Search Results
Results 401 - 450 of 1017
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Doepp F - - 2001
Removal of the internal jugular vein (IJV) in unilateral radical neck dissection (rND) necessitates redirection of cerebrovenous blood to collateral pathways. If adaptation is insufficient, neurologic sequelae develop that are due to impaired venous drainage and increased intracranial pressure. The authors studied venous hemodynamic effects of unilateral rND using Doppler ...
Aharinejad S - - 2001
OBJECTIVE: Class 6 chronic venous stasis is associated with abnormal venous hemodynamics and ulceration. Ulcers primarily occur over bones and tendon prominences but very rarely over muscular compartments. We hypothesized that the anatomical distribution of venous stasis ulcers in the lower extremity is related to a lower density of venous ...
Lawson N D - - 2001
Recent evidence indicates that acquisition of artery or vein identity during vascular development is governed, in part, by genetic mechanisms. The artery-specific expression of a number of Notch signaling genes in mouse and zebrafish suggests that this pathway may play a role in arterial-venous cell fate determination during vascular development. ...
Brew S - - 2001
Summary: The vein of Galen aneurysmal malformation (VGAM) is a high flow arteriovenous shunt at the choroidal level. In the neonatal period, it typically presents with cardiac failure. Venous stenoses, occlusions and anomalies are often present. In the absence of adequate venous outflow pathways, severe, irreversible cerebral parenchymal damage may ...
Kelly A M - - 2001
OBJECTIVE: This study aims to determine the extent of correlation of arterial and venous pH with a view to identifying whether venous samples can be used as an alternative to arterial values in the clinical management of selected patients in the emergency department. METHODS: This prospective study of patients who ...
Engelke C - - 2001
Approximately 14%-20% of patients with critical lower limb ischemia are unsuited for distal arterial reconstruction and face major distal amputation. Distal venous arterialization is a unique procedure in which the venous bed is used as an alternative conduit for perfusion of peripheral tissues. Eighteen patients with stage IV Fontaine critical ...
Schultz-Ehrenburg U - - 2001
The paper presents recent advances in photoplethysmography (PPG) and the role played by PPG in the noninvasive diagnostics of venous and arterial disease. The technical principles of the new self-calibrating photoplethysmographs are explained. These units allow a quantitative evaluation of all measurement data (e.g. time values, amplitudes, flow rates, blood ...
Rentsch K M - - 2001
BACKGROUND: In Switzerland, medical prescription of heroin (diacetylmorphine) is currently being evaluated as a treatment option for heavily dependent addicts. Therefore the diacetylmorphine pharmacokinetics in opioid-addicted patients was studied. METHODS: Three different diacetylmorphine doses (up to 210 mg) and 20 mg deuterium-labeled morphine (morphine-d3) were administered intravenously to 8 heroin-addicted ...
Talbi M - - 2001
The authors present a case of successful replantation of a totally avulsed ear in a 37-year-old patient, using a termino-terminal arterial anastomosis on the superficial temporal artery. As no suitable vein could be identified in the amputated part, they relied on leech therapy and systemic anticoagulation for venous drainage. Despite ...
Manspeizer H E - - 2001
The Thrombelastograph (TEG; Haemoscope Corp., Skokie, IL) coagulation analyzer is an effective point-of-care monitor for routine clinical practice and clinical research. Prior investigators have used either arterial or venous samples of blood for TEG measurements. We conducted this prospective cohort study to determine potential differences in TEG variables between arterial ...
Vellar I D - - 2001
BACKGROUND: Although there have been many studies of the arterial supply of the biliary system, attempts to study the corresponding venous drainage have been few and all have been incomplete. The purpose of the present investigation is to describe the anatomy of the venous drainage of both the intrahepatic and ...
Bracamonte M P - - 2001
Mechanisms by which estrogen reduces the risk of arterial disease, while simultaneously increasing the risk of venous thrombosis in postmenopausal women, are not clearly understood. In addition to providing beneficial arterial effects on the lipid profile, estrogen both increases production of nitric oxide and decreases production of endothelin-1 from arterial ...
