Pediatric cardiac pacer system

Details Pediatric cardiac pacer system Pediatric cardiac pacer system

1976-04-19

1977-03-22

Kamm, William E.

Surgery

Truss

Pad

128404, 128419PS, A61N 136

Patent

active

040130819

ABSTRACT:
An infant grows rapidly enough that the distance between the heart and the location for the implantation of a cardiac pacer can change during the few years between surgical investigations of the implanted apparatus. The lead connecting the pacer with the heart follows a large spiral path around the pacer so that the spiral can tighten to a smaller spiral to accommodate the greater distance between the heart and the pacer as the infant grows. Such spiral portion of the lead is within a plastic bag permitting such contraction of the spiral without the lead adhering to tissue. The association of the plug at the end of the lead with the cylindrical socket in the end face of the pacer helps to direct the lead toward its initial large spiral path. Such socket is encapsulated in a plastic shield at one of the four corners of the two side faces of the pacer. Adequate battery life is achieved by one or more cells having the combination of a lithium anode and thionyl chloride-containing electrolyte. One embodiment of the pediatric pacer has dimensions of about 51 .times. 36 .times. 16 millimeters.

REFERENCES:
patent: 3598128 (1971-08-01), Chardack
patent: 3683933 (1972-08-01), Mansfield
patent: 3913587 (1975-10-01), Newash
patent: 3926198 (1975-12-01), Kolenik

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