Compression device having stepper motor controlled valves

Details Compression device having stepper motor controlled valves Compression device having stepper motor controlled valves

1993-07-30

1995-01-24

Wiecking, David A.

Surgery

Instruments

External pressure applicator

606202, 606204, A61B 1712

Patent

active

053838947

ABSTRACT:
A compression device for applying compressive pressures against a patient's limb through means of a flexible, pressurizable sleeve which encloses a limb. The compression device has a pressure control apparatus which includes a microprocessor, a driver circuit and a flow control valve having a stepper motor attached thereto. The microprocessor is programmed to control pressure to the sleeve in conjunction with the driver circuit and the flow control valve by actuating the stepper motor. The microprocessor compares a signal generated by a pressure transducer to a preselected pressure value, it then generates an electrical signal to a driver circuit which in turn sends pulses to the stepper motor to automatically adjust the flow control valve, thus, controlling the flow of fluid therethrough so as to maintain a preselected pressure applied to the limb by the pressure chamber of the sleeve.

REFERENCES:
patent: 4738249 (1988-04-01), Linman et al.
patent: 4770181 (1988-09-01), Tomoda
patent: 4838257 (1989-06-01), Hatch

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