Method and apparatus for patient temperature control employing administration of anti-shivering agents
Embodiments of the invention provide a system for temperature control of the human body. The system includes an indwelling catheter with a tip-mounted heat transfer element. The catheter is fluidically coupled to a console that provides a heated or cooled heat transfer working fluid to exchange heat with the heat transfer element, thereby heating or cooling blood. The heated or cooled blood then heats or cools the patient's body or a selected portion thereof. In particular, strategies for providing cooling while reducing shivering are disclosed, including administration of various drugs and drug combinations.
1. A method of changing the temperature of a human body, comprising: inserting a catheter having a heat transfer element into a vein of a patient, said heat transfer element having first and second elongated segments, each segment having a turbulence-inducing irregular exterior surface, and a flexible articulating joint connecting the first and second elongated segments, wherein the first and second elongated, segments comprise alternating clockwise and counter-clock wise invaginations;
circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature different from the patient temperature; and
administering a therapeutic amount of an opioid, whereby shivering is lessened.
2. The method of claim 1 , further comprising circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature higher than the patient temperature.
3. The method of claim 1 , further comprising circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature lower than the patient temperature.
4. The method of claim 1 , wherein the first and second elongated, segments each have an irregular interior surface to induce turbulence within the working fluid.
5. The method of claim 1 , wherein the first and second elongated, segments are formed from highly conductive material.
6. The method of claim 1 , wherein the turbulence-inducing exterior surface is a clot-inhibiting surface.
7. The method of claim 1 , wherein the flexible joint comprises an axially compressible bellows section.
8. A method of changing the temperature of a human body, comprising:
inserting a catheter having a heat transfer element into a vein of a patient, said heat transfer element having a plurality of heat transfer segments, each segment encompassed by a smooth metallic surface, and a flexible articulating joint connecting each of the plurality of heat transfer segments to adjacent heat transfer segments;
circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature different from the patient temperature; and
administering a therapeutic amount of an opioid, whereby shivering is lessened.
9. The method of claim 8 , wherein said flexible articulating joint comprises a bellows.
10. The method of claim 8 , further comprising circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature higher than the patient temperature.
11. The method of claim 8 , further comprising circulating a working fluid through the catheter and the heat transfer element, the working fluid having a temperature lower than the patient temperature.
12. The method of claim 8 , wherein the plurality of heat transfer segments are formed from highly conductive material.
13. The method of claim 8 , wherein the smooth metallic surface is a clot-inhibiting surface.