Temperature management system with assist mode for use with heart-lung machine
First Claim
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1. A system for exchanging heat with primary coolant flowing through a patient-engageable heat exchange element, the system having a nominal low temperature alarm setpoint that is substantially at a low end of a temperature range of mild hypothermia, the system comprising:
- a processor executing logic comprising;
determining that the system is in an assist mode for assisting another component in reducing patient temperature;
receiving a target temperature signal representing a temperature below the nominal low temperature alarm setpoint; and
resetting the low temperature alarm setpoint to be below the target temperature signal responsive to a determination that the system is in the assist mode.
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Abstract
A system and method uses both a heart-lung machine (HLM) and a catheter and/or pad to reach a target temperature for, e.g., cardiac bypass surgery. At or about the target temperature, temperature control of the catheter/pad is suspended and patient temperature controlled using only the HLM.
212 Citations
4 Claims
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1. A system for exchanging heat with primary coolant flowing through a patient-engageable heat exchange element, the system having a nominal low temperature alarm setpoint that is substantially at a low end of a temperature range of mild hypothermia, the system comprising:
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a processor executing logic comprising; determining that the system is in an assist mode for assisting another component in reducing patient temperature; receiving a target temperature signal representing a temperature below the nominal low temperature alarm setpoint; and resetting the low temperature alarm setpoint to be below the target temperature signal responsive to a determination that the system is in the assist mode. - View Dependent Claims (2, 3)
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4. A Method comprising:
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engaging an intravascular heat exchange catheter with the vasculature of a patient receiving treatment from a heart-lung machine; controlling temperature of working fluid through the heat exchange catheter by using a heat exchange system having a low temperature alarm setpoint of around thirty two degrees C.; selecting an assist mode of the heat exchange system wherein the heat exchange system assists the heart-lung machine to reduce patient temperature; receiving a target temperature below the low temperature alarm setpoint; responsive to receiving the target temperature and to a determination that the system is in the “
assist”
mode, resetting the low temperature alarm setpoint to a value below the target temperature.
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Specification