Operating Room Organization, Proximity, and Spatial Zoning

Factors Determining the Number of Operating Rooms

• The total number of Operating Rooms (ORs) required within a healthcare facility is determined by multiple operational, demographic, and clinical variables:

  • Number of Beds: The overall bed capacity of the hospital or healthcare institution.

  • Number and Length of Operations: The volume of surgical procedures performed alongside the estimated operational duration of each case.

  • Type of Surgeries: The specific complexity, category, and clinical nature of the surgical procedures being performed.

  • Number of Surgeons and Specialities: The total number of active surgical staff members and the diversity of medical specializations requiring OR access.

Strategic Location and Proximity of the Operating Room

• The Operating Room must be strategically situated within the facility to maintain immediate proximity to vital patient care and support service areas.

• Proximity to Patient Care Units: The OR suite should be located adjacent to or near critical patient care zones to facilitate rapid patient transport and continuity of care:

  • Emergency Room (ER): Allows immediate transfer of emergency patients requiring emergency surgical intervention.

  • Intensive Care Unit (ICU): Enables efficient transfer of critically ill patients pre-operatively and post-operatively.

  • Outpatient Surgery: Facilitates seamless workflow and movement for ambulatory/same-day surgical patients.

  • Post-Anesthesia Care Unit (PACU): Ensures immediate and safe transfer of post-operative patients for recovery and monitoring.

  • Pre-Anesthesia Holding: Provides direct physical connection for pre-operative patient preparation before transfer into the surgical suite.

• Proximity to Support Services: The OR must maintain immediate access to essential auxiliary and diagnostic services:

  • Blood Bank: Facilitates rapid access to blood products for emergency trans-operative blood replacement.

  • Pharmacy: Ensures prompt availability of anesthesia medications, critical pharmaceuticals, and IV solutions.

  • Radiology: Provides immediate access to diagnostic intraoperative imaging services.

  • Cath Lab (Catheterization Laboratory): Enables coordination for cardiovascular and interventional procedures.

  • SPD (Sterile Processing Department): Guarantees the timely supply, de-contamination, sterilization, and turnover of surgical instrument sets and equipment.

Spatial Zoning and Environmental Zones of the Operating Room

• To enforce strict infection control and traffic flow management, the OR facility is physically divided into three distinct environmental zones:

  • Unrestricted Area: Access zone where street clothes are permitted; serves as an interface between surgical personnel, non-surgical staff, patients, and incoming workflow.

  • Semi-restricted Area: Intermediate zone requiring designated surgical attire (scrub suit and surgical head coverage); includes support areas, storage rooms for sterile supplies, and corridors leading to restricted suites.

  • Restricted Area: High-level aseptic environment where surgical procedures take place and scrub sinks are located; strict surgical attire is mandatory, including scrub suits, surgical head coverings, and surgical masks.