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As you know, cryotherapy equipment may use electricity or nitrogen for cooling. Cryomed’s cryosaunas operate on liquid nitrogen, which can cool them down to -130C or -150C within minutes.
Nitrogen is the most abundant element on our planet. The air contains around 78% of nitrogen. Therefore, it is highly available and, in most cases, quite affordable. In the atmosphere, nitrogen exists as a gas. Upon extracting from the air, it is liquefied for long-term storage. Liquid nitrogen has to be stored at -196 °C or lower, otherwise, it evaporates. To ensure such temperatures, liquid nitrogen is pumped for storage into special vacuum-insulated non-pressurized thermal tanks (Dewar tanks) or pressurized containers. It does not stop the evaporation completely but slows it down considerably.
Thanks to its non-explosive and non-toxic nature, liquid nitrogen is safe and convenient to use. The air-nitrogen mix used to cool the cryosauna cabin is the most habitual and natural environment for our body, except for its freezing temperature. While converting gas to a liquid state, nitrogen “accumulates” the cold and then “gives it away” in the cryosauna’s heat exchanger. Any physics teacher would kick you out of the classroom for such an explanation, but it perfectly describes the essence of the process.
With due safety measures, liquid nitrogen is harmless to the human body. At the same time, it is crucial to pay attention to the level of oxygen in the treatment room to prevent its drop below 19%. We recommend installing an oxygen sensor in the cryotherapy premises for higher safety and optimal atmosphere control. Good ventilation is a must as well.
