唾液和的吐口罩是否会干扰通风?
Mark W Kroll1, Stacey L Hail2, Michael A Brave3
1From the Biomedical Engineering, California Polytechnical Institute, San Luis Obispo, CA.
The American journal of forensic medicine and pathology
|August 17, 2023
概括
唾液罩允许正常的呼吸空气流动,即使和唾液. 这些发现并不支持唾液充满的唾液罩导致死亡的假设.
科学领域:
- 法医科学 法医科学
- 职业健康和安全 职业健康和安全
背景情况:
- 唾罩被执法部门和医疗人员使用,以防止从唾中传播病原体.
- 之前没有任何研究量化了正常呼吸过程中唾液从唾液罩清除的时间.
研究的目的:
- 在模拟正常呼吸过程中调查和唾液罩的气流和压力动态.
- 评估是否含唾液的唾液罩阻碍了空气流动足以构成风险.
主要方法:
- 通过使用模拟静静呼吸的气动系统 (3 mm Hg 压力) 测试了三种流行的喷罩模型.
- 人工唾液被用来和机盖,用数字仪器测量空气流量/压力.
- 在唾液和后测量空气流量以确定清除时间.
主要成果:
- 所有测试的唾罩在5秒内清除了足够的唾液,以允许空气流量为1m/s.
- 这种气流在类似的压力条件下超过N95口罩的气流.
- 唾罩表现出非常低的呼吸阻力,即使和.
结论:
- 通常使用的唾罩允许充足的空气流通,以使和后的正常呼吸.
- 结果不支持理论,即唾罩导致死亡,原因是唾液阻塞了呼吸道.
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