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Influence of opening and closing process of sliding door on interface airflow characteristic in operating room

机译：滑动门的开关过程对手术室接口气流特性的影响

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摘要

Indoor air environment inside operating room (OR) is crucial for the success of surgical operation. The opening and closing process of sliding door is very common in OR. In this case, the designed positive pressure will disappear. Since the air exchange characteristic at the interface of the sliding door will influence the Surgical Site Infection risk, the combined effects of temperature and pressure differences on interface airflow along with the air infiltration volume and intruding particles caused by the airflow are studied by theoretical and numerical methods. Two different cases are compared, where the temperature of OR is lower or higher than that of anteroom, respectively. Results show that the contaminants accumulate in the upper space of the OR due to the airflow pattern between two rooms when the temperature of OR is lower than the anteroom. This will increase the possibility that airflow carrying contaminants intrudes into OR. On the contrary, the contaminants are controlled in the lower space of the OR when the temperature of OR is higher than that of anteroom. On average, the particle intrusion ratio of the second case decreases by 55% compared with that of the first case. So, it is helpful to protect the clean environment of OR when the temperature of OR is higher than that of the anteroom. Moreover, the air infiltration volume of the closing phase is found unequal to that of the opening phase. This study provides the useful information for maintaining a clean indoor environment under operational condition.
机译：手术室（OR）内的室内空气环境对于外科手术的成功至关重要。滑动门的打开和关闭过程在OR中非常普遍。在这种情况下，设计的正压将消失。由于滑动门界面处的空气交换特性会影响手术部位感染的风险，因此，通过理论和数值研究了温度和压力差对界面气流以及气流引起的空气渗透量和侵入颗粒的综合影响。方法。比较了两种不同的情况，OR的温度分别低于或高于前室的温度。结果表明，当OR的温度低于前室时，由于两个房间之间的气流模式，污染物积聚在OR的上部空间中。这将增加携带污染物的气流侵入OR的可能性。相反，当OR的温度高于前室的温度时，将污染物控制在OR的下部空间中。平均而言，第二种情况的颗粒侵入率比第一种情况的下降了55％。因此，当OR的温度高于房间的温度时，保护OR的清洁环境很有帮助。此外，发现关闭阶段的空气渗透量与打开阶段的空气渗透量不相等。这项研究为在操作条件下保持清洁的室内环境提供了有用的信息。

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