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1

Ultrasound Detection of Superior Vena Cava Thrombus  

PubMed Central

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

Birch, Aaron; Um, David; Laselle, Brooks

2014-01-01

2

Ultrasound detection of superior vena cava thrombus.  

PubMed

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

Birch, Aaron; Um, David; Laselle, Brooks

2014-09-01

3

[Cardiac resynchronization through a persistent left superior vena cava].  

PubMed

Cardiac resynchronization therapy is effective in the treatment of patients with severe heart failure and intraventricular dysynchrony. However, we are sometimes faced with the unexpected presence of a persistent left superior vena cava. We report the case of a patient with dilated cardiomyopathy and left ventricular dysynchrony in which we implanted a resynchronization pacemaker exclusively through a persistent left superior vena cava that did not communicate with the right vena cava. PMID:17194405

Moriña-Vázquez, P; Barba-Pichardo, R; Venegas Gamero, J; Herrera Carranza, M

2006-12-01

4

Bilateral Absence of the Superior Vena Cava  

PubMed Central

Bilateral absence of the superior vena cava (SVC) is a very rarely detected, mainly asymptomatic congenital vascular anomaly. Though usually innocent, this anomaly may complicate cardiothoracic surgery and certain procedures like central venous catheter insertion. This SVC anomaly is poorly known, and we assume that its incidence in the general population may be higher than detected. In this paper, we summarize current knowledge on this anomaly and its clinical implications. In addition, we present a neonatal case with bilateral absence of the SVC associated with a fetal cystic hygroma. Conclusion. Totally absent SVC can cause unexpected problems during cardiothoracic surgery. Suspicion of SVC absence should arise in basic echocardiography. Our paper suggests that, like other congenital anomalies, bilateral absent SVC may be associated with a fetal cyctic hygroma. PMID:24826253

Ylänen, Kaisa; Poutanen, Tuija; Savikurki-Heikkilä, Päivi; Uotila, Jukka; Korppi, Matti; Eerola, Anneli

2012-01-01

5

RESEARCH Open Access Comparison of superior vena cava and  

E-print Network

. 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

6

Chemoradiation-induced superior vena cava syndrome: A case report  

PubMed Central

A case of a 54-year-old man who developed superior vena cava syndrome secondary to vascular fibrosis, 30 months after radical chemoradiation for stage III non-small cell lung cancer, is presented. The literature regarding the etiology, diagnosis and treatment of this rare entity is discussed. PMID:19107246

Castonguay, Mathieu; Rodrigues, George; Vincent, Mark; Malthaner, Richard A; Guo, Lin-Ruo

2008-01-01

7

Malignant Superior Vena Cava Syndrome: Is This a Medical Emergency?  

Microsoft Academic Search

Background: Superior vena cava syndrome (SVCS) is an association with a variety of benign and malignant etiologies. The aim of this study was to evaluate if malignant SVCS is a real medical emergency or if we are able to obtain a definite histological diagnosis before chemo- radiotherapy. Materials and Methods: In this prospective case series study, we have evaluated epidemio-

Reza Bagheri; Mohammadbagher Rahim; Fariba Rezaeetalab; Hadi Akbari; Reza Shojaian

8

Malignant solitary fibrous tumor with superior vena cava syndrome  

Microsoft Academic Search

Mediastinal solitary fibrous tumors, particularly those that are malignant, are rare. We report a case of malignant solitary\\u000a fibrous tumor with superior vena cava syndrome and highly aggressive behavior. Postoperative radiotherapy was performed due\\u000a to incomplete resection, but the tumor relapsed within 4 months. Gemcitabine-based chemotherapy was ineffective.

Satoshi Shiono; Masami Abiko; Gen Tamura; Toru Sato

2009-01-01

9

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

PubMed Central

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

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

2006-01-01

10

[Adequate venous autoplasty in severe superior vena cava syndrome].  

PubMed

Eleven patients underwent plastic operations on the superior vena cava (SVC) in its severe occlusion. The SVC syndrome was caused by malignant tumors of the right lung and mediastinum in 9 patients, lymphogranulomatosis in one patient, and by chronic fibrous mediastinitis in another patient. The SVC and its main branches were replaced by a multisegmental graft (lineal or bifurcation) of autogenous vein formed by parallel stitching together of 3-5 longitudinally cut segments of the vena saphena magna. Venous drainage was adequate and the graft remained unobstructed for a long time due to the anatomical conformity of the graft to the SVC and the equal diameters of the joined vessels. The immediate and late-term (3 to 26 months) results of plastics with a multisegmental graft or autogenous vein were good. PMID:2687134

Babliak, D E; Averchuk, V G

1989-01-01

11

Superior vena cava obstruction associated with nephrogenic systemic fibrosis.  

PubMed

A 56-year-old woman with hypertension-induced end stage renal disease presented with skin thickening and mottled discoloration. Cutaneous biopsy showed increased dermal fibroblasts embedded in fibromyxoid stroma with scattered perivascular and interstitial mononuclear cells. Immunohistochemistry revealed prominent CD34+ dendritic cells in septal spaces, consistent with Nephrogenic Systemic Fibrosis (NSF). Seven years and two years prior she had received a gadolinium-based contrast agent (GBCA). She died due to NSF. Gross autopsy revealed a thickened and stenotic superior vena cava (SVC). Extensive fibrosis of the SVC, dermis, and subcutaneous tissue was noted, together with hyalinized collagen fibers within the muscular wall of the intestines and dura mater. These findings support the importance of skin changes in the recognition of life threatening extracutaneous tissue involvement in NSF. PMID:24809889

Holzem, Kassandra E; Nardone, Beatrice; Lomasney, Jon W; Yazdan, Pedram; Gerami, Pedram; West, Dennis P; Laumann, Anne E

2014-05-01

12

A case of mediastinal seminoma presenting as superior vena cava syndrome.  

PubMed

Primary mediastinal seminoma is a rare tumor usually with nonspecific symptoms such as chest pain, dyspnea and hoarseness, but superior vena cava syndrome (SVCS) is an extremely uncommon syndrome. We report a 25-year-old man who presented with superior vena cava syndrome for 1 month and a 1-week history of retrosternal chest pain. Thorax computerized tomography demonstrated a soft tissue mass in the anterior mediastinum with stippled calcifications compressing the superior vena cava and other major vessels. Transthoracic biopsy showed primary seminoma of the anterior mediastinum. Combined chemoradiotherapy was performed and the patient was considered to have a partial response to treatment. PMID:22687803

Xu, Xue; Sun, Chengtao; Zhang, Lei; Liang, Jiangjiu

2012-01-01

13

Acute thrombotic occlusion of the superior vena cava treated successfully by emergency thrombectomy  

PubMed Central

We report the first recorded case of acute thrombotic occlusion of the superior vena cava successfully treated by disobliterative thrombectomy. The caval thrombosis was caused by the infusion into the superior vena cava, over a period of six days, of fluids, electrolytes, aminoacids, concentrated carbohydrates, and antibiotics. Over a period of four hours, the patient became moribund due to the development of the `wet brain syndrome'. Disobliterative caval thrombectomy, performed as an emergency procedure, resulted in immediate and permanent relief. Images PMID:5144654

Ketharanathan, V.; McConchie, Ian; Mullerworth, Michael

1971-01-01

14

Coronary artery bypass grafting with absent right superior vena cava in visceroatrial situs solitus  

Microsoft Academic Search

We report on a 63-year-old man with an absence of right superior vena cava in visceroatrial situs solitus who underwent coronary\\u000a artery bypass grafting. Preoperative echocardiography showed a dilated coronary sinus, and venography confirmed an absent\\u000a right and a persistent left superior vena cava. Perioperatively, placement of a pulmonary artery catheter, site of venous\\u000a cannulation, and management of associated rhythm

Kazuhiro Kurisu; Yoshie Ochiai; Hiroshi Kumeda; Satoshi Kimura; Kenichiro Tanaka; Ryuji Tominaga

2004-01-01

15

Superior vena cava replacement in thymic tumours treated with radio-chemotherapy.  

PubMed

From 1987 to 2000 108 patients were operated on for thymic tumours. Two of these underwent replacement of the superior vena cava with polytetrafluoroethylene prostheses because the tumours invaded the superior vena cava. One of these was affected by myasthenia gravis, and was treated preoperatively with concurrent radio-chemotherapy and lymphocytopheresis. The other received preoperative chemotherapy and post-operative radio-chemotherapy because of minimal residual disease. The clinical courses of the two patients are reported here and we conclude that eradication of thymic malignancies is suitable even when superior vena cava replacement is required, and that neither antimyasthenic therapy nor adjuvant and/or neoadjuvant treatment interfere with aggressive surgical management or vice versa. Moreover, the long-term survival of one of these patients despite relapse of disease shows that extended surgery is indicated in these cases. PMID:15916142

Muscolino, Giuseppe; Doria, Orietta; Vercellio, Gianni

2005-01-01

16

Effect of phenylephrine on focal atrial fibrillation originating in the pulmonary veins and superior vena cava  

Microsoft Academic Search

OBJECTIVESThis study was aimed at evaluating the effects of phenylephrine infusion on the occurrence of focal atrial fibrillation (AF).BACKGROUNDParoxysmal AF can be initiated by ectopic atrial beats originating in the pulmonary vein (PV) or superior vena cava (SVC). The effect of change in autonomic tone on this focal AF is unknown.METHODSThis study included 12 patients with frequent bursts of AF

Ching-Tai Tai; Chuen-Wang Chiou; Zu-Chi Wen; Ming-Hsiung Hsieh; Chin-Feng Tsai; Wei-Shiang Lin; Chien-Cheng Chen; Yung-Kuo Lin; Wen-Chung Yu; Yu-An Ding; Mau-Song Chang; Shin-Ann Chen

2000-01-01

17

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

SciTech Connect

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.

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

18

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

PubMed Central

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

2012-01-01

19

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

PubMed

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 with the standard stylets, use of the Worley sheath aided successful lead deployment. We conclude that when used appropriately, the Worley sheath is a tool that could be helpful in pacing lead placement in patients with persistent left superior vena cava. PMID:17267517

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

2007-03-01

20

Absent right and persistent left superior vena cava: troubleshooting during a challenging pacemaker implant: a case report  

PubMed Central

Background Venous anomalies of the thorax can occur in isolation or in association with complex congenital heart disease. The incidence of an absent right superior vena cava in the setting of a persistent left superior vena cava is very rare in the general population with only a dozen cases documented in the medical literature. Such venous anomalies can make for very challenging electronic cardiac device implantation. We report our challenging dual chamber pacemaker implant in a patient with such complex anatomy and focus on our implantation technique that helped achieve adequate lead positioning. Case presentation A 73-year-old Caucasian female with degenerative complete heart block presented for dual chamber permanent pacemaker implant. Lead implantation was very challenging due to abnormal and rare vena cava anatomy; a persistent left superior vena cava drained directly into the coronary sinus and the right brachiocephalic vein drained directly into the left persistent superior vena cava as the patient had an absent right superior vena cava . Adequate right ventricular lead positioning was achieved following numerous lead-stylet manipulations and careful looping in the atria to redirect its trajectory to the ventricular apex. Conclusion Abnormal superior vena cava development is uncommon and can lead to technical challenges when venous access is required during various interventional procedures. Pre-operative imaging can help identify such challenging anatomy allowing appropriate operative planning; careful patient selection is warranted for venography given the risk of contrast nephrotoxicity. PMID:25047923

2014-01-01

21

Persistent Left Superior Vena Cava Identified During Central Line Placement: A Case Report  

PubMed Central

Introduction A persistent left superior vena cava is found in 0.3–0.5% of the general population and in up to 10% of patients with a congenital cardiac anomaly. It is the most common thoracic venous anomaly and is usually asymptomatic. Being familiar with such anomaly could help clinicians avoid complications during placement of central lines, Swan-Ganz catheters, PICC lines, dialysis catheters, defibrillators, and pacemakers. Case Presentation We describe a case of persistent left superior vena cava that was noted after placement of a central line. Mr JJ is a 41 year old African American man who was hospitalized for evaluation and management of alcoholic necrotizing pancreatitis. He required multiple central lines placements. He was noted to have a persistent left superior vena cava that was not recognized initially and thus lead to an unnecessary extra central line placement. Discussion This anatomic variant may pose iatrogenic risks if it is not recognized by the clinician. A central catheter that tracks down the left mediastinal border may also be in the descending aorta, internal thoracic vein, superior intercostal vein, pericardiophrenic vein, pleura, pericardium, or mediastinum. Conclusion Our case is significant because the patient had two extra central venous catheter placements. This case strongly demonstrates the importance of knowing the thoracic venous anomalies. PMID:22121390

Fares, Wassim H.; Birchard, Katherine R.; Yankaskas, James R.

2010-01-01

22

Radiation-induced leiomyosarcoma of the great vessels presenting as superior vena cava syndrome  

SciTech Connect

A patient with a pleomorphic intravascular leiomyosarcoma of the great vessels of the neck and mediastinum presented clinically with a superior vena cava syndrome. A latent period of 29 years elapsed between receiving orthovoltage radiation to the neck and right side of chest to treat recurrent ganglioneuroblastoma, and the appearance of a leiomyosarcoma and subsequent recurrences. The patient underwent partial resection of the tumor, received adjunct chemotherapy, and was shown to be free of disease by clinical tests and by magnetic resonance imaging (MRI) 17 months after completion of chemotherapy. The criteria for the diagnosis of radiation-induced sarcomas are reviewed in relation to the present case. The critical role of magnetic resonance imaging in both the diagnosis and continued follow-up of the patient is described. This would appear to be the first reported case of radiation-induced intravascular leiomyosarcoma of the great vessels of the neck and mediastinum presenting as a superior vena cava syndrome.

Weiss, K.S.; Zidar, B.L.; Wang, S.; Magovern, G.J. Sr.; Raju, R.N.; Lupetin, A.R.; Shackney, S.E.; Simon, S.R.; Singh, M.; Pugh, R.P.

1987-09-15

23

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

SciTech Connect

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

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

2012-06-15

24

Superior vena cava syndrome: Relief with a modified saphenojugular bypass graft  

Microsoft Academic Search

Superior vena cava (SVC) syndrome is a disabling and potentially life-threatening complication. SVC revascularization can be achieved by means of endovascular or direct surgical reconstructions. In the patient on whom we report, these two options were not possible, and a peripheral venous bypass grafting procedure was done with a technical innovation. Right upper-extremity swelling developed in a 55-year-old woman after

Jean M. Panneton; James C. Andrews; Jan M. Hofer

2001-01-01

25

Left main coronary artery fistula to the right atrium and superior vena cava: case report and review of the literature.  

PubMed

A unique arteriovenous fistula, originating from the left main coronary artery and branching to drain into the right atrium and superior vena cava is presented with review of the literature. PMID:21070354

Hassan, Mohammed; Gologorsky, Edward; Ricci, Marco; Salerno, Tomas; Panos, Anthony L

2010-11-01

26

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

SciTech Connect

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

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

2011-02-15

27

Superior vena cava syndrome due to metastasis from urothelial cancer: A case report and literature review.  

PubMed

Superior vena cava (SVC) syndrome is caused by compression or obstruction of the SVC. We report here in a case of SVC syndrome due to lymph node metastasis from urothelial cancer to the mediastinum and lung. The origin of metastasis was determined by computed tomography (CT)-guided biopsy of metastases. After radiotherapy to the mediastinum with glucocorticoid failed, anticancer pharmacotherapy including paclitaxel, gemicitabine, and cisplatin proved effective and SVC syndrome resolved. But patient died from cerebral bleeding from newer brain metastases 10 months later. PMID:24311914

Wakeda, Hironobu; Hamasuna, Ryoichi; Asada, Yujiro; Kamoto, Toshiyuki

2013-10-01

28

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

PubMed Central

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

2014-01-01

29

Seminoma with bronchial involvement and superior vena cava syndrome: a rare combination.  

PubMed

We describe the case of a 45-year-old male who was admitted with clinical signs of superior vena cava syndrome (SVCS). Physical examination showed collar of Stokes and extensive collateral circulation in the neck and anterosuperior thoracic region, as well as a large testicular mass. Fibrobronchoscopy revealed an endobronchial tumour, histopathologically diagnosed as seminoma, with the same characteristics as the testicular biopsy. Treatment was initiated with surgery, chemotherapy and radiotherapy, resulting in a major clinical improvement. We indicate the importance of considering SVCS as an entity related with less common neoplasms such as germ cell tumours. PMID:24064342

Landete, Pedro; Chiner, Eusebi; Sancho-Chust, José N; Sánchez-Valverde, M Dolores; Pérez-Ferrer, Patricia; Bravo-Fernández, Rodrigo

2014-05-01

30

Extrinsic compression of superior vena cava: an analysis of 41 patients  

SciTech Connect

A retrospective analysis was made of 41 patients with extrinsic compression of the superior vena cava who were treated at the University of Illinois Hospital, Mercy Hospital and Columbus Hospital between 1967 and 1977. Small cell carcinoma was the predominant histological variety. The mode of presentation (acute versus subacute) was found to be an important prognostic factor: 47% of patients with acute presentation responded to treatment compared to 79% of patients with subacute onset. Chemotherapy given concomitantly with radiotherapy did not produce better results than radiotherapy alone.

Kanji, A.M. (Univ. of Illinois Hospital, Chicago); Chao, J.H.; Liebner, E.J.; Lobo, P.; Thakrar, H.V.

1980-02-01

31

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

SciTech Connect

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

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

2013-02-15

32

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

SciTech Connect

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.

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

33

A giant cardiac malignant peripheral nerve sheath tumor presenting with total obstruction of the superior vena cava.  

PubMed

A 16-year-old boy presenting with dyspnea, facial swelling, cyanosis, and fatigue was found to have a tumor involving the heart, causing superior vena cava and brachiocephalic venous trunk total obstruction. This was diagnosed as malignant peripheral nerve sheath tumor, a rare sarcoma of the heart. The patient underwent successful resection of the tumor, and reconstruction of the superior vena cava and right atrium. Immunohistochemistry was utilized to establish the diagnosis. The details of the patient's clinical course and imaging findings with morphologic and immunohistochemistry data are reported. PMID:24384222

Prifti, Edvin; Baboci, Arben; Ikonomi, Majlinda

2014-01-01

34

External compression of superior vena cava after the replacement of ascending aorta.  

PubMed

We present a rare complication after open-heart surgery resulting in compression of the superior vena cava (SVC) with the concurrent findings of the hypertrophic obstructive cardiomyopathy physiology. A 59-year-old woman developed a low cardiac output syndrome, persistent hypotension, and increasing filling pressures after emergency replacement of the ascending aorta and resuspension of the aortic valve due to a type A aortic dissection. Transesophageal echocardiography (TEE) evaluation revealed partial SVC obstruction, under-filled left ventricle (LV), and a persistent mitral systolic anterior motion with increasing pressure gradient in the left ventricular outflow tract (LVOT). Surgical exposure uncovered an intrapericardial thrombus around the aortic graft compressing the SVC. Removal of the thrombus resulted in immediate haemodynamic improvement and elimination of both SVC and LVOT obstructions. A comprehensive TEE exam should always be performed, and all the structures should be visualized for the proper diagnosis and management of patients after cardiac surgery. PMID:18490312

Wacker, Johannes; Djaiani, George; Katznelson, Rita; Karski, Jacek

2008-07-01

35

Successful Venous Angioplasty of Superior Vena Cava Syndrome after Heart Transplantation  

PubMed Central

Introduction. For patients with terminal heart failure, heart transplantation (HTX) has become an established therapy. Before transplantation there are many repeated measurements with a pulmonary artery catheter (PAC) via the superior vena cava (SVC) necessary. After transplantation, endomyocardial biopsy (EMB) is recommended for routine surveillance of heart transplant rejection again through the SVC. Case Presentation. In this report, we present a HTX patient who developed a SVC syndrome as a possible complication of all these procedures via the SVC. This 35-year-old Caucasian male could be successfully treated by balloon dilatation/angioplasty. Conclusion. The SVC syndrome can lead to pressure increase in the venous system such as edema in the head and the upper part of the body and further serious complications like cerebral bleeding and ischemia, or respiratory problems. Balloon angioplasty and stent implantation are valid methods to treat stenoses of the SVC successfully. PMID:25161772

Strecker, Thomas; Zimmermann, Iris; Heinz, Marco; Rosch, Johannes; Agaimy, Abbas; Weyand, Michael

2014-01-01

36

Obstruction of the superior vena cava or subclavian veins: Sonographic diagnosis  

SciTech Connect

The normal subclavian vein shows a respiratory rhythmicity on sonograms and responds to a sudden sniff maneuver by collapsing in a rapid, transient manner secondary to the sudden decrease in intrathoracic pressure. Of 11 patients studied using ultrasound (US) for possible superior vena cava (SVC) obstruction, five patients with proved SVC obstruction had no response of the enlarged subclavian veins to respiratory maneuvers. One patient with a partial obstruction had a minimal response on one side. Two patients with isolated subclavian vein obstructions had no response on the affected side and a normal response on the contralateral side. Three patients proved not to have SVC obstruction had normal responses. Sonography of the subclavian veins may be an effective, indirect screening technique for the presence of SVC obstruction and can also be used to evaluate the patency of the subclavian vein, although the the sensitivity and specificity of the method remain to be determined from a larger, prospective study.

Gooding, G.A.W.; Hightower, D.R.; Moore, E.H.; Dillon, W.P.; Lipton, M.J.

1986-06-01

37

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

PubMed Central

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

Atwal, Swapndeep Singh; Garga, Umesh Chandra

2014-01-01

38

Dermatofibrosarcoma protuberans on the right neck with superior vena cava syndrome: case report and literature review.  

PubMed

Dermatofibrosarcoma protuberans (DFSP) is an uncommon dermal soft tissue tumour of intermediate malignancy. A 44-year-old man presented to the hospital with a large lesion on the right upper chest and neck. Despite eight previous surgical excisions, the tumour had continued to recur. Contrast-enhanced computed tomography showed recurrence of the tumour, associated with superior vena cava (SVC) syndrome. He declined radical surgical resection of the recurrent tumour, which may have required right upper limb amputation. Targeted therapy with sunitinib malate was therefore introduced. This case demonstrates the recurrent nature of DFSP and the association of this lesion on the upper chest/neck with SVC syndrome. Primary wide radical resection is essential for better local control and to avoid the development of SVC syndrome. PMID:23535006

Ong, H S; Ji, T; Wang, L Z; Yu, Z W; Zhang, C P

2013-06-01

39

Comparison of mitral inflow and superior vena cava Doppler velocities in chronic obstructive pulmonary disease and constrictive pericarditis  

Microsoft Academic Search

Objective. This study was conducted to determine whether Doppler recording of superior vena cava flow velocities can differentiate chronic obstructive pulmonary disease from constrictive pericarditis in patients with a respiratory variation of ?25% in mitral inflow E velocity.Background. Although respiratory variation (?25%) in mitral E velocity is the main diagnostic criterion for constrictive pericarditis by Doppler echocardiography, it can also

Smonporn Boonyaratavej; Jae K Oh; A. Jamil Tajik; Christopher P Appleton; James B Seward

1998-01-01

40

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

SciTech Connect

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

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

2011-02-15

41

[Anomalous right upper pulmonary venous drainage into the superior vena cava with coexistence sinus venosus atrial septal defect (ASD)].  

PubMed

Article presents a case of a 71-year old woman with pulmonary right upper venous drainage into the superior vena cava and with coexistence sinus venous type Atrial Septal Defect (ASD) which was revealed as interesting finding in multislices computed tomography angiography during estimation of coronary arteries. PMID:23944110

Laskowicz, Bartosz; Urba?czyk-Zawadzka, Ma?gorzata; Krupi?ski, Maciej; Konieczy?ska, Ma?gorzata; Irzyk, Ma?gorzata; Bany?, Robert Pawe?; Machnik, Roman; Urbanik, Andrzej

2013-01-01

42

Mediastinal seminoma presenting as superior vena cava syndrome and tracheal obstruction.  

PubMed

Malignant germ cell tumours of the mediastinum are rare, presenting mostly in young males. These are bulky tumours, mostly intrathoracic, infiltrating into adjacent structures early in the growth process. Patients may present with symptoms of compression. Occasionally, mediastinal adenopathy and superior vena cava (SVC) syndrome may occur. We discuss a case of a 19 year old boy with six weeks history of progressively worsening shortness of breath and mid-sternal chest heaviness and one month history of swelling of the face and upper limbs. The entire face and upper extremities were grossly oedematous with engorged veins suggesting SVC syndrome. CT scan chest showed a large mediastinal mass 18 x 24 cm extending from the superior mediastinum to the mid pericardial area. The trachea was extrinsically compressed to almost 80% at its distal portion. Mass was resected completely. Post operative course was unremarkable. The final histopathology showed a fibrotic mass with no viable tumour. Surgery followed by radiation therapy has been the usual initial treatment with multimodal chemotherapy showing remarkable results. PMID:21381621

Fatimi, Saulat Hasnain; Shahid, Basma; Hanif, Hashim Muhammad; Muzaffar, Marium

2010-10-01

43

Pulmonary hilar lymph node metastasis of breast cancer induced bronchopleural fistula and superior vena cava syndrome.  

PubMed

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

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

2014-01-01

44

Fibrin Sheath Angioplasty: A Technique to Prevent Superior Vena Cava Stenosis Secondary to Dialysis Catheters  

PubMed Central

Fibrin sheaths are a heterogeneous matrix of cells and debris that form around catheters and are a known cause of central venous stenosis and catheter failure. A total of 50 cases of central venous catheter fibrin sheath angioplasty (FSA) after catheter removal or exchange are presented. A retrospective review of an outpatient office database identified 70 eligible patients over a 19-month period. After informed consent was obtained, the dialysis catheter exiting the skin was clamped, amputated, and a wire was inserted. The catheter was then removed and a 9-French sheath was inserted into the superior vena cava, a venogram was performed. If a fibrin sheath was present, angioplasty was performed using an 8?×?4 or 10?×?4 balloon along the entire length of the fibrin sheath. A completion venogram was performed to document obliteration of the sheath. During the study, 50 patients were diagnosed with a fibrin sheath, and 43 had no pre-existing central venous stenosis. After FSA, 39 of the 43 patient's (91%) central systems remained patent without the need for subsequent interventions; 3 patients (7%) developed subclavian stenoses requiring repeat angioplasty and stenting; 1 patent (2.3%) developed an occlusion requiring a reintervention. Seven patients with prior central stenosis required multiple angioplasties; five required stenting of their central lesions. Every patient had follow-up fistulograms to document long-term patency. We propose that FSA is a prudent and safe procedure that may help reduce the risk of central venous stenosis from fibrin sheaths due to central venous catheters. PMID:23997555

Hacker, Robert I.; Garcia, Lorena De Marco; Chawla, Ankur; Panetta, Thomas F.

2012-01-01

45

Electrophysiological Characteristics of Canine Superior Vena Cava Sleeve Preparations. Effect of Ranolazine  

PubMed Central

Background In addition to extrasystoles of pulmonary vein (PV) origin, those arising from the superior vena cava (SVC) can precipitate atrial fibrillation (AF). The present study evaluates the electrophysiological properties of canine SVC sleeve preparations and the effect of ranolazine on late phase 3 early and delayed afterdepolarization (EAD and DAD)-induced triggered activity in SVC sleeves, and compares SVC and PV sleeve electrophysiologic properties. Methods and Results Action potentials (APs) were recorded from superfused SVC and PV sleeves using microelectrode techniques. Acetylcholine (1 ?M), isoproterenol (1 ?M), high calcium ([Ca2+]o=5.4 mM), or a combination were used to induce EADs, DADs and triggered activity. A marked diversity of action potential characteristics was observed in the SVC sleeve, including action potentials with short and long APs, with and without phase 4 depolarization. Rapid pacing induced hyperpolarization, accentuating the slope of phase 4 depolarization. Phase 4 depolarization and rapid pacing-induced hyperpolarization were reduced or eliminated following atropine (10 ?M) or ranolazine (10 ?M). APs displaying phase 4 depolarization (n=19) had longer APDs, smaller amplitude and Vmax, and a more positive take-off potential than APs lacking phase 4 depolarization (n=15). Ranolazine (5–10 ?M) eliminated late phase 3 EADs and DAD-induced triggered activity as well as isoproterenol-induced automaticity elicited in SVC sleeves. Compared to PV, SVC sleeves display phase 4 depolarization, smaller Vmax and longer APs. Conclusions Autonomic influences promote spontaneous automaticity and triggered activity in SVC sleeves, thus generating extrasystolic activity capable of initiating atrial arrhythmias. Ranolazine can effectively suppress these triggers. PMID:22407414

Sicouri, Serge; Blazek, Jonathan; Belardinelli, Luiz; Antzelevitch, Charles

2012-01-01

46

Case report: Radiofrequency catheter ablation of typical atrial flutter and the atrioventricular junction via the superior vena caval approach in a patient with a congenital absence of an inferior vena cava.  

PubMed

The absence of an inferior vena cava is a rare congenital condition often without clinical significance. Alternative venous approaches are often needed to treat these patients. We report a case of successful ablation of both isthmus dependent flutter and the AV junction using the superior vena cava in a patient with an inferior vena cava anomaly. PMID:16421696

Pai, Rakesh K; MacGregor, John F; Abedin, Moeen; Hamdan, Mohamed H

2005-12-01

47

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

PubMed Central

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

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

2013-01-01

48

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

PubMed Central

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

2013-01-01

49

Balloon dilatation of complete obstruction of the superior vena cava after Mustard operation for transposition of great arteries.  

PubMed

Balloon dilatation was successfully performed in two patients with complete obstruction of the superior vena cava baffle junction after a Mustard operation for transposition of the great arteries. Evidence for complete relief of obstruction in the first patient, aged 4 years, was obtained by angiography, which showed improved calibre at the site of obstruction and improved haemodynamic pressure measurement after the balloon dilatation. In the second patient, aged 14 years, the relief was incomplete; in this patient a 3 cm long 3 mm diameter Palmaz stent was successfully implanted. PMID:7818969

Abdulhamed, J M; al Yousef, S; Khan, M A; Mullins, C

1994-11-01

50

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

PubMed

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

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

2014-01-01

51

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

PubMed Central

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

2014-01-01

52

IgG4-Related Sclerosing Disease Involving the Superior Vena Cava and the Atrial Septum of the Heart  

PubMed Central

A 55-year-old woman presented with frequent episodes of syncope due to sinus pauses. During ambulatory Holter monitoring, atrial fibrillation and first-degree atrioventricular nodal block were observed. Magnetic resonance imaging and CT scans showed a tumor-like mass from the superior vena cava to the right atrial septum. Open chest cardiac biopsy was performed. The tumor was composed of proliferating IgG4-positive plasma cells and lymphocytes with surrounding sclerosis. The patient was diagnosed with IgG4-related sclerosing disease. Because of frequent sinus pauses and syncope, a permanent pacemaker was implanted. The cardiac mass was inoperable, but it did not progress during the one-year follow-up. PMID:23918583

Song, Changho; Koh, Myoung Ju; Yoon, Yong-Nam; Joung, Boyoung

2013-01-01

53

Catheter ablation of atrioventricular nodal reentrant tachycardia in a patient with complete situs inversus, atrial septal defect and "inverse" persistent left superior vena cava.  

PubMed

We report a case of successful radiofrequency ablation for atypical atrioventricular nodal reentrant tachycardia in a patient with complete situs inversus, secundum atrial septal defect and an "inverse" persistent left superior vena cava. The procedure was performed under the monoplane fluoroscopic guidance using the inferior approach. PMID:17045667

Hirai, Yukoh; Chou, Chung-Chuan; Wen, Ming-Shien

2007-01-31

54

Proton Beam Therapy for a Patient with a Giant Thymic Carcinoid Tumor and Severe Superior Vena Cava Syndrome  

PubMed Central

Surgical resection is the first choice for treatment of a thymic carcinoid tumor and radiotherapy is often performed as adjuvant therapy. Here, we report a case of an unresectable and chemoresistant thymic carcinoid tumor that was treated successfully using standalone proton beam therapy (PBT). The patient was a 66-year-old woman in whom surgical resection of the tumor was impossible because of cardiac invasion. Therefore, chemotherapy was administered. However, the tumor grew to 15 cm in diameter and she developed severe superior vena cava (SVC) syndrome. She was referred to our hospital and received PBT at a dose of 74 GyE in 37 fractions. PBT was conducted without severe early toxicities. After PBT, the tumor mildly shrunk to 13 cm in diameter and SVC syndrome almost disappeared. Subsequently, the tumor has continued to decrease in size slowly over the last 2 years and late toxicities have not been observed. Our experience with this case suggests that PBT may be effective for an unresectable thymic carcinoid tumor. PMID:25002943

Sugawara, Kaori; Mizumoto, Masashi; Numajiri, Haruko; Ohno, Toshiki; Ohnishi, Kayoko; Ishikawa, Hitoshi; Okumura, Toshiyuki; Sakurai, Hideyuki

2014-01-01

55

High prevalence rate of left superior vena cava determined by echocardiography in patients with congenital heart disease in Saudi Arabia  

PubMed Central

Background Persistent left superior vena cava (LSVC) is one of the common anomalies of the systemic veins. Its prevalence is 0.1–0.3% in the general population and is more common with congenital heart disease (CHD). The importance of detecting persistent LSVC prior to cardiac surgery is paramount for systemic veins cannulations. Aim The aim was to evaluate the prevalence of persistent LSVC in patients with CHD in Saudi Arabia. Methods All patients referred to our institution had echocardiography. All complete studies were reviewed for the presence of persistent LSVC. A computerized database was created including the demographic data, CHD diagnoses, and the presence of persistent LSVC. Results A total of 2,042 were examined with an age range of 1 day to 16 years. The complete echocardiographic studies were 1,832 (90%) of whom 738 (40%) patients had CHD. The prevalence of persistent LSVC in patients with CHD was 7.8% (OR 9.26, 95% CI 4.7–18.2, p<0.001). The most common cardiac defect associated with persistent LSVC was complete atrioventricular septal defect (AVSD); all patients with AVSD had Down syndrome. The total number of patients with AVSD was 41, and persistent LSVC was found in 11 (26%) of them (odds ratio 5.1, 95% CI 2.4–10.8, p<0.001). Conclusions The prevalence of persistent LSVC in the current population is almost double the reported prevalence obtained using the same echocardiographic screening tool. PMID:24107708

Eldin, Ghada Shiekh; El-Segaier, Milad; Galal, Mohammed Omer

2013-01-01

56

Intra-atrial rerouting and MAZE procedure for an Adult Patient in Cor Triatriatum, Persistent Left Superior Vena Cava, and Atrial Fibrillation  

Microsoft Academic Search

A combination of cor triatriatum and persistent left superior vena cava without communication to coronary sinus is not common. A 62-year-old male with this diagnosis conjunct with atrial fibrillation underwent successful intra-cardiac repair using a unique method. Following a maze procedure and enlargement the route from pulmonary veins to the mitral valve, a GoreTex conduit was bypassed between the orifice

Koichi Sughimoto; Kozo Matsuo; Masanao Ohba

57

A Rare Combination of the Left Circumflex Coronary Artery Fistula Connecting a Dilated Coronary Sinus with Persistent Left Superior Vena Cava and Multiple Arteriovenous Fistulae  

PubMed Central

Coronary artery fistula (CAF) is an abnormal communication between an epicardial coronary artery and a cardiac chamber, major vessel or other vascular structures. This report presents a rare case of CAF in which a dilated left main trunk and proximal circumflex coronary artery are connected to a dilated coronary sinus. There were also two other fistulae and persistent left superior vena cava. The coronary fistula was managed conservatively. PMID:23755085

Yeon, Myeong Ho; Choi, Young Rak; Lee, Sang Yeub; Bae, Jang Whan; Hwang, Kyung Kuk; Kim, Dong Woon; Cho, Myeong Chan

2013-01-01

58

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

PubMed

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

Dumantepe, Mert; Tarhan, Arif; Ozler, Azmi

2013-06-01

59

Brain abscess associated with isolated left superior vena cava draining into the left atrium in the absence of coronary sinus and atrial septal defect.  

