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Removable endocardial lead

  • US 5,231,996 A
  • Filed: 01/28/1992
  • Issued: 08/03/1993
  • Est. Priority Date: 01/28/1992
  • Status: Expired due to Fees
First Claim
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1. In an elongated electrical medical lead for use with a pulse generator to be implanted within a human body,(a) said lead having a proximal and distal lead end and further comprising:

  • (1) an outer insulating sheath having a relaxed predetermined sheath length between a proximal and distal sheath end thereof, said sheath being capable of lengthening under tension;

    (2) at least one conductor positioned within said outer insulating sheath and extending between said proximal and distal sheath ends thereof, each of said at least one conductor having a relaxed predetermined conductor length between a proximal and distal conductor end thereof, and each of said at least one conductor being capable of lengthening under tension;

    (3) a connector interconnecting said proximal sheath end with said proximal conductor end of each of said at least one conductor therein, said connector for providing an electrical connection to said implanted pulse generator;

    (4) at least one tip electrode disposed adjacent said distal sheath end of said lead, each of said at least one electrode having a normally electrically insulated shank portion and an exposed electrode surface; and

    (5) means for electrically and mechanically connecting said distal conductor end of each of said at least one conductor to said electrically insulated shank portion of said electrode;

    (b) wherein the improvement in said lead body construction comprises;

    lead body strengthening means permanently attached at said proximal and distal lead ends and extending therebetween for allowing said lead body insulating sheath and each of said at least one conductor to be stretched only to an extended predetermined length exceeding said relaxed predetermined length as long as applied tension does not exceed the tensile strength of said lead body strengthening means.

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