Breathing rate

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Scope

What is the breathing rate (the volume of air breathed per a time unit) in different age groups in humans?

Definition

Data

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).[1]

Females Males
Birth to <1 year 8.53 8.76
1 year 13.31 13.49
2 years 12.74 13.23
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.[2]

Age group Inhalation volume (m3/day)
Adult 20
Children (8-10y) 10
Children (1y) 3.8
New born 0.8

Unit

m3/day

Formula

Result

In general in exposure assessment 20 m3/ day is used as breathing rate value (see chapter 5 in Exposure Factors Handbook.


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References

See also

  • Respiratory rate as number of breaths a living being [3].
  • U.S. EPA. Metabolically Derived Human Ventilation Rates: A Revised Approach Based Upon Oxygen Consumption Rates (Final Report). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-06/129F, 2009.
  • Cerna et al 1998
  • Retrieved from "http://opasnet.org/en-opwiki/index.php?title=Breathing_rate&oldid=10623"