Patent ID: 6066157
Filing Date: 2000-05-23
Classification: A61M

Abstract:
A balloon dilatation catheter comprising:an elongate catheter shaft having an inner tube and a surrounding outer tube, each tube having a distal region and a distal end, the inner tube being of smaller diameter than that of the outer tube and extending distally of the distal end of the outer tube, the inner and outer tubes being movable longitudinally with respect to each other;the inner and outer tubes defining an annular inflation lumen therebetween, the inner tube defining a guidewire lumen therethrough;an inflatable dilatation balloon having a proximal end and a distal end, the proximal end of the balloon being attached to the distal region of the outer tube, the distal end of the balloon being attached to the distal region of the inner tube at a distal connection;the inner tube having an abutment member thereon, and the outer tube having an abutment surface engageable with the abutment member, the abutment member having a transverse dimension large enough tube engaged by the abutment surface of the outer tube, the abutment member being located longitudinally on the inner tube to enable the abutment surface of the outer tube to engage the abutment member to transfer a distally directed longitudinal force applied to the outer tube in a distal direction to the inner tube through the abutment member when the abutment surface of the outer tube is in engagement with the abutment member; andthe annular inflation lumen being in communication with the interior of the balloon to enable the balloon to be inflated and deflated.