Back to results
US 5,282,847 AGranted
Prosthetic vascular grafts with a pleated structure
AssigneeMedtronic, Inc.
InventorsPaul V. Trescony, Michael Wolf, Richard L. Molacek, Elaine Lindell
Life of this patent
Estimating the term…
Abstract
A vascular graft having a pleated circumference accommodates blood pressure changes with minimal change in internal surface area. A highly compliant graft may be made from a wide variety of polymers including non-elastomeric materials.
Claims6
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.
Dependencies are inferred from the claim text.