There are four zones in a modular operation theater in India Protective Zone: The protective zone in modular operation theater in India is the entrance area for patients, staff, and supplies. Here, normal hospital standards of cleanliness apply and where normal everyday clothes can be worn. Clean Zone: In order to pass between the protective zone and the clean zone, everything must undergo a system of transfer. This is the main area of the department and all patients, staff, and supplies must be clean. A strict cleaning routine applies, and everybody must undergo a complete changing routine to enter. Aseptic Zone: The aseptic zone is the inner area where conditions are as near sterile as possible. It applies to two rooms in each suite: the theatre and the theatre supply room. Most important of all, all staff who might handle exposed instruments must be scrubbed and gowned. Disposable Zone: In the disposable zone, all exposed instruments (used or unused), pathological specimens, lotions, suction jars, and soiled linen are passed from the theatre to a disposal corridor and returned for cleaning, sterilizing, or any other necessary process. Any hospital which has been a large operating department also has a great deal of traffic. So, to preserve the departmental character, a control system must be imposed over all people entering or leaving the hospital.