Using a percutaneous transhepatic technique, blood was obtained from the portal veins of 30 patients with various hepatic disorders and examined for the presence of bacteria and endotoxin. Simultaneous samples also were drawn from hepatic and peripheral veins. In three cases, portal vein cultures grew diphtheroids, which were of doubtful significance, while all hepatic and peripheral cultures w...

BACKGROUND AND OBJECTIVE The objective of this article is to quantify the effect of hyper-osmotic agent (glycerol) on blood velocity in hamster skin blood vessels measured with a dynamic imaging technique, laser speckle contrast imaging (LSCI). STUDY DESIGN/MATERIALS AND METHODS In this study a dorsal skin-flap window was implanted on the hamster skin. The hyper-osmotic drug, that is, glycero...

In the retina, blood flow and neural activity are tightly coupled. Stimulation of the retina with flickering light is accompanied by an increase in blood flow. The current study seeks to investigate whether an increase in oxygen tension modulates flicker (FL)-induced vasodilatation in the human retina. A total of 52 healthy volunteers were included. Via a breathing mask, 100% oxygen (O(2)) was ...

INTRODUCTION We aimed to determine whether levels of thyroglobulin measured in blood from the inferior-superior thyroid veins and the peripheral antecubital vein could predict the presence of thyroid carcinoma in patients undergoing surgery for thyroid diseases. MATERIAL AND METHODS Sixty-one patients were prospectively enrolled in the study. Levels of thyroglobulin were analysed. Sensitivity...

• The contribution of the pulmonary venous system to the pulmonary vascular resistance has been a subject of increasing interest." The pulmonary veins are sometimes considered to consist of wide inactive vessels; however, histological studies have revealed a layer of smooth muscle in these veins, especially at their junction with the left atrium. The veins may also respond histologieally by ven...

A Method for Serial Measurement of Regional Cortical Metabolism and Blood Flow • There is a practical way to measure metabolism, flow, and function in a localized area of brain serially in the same animal. Our preliminary anatomical and angiographical studies have indicated that certain paired cerebral veins drain only blood from cortex supplied by easily identified cerebral arteries. These vei...

Mean arterial pressure (MAP) is surprisingly similar across different species of mammals, and it is, in general, not known which factors determine the arterial pressure level. Mammals often have a pronounced capacity for sustained physical performance. This capacity depends on the vasculature having a flow reserve that comes into play as tissue metabolism increases. We hypothesize that microvas...

the prevalence of varicose veins was studied in 1742 male weavers in iran by completing a specially designed questionnaire and medical examination. to show the effect of occupation on the prevalence of the disease, similar study was conducted on a group of 1661 food- processing workers. the over- all prevalence of the disease in the weavers (26.12%) was significantly higher than the similar rat...