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A positive Pemberton's sign is indicative of superior vena cava syndrome (SVC), commonly the result of a mass in the mediastinum.Although the sign is most commonly described in patients with substernal goiters where the goiter "corks off" the thoracic inlet, [4] the maneuver is potentially useful in any patient with adenopathy, tumor, or fibrosis involving the mediastinum.
Produces abdominal collateral veins to bypass the blocked inferior vena cava and permit venous return from the legs. Determine the direction of flow in the veins below the umbilicus. After pushing down on the prominent vein, blood will: flow toward the legs → caput medusae; flow toward the head → inferior vena cava obstruction.
The superior vena cava (SVC) is the superior of the two venae cavae, the great venous trunks that return deoxygenated blood from the systemic circulation to the right atrium of the heart. It is a large-diameter (24 mm) short length vein that receives venous return from the upper half of the body, above the diaphragm .
Aortocaval compression syndrome, also known as supine hypotensive syndrome, is compression of the abdominal aorta and inferior vena cava by the gravid uterus when a pregnant woman lies on her back, i.e. in the supine position.
The left superior vena cava is not shown in this image. In anatomy , a persistent left superior vena cava is the most common variation of the thoracic venous system . [ 1 ] [ 2 ] It is present in between 0.3% and 0.5% of the population, [ 3 ] [ 4 ] [ 5 ] and is an embryologic remnant that results from a failure to involute .
Non-developmental syndromes also directly or indirectly affect the Great Cerebral Vein of Galen, although they are extremely rare. These include superior vena cava syndrome (SVCS), and thrombosis of the lateral sinus, superior sagittal sinus, internal jugular vein, or of the Great Cerebral Vein of Galen itself. [citation needed]
Diagram of the human fetal circulatory system. Oxygenated blood from the placenta is carried to the fetus by the umbilical vein, which will drain into the inferior vena cava (IVC) through the ductus venosus or the liver. [ 5 ]
right - superior vena cava, right brachiocephalic vein, and pleura left - left common carotid artery and thymus The thymus typically sits atop the brachiocephalic artery, and it separates the artery from the posterior surface of the manubrium of sternum .