Stimulator apparatus for internal body organ

Details Stimulator apparatus for internal body organ Stimulator apparatus for internal body organ

1976-11-15

1978-07-25

Kamm, William E.

Surgery

Truss

Pad

128423R, A61N 132

Patent

active

041023447

ABSTRACT:
An implantable unit for stimulating an internal body organ in which there is a power supply portion for having power induced therein from a source external of the body and electrodes adapted to be attached to a muscular organ such as a bladder or the like, said unit having an energy storage device, such as a capacitor, connected to the electrodes under the control of a transistor which is normally maintained non-conductive as a result of the voltage drop across an impedance connected to the power supply so that each time that the power supply is interrupted, the transistor becomes conductive to discharge the energy storage device through the electrodes and apply a stimulating voltage to the organ. The transmitter source external of the body is designed to periodically interrupt for a short period the voltage transmitted thereby so that the voltage produced by the power supply of the implantable unit is thus periodically interrupted. The sole means for holding the transistor of the implantable unit non-conductive is the impedance connected across the power supply so that as soon as the voltage from the power supply disappears, the transistor becomes conductive. The implantable unit has no internal power supply and its sole source of power is that derived from the transmitter.

REFERENCES:
patent: 3357434 (1967-12-01), Abell
patent: 3662758 (1972-05-01), Glover
patent: 3667477 (1972-06-01), Susset et al.
patent: 3796221 (1974-03-01), Hagfors
Richwien et al., "Medical and Biological Engineering", vol. 4, No. 2, Mar. 1966, pp. 193-195.
Goovaerts et al., "Medical Research Engineering", vol. 10, No. 4, Sep. 1971, pp. 28-30.
Davies, "Journal of the British Institute of Radio Engineers", vol. 24, No. 6, Dec. 1962, pp. 453-456.

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