×

Angioplasty dilating guide wire

  • US 4,846,174 A
  • Filed: 11/13/1987
  • Issued: 07/11/1989
  • Est. Priority Date: 08/08/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. A predilatation catheter for use in angioplasty with a percutaneous transluminal coronary angioplasty (PTCA) catheter of the type having a through lumen and a distal region small enough for insertion in a coronary artery, comprising:

  • an elongate flexible hollow tubular member;

    an elongate core member stiffer than said tubular member and having a diameter less than the inside diameter of said tubular member, said core member positioned inside said tubular member to define an annular inflation passage therebetween;

    means forming an inflatable balloon member adjacent the distal end of said tubular member and in fluid communication with said inflation passage with the distal end of said core member extending through the interior of said balloon;

    means for sealing the distal end of said balloon to the distal end of said core member;

    said tubular member and balloon member having an outside diameter small enough to fit within the through lumen of the PTCA catheter to permit advancing the inflatable balloon member through and beyond the distal end of the PTCA catheter;

    a control member receiving the proximal ends of said tubular member and said core member and having means for fluid communication with said annular passage for inflation and deflation of said balloon; and

    said control member including means for providing limited relative axial motion of said core member relative to said tubular member to effect axial stretching of said balloon and reduction of profile thereof whereby to facilitate withdrawing the balloon back into the distal end of the through lumen of the PTCA catheter.

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