Coaxial ptca catheter with anchor joint

A - Human Necessities – 61 – M

Patent

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128/127.1

A61M 25/10 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2019926

BO410/7107 AZB/dmc 08/18/89 0772b/9b COAXIAL PTCA CATHETER WITH ANCHOR JOINT ABSTRACT OF THE DISCLOSURE A balloon dilatation catheter used for percutaneous transluminal coronary angioplasty includes a coaxial construction of an inner tube and an outer tube. The inner tube extends distally beyond the distal end of the outer tube. A dilatation balloon is mounted on the distal end of the catheter end is connected at its proximal end to the distal end of the outer tube and at its distal end to the distal end of the inner tube. The lumen of the inner tube is adapted to receive a guidewire and may permit pressure monitoring and liquid infusion. The annular inflation lumen is defined between the inner and outer tubes. The distal end of the outer tube extends into the balloon and is anchored directly to the inner tube. The balloon may be inflated and deflated through an annular inflation lumen defined between the inner and outer tubes, there being openings in the outer tube within the balloon to communicate the inflation lumen with the interior of the balloon. The catheter displays increased column strength and resistance to axial buckling and balloon bunching by reason of the secure connection between the distal end of the outer tube and the inner tube.

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