| 摘要 |
A catheter adapted for heat exchange within a body includes a shaft with at least one input lumen and at least one output lumen in fluid communication with one or more elongate elements which each include a heat transfer lumen. The elongate element is arranged in one or more lengths which include heat transfer lumens being folded into first elongate substantially parallel and juxtaposed portions arranged either in series or parallel or both with adjacent wings. The juxtaposed portions are arranged together in planes extending radially from the center axis of the assembly and are equiangularly placed about that axis. The ends of the portions may be bonded together to create the radial plane. An infusion lumen may extend through the heat transfer assembly with an open end for infusing into the blood stream or sampling therefrom. The efficiency of the heat transfer region is maximized through the elongate thin-walled elements in that surface area is increased and turbulence may be maintained with sufficient input pressure. The employment of the catheter includes its preparation, insertion and expansion with fluid pressure. Additionally, the system may be pressurized to insure turbulent flow through the heat transfer lumens. Use in cardiac surgery and fever control is contemplated with placement of the catheter in the groin, the chest or neck of the patient.
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