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Angioplasty dilatation balloon catheter/guidewire system

  • US 5,192,295 A
  • Filed: 06/20/1990
  • Issued: 03/09/1993
  • Est. Priority Date: 06/20/1990
  • Status: Expired due to Term
First Claim
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1. A dilatation balloon catheter/guidewire system, comprising:

  • an outer member comprising a tubular catheter shaft and a balloon secured to the distal end of said tubular catheter shaft;

    an inner tubular member extending through said balloon and secured to said outer member proximally and distally relative to said balloon; and

    a guidewire extending through said tubular catheter shaft and said inner tubular member, said guidewire containing at least a first section and a second section proximal to, and of larger diameter than, said first section;

    said inner tubular member being;

    non-axially-collapsible and thereby maintaining said balloon in an axially extended condition, andresiliently radially expandable from a reduced-diameter condition sufficiently wide to receive said first section of said guidewire but not said second section, to an expanded-diameter condition sufficiently wide to receive said second section.

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