Pacemakers of low weight and method of making such pacemakers

Details Pacemakers of low weight and method of making such pacemakers Pacemakers of low weight and method of making such pacemakers

1976-02-17

1977-08-16

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

040419568

ABSTRACT:
A method of making a pacemaker which includes, in a container a subassembly of, a battery nested in an electrical converter serving to produce heart-pacing pulses. This subassembly is encapsulated in a mold in rigid, polyurethane foam of low weight and capable of protecting the encapsulated components from shock. The body formed by prepotting is generally ellipsoidal and is nested snugly in one of the sections of an ellipsoidal container. Another section of the container is welded to the one section along the congruent rims. Additional potting material is injected through the boards between the sides of the encapsulated body and the adjacent walls of the container. The encapsulated body is held firmly in the container without potting material between the top and bottom and ends of the body and the container. The potting material is injected through the hole in which the electrical feedthrough is subsequently welded. Alternatively, the pacemaker is formed by enclosing the subassembly between the parts of the container, welding the sections of the container, and injecting the foam through the opening in the container through which the output conductor passes.

REFERENCES:
patent: 3382343 (1968-05-01), Muncheryan
patent: 3842842 (1974-10-01), Kenny et al.
patent: 3866616 (1975-02-01), Purdy et al.
patent: 3884243 (1975-05-01), Cywinski
patent: 3888260 (1975-06-01), Fischell
patent: 3943937 (1976-03-01), King et al.

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