have recently found numerous sensory applications. However, it remains a major challenge to further improve their electromechanical response for advanced applications such as precision control and monitoring systems. We here investigated the incorporation of graphene platelets (GnPs) and multi-walled carbon nanotubes (MWNTs), each with various weight fractions, into PZT (lead zirconate titanate)/epoxy composites to produce three-phase nanocomposites. The nanocomposite films show markedly improved piezoelectric coefficients and electromechanical responses (50%) besides an enhancement of ~200% in stiffness. The carbon nanomaterials strengthened the impact of electric field on the PZT particles by appropriately raising the electrical conductivity of the epoxy. GnPs have been proved to be far more promising in improving the poling behavior and dynamic response than MWNTs. The superior dynamic sensitivity of GnP-reinforced composite may be caused by the GnPs' high load transfer efficiency arising from their two-dimensional geometry and good compatibility with the matrix. The reduced acoustic impedance mismatch resulting from the improved thermal conductance may also contribute to the higher sensitivity of GnP-reinforced composite. This research pointed out the potential of employing GnPs to develop highly sensitive piezoelectric composites for sensing applications. PMID:24398819

  19. Vowel sound extraction in anterior superior temporal cortex.

    PubMed

    Obleser, Jonas; Boecker, Henning; Drzezga, Alexander; Haslinger, Bernhard; Hennenlotter, Andreas; Roettinger, Michael; Eulitz, Carsten; Rauschecker, Josef P

    2006-07-01

    We investigated the functional neuroanatomy of vowel processing. We compared attentive auditory perception of natural German vowels to perception of nonspeech band-passed noise stimuli using functional magnetic resonance imaging (fMRI). More specifically, the mapping in auditory cortex of first and second formants was considered, which spectrally characterize vowels and are linked closely to phonological features. Multiple exemplars of natural German vowels were presented in sequences alternating either mainly along the first formant (e.g., [u]-[o], [i]-[e]) or along the second formant (e.g., [u]-[i], [o]-[e]). In fixed-effects and random-effects analyses, vowel sequences elicited more activation than did nonspeech noise in the anterior superior temporal cortex (aST) bilaterally. Partial segregation of different vowel categories was observed within the activated regions, suggestive of a speech sound mapping across the cortical surface. Our results add to the growing evidence that speech sounds, as one of the behaviorally most relevant classes of auditory objects, are analyzed and categorized in aST. These findings also support the notion of an auditory "what" stream, with highly object-specialized areas anterior to primary auditory cortex. PMID:16281283

  20. Neural Mechanisms of Stimulus Velocity Tuning in the Superior Colliculus

    PubMed Central

    Razak, Khaleel A.; Pallas, Sarah L.

    2006-01-01

    Superior colliculus (SC)–mediated control of visuomotor behavior depends on neuronal selectivity for stimulus velocity. However, the mechanism responsible for velocity tuning in SC neurons is unclear. It was shown in a previous study of anesthetized, decorticate hamsters that the number and distribution of feed-forward retinal inputs are not critical for velocity tuning. Here the alternate hypothesis that inhibition from the surround determines velocity tuning of SC neurons was tested. Surround inhibition was present in 65% (43/66) of SC neurons recorded in the superficial gray layer. Neurons within this group that were selective for slowly moving stimuli exhibited spatially asymmetric surround inhibition, and their velocity tuning arose by preferential suppression of responses to rapidly moving stimuli. In the other 35% (23/66) of SC neurons recorded, surround inhibition was weak or absent and did not play a role in velocity tuning. Most neurons with surround inhibition were nonselective for the duration of stationary flashed stimuli, whereas neurons without surround inhibition were selective for stimulus duration. The majority of neurons that preferred intermediate or rapidly moving stimuli exhibited spatially symmetric surround inhibition. In these neurons, occluding the surround reduced velocity selectivity by enhancing responses to slowly moving stimuli. Based on these data, a model is proposed suggesting spatiotemporal interactions between inhibition and excitation that could underlie velocity tuning. PMID:16079191

  1. Anisotropic vanadium dioxide sculptured thin films with superior thermochromic properties.

    PubMed

    Sun, Yaoming; Xiao, Xiudi; Xu, Gang; Dong, Guoping; Chai, Guanqi; Zhang, Hua; Liu, Pengyi; Zhu, Hanmin; Zhan, Yongjun

    2013-01-01

    VO2 (M) STF through reduction of V2O5 STF was prepared. The results illustrate that V2O5 STF can be successfully obtained by oblique angle thermal evaporation technique. After annealing at 550 °C/3 min, the V2O5 STF deposited at 85° can be easily transformed into VO2 STF with slanted columnar structure and superior thermochromic properties. After deposition SiO2 antireflective layer, Tlum of VO2 STF is enhanced 26% and ?Tsol increases 60% compared with that of normal VO2 thin films. Due to the anisotropic microstructure of VO2 STF, angular selectivity transmission of VO2 STF is observed and the solar modulation ability is further improved from 7.2% to 8.7% when light is along columnar direction. Moreover, the phase transition temperature of VO2 STF can be depressed into 54.5 °C without doping. Considering the oblique incidence of sunlight on windows, VO2 STF is more beneficial for practical application as smart windows compared with normal homogenous VO2 thin films. PMID:24067743

  2. Superior piezoelectric composite films: taking advantage of carbon nanomaterials

    NASA Astrophysics Data System (ADS)

    Saber, Nasser; Araby, Sherif; Meng, Qingshi; Hsu, Hung-Yao; Yan, Cheng; Azari, Sara; Lee, Sang-Heon; Xu, Yanan; Ma, Jun; Yu, Sirong

    2014-01-01

    Piezoelectric composites comprising an active phase of ferroelectric ceramic and a polymer matrix have recently found numerous sensory applications. However, it remains a major challenge to further improve their electromechanical response for advanced applications such as precision control and monitoring systems. We here investigated the incorporation of graphene platelets (GnPs) and multi-walled carbon nanotubes (MWNTs), each with various weight fractions, into PZT (lead zirconate titanate)/epoxy composites to produce three-phase nanocomposites. The nanocomposite films show markedly improved piezoelectric coefficients and electromechanical responses (50%) besides an enhancement of ˜200% in stiffness. The carbon nanomaterials strengthened the impact of electric field on the PZT particles by appropriately raising the electrical conductivity of the epoxy. GnPs have been proved to be far more promising in improving the poling behavior and dynamic response than MWNTs. The superior dynamic sensitivity of GnP-reinforced composite may be caused by the GnPs’ high load transfer efficiency arising from their two-dimensional geometry and good compatibility with the matrix. The reduced acoustic impedance mismatch resulting from the improved thermal conductance may also contribute to the higher sensitivity of GnP-reinforced composite. This research pointed out the potential of employing GnPs to develop highly sensitive piezoelectric composites for sensing applications.

  3. Food of salmonine predators in Lake Superior, 1981-87

    USGS Publications Warehouse

    Conner, David J.; Bronte, Charles R.; Selgeby, James H.; Collins, Hollie L.

