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Balloon catheter with distal guide wire lumen

DC
  • US 5,395,334 A
  • Filed: 03/22/1993
  • Issued: 03/07/1995
  • Est. Priority Date: 08/28/1990
  • Status: Expired due to Term
First Claim
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1. In an elongate dilatation catheter of the type that can be slidably moved along a guide wire that can extend past a distal end of the catheter, wherein the guide wire is received in a guide wire lumen of the catheter, the guide wire extending from a distal guide wire lumen opening to a proximal guide wire lumen opening disposed in a portion of the catheter that is spaced distally from a proximal end of the catheter, the dilatation catheter including an inflatable balloon and an inflation lumen extending through the catheter separate from the guide wire lumen, an improvement comprising:

  • a tube formed from a relatively stiff material composition, the tube defining a first shaft section having a proximal end and a distal end;

    a second shaft section disposed distally of the first shaft section, the second shaft section being relatively more flexible than the first shaft section and having the guide wire lumen extending through a portion thereof; and

    a transition section generally disposed between the first shaft section and the second shaft section, the transition section including a portion which is of diminished dimension relative to the tube such that at least the portion of the transition section is more flexible than the first shaft section, less flexible than the second shaft section, and extends at least in part across the proximal guide wire lumen opening.

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