Patent ID: 11951035
Assignee: ZOLL CIRCULATION, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 2:
3. A body heat exchange system comprising:
heater/cooler apparatus for alternately warming or cooling a heat exchange fluid for delivery to a body heat exchange device for surface or endovascular heat exchange in or on a body of a subject;
a pump for circulating the heat exchange fluid through the body heat exchange device;
a controller which is programmed to selectively vary both a temperature and a flow rate of the heat exchange fluid to maintain the subject's body temperature at or within a permissible range of a target body temperature,
wherein the controller is programmed such that, after the body temperature of the subject has been warmed or cooled to the target body temperature, the controller will cause the system to maintain said body temperature at or within a permissible variance range of the target temperature by:
holding the temperature of the heat exchange fluid constant and varying the operation of the pump to adjust the flow rate of heat exchange fluid through a catheter as needed to maintain said body temperature at or within a permissible variance range of the target temperature so long as the speed of the pump does not exceed a maximum pump speed; and
if the pump exceeds a target pump speed, adjusting the temperature of the heat exchange fluid such that said body temperature is at or within a permissible variance range of the target temperature without exceeding the maximum pump speed.