Search Results
Results 601 - 650 of 1019
< 8 9 10 11 12 13 14 15 16 17 18 >
RafaƂowska J - - 1995
Authors present two cases of basilar artery aneurysm accompanied by different development failures of blood vessels. In both cases anomaly in formation of brain base vessels, angioma consisted of different size thin-walled vessels and arterio-venous angioma within brain stem were stated. Besides, conglomerates of abnormal vessels, angiosis within pia matter, ...
Wang Y P - - 1994
To compare the arterial and venous concentration differences of propofol, six healthy adult patients received a propofol infusion by the Bristol three-stage manual stepdown technique. Both the mean arterial and venous concentrations of propofol remained relatively stable during the 40-min infusion. Simultaneous blood sampling from the artery and vein during ...
Pecirep D P - - 1994
A man received a gunshot wound to his face without an exit wound. His initial chest roentgenogram was normal, but a second one revealed a bullet in the chest. Under fluoroscopic monitoring, we moved the projectile from the right heart cavities to the right femoral vein, where it was removed ...
Dalsing M C - - 1994
The objectives were to transplant a venous valve into the popliteal vein of a canine insufficiency model that would maintain long-term function and then to measure the hemodynamic benefit of such a valve. Indexes of venous valvular function, including venous filling time, 90% of venous refilling time, and simulated ambulatory ...
Beards S C - - 1994
We investigated the variability of arterial, mixed venous and peripheral venous oxygen saturation readings in three co-oximeters in regular use on two Intensive Care Units. Over a 2-week period, 96 readings were obtained from each of the following machines; two AVL 912 co-oxylite co-oximeters (Machines A and B, Biomedical Instruments, ...
Baird D E - - 1994
A series of six hemodialysis vascular access patients was evaluated with duplex Doppler sonography and angiography to identify Doppler sonographic parameters that are predictors of venous outflow stenosis. This preliminary series indicates that no venous outflow stenosis was present angiographically when the resistive index gradient across the venous anastomosis is ...
Tucker K J - - 1994
This investigation was designed to evaluate the changes in arterial and mixed venous acid-base conditions during untreated ventricular fibrillation and after institution of cardiopulmonary resuscitation (CPR). Fifty-two swine (weight: 25-40 kg) were studied after induction of ventricular fibrillation. In a subgroup of 10 animals, 10-min CPR trials were performed. Arterial ...
Tong Y - - 1994
BACKGROUND: The limitations of continuous wave (CW) Doppler have been recognized in the assessment of venous reflux since CW Doppler is not able to distinguish reflux signals from more than one vein. In our experience, some regions with venous reflux suggested by CW Doppler were noted to have no reflux ...
Smith M V - - 1994
In an earlier experiment, we briefly exposed 15 young men to high levels of CO while simultaneously monitoring arterial and peripheral venous HbCO levels. The arterial HbCO levels were considerably higher than the venous levels during the CO exposure. Furthermore, great variation in the difference between arterial and venous HbCO ...
Marker J C - - 1994
We assessed simplified approaches to measurement of steady-state norepinephrine (NE) kinetics (short, nonprimed infusions of [3H]NE or of unlabeled NE and arterialized venous sampling), then reexamined the kinetic mechanism(s) of the age-associated increase in plasma NE, and tested the hypothesis that the latter is the result of a sedentary lifestyle. ...
Ciricillo S F - - 1994
The case of a young girl with a pericallosal venous malformation associated with multiple cryptic vascular malformations (CVM's) is described. The presenting cryptic malformation, which hemorrhaged, was completely excised, but the venous malformation was not. Routine follow-up magnetic resonance images obtained over the past 9 years have documented the development ...
Wang Z G - - 1994
To assess the safety and efficacy of polydioxanone suture (PDS) for vascular anastomoses, bilateral carotid end-to-end anastomoses using PDSs on the left and Dacron sutures on the right in 18 dogs were performed. The anastomoses were assessed at 4, 6 and 8 weeks after surgery. A breaking-strength test (300 mmHg) ...
