Implantable cardiac pacer with characteristic controllable circu

Details Implantable cardiac pacer with characteristic controllable circu Implantable cardiac pacer with characteristic controllable circu

1974-09-09

1976-03-23

Kamm, William E.

Surgery

Truss

Pad

307223R, 335206, 335306, A61N 136

Patent

active

039453871

ABSTRACT:
An implantable cardiac pacer has a counter for encoding different binary numbers in response to clock pulses applied thereto through an internal clock pulse generating switch that can be activated from outside of the subject's body by application of radiant energy. The binary numbers are decoded with switches that sequentially connect and disconnect circuit elements to control a characteristic of the pacer such as its stimulus pulse width, pulse amplitude, pulse rate and others. The clock pulse switch may be one that is activated with light or pressure but is preferably a magnetic switch system controlled by a shaped magnetic field for preventing inadvertent operation. The encoder counter recycles or resets to its initial value when a predetermined number of clock pulses are applied.

REFERENCES:
patent: 3311111 (1967-03-01), Bowers
patent: 3623486 (1971-11-01), Berkovits
patent: 3631860 (1972-01-01), Lopin
patent: 3639740 (1972-02-01), Escoffier et al.
patent: 3646940 (1972-03-01), Timm et al.
patent: 3672352 (1972-06-01), Summers
patent: 3805796 (1974-04-01), Terry, Jr. et al.
patent: 3830621 (1974-08-01), Miller
patent: 3864173 (1975-02-01), Butschkau

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