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Implantable medical lead with axially oriented coiled wire conductors

  • US 7,761,170 B2
  • Filed: 04/29/2005
  • Issued: 07/20/2010
  • Est. Priority Date: 10/21/2004
  • Status: Active Grant
First Claim
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1. An implantable medical lead for use with an implantable medical device, the lead comprising:

  • a lead body that defines a first center axis;

    multiple conductors located inside the lead body, wherein at least one of the conductors includes a coiled wire defining a lumen with a second center axis substantially parallel to the first center axis of the lead body; and

    an extendable fiber disposed within the lumen defined by the coiled wire, wherein the medical lead has an axial stiffness that permits an axial elongation of approximately ten percent to approximately thirty percent without breakage of the medical lead and wherein the fiber limits the coiled wire to an axial stiffness in a range of approximately 0.105 kg/cm/cm to approximately 0.35 kg/cm/cm.

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