Body temperature reduction systems and associated methods

A system for lowering the core body temperature of a subject, comprising:

• a heat exchanger comprising:
• an intubation gas inlet fluidically connected to a source of intubation gas, and
• an intubation gas outlet,
• wherein the heat exchanger is configured to cool intubation gas passing through the heat exchanger;
• and
• an intubation tube fluidically connected to the intubation gas outlet of the heat exchanger and fluidically connected to a source of a coolant having a boiling point of greater than about 37 degrees Celsius, the intubation tube comprising a discharge end configured to eject intubation gas into the airway of the subject.

A system for lowering the core body temperature of a subject, comprising:

• a heat exchanger comprising:
• an intubation gas inlet fluidically connected to a source of intubation gas, and
• an intubation gas outlet,
• wherein the heat exchanger is configured to cool intubation gas passing through the heat exchanger;
• and
• an intubation tube comprising a first lumen fluidically connected to the intubation gas outlet of the heat exchanger, the first lumen comprising:
• a discharge end configured to eject intubation gas into the airway of the subject, and
• a valve positioned at or near the discharge end of the first lumen configured to restrict the flow of fluid from outside the intubation tube into the discharge end of the first lumen and to allow fluid to flow from inside the first lumen out of the discharge end of the first lumen.