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Reinforced monorail balloon catheter

  • US 20010011180A1
  • Filed: 02/19/2001
  • Published: 08/02/2001
  • Est. Priority Date: 10/24/1996
  • Status: Active Grant
First Claim
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1. A dilatation catheter comprising an elongated catheter shaft having an outer wall and an inner wall, the inner wall surrounding a central lumen, a guide wire tube having an outer surface and an inner surface surrounding a guide wire lumen for receiving a guide wire extending through at least the distal portion of the catheter shaft, with a fluid channel between the outer surface of the guide wire tube and the inner wall of the catheter shaft, a balloon having a distal end and a proximal end, the proximal end being attached to the distal portion of the catheter shaft, and the distal end being attached to the distal portion of the guide wire tube, the fluid channel serving as an inflation/deflation lumen for the balloon, wherein the guide wire lumen has a distal portion of a first diameter and a proximal portion of a second diameter larger than the first diameter, the length of the distal portion and the first diameter being selected such that when a guide wire is within the guide wire lumen, blood is substantially prevented from entering the proximal portion, but a less viscous anticoagulant in the proximal portion can coat the surface of the guide wire within the distal portion of the guide wire lumen.

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