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Prosthetic vascular grafts with a pleated structure

  • US 5,282,847 A
  • Filed: 07/15/1992
  • Issued: 02/01/1994
  • Est. Priority Date: 02/28/1991
  • Status: Expired due to Term
First Claim
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1. A vascular graft comprising:

  • (a) a tubular wall structure having a thickness;

    (b) longitudinally extending pleats on the tubular wall structure, the pleats comprised of a biocompatible polymer capable of responding flexurally to changes in blood pressure by providing the tubular wall structure with a first cross sectional area when maintained at a low normal physiological blood pressure, and a second, greater cross sectional area when maintained at a high normal physiological blood pressure, while maintaining a constant interior wall perimeter for the tubular wall structure and wherein a portion of the pleats are corrugated in the longitudinal direction of the tubular wall structure and wherein two of said corrugated pleats are separated by a cluster of at least three uncorrugated pleats.

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