Guidewire with varying properties
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United States of America Patent
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Jul 2, 2019
Grant Date -
May 19, 2016
app pub date -
Jan 26, 2016
filing date -
Sep 30, 2013
priority date (Note) -
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Abstract
A method of making a core metal element for a medical guidewire including providing a wire of nickel titanium alloy having a length that includes a proximal portion having a first diameter and a distal portion having a second diameter. The method further includes applying cold work to the distal portion and not applying cold work to the proximal portion, thereby imparting to the distal portion a third diameter that is smaller than the second diameter; and then applying a reducing process to the wire whereby the proximal portion is reduced to have a fourth diameter that is less than the first diameter.
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