Liquid-circulating thermal therapy system

Details Liquid-circulating thermal therapy system Liquid-circulating thermal therapy system

1985-12-27

1989-07-04

Lastova, MaryAnn

Surgery

Truss

Pad

219297, 219490, 604291, 324105, 324130, A61F 700, H05B 102

Patent

active

048440728

ABSTRACT:
A system for circulating hot or cold liquid through a pad placed in thermal contact with a patient for thermal therapy. The system includes a flexible thermal pad with an internal channel for carrying the liquid and a pump assembly for circulating and optionally heating the liquid. The patient-contacting surface of the pad comprises a foam having a cushioned surface to reduce the risk of ischemia and enhance patient comfort. An open-cell foam structure absorbs and retains moisture for applying moist heat. The system is microprocessor controlled and includes a heater to warm the liquid to a selectable temperature for heat therapy. A display selectively indicates set-point or actual liquid temperature in either .degree. F. or .degree. C. as desired. Safety features include three separate over-temperature sensors, a tilt switch and a float switch which de-energize both the heater and the pump when an abnormal temperature is sensed, the unit is tipped or a low liquid level is sensed, respectively. A sealed membrane switch assembly protects the unit from spills and includes a concealed set-point switch to prevent unauthorized tampering. Set-point may be decremented to a "heater off" position to permit the circulation of unheated liquid. The temperature controller automatically recalibrates itself periodically.

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