Abstract This study thoroughly investigated, using validated computational fluid dynamics (CFD) techniques, the influences of ventilation on the fate of particles generated by patient and medical staff in an operating room (OR) under a variety of operating conditions. The research first investigated that the body positions of surgeons (i.e., standing upright and bent over) have a significant impact on the spread of indoor pollutants. This can be one of the primary reasons that the conventional unidirectional ventilation system in the OR may still not mitigate the risk of surgical site infections (SSI). The study then revealed the adverse impacts of different upper respiratory tract characteristics of the patient (i.e., normal respiration, or coughing and sneezing under local/regional anesthesia) to the medical staff, disclosing the importance of wearing a respiratory mask of such patients during the surgery. This study further explored the influences of smoke particles generated from the patient's wound to the medical staff when using an electric knife during the surgery under four different ventilation methods, including the conventional unidirectional ventilation and three localized ventilation approaches proposed by this research. The results indicate that localized ventilation can be an effective supplement to the central ventilation system to mitigate the potential cross-infection risks between patient and medical staff.

中文翻译：

---

调查通风对手术室患者和医务人员产生的颗粒物归宿的影响

摘要 本研究使用经过验证的计算流体动力学 (CFD) 技术彻底调查了通风对手术室 (OR) 中患者和医务人员在各种操作条件下产生的颗粒命运的影响。该研究首先调查了外科医生的体位（即直立和弯腰）对室内污染物的传播有显着影响。这可能是手术室中传统单向通气系统可能仍无法降低手术部位感染 (SSI) 风险的主要原因之一。该研究随后揭示了患者的不同上呼吸道特征（即正常呼吸，或在局部/区域麻醉下咳嗽和打喷嚏）对医务人员的不利影响，披露在手术过程中为此类患者佩戴呼吸面罩的重要性。本研究进一步探讨了在手术过程中使用电刀在四种不同通气方式下患者伤口产生的烟雾颗粒对医务人员的影响，包括常规单向通气和本研究提出的三种局部通气方法。结果表明，局部通风可以作为中央通风系统的有效补充，以减轻患者和医务人员之间潜在的交叉感染风险。在四种不同的通气方法下，包括传统的单向通气和本研究提出的三种局部通气方法，在手术过程中使用电刀对医务人员造成的伤害。结果表明，局部通风可以作为中央通风系统的有效补充，以减轻患者和医务人员之间潜在的交叉感染风险。在四种不同的通气方法下，包括传统的单向通气和本研究提出的三种局部通气方法，在手术过程中使用电刀对医务人员造成的伤害。结果表明，局部通风可以作为中央通风系统的有效补充，以减轻患者和医务人员之间潜在的交叉感染风险。