Apparatus for sensing and recording biopotential electrical sign

Details Apparatus for sensing and recording biopotential electrical sign Apparatus for sensing and recording biopotential electrical sign

1984-02-02

1985-12-31

Cohen, Lee S.

Surgery

Truss

Pad

128745, 128734, A61B 504

Patent

active

045614482

ABSTRACT:
Electrodes located at predetermined locations about a patient's eye sense electrical signals indicative of eye movement. The sensed signals are coupled to amplification circuitry operated from a battery power supply. The battery power supply and battery operated amplification circuitry have a floating common reference to reject electromagnetic interference. An optocoupler isolates the battery operated circuitry and the patient from non-battery operated circuitry which provides a signal representative of the sensed signal to drive a recording pen of a chart recorder. Corrective compensation responsive to variations in the sensed signal caused by electrode to skin surface contact changes and circuit changes maintains a zero central fixation reference potential.

REFERENCES:
patent: 3217706 (1965-11-01), Sullivan
patent: 3946723 (1976-03-01), Servos
patent: 4155352 (1979-05-01), Toglia
patent: 4320768 (1982-03-01), Ledley et al.
patent: 4474186 (1984-10-01), Ledley et al.

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