Convertible guidewire-catheter with soft tip
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United States of America Patent
Stats
-
Jan 12, 1993
Grant Date -
N/A
app pub date -
Oct 29, 1990
filing date -
Oct 29, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A convertible wire for use as a guidewire or a catheter in medical applications. The convertible wire comprises a coil spring structure that extends over a proximal portion and a distal tip portion. The spring pitch at the distal tip portion is greater than the spring pitch at the proximal portion to provide greater flexibility at the distal tip portion. A polyimide sheath surround the proximal portion of the spring for increased strength. An outer polytetrafluoroethylene sheath overlies the polyimide sheath and the coil spring in the distal tip portion so the distal tip portion constitutes an atraumatic soft, floppy tip that readily travels through passages in the body.
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