    1993-01-01

    Diets of ten species of Lake Superior salmonines are described. Rainbow smelt (Osmerus mordax) were the primary prey during all seasons and years for inshore lake trout (Salvelinus namaycush), Pacific salmon (Oncorhynchus spp.), Atlantic salmon (Salmo salar), brown trout (S. trutta), brook trout (Salvelinus fontinalis), and splake (lake trout x brook trout hybrid). Coregonines were the second most-important prey for chinook salmon (O. tshawytscha), siscowet trout (S. namaycush siscowet), and splake. Invertebrates were important to rainbow trout (O. mykiss), coho salmon (O. kisutch), and pink salmon (O. gorbuscha), especially during the summer. Diets of lake trout from inshore and offshore locations differed markedly. Rainbow smelt were the primary food of inshore lake trout, and coregonines were the main food of offshore lake trout. Chinook salmon and inshore lake trout had the most similar diets because they ate similar proportions of rainbow smelt and coregonines. Salmonines generally ate more rainbow smelt and less coregonines in proportion to the abundance of these prey in the lake. If rainbow smelt populations collapse, the ability of salmonines to convert to a diet based on lake herring (Coregonus artedi) could be important to the stability of predator populations.

  4. Relationship of Hypertropia and Excyclotorsion in Superior Oblique Palsy

    PubMed Central

    Lee, Jung Jin; Chun, Ko I; Baek, Seung-Hee

    2013-01-01

    Purpose To evaluate the correlation between hypertropia and excyclotorsion in acquired superior oblique palsy (SOP). Methods Thirty-one patients with acquired unilateral SOP were recruited for this study. The torsional angle of each patient was assessed via one objective method (fundus photography) and two subjective methods (double Maddox rod test and major amblyoscope). The patient population was divided into two groups (concordance group, n = 19 and discordance group, n = 12) according to the correspondence between the hypertropic eye (paralytic eye) and the more extorted eye (non-fixating eye), which was evaluated by fundus photography. Results The mean value of objective torsion was 5.09° ± 3.84°. The subjective excyclotorsion degrees were 5.18° ± 4.11° and 3.65° ± 1.93° as measured by double Maddox rod test and major amblyoscope, respectively. Hypertropia and the excyclotorsional angle did not differ significantly between the groups (p = 0.257). Although no correlation was found in the discordance group, the concordance group showed a significant and positive correlation between hypertropia and excyclotorsion (p = 0.011). Conclusions Torsional deviation was not related to hypertropia. However, in the concordance patients in whom the hypertropic eye showed excyclotorsion, a significant positive correlation was found between hypertropia and excyclotorsion. PMID:23372378

  5. Escuela Tecnica Superior de Ingenieros de Caminos, Canales y Puertos (Madrid) Mecanica de Medios Continuos

    E-print Network

    Romero, Ignacio

    ) p 0. Dibujar en cada caso el c´irculo de Mohr correspondiente al estado de tensiones y la l´inea de = 200 3 y p = 0. Dibujar en cada caso el c´irculo de Mohr correspondiente al estado de tensiones y la l

  6. Cortical projections to the superior colliculus in tree shrews (Tupaia belangeri)

    PubMed Central

    Baldwin, Mary K L; Wei, Haiyang; Reed, Jamie L; Bickford, Martha E; Petry, Heywood M; Kaas, Jon H

    2012-01-01

    The visuomotor functions of the superior colliculus depend not only on direct inputs from the retina, but also on inputs from neocortex. As mammals vary in the areal organization of neocortex, and in the organization of the number of visual and visuomotor areas, patterns of corticotectal projections vary. Primates in particular have a large number of visual areas projecting to the superior colliculus. As tree shrews are close relatives of primates, and they are also highly visual, we studied the distribution of cortical neurons projecting to the superior colliculus by injecting anatomical tracers into the colliculus. Since projections from visuotopically organized visual areas are expected to match the visuotopy of the superior colliculus, injections at different retinotopic locations in the superior colliculus provide information about the locations and organization of topographic areas in extrastriate cortex. Small injections in the superior colliculus labeled neurons in locations within areas 17 (V1) and 18 (V2) that are consistent with the known topography of these areas and the superior colliculus. In addition, the separate locations of clusters of labeled cells in temporal visual cortex provide evidence for five or more topographically organized areas. Injections that included deeper layers of the superior colliculus also labeled neurons in medial frontal cortex, likely in premotor cortex. Only occasional labeled neurons were observed in somatosensory or auditory cortex. Regardless of tracer injection location, we found that unlike primates, a substantial projection to the superior colliculus from posterior parietal cortex is not a characteristic of tree shrews. PMID:23124770

  7. Scuola Internazionale Superiore di Studi Avanzati, Trieste, Italy Theoretical Studies on the KcsA

    E-print Network

    Guidoni, Leonardo

    ..................................................................................................................................... 27 2.1 CLASSICAL MOLECULAR DYNAMICS SIMULATIONSScuola Internazionale Superiore di Studi Avanzati, Trieste, Italy Theoretical Studies on the Kcs...................................................................................................................... 12 1.4.3 EPR Spectroscopy data

  8. Electrophysiologic Responses in Hamster Superior Colliculus Evoked by Regenerating Retinal Axons

    NASA Astrophysics Data System (ADS)

    Keirstead, S. A.; Rasminsky, M.; Fukuda, Y.; Carter, D. A.; Aguayo, A. J.; Vidal-Sanz, M.

    1989-10-01

    Autologous peripheral nerve grafts were used to permit and direct the regrowth of retinal ganglion cell axons from the eye to the ipsilateral superior colliculus of adult hamsters in which the optic nerves had been transected within the orbit. Extracellular recordings in the superior colliculus 15 to 18 weeks after graft insertion revealed excitatory and inhibitory postsynaptic responses to visual stimulation. The finding of light-induced responses in neurons in the superficial layers of the superior colliculus close to the graft indicates that axons regenerating from axotomized retinal ganglion cells can establish electrophysiologically functional synapses with neurons in the superior colliculus of these adult mammals.

  9. Visual adaptation and novelty responses in the superior colliculus

    PubMed Central

    Boehnke, Susan E.; Berg, David J.; Marino, Robert M.; Baldi, Pierre F.; Itti, Laurent; Munoz, Douglas P.

