Angioplasty dilating guide wire

Details Angioplasty dilating guide wire Angioplasty dilating guide wire

A - Human Necessities

61

M

128/126

A61M 29/02 (2006.01) A61M 25/00 (2006.01) G01M 3/26 (2006.01) A61B 17/22 (2006.01)

Patent

CA 1305386

Abstract of the Disclosure A dilating guide wire (12) for use in percutaneous transluminal angioplasty (PTCA) has a very small outside diameter which permits it to be used with a PTCA catheter (100, 101, 105) for treatment of tight stenoses in the coronary arteries that cannot be treated by conventional PTCA catheters alone. The dilating guide wire (12) is small enough to pass through the through lumen (115) of the PTCA catheter and extend beyond the distal tip thereof for predilating the stenosis to permit subsequent crossing and dilation by the PTCA catheter. Means (60, 140) may be provided for selectively imparting an axial force to the balloon (20) of the dilating guide wire to cause axial stretching thereof, thereby reducing its profile and facilitating withdrawal of the balloon of the dilating guide wire back into the PTCA catheter. This may be accomplished through manual actuation of a control knob (65) attached to the core (14), or in another embodiment, automatically through permitted limited movement of the core (132) relative to the outer tubing (130) of the dilating guide wire as the control manifold (140) is moved forward or backward.

582946

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