Perrier A - - 2001
Suspected acute venous thromboembolism is a frequent and challenging clinical problem. Phlebography and pulmonary angiography are costly and invasive and, hence, ill-suited for diagnosing a disease present in only 20% of patients in whom it is suspected. Novel noninvasive instruments, such as plasma D-dimer measurement, lower limb compression ultrasonography and ...
Nakagawa M - - 2001
An intraoperative arterial stimulation, venous sampling method was recently used for resection of insulinoma. In using this technique, some anesthetic concerns complicate the usual management of insulinoma. We suggest methods for solving these problems.
Heinemann M - - 2001
BACKGROUND: Development of systemic venous collaterals after Glenn or Fontan procedures can lead to systemic desaturation and reduction in ventricular function, resulting in impaired everyday performance in patients with univentricular heart disease. METHODS: We analyzed 79 patients who had undergone a Glenn or Fontan procedure between 1995 and 1999 for ...
Olivares J L - - 2001
An 8-year-old male presented with a mass in the left supraclavicular region first noted 3 months earlier and which gradually became more prominent. Ultrasound showed a lobular, well-delineated hypoechoic lesion which increased in size on Valsalva manoeuvre. Doppler waveform analysis suggested a slow flow vascular lesion. Venography showed a saccular, ...
Stoney C M - - 2001
Arterialized and venous blood was compared to determine if the arterialization procedure enhances the detection of stress-related changes in catecholamines. Lipid and hematologic measures were also compared for possible distortion by arterialization. Fifteen men completed two stressors. Indwelling venous catheters were placed retrograde in each hand, and the right hand ...
Akyürek M - - 2001
The authors describe a case of microvascular ear replantation with repair of the artery only and medicinal leech therapy that survived for 14 days but ultimately failed as a result of the absence of development of venous channels between the replant and the recipient bed. A 35-year-old man presented with ...
Kato H - - 2001
We report a case in which venous occlusion occurred after fibular osteocutaneous flap transfer for open tibial fracture. The flap was salvaged using an external venous shunt. The shunt consisted of a Teflon catheter for intravenous infusion, a three-way stopcock, a urokinase-immobilised catheter and a pressurising bag for arterial-pressure monitoring. ...
Stack S P - - 2001
Primary hyperaldosteronism is a potential cause of hypertension. Unilateral adrenal adenoma and bilateral adrenal cortical hyperplasia are the most common causes of primary hyperaldosteronism. Adrenal venous sampling is employed as the gold standard test to differentiate between these two different causes when the results of other studies in the work-up ...
Allan P L - - 2001
Chronic venous insufficiency (CVI) is responsible for significant morbidity and health expenditure. Doppler ultrasound techniques provide a noninvasive method for identifying structural and functional abnormalities associated with CVI; this information then allows treatment options to be considered. Ultrasound allows clear identification of specific venous segments and provides information on the ...
Gale N W - - 2001
The Eph receptor tyrosine kinases and their membrane-tethered ephrin ligands provide critical guidance cues at points of cell-to-cell contact. It has recently been reported that the ephrin-B2 ligand is a molecular marker for the arterial endothelium at the earliest stages of embryonic angiogenesis, while its receptor EphB4 reciprocally marks the ...
Shin D - - 2001
The transmembrane ligand ephrinB2 and its receptor tyrosine kinase EphB4 are molecular markers of embryonic arterial and venous endothelial cells, respectively, and are essential for angiogenesis. Here we show that expression of ephrinB2 persists in adult arteries where it extends into some of the smallest diameter microvessels, challenging the classical ...
Pozarny E - - 2001
Clinically, a venous aneurysm is seen as a nonpulsatile mass with shrinkage upon elevation and enlargement with dependency. Confirmation of the diagnosis is best made by venography. In the case presented here of a rare aneurysm of the dorsal venous arch, the diagnosis of venous aneurysm was based on the ...
Berbero─člu M - - 2001
BACKGROUND: The corona mortis is defined as the vascular connections between the obturator and external iliac systems. While detailed information on the arterial anastomoses in corona mortis is available, a complete description of the venous system is lacking. Although the tiny anastomoses behind the pubic symphysis between the obturator and ...
