Acute lung function responses to ambient acid aerosol exposures in children
We examined the relationship between lung function changes and ambient acid aerosol episodes in children attending a residential summer camp. Young females (112) performed daily spirometry, and 96 were assessed on one occasion for airway hyperresponsiveness using a methacholine bronchoprovocation test. Air quality measurements were performed on site and four distinct acid aerosol episodes were observed during the 41-day study. The maximum values observed during the 41-day study were: O/sub 3/ at 143 ppb; H/sub 2/SO/sub 4/ at 47.7 micrograms/m/sup 3/; and (H+) at 550 nmole/m/sup 3/. Maximum decrements of 3.5 and 7% for FEV1 and PEF, respectively, were observed to be associated with the air pollution episodes. There was some evidence of a differential lung function response to the episodes where children with a positive response to a methacholine challenge had larger decrements compared to their nonresponsive counterparts.
- Research Organization:
- Dept. of National Health and Welfare, Ottawa (Canada)
- OSTI ID:
- 6066361
- Journal Information:
- Environ. Health Perspect.; (United States), Vol. 79
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACID RAIN
HEALTH HAZARDS
HYDROGEN IONS
LUNGS
SENSITIVITY
OZONE
SULFURIC ACID
AEROSOLS
AIR POLLUTION
ASTHMA
CHILDREN
DYNAMIC FUNCTION STUDIES
INHALATION
MAN
PARTICLE SIZE
AGE GROUPS
ANIMALS
ATMOSPHERIC PRECIPITATIONS
BODY
CHARGED PARTICLES
COLLOIDS
DISEASES
DISPERSIONS
HAZARDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INTAKE
IONS
MAMMALS
ORGANS
POLLUTION
PRIMATES
RAIN
RESPIRATORY SYSTEM
RESPIRATORY SYSTEM DISEASES
SIZE
SOLS
VERTEBRATES
560300* - Chemicals Metabolism & Toxicology