Ramos E - - 1994
Arterial reconstruction is not applied in most studies of hepatic transplantation. Differences in some parameters related to the microcirculatory status, depending on whether the graft has been subjected to both arterial and venous or only venous reconstruction have been demonstrated. We have evaluated whether arterialization has an effect on the ...
Gray R J - - 1994
PURPOSE: Balloon angioplasty and directional atherectomy frequently have short-lived results for stenoses associated with hemodialysis. Results are reported for a phase I trial of the pullback atherectomy catheter (PAC) for treatment of hemodialysis access-related stenoses. PATIENTS AND METHODS: Six intragraft and six venous stenoses in nine patients were treated with ...
Vico P G - - 1994
A preliminary study demonstrated the existence of a fractal structure for perforator arterial vessels of the skin and proved to be a useful tool to compare vascular trees on the basis of their complexity. Fractal analysis of axial-perforator arteriovenous vascular trees was performed on the skin of mice after injection ...
Katsamouris A N - - 1994
The purpose of this study was to investigate the distribution of vein incompetence and the nature of venous haemodynamics accompanying the development of lower extremity primary varicose veins (LEPVV). The entire venous circulation of 77 lower extremities in 55 patients (pts) with LEPVV was evaluated, by using Duplex colour Doppler ...
Warner M F - - 1994
Although the activated clotting time (ACT) is commonly used to assess adequacy of anticoagulation during percutaneous transluminal coronary angioplasty (PTCA), there is uncertainty whether measurements on samples from the arterial and venous circulations are directly comparable. We performed ACT determinations on 115 patients undergoing PTCA at our institution. Blood samples ...
Fiessinger J N - - 1994
Arterial and venous thrombotic complications have being increasingly recognized as a major cause of mortality and morbidity in polycythemia vera. The risk can be increased with the treatment. Actually, we can not precisely evaluate the risk of previous venous and arterial lesions, however we have non invasive techniques that permit ...
Murdoch I A - - 1994
Seven critically ill children had simultaneous measurement of whole blood lactate concentrations obtained from a systemic arterial and mixed venous (pulmonary artery) site. An excellent correlation was found (r = 0.995). The mean difference between arterial and mixed venous values was 0.02 mmol/l and the limits of agreement (+/- 0.22) ...
Malanin K - - 1994
In the literature there is disagreement concerning the existence of arteriovenous shunting in legs with venous ulcer(s). The aim of this study was to find out if there are differences in resistance in the arteries of ulcer legs and non-ulcer legs and if it is possible to investigate this with ...
Diesfeld T - - 1994
An arterial venous bridge has been routinely interspaced between the arterial and the venous lines of the pump circuit during cardiopulmonary bypass at our institution for over 25 years. We have found it to be extremely useful in certain situations: (1) prepump priming and equipment failure; (2) recirculation of pump ...
Leighton H - - 1994
Using dilute concentration of heparin in continuous flush systems for arterial and venous invasive cannulae is an established practice in intensive care units (ICUs) throughout the UK. It is, however, practical to maintain the patency of these lines using 0.9% sodium chloride, thus reducing the possibility of drug interactions, systemic ...
Guzmán R - - 1994
We report a case of arterial fibrodysplasia causing vascular disease with ulceronecrotic lesions in lower extremities. The arteriography showed a beaded pattern in both arteries and veins; laboratory test findings were within normal value ranges; the biopsy reported medial hyperplasia involving the arterial and venous walls. Arterial fibrodysplasia should be ...
Swartz W M - - 1994
The purpose of this study was to compare the sensitivity of a 20-mHz ultrasonic Doppler device to detect microvascular thrombosis placed on the vein with that placed on the artery. A feasibility study in animals preceded a comparative clinical study in patients. Six rabbits were used to develop a bilateral ...
Hiyama H - - 1994
Many factors have been suggested as possible mechanisms for the development of peritumoural oedema in meningioma. Venous compression by the tumor is thought to be one factor, but reports presenting a direct relationship between venous compression and the formation of oedema are rare. We have recently observed 6 meningioma patients ...