PubMed

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. PMID:16362465

Erol, Ilknur; Cetin, I Ilker; Alehan, Füsun; Varan, Birgül; Ozkan, Süleyman; Agildere, A Muhtesem; Tokel, Kursad

2006-01-01

60

Transcatheter closure of sinus venosus atrial septal defect with anomalous drainage of right upper pulmonary vein into superior vena cava--an innovative technique.  

PubMed

Sinus venosus atrial septal defect (SVASD) is located high in the atrial septum where the right superior vena cava (RSVC) enters the right atrium, and is commonly associated with partial anomalous pulmonary venous return of right upper pulmonary vein (RUPV) into RSVC. Transcatheter closure of such defects has not been described in the literature. We have developed an innovative technique to close this defect by transcatheter means. We present here a 35-year old patient with SVASD and anomalous drainage of RUPV in RSVC in whom we closed the defect along with rerouting of RUPV to left atrium (LA) using a 12 mm × 61 mm adventa V12 covered stent in the RSVC with good outcome. PMID:24753393

Garg, Gaurav; Tyagi, Himanshu; Radha, Anil Sivadasan

2014-09-01

61

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

PubMed

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

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

2014-12-01

62

New transplant technique with hemiazygos continuation and interrupted inferior vena cava.  

PubMed

In the presence of left superior vena cava, cardiac transplantation is performed at the risk of left superior vena cava flow obstruction. In patients with hemiazygos continuation with interrupted inferior vena cava, the patency of left superior vena cava is vital. We introduced a new surgical technique to use a Fontan connection including the native central pulmonary artery as the systemic venous return. The pulmonary artery anastomosis was performed distal to the superior vena cava anastomosis sites. We used this treatment approach successfully to perform cardiac transplantation in two patients who developed severe heart failure after Fontan completion. PMID:24182488

Imamura, Michiaki; Abraham, Boban; Garcia, Xiomara; Knecht, Kenneth R; Frazier, Elizabeth; Shinkawa, Takeshi

2013-11-01

63

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

PubMed

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

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

2014-01-01

64

An unusual constellation of congenital malformations in a single patient including partial anomalous pulmonary venous return, persistent left superior vena cava, aberrant pulmonary fissure, anomalous aortic arch, tracheal diverticulum and annular pancreas.  

PubMed

We report a case of a male patient with a constellation of rare congenital anomalies consisting of: partial anomalous pulmonary venous return (PAPVR), persistent left superior vena cava, 'bovine arch' aortic branching, tracheal diverticulum, aberrant lung fissure anatomy and an annular pancreas. He had presented with a history of worsening dyspnoea. To the best of our knowledge, this is the first reported case of a single patient with such a vast constellation of anomalies. The radiological evaluations, epidemiology, embryology and clinical features of the anomalies are discussed. It is important for radiologists to be aware of each of these anomalies as distinct entities; detection of a single anomaly should alert to the possibility that further anatomic aberrancies may be present. PMID:25362184

Lapa, T; Vedelago, J; Kim, H; Patrick, E

2014-01-01

65

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

Microsoft Academic Search

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

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

66

Ausência parcial de veia cava inferior associada à malformação intestinal  

Microsoft Academic Search

Resumo Criança de 6 anos de idade, sexo feminino, procurou serviço médico devido a mal-formação gastrointestinal. Durante o acompanhamento médico, foi diagnosticada ausência parcial de veia cava inferior, alteração congênita rara que envolve a drenagem vascular do segmento inferior do corpo. Realizados exames de imagem, os quais contribuíram para avaliação e descrição do caso. Mantido tratamento conservador com anticoagulante oral.

Marcello Laneza Felicio; Antonio Sergio Martins; Rubens Ramos de Andrade; Marcos Augusto de Moraes Silva

2007-01-01

67

Vena cava filter insertion and the general surgery armamentarium: a 13-year experience.  

PubMed

The prevention of pulmonary emboli has a long surgical history. Through the development of percutaneous technologies, vena cava filters (VCFs) are now commonly inserted by interventional radiologists. This study reviews our experience with VCFs inserted by general surgeons. We retrospectively reviewed data from our VCF performance improvement database, which is a prospective collection of the VCF experience of the Department of General Surgery from February 1996 to May 2009. Demographics, procedural information, and complications were recorded. Eight hundred fifty-five VCFs were inserted in 853 patients. The mean age was 42.0 years (range, 14 to 90 years). One hundred ninety-seven VCFs were placed in the operating room, and 658 were placed in the intensive care unit. Twelve VCFs were intentionally inserted in a suprarenal position, and four were placed in the superior vena cava. Two patients received both superior vena cava and inferior vena cava filters. Complications included deep vein thrombosis at the insertion site (n=16), vena cava thrombosis (n=9), post-VCF pulmonary embolism (n=2), and a ventricle perforation requiring operative repair (n=1). No deaths were attributed to the presence of a VCF. Overall insertion success was 99.8 per cent. In two patients, an inferior VCF could not be placed as a result of inferior vena cava occlusion with no safe "landing zone" for deployment. The placement of VCFs is a vital skill in the general surgery armamentarium. Our experience demonstrates that general surgeons can safely insert VCFs with minimal perioperative complications. PMID:20698376

Sing, Ronald F; Nguyen, Phuong H; Christmas, A Britton; Jacobs, David G; Heniford, B Todd

2010-07-01

68

[Traumatic thrombosis of the inferior vena cava].  

PubMed

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

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

2004-07-01

69

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

SciTech Connect

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

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

2005-12-15

70

Superior Vena Cava and Innominate Vein Dimensions in Growing Children  

Microsoft Academic Search

Transvenous (TV) pacing and defibrillation leads are frequently implanted in children as part of treatment for various congenital\\u000a and acquired rhythm abnormalities. However, the lead–vascular endothelial interaction is not a benign process and is associated\\u000a with a risk of progressive venous obstruction. Often, this obstruction requires surgical or interventional relief. The risk\\u000a of obstruction is related to venous diameters at

Sanjeev Sanjeev; Peter P. Karpawich

2006-01-01

71

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

SciTech Connect

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

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

2010-06-15

72

Leiomyosarcoma of the inferior vena cava incidentally detected.  

PubMed

This report presents the case of a 78-year-old man affected by retroperitoneal tumor arising from the lower segment of the inferior vena cava. The patient underwent excision of the tumor and resection of the vena cava. Postoperative histopathologic examination revealed the diagnosis of leiomyosarcoma of the inferior vena cava, a rare tumor of mesenchymal origin. PMID:23711977

Lovisetto, Federico; Corradini, Carmen; De Cesare, Fabio; Geraci, Orazio; Manzi, Mario; Emidi, Roberto; Arceci, Francesco

2013-08-01

73

Vena cava air embolism after traumatic Foley catheter placement.  

PubMed

We report a case of traumatic Foley catheter placement and manipulation that resulted in a large, symptomatic, vena cava air embolism confirmed on computed tomography. To the best of our knowledge, our report represents the first case of a large, symptomatic, vena cava air embolism as a direct result of Foley catheter trauma. The included computed tomography images are unique in that they simultaneously show an improperly positioned Foley catheter and a large vena cava air embolism. PMID:19118872

Chavez, Anthony H; Reilly, T Philip; Bird, Erin T

2009-04-01

74

Liver cirrhosis and hepatocellular carcinoma in hepatic vena cava disease, a liver disease caused by obstruction of inferior vena cava  

Microsoft Academic Search

Purpose  Hepatic vena cava disease (HVD), a form of Budd-Chiari syndrome, is caused by the obstruction of hepatic portion of the inferior\\u000a vena cava. It is a chronic disease characterized by the development of liver cirrhosis (LC) and hepatocellular carcinoma (HCC).\\u000a As HVD occurred in areas with high incidence of hepatitis B virus (HBV) infection and some patients tested HBsAg positive,

Santosh Man Shrestha

2009-01-01

75

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

NASA Astrophysics Data System (ADS)

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

Real, Raimundo; Báez, José Carlos

2013-05-01

76

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

PubMed

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

Real, Raimundo; Báez, José Carlos

2013-05-01

77

(Mis)placed central venous catheter in the left superior intercostal vein  

PubMed Central

Background Chest X-ray is routinely performed to check the position of the central venous catheter (CVC) inserted through the internal jugular or subclavian vein, while the further evaluation of CVC malfunction is usually performed by contrast venography. In patients with superior vena cava obstruction, the tip of the catheter is often seen in collateral mediastinal venous pathways, rather than in the superior vena cava. In such cases detailed knowledge of thoracic vessel anatomy is necessary to identify the exact location of the catheter. Case report. We report a case of 32-year-old female patient with relapsing mediastinal lymphoma and previous superior vena cava obstruction with collateral azygos-hemiazygos venous pathways. The patient had CVC inserted through the left subclavian vein and its position was detected by CT to be in the dilated left superior intercostal vein and accessory hemiazygos vein. Considering that dilated accessory hemiazygos vein can tolerate infusion, the CVC was left in place and the patient had no complaints related to CVC (mal)position. Furthermore, we present anatomical and radiological observations on the azygos-hemiazygos venous system with the special emphasis on the left superior intercostal vein. Conclusions Non-contrast CT scans can be a valuable imaging tool in the detection of the CVC position, especially in patients with renal insufficiency and contrast media hypersensitivity. PMID:22933931

Padovan, Ranka Stern; Paar, Maja Hrabak; Aurer, Igor

2011-01-01

78

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

PubMed Central

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

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

2012-01-01

79

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

E-print Network

numerically. Results: Because of a smooth connection with an extracardiac conduit and no major dimension drains blood from the upper body into the primitive atrium during the first weeks of embryonic University, Atlanta, Ga,c and Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia

Pekkan, Kerem

80

A case of absent right and persistent left superior vena cava  

Microsoft Academic Search

BACKGROUND AND PURPOSE:: Our case report deals with the importance of detailed echocardiographic examination for differential diagnosis of coronary sinus dilation and development of abnormalities of great thoracic veins. CASE PRESENTATION:: A 49-year-old man underwent transthoracic echocardiography for atypical chest pain. A dilated coronary sinus was found and venous contrast echocardiography raised the suspicion of absent right and persistent left

Attila Pálinkás; Tamás Forster; Zita Morvai; Endre Nagy; Albert Varga

2006-01-01

81

Results From the TICO-CAVA Land Seismic Refraction Survey  

Microsoft Academic Search

Project TICO-CAVA (Transects to Investigate the Crustal Origin of the Central American Volcanic Arc) is a key part of the MARGINS Subduction Factory initiative to quantify, characterize, and understand the volcanic crust produced in Costa Rica by seismically imaging its volume, extent, seismic properties, and lateral variability. From this information we hope to estimate the major-element composition of the arc

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

2007-01-01

82

Phlorotannins in Ecklonia cava extract inhibit matrix metalloproteinase activity  

Microsoft Academic Search

Matrix metalloproteinase (MMP) inhibitors have been identified as potential therapeutic candidates for metastasis, arthritis, chronic inflammation and wrinkle formation. For the first time here we report a detailed study on the inhibitory effects of phlorotannins in brown algae, Ecklonia cava (EC) on MMP activities in cultured human cell lines. A novel gelatin digestion assay could visualize complete inhibition of bacterial

Moon-Moo Kim; Quang Van Ta; Eresha Mendis; Niranjan Rajapakse; Won-Kyo Jung; Hee-Guk Byun; You-Jin Jeon; Se-Kwon Kim

2006-01-01

83

Biofouling attractants from a brown marine alga Ecklonia cava.  

PubMed

In recent years, industrial pollutants and the mountain forest fire ashes released into seawater cause damage to the marine environment, mainly it reduces the algal productivity in the inter tidal region. To get recover from the stress due to pollutants and to increase the growth and development of biofouling algae (benthic organisms), Ecklonia cava extract was investigated for its biofouling attracting efficiency. Bioactive guided fractions of E. cava extract derived from column chromatography were tested against spore attachment of a fouling alga, Ulva pertusa. Fraction B showed increased spore attachment rate with a maximum of 92 +/- 5%. This fraction was further analysed on HPLC, GC-Mass and NMR, deduced as pentadecanoic acid. PMID:17915745

Sidharthan, M; Viswanadh, G S; Kim, Kyoung Ho; Kim, Hyuk Jun; Shin, H W

2007-04-01

84

“Recovery™” Vena Cava Filter: Experience in 96 Patients  

Microsoft Academic Search

The purpose of the study was to assess the clinical safety and efficacy of the “RecoveryTM” (Bard) inferior vena cava (IVC) filter. We retrospectively evaluated the clinical and imaging data of patients who had a\\u000a “RecoveryTM” IVC filter placed between January 2003 and December 2004 in our institution. The clinical presentation, indications, and\\u000a procedure-related complications during placement and retrieval were

Sanjeeva P. Kalva; Christos A. Athanasoulis; Chieh-Min Fan; Marcio Curvelo; Stuart C. Geller; Alan J. Greenfield; Arthur C. Waltman; Stephan Wicky

2006-01-01

85

Modeling Flow Past a Tilted Vena Cava Filter  

SciTech Connect

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

Singer, M A; Wang, S L

2009-06-29

86

Aortic pseudoaneurysm from aortic penetration with a bird’s nest vena cava filter  

Microsoft Academic Search

This is a case report of a 29-year-old woman with an infected aortic pseudoaneurysm. Two years previously a bird’s nest vena cava filter was placed after complex gastric surgery. Imaging studies and operative findings showed that the pseudoaneurysm was caused by penetration of the aorta by a prong of the vena cava filter.

Joseph J Campbell; David Calcagno

2003-01-01

87

Post-traumatic membranous obstruction of the inferior vena cava associated with a hypercoagulable state  

Microsoft Academic Search

It has been hypothesized that abdominal trauma may be one of the factors involved in membranous obstruction of the inferior vena cava. We present two cases of membranous obstruction of the inferior vena cava associated with trauma. One asymptomatic case, associated with an occult myeloproliferative disorder, developed within 3 years of a violent abdominal trauma. The other case, associated with

Axel Balian; Dominique Valla; Sylvie Naveau; Dominique Musset; Olivier Coué; Guy Lemaigre; Jean Claude Chaput

1998-01-01

88

Advanced Techniques for Removal of Retrievable Inferior Vena Cava Filters  

SciTech Connect

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

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

2012-08-15

89

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

SciTech Connect

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

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

1998-11-15

90

Venous Thromboembolism After Removal of Retrievable Inferior Vena Cava Filters  

SciTech Connect

The purpose of this study was to examine the incidence of new or recurrent venous thromboembolism (VTE) after retrieval of inferior vena cava (IVC) filters and risk factors associated with such recurrence. Between March 2001 and September 2008, at our institution, implanted retrievable vena cava filters were retrieved in 76 patients. The incidence of new or recurrent VTE after retrieval was reviewed and numerous variables were analyzed to assess risk factors for redevelopment of VTE after filter retrieval. In 5 (6.6%) of the 76 patients, redevelopment or worsening of VTE was seen after retrieval of the filter. Three patients (4.0%) had recurrent deep venous thrombosis (DVT) in the lower extremities and 2 (2.6%) had development of pulmonary embolism, resulting in death. Although there was no significant difference in the incidence of new or recurrent VTE related to any risk factor investigated, a tendency for development of VTE after filter retrieval was higher in patients in whom DVT in the lower extremities had been so severe during filter implantation that interventional radiological therapies in addition to traditional anticoagulation therapies were required (40% in patients with recurrent VTE vs. 23% in those without VTE; p = 0.5866 according to Fisher's exact probability test) and in patients in whom DVT remained at the time of filter retrieval (60% in patients with recurrent VTE vs. 37% in those without VTE; p = 0.3637). In conclusion, new or recurrent VTE was rare after retrieval of IVC filters but was most likely to occur in patients who had severe DVT during filter implantation and/or in patients with a DVT that remained at the time of filter retrieval. We must point out that the fatality rate from PE after filter removal was high (2.6%).

Yamagami, Takuji, E-mail: yamagami@koto.kpu-m.ac.jp; Tanaka, Osamu; Yoshimatsu, Rika; Miura, Hiroshi; Nishimura, Tsunehiko [Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Department of Radiology (Japan)

2010-02-15

91

Multidetector row computed tomography and ultrasound characteristics of caudal vena cava duplication in dogs.  

PubMed

Caudal vena cava duplication has been rarely reported in small animals. The purpose of this retrospective study was to describe characteristics of duplicated caudal vena cava in a large group of dogs. Computed tomography (CT) and ultrasound databases from two hospitals were searched for canine reports having the diagnosis "double caudal vena cava." One observer reviewed CT images for 71 dogs and two observers reviewed ultrasound images for 21 dogs. In all CT cases, the duplication comprised two vessels that were bilaterally symmetrical and approximately the same calibre (similar to Type I complete duplication in humans). In all ultrasound cases, the duplicated caudal vena cava appeared as a distinct vessel running on the left side of the abdominal segment of the descending aorta and extending from the left common iliac vein to the left renal vein. The prevalence of caudal vena cava duplication was 0.46% for canine ultrasound studies and 2.08% for canine CT studies performed at these hospitals. Median body weight for affected dogs was significantly lower than that of unaffected dogs (P < 0.0001). Breeds with increased risk for duplicated caudal vena cava were Yorkshire Terrier (odds ratio [OR] = 6.41), Poodle (OR = 7.46), West Highland White Terrier (OR = 6.33), and Maltese (OR = 3.87). Presence of a duplicated caudal vena cava was significantly associated with presence of extrahepatic portosystemic shunt(s) (P < 0.004). While uncommon in dogs, caudal vena cava duplication should be differentiated from other vascular anomalies when planning surgeries and for avoiding misdiagnoses. PMID:24832756

Bertolini, Giovanna; Diana, Alessia; Cipone, Mario; Drigo, Michele; Caldin, Marco

2014-01-01

92

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

PubMed Central

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

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

1995-01-01

93

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

PubMed Central

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

Paddock, Michael; Robson, Nicola

2014-01-01

94

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...

95

Morphofunctional characterization of decellularized vena cava as tissue engineering scaffolds.  

PubMed

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

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

2014-08-01

96

Simple hepatic cyst causing inferior vena cava thrombus  

PubMed Central

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

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

2014-01-01

97

Electrolytic Inferior Vena Cava Model (EIM) of Venous Thrombosis  

PubMed Central

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

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

2011-01-01

98

Evaluation of Retrievability of the Gunther Tulip Vena Cava Filter  

SciTech Connect

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.

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

99

Small-Cell Carcinoma as a Cause of Superior Vena Cava Syndrome in a Patient with Behçet’s Disease  

Microsoft Academic Search

Behçet's disease (BD) is a multisystem disorder characterized by vasculitis. The first description consists of a triad of recurrent ulcers of the oral and genital mucosa with relapsing uveitis. Three forms of vascular disease (venous occlusions, arterial aneurysms and\\/or arteri- al occlusions) are found in BD (1, 2). The coexistence of neoplasia and BD is not common, and there are

Tekin Akpolat; Levent Yildiz; Ilkser Akpolat; Mustafa Bekir Selcuk; Nilgün Ozbek; Idris Yücel

2000-01-01

100

The edible brown seaweed Ecklonia cava reduces hypersensitivity in postoperative and neuropathic pain models in rats.  

PubMed

The current study was designed to investigate whether edible brown seaweed Ecklonia cava extracts exhibits analgesic effects in plantar incision and spared nerve injury (SNI) rats. To evaluate pain-related behavior, we performed the mechanical withdrawal threshold (MWT) and thermal hypersensitivity tests measured by von Frey filaments and a hot/cold plate analgesia meter. Pain-related behavior was also determined through analysis of ultrasonic vocalization. The results of experiments showed MWT values of the group that was treated with E. cava extracts by 300 mg/kg significantly increased; on the contrary, number of ultrasonic distress vocalization of the treated group was reduced at 6 h and 24 h after plantar incision operation (62.8%, p < 0.05). Moreover, E. cava 300 mg/kg treated group increased the paw withdrawal latency in hot-and cold-plate tests in the plantar incision rats. After 15 days of continuous treatment with E. cava extracts at 300 mg/kg, the treated group showed significantly alleviated SNI-induced hypersensitivity response by MWT compared with the control group. In conclusion, these results suggest that E. cava extracts have potential analgesic effects in the case of postoperative pain and neuropathic pain in rats. PMID:24918539

Kim, Jae Goo; Lim, Dong Wook; Cho, Suengmok; Han, Daeseok; Kim, Yun Tai

2014-01-01

101

Bilateral superior oblique palsies.  

PubMed Central

Eighteen consecutive cases of bilateral superior oblique palsy have been studied retrospectively. The patients were typically adults with a history of severe head trauma. All patients complained of diplopia, either vertical, torsional, or both. Other neurological sequelae were common. Central disruption of fusion was seen in three patients. Eight patients underwent surgery for torsional or vertical diplopia, and the results are briefly discussed. PMID:4016044

Lee, J; Flynn, J T

1985-01-01

102

Lake Superior Rift basins  

NASA Astrophysics Data System (ADS)

Sedimentary basins of late Precambrian age have been identified beneath Lake Superior using seismic reflection profiles leased by Argonne National Laboratory, Argonne, Ill., from Grant Norpac, Inc. [McGinnis et al., 1989]. These data, along with 650 km of Great Lakes International Multidisciplinary Program for Crustal Evolution (GLIMPCE) profiles [Behrendt et al., 1988], are being used to develop an understanding of failed rift processes, from initial plate separation, through basin evolution, to final quiescence.

McGinnis, L. D.

103

Evaporation From Lake Superior  

NASA Astrophysics Data System (ADS)

Evaporation is a critical component of the water balance of each of the Laurentian Great Lakes, and understanding the magnitude and physical controls of evaporative water losses are important for several reasons. Recently, low water levels in Lakes Superior and Michigan/Huron have had socioeconomic, ecological, and even meteorological impacts (e.g. water quality and quantity, transportation, invasive species, recreation, etc.). The recent low water levels may be due to increased evaporation, but this is not known as operational evaporation estimates are currently calculated as the residual of water or heat budgets. Perhaps surprisingly, almost nothing is known about evaporation dynamics from Lake Superior and few direct measurements of evaporation have been made from any of the Laurentian Great Lakes. This research is the first to attempt to directly measure evaporation from Lake Superior by deploying eddy covariance instrumentation. Results of evaporation rates, their patterns and controlling mechanisms will be presented. The direct measurements of evaporation are used with concurrent satellite and climate model data to extrapolate evaporation measurements across the entire lake. This knowledge could improve predictions of how climate change may impact the lake's water budget and subsequently how the water in the lake is managed.

Spence, C.; Blanken, P.; Hedstrom, N.; Leshkevich, G.; Fortin, V.; Charpentier, D.; Haywood, H.

2009-05-01

104

Bacterial peritonitis in hepatic inferior vena cava disease: a hypothesis to explain the cause of infection in high protein ascites  

Microsoft Academic Search

Hepatic IVC disease (HVD), a disease caused by complete obstruction or stenosis of inferior vena cava (IVC) near cava–atrial junction is endemic in Nepal. It is a chronic disease characterized by upper abdominal pain, hepatomegaly, splenomegaly and dilated superficial veins in the body trunk. Ascites commonly, with high protein content is a feature of acute and subacute stages and during

Santosh Man Shrestha; Shobhana Shrestha

2002-01-01

105

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

PubMed

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

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

2003-01-01

106

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

PubMed Central

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

Serrano, Fatima; Torres, Rita; Borges, Augusta

2013-01-01

107

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

SciTech Connect

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

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

2009-12-03

108

Ryanodine receptors are uncoupled from contraction in rat vena cava.  

PubMed

Ryanodine receptors (RyR) are Ca(2+)-sensitive ion channels in the sarcoplasmic reticulum (SR) membrane, and are important effectors of SR Ca(2+) release and smooth muscle excitation-contraction coupling. While the relationship between RyR activation and contraction is well characterized in arteries, little is known about the role of RyR in excitation-contraction coupling in veins. We hypothesized that RyR are present and directly coupled to contraction in rat aorta (RA) and vena cava (RVC). RA and RVC expressed mRNA for all 3 RyR subtypes, and immunofluorescence showed RyR protein was present in RA and RVC smooth muscle cells. RA and RVC rings contracted when Ca(2+) was re-introduced after stores depletion with thapsigargin (1?M), indicating both tissues contained intracellular Ca(2+) stores. To assess RyR function, contraction was then measured in RA and RVC exposed to the RyR activator caffeine (20mM). In RA, caffeine caused contraction that was attenuated by the RyR antagonists ryanodine (10?M) and tetracaine (100?M). However, caffeine (20mM) did not contract RVC. We next measured contraction and intracellular Ca(2+) (Ca(2+)(i)) simultaneously in RA and RVC exposed to caffeine. While caffeine increased Ca(2+)(i) and contracted RA, it had no significant effect on Ca(2+)(i) or contraction in RVC. These data suggest that ryanodine receptors, while present in both RA and RVC, are inactive and uncoupled from Ca(2+) release and contraction in RVC. PMID:23177664

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

2013-02-01

109

Adjunctive Inferior Vena Cava Filter Placement for Acute Pulmonary Embolism  

SciTech Connect

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

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

2010-08-15

110

Retrievable Inferior Vena Cava Filters: Factors that Affect Retrieval Success  

SciTech Connect

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

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

2012-10-15

111

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

PubMed Central

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

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

2014-01-01

112

Results From the TICO-CAVA Land Seismic Refraction Survey  

NASA Astrophysics Data System (ADS)

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

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

2007-12-01

113

"Recovery" vena cava filter: experience in 96 patients.  

PubMed

The purpose of the study was to assess the clinical safety and efficacy of the "Recovery(TM)" (Bard) inferior vena cava (IVC) filter. We retrospectively evaluated the clinical and imaging data of patients who had a "Recovery(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. PMID:16565794

Kalva, Sanjeeva P; Athanasoulis, Christos A; Fan, Chieh-Min; Curvelo, Marcio; Geller, Stuart C; Greenfield, Alan J; Waltman, Arthur C; Wicky, Stephan

2006-01-01

114

Retrieval of Cement Embolus from Inferior Vena Cava After Percutaneous Vertebroplasty  

SciTech Connect

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

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

2009-07-15

115

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

E-print Network

to the pattern expected for fragmenting species, the incidence of clonality and asexual propaga- tion Allozymes � Porifera � Asexual reproduction � Genotype Introduction Some demosponges have the abilityNOTE C Zilberberg � M Maldonado � AM Sole´ -Cava Assessment of the relative contribution of asexual

Solé-Cava, Antonio M.

116

Congenital absence of inferior vena cava and thrombosis: a case report  

Microsoft Academic Search

INTRODUCTION: A congenitally absent Inferior Vena Cava (IVC) is a rare anomaly that is recognised to be associated with idiopathic Deep Venous Thrombosis (DVT), particularly in the young. It may not be apparent until later in life. Retrospectively, as discussed in this case, there can be clues indicating the presence of such an anomaly from a young age. However, it

Javaid Iqbal; Eswarappa Nagaraju

2008-01-01

117

Molecular docking studies of a phlorotannin, dieckol isolated from Ecklonia cava with tyrosinase inhibitory activity  

Microsoft Academic Search

In this study, the phlorotannin dieckol, which was isolated from the brown alga Ecklonia cava, was examined for its inhibitory effects on melanin synthesis. Tyrosinase inhibitors are important agents for cosmetic products. We therefore examined the inhibitory effects of dieckol on mushroom tyrosinase and melanin synthesis, and analyzed its binding modes using the crystal structure of Bacillus megaterium tyrosinase (PDB

Sung-Myung Kang; Soo-Jin Heo; Kil-Nam Kim; Seung-Hong Lee; Hae-Mi Yang; Areum-Daseul Kim; You-Jin Jeon

118

Management of retrohepatic inferior vena cava injury during hepatectomy for neoplasms.  

PubMed

The aim of this article is to discuss the management of retrohepatic inferior vena cava injury during hepatectomy for neoplasms. Step-by-step hepatic vascular exclusion, digital compression, finger pinching, and surface-to-surface suturing were used in the management of retrohepatic inferior vena cava injury during hepatic resection in 16 cases: 12 patients underwent exclusion of the hepatic artery and portal vein by portal triad clamping (PTC) only; 3 underwent PTC and exclusion of the infrahepatic inferior vena cava (IVC); and 1 underwent PTC together with exclusion of the suprahepatic and infrahepatic IVC. In all cases, bleeding stopped immediately after the management described, with no intraoperative deaths and no postoperative bleeding. The median follow-up was 42.5 months (range 19-60 months) for all patients, and the 5-year survival rate of all patients with malignant tumors was 28.57%. One died of lung metastasis 19 months after operation, one with spontaneous rupture of a hepatocellular carcinoma 19 months after operation, and eight others from recurrence or metastasis 21, 23, 24, 27, 30, 35, 50, or 54 months after operation, respectively. Two patients had a recurrence 4 years and 4 years 6 months after the initial operation, respectively. The recurrent tumors of the liver were resected. The other patients are currently alive without recurrence or metastasis. The techniques described are safe, simple, practical, time-saving, and effective for controlling massive bleeding arising from injury to the retrohepatic inferior vena cava during hepatic resection. PMID:14648048

Ai-jun, Li; Meng-chao, Wu; Guang-shun, Yang; Han, Chen; Fen, Shen

2004-01-01

119

Exploiting biological activities of brown seaweed Ecklonia cava for potential industrial applications: a review.  

PubMed

Seaweeds are rich in vitamins, minerals, dietary fibres, proteins, polysaccharides and various functional polyphenols. Many researchers have focused on brown algae as a potential source of bioactive materials in the past few decades. Ecklonia cava is a brown seaweed that is abundant in the subtidal regions of Jeju Island in the Republic of Korea. This seaweed attracted extensive interest due to its multiple biological activities. E. cava has been identified as a potential producer of wide spectrum of natural substances such as carotenoids, fucoidans and phlorotannins showing different biological activities in vital industrial applications including pharmaceutical, nutraceutical, cosmeceutical and functional food. This review focuses on biological activities of the brown seaweed E. cava based on latest research results, including antioxidant, anticoagulative, antimicrobial, antihuman immunodeficiency virus, anti-inflammatory, immunomodulatory, antimutagenic, antitumour and anticancer effects. The facts summarized here may provide novel insights into the functions of E. cava and its derivatives and potentially enable their use as functional ingredients in potential industrial applications. PMID:21942760

Wijesinghe, W A J P; Jeon, You-Jin

2012-03-01

120

A rare cause of venous thrombosis: Congenital absence (agenesis) of the inferior vena cava  

PubMed Central

Deep vein thrombosis is a frequent finding in otherwise healthy, young adults who are diagnosed with congenital absence (agenesis) of the inferior vena cava – a rare anomaly. This condition is best diagnosed by computed tomography angiography with venous phase imaging, and is managed using anticoagulation, percutaneous catheter-directed mechanical thrombectomy and thrombolysis. To illustrate this phenomenon, a case is presented. PMID:22477618

Singh, Kuldeep; Poliquin, James; Syversten, Guy; Kohler, Douglas O

2010-01-01

121

Aggressive surgical resection for hepatic metastases involving the inferior vena cava  

Microsoft Academic Search

BACKGROUND: The implications of aggressive surgical approaches for hepatic metastases involving the inferior vena cava (IVC) have not been clarified yet. The aim of this study is to assess the preliminary results of aggressive surgical resection for hepatic metastases involving the IVC.METHODS:Sixteen patients with hepatic metastases involving the IVC underwent surgical resections with the repair and reconstruction of the IVC:

Masaru Miyazaki; Hiroshi Ito; Koji Nakagawa; Satoshi Ambiru; Hiroaki Shimizu; Atsushi Okuno; Yuji Nukui; Hideyuki Yoshitomi; Kimihiko Kusashio; Seiji Furuya; Nobuyuki Nakajima

1999-01-01

122

Venous oxygen measurements in the inferior vena cava in neonates with respiratory failure  

Microsoft Academic Search

BACKGROUND: The present study was undertaken to examine the feasibility of venous oxygen measurements in the inferior vena cava (IVC) via a catheter through the umbilical vein. This may serve as a proxy for mixed venous oxygenation and the complications of right atrial cannulation can be avoided at the same time. It has the added advantage of not being affected

Frans B Plötz; Richard A van Lingen; Albert P Bos

1998-01-01

123

The CAVA Corpus: Synchronised Stereoscopic and Binaural Datasets with Head Movements  

E-print Network

The CAVA Corpus: Synchronised Stereoscopic and Binaural Datasets with Head Movements E. Arnaud1 obtained from a binaural microphone pair, a stereoscopic camera pair and a head tracking device. All Binaural Hearing, Stereo Vision, Database 1. INTRODUCTION Humans' ability to navigate in their environment

Paris-Sud XI, Université de

124

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

SciTech Connect

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

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

2013-04-15

125

Leiomyosarcoma of the inferior vena cava: report of a case and review of the literature.  