    2011-01-01

    The brain's ability to ignore repeating, often redundant, information while enhancing novel information processing is paramount to survival. When stimuli are repeatedly presented, the response of visually-sensitive neurons decreases in magnitude, i.e. neurons adapt or habituate, although the mechanism is not yet known. We monitored activity of visual neurons in the superior colliculus (SC) of rhesus monkeys who actively fixated while repeated visual events were presented. We dissociated adaptation from habituation as mechanisms of the response decrement by using a Bayesian model of adaptation, and by employing a paradigm including rare trials that included an oddball stimulus that was either brighter or dimmer. If the mechanism is adaptation, response recovery should be seen only for the brighter stimulus; if habituation, response recovery (‘dishabituation’) should be seen for both the brighter and dimmer stimulus. We observed a reduction in the magnitude of the initial transient response and an increase in response onset latency with stimulus repetition for all visually responsive neurons in the SC. Response decrement was successfully captured by the adaptation model which also predicted the effects of presentation rate and rare luminance changes. However, in a subset of neurons with sustained activity to visual stimuli, a novelty signal akin to dishabituation was observed late in the visual response profile to both brighter and dimmer stimuli and was not captured by the model. This suggests that SC neurons integrate both rapidly discounted information about repeating stimuli and novelty information about oddball events, to support efficient selection in a cluttered dynamic world. PMID:21864319

  10. Discharge patterns in the lateral superior olive of decerebrate cats.

    PubMed

    Greene, Nathaniel T; Davis, Kevin A

    2012-10-01

    Anatomical and pharmacological studies have shown that the lateral superior olive (LSO) receives inputs from a number of sources and that LSO cells can alter the balance of their own excitatory and inhibitory drive. It is thus likely that the ongoing sound-evoked responses of LSO cells reflect a complex interplay of excitatory and inhibitory events, which may be affected by anesthesia. The goal of this study was to characterize the temporal discharge patterns of single units in the LSO of unanesthetized, decerebrate cats in response to long-duration ipsilateral best-frequency tone bursts. A decision tree is presented to partition LSO units on the basis of poststimulus time histogram shape, adaptation of instantaneous firing rate as a function of time, and sustained discharge rate. The results suggest that LSO discharge patterns form a continuum with four archetypes: sustained choppers that show two or more peaks of activity at stimulus onset and little adaptation of rate throughout the response, transient choppers that undergo a decrease in rate that eventually stabilizes with time, primary-like units that display an initial peak of activity followed by a monotonic decline in rate to a steady-state value, and onset-sustained units that exhibit an initial peak of activity at stimulus onset followed by a low sustained activity. Compared with the chopper units, the nonchopper units tend to show longer first-spike latencies, lower peak firing rates, and more irregular sustained discharge patterns. Modeling studies show that the full range of LSO response types can be obtained from an underlying sustained chopper by varying the strength and latency of a sound-driven ipsilateral inhibition relative to that of excitation. Together, these results suggest that inhibition plays a major role in shaping the temporal discharge patterns of units in unanesthetized preparations. PMID:22745462

  11. Brain Organization Underlying Superior Mathematical Abilities in Children with Autism

    PubMed Central

    Iuculano, Teresa; Rosenberg-Lee, Miriam; Supekar, Kaustubh; Lynch, Charles J.; Khouzam, Amirah; Phillips, Jennifer; Uddin, Lucina Q.; Menon, Vinod

    2013-01-01

    Background Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by social and communication deficits. While such deficits have been the focus of most research, recent evidence suggests that individuals with ASD may exhibit cognitive strengths in domains such as mathematics. Methods Cognitive assessments and functional brain imaging were used to investigate mathematical abilities in 18 children with ASD and 18 age-, gender-, and IQ-matched typically developing (TD) children. Multivariate classification and regression analyses were used to investigate whether brain activity patterns during numerical problem solving were significantly different between the groups and predictive of individual mathematical abilities. Results Children with ASD showed better numerical problem solving abilities and relied on sophisticated decomposition strategies for single-digit addition problems more frequently than TD peers. Although children with ASD engaged similar brain areas as TD children, they showed different multivariate activation patterns related to arithmetic problem complexity in ventral temporal-occipital cortex, posterior parietal cortex, and medial temporal lobe. Furthermore, multivariate activation patterns in ventral temporal-occipital cortical areas typically associated with face processing predicted individual numerical problem solving abilities in children with ASD but not in TD children. Conclusions Our study suggests that superior mathematical information processing in children with ASD is characterized by a unique pattern of brain organization and that cortical regions typically involved in perceptual expertise may be utilized in novel ways in ASD. Our findings of enhanced cognitive and neural resources for mathematics have critical implications for educational, professional, and social outcomes for individuals with this lifelong disorder. PMID:23954299

  12. Second-Side Surgery in Superior Canal Dehiscence Syndrome

    PubMed Central

    Agrawal, Yuri; Minor, Lloyd B.; Schubert, Michael C.; Janky, Kristen L.; Davalos-Bichara, Marcela; Carey, John P.

    2014-01-01

    Objective Bilateral superior canal (SC) dehiscence syndrome poses a challenge because bilateral SC dehiscence (SCD) plugging might be expected to result in oscillopsia and disability. Our aims were as follows: 1) to evaluate which symptoms prompted patients with bilateral SCD syndrome (SCDS) to seek second-side surgery, and 2) to determine the prevalence of disabling imbalance and oscillopsia after bilateral SC plugging. Study Design Prospective observational study. Setting Tertiary referral center. Patients Five patients with bilateral SCDS based on history, audiometric and physiologic testing, and computed tomographic findings. This includes all of our patients who have had second-side plugging surgery to date. Intervention(s) Bilateral sequential middle fossa craniotomy and plugging of SCs. Main Outcome Measure(s) Cochleovestibular symptoms, cervical and ocular vestibular-evoked myogenic potential testing, dizziness handicap inventory, short-form 36 Health Survey, dynamic visual acuity testing. Results The most common symptoms prompting second-side surgery were sound- and pressure-induced vertigo and autophony. Three of the 5 patients reported that symptoms shifted to the contralateral ear immediately after plugging the first side, whereas in 2 patients, contralateral symptoms developed several years after the first SC plugging. Two of 4 patients experienced ongoing oscillopsia after bilateral SCDS surgery; however, all patients reported relief from their SCD symptoms and were glad that they had pursued bilateral surgery. Conclusion In patients with bilateral SCDS, sound- and pressure-induced vertigo most commonly prompted second-side surgery. Despite some degree of oscillopsia after bilateral SCDS surgery, patients were very satisfied with second-side surgery, given their relief from other SCDS symptoms. PMID:22158019

  13. The role of the superior colliculus in predatory hunting.

    PubMed

    Furigo, I C; de Oliveira, W F; de Oliveira, A R; Comoli, E; Baldo, M V C; Mota-Ortiz, S R; Canteras, N S

    2010-01-13

    Combining the results of behavioral, neuronal immediate early gene activation, lesion and neuroanatomical experiments, we have presently investigated the role of the superior colliculus (SC) in predatory hunting. First, we have shown that insect hunting is associated with a characteristic large increase in Fos expression in the lateral part of the intermediate gray layer of the SC (SCig). Next, we have shown that animals with bilateral NMDA lesions of the lateral parts of the SC presented a significant delay in starting to chase the prey and longer periods engaged in other activities than predatory hunting. They also showed a clear deficit to orient themselves toward the moving prey and lost the stereotyped sequence of actions seen for capturing, holding and killing the prey. Our Phaseolus vulgaris-leucoagglutinin analysis revealed that the lateral SCig, besides providing the well-documented descending crossed pathway to premotor sites in brainstem and spinal cord, projects to a number of midbrain and diencephalic sites likely to influence key functions in the context of the predatory behavior, such as general levels of arousal, motivational level to hunt or forage, behavioral planning, appropriate selection of the basal ganglia motor plan to hunt, and motor output of the primary motor cortex. In contrast to the lateral SC lesions, medial SC lesions produced a small deficit in predatory hunting, and compared to what we have seen for the lateral SCig, the medial SCig has a very limited set of projections to thalamic sites related to the control of motor planning or motor output, and provides conspicuous inputs to brainstem sites involved in organizing a wide range of anti-predatory defensive responses. Overall, the present results served to clarify how the different functional domains in the SC may mediate the decision to pursue and hunt a prey or escape from a predator. PMID:19825395

  14. Goal Representations Dominate Superior Colliculus Activity during Extrafoveal Tracking

    PubMed Central

    Hafed, Ziad M.; Krauzlis, Richard J.

