The size distribution of droplets in the exhaled breath of healthy human subjects.
The size distribution of droplets in the exhaled breath of healthy human subjects.
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DOI：
10.1089/jam.1997.10.105
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发表时间：
1997-01-01
期刊：
影响因子：
--
通讯作者：
Rosenthal, F S
中科院分区：
文献类型：
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作者：
Papineni, R S;Rosenthal, F S
呼出气中携带的液滴可能携带能够短距离和长距离传播疾病的微生物。这种飞沫的大小分布将影响可能携带的生物体类型以及控制空气传播感染的策略。本研究的目的是表征健康个体呼出的液滴的大小分布。通过光学粒子计数器（OPC）和分析透射电子显微镜（AEM）测量执行四种呼吸动作（口呼吸、鼻呼吸、咳嗽、说话）的人类受试者的呼出液滴。OPC表明小于1 μ的颗粒占优势，尽管也发现了较大的颗粒。AEM的测量证实了呼出气中存在较大尺寸的液滴。一般来说，咳嗽产生的液滴浓度最大，鼻子呼吸最少，但观察到相当大的个体间变异性。
Droplets carried in exhaled breath may carry microorganisms capable of transmitting disease over both short and long distances. The size distribution of such droplets will influence the type of organisms that may be carried as well as strategies for controlling airborne infection. The aim of this study was to characterize the size distribution of droplets exhaled by healthy individuals. Exhaled droplets from human subjects performing four respiratory actions (mouth breathing, nose breathing, coughing, talking) were measured by both an optical particle counter (OPC) and an analytical transmission electron microscope (AEM). The OPC indicated a preponderance of particles less than 1 mu, although larger particles were also found. Measurements with the AEM confirmed the existence of larger sized droplets in the exhaled breath. In general, coughing produced the largest droplet concentrations and nose breathing the least, although considerable intersubject variability was observed.