Search Results
Results 251 - 300 of 1036
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Johnston Kelly D - - 2007
OBJECT: The purpose of this human cadaver study was to determine whether or not an intraosseous skull infusion would access the superior sagittal sinus (SSS) via intradural venous channels. The diploic space of the skull bone contains a sinusoidal vascular network that communicates with the underlying dura mater. Diploic veins ...
Lin Fu-Jung - - 2007
How arterial and venous fates are established is largely unknown. In the past, circulatory dynamics were thought to be the exclusive cause of arteries and veins being structurally and functionally distinct; however, growing evidence indicates that an orderly progression of molecular signals controls arterial-venous specification in the developing vertebrate vascular ...
Neglén Peter - - 2007
Iliac venous outflow obstruction has an important role in the expression of symptomatic chronic venous insufficiency. This anatomic obstruction is frequently overlooked, owing in part to diagnostic difficulty. The combination of venous obstruction and reflux leads to more severe clinical disease. Current diagnostic modalities do not allow an definitive assessment ...
Biuckians Andre - - 2007
Systemic anticoagulation with heparin or its unfractionated derivatives followed by warfarin therapy has been the mainstay of treatment in patients with lower extremity deep venous thrombosis (DVT). Although heparin is an effective treatment modality in preventing thrombus propagation, it provides minimal therapeutic effect in dissolving preexisting venous thrombus. The clinical ...
Elias Steve - - 2007
Recent advances in catheter-based endovenous interventions have broadened our understanding in the pathophysiology and therapeutic strategies of chronic venous insufficiency, a condition that can be caused by abnormality of various lower extremity venous structures, including superficial or deep vein reflux or incompetent perforating veins. This article reviews the history and ...
Tian Lijie - - 2007
PURPOSE: To report a new method of replanting completely amputated thumbs with venous arterialization. METHODS: In 6 replantation surgeries of completely amputated thumbs performed during the period 1999-2003, the proximal artery was anastomosed with a vein of the amputated part to establish inflow and the proximal vein was anastomosed with ...
Hosein Riad B M - - 2007
Thoracic venous aneurysms are extremely rare conditions. Only 14 innominate venous aneurysms have been reported in the literature. We report a case of a 13-year-old girl who presented with a mediastinal mass on chest roentgenogram, which was performed because the patient was postoperatively tachypneic after a routine appendectomy. Further investigations ...
Malatesha G - - 2007
OBJECTIVE: To determine the agreement between arterial and venous samples in a pathologically diverse patient population presenting at an emergency department (ED) with a view to obviating the need for arterial blood gas (ABG) analysis in initial ED evaluation. METHODS: Prospective study of 95 patients (69 males, 26 females, mean ...
Aleksic Ivan - - 2007
BACKGROUND: Venous complications of implantable cardioverter defibrillator (ICD) systems may cause significant problems when the need for system revision or upgrades arises. Such revisions require venous access close to the site of the previous ICD implantation. The internal and external jugular vein have disadvantages due to a long subcutaneous course ...
Lau Jeshen H G - - 2007
Endocrine venous sampling plays a specific role in the diagnosis of endocrine disorders. In this article, we cover inferior petrosal sinus sampling, selective parathyroid venous sampling, hepatic venous sampling with arterial stimulation, adrenal venous sampling, and ovarian venous sampling. We review their indications and the scientific evidence justifying these indications ...
Seki Yukio - - 2007
A 33-year-old man presented with consciousness disturbance (Glasgow Coma Scale score 7) and right hemiplegia after suffering headache persisting for 10 days. Head computed tomography revealed an irregular intracerebral hematoma in the left temporoparietal region, associated with a tubular high density area compatible with a thrombosed transcerebral vein in the ...
Prandoni P - - 2007
After the initial demonstration provided 4 years ago by a case-control study in the New England Journal of Medicine, numerous investigations have addressed the association between venous and arterial thrombotic disorders. According to the results of recent studies, the two conditions are likely to share common risk factors, including age, ...
Thorisson Hjalti M - - 2007
Chronic venous insufficiency (CVI) is an exceedingly common and underdiagnosed disorder with a wide range of symptoms and prognosis ranging from cosmetic issues to skin ulceration with tissue loss. Ultrasound plays a pivotal role in the diagnosis, classification, and guidance of percutaneous treatment of CVI. It is therefore of critical ...
