System and method for controlling rate of heat exchange with patient
First Claim
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1. A system for changing the temperature of a patient using a catheter implanted in the patient, the system comprising:
- a fluid bath;
a fluid circuit adapted to contain a circulating heat exchange fluid in heat exchange relationship with the fluid bath and the catheter;
a pump operable to circulate the heat exchange fluid in the fluid circuit; and
a controller adapted to control the pump such that circulation of the heat exchange fluid in the fluid circuit is stopped during a change in the temperature of the fluid bath between a first level and a second level when the catheter is implanted in the patient.
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Abstract
A patient control system uses a patient-implanted catheter in thermal communication with a fluid bath via a circulating fluid circuit. A controller automatically controls the temperature of the fluid bath as required for selectively cooling or heating the patient in accordance with patient temperature measurements. The controller thermally decouples the catheter and patient from the fluid bath during changes in fluid bath temperatures in order to overcome the effects of system thermal mass.
236 Citations
13 Claims
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1. A system for changing the temperature of a patient using a catheter implanted in the patient, the system comprising:
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a fluid bath; a fluid circuit adapted to contain a circulating heat exchange fluid in heat exchange relationship with the fluid bath and the catheter; a pump operable to circulate the heat exchange fluid in the fluid circuit; and a controller adapted to control the pump such that circulation of the heat exchange fluid in the fluid circuit is stopped during a change in the temperature of the fluid bath between a first level and a second level when the catheter is implanted in the patient. - View Dependent Claims (2, 3)
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4. A system for changing the temperature of a patient using a catheter implanted in the patient, the system comprising:
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a thermal exchange device; a fluid circuit adapted to contain a circulating heat exchange fluid in heat exchange relationship with the thermal exchange device and the catheter; and a controller adapted to thermally decouple the catheter from the thermal exchange device by stopping the circulation of the heat exchange fluid in the fluid circuit during a change in the temperature of the thermal exchange device between a first level and a second level when the catheter is implanted in the patient. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for changing the temperature of a patient using a catheter implanted in the patient, the system comprising:
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heating and/or cooling means; means for transferring heat between the heating and/or cooling means and the catheter; and means for thermally decoupling the catheter from the heating and/or cooling means by stopping the circulation of the heating and/or cooling means during a change in the temperature of the heating and/or cooling means between a first level and a second level when the catheter is implanted in the patient.
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Specification