Due to the requirements of indoor environment parameters, including temperature, humidity, air speed and indoor quality, the design of the surgical environment is a very complex task. However, with limited studies on the effective exhaust airflow in OR, the impact of exhaust airflow on the surgical environment is still unclear, especially when mixing ventilation with multiple supply and multiple exhaust. The objective of this study was to identify the effect of different exhaust airflow on the air quality in the surgical environment of a full-scaled OR laboratory with mixing ventilation. Experimental measurements were performed with three scenarios of ventilation solutions at two different air change rates. The air velocity, turbulence intensity, air temperature, and tracer gas concentration were measured to evaluate the indoor quality of the surgical environment. The results suggested that a better layout for the instrument table should be placed at 1.0–1.5 m from the wall. Furthermore, airflow from the inlet to the outlet should be guaranteed to cross the clean zone as much as possible, and no obstacles should be placed in the path of the airflow from the inlet to the outlet. The results also indicated that airflow with six exhausts were best, with a higher contaminant removal efficiency of about 38% than eight exhausts in 18 h^-1 ACH, while for 20 h^-1, a four-exhaust strategy was the best at approximately 35% higher than eight exhausts. The results of this study may contribute to more effective ventilation systems for OR.

由于室内环境参数（包括温度，湿度，空气速度和室内质量）的要求，因此手术环境的设计是一项非常复杂的任务。但是，由于对OR中有效排气的研究有限，所以排气流对手术环境的影响仍然不清楚，尤其是在将通风与多气源和多排气混合使用时。这项研究的目的是确定在混合通风的大型OR实验室的手术环境中，不同排气流对空气质量的影响。实验测量是在两种不同换气速率下用三种通风解决方案进行的。空气速度，湍流强度，气温 测量示踪气体的浓度，以评估手术环境的室内质量。结果表明，应在距墙壁1.0-1.5 m处放置更好的仪表台布局。此外，应确保从进气口到排气口的气流尽可能地越过洁净区，并且在从进气口到排气口的气流路径中不应放置任何障碍物。结果还表明，具有六个排气口的气流最好，在18小时内的污染物去除效率比八个排气口高38％从入口到出口的气流路径上不应放置障碍物。结果还表明，具有六个排气口的气流是最佳的，在18小时内的污染物去除效率比八个排气口高38％从入口到出口的气流路径上不应放置障碍物。结果还表明，具有六个排气口的气流最好，在18小时内的污染物去除效率比八个排气口高38％^-1 ACH，而对于20 h ^-1，四排气策略是最好的，比八排气策略高出约35％。这项研究的结果可能有助于更有效的OR通风系统。