    2009-01-01

    The primate superior colliculus (SC) has long been known to be involved in saccade generation. However, SC neurons also exhibit fixation-related and smooth-pursuit-related activity. A parsimonious explanation for these seemingly disparate findings is that the SC contains a map of behaviorally relevant goal locations, rather than just a motor map for saccades and fixation. This explanation predicts that SC activity should reflect the behavioral goal, even when the behavioral response is not fixation or saccades, and even if the goal does not correspond to a visual stimulus. We tested this prediction by employing a tracking task that dissociates the stimulus and goal locations. In this task, monkeys tracked the invisible midpoint between two peripheral bars, such that the visual stimuli were peripheral but the goal was foveal/parafoveal. We recorded from SC neurons representing peripheral locations associated with the stimulus or central locations associated with the goal. Most neurons with peripheral response fields did not respond differently during tracking than during passive viewing of the stimulus under fixation; most neurons with central response fields responded more during tracking than during fixation, despite the lack of a visual stimulus. Moreover, the spatial distribution of activity during tracking was larger than that during fixation or tracking of a foveal stimulus, suggesting that the greater spatial uncertainty about the invisible goal corresponded to more widespread SC activity. These results demonstrate the flexibility with which activity across the SC represents the location - and also the spatial precision - of behaviorally relevant goals for multiple eye movements. PMID:18799675

  15. New Observations at the Slate Islands Impact Structure, Lake Superior

    NASA Technical Reports Server (NTRS)

    Dressler, B. O.; Sharpton, V. L.; Schnieders, B.; Scott, J.

    1995-01-01

    Slate Islands, a group of 2 large and several small islands, is located in northern Lake Superior, approximately 10 km south of Terrace Bay. Shatter cones, breccias and shock metamorphic features provide evidence that the Slate Islands Structure was formed as a result of asteroid or comet impact. Most of the island group is believed to represent the central uplift of a complex impact crater. The structure possibly has a diameter of about 32 km. For Sage (1978, 1991) shock metamorphic features, shatter cones and pervasive rock brecciation are the results of diatreme activity. The present investigations represent the second year of a co-operative study of the Lunar and Planetary Institute, Houston, Texas and the Field Services Section (Northwest) of the Ontario Geological Survey. The objective of this investigation is to come to a better understanding of the formation of mid-size impact structures on Earth and the planets of the solar system. Impact processes played a fundamental role in the formation of the planets and the evolution of life on Earth. Meteorite and comet impacts are not a phenomenon of the past. Last year, more than 20 pieces of the Shoemaker-Levy 9 impacted on Jupiter and the Tunguska comet impacted in Siberia in the early years of this century. The study of impact processes is a relatively young part of geoscience and much is still to be learnt by detailed field and laboratory investigations. The State Islands Structure has been selected for the present detailed investigations because of the excellent shoreline outcrops of rock units related to the impact. The structure is a complex impact crater that has been eroded so that important lithological and structural elements are exposed. We know of no other mid-size terrestrial impact structure with equal or better exposures. In this publication we present preliminary results of our 1994 and 1995 field and laboratory investigations. We have tentatively identified a few impact melt and a considerable number of suevite occurrences.

  16. Coding of multisensory temporal patterns in human superior temporal sulcus

    PubMed Central

    Noesselt, Tömme; Bergmann, Daniel; Heinze, Hans-Jochen; Münte, Thomas; Spence, Charles

    2012-01-01

    Philosophers, psychologists, and neuroscientists have long been interested in how the temporal aspects of perception are represented in the brain. In the present study, we investigated the neural basis of the temporal perception of synchrony/asynchrony for audiovisual speech stimuli using functional magnetic resonance imaging (fMRI). Subjects judged the temporal relation of (a)synchronous audiovisual speech streams, and indicated any changes in their perception of the stimuli over time. Differential hemodynamic responses for synchronous versus asynchronous stimuli were observed in the multisensory superior temporal sulcus complex (mSTS-c) and prefrontal cortex. Within mSTS-c we found adjacent regions expressing an enhanced BOLD-response to the different physical (a)synchrony conditions. These regions were further modulated by the subjects' perceptual state. By calculating the distances between the modulated regions within mSTS-c in single-subjects we demonstrate that the “auditory leading (AL)” and “visual leading (VL) areas” lie closer to “synchrony areas” than to each other. Moreover, analysis of interregional connectivity indicates a stronger functional connection between multisensory prefrontal cortex and mSTS-c during the perception of asynchrony. Taken together, these results therefore suggest the presence of distinct sub-regions within the human STS-c for the maintenance of temporal relations for audiovisual speech stimuli plus differential functional connectivity with prefrontal regions. The respective local activity in mSTS-c is dependent both upon the physical properties of the stimuli presented and upon the subjects' perception of (a)synchrony. PMID:22973202

  17. (c) Consejo Superior de Investigaciones Cientficas Licencia Creative Commons 3.0 Espaa (by-nc)

    E-print Network

    Paris-Sud XI, Université de

    (c) Consejo Superior de Investigaciones Científicas Licencia Creative Commons 3.0 España (by Commons 3.0 España (by-nc) http://aespa.revistas.csic.es #12;(c) Consejo Superior de Investigaciones Científicas Licencia Creative Commons 3.0 España (by-nc) http://aespa.revistas.csic.es #12;(c) Consejo

  18. Is There a Limit to the Superiority of Individuals with ASD in Visual Search?

    ERIC Educational Resources Information Center

    Hessels, Roy S.; Hooge, Ignace T. C.; Snijders, Tineke M.; Kemner, Chantal

    2014-01-01

    Superiority in visual search for individuals diagnosed with autism spectrum disorder (ASD) is a well-reported finding. We administered two visual search tasks to individuals with ASD and matched controls. One showed no difference between the groups, and one did show the expected superior performance for individuals with ASD. These results offer an…

  19. Dissecting Aneurysm of the Superior Mesenteric Artery Successfully Treated by Endovascular Stent-Graft Placement

    SciTech Connect

    Ishida, Masaki, E-mail: mishida@clin.medic.mie-u.ac.jp; Kato, Noriyuki [MieUniversity Hospital, 2-174 Edobashi Tsu, Mie 514-8507, Department of Radiology (Japan); Hirano, Tadanori [Mie University Hospital, Mie, Department ofThoracic and Cardiovascular Surgery (Japan); Suzuki, Tomoaki; Shomura, Yu; Yada, Isao [Matsusaka General Hospital, Matsusaka, Department ofRadiology (Japan); Takeda, Kan [MieUniversity Hospital, 2-174 Edobashi Tsu, Mie 514-8507, Department of Radiology (Japan)

    2003-08-15

    Spontaneous and isolated dissecting aneurysm of the superior mesenteric artery is a rare event that has been successfully treated by surgery in several reported cases. To our knowledge, we present the first case of a patient with spontaneous and isolated dissecting aneurysm of the superior mesenteric artery that was successfully treated by endovascular stent-graft placement.

