The Operating Room

The operating room (OR) is a highly specialised and controlled environment that significantly influences surgical outcomes, efficiency, infection control, and team performance. This chapter presents a comprehensive overview of OR design, tracing its evolution from early non-sterile surgical settings to modern high-precision operating theatres, while also highlighting future innovations that are reshaping surgical spaces. Particular emphasis is placed on the requirements of minimal access surgery, where a well-planned OR is essential for optimal performance. Key principles discussed include appropriate room dimensions, zonal structuring to maintain sterility, and ergonomic layouts that facilitate efficient workflow and seamless integration of surgical equipment. Critical design elements such as flooring, wall materials, door systems, and lighting are examined in the context of safety, infection prevention, and functionality. The chapter also addresses essential environmental controls, including air handling systems, temperature and humidity regulation, and electrical infrastructure with reliable backup systems. Supporting facilities within the OR complex, including scrubbing areas, patient movement pathways, pre-operative preparation zones, recovery areas, and staff support spaces, are highlighted as vital components of an efficient surgical ecosystem. Finally, emerging trends such as robotic systems, artificial intelligence, digital integration, sustainability, and human-factor–centred design are explored. These advancements are expected to further enhance precision, adaptability, and efficiency, reinforcing the OR as a dynamic, technology-driven environment aligned with the evolving demands of contemporary surgical practice.