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Potential risk analysis of medical staff when performing endotracheal intubation in negative pressure isolation ward
Indoor and Built Environment ( IF 3.6 ) Pub Date : 2021-01-06 , DOI: 10.1177/1420326x20979015
He Li 1 , Ke Zhong 1 , Zhiqiang (John) Zhai 2
Affiliation  

This study investigated, using validated computational fluid dynamics techniques, the potential infection risks to medical staff when performing endotracheal intubation in the negative pressure isolation ward during treatment of COVID-19 patients. The research first simulated the airflow distribution in negative pressure isolation ward and then examined the potential infection risks to medical staff under two different respiratory conditions of a patient (i.e. patient with endotracheal intubation and patient with normal respiration). The results revealed that medical staff have high possibility to be contracted when performing endotracheal intubation. Personal protective equipment during endotracheal intubation is thus critical to mitigate the potential infection risk to medical staff. Space position and body posture of the medical staff (e.g. standing upright and bent over) would influence the contamination risk. Higher infection risk was noted for the medical staff who performs endotracheal intubation as compared to the other who delivers assistance. A bent-over posture of the medical staff encounters more particle exposure due to a closer distance to the patient head as well as the unfavourable airflow pattern/direction. Protection by using a plastic aerosol box over the head of the patient was studied, which shows promising improvement by preventing more than 75% of virus particles from spreading around.



中文翻译:

负压隔离病房进行气管插管时医务人员的潜在风险分析

这项研究使用经过验证的计算流体动力学技术调查了在COVID-19患者治疗期间在负压隔离病房进行气管插管时医务人员的潜在感染风险。该研究首先模拟了负压隔离病房中的气流分布,然后研究了在两种不同呼吸条件下患者(即气管内插管患者和正常呼吸患者)对医务人员的潜在感染风险。结果表明,进行气管插管时医务人员极有可能收缩。因此,气管插管过程中的个人防护设备对于减轻医务人员的潜在感染风险至关重要。医务人员的空间位置和身体姿势(例如,直立弯腰)会影响污染风险。与进行辅助的其他人员相比,进行气管插管的医务人员的感染风险更高。由于到患者头部的距离更近以及不利的气流模式/方向,医务人员的弯腰姿势会暴露更多的颗粒。研究人员使用患者头部上方的塑料气雾剂盒进行防护,通过防止病毒颗粒扩散超过75%表现出令人鼓舞的改善效果。由于到患者头部的距离更近以及不利的气流模式/方向,医务人员的弯腰姿势会暴露更多的颗粒。研究人员使用患者头部上方的塑料气雾剂盒进行防护,通过防止病毒颗粒扩散超过75%表现出令人鼓舞的改善效果。由于到患者头部的距离更近以及不利的气流模式/方向,医务人员的弯腰姿势会暴露更多的颗粒。研究人员使用患者头部上方的塑料气雾剂盒进行防护,通过防止病毒颗粒扩散超过75%表现出令人鼓舞的改善效果。

更新日期:2021-01-07
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