PMID- 18158720
OWN - NLM
STAT- MEDLINE
DCOM- 20080221
LR  - 20071226
IS  - 0894-2684 (Print)
IS  - 0894-2684 (Linking)
VI  - 20
IP  - 4
DP  - 2007 Winter
TI  - The size and concentration of droplets generated by coughing in human subjects.
PG  - 484-94
AB  - 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.
FAU - Yang, Shinhao
AU  - Yang S
AD  - Department of Environmental and Occupational Health, Toko University, Taiwan, 
      Republic of China.
FAU - Lee, Grace W M
AU  - Lee GW
FAU - Chen, Cheng-Min
AU  - Chen CM
FAU - Wu, Chih-Cheng
AU  - Wu CC
FAU - Yu, Kuo-Pin
AU  - Yu KP
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - United States
TA  - J Aerosol Med
JT  - Journal of aerosol medicine : the official journal of the International Society 
      for Aerosols in Medicine
JID - 8809251
RN  - 0 (Aerosols)
MH  - Adolescent
MH  - Adult
MH  - *Aerosols
MH  - Age Factors
MH  - Breath Tests
MH  - Child
MH  - *Cough
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - *Particle Size
MH  - Sex Factors
EDAT- 2007/12/27 09:00
MHDA- 2008/02/22 09:00
CRDT- 2007/12/27 09:00
PHST- 2007/12/27 09:00 [pubmed]
PHST- 2008/02/22 09:00 [medline]
PHST- 2007/12/27 09:00 [entrez]
AID - 10.1089/jam.2007.0610 [doi]
PST - ppublish
SO  - J Aerosol Med. 2007 Winter;20(4):484-94. doi: 10.1089/jam.2007.0610.