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US 6,554,797 B1Granted
Method and system for patient temperature management and central venous access
AssigneeAlsius Corporation
InventorWilliam J. Worthen
Life of this patent
Estimating the term…
Abstract
A catheter with metal heat exchange elements communicating with a source of coolant in a closed loop for effecting patient temperature control and at least two infusion lumens for providing access to the central venous blood supply when the catheter is placed in the central venous system. An anchor can be provided to suture or tape the catheter to the skin of a patient.
Claims8
A central venous access catheter, comprising:
- first and second elongated segments, each segment having a turbulence-inducing irregular exterior surface;
- a flexible articulating joint connecting the first and second elongated segments;
- a tubular conduit disposed substantially coaxially within the first and second elongated segments, the conduit having a fluid supply lumen for transporting a pressurized working fluid to a distal end of the elongated, articulated segments;
- and
- the catheter also defining at least two infusion lumens separated from the working fluid and terminating in respective ports longitudinally separated from each other, each infusion lumen providing access to the central venous blood supply of a patient when the catheter is placed in the central venous system of a patient.
2 more elements
A central venous catheter, comprising:
- at least first and second hollow metal heat exchange elements, each having an outer surface configured for inducing turbulence in a fluid flowing past the surface;
- at least one closed circuit fluid pathway for conveying coolant to and from the heat exchange elements;
- and
- at least first and second infusion lumens separated from the coolant and terminating in respective ports longitudinally separated from each other, each infusion lumen providing access to the central venous blood supply of a patient when the catheter is placed in the central venous system of a patient.
1 more element
A method for treating a patient, comprising:
- advancing a catheter into the central venous system of the patient;
- circulating a heat exchange fluid through the catheter to exchange heat with the patient;
- and
- simultaneously with the circulating act, undertaking one or more central venous (CV) line functions, wherein the catheter has at least one heat exchange element made of metal and having an exterior surface adapted to create turbulence in blood flowing past the surface.
1 more element
Dependencies are inferred from the claim text.