In this paper, new insights in the near infrared imaging process used finger-vein recognition by developing a physical model are presented. A realistic phantom finger that mimics living human and also includes veins has been developed to validate model. NIR images show can emulate optical properties of provide ground truth for locations veins. Through modeling, it is particularly learned that—b...

Spider veins (also known as spider hemangiomas) unlike varicose veins (dilated pre-existing veins) are acquired lesions caused by venous hypertension leading to proliferation of blood vessels in the skin and subcutaneous tissues due to the release of endothelial growth factors causing vascular neogenesis. More than 60% of the patients with spider veins of the legs have significant symptoms incl...

A Cerebral Arteriovenous Malformation is an abnormal connection between arteries and veins. Normally the blood flows from arteries to veins through capillary bed. But patient having AVM, the capillary bed will be absent. The veins cannot handle the pressure of blood flowing from arteries to veins and it ruptures. The success of treatment by embolization in interventional Neuroradiolgy is highly...

OBJECTIVE This study is the first in a series investigating the relationship between autonomic nervous system dysfunction and chronic cerebrospinal venous insufficiency in multiple sclerosis patients. We screened patients for the combined presence of the narrowing of the internal jugular veins and symptoms of autonomic nervous system dysfunction (fatigue, cognitive dysfunction, sleeping disorde...

The goal of this review is to examine the events that led to discovery of blood circulation. The Ancient Greeks, including Hippocrates and Galen viewed the cardiovascular system as comprising two distinct networks of arteries and veins. Galen claimed that the liver produced blood that was then distributed to the body in a centrifugal manner, whereas air or pneuma was absorbed from the lung into...

The circulatory system consists of veins and arteries. Compared with arteries, veins have been neglected in cardiovascular research. Although veins are significantly less muscular than similarly sized arteries, the contribution of veins to cardiovascular homeostasis cannot be left un-noted because veins accommodate 70% of the circulating blood. Circulating blood platelets contain the majority o...

Repeated 24 h blood sampling, which is required for time series analyses of metabolites and/or hormones that show strong fluctuations in blood concentration over time, has a higher failure rate in older adults. We tailored existing venipuncture protocols toward use for 24 h blood sampling (sampling frequency of 10 min) in older adults. The following modifications were made: •Pre-sampling: evide...

Introduction: Pelvic venous insufficiency (PVI) presents a significant clinical challenge due to its high prevalence, severity of manifestations, and risk resulting reproductive disorders. Data suggests that PVI progression in women is accompanied by nonspecific reaction changes. The aim this study was evaluate lipid peroxidation activity antioxidant defense mechanisms ovarian blood patients wi...

BACKGROUND Reduction of blood flow is important in the induction of neurogenic intermittent claudication (NIC) in lumbar spinal canal stenosis. PGE1 improves the mean walking distance in patients with NIC type cauda equina compression. PGE1 derivate might be effective in dilating blood vessels and improving blood flow in nerve roots with chronically compressed cauda equina. The aim of this stud...