A system, comprising: a heat exchange catheter line assembly (10 and/or 16, 18) configured to convey working fluid circulating to and from at least one heat exchange element on an intravascular heat exchange catheter; a heat exchange system configured for fluidly communicating with the heat exchange catheter line assembly to exchange heat with the working fluid, the heat exchange system including at least one processor; a near field communication member associated with the heat exchange system; and an NFC element associated with the heat exchange catheter line assembly, wherein the NFC member is configured to provide the processor with a signal representative of whether the NFC member detects the NFC element, operation of the system being established according to one or more of the following: operation being disabled responsive to a determination that a correct NFC element has not been detected by the NFC member, the operation of the system remaining disabled until an authorization key is input to the system; operation being permanently disabled upon determination that the heat exchange catheter line assembly is not an assembly authorized for use with the heat exchange system; operation being disabled only upon a determination that a heat exchange catheter line assembly that is not an assembly authorized for use with the heat exchange system has been attempted for use at least a predetermined number of times greater than one; operation being disabled only upon a determination that a heat exchange catheter line assembly that is not an assembly authorized for use with the heat exchange system has been attempted for use at least a predetermined number of times without an intervening authorized use. a heat exchange catheter line assembly (10 and/or 16, 18) configured to convey working fluid circulating to and from at least one heat exchange element on an intravascular heat exchange catheter; a heat exchange system configured for fluidly communicating with the heat exchange catheter line assembly to exchange heat with the working fluid, the heat exchange system including at least one processor; a near field communication member associated with the heat exchange system; and an NFC element associated with the heat exchange catheter line assembly, wherein the NFC member is configured to provide the processor with a signal representative of whether the NFC member detects the NFC element, operation of the system being established according to one or more of the following: operation being disabled responsive to a determination that a correct NFC element has not been detected by the NFC member, the operation of the system remaining disabled until an authorization key is input to the system; operation being permanently disabled upon determination that the heat exchange catheter line assembly is not an assembly authorized for use with the heat exchange system; operation being disabled only upon a determination that a heat exchange catheter line assembly that is not an assembly authorized for use with the heat exchange system has been attempted for use at least a predetermined number of times greater than one; operation being disabled only upon a determination that a heat exchange catheter line assembly that is not an assembly authorized for use with the heat exchange system has been attempted for use at least a predetermined number of times without an intervening authorized use. operation being disabled responsive to a determination that a correct NFC element has not been detected by the NFC member, the operation of the system remaining disabled until an authorization key is input to the system; operation being permanently disabled upon determination that the heat exchange catheter line assembly is not an assembly authorized for use with the heat exchange system; operation being disabled only upon a determination that a heat exchange catheter line assembly that is not an assembly authorized for use with the heat exchange system has been attempted for use at least a predetermined number of times greater than one; operation being disabled only upon a determination that a heat exchange catheter line assembly that is not an assembly authorized for use with the heat exchange system has been attempted for use at least a predetermined number of times without an intervening authorized use.