PubMed Central

Leiomyosarcoma of the inferior vena cava is a rare and usually fatal disease. Only 45 cases have been reported in the world literature. The authors add one case and review all previous reports. The disease is one primarily of elderly women, arising from the middle third of the inferior vena cava with a wide range of symptomatology, varying form the Budd-Chiari syndrome to a few asymptomatic cases. The tumor may grow very slowly or occasionally very rapidly, shows extensive local invasion, and metastasizes more frequently than previously believed. While radiotherapy and chemotherapy have not been adequately studied, aggresive surgical intervention using the recent advances in vascular surgery appears to offer long term palliation and hopefully cures of this disease in the future. Images Fig. 1. Fig. 2. Fig. 3. PMID:952564

Bailey, R V; Stribling, J; Weitzner, S; Hardy, J D

1976-01-01

126

Voltammetric BioElectronic Tongue for the analysis of phenolic compounds in rosé cava wines  

Microsoft Academic Search

A BioElectronic Tongue (BioET) based on a sensor array comprising 4 voltammetric enzyme-modified (bio)sensors plus pattern recognition and multivariate calibration data processing tools was applied towards the analysis of rosé cava wines. A total of 20 different samples from different producers were analysed using cyclic voltammetry without any sample pretreatment. Obtained responses were preprocessed employing the windowed slicing integral method

X. a Cetó; J. b Capdevila; S. b Mínguez; M.a del Valle

2014-01-01

127

Leiomyosarcoma of the inferior vena cava with renal metastasis: An unusual case and diagnostic challenge  

PubMed Central

Leiomyosarcomas are exceedingly rare malignant tumours with a very poor prognosis. We present a 78-year-old patient with a small renal and paracaval mass. Surgery included right open partial nephrectomy and resection of the paracaval mass to treat the presumed renal cell carcinoma. Pathology revealed the tumour to be leiomyosarcoma (LMS). This is only the second documented report of an inferior vena cava LMS presenting along with an ipsi-lateral renal mass.

Chan, Garson; Kroczak, Tadeusz; Drachenberg, Darrel

2014-01-01

128

Anatomical observations on the renal veins and inferior vena cava at magnetic resonance angiography  

Microsoft Academic Search

Purpose: To describe the renal vein and inferior vena cava (IVC) anatomy found at abdominal magnetic resonance (MR) angiography. Methods: Gadolinium-enhanced, three-dimensional, time-of-flight MR angiograms of 150 patients were evaluated for the number and configuration of the renal veins, and the number, configuration, and dimensions of the IVC. Data were analyzed with the Student's ttest. Results: Retroaortic left renal veins

John A. Kaufman; Arthur C. Waltman; S. Mitchell Rivitz; Stuart C. Geller

1995-01-01

129

Bedside insertion of the inferior vena cava filter in the intensive care unit.  

PubMed

Historically, inferior vena cava (IVC) filters have been inserted in the Radiology Department or the Operating Room. When initially designed, vena cava filters required surgical cut down of the internal jugular vein to insert a large (24 French) introducer and it was therefore necessary to perform this procedure in the operating room. Percutaneous methods (e.g., the Seldinger technique) with smaller profile sheath-dilator devices (6 to 12 French) have made IVC filter insertion a much easier procedure. Furthermore, the remaining equipment is simple, portable, and readily available throughout most hospitals (e.g., C-arm, contrast, sterile drapes, gowns, gloves, catheters, etc.). These factors have made it easy to "bring the procedure to the patient." This is particularly advantageous in critically ill ICU patients. Complication rates of "road trips" for critically ill patients from the ICU to other parts of the hospital (i.e., radiology department or operating room) can result in a mishap rate of 5-30. Secondary benefits of bedside insertion of vena cava filters include cost-effectiveness. PMID:12953822

Sing, Ronald F; Heniford, B Todd

2003-08-01

130

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

PubMed

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

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

2008-03-01

131

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

SciTech Connect

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

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

2013-08-01

132

Medical Technology for Superior Patient  

E-print Network

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

Hayden, Nancy J.

133

Voltammetric BioElectronic Tongue for the analysis of phenolic compounds in rose cava wines  

Microsoft Academic Search

A BioElectronic Tongue (BioET) based on a sensor array comprising 4\\u000a voltammetric enzyme-modified (bio)sensors plus pattern recognition and\\u000a multivariate calibration data processing tools was applied towards the\\u000a analysis of rose cava wines. A total of 20 different samples from\\u000a different producers were analysed using cyclic voltammetry without any\\u000a sample pretreatment. Obtained responses were preprocessed employing the\\u000a windowed slicing integral method

Xavier Ceto; Josefina Capdevila; Santiago Minguez; Manel del Valle

2014-01-01

134

Inferior vena cava thrombosis following endovascular repair of acute aortocaval fistula: a word of caution.  

PubMed

Acute aortocaval fistula (ACF) is a rare, life-threatening condition with a complex clinical presentation, making prompt diagnosis challenging. Primary ACF is believed to be associated with abdominal aortic aneurysm (AAA) rupture in 80% of the cases. Thrombotic complications following endovascular repair for acute ACF are rare and less widely recognized. A high index of suspicion is required for diagnosis of this postoperative complication. We describe a novel, staged management approach using endovascular aortic stent grafts (Gore Excluder; Flagstaff, CA) in both the abdominal aorta and the inferior vena cava (IVC) in a patient with a ruptured AAA and acute ACF with subsequent acute IVC thrombosis. PMID:23709272

Bernstein, Jeffrey; Jimenez, Juan Carlos

2013-08-01

135

Lymphangiomatosis Involving the Inferior Vena Cava, Heart, Pulmonary Artery and Pelvic Cavity  

PubMed Central

A 38-year-old woman who had undergone pelvic lymphangioma resection two months previously presented with cough and dyspnea. Transthoracic echocardiography and CT demonstrated the presence of a mixed cystic/solid component tumor involving the inferior vena cava, heart and pulmonary artery. Complete resection of the cardiac tumor was performed and lymphangioma was confirmed based on histopathologic examination. To the best of our knowledge, this is the first report of lymphangiomatosis with cardiac and pelvic involvement in the published clinical literature. PMID:20046502

Seo, Hye-Sun; Seo, Jon; Kim, Hee Kyung; Her, Keun; Suk, Eun Ha

2010-01-01

136

Recurrent deep venous thrombosis in a patient with agenesis of inferior vena cava  

PubMed Central

Background: Agenesis of the inferior vena cava (IVC) as a cause of recurrent deep vein thrombosis (DVT) is uncommon. Case: A 33-year-old male with no family history of thrombophilia, who had experienced multiple recurrent episodes of DVT over a 15-year period of unknown cause, was admitted into our hospital because of cellulitis in the right leg. Computer tomography with contrast of the abdomen showed an absence of IVC. Conclusion: Congenital absence of the IVC could be a rare risk factor for idiopathic DVT, especially in young individuals. PMID:21760745

Nseir, William; Mahamid, Mahmud; Abu-Rahmeh, Zuhair; Markel, Arieh

2011-01-01

137

Transjugular approach for successful recanalization and stenting for inferior vena cava stenosis.  

PubMed

Budd-Chiari syndrome is a rare disease characterized by obstruction of outflow in the hepatic vein and/or the inferior vena cava (IVC). Percutaneous transluminal angioplasty and stent placement is nowadays considered to be the first-line treatment for central venous disease because of its minimal-invasive approach. IVC reconstruction by surgical approach is not preferred due to increased morbidity and disappointing patency rates. We describe a case of a long-segment, thrombotic, chronic total occlusion of the IVC that was dilated and stented using a recanalization technique involving the use of Brokenborough septal puncture needle, Mullin dilator and Accura balloon from the jugular approach. PMID:23435836

Srinivas, Budanur Chikkaswamy; Singh, Ajit Pal; Nagesh, C M; Reddy, Babu; Manjunath, C Nanjappa

2013-07-01

138

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

PubMed Central

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

Parvinian, Ahmad; Gaba, Ron Charles

2014-01-01

139

Canal Superior Online Pas: Portugal  

E-print Network

:56 LUÍSREBELO: «AS MANIFESTA��EST�M TIDO POUCO OU NENHUM RESULTADO» Numa mini-entrevista ao Canal Superior, com NUMA MARATONA, MAS SEM CORRER? 27/12/201215:27 ONDE VAIS CONTAR AS DOZE BADALADAS? 26/12/201216:23 COOLTURA MAISRECENTES FESTIVALRESCALDO REGRESSAEMFEVEREIRO 2013-01-02 15:07:16 E SE PARTICIPASSES NUMA

Instituto de Sistemas e Robotica

140

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

SciTech Connect

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

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

2010-10-15

141

Abdominal wall phlebitis due to Prevotella bivia following renal transplantation in a patient with an occluded inferior vena cava.  

PubMed

Pre-existing occlusion of the inferior vena cava may complicate renal transplantation. Suppurative abdominal wall phlebitis following renal transplantation was diagnosed in a patient with pre-existing thrombosis of the inferior vena cava of unknown cause. The phlebitis developed in the subcutaneous collateral veins of the abdominal wall contra-laterally to the renal transplant. Cultures from abdominal wall micro-abscesses yielded Prevotella bivia as the causative agent. This complication has not been described before in the context of renal transplantation. The pathogenesis and management of this serious complication are discussed in this paper. PMID:23001520

Janssen, S; van Donselaar-van der Pant, K A M I; van der Weerd, N C; Develter, W; Bemelman, F J; Grobusch, M P; Idu, M M; Ten Berge, I J M

2013-02-01

142

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

NASA Astrophysics Data System (ADS)

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

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

2013-09-01

143

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

PubMed Central

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

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

2014-01-01

144

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

PubMed Central

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

Wu, John; Kolp, Lisa

2014-01-01

145

Leiomyosarcoma of the inferior vena cava: Radical surgery and vascular reconstruction  

PubMed Central

Background Vascular leiomyosarcoma are rare tumors typically originating from the inferior vena cava (IVC). Due to nonspecific clinical signs most tumors are diagnosed at advanced stages. Complete surgical resection remains the only potential curative therapeutic option. Surgical strategy is particularly influenced by the level of the IVC affected. Due to the topographic relation to the renal veins level-II involvement of the IVC raises special surgical challenges with respect to the maintenance of venous outflow. Case presentation We herein report two cases of leiomyosarcoma of the IVC with successful en bloc resection and individualized caval reconstruction. One patient presented with a large intramural and intraluminal mass and received a complete circumferential resection. Reconstruction was performed by graft replacement of the caval segment affected. The other patient displayed a predominantly extraluminal tumor growth and underwent semicircumferential resection of the IVC including the confluence of the left renal vein. In this case vascular reconstruction was performed by cavoplasty and reinsertion of the left renal vein into the proximal portion of the IVC. Resection margins of both patients were tumor free and no clinical signs of venous insufficiency of the lower extremity occurred. Conclusion This paper presents two cases of successfully managed leiomyosarcomas of the vena cava and exemplifies two different options for vascular reconstruction in level II sarcomas and includes a thorough review of the literature. PMID:19558690

Alexander, Andrea; Rehders, Alexander; Raffel, Andreas; Poremba, Christopher; Knoefel, Wolfram T; Eisenberger, Claus F

2009-01-01

146

Blepharoptosis-induced superior keratoconus  

Microsoft Academic Search

PURPOSE: This clinical case report demonstrates blepharoptosis-induced corneal steepening and its subsequent resolution after blepharoptosis surgery.METHODS: A 62-year-old man complaining of blurred vision without apparent cause on clinical examination underwent keratometry and computerized corneal topography, which revealed superior corneal steepening in both eyes. Bilateral upper eyelid blepharoptosis surgery was performed.RESULTS: Three months after blepharoptosis surgery, repeat computerized corneal topography revealed

Terry Kim; Bobbie Khosla-Gupta; Christopher Debacker

2000-01-01

147

Canal Superior Online Pas: Portugal  

E-print Network

Canal Superior Online País: Portugal Period.: Diária �mbito: Online Pag.: 1 de 2ID: 44064719 03:42 ROUPA EM SEGUNDA M�O? O FACEBOOK PODEAJUDAR Para os que passam ao lado das novas tecnologias, há uma novidade que vale a pena espreitar: as trocas e vendas no Facebook. Desde pequenos negócios até pessoas com

Instituto de Sistemas e Robotica

148

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

SciTech Connect

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.

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

149

INTERDEPENDENT SUPERIORITY AND INFERIORITY FEELINGS  

PubMed Central

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

Ingham, Harrington V.

1949-01-01

150

Benefit vs. Risk of a Permanent Inferior Vena Cava Filter in Pulmonary Embolism with Anticoagulation Contraindication  

PubMed Central

ABSTRACT Cases of pulmonary embolism (PE) with contraindication of anticoagulation have low incidence. Under these circumstances the placement of an inferior vena cava (IVC) filter may be life-saving. Paradoxically, the presence of the filter imposes anticoagulation itself, due to the risk of filter thrombosis, promoting stasis and increasing the risk of filter related deep venous thrombosis (DVT) and PE recurrence by means of a substantial collateral venous return that bypasses the IVC filter (1,2). We present the case of a woman with DVT, complicated with high risk PE. After thrombolysis with alteplase the patient develops retroperitoneal hematoma originating from undiagnosed renal angiomyolipoma. Therefore long term anticoagulation is considered contraindicated and an IVC filter is installed. Shortly after hospital release the patient presents occlusion of the IVC filter with DVT recurrence. The initiation of low molecular weight heparin and afterwards of acenocumarol has a favorable outcome, and after six months of follow up the patient is completely recovered. PMID:24790668

CALIN, Ionela-Simona; MAGDA, Lucia-Stefania; CINTEZA, Mircea

2013-01-01

151

Sclerosing epithelioid fibrosarcoma of the liver infiltrating the inferior vena cava.  

PubMed

Sclerosing epithelioid fibrosarcoma (SEF) is a rare and distinct variant of fibrosarcoma, composed of epithelioid tumor cells arranged in strands, nests, cords, or sheets embedded within a sclerotic collagenous matrix. We report a 39-year-old man with SEF of the liver, which infiltrated the inferior vena cava (IVC). The SEF of the liver was successfully resected, and the infiltrated IVC was also removed together with the liver tumor. Histopathological examination of the tumor showed typical histopathology of SEF. Immunohistochemically, the tumor was positive for vimentin. Recurrence was noted 7 mo after surgery. After chemotherapy, the recurrent tumor was resected surgically, and histopathological examination showed similar findings to those of the primary tumor. To our knowledge, this is the first report of SEF of the liver with tumor invasion of the IVC. PMID:19725160

Tomimaru, Yoshito; Nagano, Hiroaki; Marubashi, Shigeru; Kobayashi, Shogo; Eguchi, Hidetoshi; Takeda, Yutaka; Tanemura, Masahiro; Kitagawa, Toru; Umeshita, Koji; Hashimoto, Nobuyuki; Yoshikawa, Hideki; Wakasa, Kenichi; Doki, Yuichiro; Mori, Masaki

2009-09-01

152

Sclerosing epithelioid fibrosarcoma of the liver infiltrating the inferior vena cava  

PubMed Central

Sclerosing epithelioid fibrosarcoma (SEF) is a rare and distinct variant of fibrosarcoma, composed of epithelioid tumor cells arranged in strands, nests, cords, or sheets embedded within a sclerotic collagenous matrix. We report a 39-year-old man with SEF of the liver, which infiltrated the inferior vena cava (IVC). The SEF of the liver was successfully resected, and the infiltrated IVC was also removed together with the liver tumor. Histopathological examination of the tumor showed typical histopathology of SEF. Immunohistochemically, the tumor was positive for vimentin. Recurrence was noted 7 mo after surgery. After chemotherapy, the recurrent tumor was resected surgically, and histopathological examination showed similar findings to those of the primary tumor. To our knowledge, this is the first report of SEF of the liver with tumor invasion of the IVC. PMID:19725160

Tomimaru, Yoshito; Nagano, Hiroaki; Marubashi, Shigeru; Kobayashi, Shogo; Eguchi, Hidetoshi; Takeda, Yutaka; Tanemura, Masahiro; Kitagawa, Toru; Umeshita, Koji; Hashimoto, Nobuyuki; Yoshikawa, Hideki; Wakasa, Kenichi; Doki, Yuichiro; Mori, Masaki

2009-01-01

153

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

PubMed

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

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

2013-12-01

154

Aggressive renal angiomyolipoma with vena cava extension: A case report and literature review  

PubMed Central

Renal angiomyolipoma (AML) is the most common type of benign mesenchymal tumor of the kidney. AMLs typically present as benign lesions without local invasion. However, the tumor may exhibit aggressive behavior. Intravascular extension into the inferior vena cava (IVC) and hemorrhagic aneurysm formation associated with AML has rarely been reported in the past. In the current study, the novel case of a 77-year-old female is described who presented with a tumor thrombus extending to the IVC. The patient subsequently underwent a radical nephrectomy and an IVC tumor thrombectomy. In addition, the available literature regarding this unusual complication of a common renal neoplasm has been reviewed. It is essential for radiologists and clinicians to be aware that AMLs may exhibit these types of aggressive behaviors. PMID:25295081

SHEN, GANG; MAO, QIQI; YANG, HANJIN; WANG, CHAOJUN

2014-01-01

155

Migration of the Günther Tulip inferior vena cava filter to the chest.  

PubMed

The authors describe two cases in which Günther Tulip inferior vena cava filters migrated to the chest, necessitating open-heart surgery for retrieval. In the first case, a 52-year-old man was transferred to their hospital from an outside facility after the filter migrated to the main pulmonary artery during attempted filter placement. In the second case, a 72-year-old man, a Günther Tulip filter was found to have migrated to the tricuspid valve after cardiopulmonary arrest and subsequent resuscitation, including emergent central venous line placement. The authors present the relevant details of both cases, discuss possible preventive strategies, and review the available literature about migration of the Günther Tulip filter. PMID:18057295

Galhotra, Sanjay; Amesur, Nikhil B; Zajko, Albert B; Simmons, Richard L

2007-12-01

156

75 FR 28542 - Superior Resource Advisory Committee  

Federal Register 2010, 2011, 2012, 2013

...the new Superior Resource Advisory Committee members on their roles and responsibilities. DATES: The meeting will be held on Friday...The following business will be conducted: Overview of the roles and responsibilities of the Superior Resource Advisory...

2010-05-21

157

Long-Term Safety and Effectiveness of the 'OptEase' Vena Cava Filter  

SciTech Connect

Purpose: To assess the long-term safety and effectiveness of the OptEase inferior vena cava (IVC) filter. Materials and Methods: In this Institutional Review Board-approved, retrospective study, we reviewed data of 71 patients who received an OptEase filter at our institution from 2002 to 2007. Thirty-nine (55%) patients had symptoms of venous thromboembolism before filter placement. The indications for filter included contraindication to anticoagulation in 31 (44%) patients, prophylaxis against pulmonary embolism (PE) in 29 (41%) patients, and failure of anticoagulation in 11 (15%) patients. Procedure-related complications, such as symptomatic post-filter PE, deep venous thrombosis (DVT), IVC occlusion, and incidental imaging-evident filter-related complications, were recorded. Safety was assessed by the occurrence of filter-related complications during placement and follow-up. Effectiveness was assessed by the occurrence of post-filter PE. Results: Sixty-five (92%) filters were placed under fluoroscopy, and 6 (8%) were placed using intravascular ultrasound guidance. Seventy (99%) filters were placed successfully. Seven (10%) filters were placed in the suprarenal cava. Retrieval was attempted in 14 (20%) patients, and 12 filters were successfully retrieved. Clinical follow-up was available for 20 {+-} 21 months. Symptoms of postfilter PE and DVT occurred in 15% (n = 11) and 10% (n = 7) patients, respectively. None of these patients had computed tomography (CT)-proven PE, and only one had ultrasound-proven new DVT. One patient had symptomatic IVC occlusion. Follow-up abdominal CT in 20 patients showed thrombus in the filter in two of them. There were no instances of filter migration, filter tilt, or caval wall penetration. Conclusion: The OptEase filter appears to have an acceptable long-term safety profile. The filter was effective against PE.

Kalva, Sanjeeva P., E-mail: skalva@partners.org [Massachusetts General Hospital, Department of Radiology (United States); Marentis, Theodore C. [Harvard Medical School Boston, Department of Radiology (United States); Yeddula, Kalpana; Somarouthu, Bhanusupriya; Wicky, Stephan [Massachusetts General Hospital, Department of Radiology (United States); Stecker, Michael S. [Brigham's Women's Hospital, Department of Radiology (United States)

2011-04-15

158

Natural history of untreated inferior vena cava injury and assessment of venous access.  

PubMed

Conventional policy mandates exploration of retroperitoneal hematomas presumed to contain penetrating injuries of the inferior vena cava (IVC). In clinical practice this maneuver frequently results in torrential blood loss, suggesting the injury may be best managed without exploration and IVC suturing. The present study was undertaken to define the natural history of untreated IVC perforations, and to assess venous access with such injuries. Twelve adolescent Hampshire pigs (20-25 kg) underwent halothane anesthesia and laparotomy. The infrarenal IVC was isolated temporarily and a posterior cruciate incision, equivalent to 50% of the IVC circumference, made via anterior venotomy. Animals were resuscitated with Ringer's lactate. Technetium sulfur colloid was injected 20 min postlaparotomy closure via either a jugular or femoral venous cannula, and count activity measured over the IVC injury site using a mobile gamma camera. The procedure was repeated via the counterpart limb. Background from the first injection was subtracted, and count ratios integrated from 16 to 19 min postinjection. Extravasation following lower extremity infusion was not significantly different from that following central venous administration. One pig succumbed to cryptogenic peritonitis one wk postinjury. The remaining animals were killed at periods ranging from 3 to 12 wk. No animal had clinical evidence of delayed bleeding, pulmonary embolus, or other venous sequelae during the observation period. At autopsy all vena cavae were normal caliber without evidence or pseudoaneurysm of thrombosis. This swine study confirms the efficacy of lower extremity venous access with contained IVC injury, and suggests that isolated retroperitoneal IVC injuries may be treated nonoperatively in very selected patients. PMID:3735465

Posner, M C; Moore, E E; Greenholz, S K; Burdick, D C; Clark, D C

1986-08-01

159

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

SciTech Connect

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

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

2008-03-15

160

Living donor liver transplantation for Budd-Chiari syndrome with hepatic inferior vena cava obstruction after open pericardial procedures.  

PubMed

Living donor liver transplantation (LDLT) for Budd-Chiari syndrome (BCS) presents a unique challenge as it does not involve replacement of the hepatic inferior vena cava (IVC). We report a case of successful LDLT in a patient with BCS associated with occlusion of the hepatic veins as well as the IVC. A 34-year-old woman with a history of two open pericardial procedures had decompensated liver failure and portal hypertension. Venography showed complete obstruction of the hepatic IVC and well-developed collateral vessels. We performed LDLT via sternotomy and laparotomy, with an end-to-end anastomosis between the left hepatic vein of the donor and the patient's suprahepatic vena cava in the pericardium. The patient recovered uneventfully and has been doing well for 5 years. LDLT without caval replacement for BCS in a patient with hepatic IVC obstruction is feasible if the patient has good functional collaterals before liver transplantation. PMID:23188387

Fukuda, Akinari; Ogura, Yasuhiro; Kanazawa, Hiroyuki; Mori, Akira; Kawaguchi, Michiya; Takada, Yasutsugu; Uemoto, Shinji

2013-10-01

161

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

PubMed Central

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

Jain, Ankur

2014-01-01

162

Isolated Left-sided Scimitar Vein Connecting All Left Pulmonary Veins to the Right Inferior Vena Cava  

Microsoft Academic Search

When the common pulmonary vein fails to develop, the embryonic connections of the pulmonary veins to one or more of the systemic\\u000a veins almost always persist. Anomalous pulmonary venous connections to the inferior vena cava (IVC) are typically characterized\\u000a by hypoplasia of the involved pulmonary veins and pulmonary artery, as well as abnormal parenchyma of the involved lung. Such\\u000a cases

A. L. Juraszek; H. Cohn; R. Van Praagh; S. Van Praagh

2005-01-01

163

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

SciTech Connect

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.

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

164

Deficiency in thrombin-activatable fibrinolysis inhibitor (TAFI) protected mice from ferric chloride-induced vena cava thrombosis  

Microsoft Academic Search

Thrombin-activatable fibrinolysis inhibitor (TAFI) is a plasma carboxypeptidase that renders a fibrin-containing thrombus\\u000a less sensitive to lysis. Since the role of TAFI in thrombus formation is still controversial in mice, our present study was\\u000a designed to evaluate mice deficient in TAFI (TAFI?\\/?) on FeCl3-induced vena cava and carotid artery thrombosis. Parallel studies were carried out in wild-type mice using a

Xinkang Wang; Patricia L. Smith; Mei-Yin Hsu; Joseph A. Tamasi; Eileen Bird; William A. Schumacher

2007-01-01

165

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.  

PubMed

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. PMID:19115070

Kos, Sebastian; Huegli, Rolf; Hofmann, Eugen; Quick, Harald H; Kuehl, Hilmar; Aker, Stephanie; Kaiser, Gernot M; Borm, Paul J A; Jacob, Augustinus L; Bilecen, Deniz

2009-05-01

166

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

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.

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

167

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

SciTech Connect

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.

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

168

Molecular docking studies of a phlorotannin, dieckol isolated from Ecklonia cava with tyrosinase inhibitory activity.  

PubMed

In this study, the phlorotannin dieckol, which was isolated from the brown alga Ecklonia cava, was examined for its inhibitory effects on melanin synthesis. Tyrosinase inhibitors are important agents for cosmetic products. We therefore examined the inhibitory effects of dieckol on mushroom tyrosinase and melanin synthesis, and analyzed its binding modes using the crystal structure of Bacillus megaterium tyrosinase (PDB ID: 3NM8). Dieckol inhibited mushroom tyrosinase with an IC(50) of 20?M and was more effective as a cellular tyrosinase having melanin reducing activities than the commercial inhibitor, arbutin, in B16F10 melanoma cells, and without apparent cytotoxicity. It was found that dieckol behaved as a non-competitive inhibitor with l-tyrosine substrates. For further insight, we predicted the 3D structure of tyrosinase and used a docking algorithm to simulate binding between tyrosinase and dieckol. These molecular modeling studies were successful (calculated binding energy value: -126.12kcal/mol), and indicated that dieckol interacts with His208, Met215, and Gly46. These results suggest that dieckol has great potential to be further developed as a pharmaceutical or cosmetic agent for use in dermatological disorders associated with melanin. PMID:22112542

Kang, Sung-Myung; Heo, Soo-Jin; Kim, Kil-Nam; Lee, Seung-Hong; Yang, Hae-Mi; Kim, Areum-Daseul; Jeon, You-Jin

2012-01-01

169

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

SciTech Connect

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

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

2008-09-15

170

Fatal pulmonary embolism following spinal surgery in a patient with permanent inferior vena cava filter placement.  

PubMed

It has been proven that the use of an inferior vena cava filter (IVCF) is effective in decreasing the incidence of pulmonary embolism (PE) in high-risk spinal surgery patients. A case of fatal PE after spinal surgery in a 78-year-old woman who had a history of pulmonary hypertension due to peripheral PE treated with a permanent IVCF and anticoagulant therapy for 3 years is reported. The patient had experienced an episode of recurrent PE during the withdrawal of anticoagulants, but she had uneventfully undergone two orthopedic surgeries with a preoperative unfractionated heparin infusion instead of oral warfarin. Three months after the second operation, she underwent posterior lumbar spinal fusion. The following morning, she suddenly complained of chest discomfort and dyspnea with SpO(2) 78 %. An electrocardiogram showed a right bundle branch block. Then, 30 min later, she suddenly lost consciousness, and her carotid pulse was not palpable. The patient died 2 h and 30 min after onset. Acute PE probably occurred because of a massive thrombus above the IVCF. This case suggests that the efficacy of long- term use of a permanent IVCF is limited in cases when anticoagulants must be withdrawn, such as for orthopedic surgery. PMID:24442127

Takai, Noriko; Takasugi, Yoshihiro; Kajikawa, Ryuji; Takase, Toru; Yamamoto, Yoshio; Nakao, Shinichi

2014-08-01

171

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

PubMed

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

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

2014-06-01

172

MitraClip® via direct right atrial access in case of a missing inferior vena cava.  

PubMed

The presence of mitral regurgitation (MR) in patients with heart failure represents an independent predictor of mortality. Until now, the standard therapy for severe MR has been cardiac surgery in order to perform mitral valve replacement or mitral valve repair. With the introduction of the MitraClip® system (Abbott Vascular - Structural Heart, Menlo Park, CA, USA) in 2008, there is now an alternative percutaneous treatment option available for high-risk patients. We report on an 84-year-old male patient who was admitted to the emergency room with increasing shortness of breath due to severe functional MR, at stage NYHA III. In the following days the patient developed cardiogenic shock due to failure of the diuretic medication. The case first described here demonstrates an alternative transseptal route of access via a direct atrial puncture of the RA in a patient with absent inferior vena cava. This approach was successfully used to perform a MitraClip® procedure in this patient with functional MR and cardiogenic shock. It was possible to treat mitral regurgitation and the consecutive cardiogenic shock by implanting two MitraClips®. PMID:23482326

Frerker, Christian; Meincke, Felix; Seibert, Hans-Peter; Alessandrini, Hannes; Kreidel, Felix; Caspary, Michael; Busse, Cord; Schäfer, Ulrich; Kuck, Karl-Heinz

2013-09-01

173

Optimizing the use of inferior vena cava filters in oncology patients: are all filters created equally?  

PubMed

Many studies have supported the efficacy of inferior vena cava filters (IVCF) in the setting of venous thromboembolic disease, particularly in oncologic patients who are at increased risk. The advent of retrievable IVCF designs has prompted dramatically expanded use for patients with widely accepted indications but also disproportionately so in patients with so-called extended indications. At the same time, an alarming increase in filter-related complications has been reported both in the literature and through regulatory agencies, leading to government agency-issued warnings. The synergistic effect of these two interconnected phenomena is explained through a careful review of the evolution of IVCF device design. Critical differences exist when comparing retrievable IVCF and permanent IVCF. IVCF utilization can be optimized by prospectively identifying which patients are best served by a specific IVCF device. Careful follow-up strategies are also needed to ensure that all IVCFs are removed as soon as they are no longer needed. Finally, adjunctive techniques for removing "difficult" filters help maximize the number of IVCF removed and minimize IVCF left implanted needlessly. PMID:24610401

Ryu, Robert K; Lewandowski, Robert J

2014-04-01

174

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

PubMed

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

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

2014-08-01

175

Antiproliferative and antioxidant properties of an enzymatic hydrolysate from brown alga, Ecklonia cava.  

PubMed

The potential antiproliferative and antiradical activities of an enzymatic extract of Ecklonia cava together with its crude polysaccharide (CpoF) and crude polyphenolic fractions (CphF) were evaluated in vitro. Tested extracts showed strong selective cell proliferation inhibition on all cancer cell lines tested, especially CphF extract, containing high polyphenol amount, showed 5.1 microg/ml of IC(50) value on murine colon cancer (CT-26) cell line. According to the nuclear staining experiment, antiproliferative effect of CphF was associated with apoptotic cell demise in CT-26. In addition, The CphF at 5 microg/ml scavenged 70% of DPPH radical, which is much higher than those of BHA and BHT at same concentration. Further more CphF exhibited interesting antiradical properties, expressed by its capacity to scavenge superoxide anion (O(2)(-)), hydrogen peroxide (H(2)O(2)) and hydroxyl radical (OH()). In reducing power assay, CphF extract at 5 microg/ml was found to be as high as that of BHT at same concentration. Also, in total antioxidant assay the effect of CphF at 50 microg/ml was equivalent or slightly higher than those of commercial counterparts at 5 microg/ml concentration. Taken together, the CphF may be a promising alternative to synthetic substances as natural compound with high antiproliferative and antiradical activity. PMID:16516367

Athukorala, Yasantha; Kim, Kil-Nam; Jeon, You-Jin

2006-07-01

176

Nephron Sparing Surgery for Renal Angiomyolipoma with Inferior Vena Cava Thrombus in Tuberous Sclerosis  

PubMed Central

Introduction. Angiomyolipoma is a common benign renal tumor. It is associated with Tuberous Sclerosis Complex (TSC) in 20% of patients. Angiomyolipomas are classically multiple, bilateral, and growing; they may lead to complications such as Wunderlich syndrome or, in rare cases, to venous extension. Observation. a 74-year-old woman with TSC presented with an angiomyolipoma of the right kidney with inferior vena cava (IVC) fatty thrombus. She underwent partial nephrectomy and thrombectomy. After a 7-year follow-up there was no evidence of recurrence or metastasis and her renal function was preserved. Review of Literature. It is the 44th reported angiomyolipoma associated with IVC thrombus. The mean size of angiomyolipomas was 86.1?mm and 67.4% of patients were symptomatic. Pulmonary embolism was found in 6 patients. There were 2 cases of recurrence/metastatic outcome after radical nephrectomy and thrombectomy. They were associated with epithelioid form. The mean size of epithelioid tumors was significantly bigger than in classical angiomyolipomas (127.1?mm versus 82.6?mm, P = 0.037). With a median follow-up of 12 months, 91.3% of patients were recurrence and metastasis free, with 3 cases of nephron sparing surgery. Conclusion. Nephron sparing surgery for angiomyolipoma with IVC fatty thrombus can be safely performed in TSC, even in sporadic angiomyolipoma. PMID:24778892

Riviere, Adrien; Bessede, Thomas; Patard, Jean-Jacques

2014-01-01

177

Mechanisms for precuing superiority in visual recognition  

Microsoft Academic Search

Two experiments (248 female undergraduates) found equal precuing superiority for similar and dissimilar alternatives with abstract geometric stimuli (Wisconsin Card-Sorting Task), and with pictures of common objects, precuing superiority occurred only when each alternative represented the same semantic category. Precuing effects did not appear when different categories were represented in the alternatives, and performance was similar to other conditions in

Dean E. Stolldorf; Gordon M. Redding; Leon M. Manelis

1982-01-01

178

Decision Superiority In a Cyber Driven World !  

