Search Results
Results 201 - 250 of 1038
< 1 2 3 4 5 6 7 8 9 10 >
Ibrahim Irwani - - 2011
Background: Because arterial punctures are more painful, venous blood gas analysis has been proposed as an alternative. Objectives: To determine if venous pCO(2) can replace arterial pCO(2) in emergency patients using a bedside blood gas analyzer. Methods: This is a cross-sectional study. We recruited patients who were deemed by the ...
Schoevers Jaco - - 2009
Conventional pulse oximetry has limited accuracy in measuring blood oxygen saturation in low-saturation and -perfusion scenarios. This limits the application of pulse oximetry in patients suffering from peripheral vascular afflictions. We present a novel pulse oximetry system that proposes solutions to these low-saturation and -perfusion scenarios by inducing an artificial ...
Unruh Kenneth P - - 2008
Objectives of this study include identification of lumbosacral venous variations, designation of a critical area of dissection for surgical exposure, and comparison between both male/female and right/left-sided anatomy. Attempts were made to provide anatomic nomenclature that accurately describes these structures. Thirty-eight iliolumbar venous systems in 20 cadavers (11 females/9 males) ...
Seo Sang-Hee - - 2008
Venous aneurysm can be classified into superficial or deep and secondary or primary. The aim of this study was to introduce primary venous aneurysm of the superficial venous system and to report the experiences treating it with sclerotherapy. A retrospective study with 120 cases of venous dilatation detects 4 patients. ...
Morimoto Akira - - 2009
Severe congestion with petechiae and/or small hemorrhages over a wide area consisting of the subcutaneous and mucous level of the head and neck is observed in most cases of strangulation and positional asphyxial death. Congestion present above the strangulation mark is accepted as a vital reaction. Although the congestion results ...
Martinelli Ida - - 2008
Venous thromboembolism may involve venous sites other than the lower limbs, such as cerebral, splanchnic, and upper limb veins. Although uncommon, these thromboses may be clinically severe and challenging for caregivers. In this review, the main pathogenic, clinical, and therapeutic features of thromboses in rare venous sites are discussed. Even ...
Toft Mette Helene - - 2008
In order to elucidate the circulatory and respiratory effects of a newly developed abdominal compression binder 25 healthy, normal weight subjects were studied. In supine position the central haemodynamics were measured and estimated with a Finapress device. Lower extremity venous haemodynamics were measured in supine position with venous occlusion plethysmography. ...
Lee Jason T - - 2008
Superficial venous thrombophlebitis (SVT) is characterized as a localized inflammatory condition of the venous vessels underlying the skin. It arises from thrombosis of a superficial vein, and clinical presentation usually involves pain, erythema, and tenderness at the sites of inflammation. Although the condition is usually self-limited and not serious or ...
Paolini David J - - 2008
Venous obstruction is an underappreciated and often unrecognized component of the pathophysiology of symptomatic chronic venous disease (CVD). Moreover, standard methods used to detect venous obstruction, such as maximal venous outflow, are inadequate as they typically test patients at rest and in the supine position when the pathophysiology of CVD ...
Misra Sanjay S Department of Radiology, Mayo Clinic College of Medicine, 200 First Street Southwest, Alfred 6460, Rochester, MN 55905, USA. - - 2008
Because fetuin-A is a cytokine with multifunctional effects on vascular smooth muscle cells and fibroblasts, the authors examined the course of its expression in early venous stenosis formation in a porcine model of chronic renal insufficiency with polytetrafluoroethylene (PTFE) arteriovenous (AV) hemodialysis grafts. Pigs had chronic renal insufficiency created by ...
Trovato Matthew J - - 2008
Successful microvascular ear replantation is well described, and often involves the use of arterial inflow anastomoses with leeches and systemic anticoagulation to augment outflow. Failed replantation attempts have also been published, with most of the failures attributed to venous drainage problems. A case of successful replantation of an ear is ...
Polguj M - - 2008
The aim of the study was to compare the blood vessel network of the human and bovine male gonads, paying special attention to differences resulting from mediastinum testis localisation. Two groups of specimens were compared. Each group consisted of 50 corrosive die casts of the testicular and spermatic cord vessels ...
