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Balloon catheter with distal guide wire lumen

  • US 5,522,818 A
  • Filed: 08/30/1995
  • Issued: 06/04/1996
  • Est. Priority Date: 08/28/1990
  • Status: Expired due to Term
First Claim
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1. A catheter shaft assembly comprising:

  • a first thin-walled, high strength metallic tube structure having a lumen extending therethrough;

    a second tube structure extending distally from the metallic tube, with the second tube structure being more flexible than the metallic tube structure and having a second lumen extending longitudinally therethrough which is in fluid communication with the first lumen;

    a core tube disposed within the second tube and extending from proximate the proximal end of the second tube to a location distal the second tube, the core tube defining guidewire lumen having a proximal end and a distal end, and a guide wire lumen opening at each end of the guidewire lumen; and

    means for preventing significant closure of the second lumen, the means for preventing significant closure being adjacent a distal end of the metallic tube structure when the more flexible second tube structure is bent laterally relative to the metallic tube structure, wherein the means for preventing closure comprises a coil member affixed to the second tube structure adjacent the distal end of the metallic tube structure.

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