What Is a Three-Color Operating Room Door Indicator Light?

The three-color operating room door indicator light is an essential component in hospitals and surgical centers. It is used to display the current status of the operating room. Usually installed above the door, this light uses different colors to inform staff and visitors about the operating room’s condition, preventing unnecessary entry or disturbance during critical procedures.

Control Methods

The operating room indicator light can be controlled in several ways:

  • Central control panel inside the operating area
  • Three-position switch located next to the door
  • Building Management System (BMS) integrated with ventilation, positive pressure, and door lock system

Technical and Safety Notes

  • The indicator light must have an appropriate IP protection rating (at least IP54) to resist humidity, dust, and cleaning chemicals.
  • The body should be made of durable and washable materials to comply with hospital hygiene standards.

Components of the Three-Color Operating Room Light

The indicator light typically includes three separate colors, each representing a specific room status:

Red – Surgery in Progress

  • Indicates that a surgical procedure is currently being performed.
  • Entry and exit are strictly prohibited except in emergencies.
  • Ventilation, positive pressure, and surgical equipment are active.
  • This mode is usually controlled by the surgeon’s key switch or the operating room control panel.

Yellow – Cleaning or Preparation in Progress

  • Indicates that the room is being cleaned, disinfected, or prepared for the next surgery.
  • Only authorized cleaning or preparation staff may enter.
  • Represents a transition phase between two surgical operations.

Green – Room Ready for Patient Admission

  • The room has been cleaned, disinfected, and is ready for the next patient.
  • Entry of the patient and medical equipment is allowed.
  • No surgical or cleaning activities are currently in progress.