Prevention of Deep- Vein Thrombosis Due to Stasis

Deep-vein thrombosis due to stasis in the lower extremities commonly occurs in surgery or during prolonged periods of bed rest. A system to prevent stasis was developed and consists of a three-compartment pressure cuff, a pneumatic source, and an electronic controller. The cuff is designed to be placed on the lower extremities over the calf. Each section of the cuff is sequentially and intermittently compressed. The sequential action for this compression is developed by an electronic controller that regulates pressure, periodicity, and duration of compression. Results show that a pressure wave can be developed that squeezes and propels the blood anteriorly through the venous system, and when the pressure is released the venous system refills.