人类咳嗽时产生的飞沫的大小和浓度。

Shinhao Yang, Grace W M Lee, Cheng-Min Chen, Chih-Cheng Wu, Kuo-Pin Yu
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引用次数: 406

摘要

本研究考察了被试者的液滴核和咳嗽液滴的大小分布。采用空气动力学粒径测定仪(APS)和扫描迁移率粒径测定仪(SMPS)系统(系统1)测定被试咳嗽液滴核的粒径分布。仅采用空气动力学粒径测定仪(APS)系统(系统2)对咳嗽液滴进行取样。此外,研究了不同年龄和性别的咳嗽飞沫的大小分布,以确定年龄和性别对飞沫大小分布的影响。结果表明,液滴核的总平均尺寸分布在0.58 ~ 5.42微米之间,82%的液滴核集中在0.74 ~ 2.12微米之间。整个咳嗽液滴的平均粒径分布为0.62 ~ 15.9微米,平均模态尺寸为8.35微米。咳嗽飞沫的大小分布呈多模态分布。咳嗽液滴的大小分布在约1微米、2微米和8微米处出现三个峰。这些分析结果表明,三个年龄组的平均液滴大小差异不显著(p > 0.1)。雌雄间平均液滴大小差异也不显著(p > 0.1)。雌雄间飞沫浓度差异显著(p > 0.1)。男性受试者的液滴核浓度明显高于女性受试者。不同年龄组被试的飞沫浓度比较表明,30-50岁年龄组的被试飞沫浓度最高。
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The size and concentration of droplets generated by coughing in human subjects.

This work investigated the size distribution of the droplet nuclei and coughed droplets by test subjects. The size distributions of droplet nuclei coughed by test subjects were determined with an aerodynamic particle sizer (APS) and scanning mobility particle sizer (SMPS) system (system 1). Coughed droplets were only sampled with the APS system (system 2). Two different schemes were employed in system 2. Furthermore, the size distribution of coughed droplets of different ages and gender was investigated to identify the effects of age and gender on droplet size distribution. Results indicated the total average size distribution of the droplet nuclei was 0.58-5.42 microm, and 82% of droplet nuclei centered in 0.74-2.12 microm. The entire average size distribution of the coughed droplets was 0.62-15.9 microm, and the average mode size was 8.35 microm. The size distribution of the coughed droplets was multimodal. The size distribution of coughed droplets showed three peaks at approximately 1 microm, 2 microm, and 8 microm. These analytical findings indicate that variation for average droplet size among the three age groups was insignificant (p > 0.1). Moreover, the variation in average droplet size between males and females was also insignificant (p > 0.1). Also, the variation in droplet concentration between males and females was significant (p > 0.1). Droplet nuclei concentrations from male subjects were considerably higher than that from females. Comparison of the droplet concentrations for subjects in different age groups demonstrated that subjects in the 30-50-year age group have the largest droplet concentrations.

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