Mechanical properties of explanted porcine bioprosthetic heart valves

Author

Barber, J.E. ; Ratliff, N.B. ; Vesely, I.

Author_Institution

Lerner Res. Inst., Cleveland Clinic Found., OH, USA

Volume

1

fYear

1999

fDate

1999

Abstract

Bioprosthetic heart valves used to replace both the mitral and aortic valves in humans have a life span of 10-15 years. We performed uniaxial tensile tests on explanted failed porcine bioprostheses that came from both the mitral and aortic position and freshly fixed porcine aortic valves (PAV). The results showed that the explants had significantly different mechanical properties from the freshly fixed PAV. Comparison of explants from the mitral and aortic positions revealed no differences. The changes measured in the bioprostheses indicate that they have lost some of their elasticity as well as their ultimate strength

Keywords

biological tissues; biomechanics; cardiology; elasticity; impact strength; prosthetics; yield strength; aortic valves; bioprosthetic heart valves; elasticity; explanted porcine; extensibility; failed porcine bioprostheses; failure strain; material degeneration; mechanical properties; mitral valves; stiffness; ultimate strength; uniaxial tensile tests; Biomedical engineering; Capacitive sensors; Elasticity; Heart valves; Humans; Materials testing; Mechanical factors; Niobium; Performance evaluation; Strain measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint

Conference_Location

Atlanta, GA

ISSN

1094-687X

Print_ISBN

0-7803-5674-8

Type

conf

DOI

10.1109/IEMBS.1999.802219

Filename

802219