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Self-expanding prosthesis having stable axial length

  • US 5,064,435 A
  • Filed: 06/28/1990
  • Issued: 11/12/1991
  • Est. Priority Date: 06/28/1990
  • Status: Expired due to Term
First Claim
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1. A device for fixation in a body cavity, comprising:

  • a stent including generally tubular and coaxial first and second open weave stent segments slidably engaged along respective first and second axially inward portions overlapping one another to form a medial region of the stent, said stent segments further including respective non-overlapping first and second axially outward regions including respective and opposite first and second ends of the stent;

    said stent segments, at least along said axially inward portions, having a predetermined first diameter and a predetermined first axial length, said stent segments being radially compressible to a second diameter less than said first diameter and to a second axial length longer than said first axial length, to facilitate an axial insertion of said stent into a body cavity for delivery to a selected location therealong and subsequent fixation of the stent within the cavity by effecting an engagement of the stent segments with a tissue wall segment defining said body cavity; and

    wherein said first and second axially inward portions slide relative to one another to reduce the axial length of said medial region as said stent segments radially expand into said engagement, thus to maintain a substantially constant axial length of said stent during said radial expansion.

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