Physiological Daily Inhalation Rates
for Humans Aged 3
Weeks to 96 Years
Three articles on the physiological daily inhalation rates
for individuals aged 3 weeks to 96 years originating in different groups
highly susceptible to air pollution, notably pregnant and nursing females,
were published in the August 2006 American issue of International Journal of Human and Ecological Risk Assessment.
The distribution of physiological daily inhalation rates for
each age group was determined (in m3/day and m3/kg-day)
according to the disappearance rates of pre-ingested doses of two isotopic
forms of water molecules (2H2O and H218O)
in 2 567 free-living people over 7 to 21 days during real-life situations in
their normal surroundings. The energy expenditure data derived from
gas-isotope-ratio mass spectrometric measurements of disappearance rates of
deuterium (2H) and heavy oxygen-18 (18O) in urine and
saliva samples were converted into physiological daily inhalation rates.
Aggregation of the latter rates reflects the adequate daily oxygenation of
these individuals over 36 000 days.
For more information, contact:
pierre.brochu@mddep.gouv.qc.ca
Tel: 418 521-3820, ext. 4572
Fax: 418 646-8483
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