VENOUS BOOT

摘要

This invention is a portable apparatus (50) for applying cyclic pressure to veins within a person's leg by applying cyclic pressure to an outer surface of the leg. The apparatus comprises a first air chamber (40) having a flexible wall portion adapted to be situated adjacent an outer surface of the leg, and a second air chamber (51) adapted to be positioned beneath the person's heel. This second chamber (51) is compressed to force air out of it when the person's heel bears downward thereon, and returnable to its uncompressed state when the downward heel force is removed therefrom. Conduit means (57) for permitting airflow between the first, and second air chambers (51), whereby air flows from the second chamber (51) into the first chamber. Pressure is cyclically increased in the first chamber urging the wall portion against the leg when the person's heel presses downward on the second chamber (51) where air flows from the first to second chamber (51), and pressure on the leg is reduced when the person's heel stops pressing on the second chamber (51).