Size Distribution of Exhaled Particles in the Range from 0.01 to 2.0 µm

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Holmgren, Helene,1981Chalmers tekniska högskola,Chalmers University of Technology (author)

This study investigates the number size distribution of endogenously produced exhaled particles during tidal breathing and breathing with airway closure. This is the first time that the region below 0.4 µm has been investigated. The particle concentration was generally lower for tidal breathing than for airway closure, although the inter-individual variation was large. During tidal breathing, the size distribution peaks at around 0.07 µm. This peak is still present during the airway closure manoeuvre, but an additional broad and strong peak is found between 0.2 and 0.5 µm. This suggests that different mechanisms govern the generation of particles in the two cases. The particles produced from airway closure may be attributed to formation of film droplets in the distal bronchioles during inhalation. It is speculated that the very small particles are film droplets originating from the alveolar region.

Ljungström, Evert,1949Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry,University of Gothenburg(Swepub:gu)xljune (author)
Almstrand, Ann-CharlotteGothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för samhällsmedicin och folkhälsa,Institute of Medicine, School of Public Health and Community Medicine,University of Gothenburg(Swepub:gu)xisaan (author)
Bake, Björn,1939Gothenburg University,Göteborgs universitet,Institutionen för medicin,Institute of Medicine,University of Gothenburg(Swepub:gu)xbakbj (author)
Olin, Anna-Carin,1960Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för samhällsmedicin och folkhälsa,Institute of Medicine, School of Public Health and Community Medicine,University of Gothenburg(Swepub:gu)xolina (author)
Chalmers tekniska högskolaInstitutionen för kemi (creator_code:org_t)

By the author/editor: Holmgren, Helene ...; Ljungström, Ever ...; Almstrand, Ann-C ...; Bake, Björn, 193 ...; Olin, Anna-Carin ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Health Sciences; and Public Health Gl ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Medical Engineer ...; and Medical Laborato ...

By the university: University of Gothenburg; Chalmers University of Technology

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