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Pacing lead with straight wire conductors

  • US 4,608,986 A
  • Filed: 10/01/1984
  • Issued: 09/02/1986
  • Est. Priority Date: 10/01/1984
  • Status: Expired due to Term
First Claim
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1. A multielectrode pacing lead which is implantable in a heart for long term pacing of the heart, comprising an elongate continuous, solid core lead body which is made of a pliable insulation material, which has a compact cross-section, which has a proximal end and a distal end, and which is multiluminal, having a central lumen adapted to receive a stylet therein and at least four conductor-receiving lumina therein, in planetary arrangement relative to said central lumen, extending the length thereof, a plurality of distal electrodes or sensors at or adjacent said distal end of said lead body, at least one proximal connector at or adjacent said proximal end of said lead body, and at least four uninsulated, relaxed, uncoiled, generally straight wire conductors which are made of an equiatomic alloy of nickel and titanium which, at the temperature of a human body is substantially more flexible and bendable than wire conductors made of other metals, each uninsulated wire conductor having a diameter less than the diameter of said lumen in which it is received, each conductor being loosely and slidably received in said associated lumen, and being connected at each end, respectively, to one of said distal electrodes or sensors and said proximal connector, and said lead body having a diameter no greater than 0.055 inch.

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