Operating Theatre Cleaning

Operating theatre cleaning is the most critical environmental hygiene discipline within any healthcare facility. Surgical site infections (SSIs) remain a significant cause of morbidity, extended hospital stays, and increased healthcare costs. The meticulous cleaning and disinfection of operating theatres between procedures and at the end of each surgical day directly contributes to SSI prevention and patient safety outcomes.

Australian Standards for Operating Theatre Cleaning

Operating theatre cleaning in Australia operates within the framework established by the Australian Guidelines for the Prevention and Control of Infection in Healthcare, published by the Australian Commission on Safety and Quality in Health Care (ACSQHC). The NSQHS Standards, particularly Standard 3 (Preventing and Controlling Healthcare-Associated Infection), require health service organisations to demonstrate effective environmental cleaning programs in surgical areas.

State health department guidelines supplement the national framework. SA Health Cleaning Standards classify operating theatres as very high risk areas requiring the most stringent cleaning protocols, product selection, and audit frequency. Queensland Health and NSW Health publish detailed procedure-specific guidance for surgical environment decontamination.

All disinfectants used in operating theatres must be registered with the Therapeutic Goods Administration (TGA) as hospital-grade disinfectants and listed on the Australian Register of Therapeutic Goods (ARTG). Product selection must consider antimicrobial spectrum, material compatibility with surgical equipment, and required contact time.

Between-Case Turnover Cleaning

Turnover cleaning occurs between surgical cases when the completed patient departs and before the next patient enters the theatre. This focused clean typically takes 10 to 15 minutes and targets all surfaces within the surgical zone that may have been contaminated during the procedure.

Don appropriate PPE including gloves, gown or apron, and eye protection. Remove all visible soil including blood, tissue, and fluid contamination from the operating table, instrument trolleys, anaesthetic machine surfaces, and floor areas using disposable cloths and a neutral detergent.

Apply hospital-grade disinfectant to all surfaces within the operative field zone including the operating table and its accessories, overhead surgical lights and their handles, electrosurgical unit controls, suction equipment housings, IV poles, and any repositioned equipment. Allow the full manufacturer-specified contact time before the surface is considered safe for the next case.

Mop the floor within a two-metre radius of the operating table and along the path from table to door where staff and equipment traffic occurs. Use a clean mop head for each theatre to prevent cross-contamination between surgical suites.

End-of-Day Terminal Cleaning

Terminal cleaning after the final case of the day provides comprehensive disinfection of the entire theatre environment. This thorough clean requires 30 to 60 minutes depending on theatre size and complexity, and covers every accessible surface from ceiling to floor.

Begin with overhead surfaces including surgical light housings, ceiling-mounted equipment booms, and pendant systems. Clean anaesthetic machine exteriors, ventilator surfaces, monitoring equipment, and all mounted accessories. Wipe down wall-mounted suction outlets, gas terminals, electrical panels, and light switches.

Clean all furniture including instrument trolleys, mayo stands, kick buckets, seating, arm boards, and patient positioning devices. The operating table requires detailed cleaning of the table top, base, column, pedals, and remote controls. Disassemble removable table accessories for separate cleaning.

Wash walls from top to bottom, paying attention to splash zones behind the operating table and scrub sink areas. Clean all horizontal ledges, shelving, and storage surfaces within the theatre. Mop the entire floor area, moving all mobile equipment to access underneath and behind items.

Weekly and Periodic Deep Cleaning

Weekly deep cleaning extends terminal cleaning to include areas not covered in daily routines. Clean ceiling panels, ventilation diffusers, and HEPA filter grilles. Operating theatre ventilation systems deliver filtered laminar airflow to maintain an ultraclean air environment as specified in AS 1668.2 and the relevant state health facility guidelines.

Dust and clean all high-level surfaces including the tops of wall-mounted cabinets, equipment booms in their full range of motion, and cable management systems. Clean the interior and exterior of storage cupboards within the theatre. Inspect and clean door seals that maintain positive pressure differentials.

Quarterly tasks may include professional cleaning of laminar flow diffuser faces, detailed cleaning of ceiling track systems for pendant equipment, and assessment of wall and floor surface integrity for damage that compromises cleanability.

Scrub Bay and Preparation Area Cleaning

Surgical scrub bays adjacent to operating theatres require daily cleaning of basin interiors, tap assemblies, scrub brush dispensers, and splash surfaces. These areas must maintain the highest hygiene standards as the final handwashing point before surgeons enter the sterile field.

Clean scrub bay floors, drains, and surrounding wall surfaces daily. Ensure soap dispensers function correctly and contain the specified surgical hand preparation agent. Report any plumbing issues including slow drainage or tap malfunction that could compromise the scrub process.

Anaesthetic and Recovery Area Cleaning

The anaesthetic bay within each theatre and the post-anaesthetic care unit (PACU/recovery) require cleaning protocols appropriate to their patient contact intensity. Anaesthetic equipment including laryngoscope handles, face mask exteriors, and monitoring cables require disinfection between each patient.

Recovery bay cleaning follows similar protocols to ward-level patient area cleaning with between-patient disinfection of bed surfaces, monitoring equipment, and high-touch surfaces. PACU areas see rapid patient turnover requiring efficient cleaning cycles that maintain infection control standards while supporting surgical throughput.

Specialised Contamination Scenarios

Procedures involving known or suspected prion disease (Creutzfeldt-Jakob disease) require specific decontamination protocols that differ significantly from standard operating theatre cleaning. Prions are resistant to conventional disinfection methods. Follow the ACSQHC guidance on reprocessing of instruments and environmental decontamination for suspected CJD cases.

Cases involving patients with known MRO colonisation or active tuberculosis may require enhanced terminal cleaning including hydrogen peroxide vapour (HPV) decontamination or ultraviolet-C (UVC) disinfection as adjunctive measures following thorough manual cleaning.

Quality Assurance and Audit

Operating theatre cleaning requires robust audit programs to verify standards. ATP bioluminescence testing provides rapid feedback on surface cleanliness by measuring organic residue levels. Fluorescent marker systems enable objective assessment of whether surfaces have been physically contacted during cleaning.

Document all cleaning activities with date, time, theatre number, cleaning type, and staff identification. Audit results should be reviewed monthly by the infection prevention and control team and fed back to cleaning staff and management.

Engaging Professional Theatre Cleaning Services

Cleaning companies providing operating theatre services must demonstrate the highest level of healthcare cleaning competency. Staff require specific training in surgical environment protocols, PPE requirements, chemical handling, and the unique workflow demands of theatre operations. Verify NSQHS-aligned training programs, immunisation compliance, and documented competency assessment frameworks before engaging a theatre cleaning provider.