E-print Network

2000 4Decision Superiority in Cyberspace * Applications for NAVY UNMANNED AIRCRAFT SYSTEMS BRIEN ALKIRE/25/10 Decision Superiority in Cyberspace * Applications for NAVY UNMANNED AIRCRAFT SYSTEMS BRIEN ALKIRE, JAMES G;9 Today 2010 2015 2020 2025 Arrays 9 Navy ISR Roadmap... Data Challenges Global Hawk Maritime Demo Saber

179

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

NASA Astrophysics Data System (ADS)

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

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

2013-04-01

180

Inferior Vena Cava Oxygen Saturation during the First Three Postnatal Days in Preterm Newborns with and without Patent Ductus Arteriosus  

PubMed Central

Background: Inferior vena cava (IVC) oxygen saturation as an indicator of mixed venous oxygenation may be valuable for understanding postnatal adaptations in newborn infants. It is unknown how this parameter progresses in critically ill premature infants. Aims: To investigate IVC oxygen saturation during the first three days of life in preterm infants with and without patent ductus arteriosus (PDA). Study Design: Case-control study. Methods: Twenty-seven preterm infants were admitted to the Neonatal Intensive Care. Preterm infants with umbilical venous catheterization were included in the study. Six umbilical venous blood gas values were obtained from each infant during the first 72 hours of life. Preterm infants in the study were divided into two groups. Haemodynamically significant PDA was diagnosed by echocardiography in 11 (41%) infants before the 72nd hour of life in the study group and ibuprofen treatment was started, whereas 16 (59%) infants who didn’t have haemodynamically significant PDA were included in the control group. Results: In the entire group, the highest value of mean IVC oxygen saturation was 79.9% at the first measurement and the lowest was 64.8% at the 72nd hour. Inferior vena cava oxygen saturations were significantly different between the study and control groups. Post-hoc analysis revealed that the first and 36th hour measurements made the difference (p=0.01). Conclusion: Inferior vena cava oxygen saturation was found to be significantly different between preterm infants with and without PDA. Further studies are needed to understand the effect of foetal shunts on venous oxygenation during postnatal adaptation in newborn infants. PMID:25337418

Yapakç?, Ece; Ecevit, Ay?e; ?nce, Deniz Anuk; Gökdemir, Mahmut; Tekindal, M. Agah; Gülcan, Hande; Tarcan, Aylin

2014-01-01

181

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

PubMed Central

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

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

2014-01-01

182

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

SciTech Connect

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

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

2004-03-15

183

Medical literature, vena cava filters and evidence of efficacy. A descriptive review.  

PubMed

Up to 15% of all patients with venous thromboembolism (VTE) receive an inferior vena cava filter, and prophylactic placements are increasing. To determine whether current use of filters is based on robust evidence, a global review of the recent (2001-2012) literature on filters was undertaken. The MEDLINE database was searched for articles related to filters appearing during the period 2001-2012, updating a prior search of literature from 1975-2001. All retrieved articles were analysed, classified into predetermined categories and compared to the prior analysis; randomised and large (>100 patients with a filter) comparative non-randomised clinical studies were read in full. The 651 articles, vs 568 in the period 1975-2000, consisted mainly of retrospective series (37.8%), case reports (31.7%), reviews (14.7%, vs 6.7%, p<0.001), animal and/or in vitro studies (7.5%, vs 12.9%, p=0.002), and prospective series or trials (4.9%, vs 7.4%, p=0.07). Of 4 new randomised trials (RCT), none were designed to test the efficacy of the device; to date, only one RCT has attempted to ascertain efficacy, occurring during the period 1975-2000. Eleven large non-randomised studies compared clinical outcomes of patients with and without filters, in VTE patients (n=5) or prophylactic indications (n=6); two studies found statistically significant relationships between filter use and lower mortality rates, though none could demonstrate a causal relationship. Hence, the plethoric literature on filters parallels growing experience with these devices, but still fails to provide reliable evidence that filter use improves relevant clinical outcomes. No indication for filter placement is based on appropriate scientific evidence. PMID:24285013

Girard, Philippe; Meyer, Guy; Parent, Florence; Mismetti, Patrick

2014-04-01

184

Influenza virus neuraminidase inhibitory activity of phlorotannins from the edible brown alga Ecklonia cava.  

PubMed

Influenza A virus infections continue to pose a major threat to humans and several animal species. Neuraminidase (NA) is one of the most promising targets for the development of drugs against influenza viruses because of its critical role in the viral life cycle. During the course of a search for NA inhibitors from edible natural sources, we found that the ethyl acetate layer of ethanol extracts of Ecklonia cava showed extremely high NA-inhibitory activity (72.1% inhibition at 30 ?g/mL). Bioactivity-guided fractionation of the ethyl acetate layer yielded five phlorotannins, identified as phloroglucinol (1), eckol (2), 7-phloroeckol (3), phlorofucofuroeckol (4), and dieckol (5). The inhibitory activities of these compounds (1-5) against NAs from group-1 (A/Bervig_Mission/1/18 [H1N1], A/PR/8/34 [H1N1]) and group-2 (A/Hong Kong/8/68 [H3N2], A/Chicken/Korea/MS96/96 [H9N2]) influenza A were evaluated to determine potencies and kinetic behavior. Analyses using various in vitro influenza A virus NA assays showed that all five phlorotannin derivatives were selective NA inhibitors. Of the phlorotannins, phlorofucofuroeckol (4) exhibited the most potent inhibitory activities toward group-1 NAs (IC?? values, 4.5 and 14.7 ?M), whereas dieckol (5) potently inhibited group-2 NAs. Kinetic analyses indicated that compounds 1-5 were all noncompetitive. Notably, these noncompetitive inhibitors synergized with oseltamivir to enhance the NA-inhibitory effects of oseltamivir. PMID:21585204

Ryu, Young Bae; Jeong, Hyung Jae; Yoon, So Young; Park, Ji-Young; Kim, Young Min; Park, Su-Jin; Rho, Mun-Chual; Kim, Se-Jae; Lee, Woo Song

2011-06-22

185

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

PubMed Central

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

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

2014-01-01

186

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

SciTech Connect

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

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

2013-12-15

187

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

SciTech Connect

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

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

2008-07-15

188

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

PubMed Central

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

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

2014-01-01

189

78 FR 21116 - Superior Supplier Incentive Program  

Federal Register 2010, 2011, 2012, 2013

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

2013-04-09

190

Perturbation Resilience and Superiorization of Iterative Algorithms  

E-print Network

To bridge this gap we have been working on the new concept called ... of the superiorization methodology is to affect the computational treatment of ... when a family of closed and convex sets is present, then projections onto the individual.

2010-04-20

191

Superior semicircular canal dehiscence : auditory mechanisms  

E-print Network

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

Songer, Jocelyn Evelyn

2006-01-01

192

Curso Superior Universitario Neuromarketing y Ventas  

E-print Network

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

Rey Juan Carlos, Universidad

193

Superior sagittal sinus thrombosis. Still a killer.  

PubMed Central

Following treating a case of superior sagittal sinus thrombosis, we did an extensive search of the literature, eliciting 795 cases of the disorder. An analysis showed that even after the introduction of antibiotics, the preponderance of these cases have been diagnosed at autopsy. Our findings raise questions about the current methods of diagnosis and management of superior sagittal sinus thrombosis: Can the correct diagnosis be made earlier? Does a distinction between partial and complete thrombosis call for a different management? Images PMID:3051676

Schell, C L; Rathe, R J

1988-01-01

194

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

PubMed

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

Lee, Jun Ho; Choi, Dong Won

2013-12-01

195

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

SciTech Connect

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.

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

196

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

PubMed Central

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

Lee, Jun Ho; Choi, Dong Won

2013-01-01

197

Anatomy of the Superior Glenoid RimRepair of Superior Labral Anterior to Posterior Tears  

Microsoft Academic Search

Background: Successful placement of a fixation device on the superior glenoid rim during superior labrum repairs requires accurate knowledge of the glenoid rim anatomy.Purpose: To investigate the normal bony anatomy of the superior glenoid rim.Study Design: Descriptive anatomic study.Methods: Twenty cadaveric glenoid specimens were scanned to obtain cross-sectional images with peripheral quantitative computed tomography in three different positions, each perpendicular

Janne T. Lehtinen; Markus J. Tingart; Maria Apreleva; Jonathan B. Ticker; Jon J. P. Warner

2003-01-01

198

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

SciTech Connect

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

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

2013-12-15

199

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

SciTech Connect

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

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

2006-08-15

200

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

SciTech Connect

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

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

2008-03-15

201

Effect of phlorotannins isolated from Ecklonia cava on melanogenesis and their protective effect against photo-oxidative stress induced by UV-B radiation  

Microsoft Academic Search

In the present study, three kinds of phlorotannins, marine algal polyphenol, were isolated from a brown alga Ecklonia cava, and their inhibitory effect on melanogenesis as well as the protective effect against photo-oxidative stress induced by UV-B radiation was investigated. The effect on melanogenesis was evaluated via the inhibitory effects of tyrosinase and melanin synthesis. Among the phlorotannins, dieckol showed

Soo-Jin Heo; Seok-Chun Ko; Seon-Heui Cha; Do-Hyung Kang; Heung-Sik Park; Young-Ung Choi; Daekyung Kim; Won-Kyo Jung; You-Jin Jeon

2009-01-01

202

Communication Competencies as Discriminators of Superiors' Ratings of Employee Performance.  

ERIC Educational Resources Information Center

Focuses on the role of communication competencies in superiors' overall judgments about the performance of subordinates. Finds that superiors' perceptions of subordinates' specific communication competencies are related to the superiors' overall perceptions of subordinate performance. (MS)

Scudder, Joseph N.; Guinan, Patricia J.

1989-01-01

203

Invertebrate macrobenthos of western Lake Superior  

USGS Publications Warehouse

The present report contributes to knowledge of the relative abundance of major groups of benthic invertebrates in western Lake Superior, primarily in the Apostle Islands region. Observations are made on the depth habitation of certain species, and some of the fauna are compared to that in some of the other Great Lakes. Also included is a note on the catch of benthic organisms in a plankton-net tow, and a note on Oligochaeta from Chequamegon Bay and the harbors of Duluth and Superior.

Hiltunen, Jarl K.

1969-01-01

204

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

PubMed Central

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

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

2013-01-01

205

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

PubMed

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

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

2013-01-01

206

Silent racism and intellectual superiority in Peru  

Microsoft Academic Search

Historically, racism as it is understood in South Africa or in parts of the Southern United States has not existed in Peru. The absence or at least the existence to a lesser degree of this type of tension grants us a superiority over our northern neighbours. In Peru, emancipation of slaves was relatively easy. This is not to say that

Marisol De La Cadena

1998-01-01

207

Vo encerrar 16 cursos no superior  

E-print Network

fixados pelo Governo est�o v�rios cursos de Turismo (na Universidade do Algarve, por exem- plo), Design pelos n�meros do Instituto de Emprego e Forma��o Profissio- nal (lEFP). Este impacto � superior nas

Instituto de Sistemas e Robotica

208

Mining Preferences from Superior and Inferior Examples  

E-print Network

Mining Preferences from Superior and Inferior Examples TR 2008-09 Bin Jiang Simon Fraser University bjiang@cs.sfu.ca Jian Pei Simon Fraser University jpei@cs.sfu.ca Xuemin Lin The New South Wales University lxue@cse.unsw.edu.au David W. Cheung The University of Hong Kong dcheung@cs.hku.hk Jiawei Han

Zhang, Richard "Hao"

209

UNIVERSIDADE TECNICA DE LISBOA INSTITUTO SUPERIOR TECNICO  

E-print Network

B UNIVERSIDADE T�ECNICA DE LISBOA INSTITUTO SUPERIOR T�ECNICO VISUAL PERCEPTION FOR MOBILE ROBOTS : FROM PERCEPTS TO BEHAVIOURS JOS�E ALBERTO ROSADO DOS SANTOS VICTOR (Mestre) Tese para obten�c~ao do vision" approaches, thus justifying the title : Visual Perception for Mobile Robots : from Percepts

Instituto de Sistemas e Robotica

210

Avaliação da aprendizagem no ensino superior. \\  

Microsoft Academic Search

*** Resumo: O trabalho apresenta como tema central a avaliação da aprendizagem no ensino superior. Trata-se de uma investigação das pré-concepções dos professores universitários sobre a avaliação e se estas apresentam ou não uma relação mais objetiva com a aprendizagem. Com a hipótese de trabalho de que a nota tende a ser a expressão do comportamento do aluno e não

Luiz Roberto Gomes; Jomar Barros Filho; João Luiz Pegoraro; Dirceu da Silva; Fernanda Oliveira Simon

211

Significant Reading Experiences of Superior English Students.  

ERIC Educational Resources Information Center

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

Whitman, Robert S.

1964-01-01

212

UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITCNICA SUPERIOR  

E-print Network

UNIVERSIDAD AUTONOMA DE MADRID ESCUELA POLITÃ?CNICA SUPERIOR "Digital Coherent Receiver for Optical Oscillator, Sensitivity, Shot noise, Polarization Multiplexing. Abstract: The purpose of this project is to study the basis of optical coherent detection associated with digital signal processing and to design

Autonoma de Madrid, Universidad

213

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

Microsoft Academic Search

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 %

L. Maldonado

2006-01-01

214

Abrahán Enseña astronomía: el prototipo bíblico del estudio del cómputo en las abadías Benedictinas de Cava de' Tirreni y Ripoll.  

NASA Astrophysics Data System (ADS)

In two miscellanies of computus from the abbeys of Cava de' Tirreni (XI century) and Santa María de Ripoll (XII century) an interesting illumination with the patriarch Abraham teaching three Egyptian disciples in secrets of cosmos was represented. The image, not documented in the Vulgata, is derived from a Jewish-Hellenistic tradition that presented Hebrews preceding Egyptians and Greeks in scientific knowledge. The representation of this subject is related to the teaching of astronomy in the Benedictine abbeys to determine the times (horas canonicae) and dates of Easter. But the Isidore's text which accompanies the illumination explains its real meaning: thanks to astrology, that had even practiced by Abraham, magicians were able to determine the birth of Christ. However this event put an end to superstition and was the beginning of Christian time.

Castiñeiras González, M. A.

215

CT-guided percutaneous fine-needle aspiration biopsy of the inferior vena cava wall: a posterior coaxial approach.  

PubMed

A 72-year-old man was referred to our department with an incidentally diagnosed bronchogenic carcinoma of the right upper lobe. Positron emission tomography (PET) combined with computed tomography (PET-CT) revealed an unexpected hot spot in the ventral wall of the infrarenal segment of the inferior vena cava (IVC). Diagnostic biopsy of this lesion was performed under CT guidance with semiautomated 20G fine-needle aspiration (FNA) through a 19G coaxial needle. Cytology revealed few carcinoma cells, which led to the remarkable diagnosis of a distant metastasis to the IVC wall. Both the immediate postinterventional CT control and the further surveillance period of the patient were unremarkable; in particular, no signs of bleeding complications were detected. We conclude that coaxial FNA of an IVC wall lesion is technically feasible and may even help diagnose distant metastasis. PMID:19214626

Kos, Sebastian; Bilecen, Deniz; Baumhoer, Daniel; Guillaume, Nicolas; Jacob, Augustinus L

2010-02-01

216

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

SciTech Connect

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

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

2010-02-15

217

Longevity of Lake Superior lake trout  

USGS Publications Warehouse

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

Schram, Stephen T.; Fabrizio, Mary C.

1998-01-01

218

Superior Temporal Gyrus, Language Function, and Autism  

Microsoft Academic Search

Deficits in language are a core feature of autism. The superior temporal gyrus (STG) is involved in auditory processing, including language, but also has been implicated as a critical structure in social cognition. It was hypothesized that subjects with autism would display different size-function relationships between the STG and intellectual-language-based abilities when compared to controls. Intellectual ability was assessed by

Erin D. Bigler; Sherstin Mortensen; E. Shannon Neeley; Sally Ozonoff; Lori Krasny; Michael Johnson; Jeffrey Lu; Sherri L. Provencal; William McMahon; Janet E. Lainhart

2007-01-01

219

Models of the Superior Olivary Complex  

Microsoft Academic Search

\\u000a Sounds in the real world originate from specific sources, either alone or in combination, so that a natural description of\\u000a a sound includes its location and other spatial properties. The extraction of these spatial properties by the mammalian auditory\\u000a system involves early extraction of interaural difference information in the superior olivary complex (SOC), and the modeling\\u000a of this processing by

T. R. Jennings; H. S. Colburn

220

Lightning activity during the 1999 Superior derecho  

Microsoft Academic Search

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

Colin G. Price; Brian P. Murphy

2002-01-01

221

Laparoscopic Duodenojejunostomy for Superior Mesenteric Artery Syndrome  

PubMed Central

Background: Superior mesenteric artery (SMA) syndrome, also called Wilkie's syndrome, is a rare clinical phenomenon believed to be caused by compression of the third portion of the duodenum by the overlying superior mesenteric artery. We present the case of a 32-year-old female who presented with epigastric pain, weight loss, and vomiting. Methods: Her workup included a normal upper endoscopy as well as an abdominal CT scan and upper GI contrast study that confirmed the diagnosis of superior mesenteric artery syndrome. The patient was taken to the operating room and underwent successful treatment with laparoscopic duodenojejunostomy. Results: The patient achieved complete relief of her symptoms and is able to eat a regular diet without difficulty. SMA syndrome is a real anatomic clinical pathology resulting in chronic, consistent obstructive symptoms. An upper GI series and CT scan with contrast can confirm the diagnosis. Conclusion: Laparoscopic duodenojejunostomy should be considered the treatment of choice for these patients, because it offers a high likelihood of excellent outcome based on the current literature. PMID:19660228

St. Peter, Shawn D.; Hughes, Jenevieve H.; Swain, James M.

2009-01-01

222

Interrupted inferior vena cava and partial anomalous pulmonary venous return with atrial septal defect in a 38-year-old adult: a case report  

PubMed Central

We present a woman having congenital anomalies of the inferior vena cava and partial anomalous pulmonary venous return from the right lung with atrial septal defect in a 38-year-old. Congenital anomalies of inferior vena cava are rare. They are seen more often in young males. If there are not other anomalies, they are latent for a long time. Peripheral venous thrombosis, chronic venous insufficiency, dyspnea and fatigue are often the first symptoms of these anomalies. Surgical repair of atrial septal defect with partial anomalous pulmonary venous return include provision of durably unobstructed systemic and pulmonary venous pathways, closure of the atrial septal defect, and avoidance of arrhythmias. The diagnosis has been determined by compression ultrasonography with color doppler assessment, multidetector computed tomography angiography and echocardiography. PMID:19829946

Rahman, Ali; Kocaturk, Hasan; Bayram, Ednan; Kocakoc, Ercan

2009-01-01

223

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

PubMed

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

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

2013-12-15

224

Pulmonary embolism prophylaxis with inferior vena cava filters in trauma patients: a systematic review using the meta-analysis of observational studies in epidemiology (MOOSE) guidelines  

Microsoft Academic Search

Prophylactic inferior vena cava filters (pIVCFs) for the prevention of pulmonary embolism (PE) are controversial. Current\\u000a practice guidelines (EAST and ACCP) are based on the critical appraisal of observational studies. As a result, their recommendations\\u000a are conflicting and may account for practice pattern variation. The purpose of this study is to critically review the available\\u000a literature and ascertain the level

Anita Rajasekhar; Richard Lottenberg; Lawrence Lottenberg; Huazhi Liu; Darwin Ang

2011-01-01

225

Reconstruction of stenotic or occluded iliofemoral veins and inferior vena cava using intravascular stents: re-establishing access for future cardiac catheterization and cardiac surgery  

Microsoft Academic Search

OBJECTIVESThe study evaluated the safety and efficacy of stent reconstruction of stenotic\\/occluded iliofemoral veins (IFV) and inferior vena cava (IVC).BACKGROUNDPatients with congenital heart defects and stenotic or occluded IFV\\/IVC may encounter femoral venous access problems during future cardiac surgeries or catheterizations.METHODSTwenty-four patients (median age 4.9 years) underwent implantation of 85 stents in 22 IFV and 6 IVC. Fifteen vessels were

Frank F Ing; Thomas E Fagan; Ronald G Grifka; Sandra Clapp; Michael R Nihill; Mark Cocalis; James Perry; James Mathewson; Charles E Mullins

2001-01-01

226

Motor Functions of the Superior Colliculus  

PubMed Central

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

Gandhi, Neeraj J.; Katnani, Husam A.

2013-01-01

227

Inferior vena cava prosthetic replacement in a patient with horseshoe kidney and metastatic testicular tumor: technical considerations and review of the literature  

PubMed Central

Background Seminomatous and non-seminomatous Germ Cell Tumors (GCT) of the testis are a rare cancer, with an estimated incidence of 56.3 per million white males and 10 per million black males in the United States. The association between non-seminomatous GCT and horseshoe kidney is a rare event and is seen in about 1.3% of patients requiring retroperitoneal lymph node dissection. To our knowledge, no cases have been reported in which replacement of the IVC was also necessary. Case presentation We report the case of a 22-year-old man with horseshoe kidney and metastatic non-seminomatous germ cell tumor involving the wall of the inferior vena cava. Following post-chemotherapy retroperitonal lymph node dissection, the inferior vena cava was replaced with an expanded polytetrafluoroethylene graft. At 2-years follow-up, the patient was in good health and the graft was patent. No clinical or diagnostic signs of renal impairment or recurrence of neoplastic disease were noted. Conclusion Radical surgery is warranted in patients with non-seminomatous germ cell tumor metastasizing to the retroperitoneal lymph nodes. When vena cava replacement is required, and the situation is further complicated by horseshoe kidney, as in this case, surgical technique will rely on multidisciplinary surgical treatment planning by a team composed of urologists, vascular surgeons and oncologists. PMID:24885698

2014-01-01

228

45 CFR 73.735-504 - Gifts to official superiors.  

Code of Federal Regulations, 2010 CFR

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

2010-10-01

229

45 CFR 73.735-504 - Gifts to official superiors.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 2011-10-01 false Gifts to official superiors. 73.735-504...GENERAL ADMINISTRATION STANDARDS OF CONDUCT Gifts, Entertainment, and Favors § 73.735-504 Gifts to official superiors. An employee...

2011-10-01

230

45 CFR 73.735-504 - Gifts to official superiors.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 2012-10-01 false Gifts to official superiors. 73.735-504...GENERAL ADMINISTRATION STANDARDS OF CONDUCT Gifts, Entertainment, and Favors § 73.735-504 Gifts to official superiors. An employee...

2012-10-01

231

45 CFR 73.735-504 - Gifts to official superiors.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 2013-10-01 false Gifts to official superiors. 73.735-504...GENERAL ADMINISTRATION STANDARDS OF CONDUCT Gifts, Entertainment, and Favors § 73.735-504 Gifts to official superiors. An employee...

2013-10-01

232

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

233

Contemporary Lake Superior Ice Cover Climatology Raymond A. Assel  

E-print Network

Contemporary Lake Superior Ice Cover Climatology Raymond A. Assel NOAA Great Lakes Environmental Introduction A brief discussion of Lake Superior ice cover climatology (Phillips, 1978) was included cover climatology given additional information and publications since Phillips (1978). The annual cycle

234

Are aromatase inhibitors superior to antiestrogens?  

PubMed

Aromatase inhibitors (AIs) have been in use to treat metastatic breast cancer for over 25 years. Recently potent and specific AIs have been introduced, which, because of their low toxicity profile, are being used in the adjuvant and neoadjuvant situation and also for the prevention of breast cancer. The two non-steroidal AIs, anastrozole and letrozole, and the steroidal AI, exemestane, have all shown superiority to tamoxifen as first-line treatment for advanced breast cancer. Interestingly, the oestrogen receptor downregulator, fulvestrant, was shown to be equivalent to anastrozole when compared as second-line therapy after the failure of tamoxifen. The first adjuvant AI trial began in 1996 and recruited over 9000 patients (ATAC trial). Anastrozole was compared with tamoxifen and a combination of the two drugs. There were no significant differences between tamoxifen and the combination. However, anastrozole showed about a 20% improvement in disease-free survival in ER+ disease compared with the other treatments. An overall survival analysis will be reported later this year. Two trials have compared 5 years of tamoxifen with 2-3 years of tamoxifen, followed by 2-3 years of AI (one trial (ITA) used anastrozole and another (intergroup) exemestane). Both trials show a disease-free advantage for the switch to AI. In another study (MA17) 5 years of tamoxifen was followed by a randomisation to letrozole or placebo and showed a significant disease-free advantage to the AI. Both letrozole and anastrozole show superiority to tamoxifen when used as a neoadjuvant therapy. Anastrozole significantly reduced contralateral breast cancer compared with tamoxifen, and this has led to two prevention trials: one in women at risk comparing anastrozole with placebo and the other after excision of DCIS comparing anastrozole with tamoxifen (IBIS II). The NCI Canada has also just initiated a trial of exemestane for prevention. Nearly all data available indicate that AIs are superior to tamoxifen. The important question is whether survival is improved when they are used as adjuvant therapy? PMID:15860266

Howell, Anthony; Buzdar, Aman

2005-02-01

235

Is the unconscious, if it exists, a superior decision maker?  

PubMed

Newell & Shanks (N&S) show that there is no convincing evidence that processes assumed to be unconscious and superior are indeed unconscious. We take their argument one step further by showing that there is also no convincing evidence that these processes are superior. We review alternative paradigms that may provide more convincing tests of the superiority of (presumed) unconscious processes. PMID:24461083

Huizenga, Hilde M; van Duijvenvoorde, Anna C K; van Ravenzwaaij, Don; Wetzels, Ruud; Jansen, Brenda R J

2014-02-01

236

Status of Lake Superior Benthic Macroinvertebrates, 1994-2003  

Microsoft Academic Search

Recently documented changes to benthic communities in the lower Great Lakes have created concerns about the status of benthic macroinvertebrates in Lake Superior. This lakewide study was conducted to ascertain their status in U.S. nearshore waters of Lake Superior. Benthic macroinvertebrates were collected from 27 sites representing the U.S. nearshore waters (20 to 110 m) of Lake Superior in 1994,

J. Scharold; S. J. Lozano; T. D. Corry

2005-01-01

237

Remote Sensing in Lake Superior Studies  

NASA Technical Reports Server (NTRS)

An investigation was made of surface water transport in the extreme western arm of Lake Superior from July 25 to September 15, 1972. Temperature and water velocity profile measurements were made to determine the nature of currents at the tip of the lake. Bathythermographs and thermistor probes were used for these measurements. From the end of July to August 9, no pronounced steady stratification took place. A series of days with variable winds produced, under N.E. winds, warm water pileup at the tip of the lake, which was subsequently driven out by westerly winds. Some evidence of upwelling was indicated by cold surface waters near the shore. After August 9 considerable stratification with slight upwelling was noted.

Sydor, M.

1973-01-01

238

Lightning activity during the 1999 Superior derecho  

NASA Astrophysics Data System (ADS)

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

Price, Colin G.; Murphy, Brian P.

2002-12-01

239

Lightning Activity During the 1999 Superior Derecho  

NASA Astrophysics Data System (ADS)

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

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

2002-12-01

240

Superior Colliculus and Visual Spatial Attention  

PubMed Central

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

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

2013-01-01

241

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

SciTech Connect

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

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

2009-01-15

242

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

PubMed

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

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

2012-01-01

243

The clinical anatomy of the inferior vena cava: A review of common congenital anomalies and considerations for clinicians.  

PubMed

Anomalies in the course and drainage of the Inferior Vena Cava (IVC) may complicate normal functioning, correct diagnosis, and therapeutic interventions within the abdomen. Development of the IVC occurs during the 4th to 8th week of gestation, and due to its developmental complexity, there are many opportunities for malformations to occur. Although most IVC anomalies are clinically silent and are usually discovered incidentally on abdominal imaging, aberrations may be responsible for formation of thrombosis, back pain, and anomalous circulation of blood to the heart. In this review, we will discuss the most common variations and abnormalities of the IVC, which include the posterior cardinal veins, the subcardinal veins, the supracardinal veins, persistent left IVC, IVC duplication, situs inversus, left retroaortic renal vein, left circumaortic renal collar, scimitar syndrome, and IVC agenesis. For each abnormality outlined above, we aim to discuss relevant embryology and potential clinical significance with regards to presentation, diagnosis, and treatment as is important for radiologists, surgeons, and clinicians in current clinical practice. Clin. Anat. 27:1234-1243, 2014. © 2014 Wiley Periodicals, Inc. PMID:25042045

Spentzouris, Georgios; Zandian, Anthony; Cesmebasi, Alper; Kinsella, Christopher R; Muhleman, Mitchel; Mirzayan, Nadine; Shirak, Michelle; Tubbs, R Shane; Shaffer, Kitt; Loukas, Marios

2014-11-01

244

Superior temporal gyrus spectral abnormalities in schizophrenia  

PubMed Central

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

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

2009-01-01

245

Superior temporal gyrus spectral abnormalities in schizophrenia.  

PubMed

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

Edgar, J Christopher; Hanlon, Faith M; Huang, Ming-Xiong; Weisend, Michael P; Thoma, Robert J; Carpenter, Bruce; Hoechstetter, Karsten; Cañive, José M; Miller, Gregory A

2008-09-01

246

The Superior Transverse Scapular Ligament in Fetuses  

PubMed Central

Introduction. The superior transverse scapular ligament (STSL) links the margins of the suprascapular notch and converts it into a foramen, through which, the suprascapular nerve and, on some rare occasions, the suprascapular vessels pass. This conversion often results from partial or complete ossification of the STSL and may produce compressive symptoms in the suprascapular nerve. Material and Method. Twenty shoulders from human fetuses were dissected without the aid of optical instruments and, using a digital pachymeter of precision 0.01 millimeters, length measurements and thickness measurements were made. The fetal age was from 21 to 33 weeks of gestation, with a mean of 27.6 ± 4.14 weeks. Results. There was no statistically significant difference in STSL length or any difference in the thicknesses at the medial and lateral extremities between the halves of the body (P ? 0.05). However, in the left half of the body, the medial extremity of the STSL was significantly thinner than the lateral extremity (P ? 0.05). Conclusion. Anatomical and morphometric details about the STSL were described in human fetuses. These findings, in fetuses, may encourage the pursuit of further studies to understand the morphofunctional role and meaning of this small ligament. PMID:24455269

Aragao, Jose Aderval; Teles, Luiza Neves de Santana; Chaves, Ana Barbara de Jesus; Prado, Jessica Candida Oliveira; Pereira, Priscila Soares; Dantas, Joao Gabriel Lima; Reis, Francisco Prado

2013-01-01

247

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

PubMed Central

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

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

2009-01-01

248

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

PubMed

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

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

2014-01-01

249

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

PubMed Central

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

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

2014-01-01

250

Superior Mesenteric Artery Syndrome: An Infrequent Complication of Scoliosis Surgery  

PubMed Central

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

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

2014-01-01

251

Crashworthy Seats Would Afford Superior Protection  

NASA Technical Reports Server (NTRS)

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

Gohmert, Dustin

2009-01-01

252

A comparison of mercury cycling in Lakes Michigan and Superior  

Microsoft Academic Search

Mercury cycling in Lake Superior and Lake Michigan was evaluated based on measurements of mercury levels, modeling of evasional fluxes, and development of first-order mass balance models. Total mercury, methylmercury, and dissolved gaseous mercury were measured on sampling cruises in Lake Michigan (2005) and Lake Superior (2006). Average total mercury concentrations in unfiltered surface water were higher in Lake Michigan

Jeffrey D. Jeremiason; Linda A. Kanne; Tara A. Lacoe; Melissa Hulting; Matt F. Simcik

2009-01-01

253

Stress Distribution in the Superior Labrum During Throwing Motion  

Microsoft Academic Search

Background: Superior labrum anterior posterior lesions are common among athletes participating in overhead throwing sports. One described mechanism of injury is application of high local stress via repetitive loading of the long head of the biceps tendon attached to the superior labrum; however, the stress environment within the labrum has not been investigated to date.Hypothesis: Biceps origin locations and throwing

Ming-Long Yeh; David Lintner; Zong-Ping Luo

2005-01-01

254

A comprehensive review of superior mesenteric artery syndrome  

Microsoft Academic Search

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

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

2010-01-01

255

Bioavailable iron in oligotrophic Lake Superior assessed using  

E-print Network

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

Sterner, Robert W.

