Avoiding stress-induced martensitic transformation in nickel titanium alloys used in medical devices
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United States of America Patent
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Apr 23, 2013
Grant Date -
May 12, 2011
app pub date -
Jan 12, 2011
filing date -
Sep 17, 2001
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Abstract
A process for assembling a medical device made from a nickel-titanium alloy for use in a mammalian body while avoiding the formation of stress-induced martensite and a medical device used in combination with a delivery system for deployment into the mammalian body are disclosed. By heating the nickel-titanium alloy of the medical device to a temperature above Md, and deforming and installing the device into a delivery system or holding capsule, it is possible to avoid the formation of stress-induced martensite in the stent, which stays in the austenitic phase throughout.
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