PMID- 10386354
OWN - NLM
STAT- MEDLINE
DCOM- 19990806
LR  - 20061115
IS  - 0002-8894 (Print)
IS  - 0002-8894 (Linking)
VI  - 60
IP  - 3
DP  - 1999 May-Jun
TI  - Experimental deposition of environmental tobacco smoke submicrometer particulate 
      matter in the human respiratory tract.
PG  - 334-9
AB  - Measurements of 15 nonsmokers and 3 smokers breathing environmental tobacco smoke 
      (ETS), were conducted to study particle deposition within the human respiratory 
      tract. The subjects inhaled ETS of count median diameter (CMD) of about 0.2 
      micron and geometric standard deviation (GSD) of 1.7 The particle size 
      distribution in the submicrometer range in the inhaled and exhaled air from the 
      subjects was measured using a scanning mobility particle sizer (SMPS). A 
      deposition of 56.0 +/- 15.9% was observed for nonsmokers while breathing ETS 
      through the nose and 48.7 +/- 11.6% while breathing ETS through the mouth. One 
      individual tested four times gave an average deposition of 57.4 +/- 11.5%, 
      providing an indication of intraindividual variation. Such a variation is 
      expected since the breathing rate was not controlled in order that an indication 
      of the deposition experienced on a day-to-day basis could be obtained. For 
      nonsmokers the deposition while breathing through the mouth was lower than 
      through the nose and the variability within the measurements was also lower for 
      mouth breathing. The latter could be due to the variation in individual size and 
      shape of the nasal passage. Smokers had, on average, a higher rate of deposition 
      but also a higher interindividual variability making it difficult to draw 
      conclusions with respect to the affect of smoking on ETS particle deposition. The 
      average deposition of the three smokers was 65.3 +/- 24.1% for nasal breathing 
      and 66.1 +/- 17.6% for mouth breathing.
FAU - Morawska, L
AU  - Morawska L
AD  - Centre for Medical and Health Physics, Queensland University of Technology, 
      Brisbane, Australia.
FAU - Barron, W
AU  - Barron W
FAU - Hitchins, J
AU  - Hitchins J
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Am Ind Hyg Assoc J
JT  - American Industrial Hygiene Association journal
JID - 0371160
RN  - 0 (Aerosols)
RN  - 0 (Tobacco Smoke Pollution)
SB  - IM
MH  - Adult
MH  - Aerosols
MH  - Humans
MH  - Particle Size
MH  - Respiratory System/*chemistry
MH  - Tobacco Smoke Pollution/*analysis
EDAT- 1999/07/01 00:00
MHDA- 1999/07/01 00:01
CRDT- 1999/07/01 00:00
PHST- 1999/07/01 00:00 [pubmed]
PHST- 1999/07/01 00:01 [medline]
PHST- 1999/07/01 00:00 [entrez]
AID - 10.1080/00028899908984450 [doi]
PST - ppublish
SO  - Am Ind Hyg Assoc J. 1999 May-Jun;60(3):334-9. doi: 10.1080/00028899908984450.