Endoscopic subfacial ligation of perforator veins in the lower limb has been described in the treatment of venous stasis ulcer. An animal model to enable surgeons to become familiar with the surgical technique is presented. The model uses the porcine abdominal wall and allows practice in endoscopic dissection and ligation ...

PURPOSE: The aim of this study was to assess the anatomic distribution and extent of deep venous reflux in patients with primary varicose veins (PVVs) and to investigate its influence on venous hemodynamics. METHODS: Femoropopliteal venous reflux was examined using duplex color Doppler ultrasonography in 356 limbs with PVVs in ...

Coagulation tests were performed on two venous blood samples and two blood samples from arterial lines taken from 79 patients on an intensive care unit. For the first arterial sample the discard volume was 4.5 ml and for the second arterial sample the discard volume was 16 ml. From each ...

The regulation of vascular beta-adrenoceptor responses in humans has been studied in vivo in both arteries and veins. Because venous responses can be studied less invasively than arterial responses, they are an attractive substitute for the measurement of arterial responses, provided that venous responses are representative of responses in resistance ...

The venocutaneous fistula technique, which involves the construction of a temporary venous return bypass using a venous graft, was devised to prevent venous congestion after fingertip replantation surgery. The proximal side of the venous graft is anastomosed to a vein at the dorsum of the finger. The distal side of ...

PURPOSE: To clarify the correlation between aberrant gastric venous drainage and a focal spared area at the posterior edge of segment IV in fatty liver by using color Doppler ultrasound (US). MATERIALS AND METHODS: Seventeen patients with fatty liver were examined with gray-scale, color Doppler, and power Doppler US. In ...

The parenchymal veins, especially the deep medullary veins, of the cerebral hemispheres were studied in detail by analyzing the stereoroentgenograms of multiple brain slices of postmortem injected brain specimens (injected into the internal carotid arteries in 17 cases and into the jugular veins in 12 cases). The presence of four ...

PURPOSE: Although anticoagulation therapy for iliofemoral venous thrombosis prevents pulmonary embolism, it is not designed to avoid the postthrombotic syndrome. Mechanical removal of the thrombus in the form of venous thrombectomy should yield better long-term results. The purpose of our study was to analyze the clinical outcome and venous valvular ...

BACKGROUND: Venous ulceration is a significant clinical problem to both clinicians and patients. To optimize the management of patients with ulcers a single-visit, dedicated venous ulcer assessment clinic was set up. METHODS: All patients referred to the clinic during the first year were recorded prospectively. Each patient was assessed clinically ...

We present a 45-degree two-stage venous cannula that confers advantage to the surgeon using cardiopulmonary bypass. This cannula exits the mediastinum under the transverse bar of the sternal retractor, leaving the rostral end of the sternal incision free of apparatus. It allows for lifting of the heart with minimal effect ...

Liver glucokinase (GK) is localized predominantly in the perivenous zone. GK mRNA was induced by insulin maximally under venous O2 partial pressure (pO2) and only half-maximally under arterial pO2. CoCl2 and desferrioxamine mimicked venous pO2 and enhanced the insulin-dependent induction of GK mRNA under arterial pO2. H2O2 mimicked arterial pO2 ...

OBJECTIVE: To evaluate the usefulness of 99mTc labelled monoclonal antifibrin antibody SZ-63 for the detection of vascular thrombi, and to investigate the feasibility of thrombus imaging 99mTc-SZ-63. METHODS: The monoclonal antibody SZ-63 (Mab SZ-63), which reacts with D-dimer, XLFN and fibrin monomer was produced and labelled with 99mTc using pretinning ...

Intraoperative obliteration of cerebral veins occasionally causes unexpected severe complications, especially in elderly patients. However, very title information is available on the pathophysiology of cerebral venous circulation disturbance. Occlusion of cortical veins in rats by a photochemical thrombotic technique is a less invasive, clinically relevant and reproducible model that is ...

With improvements in imaging technology, the detection of both cavernous malformations and venous malformations has increased markedly in recent years. Although much has been learned about the association of cavernous and venous malformations, important questions regarding the true nature of such a relationship remain unanswered. It has been proposed that ...

OBJECTIVE: To determine the usefulness of indices of hypoxemia in assessing patients with the adult respiratory distress syndrome (ARDS). DESIGN: Retrospective analysis of previously published data that describe the distributions of ventilation and pulmonary blood flow in ARDS. SETTING: University research laboratory. PATIENTS: Sixteen patients with ARDS. INTERVENTIONS: The FIO2 ...

Intracranial venous magnetic resonance angiography (MRA) provides excellent visualization of dural venous sinuses and large deep and superficial cerebral veins noninvasively. It is a very useful imaging technique to evaluate venous sinus thrombosis. It also provides the planning and monitoring endovascular thrombolytic treatment for dural sinus thrombosis. Familiarization with normal ...

