Prosthetic vessels for stress at vascular graft anastomoses
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United States of America Patent
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Apr 14, 1992
Issued Date -
N/A
app pub date -
Mar 20, 1990
filing date -
May 25, 1988
priority date (Note) -
Expired
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Abstract
Prosthetic vessels having improved resistance to occlusion by tissue reaction upon implantation by reducing transmural stresses are also disclosed. Prostheses having elliptical cross-sections governed by the maximum strain expected in the natural vessel and possessing a higher bulk compliance than previous designs are provided. Additionally, novel methods are presented for implanting improved prostheses by using angled bias cuts to produce an elliptical cross-section at each end of the natural vessel section receiving the prosthesis. In accordance with preferred embodiments, vessels are provided where the cross-sectional geometry is approximated by the equations: a=r.sub.0 [1+2.epsilon. (2+.epsilon. )].sup.1/2 and b=r.sub.0.
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