Practical implementation of the barometric method for measurement of tidal volume.
The barometric method is unique in permitting measurement of tidal volume in a totally noninvasive manner. Its application and accuracy have been limited by several complex problems. These include control of inspired gas composition, base-line stability, and asymmetry of processes occurring during inspiration and expiration. A new method is described that addresses these problems and facilitates long-term measurements. New calculations, which avoid previous errors that caused the method to systematically underestimate tidal volume, are illustrated.
D000818:Animals; D001274:Atmospheric Pressure; D004355:Drug Stability; D005740:Gases / Q000032:analysis; D006801:Humans; D008176:Lung Volume Measurements / Q000379:methods*; D012119:Respiration; D013990:Tidal Volume / Q000295:instrumentation / Q000379:methods*
D005740:Gases