There are conflicting reports in the literature about the existence of arteriovenous shunting in legs with chronic venous insufficiency. Using duplex scanning, we have earlier shown that there is lowered peripheral resistance in the arteries of legs with venous ulcer together with premature venous filling in angiography. In the present ...

PURPOSE: Mechanisms of venous outflow from the leg and foot have not been clearly defined. The purpose of this study was to evaluate the anatomy and physiologic mechanism of the plantar venous plexus and its impact on venous drainage from the tibial veins. METHODS: Fifty phlebograms that contained complete foot ...

PURPOSE: To investigate why some patients with an intracranial dural arteriovenous fistula (DAVF) with spinal venous drainage have myelopathy and others do not. METHODS: We reviewed the clinical and radiologic data for 12 patients who had a DAVF with spinal venous drainage diagnosed at our institutions from 1982 to 1995. ...

So far, the venous side of vascular changes in expanded skin has been neglected by plastic surgeons. In this experimental study, using a rabbit saphenous flap model, the author attempts to document the changes in the cutaneous venous tree that occur following expansion. Fifteen male New Zealand White rabbits were ...

Manifestation of atherosclerosis is one of the alterations in venous bypass grafts. Its progression and morphology usually cannot be described by sonography. The venous part of a hemodialysis fistula can be compared to a venous bypass graft. The authors investigated the venous part of hemodialysis fistula in 16 patients. They ...

During a routine coronary revascularization procedure in a 51-year-old man, venous return was suddenly interrupted. The venous cannula was rapidly removed, revealing the pulmonary artery catheter wrapped around it. The catheter also had entered the lumen of the cannula, and the inflated balloon completely obstructed the venous return. The prompt ...

The aim of this study was to assess the lipid peroxidation in chronic leg ischaemia by determining thiobarbituric acid reactants. Furthermore, Cu, Zn-superoxide dismutase and glutathione peroxidase activities as well as the trace element profile (Zn, Cu, Se, Mg) were determined. Fasting blood samples from the common femoral artery and ...

OBJECTIVE: Despite the advent of the nerve-sparing radical retropubic prostatectomy (NSRRP) a significant number of men still suffer from post radical prostatectomy impotence. The purpose of this study was to investigate the pathogenesis of erectile dysfunction following NSRRP and to define the previously reported vascular mechanism. Furthermore, it was our ...

OBJECTIVES: Review of venous lesions in Behçet's disease (BD). DESIGN: Retrospective study. SETTING: University Hospital, Turkey. MATERIALS AND METHODS: One hundred and twenty nine patients with BD diagnosed and treated in our hospital during the last 10 years were reviewed. Fifty-two patients with 54 vascular lesions of Behçet's disease were ...

Thrombosis is the most frequent cause of failure in microvascular free-tissue transfer. The large communicating vein of the cubital fossa connects the deep and superficial venous drainage of the radial forearm free flap (RFFF). This vein allows the surgeon to simultaneously drain both systems by means of the large veins ...

Arterial ulcers occur because of inadequate perfusion of skin and subcutaneous tissue at rest. Arterial occlusive disease, common among smokers, diabetics and the elderly, can lead to claudication, rest pain and gangrene, in addition to localized ulceration. Other processes, such as venous stasis, pressure, trauma, and vasculitis, can also cause ...

Revascularization of tissues through their venous system is currently used in vascularized venous flaps and in replantation of some fingertips. A toe-to-hand transfer that suffered prolonged and unexplainable arterial spasm, unrelenting to the usual therapeutic measures, was revascularized through its venous system. Tissue perfusion in the toe began 24 hours ...

In 54 patients with unilateral leg ulceration of purely venous aetiology the only difference in venous reflux between affected and non-affected legs was with respect to the popliteal and crural veins. Deep and superficial venous reflux is common in legs without the skin changes typical of chronic venous insufficiency. The ...

We have compared propofol concentrations in arterial and arterialized venous blood (from the radial artery at the wrist and a vein in the opposite forearm) in five volunteers during a sub-anaesthetic increasing infusion regimen designed to produce pseudo-steady-state arterial concentrations of 0.06, 0.17 and 0.43 micrograms ml-1. As in a ...

Chronic venous insufficiency which produces lipodermatosclerosis, varicosities, or ulceration, is frequently caused by superficial venous reflux and deep venous incompetence. The anatomy of venous insufficiency has been clarified with duplex ultrasound, thus allowing appropriately directed therapy. However, postoperative venous physiology in patients undergoing superficial venous ablation has been infrequently reported. ...

When arterial blood samples for activated clotting time (ACT) are difficult to obtain from the arterial sheath during coronary intervention, venous ACT serves as a substitute. Data are lacking on whether arterial and venous ACT are identical and whether one can serve as an effective substitute for the other. Forty-eight ...

We performed diagnostic laparoscopy in a patient who was critically unstable while on an ABIOMED BVS 5000 biventricular assist system. A relatively unique feature of the ABIOMED is the venous return being dependent only on gravity and the drawing force of venous return being the height of the inflow cannula ...

