title: Application of the hot-wire anemometer to respiratory measurements in small animal.
abstract: 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.
mesh_terms: D000818:Animals; D002245:Carbon Dioxide; D006813:Humidity; D008176:Lung Volume Measurements / Q000295:instrumentation*; D012123:Pulmonary Ventilation; D013696:Temperature; D013990:Tidal Volume / Q000295:instrumentation*
chemical_list: D002245:Carbon Dioxide