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US 6,280,423 B1Granted
High flow rate dialysis catheters and related methods
AssigneeSciMed Life Systems, Inc.
InventorsChristopher T. Davey, Michael R. Sansoucy, Matthew N. McCarthy
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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.
Claims10
A catheter, comprising:
- (a) a hub;
- and
- (b) a flexible, generally elongated extruded conduit including an outer wall and defining at least two lumens, the conduit comprising:
- (1) a cylindrical proximal section extending from a proximal end coupled to the hub to a first point and having a constant first cross-sectional area along the length of the proximal section;
- (2) a frusto-conical middle section extending from the first point to a second point and having a second cross-sectional area at the second point, wherein the first cross-sectional area is larger than the second cross-sectional area;
- and
- (3) a cylindrical distal section extending from the second point to a distal end and having the second cross-sectional area constantly along the length of the distal section, wherein a thickness of the outer wall smoothly increases in a distal to proximal direction over at least a transition zone of the conduit with a concomitant increase in cross-sectional area in a distal to proximal direction of each of two of the at least two lumens over at least the transition zone.
4 more elements
Dependencies are inferred from the claim text.