Prakash, Shawn
Arterial base deficit is used in assessing trauma patient oxygen debt, life saving intervention requirements, resuscitation adequacy, and mortality risk. Venous blood samples are simpler and less painful to obtain than arterial samples. Theoretically, venous base deficit values might substitute for arterial values. Methods: 8 anesthetized, ventilated dogs were hemorrhaged ...
Bergan John - - 2007
Chronic venous disease (CVD) is common. Its manifestations include varicose veins; skin changes such as dermatitis, hyperpigmentation, and lipodermatosclerosis; and chronic leg ulcers. Recent advances in the understanding of its pathophysiology have shown how molecular mechanisms in the inflammatory cascade are involved in these diverse findings. Venous hypertension and associated ...
Sam R C - - 2007
OBJECTIVES: This group has previously reported that UK Asians are significantly less likely to undergo surgery for lower limb venous disease than age and sex matched Caucasians. The aim of the present study was to estimate the prevalence of lower limb chronic venous disease (CVD) in the UK Asian male ...
Christodoulou C - - 2007
The antiphospholipid (Hughes) syndrome (APS) is characterized by recurrent arterial or venous thromboembolism, or pregnancy loss, in association with antiphospholipid antibodies. These antibodies may be associated with premature or accelerated atherosclerosis and emerging evidence supports the concept of a vasculopathy in the APS that may lead to arterial stenotic lesions, ...
Slavin Richard E - - 2007
The authors review 20 cases of segmental arterial mediolysis (SAM) including 3 newly reported cases. SAM developed in areas of vascular distention in 2 of the latter cases: 1 in utero in the heart of a recipient of a twin transfusion syndrome and the other in the jejunum secondary to ...
Rathbun Suman W - - 2007
Chronic venous insufficiency (CVI) results from venous hypertension secondary to superficial or deep venous valvular reflux. Treatment modalities are aimed at reducing venous valvular reflux, thereby inhibiting the ensuing pathologic inflammatory process. Compression therapy using pumps, bandaging, and/or graded compression stockings is the mainstay of treatment for CVI. Compression therapy ...
Gatt Alex - - 2007
It has been recognized, since the first description of the disease, that arterial and venous thrombosis are common in patients with homocysteinuria. Interest in the condition increased with reports from a large number of mainly retrospective studies showing that mildly elevated homocysteine levels are also associated with venous thromboembolism (VTE), ...
Corno Antonio F - - 2007
In recent years substantial progress occurred in the techniques of cardiopulmonary bypass, but the factor potentially limiting the flexibility of cardiopulmonary bypass remains the drainage of the systemic venous return. In the daily clinical practice of cardiac surgery, the amount of systemic venous return on cardiopulmonary bypass is directly correlated ...
Jamal S - - 2007
Protein Losing Enteropathy (PLE) is a syndrome associated with several diseases affecting the gastrointestinal system. Recent comprehensive reviews can be found in eMedicine and Gastroenterology. Treatment by surgery, lympho-venous anastomosis, excision of lymphangiectatic small bowel and gastrectomy and transplantation of the small intestine, depending upon the cause, have all been ...
Peden Eric - - 2007
Chronic venous insufficiency continues to be a major source of disability and cost, with accompanying socio-economic burdens. Incompetent perforator veins play a significant role in chronic venous insufficiency. This article describes the technique of radiofrequency ablation of incompetent perforating veins for patients with chronic venous insufficiency. Patient evaluation, the evolution ...
Rennie M Y - - 2007
This study evaluates microcomputed tomography (micro-CT) as a method to obtain quantitative three-dimensional (3D) information on the arterial and venous vasculature of the mouse placenta. Surface renderings at embryonic days (E) 13.5, 15.5, and 18.5 (full term) revealed that the arterial and venous vasculature branched within the chorionic plate whereas ...
Delis Konstantinos T - - 2007
Klippel-Trenaunay syndrome (KTS) is a complex congenital anomaly featuring two or more of the following: (1) capillary malformations (port-wine stains), (2) soft tissue or bony hypertrophy (or both), and (3) varicose veins or venous malformations. With the purpose of determining the actual significance of venous impairment in patients with KTS, ...