  20. Lake Trout ( Salvelinus namaycush) Populations in Lake Superior and Their Restoration in 1959–1993

    Microsoft Academic Search

    Michael J. Hansen; James W. Peck; Richard G. Schorfhaar; James H. Selgeby; Donald R. Schreiner; Stephen T. Schram; Bruce L. Swanson; Wayne R. MacCallum; Mary K. Burnham-Curtis; Gary L. Curtis; John W. Heinrich; Robert J. Young

    1995-01-01

    Naturally-reproducing populations of lake trout (Salvelinus namaycush) have been reestablished in most of Lake Superior, but have not been restored to 1929-1943 average abundance. Progress toward lake trout restoration in Lake Superior is described, management actions are reviewed, and the effectiveness of those actions is evaluated; especially stocking lake trout as a tool for building spawning stocks, and subsequently, populations

  1. 77 FR 37321 - Safety Zone, Barrel Recovery, Lake Superior; Duluth, MN

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-21

    ...Barrel Recovery, Lake Superior; Duluth, MN AGENCY: Coast Guard, DHS. ACTION: Temporary...Stoney Point and Brighton Beach, Duluth, MN. This safety zone is precautionary to protect...miles offshore on Lake Superior, Duluth, MN. This safety zone will be in effect...

  2. INFLUENCES OF HYDROLOGY ON NUTRIENT DYNAMICS IN LAKE SUPERIOR COASTAL WETLANDS

    EPA Science Inventory

    Little is known about the role of the coastal wetlands (CWs) of Lake Superior in modifying or contributing to nutrient fluxes from watersheds to the lake. We are studying factors controlling nutrient retention and transformation of CWs in Western Lake Superior. CWs may be unique ...

  3. Rare case report of Traumatic neuroma of anterior superior alveolar nerve associated with high frenal attachment.

    PubMed

    Ananthaneni, Anuradha; Srilekha, Namala; Guduru, Vijay Srinivas; Kiresur, Mohammad Asif

    2015-01-01

    We present an incredible case of traumatic neuroma (TN) in the anterior superior alveolar nerve leading to the swelling in the upper labial mucosa. This paper attempts to highlight the rarity of site of occurrence of this lesion and reports the first case of TN of anterior superior alveolar nerve. PMID:25972959

  4. LAKE-WETLAND LINKAGE AND PERIPHYTON DYNAMICS IN A LAKE SUPERIOR COASTAL WETLAND

    EPA Science Inventory

    Tributaries feeding coastal wetlands along the Wisconsin shore of Lake Superior are generally depleted in inorganic nitrogen (TIN) relative to phosphorus (SRP), while Lake Superior is phosphorous depleted and relatively rich in TIN. Within wetlands, mixing of tributary and lake w...

  5. Can spatial heterogeneity explain the perceived imbalance in Lake Superior's carbon budget? A model study

    E-print Network

    Wisconsin at Madison, University of

    is the largest lake in the world by surface area, containing 10% of the world's surface freshwater. Yet, little couple a hydrodynamic model of Lake Superior to an ecosystem model to understand the seasonal cycleCan spatial heterogeneity explain the perceived imbalance in Lake Superior's carbon budget? A model

  6. 33 CFR 162.110 - Duluth-Superior Harbor, Minnesota and Wisconsin.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Duluth-Superior Harbor, Minnesota and Wisconsin. 162.110 Section 162.110 Navigation and Navigable...REGULATIONS § 162.110 Duluth-Superior Harbor, Minnesota and Wisconsin. (a) No vessel greater than 100 feet in length may...

  7. 33 CFR 162.110 - Duluth-Superior Harbor, Minnesota and Wisconsin.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 false Duluth-Superior Harbor, Minnesota and Wisconsin. 162.110 Section 162.110 Navigation and Navigable...REGULATIONS § 162.110 Duluth-Superior Harbor, Minnesota and Wisconsin. (a) No vessel greater than 100 feet in length may...

  8. 33 CFR 162.110 - Duluth-Superior Harbor, Minnesota and Wisconsin.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 false Duluth-Superior Harbor, Minnesota and Wisconsin. 162.110 Section 162.110 Navigation and Navigable...REGULATIONS § 162.110 Duluth-Superior Harbor, Minnesota and Wisconsin. (a) No vessel greater than 100 feet in length may...

  9. 33 CFR 162.110 - Duluth-Superior Harbor, Minnesota and Wisconsin.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Duluth-Superior Harbor, Minnesota and Wisconsin. 162.110 Section 162.110 Navigation and Navigable...REGULATIONS § 162.110 Duluth-Superior Harbor, Minnesota and Wisconsin. (a) No vessel greater than 100 feet in length may...

  10. 33 CFR 162.110 - Duluth-Superior Harbor, Minnesota and Wisconsin.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 false Duluth-Superior Harbor, Minnesota and Wisconsin. 162.110 Section 162.110 Navigation and Navigable...REGULATIONS § 162.110 Duluth-Superior Harbor, Minnesota and Wisconsin. (a) No vessel greater than 100 feet in length may...

  11. Giftedness and evidence for reproducibly superior performance: an account based on the expert performance framework

    Microsoft Academic Search

    K. Anders Ericsson; Roy W. Roring; Kiruthiga Nandagopal

    2007-01-01

    Giftedness researchers have long debated whether there is empirical evidence to support a distinction between giftedness and attained level of achievement. In this paper we propose a general theoretical framework that establishes scientific criteria for acceptable evidence of superior reproducible performance, which any theory of exceptional performance must explain. We review evidence for superior reproducible performance, generally emerging only after

  12. Electrophysiologic Responses in Hamster Superior Colliculus Evoked by Regenerating Retinal Axons

    Microsoft Academic Search

    S. A. Keirstead; M. Rasminsky; Y. Fukuda; D. A. Carter; A. J. Aguayo; M. Vidal-Sanz

    1989-01-01

    Autologous peripheral nerve grafts were used to permit and direct the regrowth of retinal ganglion cell axons from the eye to the ipsilateral superior colliculus of adult hamsters in which the optic nerves had been transected within the orbit. Extracellular recordings in the superior colliculus 15 to 18 weeks after graft insertion revealed excitatory and inhibitory postsynaptic responses to visual

  13. Visual Properties of Neurons in a Polysensory Area in Superior Temporal Sulcus of the Macaque

    Microsoft Academic Search

    CHARLES BRUCE; ROBERT DESIMONE; CHARLES G. GROSS

    1981-01-01

    SUMMARY AND CONCLUSIONS 1. We recorded from single neurons in the dorsal bank and fundus of the anterior por- tion of the superior temporal sulcus, an area we term the superior temporal polysensory area (STP). Five macaques were studied under anesthesia ( N20) and immobilization in repeated recording sessions. 2. Almost all of the neurons were visually responsive, and over

