×

Double lumen tubing design for catheter

  • US 5,795,326 A
  • Filed: 01/29/1997
  • Issued: 08/18/1998
  • Est. Priority Date: 01/29/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A double lumen tubing adapted for use as a catheter, said double lumen tubing comprising:

  • a tubular wall comprising an exterior surface and an interior surface, said interior surface having a circular cross-section located about a longitudinal central axis which defines a tubular conduit, said interior surface comprising a first lumen portion located along a first lumen radius measured from said longitudinal central axis and a second lumen portion located along a second lumen radius measured from said longitudinal central axis;

    a lumen wall extending parallel to said longitudinal central axis and extending transversely across said tubular conduit between spaced locations on said interior surface, said lumen wall comprising a first surface which, when combined with said first lumen portion of said interior surface, defines a first lumen, said first lumen having a cross-sectional area, said lumen wall further comprising a second surface which, when combined with said second lumen portion of said interior surface, defines a second lumen, said second lumen having a cross-sectional area, wherein the cross-sectional areas of said first and second lumens are substantially equal, said first surface of said lumen wall having a first lumen central arcuate portion and two first lumen wing portions located on opposite sides of said first lumen central arcuate portion, said second surface of said lumen wall having a second lumen central arcuate portion and two second lumen wing portions located on opposite sides of said second lumen arcuate portion, wherein said second lumen arcuate portion is in the shape of a circular arc which is concentric with said first lumen arcuate portion and which has a radius that is from 50 to 60 percent of the radius of said second lumen portion of said interior surface to thereby form a circular guide wire zone in said second lumen which has a radius of from 50 to 60 percent of the radius of said second lumen portion and which is bordered on one side by said second lumen arcuate portion and bordered on the other side by said second lumen portion of said interior surface.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×