an *ultrasound technique to look for deep vein *thrombosis. Pressing the vein with the ultrasound probe usually causes it to empty and flatten, which does not occur if there is thrombus in the lumen. See also venography.
A firmly-applied, broad, elastic bandage applied to a limb to prevent the spread of venom injected after certain bites or stings. The pressure is enough to compress veins and lymphatic vessels, but not to cut off arterial supply and so it can remain on indefinitely. The bandage is first applied directlyover the envenomated area, and then extended over the entire limb which is then immobilised in a splint.... compression/immobilisation bandage
(supine hypotension) compression of the aorta and inferior vena cava by a pelvic mass, such as the pregnant uterus, causing maternal hypotension when the woman adopts the supine position. The blood pressure usually returns to normal when the woman is turned onto a left lateral tilt.... aortocaval compression
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