×

Tandem independently inflatable/deflatable multiple diameter balloon angioplasty catheter systems

  • US 4,990,139 A
  • Filed: 04/25/1990
  • Issued: 02/05/1991
  • Est. Priority Date: 09/10/1986
  • Status: Expired due to Fees
First Claim
Patent Images

1. 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 said shaft, with the interior of each of said balloons in fluid communication with a different one of said lumens for separate inflation and deflation, each of said balloons having a predetermined maximum inflated diameter and being formed of non-elastomeric material, said balloons being capable of substantially maintaining said predetermined maximum inflated diameter at inflation pressures of 100 psi;

    an axial torque guidewire extending through said catheter shaft and out of the distal end of said catheter shaft;

    said balloons comprising;

    a first balloon on said catheter shaft near the distal end thereof; and

    a second balloon on said catheter shaft proximally of and adjacent to said first balloon, wherein the maximum inflated diameter of said first balloon is less than the maximum inflated diameter of said second balloon, wherein the distal end of said first balloon is bonded to said guidewire and the proximal end of said first balloon is bonded to said shaft, said shaft terminating at the proximal end of said first balloon so that when said first balloon is deflated, the distal end of said catheter at said first balloon has a diameter less than the diameter of said shaft, such that when said second balloon is positioned in a stenosis in a branch of the left main artery system, and the first balloon extends into an artery of decreasing diameter, said first balloon does not occlude said artery.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×