|Moderator:Pauliina (see all)|
What is the breathing rate (the volume of air breathed per a time unit) in different age groups in humans?
Breathing rate can be measured as volume of breaths per day. Breathing rate is used in risk assessment of inhaled toxic compounds. US EPA have provided a report where they have calculated an individual's ventilation rate directly from their oxygen consumption rate. This revised approach will be used to update the ventilation rate information in the Exposure Factors Handbook, which serve as a resources for exposure assessors for calculating inhalation and other exposures.
Table 1. Descriptive statistics (mean values) for daily average ventilation rate (m3/day) in females and males, by age category, Unadjusted for Body Weight; m3/day).
|Birth to <1 year||8.53||8.76|
|3 to <6 years||12.16||12.65|
|6 to <11 years||12.41||13.42|
|11 to <16 years||13.44||15.32|
|16 to <21 years||13.59||17.22|
|21 to <31 years||14.57||18.82|
|31 to <41 years||14.98||20.29|
|41 to <51 years||16.2||20.93|
|51 to <61 years||16.18||20.91|
|61 to <71 years||12.99||17.94|
|71 to <81 years||12.04||16.35|
|81 years and older||11.14||15.15|
Table 2. Breathing rates based on Cerna et al 1998.
|Age group||Inhalation volume (m3/day)|
In general in exposure assessment 20 m3/ day is used as breathing rate value (see chapter 5 in Exposure Factors Handbook.
- Kalaiarasan et al 2009
- Arcus-Arth, Amy; Blaisdell, Robert J: Risk Analysis, Volume 27, Number 1, February 2007 , pp. 97-110(14)
- Respiratory rate as number of breaths a living being .