Koshima Isao - - 2008
Reconstructive microsurgery is now in a new stage of supermicrosurgery. With this technique, very tiny (0.3mm) vascular anastomoses are possible. In this paper, we describe two cases of successful fingertip replantations employing arteriole (terminal branch of digital artery) anastomoses, the arteriole graft being obtained from the same fingertip defect, reverse ...
Sukop A - - 2007
The arterial system of fingers is anatomically well described, and so, usually no difficulties arise during its preparation and the making of anastomoses in replantation surgery. Difficulties may occur, however, during manipulation in the dorsal vascular bed of fingers, known only as a random venous network. There are minimal references ...
Sutaria R - - 2007
OBJECTIVE: The correlation between ovarian venous insufficiency and lower limb venous insufficiency remains poorly understood. Clinically, incompetent ovarian veins in association with lower extremity varicose veins are suspected when leg varicose veins are found in atypical distributions. Such distributions include upper lateral or posterior thigh, on the buttocks, crossing the ...
Zhang Honglei - - 2007
A curved urethane rf-welded leg wrap with multi-compartment inflation was developed for optimal thigh compression to suppress venous enhancement during peripheral magnetic resonance angiography (MRA). In 49 patients with suspected peripheral vascular disease, bilateral thigh leg wraps were inflated to 60 mm Hg just prior to mask imaging of 3D ...
Christenson J T - - 2007
OBJECTIVES: Popliteal venous aneurysms (PVA) are rare, but represent a significant potential source of thromboembolus. Most often the patients present with pulmonary embolism, which can also be detected in patients presenting with chronic venous insufficiency. METHODS: Three patients without any clinical evidence of pulmonary emboli were diagnosed by venous duplex ...
Gülşen Salih - - 2007
Venous angiomas were found to be the most common cerebral vascular malformations, composing 63% of such lesions in two autopsy series. Annual bleeding risk associated with venous angiomas is about 0.22 % per year. Venous angiomas are generally silent lesions because of their dynamic features, and are low flow and ...
Qaseem Amir - - 2007
This guideline summarizes the current approaches for the diagnosis of venous thromboembolism. The importance of early diagnosis to prevent mortality and morbidity associated with venous thromboembolism cannot be overstressed. This field is highly dynamic, however, and new evidence is emerging periodically that may change the recommendations. The purpose of this ...
Mills Tracey A TA Division of Human Development, The University of Manchester, Manchester, UK. - - 2007
To determine whether delivery mode influences placental chorionic plate arterial and venous vascular reactivity. Normal term placentas were obtained after vaginal delivery or cesarean section. Chorionic plate arterial and venous function was assessed by wire myography. Sodium nitroprusside-induced arterial relaxation increased post cesarean section at 20% oxygen. Decreased U46619-induced venous ...
Bahadir Zeki Z Department of Kinesiology, Louisiana State University, Baton Rouge, LA, USA. - - 2007
Previous research indicates that venous emptying serves as a stimulus for vasodilation in the human forearm. This suggests the importance of recognizing the potential influence of venous volume on reactive hyperemic blood flow (RHBF) following occlusion. The purpose of this study was to examine the influence of venous emptying on ...
Tran Phuong T PT From the Department of Ophthalmology, University of Texas Southwestern Medical Center, - - 2007
To describe an uncommon presentation and course of progressive outer retinal necrosis. A 36-year-old man presented with unilateral optic disk edema with enhancement of the optic nerve sheath shown by magnetic resonance imaging. Intravenous methylprednisolone treatment was initiated. Two days later, he developed multiple discrete areas of outer retinal opacification ...
Albisetti Manuela - - 2007
AIMS: To evaluate the prevalence of congenital prothrombotic disorders in children with peripheral venous and arterial thromboses. METHODS: Deficiencies in antithrombin (AT), proteins C (PC) and S (PS), and increased lipoprotein (a), and the presence of factor V (FV) G1691A, prothrombin G20210A and methylenetetrahydrofolate reductase (MTHFR) mutations were investigated. RESULTS: ...
Ak Ahmet - - 2006
Arterial blood gas (ABG) analysis has an important role in the clinical assessment of patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). However, arterial puncture or insertion of an arterial catheter has many drawbacks. The aim of this study was to evaluate whether venous blood gas (VBG) values ...
Yap Lok H - - 2006
BACKGROUND: The anastomotic coupling device (ACD) is currently used for microsurgical venous anastomoses as an alternative to sutures and can reduce anastomotic time. METHODS: We reviewed the microsurgical procedures performed at the University of Texas M. D. Anderson Cancer Center over a 40-month period. Procedures were performed for elective reconstruction ...
