Pre-stressing devices incorporating materials subject to stress softening
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United States of America Patent
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Sep 11, 2001
Grant Date -
N/A
app pub date -
Mar 10, 1999
filing date -
Mar 10, 1999
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Abstract
A method and apparatus for pre-stressing devices incorporating materials subject to stress softening is disclosed, as well as the resulting device. The method includes fabricating a heart valve with an inflow side and an outflow side. At least a portion of the heart valve includes a material subject to stress softening. The material experiences stress when a pressure differential occurs between the inflow side and the outflow side of the valve. The method includes creating a stress in the material prior to implantation in order to stabilize the stress/strain response of the material prior to implantation.
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