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US 7,410,602 B2Granted
High flow rate dialysis catheters and related methods
AssigneeNamic/VA, Inc.
InventorsChristopher T. Davey, Michael R. Sansoucy, Matthew N. McCarthy
Life of this patent
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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.
Claims12
A method of making a catheter comprising:
- extruding a generally elongated conduit wherein the conduit is formed by being pushed through a die at an extrusion rate while being pulled from the die at a pulling rate,
- after the method is completed, the catheter comprising an end product in which the conduit includes an outer wall, the conduit defining at least two lumens, the conduit being formed so that a thickness of the outer wall smoothly increases from a first end to a second end of a transition zone of the conduit and so that a cross-sectional area of each of two of the at least two lumens increases from the first end to the second end of the transition zone, wherein an internal divider is formed so that a thickness of the internal divider increases from the first end to the second end of the transition zone of the conduit.
Dependencies are inferred from the claim text.