Construction and Design of Clean Operating Rooms: Creating “Sterile Armor” for Life-Saving Surgery

If the purification system determines the “quality” of the air in an operating room, then the building structure and finishes determine the “form” and “durability” of the clean environment. It is like a set of “sterile armor” tailor-made for life-saving surgeries—it must be both sturdy and airtight, and smooth and easy to clean, with every detail critical to the success or failure of infection control.

In 2026, the national standard *Technical Specifications for the Construction of Hospital Clean Operating Departments* (GB50333-2013) underwent partial revisions and officially took effect on November 1, 2026. The standard’s title was simultaneously changed to *Technical Standards for the Construction of Hospital Clean Operating Departments*. The new standard includes detailed adjustments in areas such as air handling, pressure differential control, and operational management, imposing higher requirements on building and finishing construction. Excellent design and construction are precisely what allow the concept of “controllability” to take root within the steel and concrete.

I. Strategic Planning: Planning the Operating Department Like a City

A clean operating department is not simply a randomly designated area on a floor; its location and layout determine the quality of its functionality from the very beginning.

1. Location Selection: Avoiding “Sources of Contamination”

Regulations clearly stipulate that the operating department should be located away from sources of contamination and should not be situated on the ground floor or top floor. The ideal location is on an intermediate floor of the building, adjacent to closely related departments such as the ICU, pathology, and blood bank, forming a highly efficient functional cluster. This is analogous to urban site selection: the location should be distant from heavy industrial zones while maintaining convenient access to resource supply areas.

2. Floor Plan Layout: Designing “One-Way Pathways” and “Functional Zones”

This is the core of achieving “separation of clean and contaminated flows.” Through a well-thought-out floor plan, it ensures that doctors, patients, sterile instruments, and postoperative waste each have their own independent pathways that do not intersect. Common layouts include:

· Single-corridor style: Cost-effective and efficient, but clean and contaminated flow paths must be staggered in time, requiring high management standards.
· Dual-corridor layout (clean-contaminated separation): The most classic layout. One side serves as the “clean corridor” for transporting medical staff, sterile instruments, and preoperative patients; the other side serves as the “contaminated corridor,” dedicated to transporting postoperative waste and contaminated instruments. This is akin to a city’s “two-way one-way street,” fundamentally preventing cross-contamination.

· Central Island Layout: The sterile supply room is located in the center, with operating rooms arranged around it, ensuring the shortest supply routes and maximum efficiency.

At the core of all these layouts is the clear demarcation of “clean zones” from “non-clean zones” in the physical space, with buffer rooms (airlocks) established to safeguard this boundary.

II. Selection of Decorative Materials: Choosing the Most Suitable “Plates” for the “Armor”

Every panel in an operating room is chosen not for its “aesthetics,” but for its “functionality.” According to the requirements of GB50333, architectural finishes must adhere to the general principles of being dust-free, resistant to dust accumulation, corrosion-resistant, impact-resistant, crack-resistant, moisture- and mold-resistant, easy to clean, environmentally friendly, energy-efficient, and compliant with fire safety requirements.

1. Walls and Ceilings: Integrated and Modular

· Class I and II High-Standard Operating Rooms: Electrolytically treated steel sheets, aluminum-zinc-coated steel sheets, or stainless steel sheets are commonly used. These materials are factory-manufactured and assembled on-site as a single unit, resulting in minimal seams, excellent structural integrity and airtightness, a mirror-smooth surface, and antimicrobial properties that withstand repeated, rigorous disinfection.
· Class III and IV operating rooms and auxiliary spaces: High-quality color-coated steel panels or inorganic pre-coated panels (such as Qiansi panels or calcium silicate boards) may be selected. These materials also offer excellent scrub resistance, mold resistance, and corrosion resistance.

2. Flooring: Safe, Wear-Resistant, and Anti-Static

· PVC Rolled Sheeting: Currently the most popular choice. It is flexible, slip-resistant, and corrosion-resistant; seams can be heat-welded to form a seamless floor that is easy to clean and maintain.
· Rubber Flooring: Offers superior performance, a more comfortable feel underfoot, and better antimicrobial and noise-reduction properties, making it the choice for higher standards.
· Terrazzo: A traditional and reliable choice, it is exceptionally sturdy and wear-resistant with high load-bearing capacity; however, it requires sophisticated installation techniques and must be properly sealed to prevent dust accumulation.

All materials should preferably be light in color and must be odorless, non-toxic, and eco-friendly to ensure they protect patients without becoming new sources of contamination.

III. The Devil Is in the Details: The 1% That Determines Success or Failure

The construction of a clean operating department truly hinges on mastery of the details. The following “OCD-level” details are a true testament to professionalism:

· All inside corners must be rounded: The junctions between walls and floors, as well as between walls, must be finished with a radius of ≥30 mm. Why? Because right angles create hygiene blind spots where dust and bacteria easily accumulate, whereas rounded corners can be wiped clean in a single swipe.
· All equipment must be flush-mounted: Medicine cabinets, instrument cabinets, X-ray viewing lights, power outlets, and other fixtures must be fully recessed into the walls and flush with the surface to eliminate any protruding surfaces where dust could accumulate.
· All gaps must be reliably sealed: Joints between panels and holes where pipes and cables pass through walls must be thoroughly sealed with mold-resistant, neutral-cure sealant to ensure the airtightness of the building envelope and prevent external contamination from seeping in.
· No Exposed Piping or Wiring: All water, electrical, and gas lines must be concealed within suspended ceilings, wall cavities, or underground to ensure a clean, smooth interior space free of hard-to-clean areas.
· Wood and plaster must not be used as exposed materials.

IV. Turnkey Delivery: Consistency in Every Detail

As experts in healthcare system integration, we deeply understand that architectural finishes serve as the foundational platform for all medical equipment. A successful project must be a cohesive whole where architectural finishes and medical equipment are seamlessly integrated.

· Deep Synergy with “Light-Bed-Tower” Systems: During the planning phase, we pre-engineer robust ceiling load-bearing structures to accommodate overhead towers; design appropriate floor openings and sealing solutions for surgical lights; and plan optimal positions for operating tables to ensure unobstructed airflow. Our equipment is designed with full consideration for the integration details with various finishing surfaces, achieving true “seamless integration.”

· Integrating Resources to Ensure Delivery Quality: We have established a network of experienced “cleanroom engineering” partners and apply unified project management standards to ensure that every detail—from the structural foundation to surface finishes, including rounded corners and recessed installations—strictly complies with the requirements of GB50333-2013 and its 2026 partial revision, delivering a truly comprehensive, reliable, and worry-free clean operating suite.

A truly reliable clean operating suite is built upon countless meticulously executed, unseen details hidden beneath its smooth, seamless surfaces.