Biological particles in the operating room (OR) air environment can cause surgical site infections (SSIs). Various ventilation systems have been employed in ORs to ensure an ultraclean environment. However, the effect ofdifferent ventilation systems on the control ofbacteria-carrying particles (BCPs) released from the surgical staff during surgery is unclear. In this study, the performance of four different ventilation systems (vertical laminar airflow ventilation (VLAF), horizontal laminar airflow ventilation (HLAF), differential vertical airflow ventilation (DVAF), and temperature-controlled airflow ventilation (TAF)) used in an OR was evaluated and compared based on the spatial BCP concentration. The airflow field in the OR was solved by the Renormalization Group (RNG) k-ε turbulence model, and the BCP phase was calculated by Lagrangian particle tracking (LPT) and the discrete random walk (DRW) model. It was found that the TAF system was the most effective ventilation system among the four ventilation systems for ensuring air cleanliness in the operating area. This study also indicated that air cleanliness in the operating area depended not only on the airflow rate of the ventilation system but also on the airflow distribution, which was greatly affected by obstacles such as surgical lamps and surgical staff.

手术室 (OR) 空气环境中的生物颗粒可能导致手术部位感染 (SSI)。手术室采用了各种通风系统，以确保超洁净的环境。然而，不同通气系统对手术过程中手术人员释放的携带细菌颗粒（BCP）的控制效果尚不清楚。在本研究中，手术室中使用的四种不同通风系统（垂直层流通风 (VLAF)、水平层流通风 (HLAF)、差动垂直气流通风 (DVAF) 和温控气流通风 (TAF)）的性能基于空间BCP浓度进行评估和比较。手术室中的气流场采用重正化群（RNG） k-ε湍流模型求解，BCP相位采用拉格朗日粒子追踪（LPT）和离散随机游走（DRW）模型计算。结果发现，TAF系统是四种通风系统中确保手术区域空气清洁度最有效的通风系统。这项研究还表明，手术区域的空气洁净度不仅取决于通风系统的气流速度，还取决于气流分布，而气流分布受手术灯和手术人员等障碍物的影响很大。