Pritz M B - - 1994
Six patients with ruptured supratentorial arteriovenous malformation (AVM) and an associated venous aneurysm (ectasia, dilatation, varix, pouch) are described. At presentation, patients ranged in age from 16 to 61 years and were equally distributed according to sex. Maximal AVM diameter was between 2.5 and 5.0 cm at presentation while the ...
Ekman P - - 1994
As a serious complication to arterial penile revascularisation arterio-venous shunting was observed in a 60 years old male. The patient suffered bilateral obstruction of his pudendal arteries. Following revascularization using the left inferior epigastric artery he obtained good pulsation in the penis but no return of sexual function. Instead his ...
Rommel S A - - 1993
The cetacean reproductive system is surrounded by thermogenic locomotory muscle and insulating blubber. This arrangement suggests elevated temperatures at the uterus that could induce detrimental effects on fetal development. We present anatomical evidence for a complex countercurrent heat exchange system that could function to regulate the thermal environment of the ...
Durkin R - - 1993
It has been reported that under normal conditions, mixed venous blood gases have approximated arterial samples; however, during cardiac arrest or severe cardiogenic shock, marked differences between arterial and venous blood gases have been noted. To further assess the relationships between arterial and mixed venous blood gases and cardiac index, ...
Aldridge S C - - 1993
Two new cases of popliteal venous aneurysm are reported and added to the 22 other cases of popliteal venous aneurysm available for review. Both patients were first seen with acute pulmonary embolism and were treated with thrombolytic therapy followed by anticoagulation. Each had recurrent venous thromboembolism before discovery of the ...
Somjen G M - - 1993
BACKGROUND: Earlier studies using Doppler ultrasound suggested that thigh telangiectasia might be associated with reflux in the larger subcutaneous veins. OBJECTIVE: The aim of the study was an accurate description of the anatomy of the venous drainage from thigh telangiectases and evaluation of the extent of venous valvular incompetence using ...
Agroyannis B - - 1993
Normally the differences in arterial-venous pH (A-VpH) and veno-arterial pCO2 (V-ApCO2) are small and constant. This study deals with A-VpH and V-ApCO2 and their effect on arterial-venous saturation hemoglobin percentage (A-VSHb%) in uremic patients under hemodialysis (HD). In 17 uremic patients under HD with acetate, blood samples were collected anaerobically ...
Suarez P A - - 1993
Nonneoplastic vascular lesions in the middle ear may be arterial or venous. For the former, ectopic location of the internal carotid artery is the most common; a high jugular bulb is the most common venous abnormality. Both may be clinically misdiagnosed without radiographic studies and, in the event, lead to ...
Winchester D - - 1993
Popliteal venous aneurysms are rarely reported but represent a potentially life-threatening condition requiring accurate diagnosis and surgical resection. Newer techniques including magnetic resonance imaging, computed tomography, and color flow duplex imaging offer new noninvasive methods to define popliteal fossa venous abnormalities. Excision of the aneurysm with venous reconstruction removes the ...
Payne S P - - 1993
In this study, 186 limbs with varicose veins or venous skin changes were examined using duplex ultrasonography. Limbs were classified on the basis of short saphenous or popliteal venous incompetence and the number of limbs with venous ulceration (active or healed) recorded. Short saphenous incompetence did not produce a significant ...
Kaplan H Y - - 1993
The treatment of choice for the avulsed scalp is microvascular replantation. After replantation there are numerous arterial anastomoses, with venous congestion. Usually an effort to establish inflow through two arterial anastomoses is made. We elected to anastomose one artery and multiple veins in each of our patients. We present three ...
Gottlieb L J - - 1993
The radial artery forearm free flap (RAFFF) is a versatile and popular flap used in various reconstructive procedures. This flap contains two venous drainage systems: a superficial (cephalic) route, and a deep (venae comitantes) route. Most surgeons use either the deep venous system alone or in combination with a superficial ...
