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Apparatus and method for expanding a stimulation lead body in situ

  • US 20040186543A1
  • Filed: 01/27/2004
  • Published: 09/23/2004
  • Est. Priority Date: 04/30/1998
  • Status: Active Grant
First Claim
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1. An implantable medical device for providing therapy to a body comprising:

  • an elongate central portion;

    at least one extendable member having a tip, the extendable member depending from the central portion and being adapted to assume a range of positions, including a compact position, in which the tip is disposed in close proximity to the central portion, and an extended position, in which the tip is disposed at a location distal from the central portion;

    at least one therapy element disposed on the extendable member for delivering therapy to the body;

    a linkage assembly for position adjustment of the extendable member in situ, the linkage assembly comprising a series of struts that are pivotally linked to one another at a first point and second point, the first point and the second point adapted to move towards each other to compact the extendable member, and away from one another to expand the extendable member;

    wherein the extendable member is a span having a first end and a second end that are fastened to the linkage assembly at the first point and the second point respectively, the span adapted to contract between the first point and the second point when the first point and second point are moved towards each other, and expand between the first point and the second point when the first point and the second point are moved away from each other.

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