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Stretchable stent and delivery system

  • US 8,241,344 B2
  • Filed: 04/08/2008
  • Issued: 08/14/2012
  • Est. Priority Date: 04/09/2007
  • Status: Active Grant
First Claim
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1. A medical device comprising:

  • a tubular implant having a circumference, first and second ends and extending for an initial length L1 along a longitudinal axis; and

    an implant delivery system comprising;

    a catheter having an outer tubular member disposed about an inner tubular member, the first end of the implant operatively secured to the outer tubular member and the second end of the implant operatively secured to the inner tubular member such that changes in the relative positions of the outer tubular member and the inner tubular member change the initial length L1 of the implant to a modified length L2 along the longitudinal axis, L1 being the un-stretched length of the implant, and L2 being the maximum stretched length of the implant; and

    an actuator mechanism movably coupled to one of the outer tubular member and the inner tubular member for changing relative positions of the outer tubular member and the inner tubular member, the relative movement of the outer tubular member and the inner tubular member moving the implant between tensioned and relaxed configurations such that movement of the implant towards the tensioned configuration stretches the implant to the modified length L2 while the circumference of the implant remains substantially unchanged.

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