Abstract: The present application relates to methods to administer to a patient a hypothermal inhalation gas composition that includes oxygen and a mixture of inert gases. The mixture of inert gases includes a first compound selected from xenon and argon, and a second compound having hypothermal properties, such as helium. In the methods, a gas composition including oxygen and a mixture of inert gases is selected and the gas composition is administered to the patient at an inhalation temperature of a specified range such that the body temperature of the patient is maintained within a specified temperature range.

Abstract: The present invention relates to an inhalation gas composition comprising oxygen and a mixture of inert gases, characterized in that the mixture of inert gases comprises a first compound selected from xenon and argon having hyperthermal properties, and a second compound having hypothermal properties, the mixture of inert gases comprising such a proportion of the first and second compounds that the mixture of inert gases is thermally neutral.

Abstract: A method for determining gases proportions to obtain an inhalable medical gaseous composition consisting of a first noble gas, a second noble gas, and oxygen, in order to reach a body temperature value, including determining a proportion of first or second noble gas depending on predetermined parameters, such as the body temperature value and an inhalation temperature value, the determining further including determining, for the inhalation temperature value, two body temperature theoretical values for the first and second noble gas modeled by reference regression lines, calculating a difference between both body temperature theoretical values, calculating a difference between body temperature value and any one of the body temperature theoretical values, calculating a ratio representing proportion of first or second noble gas in the inhalable medical gaseous composition.