Gilkeson Robert C - - 2008
Multislice computed tomography technology has enabled sophisticated insights into the evaluation of collateral venous pathways in the thorax. A small but well-established body of literature has described the multiple venous pathways in patients with central venous obstruction. In unusual circumstances, however, physiologically maladaptive pathways have been described involving systemic to ...
Barker Emma V - - 2008
PURPOSE OF REVIEW: The use of microvascular anastomotic devices remains controversial in head and neck reconstructive surgery. Although more acceptable in venous anastomosis, their use in arterial anastomosis remains limited. We review the literature to evaluate the evidence both for and against their use, in both venous and arterial anastomoses. ...
Hua Hong T - - 2009
Phlegmasia cerulea dolens is a devastating complication of massive deep venous thrombosis, which is clinically characterized by massive lower extremity tissue edema and subsequent arterial insufficiency. These experiments evaluated the local tissue effects of acute global venous obstruction combined with partial arterial ischemia. Experiments were performed to assess the effects ...
Paolini David J - - 2008
Lower extremity chronic venous disease is due to venous hypertension resulting from reflux and/or obstruction. Studies of venous valvular function have validated and quantified valve closure times defining normal and abnormal valve function, and investigators have categorized the amount of venous reflux with validated criteria. However, hemodynamics of venous outflow ...
Power K T - - 2009
Occasionally in plastic surgery immediate microvascular arterial repair is not possible. This occurs when distal vessels in the extremities are extensively damaged or thrombosed. If there is some intact venous anatomy it may be possible to maintain adequate perfusion for viability using a gravitational retrograde venous perfusion technique, until collateral ...
Williamson J M L - - 2008
INTRODUCTION: Popliteal venous aneurysms are rare and can cause recurrent pulmonary emboli despite adequate anticoagulation. REPORT: A 43-year old patient with known antiphospholipid syndrome developed an extensive pulmonary embolus and ischaemic stroke despite anticoagulation. Duplex ultrasound confirmed a right popliteal venous aneurysm containing non-adherent multi-layered thrombus. At operation an 8 ...
Schilling R F - - 2008
BACKGROUND: It is probable that the variety and frequency of delayed adverse vascular events after splenectomy are underappreciated. Splenectomy is performed for a wide variety of conditions, and delayed postsplenectomy hazards are not often studied. OBJECTIVE: To estimate the relative risk of adverse vascular events in members of hereditary spherocytosis ...
Ferroli Paolo - - 2008
OBJECTIVE: We describe the intraoperative findings and results of an indocyanine green (ICG) video angiographic study in a patient with a developmental venous anomaly of the petrous veins. CLINICAL PRESENTATION: A 56-year-old man sought treatment after experiencing lacerating facial pain on the right side for almost 2 years. His neurological ...
Al-Kilani Alia - - 2008
The adult vasculature is comprised of three distinct compartments: the arteries, which carry blood away from the heart and display a divergent flow pattern; the capillaries, where oxygen and nutrient delivery from blood to tissues, as well as metabolic waste removal, occurs; and the veins, which carry blood back to ...
Imanishi Nobuaki - - 2008
Veins of the dermis have been investigated mainly by histological methods in the fields of anatomy and histology, and a large number of schemata of the veins have been depicted in a variety of textbooks. However, the schemata are usually two-dimensional and it is therefore difficult to envisage the actual ...
Shad Amjad - - 2008
Perimesencephalic nonaneurysmal haemorrhage (PMNH), a term first coined in 1985, is a diagnosis of exclusion. It is considered a benign form of subarachnoid haemorrhage with a good prognosis and a low risk of rebleeding. Its precise aetiology has not yet been determined. Haemorrhage of venous origin has been proposed as ...
McBane Ii Robert D - - 2008
The literature is filled with randomized controlled trial data to guide most steps in managing patients with deep venous thrombosis of the extremities or pulmonary embolism. Venous thrombosis, however, is not limited to these locations and may involve the cerebral venous sinuses, renal veins, splanchnic veins, and ovarian veins. The ...
Vergouwen Mervyn D I - - 2008
PURPOSE OF REVIEW: Patients with acute stroke and traumatic brain injury are at risk to develop venous thromboembolism. This review analyzes the available literature to propose guidelines for the prevention and treatment of venous thromboembolism in these groups of patients. RECENT FINDINGS: In acute ischemic stroke, low-dose low-molecular-weight heparin has ...
