The successful treatment for edema of the finger is difficult after reconstructive surgery, especially replantation of the digits. However, many previous studies showed that external intermittent compression of the calves is an effective and practical physical means to prevent deep vein thrombosis and edema.Thus we designed a new sequential pneumatic compression device which consists of aquarium air pumps, solenoid valves, twin timers, self hold relays and multiple air chambers (neonatal blood pressure cuffs). It can produce the pressure of air chambers ; 17〜112mmHg, compression time ; 1〜60sec., relaxation time ; 1〜60sec. (a wave-like milking action).The simple and compact milking apparatus was improved by using a single chip microcomputer instead of twin timers.The application of this equipment appears to give significant protection against edema and circulatory disturbances in surgical patients.
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