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Balloon catheter with distal guide wire lumen

DC
  • US 5,217,482 A
  • Filed: 11/15/1991
  • Issued: 06/08/1993
  • Est. Priority Date: 08/28/1990
  • Status: Expired due to Term
First Claim
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1. A balloon dilatation catheter comprising:

  • a metallic tube defining a first shaft section having a proximal end and a distal end;

    a second shaft section, more flexible than the first shaft section, disposed distally of the first shaft section;

    the first and second shaft sections having an inflation lumen defined therethrough;

    a dilatation balloon attached to the distal end of the second shaft section, the dilatation balloon being in fluid communication with the inflation lumen such that inflation pressure may be provided to the balloon therethrough;

    an intermediate section disposed between the first shaft section and the second shaft section, the intermediate section configured to have a stiffness between the stiffness of the first shaft section and the stiffness of the second shaft section; and

    a guide wire tube extending through the interior of the balloon, the guide wire tube defining a second and shorter lumen than the inflation lumen, the second lumen having a proximal guide wire opening at its proximal end and a distal guide wire opening at its distal end, the proximal guide wire opening being disposed along the intermediate section between the first and second shaft sections and the second lumen being formed and aligned to receive a guide wire therein such that the catheter may be slidably moved on the guide wire.

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