Catalano C - - 2001
While reports of venous calcifications are scarce, vascular calcifications frequently occur in the arteries of uraemic patients. Venous calcification of an aged arterious-venous (a-v) fistula in a young patient with a long-standing history of hyperparathyroidism was detected on a forearm X-ray. Risk factors for vascular calcifications are still under debate, ...
Sencer A - - 2001
This case involved a 26-month-old boy who had recurrent hemorrhagic venous infarction caused by venous sinus occlusion. Distension and enlargement of the cavum septi pellucidi (CSP) and cavum vergae (CV), along with hydrocephalus, was detected during the course of the disease and was observed to regress together with resolution of ...
Flis V - - 2001
Although the presence of arteriovenous communications in patients with chronic venous ulcers has been confirmed in several studies, their role in the pathogenesis of venous ulcers is still uncertain. They possibly do play an important role in the aetiology of chronic venous insufficiency. There is also substantial evidence to suggest ...
Saran B R - - 2001
BACKGROUND: Familial primary pulmonary hypertension (PPH) is a rare, fatal, autosomal dominant disease that results in right heart failure from idiopathic obliteration of the pulmonary arteries. Patients develop stagnation of venous blood flow and elevated venous pressure. METHODS: The authors retrospectively reviewed the clinical records of three patients diagnosed with ...
Gerriets T - - 2000
Neurologic injury subsequent to decompression from diving may be due to paradoxical arterialization of venous gas emboli. Of 40 divers who performed 53 open water dives after being tested for a patent foramen ovale (PFO), arterial gas emboli were detected in 7 of 13 dives, which resulted in venous bubbles. ...
Fritsche R - - 2000
We used a newly developed digital motion analysis video technique to study the effects of nitric oxide (NO) and epinephrine on the early larval arterial and venous vasculature of zebrafish. Application of the NO donor sodium nitroprusside resulted in a significant increase in both the venous and arterial vessel diameters, ...
Robert J H - - 2000
During lung transplantation, the venous anastomosis is performed between the atrial cuffs of the donor and the receiver. In certain rare circumstances, however, the surgeon may find two veins and no possibility to reposition the clamp more proximally. A simple technique can be used in this case: both veins are ...
Mohr D N DN Division of Area General Internal Medicine, Mayo Clinic, 200 First St SW, Rochester, MN 55905, - - 2000
To estimate the incidence and determine predictors of venous stasis syndrome and venous ulcers after deep venous thrombosis and pulmonary embolism. This population-based retrospective cohort study reviewed medical records of 1527 patients with incident deep venous thrombosis or pulmonary embolism between 1966 and 1990. We recorded baseline characteristics, event type ...
Piatt J H - - 2000
The infratentorial supracerebellar approach is a popular technique for exposure of lesions of the superior vermis and pineal region. The cerebellomedullary fissure approach is enjoying increasing application as a technique for exposure of the fourth ventricle. Occasionally, a tumor that arises in the quadrigeminal plate or the superior vermis grows ...
Battistini B - - 2000
Upregulation of the endothelin (ET) system, following coronary ischemia-reperfusion injury, may contribute to coronary vasospasm and congestive heart failure. Because endothelin-1 (ET-1) is rapidly cleared from the circulation, the levels of its inactive precursor big ET-1 and the ET-1/big ET-1 ratio may constitute better ways to assess the activation of ...
Lapietra A - - 2000
OBJECTIVES: The proliferation of minimally invasive cardiac surgery has increased dependence on augmented venous return techniques for cardiopulmonary bypass. Such augmented techniques have the potential to introduce venous air emboli, which can pass to the patient. We examined the potential for the transmission of air emboli with different augmented venous ...
Wladis A R - - 2000
Angioaccess for hemodialysis in an extremity with disadvantaged venous outflow has reduced long-term patency. We hypothesized that arteriovenous bridge graft patency could be improved in patients with disadvantaged venous outflow by preoperative venous duplex mapping. The charts of 114 patients who underwent 115 prosthetic arteriovenous bridge grafts were reviewed. Disadvantaged ...
