Systems and methods for lowering the body temperature of a patient or inducing hypothermia are generally described. In certain embodiments, the core body temperature of a patient can be lowered by using a heat exchanger. In certain embodiments, the heat exchanger of configured to facilitate transfer of heat from an intubation gas to a cooling fluid prior to delivering the intubation gas to the patient (e.g., to the patients lungs). The heat exchanger can be constructed and arranged such that it is located relatively closely to the entrance of the exit opening of the intubation tube used to deliver the intubation gas to the patient, which can ensure that the intubation gas is not excessively re-heated prior to entering the patients body. In some embodiments, the intubation tube used to deliver cooled intubation gas to the patient can include one or more features to facilitate patient cooling or monitoring. For example, the intubation tube may include multiple lumens. In some embodiments, one of the lumens can be used to deliver the intubation gas, while another lumen can be used to deliver a liquid such as a refrigerant. In some embodiments, a sensor may be integrated with the intubation tube, which can be used, for example, to determine a property of the fluid (e.g., temperature and/or pressure) prior to delivery to or while the fluid is in the patient s body. In certain embodiments, the intubation tube can include an atomizer that can be used to atomize a fluid (e.g., a refrigerant) exiting the intubation tube.La présente invention concerne des systèmes et des procédés permettant dabaisser la température corporelle dun patient ou dinduire une hypothermie. Dans certains modes de réalisation, la température corporelle centrale dun patient peut être abaissée au moyen dun échangeur thermique. Dans certains modes de réalisation, ledit échangeur thermique est conçu pour faciliter le transfert de chaleur entre un gaz dintubation et un liquide de refroidissement avant ladm
