Double lumen tubing design for catheter
First Claim
1. A double lumen tubing adapted for use as a catheter, the double lumen tubing comprising:
- a tubular wall having an exterior surface located about a longitudinal central axis and an interior surface, the interior surface cross-section being defined by a circular first lumen portion located along a first lumen radius about a first longitudinal axis and a circular second lumen portion located along a second lumen radius about a second longitudinal axis; and
a lumen wall extending longitudinally parallel to the central axis and extending transversely across the tubular conduit between spaced locations on the interior surface, the lumen wall comprising a central arcuate portion and having a first surface which, with the first lumen portion of the interior surface, borders a first lumen, the first lumen having a cross-sectional area, the lumen wall further comprising a second surface opposite the first surface which, with the second lumen portion of the interior surface, borders a second lumen, the second lumen having a cross-sectional area, the first surface of the lumen wall having a central convex arcuate portion and adjacent wing portions extending in opposite directions to the tubular wall, the second surface of the lumen wall having a central concave arcuate portion and adjacent wing portions extending in opposite directions to the tubular wall, wherein the concave arcuate portion is in the shape of a circular arc which has a radius that is from 50 to 90 percent of the radius of the second lumen portion of the interior surface, and wherein a circular primary guidewire region is formed in the second lumen bordered on one side by the concave arcuate portion and on the other side by the second lumen portion, the primary guidewire region having a radius of from 50 to 70 percent of the radius of the second lumen portion.
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Accused Products
Abstract
A double lumen tubing which is adapted for use as a catheter. The tubing accommodates multiple sized guidewires and has increased resistance to kinking. A lumen wall divides the outer tubular wall into the two lumens and has a central arcuate portion shaped to allow insertion of relatively large guidewires through one of the lumens, while still leaving space for smaller guidewires through the other lumen. Resistance to kinking is increased by varying internal diameters or axes of the interior lumen walls to increase the wall thickness of the tubing in selected areas, and by varying the thickness of the wall that divides both lumens in the middle or where the dividing wall meets the outer tubular wall.
126 Citations
21 Claims
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1. A double lumen tubing adapted for use as a catheter, the double lumen tubing comprising:
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a tubular wall having an exterior surface located about a longitudinal central axis and an interior surface, the interior surface cross-section being defined by a circular first lumen portion located along a first lumen radius about a first longitudinal axis and a circular second lumen portion located along a second lumen radius about a second longitudinal axis; and a lumen wall extending longitudinally parallel to the central axis and extending transversely across the tubular conduit between spaced locations on the interior surface, the lumen wall comprising a central arcuate portion and having a first surface which, with the first lumen portion of the interior surface, borders a first lumen, the first lumen having a cross-sectional area, the lumen wall further comprising a second surface opposite the first surface which, with the second lumen portion of the interior surface, borders a second lumen, the second lumen having a cross-sectional area, the first surface of the lumen wall having a central convex arcuate portion and adjacent wing portions extending in opposite directions to the tubular wall, the second surface of the lumen wall having a central concave arcuate portion and adjacent wing portions extending in opposite directions to the tubular wall, wherein the concave arcuate portion is in the shape of a circular arc which has a radius that is from 50 to 90 percent of the radius of the second lumen portion of the interior surface, and wherein a circular primary guidewire region is formed in the second lumen bordered on one side by the concave arcuate portion and on the other side by the second lumen portion, the primary guidewire region having a radius of from 50 to 70 percent of the radius of the second lumen portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification