High flow rate dialysis catheters and related methods
First Claim
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1. A catheter comprising:
- a hub; and
a flexible conduit comprising an outer wall and an internal divider defining at least a first and second lumen, the conduit further comprising;
a cylindrical proximal section;
a frusto-conical middle section; and
a cylindrical distal section;
wherein the frusto-conical middle section includes a transition zone extending from a first point to a second point and having a first cross-sectional area at the first point and a second cross-sectional area at the second point, wherein the first point is proximal of the second point, and wherein the first cross-sectional area is larger than the second cross-sectional area;
wherein a thickness of the outer wall smoothly increases in a distal to proximal direction over the transition zone with a concomitant increase in cross-sectional area in a distal to proximal direction of each of the first and second lumens over the transition zone, andwherein the cylindrical proximal section is in direct contact with the hub.
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Abstract
High flow rate catheters, and related methods, are useful in dialysis and other procedures. A catheter according to the invention comprises a hub and a generally elongated conduit. The conduit has a substantially continuous and smooth wall. The conduit also defines at least one lumen and has a length extending from a proximal end to a distal end of the conduit. The proximal end is coupled to a hub and the distal end has an opening in communication with the lumen. The conduit has a conical shape which tapers along the length.
154 Citations
28 Claims
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1. A catheter comprising:
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a hub; and a flexible conduit comprising an outer wall and an internal divider defining at least a first and second lumen, the conduit further comprising; a cylindrical proximal section; a frusto-conical middle section; and a cylindrical distal section; wherein the frusto-conical middle section includes a transition zone extending from a first point to a second point and having a first cross-sectional area at the first point and a second cross-sectional area at the second point, wherein the first point is proximal of the second point, and wherein the first cross-sectional area is larger than the second cross-sectional area; wherein a thickness of the outer wall smoothly increases in a distal to proximal direction over the transition zone with a concomitant increase in cross-sectional area in a distal to proximal direction of each of the first and second lumens over the transition zone, and wherein the cylindrical proximal section is in direct contact with the hub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A catheter comprising:
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a hub; and a flexible conduit comprising an outer wall and a septum defining at least a first and second lumen, the conduit further comprising; a cylindrical proximal section; a frusto-conical section; and a cylindrical distal section; wherein the frusto-conical section includes a transition zone extending from a first point to a second point and having a first cross-sectional area at the first point and a second cross-sectional area at the second point, wherein the first point is proximal of the second point, and wherein the first cross-sectional area is larger than the second cross-sectional area; wherein a thickness of the outer wall and the septum smoothly increases in a distal to proximal direction over the transition zone with a concomitant increase in cross-sectional area in a distal to proximal direction of each of the first and second lumens over the transition zone; and at least one connecting tube to the hub, whereby the at least one connecting tube is in communication with at least one of the lumens; and wherein the proximate end of the cylindrical proximal section is adjoined directly to the hub. - View Dependent Claims (27, 28)
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Specification