Nishibe T - - 2006
AIM: The role of air plethysmography (APG) in the diagnosis of chronic venous insufficiency has not been well established. The purpose of this study was to elucidate the relationship between APG parameters and clinical severity in patients with chronic venous insufficiency. METHODS: Two hundred and ninety-four limbs in 154 patients ...
Kalimuthu Ramasamy - - 2006
Since the first successful replantation of a human thumb reported by Komatsu and Tamai in 1968, thousands of severed digits and body parts have been successfully salvaged. Restoration of anatomic form and function are the goals of replantation after traumatic tissue amputation. Regardless of anatomic location, methods include microsurgical replantation ...
Takami Toshihiro, Ohata Kenji, ...
The histological features of arterialized medullary vein (MV) in spinal dural arteriovenous fistulas (SDAVF) were studied in five consecutive patients who presented with progressive congestive myelopathy. Retrograde venous filling on preoperative angiography was recognized as being severe in 3 cases and moderate in 2 cases. Direct intradural interruption of the ...
Misević Tonci - - 2006
Duplex sonography was used to assess functional features of arteriovenous fistula (AVF) for hemodialysis (HD). Internal diameter (ID), resistance index (RI) and blood flow (BF) velocity in feeding artery and in vein ofAVF, and venous BF volume were analyzed with purpose to determine the normal values. Presumed normal BF velocities ...
Iabichella M L - - 2006
The microcirculatory evaluation in patients affected by arteriopathic or venous ulcers is usually carried out using laser Doppler flowmetry, transcutaneous oxygen (transcutaneous pressure of oxygen, TcPO(2)), and carbon dioxide (transcutaneous pressure of carbon dioxide, TcPCO(2)) measurements and capillaroscopy. These techniques provide significant pathophysiologic and prognostic information. TcPO(2) and TcPCO(2) diagnose ...
Franch Rafaella - - 2006
The existence of specific differentiation markers for arterial smooth muscle (SM) cells is still a matter of debate. A clone named MM1 was isolated from a library of monoclonal antibodies to adult porcine aorta, which in vivo binds to arterial but not venous SM cells, except for the pulmonary vein. ...
Le Guyader Alexandre - - 2006
Distal venous drainage during extracorporeal membrane oxygenation (ECMO) via femoral cannulation is described. It was performed to relieve distal venous congestion due to obstruction by the venous cannula. Venous drainage was performed with an 11 Fr introducer catheter connected as a T to the main venous line. Its effectiveness was ...
Kopp R - - 2006
Long term results of four different operative procedures for the treatment of popliteal artery aneurysms were investigated either performed by short venous or segmental alloplastic interpositions or long femoro-popliteal below the knee bypass using alloplastic grafts or autologous vein. 47 patients treated for 50 popliteal aneurysms (mean diameter +/- SD: ...
Schubert Heinrich M - - 2006
The interrupted suture technique is most commonly used for microsurgical venous anastomosis. Needle-stitch trauma and intraluminal suture, however, potentially cause vascular wall damage, thrombosis, intimal hyperplasia or even stenosis. Therefore, the present study aimed to show the feasibility and reliability of a modified cuff technique (bipolar anastomosis technique (BAT)) for ...
Chung C-P - - 2006
BACKGROUND: The mechanism of transient global amnesia (TGA) is not clear. Attempting to support the hypothesis that retrograde venous hypertension causing cerebral venous ischemia plays a role in the pathogenesis of TGA, the authors used cranial three-dimensional time-of-flight (TOF) MR angiography (MRA) to detect a possible intracranial retrograde venous flow ...
Caggiati A - - 2006
It is commonly believed that valves are absent in veins smaller than two millimetres in diameter. Consequently, current investigations on the pathophysiology of chronic venous disease (CVD) consider and evaluate only the valvular competence of large veins. The authors review literature from their own collections as well as from medical ...
van der Linden Joke - - 2006
BACKGROUND: The success of a newly created arteriovenous fistula (AVF) depends on sufficient maturation of the forearm vein used. This maturation fails in up to 50%. We hypothesize that impairment of forearm venous distensibility, ie, the ability of veins to adjust to increased pressure, is related to AVF failure. METHODS: ...
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