Electrical stimulator for biological tissue utilizing output cur

Details Electrical stimulator for biological tissue utilizing output cur Electrical stimulator for biological tissue utilizing output cur

1985-06-17

1987-11-17

Kamm, William E.

Surgery

Truss

Pad

128421, 128908, A61N 136

Patent

active

047066741

ABSTRACT:
An electrical stimulator for biological tissue utilizing an output current monitor. A drive circuit supplies a transformer output stage with the secondary winding of the transformer coupled across the electrode adapted to be connected to biological tissue. A current monitor and a reference impedance, being substantially greater than the load impedance, are coupled in series with each other and in parallel with the secondary winding and the electrode. In one embodiment, an additional current monitor is coupled in conjunction with the primary winding of the transformer and a comparator is used to compare currents measured by both current monitors.

REFERENCES:
patent: 321839A1 (1983-06-01), DEX
patent: 4068669 (1978-01-01), Niemi
patent: 4088141 (1978-05-01), Niemi
patent: 4237899 (1980-12-01), Hagfors et al.
patent: 4256116 (1981-03-01), Meretsky et al.
patent: 4431000 (1984-02-01), Butler et al.
patent: 4476869 (1984-10-01), Bihn
Buckett et al, "A Flexible Portable Functional Electrical Stimulation System, 36th ACEMB, Sep. 12-14, 1983, p. 39.
Hogan, "Neuromuscular Stimulator Permits Customized Therapy", Design News, pp. 108-110, Sep. 17, 1984.
Hogan, "TENS Unit Modulates Output to Evade Body's Adaptive Capability", Design News, Sep. 17, 1984, pp. 114-115.

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