  14. ESCUELA POLITCNICA SUPERIOR Ciudad Universitaria de Cantoblanco. 28049 Madrid. Telfono: 91-4972207

    E-print Network

    Autonoma de Madrid, Universidad

    ESCUELA POLITÉCNICA SUPERIOR Ciudad Universitaria de Cantoblanco. 28049 Madrid. Teléfono: 91 que informar. #12;ESCUELA POLITÉCNICA SUPERIOR Ciudad Universitaria de Cantoblanco. 28049 Madrid Gómez Pérez (CU-CCIA, Univ. Politécnica de Madrid). o Vocal 2º Titular: Pablo Castells Azpilicueta (TU

  15. LA BIBLIOTECA UNIVERSITARIA COMO APOYO AL APRENDIZAJE EN EL ESPACIO EUROPEO DE ENSEANZA SUPERIOR

    E-print Network

    Granada, Universidad de

    LA BIBLIOTECA UNIVERSITARIA COMO APOYO AL APRENDIZAJE EN EL ESPACIO EUROPEO DE ENSEÑANZA SUPERIOR proceso de transformación ante el Espacio Europeo de Educación Superior (EEES). Este nuevo marco implica bibliotecas universitarias deben adaptar sus espacios y servicios a las nuevas necesidades docentes

  16. Good genes and old age: Do old mates provide superior genes?

    Microsoft Academic Search

    T. F. Hansen; D. K. Price

    1995-01-01

    It has been suggested that female preference for older mates in species without parental care has evolved in response to an alleged higher genetic quality of older individuals. This is based on the widespread assumption that viability selection produces older individuals that are genetically superior to younger individuals. In contrast, we propose that the oldest individuals rarely are genetically superior.

  17. Why is visual search superior in autism spectrum disorder? Robert M. Joseph,1

    E-print Network

    underlies the superior visual search skills exhibited by individuals with autism spectrum disorder (ASD). WePAPER Why is visual search superior in autism spectrum disorder? Robert M. Joseph,1 Brandon Keehn,1) children in a standard static search task and a dynamic search task, in which targets and distractors

  18. WATER QUALITY AND BIOLOGICAL CONDITIONS OF GREAT LAKES COASTAL WETLANDS, WITH AN EMPHASIS ON LAKE SUPERIOR

    EPA Science Inventory

    This presentation will focus on MED's past and ongoing research in Lake Superior wetlands, and will include data on habitat, water quality, and biological condition of these systems. Comparisons of the condition of Lake Superior wetlands relative to those found around the Great ...

  19. NOAA Technical Memorandum ERL GLERL-58 LAKE SUPERIOR COOLING SEASON TEMPERATURE CLIMATOLOGY

    E-print Network

    and extreme temperatures over period of record. Table 51. Summary of Lake Superior, area 8, temperature period of record. Table 51. Summary of Lake Superior, area 11, temperature climatology and extreme profiles. Survey route and lake area locations. Mean survey temperature climatology and stages in cooling

  20. Teaching tracheal intubation: Airtraq is superior to Macintosh laryngoscope

    PubMed Central

    2014-01-01

    Background Tracheal intubation with Macintosh laryngoscope is taught to medical students as it is a lifesaving procedure. However, it is a difficult technique to learn and the consequences of intubation failure are potentially serious. The Airtraq optical laryngoscope is a relatively novel intubation device, which allows visualization of the glottic plane without alignment of the oral, pharyngeal, and tracheal axes, possessing advantages over Macintosh for novice personnel. We introduced a teaching mode featured with a progressive evaluation scheme for preparation and performance of tracheal intubation with medical students in this prospective randomized crossover trial who had no prior airway management experience to find the superior one. Methods Twenty-six medical students of the 8-year programme in the 6th year participated in this trial, when they did their one-week rotation in the department of anaesthesiology. Each of the students intubated 6 patients, who were scheduled for surgeries under general anaesthesia, each laryngoscope for 3 patients respectively. One hundred and forty-nine consecutive patients scheduled for surgical procedures requiring tracheal intubation were enrolled. Patients were randomly allocated to undergo tracheal intubation using Macintosh (n?=?75) or Airtraq (n =74) laryngoscope. The progressive evaluation scheme was applied to each intubation attempt. Results Intubation success rate was significantly higher in Airtraq group than Macintosh group (87.8% vs. 66.7%, P?

  1. Una fusión: ¿Necesidad o estrategia? (caso de estudio)

    Microsoft Academic Search

    Diana Teresa Diez C; Beatriz Eugenia Dussan; Liliana Estrada; Sandra Monsalve

    1998-01-01

    Este caso es real y está teniendo lugar actualmente en el sector financiero colombiano. La globalización de los mercados y la apertura del sector financiero en nuestro país, dieron lugar a una fuerte competencia no sólo entre las instituciones locales sino con la banca extranjera. Como respuesta a la situación del entorno, en el caso particular del Banco Industrial Colombiano

  2. CMU SCS ISRI CASOS Report Human and Organizational Risk Modeling *

    E-print Network

    CMU SCS ISRI CASOS Report i Human and Organizational Risk Modeling * CASOS Technical Report Craig of Social and Organizational Systems Abstract This report describes a study of human and organizational risk Model 4.3. Begin ISS Mission Control Model 5. Appendix A 6. Appendix B 7. Appendix C 8. Appendix D 9

