This is a stainless steel patient transfer unit that is designed to separate clean and non-clean zones. With the OPT/GAMMA patient Transfer Unit it is possible to have a fixed or a mobile system depending on the need of the location it will be installed. When installed it permits the entry/exit of patients to/from the operating theatres. This entire process is kept clean and free from chaos because those that are not to be in the area are not introduced into it. The system works by being placed in a wall with established parameters about the non-clean and disinfested zones and their respective locations. Two manual 12 V push buttons control the system and it can cater to an area of 2.3x2.6 mts. The manual buttons are divided between the non-clean and clean areas. There is a rotating carpet. The 220 V electrical system complies with I.E.C. Standards.