256

Routes to remembering: the brains behind superior memory  

Microsoft Academic Search

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

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

2002-01-01

257

The Pygmy Whitefish, Coregonus Coulteri, in Lake Superior  

Microsoft Academic Search

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

Paul H. Eschmeyer; Reeve M. Bailey

1955-01-01

258

International WELCOME TO SCUOLA SUPERIORE SANT'ANNA  

E-print Network

'ANNA STUDYING AT THE SCUOLA SUPERIORE SANT'ANNA BEFORE LEAVING HOME AFTER ARRIVAL GUIDELINES FOR LIVING IN PISA College Students. Honors College Students live at the Scuola and study totally free of charge but haveGuide for International Students II Edition #12;CONTENTS WELCOME TO SCUOLA SUPERIORE SANT

Gutkin, Boris

259

77 FR 50079 - Meeting of the Superior Resource Advisory Committee  

Federal Register 2010, 2011, 2012, 2013

...The committee is authorized under the Secure Rural Schools and Community Self-Determination...the link to the Superior RAC page in the Secure Rural Schools section of the Superior...August 27, 2012, under Title II of the Secure Rural Schools Act. The agenda will...

2012-08-20

260

Processing of binaural stimuli by cat superior olivary complex neurons  

Microsoft Academic Search

A method was developed to record stereotactically from the cat Superior Olivary Complex (SOC) using glass micropipettes. Sound stimulation was given through a closed system that permitted independent variation of interaural time (?time) and intensity (?int) differences. The most common binaural units found (n = 34) were ipsilateral excitatory, contralateral inhibitory (EI1), cells of the Lateral Superior Olive (LSO). Some

D. Caird; R. Klinke

1983-01-01

261

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

Federal Register 2010, 2011, 2012, 2013

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

2012-08-15

262

A rare anatomic variant of the superior glenohumeral ligament  

Microsoft Academic Search

The attachment of the superior glenohumeral ligament (SGHL) to the upper pole of the glenoid is variable and 3 types have been described. We report an anatomic variant of SGHL attachment to the upper pole of the glenoid that has not heretofore been reported in the literature. In this case, the SGHL overrode the biceps origin, continued to the superior

Rabindra L. Pradhan; Eiji Itoi; Wataru Watanabe; Shin Yamada; Hiroyuki Nagasawa; Togo Shimizu; Ikuko Wakabayashi; Kozo Sato

2001-01-01

263

Effect of phlorotannins isolated from Ecklonia cava on melanogenesis and their protective effect against photo-oxidative stress induced by UV-B radiation.  

PubMed

In the present study, three kinds of phlorotannins, marine algal polyphenol, were isolated from a brown alga Ecklonia cava, and their inhibitory effect on melanogenesis as well as the protective effect against photo-oxidative stress induced by UV-B radiation was investigated. The effect on melanogenesis was evaluated via the inhibitory effects of tyrosinase and melanin synthesis. Among the phlorotannins, dieckol showed higher effect than that of the other phlorotannins in the both assays; especially the value of dieckol in the tyrosinase inhibition assay was relatively higher than that of a commercial tyrosinase inhibitor (kojic acid). The UV-B protection effect was evaluated via DCFH-DA, MTT, comet assays, and morphological changes in fibroblast. Intracellular ROS induced by UV-B radiation was reduced by the addition of phlorotannins and cell viability was dose-dependently increased. Moreover, dieckol demonstrated strong protective properties against UV-B radiation-induced DNA damage via damaged tail intensity and morphological changes in fibroblast. Hence, these results indicated that dieckol isolated from E. cava has potential whitening effects and prominent protective effects on UV-B radiation-induced cell damages, which might be used in pharmaceutical and cosmeceutical industries. PMID:19490939

Heo, Soo-Jin; Ko, Seok-Chun; Cha, Seon-Heui; Kang, Do-Hyung; Park, Heung-Sik; Choi, Young-Ung; Kim, Daekyung; Jung, Won-Kyo; Jeon, You-Jin

2009-09-01

264

The influence of working memory on the anger superiority effect.  

PubMed

The anger superiority effect shows that an angry face is detected more efficiently than a happy face. However, it is still controversial whether attentional allocation to angry faces is a bottom-up process or not. We investigated whether the anger superiority effect is influenced by top-down control, especially working memory (WM). Participants remembered a colour and then searched for differently coloured facial expressions. Just holding the colour information in WM did not modulate the anger superiority effect. However, when increasing the probabilities of trials in which the colour of a target face matched the colour held in WM, participants were inclined to direct attention to the target face regardless of the facial expression. Moreover, the knowledge of high probability of valid trials eliminated the anger superiority effect. These results suggest that the anger superiority effect is modulated by top-down effects of WM, the probability of events and expectancy about these probabilities. PMID:24564850

Moriya, Jun; Koster, Ernst H W; De Raedt, Rudi

2014-12-01

265

Results from the Texas Pilot Project on Superior Energy Performance  

E-print Network

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

Ferland, K.

266

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...

267

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

268

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

E-print Network

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

Waz, P.

269

First Nations Center at the University of Wisconsin-Superior  

E-print Network

First Nations Center at the University of Wisconsin-Superior Gary Johnson The First Nations Center, formerly the Center for American Indian Studies, at the University of Wisconsin-Superior (UWS) was born out of a desire to increase cultural...-Tribal Council submitted a report to the University of Wisconsin System documenting the educational needs of American Indians. The UWS System responded to this report with the 81 82 Gary Johnson Design for Diversity program aimed at promoting degree...

Johnson, Gary

2003-03-01

270

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

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

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

271

Spatial disparity coding in the superior colliculus of the cat  

Microsoft Academic Search

Cells in the superficial layers of the superior colliculus of the cat have mainly binocular receptive fields. The aim of the\\u000a present experiment was to investigate the sensitivity of these cells to horizontal spatial disparity. Unit recordings were\\u000a carried out in the superficial layers of the superior colliculus of paralyzed and anesthetized cats. Centrally located receptive\\u000a fields were mapped, separated

B. A. Bacon; J. Villemagne; A. Bergeron; F. Lepore; J.-P. Guillemot

1998-01-01

272

Prolonged Mechanical Stretch is Associated with Upregulation of Hypoxia-Inducible Factors and Reduced Contraction in Rat Inferior Vena Cava  

PubMed Central

Background Decreased venous tone and vein wall dilation may contribute to varicose vein formation. We have shown that prolonged vein wall stretch is associated with upregulation of matrix metalloproteases (MMPs) and decreased contraction. Because hypoxia-inducible factors (HIFs) expression also increases with mechanical stretch, this study tested whether upregulation of HIFs is an intermediary mechanism linking prolonged vein wall stretch to the changes in MMP expression and venous contraction. Methods Segments of rat inferior vena cava (IVC) were suspended in tissue bath under 0.5g basal tension for 1hr, and a control contraction to phenylephrine (PHE, 10?5M) and KCl (96 mM) was elicited. The veins were then exposed to prolonged 18hr tension at 0.5g, 2g, 2g+HIF inhibitor (U-0126 10?5M, 17-DMAG 10?5M, or echinomycin 10?6M), or 2g+DMOG 10?4M, a prolyl-hydroxylase inhibitor which stabilizes HIF, and the fold change in PHE and KCl contraction was compared to the control contraction at 0.5g tension for 1hr. Vein tissue homogenates were analyzed for HIF-1?, HIF-2?, MMP-2 and MMP-9 mRNA and protein amount using real-time RT-PCR and Western blots. Results Compared to control IVC contraction at 0.5g tension for 1hr, the PHE and KCl contraction after prolonged 0.5g tension was 2.0±0.35 and 1.1±0.06, respectively. Vein contraction to PHE and KCl after prolonged 2g tension was significantly reduced (0.87±0.13 and 0.72±0.05, respectively). PHE-induced contraction was restored in IVC exposed to prolonged 2g tension plus the HIF inhibitor U0126 (1.38±0.15) or echinomycin (1.99±0.40). U0126 and echinomycin also restored KCl-induced contraction in IVC exposed to prolonged 2g tension (1.14±0.05 and 1.11±0.15, respectively). Treatment with DMOG further reduced PHE- and KCl-induced contraction in veins subjected to prolonged 2g tension (0.47±0.06 and 0.57±0.01, respectively). HIF-1? and HIF-2? mRNA were overexpressed in IVC exposed to prolonged 2g tension, and the overexpression was reversed in by U0126. The overexpression of HIF-1? and HIF-2? in stretched IVC was associated with increased MMP-2 and MMP-9 mRNA. The protein amount of HIF-1?, HIF-2?, MMP-2 and MMP-9 was also increased in IVC exposed to prolonged 2g wall tension Conclusion Prolonged increases in vein wall tension are associated with overexpression of HIF-1? and HIF-2?, increased MMP-2 and MMP-9 expression and reduced venous contraction in rat IVC. Together with our report that MMP-2 and MMP-9 inhibit IVC contraction, the data suggest that increased vein wall tension induces HIF overexpression, and causes an increase in MMPs expression and reduction of venous contraction, leading to progressive venous dilation and varicose vein formation. PMID:21106323

Lim, Chung S.; Qiao, Xiaoying; Reslan, Ossama M.; Xia, Yin; Raffetto, Joseph D.; Paleolog, Ewa; Davies, Alun H.; Khalil, Raouf A.

2010-01-01

273

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

PubMed Central

Background Saponosides (horse chestnut seed extract, escin) and flavonoids (diosmin, Daflon 500) exhibit venotonic properties that have been utilized in treatment of varicose veins. However, the cellular mechanisms underlying the venotonic properties of escin and diosmin are unclear. Because Ca2+ is a major regulator of venous smooth muscle (VSM) function, we tested the hypothesis that escin and diosmin promote Ca2+-dependent venous contraction. Methods Rings of inferior vena cava (IVC) from male rats were suspended in a tissue bath for measurement of isometric contraction. Following control contraction to 96 mM KCl, the effects of escin and diosmin (10?10 to 10?4 M) on vein contraction were measured. To test the role of intracellular Ca2+ release, the vein response to escin and diosmin was measured in Ca2+-free (2mM EGTA) Krebs. To test for Ca2+-dependent effects, IVC segments were pretreated with escin or diosmin (10?4 M) in 0 Ca2+ Krebs, then extracellular CaCl2 (0.1, 0.3, 0.6, 1, 2.5 mM) was added and the [Ca2+]e-contraction relationship was constructed. To test for synergistic effects of diosmin, IVC segments were pretreated with diosmin (10?4 M) then stimulated with KCl (16 to 96 mM) or escin (10?10 to 10?4 M) and vein contraction was measured. Contraction data were presented as mg/mg tissue (means±SEM). Results In IVC segments incubated in normal Krebs (2.5 mM Ca2+), escin caused concentration-dependent contraction (max 104.3±19.6 at 10?4 M). Escin-induced contraction was not a rigor state, because after washing with Krebs the veins returned to a relaxed state. In Ca2+-free Krebs, there was essentially no contraction to escin. In escin-treated veins incubated in 0 Ca2+ Krebs, stepwise addition of extracellular CaCl2 caused corresponding increases in contraction (max 80.0±11.1 at 2.5 mM). In the absence of escin, the ?-adrenergic agonist phenylephrine (PHE, 10?5 M), angiotensin II (AngII, 10?6 M), and membrane depolarization by KCl (96 mM) caused significant contraction (122.5±45.1, 114.2±12.2 and 221.7±35.4, respectively). In IVC segments pretreated with escin (10?4 M), the contractile response to PHE (9.7±2.6), AngII (36.0±9.1) and KCl (82.3±10.2) was significantly reduced. Diosmin (10?4 M) caused small contraction in normal Krebs (11.7±1.9) and Ca2+-free Krebs (4.2±2.2). In diosmin-treated veins incubated in 0 Ca2+ Krebs, addition of extracellular CaCl2 caused minimal contraction. Diosmin did not enhance the IVC contraction to PHE, AngII, or escin, but enhanced the contractile response to KCl (24 to 51 mM). Conclusion In rat IVC, escin induces extracellular Ca2+-dependent contraction, but disrupts ?-adrenergic and AT1R receptor-mediated pathways, and depolarization-induced contraction. The initial venotonic benefits of escin may be offset by disruption of vein response to endogenous venoconstrictors, limiting its long-term therapeutic benefits in varicose veins. Diosmin does not cause venous contraction or potentiate the venotonic effects of endogenous venoconstrictors or escin ex vivo, and its use as venotonic may need to be further evaluated. PMID:21498026

Raffetto, Joseph D.; Khalil, Raouf A.

2011-01-01

274

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

SciTech Connect

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

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

2007-04-15

275

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

PubMed Central

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

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

2014-01-01

276

Effects of Trust in Superiors and Influence of Superiors on the Association Between Individual-Job Congruence and Job Performance\\/Satisfaction  

Microsoft Academic Search

This research examines the moderating influences of trust in superiors and influence of superiors as elements of an organization communication system on the association between individual-job congruence and job performance\\/satisfaction. Data from 302 employees were used to assess the research design variables of growth need strength, job scope, trust in superiors, influence of superiors, job performance, and job satisfaction. Moderated

José R. Goris; Bobby C. Vaught; John D. Pettit

2003-01-01

277

Geology of Superior Ridge uranium deposits, Ventura County, California  

SciTech Connect

Epigenetic uranium deposits with potential commercial value have been found in the lower part of the upper Eocene to lower Miocene Sespe Formation near Ojai, in Ventura County, California. This report describes the geological and geochemical setting of these deposits and postulates a model for their origin. Several uranium deposits are located on Superior Ridge, a topographic high about 3 miles long located just south of White Ledge Peak and 6 to 9 miles west of Ojai (Photo 1). A single uranium deposit on Laguna Ridge is located about 3 miles south of Superior Ridge, and was included with the Superior Ridge deposits in the White Ledge Peak district. A few small deposits are known to exist in other parts of Ventura County. A preliminary model for uranium mineralization in the Sespe Formation postulated that the organic material necessary for concentrating the uranium by chemical reduction or precipitation originated as terrestrial humic acid or humate.

Dickinson, K.A.; Leventhal, J.S.

1988-03-01

278

Temporal Bone Fracture Causing Superior Semicircular Canal Dehiscence  

PubMed Central

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

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

2014-01-01

279

Neurocognitive Decrements are Present in Intellectually Superior Schizophrenia  

PubMed Central

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

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

2014-01-01

280

Noncompaction of the ventricular myocardium in a patient with Beh?et's disease showing multiple thrombus formations in the right atrium, inferior vena cava and right iliac vein: A case report  

PubMed Central

A case of noncompaction of the ventricular myocardium in a 24-year-old man with Behçet’s disease is reported. Transthoracic echocardiographic examination revealed two cardiac masses in the right atrium, pericardial fluid behind the right atrium and multiple muscular trabeculation in the apical part of the left ventricle. Subsequent transesophageal echocardiography clearly showed two thrombus formations in the right atrium and prominent ventricular trabeculations with deep intertrabecular recesses perfused from the ventricular cavity, which are characteristic findings of ventricular noncompaction. In addition, abdominopelvic computed tomography showed thrombus formation in the inferior vena cava and right iliac vein. These multiple thrombus formations were treated successfully with steroid, immunosuppressive and anticoagulant therapies. This is the first reported case of left ventricular noncompaction in association with Behçet’s disease showing pericarditis and multiple thrombus formations in the right atrium, inferior vena cava and right iliac vein. PMID:22477276

Kasifoglu, Timucin; Cavusoglu, Yuksel; Korkmaz, Cengiz; Birdane, Alparslan

2007-01-01

281

LAND USE ACTIVITIES AND WESTERN LAKE SUPERIOR WATER QUALITY  

EPA Science Inventory

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

282

Area contingency plan western lake Superior Coastal zone. (COTP Duluth)  

SciTech Connect

The Area Contingency Plan, mandated under the Oil Pollution Act, was developed by the Western Lake Superior Area Committee, which is chaired by the Coast Guard and consists of local, state, federal, and private members. The plan prepares in advance for an oil or hazardous substance spill in the COTP Duluth Coastal Zone.

NONE

1995-02-15

283

ORGANIC CARBON - A NONSPECIFIC WATER QUALITY INDICATOR FOR LAKE SUPERIOR  

EPA Science Inventory

Organic matter is ubiquitous in surface waters and its presence is generally recognized as being detrimental to water quality. This paper is the first part of a study of the distribution of organic carbon in Lake Superior Basin waters. Temporal and spatial distribution of organic...

284

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...

285

Morphological Variation of Siscowet Lake Trout in Lake Superior  

Microsoft Academic Search

Historically, Lake Superior has contained many morphologically distinct forms of the lake trout Salvelinus namaycush that have occupied specific depths and locations and spawned at specific times of the year. Today, as was probably the case historically, the siscowet morphotype is the most abundant. Recent interest in harvesting siscowets to extract oil containing omega-3 fatty acids will require additional knowledge

Charles R. Bronte; Seth A. Moore

2007-01-01

286

Biological Motion Task Performance Predicts Superior Temporal Sulcus Activity  

ERIC Educational Resources Information Center

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

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

2011-01-01

287

Court File No. 70075/10 SUPERIOR COURT OF JUSTICE  

E-print Network

- 1 - Court File No. 70075/10 ONTARIO SUPERIOR COURT OF JUSTICE B E T W E E N HERBERT GOLDIE the Supreme Judicial Court of Ma of the U.S. Federal Election Commission. At that hearing, I recommended changes to the draft voting system

Jones, Douglas W.

288

Ileocolic Arteriovenous Fistula with Superior Mesenteric Vein Aneurism: Endovascular Treatment  

Microsoft Academic Search

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

Miguel Angel De Gregorio; Maria José Gimeno; Joaquin Medrano; Caudio Schönholz; Juan Rodriguez; Horacio D’Agostino

2004-01-01

289

Word and pseudoword superiority effects reflected in the ERP waveform  

PubMed Central

A variant of the Reicher-Wheeler task was used to determine when in the event-related potential (ERP) waveform indices of word and pseudoword superiority effects might be present, and whether ERP measures of superiority effects correlated with standardized behavioral measures of orthographic fluency and single word reading. ERPs were recorded to briefly presented, masked letter strings that included real words (DARK/PARK), pseudowords (DARL/PARL), nonwords (RDKA/RPKA), and letter-in-xs (DXXX, PXXX) stimuli. Participants decided which of two letters occurred at a given position in the string (here, forced-choice alternatives D and P). Behaviorally, both word (more accurate choices for letters in words than in baseline nonwords or letter-in-xs) and pseudoword (more accurate choices for letters in pseudowords than in baseline conditions) superiority effects were observed. Electrophysiologically, effects of orthographic regularity and familiarity were apparent as early as the P150 time window (100–160 ms), an effect of lexicality was observed as early as the N200 time window (160–200 ms), and peak amplitude of the N300 and N400 also differentiated word and pseudoword as compared to baseline stimuli. Further, the size of the P150 and N400 ERP word superiority effects was related to standardized behavioral measures of fluency and reading. Results suggest that orthographic fluency is reflected in both lower-level, sublexical, perceptual processing and higher-level, lexical processing in fluently reading adults. PMID:20211607

Coch, Donna; Mitra, Priya

2010-01-01

290

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

ERIC Educational Resources Information Center

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…

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

2004-01-01

291

Do high functioning persons with autism present superior spatial abilities?  

Microsoft Academic Search

This series of experiments was aimed at assessing spatial abilities in high functioning individuals with autism (HFA), using a human-size labyrinth. In the context of recent findings that the performance of individuals with HFA was superior to typically developing individuals in several non-social cognitive operations, it was expected that the HFA group would outperform a typically developing comparison group matched

M.-J. Caron; L. Mottron; C. Rainville; S. Chouinard

2004-01-01

292

Ileocolic Arteriovenous Fistula with Superior Mesenteric Vein Aneurism: Endovascular Treatment  

SciTech Connect

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

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

2004-09-15

293

HABITAT: LAKE SUPERIOR - STATE OF THE LAKE 2005  

EPA Science Inventory

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

294

ZOOBENTHOS ASSEMBLAGES AS INDICATORS OF LAKE SUPERIOR COASTAL WETLAND CONDITIONS  

EPA Science Inventory

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

295

Denitrification Rates in a Lake Superior Coastal Wetland  

EPA Science Inventory

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

296

Controlled Movement Processing: Superior Colliculus Activity Associated with Countermanded Saccades  

Microsoft Academic Search

We investigated whether the monkey superior colliculus (SC), an important midbrain structure for the regulation of saccadic eye movements, contains neurons with activity patterns sufficient to control both the cancellation and the production of saccades. We used a countermanding task to manipulate the probability that, after the presentation of a stop signal, the monkeys canceled a saccade that was planned

Martin Pare; Doug P. Hanes

2003-01-01

297

Status of Lake Superior Benthic Macroinvertebrates, 1994-2003  

NASA Astrophysics Data System (ADS)

Recently documented changes to benthic communities in the lower Great Lakes have created concerns about the status of benthic macroinvertebrates in Lake Superior. This lakewide study was conducted to ascertain their status in U.S. nearshore waters of Lake Superior. Benthic macroinvertebrates were collected from 27 sites representing the U.S. nearshore waters (20 to 110 m) of Lake Superior in 1994, 2000, and 2003. No significant differences in total benthic macroinvertebrate abundance, or abundances of oligochaetes, clams or chironomids were detected between years. Abundance of the amphipod Diporeia spp. was lower in 2000 than in 1994 and 2003. The oligochaete trophic index, a measure of relative abundance of species tolerant of varying degrees of organic enrichment, did not differ between years. Diporeia exhibited a bimodal depth distribution, with peaks in abundance at depths of 30 to 40 and 60 to 70 m. Oligochaetes were most abundant at 50 to 60 m depth, clams between 30 and 70 m, and chironomids at less than 30 m, with a secondary peak at 50 to 60 m. The spatial and temporal variability observed in Lake Superior benthic macroinvertebrate communities has implications for sampling design for environmental assessment. This abstract does not necessarily reflect USEPA policy.

Scharold, J.; Lozano, S. J.; Corry, T. D.

2005-05-01

298

Superior electrochemical platforms based on polymer carbon nanotube composite electrodes  

Microsoft Academic Search

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

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

2010-01-01

299

Exchange Between Superiors and Subordinates in Large Organizations  

ERIC Educational Resources Information Center

Social exchange theory is used to formulate hypotheses about superior-subordinate relations in large complex organizations. Data from self-administered questionnaires are used to support the hypotheses derived from the theoretical model and suggest the utility of further research using social exchange theory. (Author)

Marcus, Philip M.; House, James S.

1973-01-01

300

Inhibition in Superior Colliculus Neurons in a Brightness Discrimination Task?  

Microsoft Academic Search

Simultaneous recordings were collected from between two and four buildup neurons from the left and right superior colliculi in rhesus monkeys in a simple two-choice brightness discrimination task. The monkeys were required to move their eyes to one of two response targets to indicate their decision. Neurons were identified whose receptive fields were centered on the response targets. The functional

Roger Ratcliff; Yukako T. Hasegawa; Ryohei P. Hasegawa; Russ Childers; Philip L. Smith; Mark A. Segraves

2011-01-01

301

Lake Superior Seismic Experiment: Shots and Travel Times.  

National Technical Information Service (NTIS)

An extensive and detailed study of the crust and upper mantle in the Lake Superior region was undertaken as part of the International Upper Mantle Project. The shot and station locations and the first-arrival travel times of the 13 participating instituti...

J. S. Steinhart

1964-01-01

302

Trans-Superior Meatal Approach to the Sphenoid Sinus  

Microsoft Academic Search

We have recently operated on patients with isolated lesions of the sphenoid sinus using the trans-superior meatal approach that we developed. This may be one of the least traumatic methods for treating the isolated lesions of the sphenoid sinus. Though it has a few limitations, this approach provides a direct and safe short-cut to the sphenoid sinus and is well

Yang-Gi Min; Jin-Sung Shin; Chul Hee Lee

1995-01-01

303

Author's personal copy Producing superior composites by winding carbon nanotubes  

E-print Network

Author's personal copy Producing superior composites by winding carbon nanotubes onto a mandrel for processing high-performance carbon nanotube (CNT)/poly(vinyl alco- hol) (PVA) composites by coupling University, Raleigh, NC 27695, USA c Suzhou Institute of Nano-Tech and Nano-Bionics, Suzhou 215123, China d

Zhu, Yuntian T.

304

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...

305

Superior orders: when and how to dissent in the military  

E-print Network

profession in which loyalty and obedience are valued so highly, there is often a reluctance to discuss the problem of superior orders. The problem is discussed from the perspective of the junior officer. Immanuel Kant's ethics are used as the basis...

Hildahl, Jessica Lynn

2012-06-07

306

SCUOLA NORMALE SUPERIORE Preprints di Matematica -n. 1 Gennaio 2005  

E-print Network

for Infinite Dimensional Diffusion Equations ROBERTO STASI #12;Maximum Principles for Infinite Dimensional Diffusion Equations Roberto Stasi Scuola Normale Superiore Piazza dei Cavalieri, 7 56126 Pisa e-mail: roberto.stasi@sns.it Abstract In this paper we prove the validity of the Maximum Principle for some class

Abbondandolo, Alberto

307

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

308

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...

309

Leica ASP300 S Superior Specimen Quality, Every Time!  

E-print Network

. Ongoing research and development work with enhanced processes and system components now reflectsLeica ASP300 S Superior Specimen Quality, Every Time! The New Automated Vacuum Tissue Processor #12;2 The new Leica ASP300 S, designed for routine clinical and research histopathology, is an inno- vative

Adams, Mark

310

Such ion gels have shown superior performance as gate  

E-print Network

Such ion gels have shown superior performance as gate dielectrics in organic thin-film transistors (5). For many organic semiconductors, device perfor- mance is constrained by the num- ber of charge electric field leads to differential gel swelling and thus to bending. A possible route to accentu- ate

Zeebe, Richard E.

311

[Examination of the hypothesis 'the factors and mechanisms of superiority'].  

PubMed

INTRODUCTION. The hypothesis of Geschwind and Galaburda suggests that specific cognitive superiority arises as a result of an alteration in development of the nervous system. In this article we review the co existence of superiority and inferiority . PATIENTS AND METHODS. A study was made of six children aged between 6 and 8 years old at the Instituto de Belles Artes Antonio Maria Valencia in Cali,Columbia with an educational level between second and third grade at a primary school and of medium low socio economic status. The children were considered to have superior musical ability by music experts, which is the way in which the concept of superiority was to be tested. The concept of inferiority was tested by neuropsychological tests = 1.5 DE below normal for the same age. We estimated the perinatal neurological risk in each case. Subsequently the children s general intelligence and specific cognitive abilities were evaluated. In the first case the WISC R and MSCA were used. The neuropsychological profiles were obtained by broad evaluation using a verbal fluency test, a test using counters, Boston vocabulary test, the Wechster memory scale, sequential verbal memory test, super imposed figures test, Piaget Head battery, Rey Osterrieth complex figure and the Wisconsin card classification test. The RESULTS showed slight/moderate deficits in practical construction ability and mild defects of memory and concept abilities. In general the results supported the hypothesis tested. The mechanisms of superiority proposed in the classical hypothesis mainly involve the contralateral hemisphere: in this study the ipsilateral mechanism was more important. PMID:12080513

Sierra-Fitzgerald, O; Quevedo-Caicedo, J; López-Calderón, M G

312

Improving historical precipitation estimates over the Lake Superior basin  

NASA Astrophysics Data System (ADS)

Lake Superior, the northern-most of the Laurentian Great Lakes, is the largest (by surface area) freshwater lake on the planet. Due in part to its high water surface to land area ratio, over one-third of the Lake Superior basin water budget is derived from precipitation falling directly on the lake surface. For most of the Great Lakes (including Lake Superior), historical precipitation estimates extend back to the early 1880s, and are based primarily on land-based gauge measurements. While alternatives to gauge-based estimates have been explored, there is no clear history of applying regional climate models (RCMs) to improve historical over-lake precipitation estimates. To address this gap in regional research, and to advance the state-of-the-art in Great Lakes regional hydrological modeling, we compare 21 years of output (1980-2000) from an RCM to conventional gauge-based precipitation estimates for the same time period over the Lake Superior basin. We find that the RCM, unlike the gauge-based method, simulates realistic variations in over-lake atmospheric stability, which propagate into basin-wide precipitation estimates with a relatively low over-lake to over-land precipitation ratio in warm months (roughly 0.7 to 0.8 in June, July, and August) and a relatively high over-lake to over-land precipitation ratio in cold months (roughly 1.3 to 1.4 in December and January), compared to gauge-based estimates. Our findings underscore a need to potentially update historical gauge-based precipitation estimates for large lake systems, including Lake Superior, and that RCMs appear to provide a robust and defensible basis for making those updates.

Holman, K. D.; Gronewold, A.; Notaro, M.; Zarrin, A.

2012-02-01

313

Deep geoelectric investigation in the western Superior Province, Canada  

NASA Astrophysics Data System (ADS)

Magnetotelluric (MT) soundings carried out at 230 sites between 1997 and 2001 characterize the electrical structure of 500,000 km^2 of the Archean Superior Province, the nucleus of the North American continent. The western part of the Superior Province contains a regional pattern of alternating 100-200 km wide granite-greenstone and metasedimentary belts and the observed geological relationships of these belts or subprovinces has been used to suggest that the Archean continental growth consisted of successive accretion of oceanic crust, island arcs, sedimentary prisms, and continental fragments. The objectives of the MT study include determining the three-dimensional form of the boundaries between subprovinces and the conductivity structure of the sub-crustal lithosphere. The MT responses define a number of large-scale structures in the western Superior Province. The geoelectric dimensionality was examined using tensor skew and goodness-of-fit of 2D decomposition models, and the geoelectric strike was examined using tensor decomposition and induction vectors. Lithosphere in the southern region of the study area is dominated by east-west strikes and approximately two-dimensional structure but there are areas of 3D responses. Apparent resistivity and phase results show that the Mesoarchean core of the western Superior Province, the North Caribou terrane, is characterized by an extremely resistive crust underlain by a conductive upper mantle. Beneath the northwestern Superior Province the long period electrical strike direction rotate to align with major zones of mantle penetrating shear zones. The close correspondence between the strikes of upper mantle electrical structure and geological units indicates the absence of a significant modification of the deeper lithopshere since circa 2.7 Ga.

Craven, J. A.; Wu, X.; Ferguson, I. J.

2003-04-01

314

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

SciTech Connect

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

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

2011-08-01

315

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

SciTech Connect

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

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

2011-10-01

316

Charting the lower superior temporal region, a new motion-sensitive region in monkey superior temporal sulcus.  

PubMed

Although the role of the middle temporal (MT/V5) area and its medial superior temporal (MST) satellites in motion processing has been well explored, relatively little is known about motion regions located more rostrally in the superior temporal sulcus (STS), such as the fundus of the superior temporal (FST) area, the superior temporal polysensory (STP) region, or beyond. To fill this void, we used contrast-enhanced functional magnetic resonance imaging in awake macaques and a five-step testing procedure that allowed us to identify six motion-sensitive regions within the STS. Direction adaptation tests confirmed the motion sensitivity of these six regions. Five of them [MT/V5, its three satellites, and the middle part of the STP (STPm) region in the upper bank of the STS] have been documented by previous single-cell studies. A sixth, previously unknown motion-responsive region, which we termed the lower superior temporal (LST) region, was observed on the lower bank and fundus of the STS, 6-8 mm anterior to the FST area. In contrast to the MST areas, the LST region responds to slow as well as fast speeds and is responsive to static and moving images of objects, to patterns defined by opponent motion, and to actions. These results, obtained in both group and single-subject analyses, suggest that motion information in the STS might follow a second path, in addition to the MT/V5-MST path. This ventral path including the LST region, FST area, and STPm region is likely involved in the visual analysis of actions and biological motion. PMID:16738235

Nelissen, Koen; Vanduffel, Wim; Orban, Guy A

2006-05-31

317

The Comparison of Some Psychological Skills of Superior and Non-Superior Male Karate Kas Dispatched to Japan World Competitions (2008)  

Microsoft Academic Search

2 Abstract: The aim of the present study was to compare some psychological skills of superior and non-superior male karate kas dispatched to Japan World Competitions (2008). The statistical population of this study includes all the superior male karate kas participated in the elective competitions of Iran karate national team in order to be dispatched to Japan world competitions. South

Y. Mohammadzadeh; M. H. Boostani; M. A. Boostani

318

Ocular Surface Squamous Neoplasia Masquerading as Superior Limbic Keratoconjunctivitis  

PubMed Central

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

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

2011-01-01

319

Ocular surface squamous neoplasia masquerading as superior limbic keratoconjunctivitis.  

PubMed

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

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

2011-01-01

320

False memories in highly superior autobiographical memory individuals  

PubMed Central

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

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

2013-01-01

321

Superior episodic memory is associated with interhemispheric processing  

Microsoft Academic Search

The dependence of episodic memories on interhemispheric processing was tested. In Exper- iment 1, positive familial sinistrality (FS+; e.g., presence of left-handed relatives) was associated with superior episodic memory and inferior implicit memory in comparison with negative familial sinistrality (i.e., FS-). This reflected a greater degree of interhemispheric interaction in FS+ participants, which was hypothesized as facilitating episodic memory. In

Stephen D. Christman; Ruth E. Propper

2001-01-01

322

Age-Related Attenuation of Dominant Hand Superiority  

Microsoft Academic Search

BackgroundThe decline of motor performance of the human hand-arm system with age is well-documented. While dominant hand performance is superior to that of the non-dominant hand in young individuals, little is known of possible age-related changes in hand dominance. We investigated age-related alterations of hand dominance in 20 to 90 year old subjects. All subjects were unambiguously right-handed according to

Tobias Kalisch; Claudia Wilimzig; Nadine Kleibel; Martin Tegenthoff; Hubert R. Dinse; Chris Miall

2006-01-01

323

Age-Related Attenuation of Dominant Hand Superiority  

Microsoft Academic Search

Background. The decline of motor performance of the human hand-arm system with age is well-documented. While dominant hand performance is superior to that of the non-dominant hand in young individuals, little is known of possible age-related changes in hand dominance. We investigated age-related alterations of hand dominance in 20 to 90 year old subjects. All subjects were unambiguously right-handed according

Tobias Kalisch; Claudia Wilimzig; Nadine Kleibel; Martin Tegenthoff; Hubert R. Dinse

2006-01-01

324

The distribution and abundance of planktonic diatoms in Lake Superior  

USGS Publications Warehouse

The principal diatoms collected at 14 stations in Lake Superior were Cyclotella "glomerata-stelligera" [= C. glomerata and C. stelligera combined], Cyclotella "ocellata-kutzingiana", Fragilaria crotonensis, and Rhizosolenia eriensis. Concentrations were heaviest in the Apostle Islands region (up to 2,160 per ml) and lightest northwest of the Keweenaw Peninsula (68 to 78 per ml). Species composition differed in different parts of the lake.