  3. Forecasting Lake Effect Snow in Lake Superior region

    NSDL National Science Digital Library

    Bill Rose

    This exercise is designed to present the realistic problems of forecasting weather. Lake effect snows are hard to forecast because they depend on information that isn't part of the regular set of information and involve some pretty specific things that integrate the location of the site with surrounding environment. Even places close by can get totally different forecasts. When you have a regional forecast, it doesn't really address lake effect snows, unless the forecaster really focuses. So the exercise aims to show the value of broad critical thinking in meteorology, and it is very dramatic, because the difference between 36 inches and whiteout and clear blue sky is undeniable. The exercise comes when students are 8 weeks into the class. The class is an AMS based class, which has already been described well in this workshop by Julie Snow from Slippery Rock. Our class is given in the fall semester and lake effect snow starts in October and is quite an issue in forecasts until April. The skills of a forecaster are tested, and you cannot use forecasts from nearby areas reliably. Finally, we live in a fantastic snow belt, so lake effect snow happens a lot. In a good year we get over 300 inches of snow, mostly at times that places nearby do not. You can drive to Houghton in the bright sun and be met by a wall of very active blizzard just a few miles out of town. There are some excellent tutorials available from COMET, and outreach of the National Weather Service. I use one done by Greg Byrd, which is available online or in a power point format. There are a number of things that must be learned before forecasting. These include some fluid dynamics of plumes, latent heat, remote sensing, upper air mapping, and the use of models. We cannot cover all them completely. I try to introduce all these things and give people entry points into the juicy parts of these topics, but do not expect students to understand completely. One thing you can spend a long time on are the satellite images. Here is one, just to whet your interest: http://serc.carleton.edu/details/images/13586.html I have the students make a list of the critical parameters they think might be needed for a successful lake effect forecast. This is a challenge to prepare, but the idea is to include things that are even marginally useful and to collect data to see what is most important. We get a list of parameters like this: 850 mb wind direction 850 mb temperature Lake Superior surface temperature fetch length opposing bay? Inversion layer height topographic lift factor wind shear evidence upstream lake upstream moisture factor snow/ice cover issues This list is pretty good, but deliberately not complete, and we encourage students to add other things they think might be important. The next step is to find where you can get this information. I have web data sources for most (see below), and some of them are interrelated. You can do this exercise for any site around Lake Superior or probably many other lakes as well. For specific sites, the fetch length, upstream lake and opposing bay information are obtainable directly from the wind direction if you have a good map (Google Earth). So a spreadsheet for parameters related to wind direction can be prepared in advance and these parameters can be immediately available from the wind direction. Nonetheless the issue of sources for all this stuff must be addressed in an effort that spans several hours. The use of models is needed to look into the future where possible. Once students know what they are looking for and how to find it, the exercise starts its data collection. Every day or every 6 or 12 hours beginning when conditions get close to "LES favorable" students collect information on these LES predictors. They also make LES forecasts for each period and include that information in the spreadsheet. The next day the real snowfall data is added to the spreadsheet, and this can be used as validation data for the forecast. This data collection needs to be done for several weeks (November and December in my case, usually a good

  4. Spontaneous Recanalization of Superior Mesenteric Artery Occlusion Following Angioplasty and Stenting of Inferior Mesenteric Artery

    SciTech Connect

    Akpinar, Erhan, E-mail: eakp0@Lycos.com; Cil, Barbaros E.; Arat, Anil [Hacettepe University, Departments of Radiology (Turkey); Baykal, Atac; Karaman, Kerem [Hacettepe University, Departments of General Surgery (Turkey); Balkanci, Ferhun [Hacettepe University, Departments of Radiology (Turkey)

    2006-02-15

    An 84-year-old woman with a history of hypertension and coronary artery disease was admitted with a progressively worsening diffuse abdominal pain. Computed tomography scan of the abdomen and angiography revealed occlusion of the origin and proximal portion of superior mesenteric artery. Aortography also showed severe origin stenosis of inferior mesenteric artery and that the distal part of the superior mesenteric artery was supplied by a prominent marginal artery of Drummond. Patient was effectively treated with percutaneous transluminal angioplasty and stenting of the inferior mesenteric artery. Follow-up imaging studies demonstrated patency of the stent and spontaneous recanalization of superior mesenteric artery occlusion.

  5. La implantacion del enfoque constructivista en el aula de ciencia: Estudio de caso multiple

    NASA Astrophysics Data System (ADS)

    Arroyo Betancourt, Luz I.

    Esta investigacion estudia la implantacion del enfoque constructivista en tres aulas de ciencia del contexto puertorriqueno. Se auscultaron las practicas educativas que utilizan maestras consideradas constructivistas y la correspondencia de sus practicas educativas con los elementos esenciales de la didactica que proponen los teoricos de los planteamientos constructivistas. Se ausculto, ademas, a que vision del enfoque constructivista responden las expresiones de las maestras acerca de su practica educativa y como compara con su quehacer, a la luz de los elementos esenciales de las visiones constructivistas piagetiana, social y radical. Se utilizo el diseno de estudio descriptivo de caso multiple. El estudio se baso en entrevistas a profundidad, revision de documentos y observacion no participativa a la sala de clases. El contexto fueron tres escuelas publicas de la Region Educativa de San Juan, una elemental, una intermedia y una superior. Los resultados confirmaron que la transicion hacia el enfoque constructivista es un proceso que toma tiempo, dedicacion y la participacion en adiestramientos y readiestramientos acerca del nuevo enfoque. Las maestras coinciden en la mayoria de las practicas educativas que utilizan para implantar el enfoque constructivista de ensenanza y difieren en algunas debido, probablemente, a que han tenido que adaptarlas a los correspondientes niveles de ensenanza: elemental, intermedio y superior. Dos de las maestras planifican por conceptos generadores, mientras que una de ellas planifica siguiendo la guia que recibe del Departamento de Educacion. Difieren ademas, en el enfasis que confieren al inquirir cientifico. Con relacion a la correspondencia entre la vision manifestada por las maestras a la luz de las visiones piagetiana, social y radical, aparentemente, las preguntas del protocolo de entrevistas no lograron evocar la informacion con suficiente profundidad, por lo que la investigadora tuvo que inferir las visiones de las participantes basado en lo que estas manifestaron en su practica didactica. Dos maestras coinciden en una vision constructivista social de la construccion del conocimiento, del aprendizaje y de los metodos didacticos. La otra manifesto una vision constructivista piagetiana en el aprendizaje, los metodos didacticos y en la construccion del conocimiento. Se espera que este trabajo, ademas de promover los estudios de caso sobre el enfoque constructivista de ensenanza en el contexto puertorriqueno, sirva para que los maestros, que estan transformando su enfoque educativo de uno tradicional a uno constructivista, tengan una vision mas clara de la implantacion de este enfoque. Se espera ademas que sirva para que el Departamento de Educacion y sus programas de adiestramiento y readiestramiento en servicio, asi como las universidades y sus programas de preparacion de maestros, tomen en cuenta los resultados y recomendaciones de este estudio al revisar sus programas.

  6. Sunrise over Lake Superior. NRRI receives U.S. EPA funding for Great Lakes

    E-print Network

    Netoff, Theoden

    Sunrise over Lake Superior. NRRI receives U.S. EPA funding for Great Lakes Restoration Initiative research. Autumn 2010 From the Director Restoring the Great Lakes Protecting plants Future environmental

  7. HYDROMORPHIC DETERMINANTS OF AQUATIC HABITAT VARIABILITY IN LAKE SUPERIOR COASTAL WETLANDS

    EPA Science Inventory

    This manuscript evaluates patterns in water quality, water movement, substrate, and vegetation in 10 Lake Superior coastal wetlands in light of wetland hydrology and morphology. Water quality, substrate, and vegetation structure are important aspects of habitat for fishes that u...

  8. X-RAY DIFFRACTION AND ELECTRON BEAM ANALYSIS OF ASBESTIFORM MINERALS IN LAKE SUPERIOR WATERS

    EPA Science Inventory

    Western Lake Superior water, which is used for municipal water supplies, contains large concentrations of asbestiform amphibole fibers because of a taconite tailings discharge at Silver Bay, Minnesota. Large fluctuations in fiber concentrations are attributable to seasonal and me...

  9. Influence of pristine SWNTs in supramolecular hydrogelation: scaffold for superior peroxidase activity of cytochrome c.