Lowe Gordon D O - - 2008
Arterial and venous thromboses have traditionally been viewed as distinct conditions, with differences in risk factors, pathology and treatment. However, recent epidemiological studies have suggested associations between venous thromboembolism, arterial thromboembolism (myocardial infarction and stroke) and atherosclerosis. While several biological mechanisms might contribute to these associations, common risk factors for ...
Weaver Fred A - - 2008
Until recently, acute arterial or venous thromboses were routinely managed with surgical intervention. With the development of effective thrombolytic pharmacologic agents and improved modes of delivery of these agents to the target site, surgery is no longer the only option. Greater understanding and knowledge about the finely orchestrated, counterbalanced processes ...
Carr Sandra C - - 2008
Venous ulceration of the lower extremities is a common and often disabling condition. Venous ulcers are the result of a chronic inflammatory condition caused by persistent venous hypertension. Therapy is directed at counteracting the chronic inflammation in the tissues and at decreasing ambulatory venous hypertension in the area. Compression therapy ...
Kilgallon Conor - - 2008
Arterial and venous blood-gas and acid-base values were established from a herd (n = 19; 14 male, 5 female) of semi-free-ranging Arabian oryx (Oryx leucoryx) in the United Arab Emirates. The animals were restrained with the use of a modified raceway incorporating a commercially available handling crate. Statistically significant differences ...
Kassab Ghassan S - - 2008
The potential of the coronary veins for revascularization has been evaluated by many investigators for more than a century. The major hurdle has been the damage of veins during sudden exposure to arterial pressure. The solution to this problem has typically involved the use of intricate and complicated apparatus and ...
van den Wijngaard J P H M - - 2008
BACKGROUND: The twin-to-twin transfusion syndrome (TTTS) is a severe complication of monochorionic twin pregnancies, caused by a net inter-twin transfusion of blood from one fetus (the donor) towards the other fetus (the recipient) through placental anastomoses. TTTS is driven by unidirectional arterio-venous anastomoses, and mitigated by bidirectional arterio-arterial or veno-venous ...
Bateman Grant A - - 2008
A reduction in the proportion of the arterial inflow drained by the superior sagittal sinus in idiopathic intracranial hypertension (IIH) patients without stenoses has been noted and this has suggested elevated collateral flow. This study defines the interaction between arterial inflow and venous outflow in patients with outflow stenoses and ...
Abend Nicholas S - - 2008
A previously healthy 2-year-old boy presented with the acute onset of left middle cerebral artery syndrome. Evaluation revealed subarachnoid hemorrhage and a vein of Galen aneurysmal malformation with angiographic reflux into the deep venous system. Analysis of the angioarchitecture of the lesion demonstrated the basis of the hemorrhage to be ...
Fonseca Ana G - - 2008
ABSTRACT: Patients with antiphospholipid syndrome are at increased risk for recurrent arterial and venous thrombosis and therefore benefit from long term warfarin therapy. The optimal duration of warfarin therapy after a first venous thromboembolic event is however a matter of some controversy and many questions remain unanswered. After reviewing and ...
Moritz Stefan - - 2008
To investigate the accuracy of jugular bulb venous monitoring in detecting cerebral ischemia, we performed ipsilateral jugular bulb venous monitoring in 48 patients undergoing carotid surgery under regional anesthesia. Cerebral ischemia was assumed when neurologic deterioration occurred. During carotid clamping, the maximal arterial-jugular venous oxygen content difference [AJDO2 (max)], the ...
Symvoulakis Emmanouil K - - 2008
Popliteal venous aneurysms are uncommon but potentially fatal vascular disorders. They can be symptomatic or asymptomatic, mimicking different conditions. Popliteal venous aneurysms are possible sources of embolism. A 68-year-old woman presented at a rural primary health care unit in Crete, Greece, reporting local symptoms of discomfort in the right popliteal ...
Neglén Peter - - 2008
Ilio-caval venous obstruction has an important role in the expression of symptomatic chronic venous disease regardless of aetiology. The presence of obstruction has been more or less previously ignored and emphasis placed on reflux alone. Stenting of the ilio-femoral veins guided by intravascular ultrasound (IVUS) can now be performed with ...