Holland, Ruth E.

1965-01-01

325

Pancreaticoduodenal Artery Aneurysm Formation with Superior Mesenteric Artery Stenosis  

PubMed Central

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

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

2014-01-01

326

Habitat change in a perched dune system along Lake Superior  

USGS Publications Warehouse

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

Loope, Walter L.; McEachern, A. Kathryn

1998-01-01

327

Prey selection by the Lake Superior fish community  

USGS Publications Warehouse

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

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

2012-01-01

328

Systemic and pulmonary venous connections in visceral heterotaxy with asplenia: Diagnostic and surgical considerations based on seventy-two autopsied cases  

Microsoft Academic Search

To facilitate the preoperative diagnosis and surgical management of visceral heterotaxy and asplenia, 72 postmortem cases were reviewed with particular attention focused on the systemic and pulmonary venous connections. The superior vena cava was bilateral in 51 cases (71%), but in 9 cases one of the superior venae cavae was partly or totally atretic. Patent bilateral superior venae cavae were

Maurizio Rubino; Stella Van Praagh; Keishi Kadoba; Renzo Pessotto; Richard Van Praagh

1995-01-01

329

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

Microsoft Academic Search

Complex Adaptive Systems of Systems, or CASoS, are vastly complex ecological, sociological, economic and\\/or technical systems which we must understand to design a secure future for the nation and the world. Perturbations\\/disruptions in CASoS have the potential for far-reaching effects due to pervasive interdependencies and attendant vulnerabilities to cascades in associated systems. Phoenix was initiated to address this high-impact problem

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

2011-01-01

330

Superior Valley photovoltaic power processing and system controller evaluation  

SciTech Connect

Sandia National Laboratories, sponsored by the US Department of Energy`s Office of Energy Management, conducts the photovoltaic balance-of-system program. Under this program, Sandia supports the Department of Defense Strategic Environmental Research Development Plan, SERDP, which is advancing the use of photovoltaics in operational DoD facilities. This report details the acceptance testing of the first of these photovoltaic hybrid systems: the Superior Valley photovoltaic-diesel hybrid system. This is the first of several photovoltaic installations for the Department of Defense. The system hardware tested at Sandia included an inverter, maximum power trackers, and a system controller.

Bonn, R.; Ginn, J.; Zirzow, J.; Sittler, G.

1995-11-01

331

Hydrocal II process for superior naphthenic lube oils  

SciTech Connect

The HydroCall II Process is an advanced technology process to produce superior napthenic base lube oil stocks and specialty products. All products will be unlabeled and cover the full viscosity range of 30 to 4000 SUS at 100/sup 0/F. The process features high pressure, multiple stages, a multiple catalyst system and plurality of reactors and catalyst beds to achieve selective conversion of specific aromatic types contained in typical naphthenic lube oil feedstocks. Calumet's new HydroCall II oils will be available to the industry the latter part of 1987.

Rausch, M.K.; Love, G.A.; Tollefsen, G.E.

1987-01-01

332

Effect of nifedipine on superior mesenteric artery impedance in humans  

Microsoft Academic Search

Objective: In a randomized, double-blind placebo-controlled study the acute effect of sublingual nifedipine (10 mg) on the superior\\u000a mesenteric artery pulsatility index (PI) was studied over 60 min in 12 healthy subjects (Age 43 y).\\u000a \\u000a Methods:\\u000a \\u000a \\u000a PI was considered as a parameter of vascular resistance and was calculated as the peak-to-peak amplitude of the waveform divided\\u000a by the mean amplitude.

D. Voet; S. Mareels; D. Duprez; M. De Buyzere; M. Afschrift; D. L. Clement

1996-01-01

333

Douglass Houghton and the Precambrian of Lake Superior  

SciTech Connect

The first chronological subdivision of Precambrian rocks in the Lake Superior area was made in 1841 by Douglass Houghton for the Upper Peninsula of Michigan. In spite of the fact that the then prevailing philosophy of geologic history was quite different from that of today, Houghton's chronological subdivision became the commonly accepted framework for Precambrian studies on the south shore of Lake Superior. Using only megascopic rock analyses and the physical stratigraphic criteria of relative age, Houghton and his assistants recognized these division, in ascending order: the Primary (granite-gneiss-greenstone); the Metamorphic (slates, iron ore, quartz rock); and on the Keweenaw Peninsula, the Trap (with copper ore); the Trap Conglomerate; and the Red Sandrock. This Pioneer study demanded heroic effort and imagination because the swampy, forested terrain was barely penetrable, the outcrops are discontinuous, the rocks are often deformed, and the lithology changes locally within the formations. Houghton was aided in these accomplishments by William A. Burt, a US Linear Surveyor and the inventor of the solar compass, a sextant-like device used to supplement the surveyors compass. Together, Houghton and Burt formed the first combined geological-linear survey in the US. The combined survey was completed by the assistants Houghton had trained so well, William Burt and Bela Hubbard. Their reports (1846, 1847) supplemented Houghton's report of 1841 by showing the areal distribution of the exposed Precambrian rocks in the region thus facilitating future research, prospecting, and development.

Merk, G.

1985-01-01

334

A new look at the Lake Superior biomass size spectrum  

USGS Publications Warehouse

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

Yurista, Peder M.; Yule, Daniel; 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

335

Superior Cross-Species Reference Genes: A Blueberry Case Study  

PubMed Central

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

Die, Jose V.; Rowland, Lisa J.

2013-01-01

336

Fish community change in Lake Superior, 1970-2000  

USGS Publications Warehouse

Changes in Lake Superior's fish community are reviewed from 1970 to 2000. Lake trout (Salvelinus namaycush) and lake whitefish (Coregonus clupeaformis) stocks have increased substantially and may be approaching ancestral states. Lake herring (Coregonus artedi) have also recovered, but under sporadic recruitment. Contaminant levels have declined and are in equilibrium with inputs, but toxaphene levels are higher than in all other Great Lakes. Sea lamprey (Petromyzon marinus) control, harvest limits, and stocking fostered recoveries of lake trout and allowed establishment of small nonnative salmonine populations. Natural reproduction supports most salmonine populations, therefore further stocking is not required. Nonnative salmonines will likely remain minor components of the fish community. Forage biomass has shifted from exotic rainbow smelt (Osmerus mordax) to native species, and high predation may prevent their recovery. Introductions of exotics have increased and threaten the recovering fish community. Agencies have little influence on the abundance of forage fish or the major predator, siscowet lake trout, and must now focus on habitat protection and enhancement in nearshore areas and prevent additional species introductions to further restoration. Persistence of Lake Superior's native deepwater species is in contrast to other Great Lakes where restoration will be difficult in the absence of these ecologically important fishes.

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

2003-01-01

337

High Resolution Visualizations of Lake Floor Structures in Lake Superior.  

NASA Astrophysics Data System (ADS)

High resolution visualizations of acoustic data collected in Lake Superior reveals that the lake floor is not a featureless basin, rather that it possesses fine-scale features. These are the "fingerprints" of processes that have shaped the development of the basin. Some of these are no longer active while others continue today. Some of the most interesting lake floor features observed in Lake Superior are the ring shaped depressions that are widely developed in areas below wave-base, where fine-grained sediments are preserved. These features are typically 100-300m across, 25-50m wide and up to 5m deep. They occur both as interconnected clusters and also as isolated structures. Multibeam imagery reveals that rings are composed of chains of pockmarks. They are believed to be the product of dewatering of the Holocene glacio-lacustrine clays that compose the lake floor. High resolution seismic reflection data, collected with a 28 kHz echosounder, shows evidence of a layer bound system of small extensional faults that is widely developed in the very fine grained glacio-lacustrine clays. They exhibit a polygonal plan form geometry with a large range of strikes and oblique to orthogonal intersection geometries. They have been interpreted to be an immature polygonal fault system. Discrete horizons exhibiting lateral variations in thickness and zones of acoustic blanking are interpreted to be evidence of post-depositional remobilization of the lake floor sediments.

Wattrus, N. J.; Cartwright, J.; Rausch, D.

2004-12-01

338

Synchronous celiac axis and superior mesenteric artery embolism.  

PubMed

We present a case of combined celiac axis and superior mesenteric artery embolism in a 70-year-old patient that was examined in emergency department for atrial fibrillation and diffuse abdominal pain. Standard abdominal x-ray showed air in the portal vein. CT scan with contrast showed air in the lumen of the stomach and small intestine, bowel distension with wall thickening, and a free gallstone in the abdominal cavity. Massive embolism of both celiac axis and superior mesenteric artery was seen after contrast administration. On laparotomy, complete necrosis of the liver, spleen, stomach and small intestine was found. Gallbladder was gangrenous and perforated, and the gallstone had migrated into the abdominal cavity. We found free air that crackled on palpation of the veins of the gastric surface. The patient,s condition was incurable and she died of multiple organ failure a few hours after surgery. Acute visceral thromboembolism should always be excluded first if a combination of atrial fibrillation and abdominal pain exists. Determining the serum levels of d-dimers and lactate, combined with CT scan with contrast administration can, in most cases, confirm the diagnosis and lead to faster surgical intervention. It is crucial to act early on clinical suspicion and not to wait for the development of hard evidence. PMID:22090184

Rajkovic, Z; Zelic, Z; Papes, D; Cizmek, K; Arslani, N

2011-11-01

339

In Vivo Evaluation of the Effects of Gravitational Force (+Gz) on Over-the-Wire Stainless Steel Greenfield Inferior VenaCava Filter in Swine  

SciTech Connect

This study was done to determine the effect of exposure to gravitational force (acceleration stress) on invivo over-the-wire stainless steel Greenfield inferior vena cavafilters. Fifteen pigs underwent venous cut down and placement of a stainless steel Greenfield filter. A 4-week observation period simulated realistic convalescence and allowed sufficient time for epithelialization. Ten pigs were exposed to acceleration stress in a centrifuge (3G run for 15 sec followed by rest until return to baseline heart rate, then a 9G run for 15 sec), with inertial loading in ahead-to-tail direction (+Gz). Fluoroscopy during acceleration stress allowed assessment for filter migration. Five pigs were not exposed to acceleration stress. AP and lateral abdominal radiographs were obtained at post-filter placement, convalescence, and centrifuge exposure to determine the position and integrity of the filter. All 15 IVCs were resected and evaluated for gross or histological injury to the vessel wall. IVC filter placement was technically successful in all 15 pigs.Radiographic measurements were limited secondary to differences in pig positioning. Fluoroscopy showed no filter migration. All filters were securely attached to the vena cava by the hooks without gross evidence of perforation or hemorrhage. There were varying degrees of fibroplasia involving the hooks and tip of the filters in both the control and experimental groups. Histologically, there was evidence of prior hemorrhage at the level of the hooks, which was similar between the control and experimental groups. It is concluded that Greenfield filter position and vena caval integrity at the implantation site is unaffected by high acceleration stress.

Sherman, P.M., E-mail: Paul.Sherman@USAFA90.com; Soares, G.M. [WilfordHall Medical Center, 2200 Bergquist Drive, Ste 1, Lackland AFB, TX 78236-5300, Department of Radiology (United States); Dick, E.J.; Harroff, H.H. [ClinicalResearch Squadron, 59CRES/MSRO, 1225 Wilford Hall Loop, LacklandAFB, TX 78236 (United States); Werchan, P.M. [AirForce Research Laboratory, AFRL/HEPM, 2504 Gillingham Drive, Ste25, Brooks AFB, TX 78235-5104 (United States); Davis, M.R.; Ortegon, D.P. [WilfordHall Medical Center, 2200 Bergquist Drive, Ste 1, Lackland AFB, TX 78236-5300, Department of General Surgery (United States)

2003-08-15

340

Lymphatic Pump Treatment Increases Thoracic Duct Lymph Flow in Conscious Dogs with Edema Due to Constriction of the Inferior Vena Cava  

PubMed Central

Abstract Background Osteopathic lymphatic pump treatments (LPT) are used to treat edema, but their direct effects on lymph flow have not been studied. In the current study, we examined the effects of LPT on lymph flow in the thoracic duct of instrumented conscious dogs in the presence of edema produced by constriction of the inferior vena cava (IVC). Methods and Results Six dogs were surgically instrumented with an ultrasonic flow transducer on the thoracic lymph duct and catheters in the descending thoracic aorta and in IVC. After postoperative recovery, lymph flow and hemodynamic variables were measured 1) pre-LPT, 2) during 4?min LPT, 3) post-LPT, in the absence and presence of edema produced by IVC constriction. This constriction increased abdominal girth from 60?±?2.6 to 75?±?2.9?cm. Before IVC constriction, LPT increased lymph flow (P?

Prajapati, Parna; Shah, Pankhil; King, Hollis H.; Williams, Arthur G.; Desai, Pratikkumar

2010-01-01

341

Effects of Ecklonia cava ethanolic extracts on airway hyperresponsiveness and inflammation in a murine asthma model: role of suppressor of cytokine signaling.  

PubMed

Ecklonia cava (EC) is a brown alga that evidences radical scavenging activity, bactericidal activity, tyrosinase inhibitory activity, and protease inhibitory activity. However, its anti-allergic effects remain poorly understood. In the current study, we attempted to determine whether pretreatment with EC induces a significant inhibition of asthmatic reactions in a mouse asthma model. Mice sensitized and challenged with ovalbumin (OVA) evidenced typical asthmatic reactions, as follows: an increase in the number of eosinophils in bronchoalveolar lavage fluid; a marked influx of inflammatory cells into the lung around blood vessels and airways, and airway luminal narrowing; the development of airway hyperresponsiveness; the detection of tumor necrosis factor-alpha (TNF-alpha) and Th2 cytokines, including IL-4 and IL-5 in the bronchoalveolar lavage (BAL) fluid; and the detection of allergen-specific immunoglobulin E (IgE) in the serum. However, the administration of EC extract prior to the final airway OVA challenge resulted in a significant inhibition of all asthmatic reactions. We also demonstrated that EC extracts treatment resulted in significant reductions on matrix metalloproteinase-9 (MMP-9) and Suppressor of cytokine signaling-3 (SOCS-3) expression and a reduction in the increased eosinophil peroxidase (EPO) activity. The treatment of animals with EC extracts resulted in a significant reduction in the concentrations of the Th2 cytokine (IL-4 and IL-5) in the airways, without any concomitant increase in the concentration of Th1 cytokines. These findings indicate that EC extracts may prove useful as an adjuvant therapy for allergic airway reactions via the inhibition of the Th2 response. Accordingly, this study may provide evidence that EC extract performs a critical function in the amelioration of the pathogenetic process of asthma in mice. PMID:17804193

Kim, Se-Kwon; Lee, Da-Young; Jung, Won-Kyo; Kim, Ji-Hye; Choi, Inhak; Park, Sae-Gwang; Seo, Su-Kil; Lee, Soo-Woong; Lee, Chang Min; Yea, Sung Su; Choi, Yung Hyun; Choi, Il-Whan

2008-06-01

342

76 FR 11332 - Drawbridge Operation Regulation; Duluth Ship Canal, Duluth-Superior Harbor, MN  

Federal Register 2010, 2011, 2012, 2013

...Operation Regulation; Duluth Ship Canal, Duluth- Superior Harbor, MN AGENCY: Coast Guard, DHS. ACTION: Final rule...Operation Regulation; Duluth Ship Canal, Duluth-Superior Harbor, MN. in the Federal Register (75 FR 76324). We received two...

2011-03-02

343

Summer activities Cursos de espaol para extranjeros (Centro Superior de Idiomas de la UA)  

E-print Network

Summer activities Idiomas Cursos de español para extranjeros (Centro Superior de Idiomas de la UA (IELTS, PET, FCE) (Centro Superior de Idiomas de la UA) Estancias lingüísticas en el extranjero (Centro Superior de Idiomas de la UA). AULAS Junior: inglés para niños/as de 14 a 16 años (Centro Superior de

Escolano, Francisco

344

Habitat Use and Movement Patterns of Brook Trout in Nipigon Bay, Lake Superior  

Microsoft Academic Search

Brook trout Salvelinus fontinalis are one of two salmonine species native to Lake Superior. Abundant and widely distributed a century ago, Lake Superior's brook trout (coasters) have been reduced to a few remnant stocks, probably as a result of exploitation and habitat loss. Twenty brook trout captured in Nipigon Bay, Lake Superior, were surgically implanted with radio transmitters and were

Jamie M. Mucha; Robert W. Mackereth

2008-01-01

345

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

E-print Network

in Lake Superior. They found that with the onset of thermal stratification (mid-July), the epilimneticCausal 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

Matsumoto, Katsumi

346

Designing functionally graded materials with superior load-bearing properties.  

PubMed

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 guidelines for designing FGMs 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 (E(b)/E(s)) on stress distribution through the graded layer. Theory predicts that a low exponent (0.15superior load-bearing capacity, 20-50% 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

Zhang, Yu; Sun, Ming-Jie; Zhang, Denzil

2012-03-01

347

Frontal and superior temporal auditory processing abnormalities in schizophrenia?  

PubMed Central

Background Although magnetoencephalography (MEG) studies show superior temporal gyrus (STG) auditory processing abnormalities in schizophrenia at 50 and 100 ms, EEG and corticography studies suggest involvement of additional brain areas (e.g., frontal areas) during this interval. Study goals were to identify 30 to 130 ms auditory encoding processes in schizophrenia (SZ) and healthy controls (HC) and group differences throughout the cortex. Methods The standard paired-click task was administered to 19 SZ and 21 HC subjects during MEG recording. Vector-based Spatial–temporal Analysis using L1-minimum-norm (VESTAL) provided 4D maps of activity from 30 to 130 ms. Within-group t-tests compared post-stimulus 50 ms and 100 ms activity to baseline. Between-group t-tests examined 50 and 100 ms group differences. Results Bilateral 50 and 100 ms STG activity was observed in both groups. HC had stronger bilateral 50 and 100 ms STG activity than SZ. In addition to the STG group difference, non-STG activity was also observed in both groups. For example, whereas HC had stronger left and right inferior frontal gyrus activity than SZ, SZ had stronger right superior frontal gyrus and left supramarginal gyrus activity than HC. Conclusions Less STG activity was observed in SZ than HC, indicating encoding problems in SZ. Yet auditory encoding abnormalities are not specific to STG, as group differences were observed in frontal and SMG areas. Thus, present findings indicate that individuals with SZ show abnormalities in multiple nodes of a concurrently activated auditory network. PMID:24179821

Chen, Yu-Han; Edgar, J. Christopher; Huang, Mingxiong; Hunter, Michael A.; Epstein, Emerson; Howell, Breannan; Lu, Brett Y.; Bustillo, Juan; Miller, Gregory A.; Canive, Jose M.

2013-01-01

348

Metabolic Maturation of Auditory Neurones in the Superior Olivary Complex  

PubMed Central

Neuronal activity is energetically costly, but despite its importance, energy production and consumption have been studied in only a few neurone types. Neuroenergetics is of special importance in auditory brainstem nuclei, where neurones exhibit various biophysical adaptations for extraordinary temporal precision and show particularly high firing rates. We have studied the development of energy metabolism in three principal nuclei of the superior olivary complex (SOC) involved in precise binaural processing in the Mongolian gerbil (Meriones unguiculatus). We used immunohistochemistry to quantify metabolic markers for energy consumption (Na+/K+-ATPase) and production (mitochondria, cytochrome c oxidase activity and glucose transporter 3 (GLUT3)). In addition, we calculated neuronal ATP consumption for different postnatal ages (P0–90) based upon published electrophysiological and morphological data. Our calculations relate neuronal processes to the regeneration of Na+ gradients perturbed by neuronal firing, and thus to ATP consumption by Na+/K+-ATPase. The developmental changes of calculated energy consumption closely resemble those of metabolic markers. Both increase before and after hearing onset occurring at P12–13 and reach a plateau thereafter. The increase in Na+/K+-ATPase and mitochondria precedes the rise in GLUT3 levels and is already substantial before hearing onset, whilst GLUT3 levels are scarcely detectable at this age. Based on these findings we assume that auditory inputs crucially contribute to metabolic maturation. In one nucleus, the medial nucleus of the trapezoid body (MNTB), the initial rise in marker levels and calculated ATP consumption occurs distinctly earlier than in the other nuclei investigated, and is almost completed by hearing onset. Our study shows that the mathematical model used is applicable to brainstem neurones. Energy consumption varies markedly between SOC nuclei with their different neuronal properties. Especially for the medial superior olive (MSO), we propose that temporally precise input integration is energetically more costly than the high firing frequencies typical for all SOC nuclei. PMID:23826275

Trattner, Barbara; Gravot, Celine Marie; Grothe, Benedikt; Kunz, Lars

2013-01-01

349

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

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…

Michigan Education Association, East Lansing.

350

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

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…

Michigan Education Association, East Lansing.

351

Transient Neurologic Deterioration after Total Removal of Parasagittal Meningioma Including Completely Occluding Superior Sagittal Sinus  

PubMed Central

In surgical planning of the parasagittal meningioma, invasion and occlusion of the superior sagittal sinus are important factors. When tumor is located within anterior 1/3, or when angiographic finding shows total occlusion of superior sagittal sinus, it is regarded that the ligation of superior sagittal sinus is safe. We report a case of parasagittal meningioma in 59-year-old male patient with complete occlusion of superior sagittal sinus which was confirmed by preoperative angiography, who developed temporary neurologic deterioration after superior sagittal sinus ligation and resection. PMID:19707499

Oh, In Ho; Choi, Seok Keun; Lim, Young Jin

2009-01-01

352

Complex Adaptive Systems of Systems (CASOS) engineering environment.  

SciTech Connect

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

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

2012-02-01

353

Reproductive success of herring gulls breeding on Lake Superior  

SciTech Connect

Herring gulls breed in the vicinity of three pulp mills located on the north shore of Lake Superior. The impacts of exposure to effluents produced by these mills on various aspects of the reproductive biology of this species have been monitored since 1992. Reproductive success at these sites has been either zero or below the level necessary to maintain a stable population. Levels of dioxins and furans in the eggs and tissues of herring gulls did not show any consistent trends between the exposed and control sites and were generally low. Additionally, TCDD TEQs calculated for the same colonies, with the inclusion of several non ortho-substituted PCBs, were well below levels thought to result in reproductive impairment of herring gulls. However, plasma and liver concentrations of retinol were depressed and variable at several colonies, indicating potential diet differences between the study sites. Further determination of food types consumed at the control and exposed sites revealed that fish, the traditional diet of this species, was a small or insignificant component of the diet. Food type was also correlated with contaminant burden and reproductive output. Previously collected data as well as current results will be discussed.

Shutt, J.L. [Canadian Wildlife Service, Hull, Quebec (Canada)

1994-12-31

354

Superior longitudinal fasciculus and language functioning in healthy aging.  

PubMed

Structural deterioration of brain tissue in older adults is thought to be responsible for the majority of age-related cognitive decline. Disruption of widespread cortical networks due to a loss of axonal integrity may also play an important role. Research examining correlations between structural change and functional decline has focused heavily on working memory, processing speed, and executive processes while other aspects of cognition, such as language functioning, have received less attention. The current study aimed to determine whether age-related changes in the superior longitudinal fasciculus (SLF), are responsible for the deterioration in language functioning associated with age. Subjects included 112 right-handed volunteers (ages 19-76). For each subject, the SLF of the left hemisphere was reconstructed from diffusion tensor images (DTI). Mean fractional anisotropy (FA) values were extracted from parietal (SLFp) and temporal (SLFt) bundles. Language functioning was measured using the Peabody Picture Vocabulary Test (PPVT), Boston Naming Test (BNT), Controlled Oral Word Association Test (COWAT), and Semantic Fluency Test (SFT). Regression analyses revealed that males and females showed a different pattern of decline in FA across adulthood. For males, greater SLFt FA was significantly associated with increased COWAT performance, and there was a positive relationship between both age and SLFp FA with BNT scores. In females, greater SLFp FA was related to lower COWAT performance. Taken together, the results suggest that white matter integrity of the SLF follows a different pattern of decline in adulthood for males and females, and this decline differentially affects language functioning. PMID:24680744

Madhavan, Kiely M; McQueeny, Tim; Howe, Steven R; Shear, Paula; Szaflarski, Jerzy

2014-05-01

355

Dynamics of a yellow perch population in western Lake Superior  

USGS Publications Warehouse

Yellow perch (Perca flavescens) were sampled annually in 1973-1988 with bottom trawls in Chequamegon Bay, Lake Superior. Biomass averaged 1.6 kg/hectare. Fish 1-3 years old made up 64% of the biomass, whereas fish of harvestable size (>=4 years old) made up only 31% of the biomass. Year-class strength was variable among years, but a Ricker recruitment function described the relation between year-class strength and parental stock size. Age-specific mortality increased substantially as fish became sexually mature at age 4, perhaps as a result of energy depletion associated with high reproductive and maintenance costs in a suboptimal thermal environment. Yield-per-recruit analysis indicated that most of the age-specific annual mortality was due to natural causes. Natural mortality, rather than limited recruitment or fishing mortality, was the major factor controlling harvestable stock size. Regardless of the size of a year-class produced, natural mortality greatly reduced its abundance, prior to maturity and recruitment to the fishable stock. This high mortality, combined with very slow growth, limits the biomass potential of the harvestable stock, and sustainable yields from this population are therefore low.

Bronte, Charles R.; Selgeby, James H.; Swedberg, Donald V.

1993-01-01

356

A superior descriptor of random textures and its predictive capacity  

PubMed Central

Two-phase random textures abound in a host of contexts, including porous and composite media, ecological structures, biological media, and astrophysical structures. Questions surrounding the spatial structure of such textures continue to pose many theoretical challenges. For example, can two-point correlation functions be identified that can be manageably measured and yet reflect nontrivial higher-order structural information about the textures? We present a solution to this question by probing the information content of the widest class of different types of two-point functions examined to date using inverse “reconstruction” techniques. This enables us to show that a superior descriptor is the two-point cluster function C2(r), which is sensitive to topological connectedness information. We demonstrate the utility of C2(r) by accurately reconstructing textures drawn from materials science, cosmology, and granular media, among other examples. Our work suggests a theoretical pathway to predict the bulk physical properties of random textures and that also has important ramifications for atomic and molecular systems. PMID:19805040

Jiao, Y.; Stillinger, F. H.; Torquato, S.

2009-01-01

357

Modeling the Value of Strategic Actions in the Superior Colliculus  

PubMed Central

In learning models of strategic game play, an agent constructs a valuation (action value) over possible future choices as a function of past actions and rewards. Choices are then stochastic functions of these action values. Our goal is to uncover a neural signal that correlates with the action value posited by behavioral learning models. We measured activity from neurons in the superior colliculus (SC), a midbrain region involved in planning saccadic eye movements, while monkeys performed two saccade tasks. In the strategic task, monkeys competed against a computer in a saccade version of the mixed-strategy game ”matching-pennies”. In the instructed task, saccades were elicited through explicit instruction rather than free choices. In both tasks neuronal activity and behavior were shaped by past actions and rewards with more recent events exerting a larger influence. Further, SC activity predicted upcoming choices during the strategic task and upcoming reaction times during the instructed task. Finally, we found that neuronal activity in both tasks correlated with an established learning model, the Experience Weighted Attraction model of action valuation (Camerer and Ho, 1999). Collectively, our results provide evidence that action values hypothesized by learning models are represented in the motor planning regions of the brain in a manner that could be used to select strategic actions. PMID:20161807

Thevarajah, Dhushan; Webb, Ryan; Ferrall, Christopher; Dorris, Michael C.

2009-01-01

358

Emotional context enhances auditory novelty processing in superior temporal gyrus.  

PubMed

Visualizing emotionally loaded pictures intensifies peripheral reflexes toward sudden auditory stimuli, suggesting that the emotional context may potentiate responses elicited by novel events in the acoustic environment. However, psychophysiological results have reported that attentional resources available to sounds become depleted, as attention allocation to emotional pictures increases. These findings have raised the challenging question of whether an emotional context actually enhances or attenuates auditory novelty processing at a central level in the brain. To solve this issue, we used functional magnetic resonance imaging to first identify brain activations induced by novel sounds (NOV) when participants made a color decision on visual stimuli containing both negative (NEG) and neutral (NEU) facial expressions. We then measured modulation of these auditory responses by the emotional load of the task. Contrary to what was assumed, activation induced by NOV in superior temporal gyrus (STG) was enhanced when subjects responded to faces with a NEG emotional expression compared with NEU ones. Accordingly, NOV yielded stronger behavioral disruption on subjects' performance in the NEG context. These results demonstrate that the emotional context modulates the excitability of auditory and possibly multimodal novelty cerebral regions, enhancing acoustic novelty processing in a potentially harming environment. PMID:18996910

Domínguez-Borràs, Judith; Trautmann, Sina-Alexa; Erhard, Peter; Fehr, Thorsten; Herrmann, Manfred; Escera, Carles

2009-07-01

359

Gillnet selectivity for lake trout (Salvelinus namaycush) in Lake Superior  

USGS Publications Warehouse

Gillnet selectivity for lake trout (Salvelinus namaycush) was estimated indirectly from catches in nets of 102-, 114-, 127-, 140-, and 152-mm stretch measure. Mesh selectivity was modeled as a nonlinear response surface that describes changes in the mean, standard deviation, and skewness of fish lengths across mesh sizes. Gillnet selectivity for lake trout was described by five parameters that explained 88% of the variation in wedged and entangled catches, 81% of the variation in wedged catches, and 82% of the variation in entangled catches. Combined catches of wedged and entangled lake trout were therefore described more parsimoniously than separate catches of wedged and entangled lake trout. Peak selectivity of wedged and entangled fish increased from 588 to 663 mm total length as mesh size increased from 102 to 152 mm, and relative selectivity peaked at a total length of 638 mm. The estimated lake trout population size-frequency indicated that gillnet catches were negatively biased toward both small and large lake trout. As a consequence of this bias, survival of Lake Superior lake trout across ages 9-11 was underestimated by about 20% when the catch curve was not adjusted for gillnet selectivity.

Hansen, Michael J.; Madenjian, Charles P.; Selgeby, James H.; Helser, Thomas E.

1997-01-01

360

Planar heterojunction perovskite solar cells with superior reproducibility  

PubMed Central

Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies have rapidly increased to over 10%, and further improvements are expected. However, the poor device reproducibility of PeSCs ascribed to their inhomogeneously covered film morphology has hindered their practical application. Here, we demonstrate high-performance PeSCs with superior reproducibility by introducing small amounts of N-cyclohexyl-2-pyrrolidone (CHP) as a morphology controller into N,N-dimethylformamide (DMF). As a result, highly homogeneous film morphology, similar to that achieved by vacuum-deposition methods, as well as a high PCE of 10% and an extremely small performance deviation within 0.14% were achieved. This study represents a method for realizing efficient and reproducible planar heterojunction (PHJ) PeSCs through morphology control, taking a major step forward in the low-cost and rapid production of PeSCs by solving one of the biggest problems of PHJ perovskite photovoltaic technology through a facile method. PMID:25377945

Jeon, Ye-Jin; Lee, Sehyun; Kang, Rira; Kim, Jueng-Eun; Yeo, Jun-Seok; Lee, Seung-Hoon; Kim, Seok-Soon; Yun, Jin-Mun; Kim, Dong-Yu

2014-01-01

361

Superior piezoelectric composite films: taking advantage of carbon nanomaterials.  

PubMed

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

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

362

Superior piezoelectric composite films: taking advantage of carbon nanomaterials  

NASA Astrophysics Data System (ADS)

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.

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

363

Predictive saccade target selection in superior colliculus during visual search.  

PubMed

Searching for a visual object naturally involves sequences of gaze fixations, during which the current foveal image is analyzed and the next object to inspect is selected as a saccade target. Fixation durations during such sequences are short, suggesting that saccades may be concurrently processed. Therefore, the selection of the next saccade target may occur before the current saccade target is acquired. To test this hypothesis, we trained four female rhesus monkeys (Macaca mulatta) to perform a multiple-fixation visual conjunction search task. We simultaneously recorded the activity of sensorimotor neurons in the midbrain superior colliculus (SC) in two monkeys. In this task, monkeys made multiple fixations before foveating the target. Fixation durations were significantly shorter than the latency of the initial responses to the search display, with approximately one-quarter being shorter than the shortest response latencies. The time at which SC sensorimotor activity discriminated the target from distracters occurred significantly earlier for the selection of subsequent fixations than for the selection of the first fixation. Target selection during subsequent fixations occurred even before the visual afferent delay in more than half of the neuronal sample, suggesting that the process of selection can encompass at least two future saccade targets. This predictive selection was present even when differences in saccade latencies were taken into account. Altogether, these findings demonstrate how neural representations on the visual salience map are processed in parallel, thus facilitating visual search. PMID:24741054

Shen, Kelly; Paré, Martin

2014-04-16

364

Deposition versus photochemical removal of PBDEs from Lake Superior air.  

