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Cardiac defibrillation/cardioversion spiral patch electrode

  • US 5,052,407 A
  • Filed: 04/10/1989
  • Issued: 10/01/1991
  • Est. Priority Date: 04/14/1988
  • Status: Expired due to Term
First Claim
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1. A cardiac defibrillation/cardioversion electrode lead device for implantation in the region of the human heart for connection to a defibrillation/cardioversion unit, said device comprising:

  • an elongated tubular body having a distal active region and a proximal lead region, said elongated tubular body being preformed to adopt a planar spiral configuration in its relaxed state;

    a coil coextensive with and contained within said tubular body;

    a conductive discharge surface extending along substantially the entire length of said active region of said tubular body, and occupying only a portion of the surface of said active region, said conductive discharge surface comprising at least one layer of conductive screen wrapped around the length of said active region of said tubular body;

    an insulative surface coextensive with said active region on the remainder of the surface of said active region;

    an insulated conductor means extending within said elongated tubular body having proximal and distal ends, said distal end being connected to said conductive discharge surface;

    connector means attached to the proximal end of said insulated conductor means for electrically connecting said insulated conductor means to said defibrillation/cardioversion unit; and

    an elongated straightening means movable relative to said coil substantially along the entire length thereof for straightening said elongated tubular body for implanting said device proximate the heart, and so that when said straightening means is withdrawn from said coil, said tubular body adopts a planar spiral configuration with said conductive surface on one face thereof and said insulative surface on the opposite face thereof.

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