The pterygoid venous plexuses are closely adjacent to the lateral pterygoid m. and occupy a considerable part of the infratemporal fossa (ITF). We have conducted a study after injection of colored latex in 10 unemblamed subjects in order to define the arrangement of the venous network and to assess the ...

We report a case with segmental arterial calcification and atheromatosis of the superficial femoral artery in a patient with venous angiodysplasia (Klippel-Trenaunay syndrome). Pathogenesis remained unclear. A short hemodynamically significant stenosis within the calcified segment was treated by angioplasty requiring high balloon pressure and was complicated by an arterio-venous fistula. ...

PURPOSE: The venous filling index (VFI) was introduced as a noninvasive measure of venous valvular reflux. Because it is quantitative, identifying increasingly severe reflux should be possible. The purpose of this study is to evaluate the sensitivity and predictive value of the VFI as a predictor of phlebographically demonstrated "critical" ...

Between January 1991 and December 1993, duplex ultrasound characterization of venous disease in leg swelling was studied in 214 patients (261 limbs; 167 unilateral and 47 bilateral). All patients were examined with a duplex scanner, the superficial and deep venous systems were evaluated for the presence of thrombus and valvular ...

A cerebral venous malformation ruptured after acute thrombosis of its central draining venous channel, leading to intracerebral hemorrhage. The CT, MR, and angiographic studies unequivocally demonstrated subsequent progressive recanalization of the malformation, providing proof that venous malformations can spontaneously bleed and that venous thrombosis may be associated with, and perhaps ...

RATIONALE AND OBJECTIVES: We tested whether testicular torsion could completely damp distal arterial pulsatility, resulting in venous-appearing arterial waveforms. METHODS: Progressively increasing testicular torsion was unilaterally produced in five rats. Doppler waveforms of the testicular artery distal to the torsion were obtained as soon as possible after each level of ...

Venous vessels (vena saphena magna) and arteries (left internal mammary artery) from patients treated with long-term ( > 24 h) intravenous infusions of nitroglycerin (CAS 55-63-0, glyceryl trinitrate, GTN) prior to coronary by-pass surgery were studied. Tissue concentrations of GTN and its dinitrate metabolites were determined as well as plasma-concentrations ...

OBJECTIVES: To determine the benefits of using a single venous catheter and a single angiogram during catheter occlusion of a patient arterial duct with the Rashkind double umbrella compared with those of venous and arterial catheters and multiple angiograms. DESIGN: Retrospective review of case notes. PATIENTS: 103 consecutive patients. The ...

The mechanisms regulating venous tone have an important effect on whether a patient develops the complication on post operative venous thrombosis. In animal studies, venous endothelial damage has been demonstrated in veins remote from the operative wound, and correlated with the amount of operative venodilation. In human studies, operative venodilation ...

PURPOSE: Work posture and occupation are among the most controversial predisposing factors associated with venous disease. We examined the distribution and extent of venous reflux in the lower extremities of symptom-free vascular surgeons, who were typically classified as leading a life of prolonged standing, in comparison to a group of ...

Air-plethysmography has been used in order to measure resting arterial inflow in 25 normal limbs and 126 limbs with various grades of venous disease. Twenty five limbs had venous ulcers. Resting arterial inflow was 60-95 ml/min in normal limbs (95% range), 60-110 ml/min in 45 limbs with uncomplicated varicose veins, ...

A consecutive series of 50 patients with large leg ulcers (surface area > 100 cm2) were investigated for evidence of arterial, venous and nutritional problems. Arterial insufficiency was found in 34%, venous reflux in 50%. A group of eight patients had no arterial or venous problem but had serious deficiencies ...

A morphometric evaluation, utilising a computerised system, was undertaken to quantify the growth of blood vessels in the chick area vasculosa, between the 2nd and the 5th incubation days. In this phase of embryonic growth the total length of the vascular tree for the arterial and venous systems alone, increases ...

Primary venous aneurysms are rarely encountered lesions. Case reports have been described throughout the venous system. The lesions are usually symptom-free being found as a subcutaneous mass, an incidental finding on an imaging study, or during the work-up for deep venous thrombosis. However, embolism and rupture have been rarely described. ...

We have presented an alternative form of management for the difficult ear replant in which conventional venous outflow cannot be reestablished. Early and aggressive medicinal leeching provided an excellent means of venous decompression until neovascularization had taken place. The primary use of leeches in such small composite replants may be ...

A 35-year-old male presented with trigeminal neuralgia associated with venous angioma at the root entry zone. Magnetic resonance imaging and angiography demonstrated a venous angioma with a dilated petrosal draining vein, and displacement of the anterior inferior cerebellar artery (AICA). The AICA and dilated petrosal vein were both decompressed, resulting ...

The place of deep venous valve reconstruction in the surgical management of the patient with chronic venous insufficiency has become clearer with collected experience over the past 25 years. The reasons to perform surgery in chronic venous disease and the specific rationale for deep venous repair are contrasted with the ...