A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/126
A61M 25/10 (2006.01) A61M 29/02 (2006.01)
Patent
CA 1336382
Disclosed is a catheter for performing balloon angioplasty, comprising an elongate, flexible catheter shaft having a plurality of lumens therethrough, a plurality of imperforate angioplasty balloons on the shaft, with the interior of each of the balloons connected to a different one of the lumens for separate inflation and deflation, each of the balloons having a predetermined maximum inflated diameter and being formed of non- elastomeric material, the balloons being capable of substantially maintaining the predetermined maximum inflated diameter at inflation pressures of 100 psi, the balloons comprising a first balloon on the catheter shaft near the distal end thereof; and a second balloon on the catheter shaft on top of the first balloon, so that the first balloon is at least partially inside the second balloon, the second balloon having an uninflated thickness, wherein the maximum inflated diameter of the first balloon is less than the maximum inflated diameter of the second balloon, so that the catheter has two different fixed working diameters for dilating stenoses at a single point at the distal end thereof, one of the working diameters corresponding to the maximum inflated diameter of the first balloon plus the uninflated thickness of the second balloon over the first balloon, and the other of the working diameters corresponding to the maximum inflated diameter of the second balloon. Also disclosed are catheters having third and fourth balloons.
546369
Gowling Lafleur Henderson Llp
Jang G. David
LandOfFree
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