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Cryogenic chambers differ in size, number of rooms and above all in a kind of refrigerant used.  Because of the way of cooling, we distinguish the following types of cryochamber:

 - Cryochamber supplied with liquid nitrogen;

Cryochamber consists of two rooms: a pre-chamber and a main chamber that is used for  treatments.  The pre-chamber of the temperature - 60 degrees C. is at the same time zone where a patient adapts to low temperatures and the barrier for cold air, which escapes outside from a room.  In the main chamber can be set the range of temperatures from -80 degrees C. to -170 ° deg. C.
Duration of procedure ranges from 2-3 minutes. The source of heat exchangers are cold and into the main chamber is placed dried and purified air breathing.  Automatic control ensures patient safety.

 - Cryochamber supplied with liquid synthetic air (mixture of liquid nitrogen and oxygen);

As for the construction and therapeutic possibilities - very similar to a chamber supplied with liquid nitrogen;  different refrigerant consumption, the complexity of maintenance and individual technical solutions;

 - Chamber cooled by cooling units;

May consist of one, two or three rooms: one - two preliminary and one main cryochamber.
The pre-chamber is also a zone, where patient adapts to low temperatures  and the barrier for escaping cold air from a room.  The source of cool  is cooling unit, which chills air in the cold zone into range of temperatures - 100 - -130 ° C and  operates in a similar way as a refrigerator.
The advantages of this solution is no gas tank, so it is a big saving on the purchase refrigerant.  The downside is the relatively high cost of the chamber and long time to wait for cooling air to the desired temperature.

 On the market there are also the other types of cryochambers with different construction:

 - Cryochamber using the phenomenon of coolness retention and direct injection of liquid air;

The factor is a cryogenic liquid synthetic air. The chamber is located 1.70 m below the floor level.  Stairs lead to the niche, which is a kind of adaptive zone.  As the heavier cold air remains in the niche without loss, when entering and exiting from it. The temperature in the niche in the adaptation area  is 70 ° C.  The patient goes into the main chamber, where through the direct liquid air injection is possible to set up by staff  any therapeutic temperature.  Temperature range for use in therapeutic chamber ranges from -110 deg. C to -160 deg. C. The disadvantage of that solution is that it makes it much harder to make this procedure for people using wheelchairs or with high motor dysfunction.  The advantage is the relatively low price.

 - Single cryochamber commonly called cryosauna;

Much cheaper to buy and operate than conventional cryochamber;
However, you can not count in this case the refund the procedures by the polish NFZ (National Health Found), which does not recognize that cryosauna is a medical device.  Since the cryosauna  as refrigerant used only nitrogen, this method of treatment raises many controversies. Definitely the most important difference between the cryogenic chamber and cryosauna is  a quality of treatments and safety of patients. 
In case of a cryochamber it is provided exposure of entire body to the low temperature. As far cryosauna, it concerns only lower part of body (in case of cryosauna the upper parts of body -  head, shoulders, arms - where is the highest density of thermoreceptors -  are not subjected to cold treatment); the distribution of the low temperature is uneven and unstable.  The patient is also exposed to inhalation of fumes of nitrogen, which can be not indifferent to the health.

 Prepared by: Zbigniew Famuła

 Sources:
 SPA-Manager magazine (2008)
 www.fizjo.pl
 www.medsport.pl No 153/2004 author: Arthur Warzocha
 www.kriosystem.com.pl