Tubbs R Shane - - 2008
A venous anastomotic network is occasionally found at the base of the brain, which closely resembles the vicinal arterial circle of Willis. When present, this venous polygon is composed of the anterior cerebral and communicating veins, the basal vein of Rosenthal and the posterior communicating and lateral mesencephalic veins. We ...
Rawat Nanda S - - 2008
True venous aneurysms are rarely-observed causes of neck swelling reported in children. We describe a 59-year-old female with a history of left-sided neck swelling due to external jugular venous aneurysm diagnosed by MSCT angiography. Thrombosis in external jugular venous aneurysm as in this case is extremely rare. Incidental note was ...
Pengo V - - 2008
It has been reported that IgG to oxidized LDL/beta2-glycoprotein I (oxLDL/beta2GPI) complexes are associated with arterial thromboembolism (TE) in patients with antiphospholipid syndrome (APS). How these antibodies behave in arterial as compared to venous TE in APS is unknown. The aim of the present study was to evaluate the association ...
Shadinger Libby L - - 2008
OBJECTIVE: The purpose of this study was to determine the most closely associated sonographic and clinical characteristics of ovarian torsion. METHODS: The medical records and sonographic studies of 39 patients with pathologically proven ovarian torsion diagnosed at our institution from July 1, 2000, through December 31, 2005, were retrospectively reviewed. ...
Lu Wei - - 2008
Observation of circulation in replanted severed fingers often relies on the clinical experience of the doctor. This article discusses nail fold capillary loops (NFCL) observation in the monitoring of the perfusion and circumfluence of replanted digits. In our study, 30 patients with a total of 39 replanted digits were selected. ...
Morelle Johann - - 2009
Venous thromboembolic disease is a well-documented complication of Klinefelter's syndrome, even if mechanisms underlying this prothrombotic state have not been conclusively established. On the contrary, arterial thrombosis is far less frequent, and a case of a patient with Klinefelter's syndrome presenting with simultaneous venous thrombtoembolic disease and a complete thrombosis ...
Meissner Mark H - - 2007
Secondary chronic venous disorders (CVD) usually follow an episode of acute deep venous thrombosis (DVT). Most occluded venous segments recanalize over the first 6 to 12 months after an episode of acute DVT, leading to chronic luminal changes and a combination of partial obstruction and reflux. Such morphological changes produce ...
Meissner Mark H - - 2007
Primary chronic venous disorders, which according to the CEAP classification are those not associated with an identifiable mechanism of venous dysfunction, are among the most common in Western populations. Varicose veins without skin changes are present in about 20% of the population while active ulcers may be present in as ...
Vignes Jean-Rodolphe - - 2007
OBJECT: The cerebral venous regulation involved in various physiological and pathological processes has received little attention. Here the authors describe the anatomy of the junction between the cortical vein and the superior sagittal sinus (SSS) and propose a new theory of cerebral venous regulation. METHODS: Ten adult human cadaveric heads ...
Lazarides M K - - 2007
There is a need for quantitative investigations in the vascular laboratory to manage lower extremity ulcers. The majority of leg ulcers are of venous (45%-60%) or arterial origin (10%-20%). Despite the increasing complexity of new devices used in vascular surgical practice, the anklebrachial pressure index (ABPI) remains the cornerstone for ...
Tomita Tatsuo - - 2008
Histopathological localization of lymphatic vessels has been hindered because of a lack of suitable immunocytochemical markers for lymphatic vessels. Using lymphatic vessels endothelial hyaluronan receptor-1 (LYVE-1) immunocytochemical staining, hyperplastic polyps, tubular adenomas to villous adenomas, were investigated for lymphatic vessels compared with immunostained blood vessels using factor-8. Four cases each ...
Cenzato M - - 2007
A 45-year-old man presented with a history of dysaesthesiae, sensory impairment of the legs and sphincter disturbances. Selective angiography showed a mid-thoracic dural arterio-venous fistula with five shunt points. The venous plexuses were demonstrated by injections at T5 on the right side and T6 on the left, but the venous ...
Reis Cassius V C - - 2007
OBJECTIVE: The superficial venous system of the posterior neck (suboccipital venous plexus) is a potential source of complications from bleeding and air embolism. Because there is little information available about this in the literature, an anatomic study of the superficial posterior neck venous system and a morphometric analysis of the ...
< 1 2 3 4 5 6 7 8 9 10 >