    PubMed

    Kar, Tanmoy; Mandal, Subhra Kanti; Das, Prasanta Kumar

    2012-08-28

    The influence of pristine SWNTs in supramolecular hydrogelation of amphiphilic dipeptide carboxylates is delineated. The developed SWNT-nanohybrids with notable mechanical strength act as a scaffold for superior peroxidase activity of cytochrome c in organic media. PMID:22796903

  10. Eye opening and PSD95 are required for long-term potentiation in developing superior colliculus

    E-print Network

    Zhao, Jian-Ping

    The only major glutamate receptor membrane-associated guanylate kinase scaffolds expressed in the young superficial superior colliculus (SC) are synapse-associated protein 102 (SAP102) and postsynaptic density protein 95 ...

  11. Geologic Field Investigation: Investigating Coastal Features of Western Lake Superior, Inferring Possibilities of their Origins

    NSDL National Science Digital Library

    Paul Davis

    This geologic investigation will have students observing and investigating coastal features of Western Lake Superior using inquiry-based investigable questions, and inferring possibilities of the coastal features' origins.

  12. ILMO. SR. DIRECTOR DE LA ESCUELA POLITCNICA SUPERIOR DE LA UNIVERSIDAD AUTNOMA DE MADRID

    E-print Network

    Autonoma de Madrid, Universidad

    ILMO. SR. DIRECTOR DE LA ESCUELA POLITÉCNICA SUPERIOR DE LA UNIVERSIDAD AUTÓNOMA DE MADRID Madrid EXPONE: Que tiene registrado y autorizado con fecha ___________ el Anteproyecto titulado primeras hojas, así como la Introducción y Conclusiones del Cuerpo del Proyecto. Madrid, ...... de

  13. ILMO. SR. DIRECTOR DE LA ESCUELA POLITCNICA SUPERIOR DE LA UNIVERSIDAD AUTNOMA DE MADRID

    E-print Network

    Autonoma de Madrid, Universidad

    ILMO. SR. DIRECTOR DE LA ESCUELA POLITÉCNICA SUPERIOR DE LA UNIVERSIDAD AUTÓNOMA DE MADRID Madrid EXPONE: Que tiene registrado y autorizado el Anteproyecto titulado mencionado Proyecto Fin de Carrera. Madrid, ...... de ...................... de 200... (Firma del estudiante

  14. Extensive superior limbic keratoconjunctivitis in Graves’ disease: case report and mini-review of the literature

    PubMed Central

    Chelala, Elias; El Rami, Hala; Dirani, Ali; Fakhoury, Henry; Fadlallah, Ali

    2015-01-01

    Background Superior limbic keratoconjunctivitis (SLK) is characterized as an inflammation of the superior bulbar conjunctiva with predominant involvement of the superior limbus and adjacent epithelial keratitis. Methods A 51-year-old woman, with a history of medically controlled Graves’ disease was seen with an extensive SLK involving 5 mm of the superior cornea. Results Total remission was observed with topical steroids (DXM). Recurrence was observed 1 week after steroid discontinuation, and steroidal treatment was reintroduced with tapering over 1 month. Total remission was then observed for 1 year. Conclusion Extensive keratitis and vascular pannus in SLK is rarely reported. This form could be treated with topical steroids. Tapering treatment remains essential for long-term success. PMID:25792798

  15. 75 FR 63086 - Drawbridge Operation Regulations; Duluth Ship Canal (Duluth-Superior Harbor).

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-14

    ...Drawbridge Operation Regulations; Duluth Ship Canal (Duluth- Superior Harbor). AGENCY...regulation governing the operation of the Duluth Ship Canal Aerial Bridge at Mile 0.1 over the Duluth Ship Canal, at Duluth, MN, for scheduled...

  16. INTELIGENCIA EMOCIONAL Y DESEMPEÑO LABORAL EN LAS INSTITUCIONES DE EDUCACIÓN SUPERIOR PÚBLICAS Emotional intelligence and Labour Performance at the Directive Level in the Public superior institutions

    Microsoft Academic Search

    María Carolina Araujo; Martín Leal Guerra

    The intention of this research was to determine the relation between Emotional Intelligence and the Labour Performance at the Directive Level in the Public Superior Institutions from the Trujillo state. It was sustained theoretically in the expositions of Goleman (1995, 1996, 2000), Chiavenato (2002), Robbins (2004) and Benavides (2002). The investigation was of the positivist paradigm. The applied methods were:

  17. Rationale for and Methods of Superiority, Noninferiority, or Equivalence Designs in Orthopaedic, Controlled Trials

    Microsoft Academic Search

    Patrick Vavken

    Background  To provide value-based healthcare in orthopaedics, controlled trials are needed to assess the comparative effectiveness of\\u000a treatments. Typically comparative trials are based on superiority testing using statistical tests that produce a p value.\\u000a However, as orthopaedic treatments continue to improve, superiority becomes more difficult to show and, perhaps, less important\\u000a as margins of improvement shrink to clinically irrelevant levels. Alternative

  18. Superior sagittal sinus thrombosis: a rare complication in a child with nephrotic syndrome

    Microsoft Academic Search

    Avinoam Pirogovsky; Meital Adi; Amit Dagan; Levana Sinai; Dalia Sthoeger; Naphtali Barzilai; Elvan Tabachnik

    2001-01-01

    .   A 2-year-old boy with new-onset nephrotic syndrome developed recurrent vomiting, apathy and papilloedema. Superior sagittal\\u000a sinus thrombosis was diagnosed on cranial CT and MRI. He gradually recovered after treatment with heparin, fresh frozen plasma\\u000a and warfarin with complete resolution of the thrombosis after 1 month. Superior sagittal sinus thrombosis is an extremely\\u000a rare complication of nephrotic syndrome in children.

  19. Low Reproductive Rates of Lake Superior Bald Eagles: Low Food Delivery Rates or Environmental Contaminants?

    Microsoft Academic Search

    Cheryl R. Dykstra; Michael W. Meyer; D. Keith Warnke; William H. Karasov; David E. Andersen; William W. Bowerman IV; John P. Giesy

    1998-01-01

    Reproductive rate (productivity) of bald eagles (Haliaeetus leucocephalus) nesting on the shores of Lake Superior was significantly less than that of neighboring eagles nesting in inland Wisconsin (1.0 vs. 1.3 young per breeding attempt, 1989–1993), and at other inland lake\\/riverine habitats in the Great Lakes Basin. It is possible that the current causes of low productivity on Lake Superior might

  20. Superior thyroid artery lesion after US-Guided chemical parathyroidectomy: Angiographic diagnosis and treatment by embolization

    Microsoft Academic Search

    Franco Perona; Antonio Barile; Michele Oliveri; Piergiorgio Quadri; Carlo Ferro

    1999-01-01

    A 71-year-old woman presented with a life-threatening thyroid hemorrhage after US-guided chemical parathyroidectomy. The diagnosis\\u000a was made by angiography followed by immediate embolization of a pseudoaneurysm of the left superior thyroid artery. Embolization\\u000a controlled the hemorrhage, obviating the need for surgery. The patient made a full recovery with no evidence of further hemorrhage.\\u000a Pseudoaneurysm of the superior thyroid artery is