| 摘要 |
TANDEM INDEPENDENTLY INFLATABLE/DEFLATABLE MULTIPLE DIAMETER BALLOON ANGIOPLASTY CATHETER SYSTEM AND METHOD OF USE Disclosed is a catheter for performing balloon angioplasty, which includes an elongate, flexible catheter shaft having a plurality of lumens therethrough: a plurality of imperforate angioplasty balloons physically connected to the shaft, with the interior of each of the balloons in fluid communication with a different one of the lumens for separate inflation and deflation, each of the balloons having an inflatable portion and a predetermined maximum inflated diameter and being formed of nonelastomeric material, the balloons being capable of substantially maintaining the predetermined maximum inflated diameter at inflation pressures of 100 psi; wherein the balloons are characterized by a first balloon on the catheter shaft near the distal end thereof; and a second balloon on the catheter shaft proximally of and adjacent to the first balloon, wherein the maximum inflated diameter of the first balloon is less than the maximum inflated ~iameter of the second balloon; and an attachment site on the catheter shaft to which the proximal end of the first balloon or the distal end of the second balloon or both are attached, wherein a part of the inflatable portion of one of the balloons is permanently located over the attachment site. one end of one of the balloons is preferably joined to the wall of another of the balloons. NAI-2057.A:rdtl 090187 ¢WA-900:cc4/nm5:090986! |
