Low profile catheter and guidewire

Details Low profile catheter and guidewire Low profile catheter and guidewire

A - Human Necessities

61

M

A61M 25/00 (2006.01) A61M 29/00 (2006.01) A61M 29/02 (2006.01)

Patent

CA 2091779

2091779 9204931 PCTABS00011 A low profile catheter for increasing lumen size of a blood vessel includes a catheter shaft (12) which carries an inflatable balloon (20), at its distal end (16). A guide wire (30) is positioned in the catheter shaft (12) to extend beyond the balloon (20), and the guide wire (30) defines a keyed portion (38) having a cross-sectional shape which is other than round. A keyed coupling member is carried in the catheter shaft (12) and coupled to the keyed portion (38) of the guide wire to transmit torque from the catheter shaft (12) to the guide wire (30) while permitting relative axial movement between the catheter shaft (12) and the guide wire (30). Alternatively, wound coil springs (124, 126) are mounted to the catheter shaft by a spyder (116). The coil springs (124, 126) seize the guide wire (30) in response to rotation, but allow longitudinal movement of the guide wire (30) in the absence of rotation.

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