Embolic elements and methods and apparatus for their delivery
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United States of America Patent
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Dec 26, 2000
Grant Date -
N/A
app pub date -
Aug 31, 1998
filing date -
Dec 13, 1994
priority date (Note) -
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Abstract
An embolic element comprises a filament composed of a shape memory material having an unexpanded coil configuration and an expanded random matrix configuration. The embolic element may be delivered to a blood vessel treatment site in its coiled configuration over a delivery wire through a guide catheter (44). Usually, the coiled embolic element will be disposed over a helical section of the delivery wire prior to release. In that way, proper positioning of the embolic element is then expanded to its enlarged configuration by heating or otherwise exposing to a temperature over the transition temperature of the shape memory material.
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