Variable stiffness coil for vasoocclusive devices
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United States of America Patent
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-
Dec 2, 2003
Grant Date -
May 2, 2002
app pub date -
Nov 15, 2001
filing date -
Dec 15, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
The variable stiffness vasoocclusive coil is given variable stiffness along the length of the coil by selectively heat treating certain segments of a primary or secondary coil. The primary coil can be selectively heat treated to form soft or deformable segments along the length of the coil, and can then be shaped into a secondary shape that is set by a heat treatment process. Distal regions of the coil can also be heat treated to make the distal ends of the coil softer, more deformable, or less traumatic.
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