Min J Y - - 2000
BACKGROUND: The morphological definition of atrial chambers, and the determination of atrial laterality, are based on analysis of the structure of the atrial appendages. The systemic and pulmonary venous connections to the heart, nonetheless, are important in the management of patients having isomeric appendages. In this study, therefore, we analysed ...
Wakefield T W - - 2000
Prophylaxis for venous thromboembolism is an area that has received intense study in certain conditions, but less than adequate coverage in other areas. In considering who needs prophylaxis, patients are categorized into levels of risk. Clinical venous thromboembolism can be correlated to these levels of risk. Methods of prophylaxis include ...
Takase S - - 2000
The objective of this study was to assess the relationship of signaling molecules to monocyte/ macrophages as a precursor to venous valve and venous wall dysfunction in patients with varicose veins. One of the hallmarks of venous dysfunction is destruction of venous valves with subsequent reflux and elevation of distal ...
Durand P Y - - 2000
These authors report on validating their choice of disposable clamps in arterial and venous microsurgery in a comparative and experimental study using the scanning electron microscope. This appears to be the first evaluation of venous endothelial clamping lesions. Early intimal clamping lesions were studied using three different clamps and two ...
Weinfeld A B - - 2000
Any surgical intervention that involves the manipulation of veins, large or small, carries the risk of acute venous congestion. Venous congestion is the product of an imbalance between arterial inflow and venous outflow, and results in the stasis of blood in the tissues that are normally drained by the affected ...
Han S K - - 2000
Adequate venous repair is not always possible in fingertip replantation. We have used topical and systemic anticoagulation for fingertip replantation to overcome venous congestion in cases without venous repair or in cases in which there is obstruction of a repaired vein. Our technique consists of continuous external bleeding via a ...
Cihangiroglu M - - 2000
This report describes systemic-to-pulmonary venous connections at the pleural level resulting from superior vena cava occlusion. The interval development of new venous collaterals within a 3-year period represents an advanced manifestation of SVC occlusion in this patient with a history of pleural disease. In this case, progressive venous thrombosis caused ...
Gokel Y - - 2000
BACKGROUND/AIMS: The aim of this study was to examine a plausible correlation between venous and arterial blood gas values in acidotic patients with chronic uremia or diabetic ketoacidosis (DKA). METHODS: A total of 152 arterial and 152 venous blood samples from uremic patients (n = 100), DKA patients (n = ...
Harkin D W - - 2000
BACKGROUND: Complex limb trauma often involves combined arterial and venous injury, and the resultant ischaemia-reperfusion injury (IRI) causes both local and remote organ injury. This study assessed the influence of the timing of restoration of venous drainage on IRI. METHODS: Male New Zealand white rabbits (n = 36) were randomized ...
Lopez D M - - 2000
OBJECTIVE: This study tested the hypothesis that mixed venous carboxyhemoglobin concentrations (V-COHb) and internal jugular carboxyhemoglobin concentrations (I-COHb) accurately predict arterial carboxyhemoglobin concentrations (A-COHb). In addition, this study tested the hypothesis that there is a high correlation at low (COHb, 0% to 10%), moderate (COHb, >10% to 40%), and high ...
Hamada J - - 2000
OBJECT: Of all intracranial dural arteriovenous fistulas (DAVFs), those with cortical venous drainage associated with cortical venous ectasia or varices are predisposed to an aggressive course and produce progressive neurological symptoms or hemorrhages. The authors undertook a histological examination of venous aneurysms and arterialized veins in the proximity of these ...
Turner I C - - 2000
Strain gauge plethysmography (SGP) is a non-invasive method used in the detection of deep venous thrombosis (DVT). The technique is based on the measurement of calf volume changes in response to venous occlusion by a thigh cuff, the volume changes reflecting the rates of arterial inflow and venous outflow. A ...
Masson C - - 2000
We report two cases of cerebral venous angioma presenting as venous infarction, one in the left parietal lobe, the other in the left frontal lobe. Cerebral imaging demonstrated thrombotic occlusion of the draining vein of the venous angioma associated in the latter case with thrombosis of the anterior part of ...
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