Why Hospitals Need Modern Operation Theater Renovation (2026-27)

Operation theatres are the most demanding rooms in any hospital, and many in Pakistan were built decades ago to standards that no longer meet modern surgical practice. Tiled walls with grout lines, split air conditioners, ceiling fans, open ceiling tiles and cylinders wheeled in from corridors are still common. Modern operation theater renovation replaces these with sealed, cleanable surfaces, engineered ventilation, piped medical gases and safe electrical systems. This guide explains why renovation matters, what a modern OT contains, and how a renovation can be carried out while the hospital keeps working.

Signs an Operation Theatre Needs Renovation

• Split or window air conditioners instead of a dedicated air handling unit
• No HEPA filtration or no positive pressure relative to the corridor
• Tiled walls and floors with grout joints, cracked surfaces or exposed corners
• Lay-in ceiling tiles, exposed light fittings or ceiling fans above the operating table
• Oxygen and nitrous oxide supplied by cylinders inside the theatre
• Extension leads and too few power outlets, no isolated power or UPS backup
• Swing doors that pump air in and out, and no clean or dirty route separation
• Room too small for modern equipment, laparoscopic towers or C-arms

If several of these apply, the theatre is likely to fall short of current infection-control and safety expectations.

Why Renovation Matters

Infection control

Surgical site infections are among the most common healthcare-associated infections, and WHO guidance places strong emphasis on preventing them. The theatre environment matters: filtered air supplied from above the table, positive pressure to keep corridor air out, and smooth, sealed surfaces that can be cleaned thoroughly between cases.

Patient and staff safety

Piped medical gases with alarms reduce the risk of cylinder handling errors and running out of oxygen mid-case. Isolated power, proper earthing and UPS protect patients connected to equipment and keep critical devices running through outages, which remain common in Pakistan.

Licensing and accreditation

Healthcare regulators inspect surgical facilities. Upgrading theatres helps hospitals meet licensing requirements and prepare for accreditation.

New surgical services

Laparoscopic, orthopaedic, cardiac and neurosurgery need more space, more power, more ceiling support and better ventilation than older general theatres provide.

What a Modern Operation Theatre Includes

Detailed design requirements are covered in our guide to operation theater design and construction standards.

Planning the Theatre Suite, Not Just the Room

An operation theatre works as part of a suite. Renovating the theatre alone may leave weak links in the rooms around it. A complete upgrade looks at the whole surgical department.

Supporting rooms

• Changing rooms for male and female staff, forming the boundary between the outside and the restricted zone
• Pre-operative holding where patients are prepared and checked before entering the theatre
• Scrub area with elbow or sensor taps directly outside each theatre
• Sterile store for instruments and supplies, close to the theatres
• Recovery area with monitored bays, oxygen and suction at each bed
• Dirty utility and disposal with a separate route for used instruments and waste

Zoning

Surgical departments are usually divided into unrestricted, semi-restricted and restricted zones, with clothing and access controlled at each boundary. Where the existing building allows, a clean corridor for staff and sterile supplies and a separate route for used instruments and waste reduce cross-contamination.

Room size

Modern surgery uses more equipment than older theatres were built for: anaesthesia machines, laparoscopic towers, imaging, monitors and sometimes robotic systems. If the existing room is too small, combining two smaller rooms or relocating the theatre may be better than fitting new equipment into a cramped space.

Ventilation: The Heart of the Upgrade

ASHRAE 170 sets minimum ventilation requirements for operating rooms, including air change rates, outdoor air, positive pressure and high-efficiency filtration, with supply air delivered from a diffuser array above the operating table. Ultra-clean ventilation with a larger laminar flow canopy is used for orthopaedic implant surgery and other high-risk procedures. Temperature and humidity must be kept within a comfortable range for surgical teams while controlling microbial growth. Achieving this usually needs a dedicated air handling unit for each theatre or theatre suite, with ducts, a return air path at low level and a pressure monitor at the door. See hospital HVAC and infection control for more detail.

Old vs Modern Operation Theatres

Materials and Finishes

Wall and ceiling systems for theatres include powder-coated steel or aluminium modular panels, HPL panels and high-quality antibacterial coatings on smooth substrates. Floors are usually welded seamless vinyl, often antistatic or conductive, turned up the wall as a coved skirting. All joints should be sealed and penetrations for lights, outlets and pipes finished flush. Our guide to hygienic materials for OT and ICU compares the options.

Renovating While the Hospital Keeps Working

Most hospitals cannot close all their theatres at once. A renovation therefore needs careful phasing and infection-control measures during construction.

• Renovate one theatre or suite at a time, keeping others in use
• Build dust-tight barriers and keep the work area at negative pressure
• Provide separate access for workers and materials, away from clean corridors
• Plan shutdowns of gases, power and HVAC at agreed times
• Clean and test thoroughly before returning the theatre to service

The Renovation Process

Testing and Validation

A renovated theatre should not be used until it has been tested. Validation normally includes air flow and air change measurement, pressure differential checks, HEPA filter integrity testing, particle counts, temperature and humidity checks, medical gas purity and pressure tests, and electrical safety tests of isolated power and earthing. Results should be documented and kept for licensing and maintenance.

Planning for Maintenance

A modern theatre needs regular maintenance to keep performing: filter changes, AHU servicing, pressure monitor calibration, medical gas alarm checks and periodic revalidation. Plant should be located where it can be serviced without entering the clean area. The owner should receive operation and maintenance manuals and training as part of handover. Our article on hospital renovation and upgradation services covers wider upgrades of wards and services.

Frequently Asked Questions

Conclusion

Modern operation theater renovation protects patients, supports surgical teams and helps hospitals meet licensing standards. Engineered ventilation, sealed hygienic surfaces, piped gases and safe electrical systems, installed in phases and properly validated, turn an outdated theatre into a safe surgical environment. For a survey and BOQ, contact ACCO on 0322-8000190 or visit our hospital construction page.