PubMed

Analysis of a sediment core collected from Siskiwit Lake, located on a remote island in Lake Superior, provides evidence that polybrominated diphenyl ethers (PBDEs) are removed effectively from the atmosphere via deposition processes during long-range transport. A mass balance model based on photochemical rate constants and data from atmospheric samples was created to understand the relative importance of various photochemical and deposition processes in removing PBDEs from the atmosphere. Photolysis rate constants were derived from UV absorption spectra of 25 PBDEs recorded in isooctane over the range of 280-350 nm at 298 K. Photolysis decays measured for BDE-3 and -7 in the gas phase were substantial compared to a well-defined chemical actinometer, indicating that their photolysis quantum yields are significant. Dibenzofuran production was observed when PBDE congeners containing ortho-bromines were photolyzed in helium. From estimates of removal rates of PBDEs from the lower troposphere, we find that wet and dry deposition accountfor >95% of the removal of BDE-209, while photolysis accounts for -90% of the removal of gas-phase congeners such as BDE-47. These results help explain the deposition patterns of PBDEs found in lake and river sediments and have important implications concerning the inclusion of photolysis as a fate process in multimedia models. PMID:17969687

Raff, Jonathan D; Hites, Ronald A

2007-10-01

365

Energetic Particle Synthesis of Metastable Layers for Superior Mechanical Properties  

SciTech Connect

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.

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

366

Planar heterojunction perovskite solar cells with superior reproducibility.  

PubMed

Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies have rapidly increased to over 10%, and further improvements are expected. However, the poor device reproducibility of PeSCs ascribed to their inhomogeneously covered film morphology has hindered their practical application. Here, we demonstrate high-performance PeSCs with superior reproducibility by introducing small amounts of N-cyclohexyl-2-pyrrolidone (CHP) as a morphology controller into N,N-dimethylformamide (DMF). As a result, highly homogeneous film morphology, similar to that achieved by vacuum-deposition methods, as well as a high PCE of 10% and an extremely small performance deviation within 0.14% were achieved. This study represents a method for realizing efficient and reproducible planar heterojunction (PHJ) PeSCs through morphology control, taking a major step forward in the low-cost and rapid production of PeSCs by solving one of the biggest problems of PHJ perovskite photovoltaic technology through a facile method. PMID:25377945

Jeon, Ye-Jin; Lee, Sehyun; Kang, Rira; Kim, Jueng-Eun; Yeo, Jun-Seok; Lee, Seung-Hoon; Kim, Seok-Soon; Yun, Jin-Mun; Kim, Dong-Yu

2014-01-01

367

Manual and Automated Measures of Superior Temporal Gyrus Asymmetry  

PubMed Central

The planum temporale is a region on the posterior surface of the temporal lobe that exhibits robust leftward structural asymmetry that has been linked to verbal ability in children and adults. Traditionally, structural asymmetry has been quantified with manual assessment of high resolution MRI scans. Such measures require subjective and frequently unreliable determination of highly variable anatomical boundaries. Methodological developments in automated image processing (voxel based morphometry -VBM) offer the opportunity to obtain objective and reliable measures of structural variation. This study examined the extent to which a VBM measure of gray matter asymmetry in the posterior superior temporal gyrus (pSTG) characterized the same individual variation as a manual measure of planum temporale asymmetry in 99 healthy adults and 39 typically developing children. Planum temporale asymmetry was significantly correlated with pSTG gray matter asymmetry in the samples of adults and children. As a measure of validity we examined the extent to which the VBM measure of pSTG gray matter asymmetry predicted measures of verbal ability that were associated with the manual measure of planum temporale asymmetry in the same children. The two asymmetry measures predicted the same variance in verbal ability. The automated measure of pSTG gray matter asymmetry predicted additional significant variance in verbal ability, however. In addition, a posterior STS region was also identified that significantly predicted verbal ability. These results demonstrate significant advantages of an automated voxel-based measure over a manual measure of planum temporale asymmetry. PMID:18440244

Eckert, Mark A.; Lombardino, Linda J.; Walczak, Adam R.; Bonihla, Leonardo; Leonard, Christiana M.; Binder, Jeffrey R.

2008-01-01

368

Simple and safe posterior superior alveolar nerve block  

PubMed Central

Background: The posterior superior alveolar nerve (PSAN) block is a dental nerve block used for profound anesthesia of the maxillary molars. Although it is being written in texts as a commonly used technique, but in dentistry it is rarely followed due to its nonreliable landmarks, variation in depth of insertion and frequent complications. The aim and objective are to find a technically simple method of the PSAN block without any complications. Study and Design: This study was based on the experience gained from 200 patients of 125 males and 75 female in age group of 20 to 65 years in University of Vinayaka and department of oral and maxillofacial surgery of VMS Dental College and hospital, Salem, Tamil Nadu. Results: In 200 patients’ positive anesthesia obtained within a period of 5 to 10 min. No visual complications reported in this study. There was no pain during and after extraction. Conclusion: This study shows this PSA nerve block using curved needle would avoid all complications reported in the literature. Therefore, the technique described in this study is an ideal option to anesthetize PSA nerve.

Thangavelu, K.; Kumar, N. Senthil; Kannan, R.; Kumar, J. Arun

2012-01-01

369

Age and growth of the whitefish in Lake Superior  

USGS Publications Warehouse

The average annual commercial production of whitefish in the U.S. waters of Lake Superior dropped from 2,194,000 pounds in 1879-1908 to 504,000 pounds in 1911-59. The modern production, though far below the earlier, has accounted for more than 10 percent of the total value of the fishery in all but one of the last 20 years. Data are given on growth rate, age and year-class composition, size distribution, and length-weight relation of 1,800 fish collected in 1957-59 at Bayfield, Wis., and Marquette, Whitefish Point, and Dollar Settlement, Mich. Studies of the body-scale relation, sex ratio, and age and size at maturity were limited to fish collected at Bayfield. The age composition and mean age varied widely by port and year of capture. Oldest fish were those of the 1957 Bayfield samples which were dominated by age group VII and averaged 5.5 years old. The youngest were from Whitefish Point in 1959; age-group III was dominant, and the mean age was 3.2 years. The evidence on the strength of year classes was not clear-cut, but it was obvious that fluctuations in stocks of different areas were largely independent. The percentage of legal-size fish (17 inches or longer) in age groups ranged widely; only 8.6 percent of the V group were legal in the 1957 Bayfield collections, whereas 100 percent of fish of the same age were legal in the 1957-59 collections from Whitefish Point. The weight of whitefish in the combined samples increased as the 3.2408 power of the length. The growth rate from the fastest to the slowest growing stocks ranked as follows: Whitefish Point; Dollar Settlement and Marquette (fish from the two ports reversed ranks after 3 years); Bayfield. The major differences in growth in length among the various stocks occurred during the first years of life. Beyond the fifth year the annual increments were nearly the same in all stocks. The whitefish from Whitefish Point, Dollar Settlement, and Marquette are among the fastest growing in the Great Lakes. The differences among the Lake Superior stocks in age and year-class composition, and in growth rate offer convincing evidence that populations of different areas are entirely independent. The sexes were almost equally represented (51.5 percent males) in the combined Bayfield samples, but males were scarce in age groups older than VIII. Whitefish from Bayfield shorter than 14.5 inches were immature and those larger than 17.4 inches were mature. The youngest mature fish belonged to age-group V,and all older than the VII group were mature.

Dryer, William R.

1963-01-01

370

The role of the superior laryngeal nerve in esophageal reflexes.  

PubMed

The aim of this study was to determine the role of the superior laryngeal nerve (SLN) in the following esophageal reflexes: esophago-upper esophageal sphincter (UES) contractile reflex (EUCR), esophago-lower esophageal sphincter (LES) relaxation reflex (ELIR), secondary peristalsis, pharyngeal swallowing, and belch. Cats (N = 43) were decerebrated and instrumented to record EMG of the cricopharyngeus, thyrohyoideus, geniohyoideus, and cricothyroideus; esophageal pressure; and motility of LES. Reflexes were activated by stimulation of the esophagus via slow balloon or rapid air distension at 1 to 16 cm distal to the UES. Slow balloon distension consistently activated EUCR and ELIR from all areas of the esophagus, but the distal esophagus was more sensitive than the proximal esophagus. Transection of SLN or proximal recurrent laryngeal nerves (RLN) blocked EUCR and ELIR generated from the cervical esophagus. Distal RLN transection blocked EUCR from the distal cervical esophagus. Slow distension of all areas of the esophagus except the most proximal few centimeters activated secondary peristalsis, and SLN transection had no effect on secondary peristalsis. Slow distension of all areas of the esophagus inconsistently activated pharyngeal swallows, and SLN transection blocked generation of pharyngeal swallows from all levels of the esophagus. Slow distension of the esophagus inconsistently activated belching, but rapid air distension consistently activated belching from all areas of the esophagus. SLN transection did not block initiation of belch but blocked one aspect of belch, i.e., inhibition of cricopharyngeus EMG. Vagotomy blocked all aspects of belch generated from all areas of esophagus and blocked all responses of all reflexes not blocked by SLN or RLN transection. In conclusion, the SLN mediates all aspects of the pharyngeal swallow, no portion of the secondary peristalsis, and the EUCR and ELIR generated from the proximal esophagus. Considering that SLN is not a motor nerve for any of these reflexes, the role of the SLN in control of these reflexes is sensory in nature only. PMID:22403790

Lang, I M; Medda, B K; Jadcherla, S; Shaker, R

2012-06-15

371

New Observations at the Slate Islands Impact Structure, Lake Superior  

NASA Technical Reports Server (NTRS)

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.

Dressler, B. O.; Sharpton, V. L.; Schnieders, B.; Scott, J.

1995-01-01

372

Superior canal dehiscence syndrome: clinical manifestations and radiologic correlations.  

PubMed

The objective of this study is to describe the superior canal dehiscence syndrome (SCDS) and its vestibule-cochlear manifestations, while analyzing dehiscence size, audiogram and vestibular-evoked myogenic potential (VEMP) changes following dehiscence obliteration. We conducted a prospective study in a tertiary referral center. All Patients diagnosed and surgically treated for SCDS were operated through a middle fossa craniotomy (MFC). Clinical and radiological data were collected. The main outcome measures were Air-bone gaps, Pure-tone average (PTA), speech discrimination scores (SDS) and VEMP thresholds and were correlated to dehiscence size. 28 patients were included in this study with a mean dehiscence size of 4.68 mm. Phonophobia and imbalance were the most debilitating cochlear and vestibular symptoms, respectively. At 2 months postoperatively, low-frequency air-bone gaps showed a statistically significant improvement (p < 0.001). SDS and PTA did not show any statistically significant changes 2 months postoperatively (p = 0.282 and p = 0.295, respectively). VEMP threshold differences between operated and contralateral ears were statistically significant preoperatively (p < 0.001) and non-significant 2 months postoperatively (p = 0.173). Dehiscence size only showed a statistically significant correlation with preoperative total cochlear symptoms, while remaining insignificant with all other variables measured. Air-bone gaps, VEMP and computerized tomography remain essential tools in diagnosing and following SCDS. Dehiscence size is an independent factor in the analysis of SCDS, with cochlear symptomatology being associated to dehiscence sizes. Finally, it is shown that overall symptomatology, audiometric results and VEMP thresholds return to normal values post-obliteration, confirming the continuing success of the MFC approach for SCDS obliteration. PMID:24162764

Saliba, Issam; Maniakas, Anastasios; Benamira, Lina Zahra; Nehme, Jade; Benoit, Mélanie; Montreuil-Jacques, Véronique

2014-11-01

373

Non-Stationarity in Multisensory Neurons in the Superior Colliculus  

PubMed Central

The superior colliculus (SC) integrates information from multiple sensory modalities to facilitate the detection and localization of salient events. The efficacy of “multisensory integration” is traditionally measured by comparing the magnitude of the response elicited by a cross-modal stimulus to the responses elicited by its modality-specific component stimuli, and because there is an element of randomness in the system, these calculations are made using response values averaged over multiple stimulus presentations in an experiment. Recent evidence suggests that multisensory integration in the SC is highly plastic and these neurons adapt to specific anomalous stimulus configurations. This raises the question whether such adaptation occurs during an experiment with traditional stimulus configurations; that is, whether the state of the neuron and its integrative principles are the same at the beginning and end of the experiment, or whether they are altered as a consequence of exposure to the testing stimuli even when they are pseudo-randomly interleaved. We find that unisensory and multisensory responses do change during an experiment, and that these changes are predictable. Responses that are initially weak tend to potentiate, responses that are initially strong tend to habituate, and the efficacy of multisensory integration waxes or wanes accordingly during the experiment as predicted by the “principle of inverse effectiveness.” These changes are presumed to reflect two competing mechanisms in the SC: potentiation reflects increases in the expectation that a stimulus will occur at a given location relative to others, and habituation reflects decreases in stimulus novelty. These findings indicate plasticity in multisensory integration that allows animals to adapt to rapidly changing environmental events while suggesting important caveats in the interpretation of experimental data: the neuron studied at the beginning of an experiment is not the same at the end of it. PMID:21772824

Perrault, Thomas J.; Stein, Barry E.; Rowland, Benjamin A.

2011-01-01

374

Coding of multisensory temporal patterns in human superior temporal sulcus  

PubMed Central

Philosophers, psychologists, and neuroscientists have long been interested in how the temporal aspects of perception are represented in the brain. In the present study, we investigated the neural basis of the temporal perception of synchrony/asynchrony for audiovisual speech stimuli using functional magnetic resonance imaging (fMRI). Subjects judged the temporal relation of (a)synchronous audiovisual speech streams, and indicated any changes in their perception of the stimuli over time. Differential hemodynamic responses for synchronous versus asynchronous stimuli were observed in the multisensory superior temporal sulcus complex (mSTS-c) and prefrontal cortex. Within mSTS-c we found adjacent regions expressing an enhanced BOLD-response to the different physical (a)synchrony conditions. These regions were further modulated by the subjects' perceptual state. By calculating the distances between the modulated regions within mSTS-c in single-subjects we demonstrate that the “auditory leading (AL)” and “visual leading (VL) areas” lie closer to “synchrony areas” than to each other. Moreover, analysis of interregional connectivity indicates a stronger functional connection between multisensory prefrontal cortex and mSTS-c during the perception of asynchrony. Taken together, these results therefore suggest the presence of distinct sub-regions within the human STS-c for the maintenance of temporal relations for audiovisual speech stimuli plus differential functional connectivity with prefrontal regions. The respective local activity in mSTS-c is dependent both upon the physical properties of the stimuli presented and upon the subjects' perception of (a)synchrony. PMID:22973202

Noesselt, Tömme; Bergmann, Daniel; Heinze, Hans-Jochen; Münte, Thomas; Spence, Charles

2012-01-01

375

Superior epigastric artery perforator flap for sternal osteomyelitis defect reconstruction.  

PubMed

Sternal osteomyelitis after median sternotomy is associated with considerable morbidity and mortality. Combined with radical debridement, muscle and less frequently omentum flaps are used to reconstruct the resulting defects. In this study, we present our experience with the fasciocutaneous superior epigastric artery perforator (SEAP) flap for defect closure. After resection of the entire sternum, including the costochondral arches and the sternoclavicular joints, the repair of the defect was performed with the perforator flap without any re-stabilisation of the thoracic wall. A consecutive series of nine patients with a mean age of 69 ± 6 years were reconstructed with the SEAP flap. The mortality rate was zero. One patient developed a mediastinal haematoma and required five re-interventions by the cardiothoracic surgeons and thereafter a revision to close a small-wound dehiscence at the tip of the flap. Another two patients developed partial necrosis of the flap that could be managed conservatively. One patient had a revision for a seroma on the donor site, resulting in a 100% closure rate of the defect; there were revisions in two out of nine patients. The underlying infection was controlled by debridement, antibiotic therapy and flap closure in all cases. The overall success of the procedure was satisfactory; however, the local complication rate was relatively high with three out of nine patients on the flap side and one of nine on the donor site. Major advantages of the perforator flap in this highly morbid patient cohort are that the operation is relatively quick, muscle tissue is spared and re-education facilitated. PMID:24560800

Wettstein, R; Weisser, M; Schaefer, D J; Kalbermatten, D F

2014-05-01

376

Actividades de verano Cursos de espaol para extranjeros (Centro Superior de Idiomas de la UA)  

E-print Network

UA) AULAS: Cursos de Francés, inglés, alemán, italiano, árabe, ruso y de preparación exámenes oficiales (IELTS, PET, FCE) (Centro Superior de Idiomas de la UA) Estancias lingüísticas en el extranjero (Centro Superior de Idiomas de la UA). AULAS Junior: inglés para niños/as de 14 a 16 años (Centro Superior

Escolano, Francisco

377

Avoiding superior tilt in reverse shoulder arthroplasty: a review of the literature and technical recommendations.  

PubMed

Superior tilt of the baseplate component in reverse total shoulder arthroplasty leads to tensile baseplate forces and may be a contributor to early loosening. The risk factors for this implant malposition include inadequate exposure through a superior approach and superior glenoid bone deficiency that obscures the native glenoid tilt. Here we review our preoperative evaluation and surgical management strategies to avoid superior tilt. Adequate exposure with a superior approach can be achieved but requires not just proper surgical technique but also careful patient selection. We propose that the superior approach be considered only for acute proximal humerus fractures or in patients when the following criteria are met: no prior open surgery on the shoulder; more than 30° of passive external rotation at 0° of abduction; no medial humeral osteophytes; and any superior migration must be reducible with a sulcus test during examination under anesthesia. Avoiding superior tilt when there is significant superior glenoid erosion can be accomplished with humeral head autograft, most easily performed through a deltopectoral approach. Preoperative templating is critical to determine proper graft thickness, inclination, reaming depth, and harvest technique. PMID:25220202

Laver, Lior; Garrigues, Grant E

2014-10-01

378

Envelope coding in the lateral superior olive. II. Characteristic delays and comparison with responses in the medial superior olive.  

PubMed

1. Spike rates of cells in the cat's lateral superior olive (LSO) depend on interaural level differences (ILDs) and envelope interaural time differences (ITDs) of amplitude-modulated tones presented to both ears. We previously proposed that these sensitivities arise from a common mechanism, which is the IE binaural interaction (Inhibited by the contralateral and Excited by the ipsilateral ear). As a further test of that proposal and to gain a better understanding of the importance of this ITD-sensitivity, responses to monaural and binaural modulation are compared here over a range of modulation frequencies. 2. At low modulation frequencies, LSO-IE cells respond maximally when the envelopes of the amplitude-modulated stimuli at the two ears are out-of-phase by a half-cycle. This phase difference changes in a systematic way, which varies from cell to cell, when modulation frequency is increased. Mean interaural phase, measured over a range of modulation frequencies, was subjected to a characteristic delay analysis. Two measures were extracted: characteristic delay, which reflects differences in conduction delay between ipsi- and contralateral pathways, and characteristic phase, which reflects their sign of interaction. Most characteristic delays were within the physiological range of ITDs. There was a small bias toward positive delays, indicating a longer conduction time for the contralateral pathway. Characteristic phases were tightly distributed approximately 0.5 cycles, consistent with the proposed IE mechanism for ITD-sensitivity. 3. Increases in the modulation frequency of binaural stimuli beyond approximately 300 Hz consistently caused a profound decrease in average spike rate, as well as a decrease in the modulation of spike rate by ITD. The upper limit of ITD-sensitivity was 800 Hz. Sensitivity to envelope ITDs therefore is limited to a much lower range of frequencies than sensitivity to ITDs in fine-structure, e.g., as found in the medial superior olive (MSO), which operates up to several kilo Hertz. 4. A small sample of high-frequency EE cells (excited by both ears) in MSO also was tested with binaural amplitude-modulated stimuli. MSO-EE cells showed weak envelope ITD-sensitivity over a limited range of modulation frequencies. Consistent with the EE interaction, characteristic phases clustered approximately 0 cycles. 5. Mean interaural phase was compared with the phase of responses to monaural modulation. The difference between the ipsilateral and contralateral phases correlated well with the phase measured binaurally, both for LSO and MSO cells. 6. Many features of LSO-IE responses were mimicked by the simplest possible computer model, consisting of subtraction and rectification of low-pass filtered envelope waveforms. Differences between model and physiological results are suggestive of a temporal limitation in the binaural interaction that creates the ITD-sensitivity. 7. These results provide additional evidence for LSO ITD-sensitivity paralleling human psychophysical results. The stimulus boundaries within which ITD-sensitivity occurs suggest that it has a limited role in free-field conditions. It is traditionally thought that, to contribute to the perceived change in spatial location of a sound source, the LSO needs to show a change in overall firing rate summed across cells. This is achieved with small ILDs, but requires large ITDs, because the latter cue is less potent in single cells and has varied effects across cells by virtue of differences in characteristic delay. PMID:8899590

Joris, P X

1996-10-01

379

Teaching tracheal intubation: Airtraq is superior to Macintosh laryngoscope  

PubMed Central

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?

2014-01-01

380

Interaural time sensitivity in medial superior olive of cat.  

PubMed

1. We studied the sensitivity of cells in the medial superior olive (MSO) of the anesthetized cat to variations in interaural phase differences (IPDs) of low-frequency tones and in interaural time differences (ITDs) of tones and broad-band noise signals. Our sample consisted of 39 cells histologically localized to the MSO. 2. All but one of the cells had characteristic frequencies less than 3 kHz, and 79% were sensitive to ITDs and IPDs. More than one-half (56%) of the cells responded to monaural stimulation of either ear, and both the binaural and monaural responses were highly phase locked. All of the cells that were sensitive to IPDs and monaurally driven by either ear responded in accord with that predicted by the coincidence model of Jeffress, as judged by comparisons of the phases at which the monaural and binaural responses occurred. The optimal IPDs were tightly clustered between 0.0 and 0.2 cycles. Most cells exhibited facilitation of the response at favorable ITDs and inhibition at unfavorable ITDs compared with the monaural responses. 3. Cells in the MSO exhibited characteristic delay, as judged by a linear relationship between the mean interaural phase and stimulating frequency. Characteristic phases were clustered near 0 indicating the most cells responded maximally when the two input tones were in phase. With the use of the binaural beat stimulus we found no differential selectivity for either the direction or speed of interaural phase changes. 4. The cells were also sensitive to ITDs of broad-band noise signals. The ITD curve in response to broad-band noise was similar to that predicted by the composite curve, which was calculated by linearly summating the tonal responses over the frequencies in the response area of the cell. Most (93%) of the peaks of the composite curves were between 0 and +400 microseconds, corresponding to locations in the contralateral sound field. Moreover, computer cross correlations of the monaural spike trains were similar to the ITD curve generated binaurally for both correlated and uncorrelated noise signals to the two ears. Thus our data suggest that the cells in the MSO behave much like cross-correlators. 5. By combining data from different animals and lcoating each cell on a standard MSO, we found evidence for a spatial map of ITDs across the anterior-posterior (A-P) axis of the MSO.(ABSTRACT TRUNCATED AT 400 WORDS) PMID:2213127

Yin, T C; Chan, J C

1990-08-01

381

Predation by Ruffe ( Gymnocephalus cernuus) on Fish Eggs in Lake Superior  

Microsoft Academic Search

Ruffe (Gymnocephalus cernuus) were introduced to North America in the Duluth, Minnesota—Superior, Wisconsin harbor, which is the westernmost point on the Laurentian Great Lakes. The species proliferated in the harbor and became the subject of research which has gradually revealed certain characteristics of the biology and population growth of the ruffe. In this study ruffe in Southwestern Lake Superior were

James Selgeby

1998-01-01

382

Seasonal Changes in Ruffe Abundance in Two Lake Superior Tributaries: Implications for Control  

Microsoft Academic Search

Since the discovery of ruffe Gymnocephalus cernuus in the St. Louis River in 1987, state, federal, and tribal management agencies have sought to slow its spread to areas outside the western end of Lake Superior. A debate over control strategies highlighted uncertainties about seasonal movements of this species between Lake Superior and its western tributaries. One strategy called for eliminating

William H. Horns; William P. Brown; Scott R. Hulse; Charles R. Bronte

2000-01-01

383

An integrated approach to assessing multiple stressors for coastal Lake Superior  

E-print Network

An integrated approach to assessing multiple stressors for coastal Lake Superior Gerald J. Niemi,1 degradation across the U.S. Great Lakes coastal region. Here we use data on breeding bird, diatom, fish.S. Lake Superior coastal zone. Sites were selected as part of a larger, stratified random design

384

Small eddies observed in Lake Superior using SAR and sea surface temperature imagery  

E-print Network

transport processes is neces- sary to predict the fate of sediment, pollutants and invasive species in LakeSmall eddies observed in Lake Superior using SAR and sea surface temperature imagery Paul Mc Communicated by Leon Boegman Keywords: Great Lakes Lake Superior Remote sensing AVHRR SAR Making use

Matsumoto, Katsumi

385

Giftedness and evidence for reproducibly superior performance: an account based on the expert performance framework  

Microsoft Academic Search

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

K. Anders Ericsson; Roy W. Roring; Kiruthiga Nandagopal

2007-01-01

386

NEW RECORDS AND RANGE EXTENSIONS FOR SEVERAL CHIRONOMID GENERA IN LAKE SUPERIOR  

EPA Science Inventory

Recent USEPA investigations of Lake Superior benthos in Minnesota, Wisconsin, and Michigan waters have resulted in the discovery of six uncommon genera of Chironomidae. Five new records of genera for Lake Superior and five significant Nearctic range extensions are reported. New r...

387

Are natural fiber composites environmentally superior to glass fiber reinforced composites?  

Microsoft Academic Search

Natural fibers are emerging as low cost, lightweight and apparently environmentally superior alternatives to glass fibers in composites. We review select comparative life cycle assessment studies of natural fiber and glass fiber composites, and identify key drivers of their relative environmental performance. Natural fiber composites are likely to be environmentally superior to glass fiber composites in most cases for the

S. V Joshi; L. T Drzal; A. K Mohanty; S Arora

2004-01-01

388

Is There a Limit to the Superiority of Individuals with ASD in Visual Search?  

ERIC Educational Resources Information Center

Superiority in visual search for individuals diagnosed with autism spectrum disorder (ASD) is a well-reported finding. We administered two visual search tasks to individuals with ASD and matched controls. One showed no difference between the groups, and one did show the expected superior performance for individuals with ASD. These results offer an…

Hessels, Roy S.; Hooge, Ignace T. C.; Snijders, Tineke M.; Kemner, Chantal

2014-01-01

389

Association fiber pathways to the frontal cortex from the superior temporal region in the rhesus monkey  

Microsoft Academic Search

The projections to the frontal cortex that originate from the various areas of the superior temporal region of the rhesus monkey were investigated with the autoradiographic technique. The results demonstrated that the rostral part of the superior temporal gyrus (areas Pro, Ts1, and Ts2) projects to the proisocortical areas of the orbital and medial frontal cortex, as well as to

M. Petrides; D. N. Pandya

1988-01-01

390

Trust Differences Between Men and Women in Superior-Subordinate Relationships  

Microsoft Academic Search

Trust perceptions of male and female respondents toward on-site supervisors, area supervisors, and top management were investigated in a large state agency. Although trust differences between men and women toward management were not found, respondents reporting to someone of the same gender had significantly higher trust in their superior than did men or women reporting to a superior of the

Dow Scott

1983-01-01

391

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

392

Nearshore Habitat and Fish Community Associations of Coaster Brook Trout in Isle Royale, Lake Superior  

Microsoft Academic Search

We characterized the nearshore habitat and fish community composition of approximately 300 km of shoreline within and adjacent to the major embayments of Isle Royale, Lake Superior. Sampling yielded 17 species, of which 12 were widespread and represented a common element of the Lake Superior fish community, including cisco Coregonus artedi, lake whitefish C. clupeaformis, round whitefish Prosopium cylindraceum, lake

Owen T. Gorman; Seth A. Moore; Andrew J. Carlson; Henry R. Quinlan

2008-01-01

393

Management Perspectives on Coaster Brook Trout Rehabilitation in the Lake Superior Basin  

Microsoft Academic Search

Coaster brook trout are a migratory form of brook trout Salvelinus fontinalis that spend part of their lives in the Great Lakes. Over the last century the abundance of coaster brook trout in Lake Superior has declined dramatically, and only remnant stocks remain. Recently, the rehabilitation of coaster brook trout in Lake Superior has become a goal of fish management

Donald R. Schreiner; Ken I. Cullis; Michael C. Donofrio; Gregory J. Fischer; Laura Hewitt; Karen G. Mumford; Dennis M. Pratt; Henry R. Quinlan; Steven J. Scott

2008-01-01

394

Superior Labral Strain during the Throwing MotionA Cadaveric Study  

Microsoft Academic Search

We studied the strain on the superior labrum of 10 fresh-frozen cadaveric shoulders with the arm in simulated positions of a pitching motion. We used linear transducers to measure the strain in both the anterior and posterior superior labrum with the arm in various planes and rotations simulating the motions of pitching: early cocking, late cocking, acceleration, deceleration, and follow-through.

Rabindra L. Pradhan; Eiji Itoi; Yuji Hatakeyama; Masakazu Urayama; Kozo Sato

2001-01-01

395

ANTHROPOGENIC COPPER INVENTORIES AND MERCURY PROFILES FROM LAKE SUPERIOR: EVIDENCE FOR MINING IMPACTS  

EPA Science Inventory

During the past 150 years, the mining indstry discharged more than a billion tons of tailings along Lake Superior shorelines and constructed numerous smelters in the watershed. Given the vast size of Lake Superior, were sediment profiles at locations far offshore impacted by near...

396

Lithospheric variations across the Superior Province, Ontario, Canada: Evidence from tomography and shear wave splitting  

Microsoft Academic Search

(1) The Superior Province of the Canadian Shield is the largest contiguous region of the Archean crust. A combination of data from multiple experiments is used to obtain shear wave splitting parameters and a three-dimensional tomographic velocity model beneath a large portion of the Superior, corresponding approximately to the province of Ontario. Shear wave splits are obtained at 24 sites

A. W. Frederiksen; S.-K. Miong; F. A. Darbyshire; D. W. Eaton; S. Rondenay; S. Sol

2007-01-01

397

Lithospheric variations across the Superior Province, Ontario, Canada: Evidence from tomography and shear wave splitting  

Microsoft Academic Search

The Superior Province of the Canadian Shield is the largest contiguous region of the Archean crust. A combination of data from multiple experiments is used to obtain shear wave splitting parameters and a three-dimensional tomographic velocity model beneath a large portion of the Superior, corresponding approximately to the province of Ontario. Shear wave splits are obtained at 24 sites across

A. W. Frederiksen; S.-K. Miong; F. A. Darbyshire; D. W. Eaton; S. Rondenay; S. Sol

2007-01-01

398

Double superior gemellus together with double piriformis and high division of the sciatic nerve  

Microsoft Academic Search

Summary We report a case with double superior gemellus and double piriformis mm. associated with the sciatic n. dividing high and passing between the two piriformis mm. in the same lower extremity. This abnormality has not previously been described in the literature. As many musculoskeletal structures may be involved in sciatica, the supernumerary superior gemelli and piriformis mm. may exert

Y. Arifoglu; H. S. Sürücü; M. F. Sargon; E. Tanyeli; F. Yazar

1997-01-01

399

Double superior gemellus together with double piriformis and high division of the sciatic nerve  

Microsoft Academic Search

We report a case with double superior gemellus and double piriformis mm. associated with the sciatic n. dividing high and passing between the two piriformis mm. in the same lower extremity. This abnormality has not previously been described in the literature. As many musculoskeletal structures may be involved in sciatica, the supernumerary superior gemelli and piriformis mm. may exert pressure

Y. Arifoglu; H. S. Sürüc; M. F. Sargon; E. Tanyeli; F. Yazar

1998-01-01

400

75 FR 76324 - Drawbridge Operation Regulation; Duluth Ship Canal, Duluth-Superior Harbor, MN  

Federal Register 2010, 2011, 2012, 2013

...area and enhance safety for all modes of transportation. DATES...alternate Superior, Wisconsin, Entry Channel, and passage of the...the reasonable balance of all modes of transportation and effectively...alternate Superior, Wisconsin, Entry Channel may be used by all...

2010-12-08

401

Abundance and Distribution of Benthic Invertebrates, with Emphasis on Diporeia, along the Keweenaw Peninsula, Lake Superior  

Microsoft Academic Search

The benthic invertebrate community in Lake Superior is an important component in the fisheries food web. Among the Great Lakes, only Lake Superior contains populations of Diporeia spp. that have not been reduced or extirpated in the last 20 years. The objectives of this study were to determine the abundance and distribution of benthic invertebrates along the Keweenaw coast, and

Nancy A. Auer; Jason E. Kahn

2004-01-01

402

A Holocene history of dune-mediated landscape change along the southeastern shore of Lake Superior  

Microsoft Academic Search

Causal links that connect Holocene high stands of Lake Superior with dune building, stream damming and diversion and reservoir impoundment and infilling are inferred from a multidisciplinary investigation of a small watershed along the SE shore of Lake Superior. Radiocarbon ages of wood fragments from in-place stumps and soil O horizons, recovered from the bottom of 300-ha Grand Sable Lake,

Walter L Loope; Timothy G Fisher; Harry M Jol; Ronald J Goble; John B Anderton; William L Blewett

2004-01-01

403

Contribution of Hatchery-Reared Fish to Chinook Salmon Populations and Sport Fisheries in Lake Superior  

Microsoft Academic Search

Chinook salmon Oncorhynchus tshawytscha stocked in Lake Superior since 1967 to diversify the sport fishery were suspected of reproducing. An abundance of naturalized chinook salmon would reduce the need for hatchery fish but also would decrease our ability to manage chinook populations and their effect on the Lake Superior fish community. Our study objective was to determine the relative contribution

James W. Peck; Thomas S. Jones; Wayne R. MacCallum; Stephen T. Schram

1999-01-01

404

General circulation of Lake Superior: Mean, variability, and trends from 1979 to 2006  

Microsoft Academic Search

Previous observations and modeling studies of Lake Superior have only partly elucidated its large-scale circulation, in terms of both the climatological state and interannual variability. We use an eddy resolving, three-dimensional hydrodynamic model to bridge this gap. We simulate Lake Superior circulation and thermal structure from 1979 to 2006 and consider the mechanisms responsible for the flow. Model results are

Val Bennington; Galen A. McKinley; Nobuaki Kimura; Chin H. Wu

2010-01-01

405

77 FR 35857 - Safety Zone, Fireworks Display, Lake Superior; Duluth, MN  

Federal Register 2010, 2011, 2012, 2013

...Fireworks Display, Lake Superior; Duluth, MN AGENCY: Coast Guard, DHS. ACTION: Temporary...safety zone on Lake Superior near Duluth, MN on July 4, 2012. This zone is intended...the vicinity of Duluth Harbor in Duluth, MN. Based on accidents that have...