Patel U - - 1993
Of 220 impotent men studied, 52 demonstrated venous leakage, 85 had arterial insufficiency and 65 showed normal vascular response. Persistent diastolic velocity > 7 cm/s diagnosed venous leakage with a sensitivity of 94% and a specificity of 69%, using cavernosography as the reference standard. Using clinical response as the reference ...
Gan R Z - - 1993
The biophysical approach to the study of blood flow in the pulmonary vasculature requires a detailed description of vascular geometry and branching pattern. The description of the pulmonary venous morphometry in the dog is the focus of this paper. Silicone elastomer casts of a dog lung were made and were ...
Henningfield J E - - 1993
We examined differences between arterial and venous concentrations of nicotine in human subjects. Shortly after smoking a cigarette, levels of nicotine in arterial plasma were more than double those in venous plasma. The time course of the rise in arterial nicotine levels and the magnitude of the arteriovenous difference varied ...
Weiss R A - - 1993
Transmission of high pressure, from deep to superficial venous system of the leg, often causes varicosis of superficial veins. High-pressure transmission frequently occurs through reverse flow or leakage through malfunctioning valves. Therefore, the goal of varicose or telangiectatic vein treatment to stop the leak or reflux at its origin by ...
Grenier N - - 1993
A stenosis of the iliac vein secondary to a fluid collection in a pancreas transplant was identified by color Doppler flow sonography. The pancreatic venous drainage was reversed to the contralateral iliac veins via venous collaterals. After two unsuccessful angioplasties of the vein stenosis, a Wallstent was positioned above the ...
Simões S - - 1993
The middle cranial fossa of 100 cadavers were dissected under stereoscopic loupe in order to identify and systematize the venous vessels located along the lateral margin of the trigeminal cave. The author found that at the sensitive root and trigeminal ganglion level a dural venous canal was present in most ...
Karagöz H Y - - 1993
A patient with venous valve hypoplasia resulting in chronic venous insufficiency is presented and a method of surgical correction by creation of an autogenous femoral vein valve described. A saphenous vein segment was opened posteriorly and inverted cephalad into the common femoral vein to construct a monocuspid vein valve. At ...
Faulk W P - - 1993
The natural anticoagulant pathway involving heparan sulfate proteoglycan and antithrombin III (ATIII) was studied in serial biopsies from 90 cardiac allograft recipients. The ATIII component of this pathway was identified immunocytochemically on venous endothelium and arterial smooth muscle cells and intima of normal donor hearts and stable allografts. Unstable grafts ...
Neglén P - - 1993
Several techniques are currently available for the detection of venous reflux. We have attempted to determine the relative value and accuracy of available techniques to develop a logical strategy of investigation in reflux venous insufficiency. The morphologic distribution of venous incompetence (erect duplex and descending venography); the results of ambulatory ...
Sombolos K - - 1993
In 12 patients who underwent hemodialysis by a dual lumen jugular venous catheter, urea recirculation rate was measured during conventional treatment under normal conditions (R1), as well as when the venous lumen of the catheter was used as arterial lumen and the arterial as venous lumen (R2). Although the mean ...
Sánchez-Olaso A - - 1993
Replantation of small parts often results in failure. The impractical size and the frequent absence of veins suitable for anastomosis, together with venous congestion and thrombosis, are the main problems. A case is described of an amputated nasal tip and successful replantation by means of microsurgical arterial repair and open ...
Liu D - - 1993
To compare arterial, arterialized venous and venous measurements of plasma catecholamines during hypoglycaemia, six healthy men were studied by an iv infusion of insulin (1034 pmol.kg-1.h-1). Arterial blood glucose was clamped at the baseline level for the first 30 min and then reduced to 3.2 and to 2.5 mmol/l for ...
Henderson F C - - 1993
Venous hypertension and stagnant hypoxia in the human spinal cord are poorly understood. We report a case in which a partial Brown-Séquard syndrome resulted from obstruction of venous drainage on one side of the spinal cord. Neurological deterioration and eventual recovery paralleled the formation and clearance of oedema. The clinical ...
< 8 9 10 11 12 13 14 15 16 17 18 >