Cardiac pacer with pre-programmed power source interface means

Details Cardiac pacer with pre-programmed power source interface means Cardiac pacer with pre-programmed power source interface means

1978-02-02

1978-10-17

Kamm, William E.

Surgery

Truss

Pad

128419PS, A61N 136

Patent

active

041203062

ABSTRACT:
A cardiac pacer for providing stimulus signals for pacing a human heart, adapted to utilize a lithium-type battery source having an internal resistance which increases with the energy depletion of such source, and having an interface circuit adapted to transfer power from the lithium-type battery source to the circuitry for providing stimulus signals, which interface circuit provides transfer characteristics which are a programmed function of said lithium source internal resistance.

REFERENCES:
patent: 3646940 (1972-03-01), Timm et al.
patent: 3757793 (1973-09-01), Fester et al.
patent: 3885572 (1975-05-01), Chen
Greatbatch et al., "IEEE Transactions on Bio-Medical Engineering," vol. 18, No. 5, Sep. 1971, pp. 317-323.
Fester et al., "Medical Instrumentation," vol. 7, No. 3, May-Aug. 1973, pp. 172-175.

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