2012-06-15

406

77 FR 37321 - Safety Zone, Barrel Recovery, Lake Superior; Duluth, MN  

Federal Register 2010, 2011, 2012, 2013

...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...

2012-06-21

407

77 FR 45490 - Safety Zone, Barrel Recovery, Lake Superior; Duluth, MN  

Federal Register 2010, 2011, 2012, 2013

...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...

2012-08-01

408

Mesenteric venous thrombosis treated with urokinase via the superior mesenteric artery  

Microsoft Academic Search

A 77-year-old man with a history of multiple surgically treated malignancies presented with increasing abdominal pain after eating. Computerized tomographic scan showed superior mesenteric vein and portal vein thrombosis. The patient was treated with selective superior mesenteric artery infusion of urokinase resulting in clinical improvement and near complete resolution of the mesenteric venous thrombosis. An underlying gastric malignancy was found

Poplausky; JA Kaufman; SC Geller; AC Waltman

1996-01-01

409

Geomicrobiology of Fe-rich crusts in Lake Superior sediment  

NASA Astrophysics Data System (ADS)

The limnological puzzles of Lake Superior are increasingly attracting scientists, and very little is known about the sediments and their associated microflora. The sediments are organic poor (less than 5%C) and the lake is deep oligotrophic, with water temperatures at the bottom around 3C. Previous studies reveal Fe-rich layers in the sediments at multiple loccations around the lake. The origin and mechanisms of formation of this layer remain unknown. In this study we investigated geochemical and microbiological processes that may lead to the formation of a two cm thick iron layer about 10 cm below the sediment surface. Sediment cores from two stations (EM, 230m water depth and ED, 310m water depth) in the East Basin were used. We monitored oxygen and pH depth profiles with microsensors, porewater and sediment solid matter were analyzed for nutrient and metal contents. Furthermore, phosphorus and iron sequantial extractions of sediment cores have been perfomed. The total cell count was determined using DAPI epifluoresence microscopy. DNA was extracted from the sediment samples and 16S ribosonal RNA amplicons were analyzed with denaturing gradient gel electrophoresis (DGGE). For a more in depth analysis, DNA samples from 8-10 cm and 10-12 cm were sent to the Research and Testing Lab (Texas) for pyrosequencing of 16S rRNA gene amplicons amplified using barcoded universal primers 27f-519r. The scanning electron microscope (SEM) images from the iron layer 10-12cm show filaments that were encrusted with spheres ca. 20 nm in diameter. SEM observations of thin sections also indicate the presence of very fine particles showing various morphologies. Analyses of the deposit material by SEM and energy dispersive X-ray spectroscopy (EDS) indicate that bacteria cells surfaces served as nucleation surfaces for Fe-oxide formation. EDS line-scans through bacterial cells covered with precipitates reveal phosphorus and carbon peaks at interface between cell surface and Fe-particles. The cluster analysis performed on the DGGE separation of ribosomal RNA gene fragments revealed that the two iron layers were not highly similar to each other. We obtained a total of 26,062 16S rRNA gene sequence reads from the two iron layers and the layers directly above them, which were clustered into operational taxonomic units sharing 80% similarity or more. 64-70% of these clusters could not be classified below the phylum level. While the 8-10 cm sediment layers were dominated (46.5% of reads) by relatives of Paenisporosarcina, the iron layers contained far fewer gram positive organisms, far more proteobacteria, and an a high proportion of Nitrospira species which show relatively high similarity to organisms found in an iron II rich seep.

Dittrich, M.; Monreau, L.; Quazi, S.; Raoof, B.; Chesnyuk, A.; Katsev, S.; Fulthorpe, R.

2012-04-01

410

Spontaneous Recanalization of Superior Mesenteric Artery Occlusion Following Angioplasty and Stenting of Inferior Mesenteric Artery  

SciTech Connect

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.

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

411

Archean and Proterozoic geology of the Lake Superior region, U.S.A., 1993  

USGS Publications Warehouse

This report updates a report on the Precambrian geology of the Lake Superior region published in Geological Society of America's Decade of North American Geology Volume C-2 (1993) on the Precambrianconterminous U.S.

Sims, P. K.; Carter, L. M. H.

1996-01-01

412

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

...Minnesota)-Superior (Wisconsin) Interstate Air Quality Control Region. 81.60 Section 81...CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.60 Duluth...

2014-07-01

413

Geologic Field Investigation: Investigating Coastal Features of Western Lake Superior, Inferring Possibilities of their Origins  

NSDL National Science Digital Library

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.

Davis, Paul

414

NOAA Technical Memorandum ERL GLERL-107 EARLY 20TH CENTURY LAKE SUPERIOR BASIN PRECIPITATION ESTIMATES  

E-print Network

1 NOAA Technical Memorandum ERL GLERL-107 EARLY 20TH CENTURY LAKE SUPERIOR BASIN PRECIPITATION .................................................... 7 2.4 Calculating the Basic Precipitation from the Ratios ............................................................................................................... 8 2.7 Ratio and Thiessen Precipitation Comparisons with St. Marys River Flow

415

Multisensory Information Facilitates Reaction Speed by Enlarging Activity Difference between Superior Colliculus Hemispheres in Rats  

E-print Network

Animals can make faster behavioral responses to multisensory stimuli than to unisensory stimuli. The superior colliculus (SC), which receives multiple inputs from different sensory modalities, is considered to be involved ...

Hirokawa, Junya

416

Sunrise over Lake Superior. NRRI receives U.S. EPA funding for Great Lakes  

E-print Network

Sunrise over Lake Superior. NRRI receives U.S. EPA funding for Great Lakes Restoration Initiative research. Autumn 2010 From the Director Restoring the Great Lakes Protecting plants Future environmental

Netoff, Theoden

417

Eye-opening and control of visual synapse development in the mouse superior colliculus  

E-print Network

The mammalian superior colliculus (SC) coordinates visual, somatosensory, and auditory stimuli to guide animal behavior. The superficial layers (sSC) receive visual information via two major afferent projections: 1) A ...

Phillips, Marnie A. (Marnie Ann)

2007-01-01

418

Superior Augmented Reality Registration by Integrating Landmark Tracking and Magnetic Tracking  

E-print Network

Superior Augmented Reality Registration by Integrating Landmark Tracking and Magnetic Tracking Accurate registration between real and virtual objects is crucial for augmented reality applications and Techniques]: Interaction techniques. Additional Keywords and Phrases: Augmented reality, stereo video see

State, Andrei

419

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...

420

DETECTING LEVELS OF SUSTAINABLE LAND-USE IN LAKE SUPERIOR WATERSHEDS USING STREAM INVERTEBRATE COMMUNITIES  

EPA Science Inventory

We have been investigating the relationship between watershed land-use and stream ecosystem "health" within 48 western Lake Superior watersheds, trying to identify sustainable land-use levels. Aquatic invertebrates, often useful in evaluating stream condition, were collected from...

421

Evaluating the Educational Effect of Embedded Software Training by Participants and their Superiors  

NASA Astrophysics Data System (ADS)

In continuing education, it is necessary to evaluate the knowledge and skill levels the participants attain. Additionally, it is important to know how a participant's superior evaluates the subordinates' performance in the workplace. We examined the participants' (i.e. subordinates') self-evaluations and the superiors' performance-evaluations one week and, again, four weeks after our courses for embedded software engineers. The results showed that one week after ending a course, the participants mark relatively high scores in the self-evaluation task, while the superiors' evaluations attain the same level as the participants' scores four weeks after ending the course. These results demonstrate the effectiveness of the continuing education for embedded software engineers, and suggest that the participants' self-evaluations and the superiors' performance-evaluations may consist of different evaluation feedback systems.

Yamamoto, Masaki; Saito, Hirofumi

422

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

Federal Register 2010, 2011, 2012, 2013

...the Lake Superior National Estuarine Research Reserve. On October 19, 2010, Under Secretary of Commerce for Oceans and Atmosphere Dr. Jane Lubchenco signed a record of decision pursuant to the National Environmental Policy Act and a findings of...

2010-11-04

423

Dynamics of the northern flicker hybrid zone : a test of the bounded-hybrid superiority hypothesis.  

E-print Network

??The bounded-hybrid superiority hypothesis (BHSH) predicts stable hybrid zones are characterized by hybrids having the highest fitness within the zone. The dynamic-equilibrium hypothesis (DEH) predicts… (more)

Flockhart, David Thomas Tyler

2007-01-01

424

75 FR 63086 - Drawbridge Operation Regulations; Duluth Ship Canal (Duluth-Superior Harbor).  

Federal Register 2010, 2011, 2012, 2013

...Drawbridge Operation Regulations; Duluth Ship Canal (Duluth- Superior Harbor). AGENCY...regulation governing the operation of the Duluth Ship Canal Aerial Bridge at Mile 0.1 over the Duluth Ship Canal, at Duluth, MN, for scheduled...

2010-10-14

425

The frontal eye fields target multisensory neurons in cat superior colliculus  

Microsoft Academic Search

While sensory corticotectal connections have received considerable attention, relatively little is known about the nature\\u000a of superior colliculus neurons that receive input from the cortical frontal eye fields. The present experiments used microstimulation\\u000a of indwelling electrodes in the frontal eye fields and single-unit recording in the superior colliculus to demonstrate that\\u000a frontal afferents preferentially terminate on multisensory neurons in the

M. Alex Meredith

1999-01-01

426

Static capsuloligamentous restraints to superior-inferior translation of the glenohumeral joint  

Microsoft Academic Search

The purpose of this study was to determine the contri butions of specific capsuloligamentous structures to restraining superior-inferior translation of the glenohu meral joint. Eleven cadaveric shoulders were tested using a four degrees-of-freedom test apparatus. The humerus was free to translate in three planes and free to flex and extend when a superior and inferior force of 50 N was

Jon J. P. Warner; Xiang-Hua Deng; Russell F. Warren; Peter A. Torzilli

1992-01-01

427

Superior Thyroid Artery Lesion After US-Guided Chemical Parathyroidectomy: Angiographic Diagnosis and Treatment by Embolization  

SciTech Connect

A 71-year-old woman presented with a life-threatening thyroid hemorrhage after US-guided chemical parathyroidectomy. The diagnosis was made by angiography followed by immediate embolization of a pseudoaneurysm of the left superior thyroid artery. Embolization controlled the hemorrhage, obviating the need for surgery. The patient made a full recovery with no evidence of further hemorrhage. Pseudoaneurysm of the superior thyroid artery is a rare cause of hemorrhage and percutaneous embolization is an effective method of treatment.

Perona, Franco; Barile, Antonio; Oliveri, Michele; Quadri, Piergiorgio [Department of Radiology, Ospedale S. Paolo, Via Genova 22, I-17100 Savona (Italy); Ferro, Carlo [Department of Radiology, Ospedale S. Martino, Largo Rosanna Benzi 10, I-16132 Genoa (Italy)

1999-05-15

428

An anatomic investigation of the serratus posterior superior and serratus posterior inferior muscles  

Microsoft Academic Search

In classical anatomy textbooks the serratus posterior superior muscle was said to elevate the superior four ribs, thus increasing\\u000a the AP diameter of the thorax and raising the sternum. However, electromyographic and other studies do not support its role\\u000a in respiration. In order to help resolve this controversy and provide some insight into their possible functionality, the\\u000a present study aimed

Marios Loukas; Robert G. Louis Jr; Christopher T. Wartmann; R. Shane Tubbs; Ankmalika A. Gupta; Nihal Apaydin; Robert Jordan

2008-01-01

429

The Vernacular Watercraft of Isle Royale: a western Lake Superior boatbuilding tradition  

E-print Network

THE VERNACULAR WATERCRAFT OF ISLE ROYALE: A WESTERN LAKE SUPERIOR BOATBUILDING TRADITION A Thesis by HAWK TOLSON Submitted to the Office of Graduate Studies of Texas A6M University in partial fulfillment of the requirements for 'the degree... of MASTER OF ARTS August 1992 Major Subject: Anthropology THE VERNACULAR WATERCRAFT OF ISLE ROYALE: A WESTERN LAKE SUPERIOR BOATBUILDING TRADITION A Thesis by HAWK TOLSON Approved as to style and content by: Kevi J. r sman (Chair of Committee) D...

Tolson, Hawk

2012-06-07

430

RESERVA DE PLAZA Y MATRCULA Ttulo: Curso Superior Universitario en Adaptacin del  

E-print Network

RESERVA DE PLAZA Y MATRÍCULA Título: Curso Superior Universitario en Adaptación del Método Pilates profesional. · Hoja de inscripción cumplimentada Curso Superior Universitario en Adaptación del Método Pilates Método Pilates ha demostrado su eficacia en el acondicionamiento físico del ser humano y en el abordaje

Rey Juan Carlos, Universidad

431

Low Reproductive Rates of Lake Superior Bald Eagles: Low Food Delivery Rates or Environmental Contaminants?  

Microsoft Academic Search

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

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

432

Spatial vision is superior in musicians when memory plays a role.  

PubMed

Musicians' perceptual advantage in the acoustic domain is well established. Recent studies show that musicians' verbal working memory is also superior. Additionally, some studies report that musicians' visuospatial skills are enhanced although others failed to find this enhancement. We now examined whether musicians' spatial vision is superior, and if so, whether this superiority reflects refined visual skills or a general superiority of working memory. We examined spatial frequency discrimination among musicians and nonmusician university students using two presentation conditions: simultaneous (spatial forced choice) and sequential (temporal forced choice). Musicians' performance was similar to that of nonmusicians in the simultaneous condition. However, their performance in the sequential condition was superior, suggesting an advantage only when stimuli need to be retained, i.e., working memory. Moreover, the two groups showed a different pattern of correlations: Musicians' visual thresholds were correlated, and neither was correlated with their verbal memory. By contrast, among nonmusicians, the visual thresholds were not correlated, but sequential thresholds were correlated with verbal memory scores, suggesting that a general working memory component limits their performance in this condition. We propose that musicians' superiority in spatial frequency discrimination reflects an advantage in a domain-general aspect of working memory rather than a general enhancement in spatial-visual skills. PMID:25146576

Weiss, Atalia H; Biron, Tali; Lieder, Itay; Granot, Roni Y; Ahissar, Merav

2014-01-01

433

Discrimination among spawning concentrations of Lake Superior lake herring based on trace element profiles in sagittae  

USGS Publications Warehouse

Little is known about the stock structure of lake herring Coregonus artedi in Lake Superior, and recent increases in harvestable stock sizes has led to expanded exploitation in some areas. Research on marine teleosts has demonstrated that chemical differences in sagittal otoliths can be used for identification of fish stocks. We used plasma emission spectrophotometry to measure the concentrations of 10 trace elements in the sagittal otoliths from lake herring captured at eight spawning sites in Lake Superior and from Little Star Lake, an inland lake outside the Lake Superior basin. Discriminant function analysis indicated that elemental concentrations provided site-specific information but that considerable overlap existed among some locations, especially those in western Lake Superior. Correct classification rates varied from 12.0% to 86.1% and were generally higher for spawning locations from embayments in eastern Lake Superior and for the outgroup population from Little Star Lake. The results presented here demonstrate the potential usefulness of this technique for strictly freshwater species, especially those that live in highly oligotrophic waters such as Lake Superior.

Bronte, Charles R.; Hesselberg, Robert J.; Shoesmith, John A.; Hoff, Michael H.

1996-01-01

434

An Assessment of the Environmental Effects of Dredged Material Disposal in Lake Superior. Volume 4. Dynamics of Mixing and Dispersal.  

National Technical Information Service (NTIS)

The two areas selected for study, the north coast of the Keweenaw Peninsula and the western embayment of Lake Superior near Duluth-Superior, differ greatly in their mixing and dispersal characteristics. Nearshore turbidity along the Keweenaw Peninsula con...

J. P. Keillor, J. Young, R. A. Ragotzkie

1976-01-01

435

Activitats d'estiu Cursos d'espanyol per a estrangers (Centre Superior d'Idiomes de la UA)  

E-print Network

Activitats d'estiu Idiomes Cursos d'espanyol per a estrangers (Centre Superior d'Idiomes de la UA, PET, FCE) (Centre Superior d'Idiomes de la UA) Estades lingüístiques en l'estranger (Centre Superior d'Idiomes de la UA). AULES Junior: anglès per a xiquets/as de 14 a 16 anys (Centre Superior d'Idiomes de la UA

Escolano, Francisco

436

Comparison of luteinizing hormone, leptin and progesterone levels in the systemic circulation (Vena jugularis) and near the ovarian circulation (Vena cava caudalis) during the oestrous cycle in Mangalica and Landrace gilts.  

PubMed

The objective of this study was to evaluate luteinizing hormone (LH) and luteal progesterone (P4) secretion in systemic blood and blood near the ovaries in Mangalica (M) and Landrace (L) gilts by implanting catheters into the Vena jugularis and the Vena cava caudalis via the Vena saphena, respectively. Furthermore, leptin was analyzed in jugular vein blood. Blood was collected twice daily from day 7 to day 19 of the oestrous cycle and frequently (10-min intervals for 6 h) on day 9, day 12 and day 15 in M (n=3) and L gilts (n=4). L gilts had congruent pulsatile LH secretion in both veins, but the LH concentrations in M were always below the assay sensitivity during the luteal phase. In both breeds, episodic P4 secretion was found in the jugular and caval veins, and both sampling site and breed had an influence on P4 secretion (P<0.05). The mean concentration of P4 was higher (P<0.01) in utero-ovarian blood (75.8+/-5.3 in M; 49.6+/-4.2 ng/ml in L) than in the periphery (31.3+/-2.0 in M; 21.2+/-1.8 ng/ml in L). M pigs had a lower number of corpora lutea (9.7+/-2.3 vs. 20.5+/-4.4), and analysis of the P4 secretion ratio per corpus luteum revealed an influence of breed (P<0.01). This ratio was significantly higher in M (3.8+/-0.3 and 8.7+/-0.7 ng/ml) compared with the L gilts (1.4+/-0.1 and 2.8+/-0.3 ng/ml) in the jugular and caval veins, respectively. Blood sampling from the Vena cava caudalis is potentially more precise than from the Vena jugularis for evaluation of ovarian P4 secretion. Both the higher P4 concentration and increased leptin secretion (11.3+/-0.6 vs. 3.0+/-0.1 ng/ml, P<0.05) and consequently the altered LH secretion pattern in the Mangalica may contribute to the lower fecundity of this breed. PMID:18787307

Brüssow, Klaus-Peter; Schneider, Falk; Tuchscherer, Armin; Egerszegi, Istvan; Rátky, Jozsef

2008-12-01

437

Age, Growth, Maturity, and Sex Composition of the American Smelt, Osmerus mordax (Mitchill), of Western Lake Superior  

Microsoft Academic Search

This study is based on 4,561 smelt collected in Chequamegon Bay, the Apostle Islands, the Brule River, and Superior Harbor, all in western Lake Superior. Commercial production in the Great Lakes (U. S. and Canada combined) reached a peak of nearly 16 million pounds in 1960. Production in Lake Superior has generally been small but increased during the 1950's to

Merryll M. Bailey

1964-01-01

438

Trophic connections in Lake Superior Part II: the nearshore fish community  

USGS Publications Warehouse

We use detailed diet analyses of the predominant planktivorous, benthivorous and piscivorous fish species from Lake Superior to create a nearshore (bathymetric depths Mysis diluviana and Diporeia spp). Although the piscivorous fishes like lean lake trout (Salvelinus namaycush) fed to a lesser extent on Diporeia and Mysis, they were still strongly connected to these macroinvertebrates, which were consumed by their primary prey species (sculpin spp., rainbow smelt Osmerus mordax, and coregonines). The addition of Bythotrephes to summer/fall cisco and lake whitefish diets, and the decrease in rainbow smelt in lean lake trout diets (replaced by coregonines) were the largest observed differences relative to historic Lake Superior diet studies. Although the offshore food web of Lake Superior was simpler than nearshore in terms of number of fish species present, the two areas had remarkably similar food web structures, and both fish communities were primarily supported by Mysis and Diporeia. We conclude that declines in Mysis or Diporeia populations would have a significant impact on energy flow in Lake Superior. The food web information we generated can be used to better identify management strategies for Lake Superior.

Gamble, A.E.; Hrabik, T.R.; Yule, D.L.; Stockwell, J.D.

2011-01-01

439

Effects of biceps tension and superior humeral head translation on the glenoid labrum.  

PubMed

We sought to understand the effects of superior humeral head translation and load of the long head of biceps on the pathomechanics of the superior glenoid labrum by predicting labral strain. Using micro-CT cadaver images, a finite element model of the glenohumeral joint was generated, consisting of humerus, glenoid bone, cartilages, labrum, and biceps tendon. A glenohumeral compression of 50?N and biceps tensions of 0, 22, 55, and 88?N were applied. The humeral head was superiorly translated from 0 to 5?mm in 1-mm increments. The highest labral strain occurred at the interface with the glenoid cartilage and bone beneath the origin of the biceps tendon. The maximum strain was lower than the reported failure strain. The humeral head motion had relatively greater effect than biceps tension on the increasing labral strain. This supports the mechanistic hypothesis that superior labral lesions result mainly from superior migration of the humeral head, but also from biceps tension. © 2014 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 32:1424-1429, 2014. PMID:25070392

Hwang, Eunjoo; Carpenter, James E; Hughes, Richard E; Palmer, Mark L

2014-11-01

440

Sources of Heavy Metal Pollution into the St. Louis River, Lake Superior Watershed  

NASA Astrophysics Data System (ADS)

The St. Louis River begins in Hoyt Lakes, Minnesota and enters Lake Superior between Duluth, Minnesota and Superior, Wisconsin. The Partridge River and the Embarrass River are two of its main tributaries. National Pollutant Discharge Elimination System (NPDES) permits are issued for surface water dischargers under the Clean Water Act. The Permit Compliance System (PCS) and the Integrated Compliance Information System (ICIS) is a tool allowing public access to information contained in NPDES permits. Along the way to Lake Superior, 19 facilities list the St. Louis River, St. Louis Bay, part of the St. Louis River estuary, or one of its tributaries as a receiving water. Of these 19 locations, four report discharging heavy metals into the receiving water. Copper and Lead are the metals most frequently discharged.

Sternberg, S. P.; Palokangas, C.

2013-12-01

441

Social vigilantism: measuring individual differences in belief superiority and resistance to persuasion.  

PubMed

Social vigilantism (SV) is an enduring individual difference that assesses the tendency of individuals to impress and propagate their "superior" beliefs onto others to correct others' more "ignorant" opinions. After establishing a reliable measure of SV, three studies showed that SV was associated with greater expressions of belief superiority (whether reacting to others holding dissimilar or similar beliefs) and greater resistance to persuasion (via increased rates of counterarguing and greater attitude stability after persuasion appeals) even after controlling for relevant individual differences (narcissism, dogmatism, psychological reactance, and need for cognition), as well as attitude importance and extremity. Thus, SV predicts expressions of belief superiority and resistance to persuasion above and beyond characteristics of the attitude and individual difference variables previously studied in the attitude literature. SV is a meaningful construct in increasing the understanding of persuasion, attitude resistance, and attitude dissemination that can be applied in a variety of psychological domains. PMID:19776422

Saucier, Donald A; Webster, Russell J

2010-01-01

442

Enhanced anger superiority effect in generalized anxiety disorder and panic disorder.  

PubMed

People are typically faster and more accurate to detect angry compared to happy faces, which is known as the anger superiority effect. Many cognitive models of anxiety suggest anxiety disorders involve attentional biases towards threat, although the nature of these biases remains unclear. The present study used a Face-in-the-Crowd task to investigate the anger superiority effect in a control group and patients diagnosed with either generalized anxiety disorder (GAD) or panic disorder (PD). The main finding was that both anxiety groups showed an enhanced anger superiority effect compared to controls, which is consistent with key theories of anxiety. Furthermore, both anxiety groups showed a differential pattern of enhanced bias towards threat depending on the crowd in the displays. The different attentional bias patterns between the GAD and PD groups may be related to the diverse symptoms in these disorders. These findings have implications for the diagnosis and treatment of anxiety. PMID:22196167

Ashwin, Chris; Holas, Pawel; Broadhurst, Shanna; Kokoszka, Andrzej; Georgiou, George A; Fox, Elaine

2012-03-01

443

In search of "master mindreaders": are psychics superior in reading the language of the eyes?  

PubMed

Much of the effort to understand the brain substrate of theory of mind and empathy has involved the study of individuals with deficits in that domain, such as those on the autism spectrum. Studying individuals with presumed superior abilities in picking up social signals may yield important additional information. We predicted that psychic readers may have superior abilities and tested this by contrasting a group of 22 professional psychic readers with matched controls on a measure of theory of mind ("Reading the Mind in the Eyes" test) and a multidimensional measure of empathy [Interpersonal Reactivity Index (IRI)]. Although psychic readers were not superior in reading the language of the eyes, they were shown to have more cognitive empathy, as measured with the "Fantasy" subscale of the IRI. We discuss the merits of research involving "experts" in social cognition and propose other possible groups of "master mindreaders." PMID:15919556

Dziobek, Isabel; Rogers, Kimberley; Fleck, Stefan; Hassenstab, Jason; Gold, Stefan; Wolf, Oliver T; Convit, Antonio

2005-07-01

444

Diagnosis and management of superior labral anterior posterior tears in throwing athletes.  

PubMed

Injury to the superior glenoid labrum is increasingly recognized as a significant source of shoulder pain and dysfunction in the throwing athlete. Several theories have been proposed to explain the pathogenesis of superior labral anterior posterior (SLAP) tears. The clinical examination of the superior labrum-biceps tendon complex remains challenging because of a high association of other shoulder injuries in overhead athletes. Many physical examination findings have high sensitivity and low specificity. Advances in soft tissue imaging such as magnetic resonance arthrography allow for improved detection of labrum and biceps tendon lesions, although correlation with history and physical examination is critical to identify symptomatic lesions. Proper treatment of throwers with SLAP tears requires a thorough understanding of the altered biomechanics and the indications for nonoperative management and arthroscopic treatment of these lesions. PMID:23172004

Knesek, Michael; Skendzel, Jack G; Dines, Joshua S; Altchek, David W; Allen, Answorth A; Bedi, Asheesh

2013-02-01

445

Inferior retinal light exposure is more effective than superior retinal exposure in suppressing melatonin in humans  

NASA Technical Reports Server (NTRS)

Illumination of different areas of the human retina elicits differences in acute light-induced suppression of melatonin. The aim of this study was to compare changes in plasma melatonin levels when light exposures of equal illuminance and equal photon dose were administered to superior, inferior, and full retinal fields. Nine healthy subjects participated in the study. Plexiglass eye shields were modified to permit selective exposure of the superior and inferior halves of the retinas of each subject. The Humphrey Visual Field Analyzer was used both to confirm intact full visual fields and to quantify exposure of upper and lower visual fields. On study nights, eyes were dilated, and subjects were exposed to patternless white light for 90 min between 0200 and 0330 under five conditions: (1) full retinal exposure at 200 lux, (2) full retinal exposure at 100 lux, (3) inferior retinal exposure at 200 lux, (4) superior retinal exposure at 200 lux, and (5) a dark-exposed control. Plasma melatonin levels were determined by radioimmunoassay. ANOVA demonstrated a significant effect of exposure condition (F = 5.91, p < 0.005). Post hoc Fisher PLSD tests showed significant (p < 0.05) melatonin suppression of both full retinal exposures as well as the inferior retinal exposure; however, superior retinal exposure was significantly less effective in suppressing melatonin. Furthermore, suppression with superior retinal exposure was not significantly different from that of the dark control condition. The results indicate that the inferior retina contributes more to the light-induced suppression of melatonin than the superior retina at the photon dosages tested in this study. Findings suggest a greater sensitivity or denser distribution of photoreceptors in the inferior retina are involved in light detection for the retinohypothalamic tract of humans.

Glickman, Gena; Hanifin, John P.; Rollag, Mark D.; Wang, Jenny; Cooper, Howard; Brainard, George C.

2003-01-01

446

Association fiber pathways to the frontal cortex from the superior temporal region in the rhesus monkey  

SciTech Connect

The projections to the frontal cortex that originate from the various areas of the superior temporal region of the rhesus monkey were investigated with the autoradiographic technique. The results demonstrated that the rostral part of the superior temporal gyrus (areas Pro, Ts1, and Ts2) projects to the proisocortical areas of the orbital and medial frontal cortex, as well as to the nearby orbital areas 13, 12, and 11, and to medial areas 9, 10, and 14. These fibers travel to the frontal lobe as part of the uncinate fascicle. The middle part of the superior temporal gyrus (areas Ts3 and paAlt) projects predominantly to the lateral frontal cortex (areas 12, upper 46, and 9) and to the dorsal aspect of the medial frontal lobe (areas 9 and 10). Only a small number of these fibers terminated within the orbitofrontal cortex. The temporofrontal fibers originating from the middle part of the superior temporal gyrus occupy the lower portion of the extreme capsule and lie just dorsal to the fibers of the uncinate fascicle. The posterior part of the superior temporal gyrus projects to the lateral frontal cortex (area 46, dorsal area 8, and the rostralmost part of dorsal area 6). Some of the fibers from the posterior superior temporal gyrus run initially through the extreme capsule and then cross the claustrum as they ascend to enter the external capsule before continuing their course to the frontal lobe. A larger group of fibers curves round the caudalmost Sylvian fissure and travels to the frontal cortex occupying a position just above and medial to the upper branch of the circular sulcus. This latter pathway constitutes a part of the classically described arcuate fasciculus.

Petrides, M.; Pandya, D.N.

1988-07-01

447

Predation by ruffe (Gymnocephalus cernuus) on fish eggs in Lake Superior  

USGS Publications Warehouse

Ruffe (Gymnocephalus cernuus) were introduced to North America in the Duluth, Minnesota--Superior, Wisconsin harbor, which is the westernmost point on the Laurentian Great Lakes. The species proliferated in the harbor and became the subject of research which has gradually revealed certain characteristics of the biology and population growth of the ruffe. In this study, ruffe in Southwestern Lake Superior were found to have eaten benthic organisms and eggs of lake herring (Coregonus artedii). Overwinter predation by ruffe on eggs of lake herring and of other fall spawning Great Lakes fishes might pose a substantial new source of overwinter mortality.

Selgeby, James

1998-01-01

448

Bounded hybrid superiority in an avian hybrid zone: effects of mate, diet, and habitat choice.  

PubMed

There has been considerable debate in the study of hybrid zones as to whether hybrids may be superior to parental types within the area of contact (bounded hybrid superiority). In birds, naturally occurring hybridization is relatively common, and hybridization within this group always involves mate choice. If hybrids are superior, females choosing heterospecific mates should be expected to show higher fitness under the conditions prevalent in the hybrid zone. Hybrid superiority under these circumstances would reduce reinforcement and thereby help to maintain the hybrid zone. To examine this issue, we studied reproductive performances of hybrids and parental species of gulls (Larus occidentalis and Larus glaucescens) at two colonies within a linear hybrid zone along the west coast of the United States. This hybrid zone contains predominantly gulls of intermediate phenotype. Previous studies indicated that hybrids were superior to one or both parental types, but provided no data on possible mechanisms that underlie this hybrid superiority. Using a hybrid index designed specifically for these species, we identified to phenotype more than 300 individuals associated with nests, including both individual males and females within 73 pairs in the central portion of the hybrid zone and 74 pairs in the northern portion of the hybrid zone. There was little evidence of assortative mating, and what little there was resulted solely because of pairings within intergrades. In the central hybrid zone, females paired with hybrid males produced larger clutches and hatched and fledged more chicks compared with females paired to western gull males. This was a result of heavy predation on eggs in sand habitat, where male western gulls established territories. In contrast, many hybrid males established territories in vegetated cover that was less vulnerable to predation. In the northern part of the hybrid zone, clutch size did not differ among pair categories, however, there were differences in hatching and fledging success, with females paired to hybrid males showing better success compared to females paired to glaucous-winged gull males. Hybrids showed better hatching and fledging success in the north because hybrids are more like western gulls than glaucous-winged gulls in foraging behavior, taking a higher percentage of fish in their diet, which enhances chick growth and survival. This is believed to be the first documentation of bounded hybrid superiority that delineates the mechanisms that underlie hybrid superiority. PMID:11108604

Good, T P; Ellis, J C; Annett, C A; Pierotti, R

2000-10-01

449

Superior Mesenteric Artery Pseudoaneurysm Associated with Celiac Axis Occlusion Treated Using Endovascular Techniques  

SciTech Connect

The case of a 30-year-old woman with a post-traumatic pseudoaneurysm of the superior mesenteric artery and associated celiac axis occlusion is presented. The patient was successfully treated with celiac artery recanalization and placement of a covered stent within the superior mesenteric artery. Follow-up at 3, 6, and 12 months and 3 years demonstrated patency of the covered stent and continued exclusion of the aneurysm. Although the long-term success of this procedure is unknown this management option should be considered where facilities are available, to reduce the increased morbidity associated with open surgical procedure.