Journal of Applied Physiology, Vol 40, Issue 2 275-277, Copyright © 1976 by American Physiological Society
Application of the hot-wire anemometer to respiratory measurements in small animal
A. Godal, D. A. Belenky, T. A. Standaert, D. E. Woodrum, L. Grimsrud and W. A. Hodson
A hot-wire anemometer was evaluated to determine its suitability for
measurement of small tidal volumes. Used with a constant background flow of
gas, the output of the hot-wire anemometer was linear and independent of
respiratory frequency, temperature, and humidity. The change in output with
CO2 concentration was negligible within the physiologic range. The use of a
background flow eliminates the need for one-way valves, minimizes dead
space, and maintains the flow velocity past the hot wire within its range
of linear response.
