Convertible guidewire catheter with soft tip

Details Convertible guidewire catheter with soft tip Convertible guidewire catheter with soft tip

A - Human Necessities

61

M

A61M 25/01 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2094371

A convertible wire for use as a guidewire or a catheter in medical applications, The convertible wire comprises a coil spring structure (21) that extends over a proximal portion (11) and a distal tip portion (13). 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 (30) surrounds the proximal portion of the spring for increased strength. An outer polytetratluoroethylene sheath (40) overlies the po- lyimide 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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