Douglas bag method

Douglas bag method

for measurements of pulmonary ventilation and respiratory gas exchange and hence estimation of energy expenditure (indirect calorimetry). The subject breathes via a mouthpiece or face mask and one-way valve, so that the expired gas is collected in a large bag over a recorded period of time; the volume is then measured and the gas analysed for oxygen and carbon dioxide content; the differences from inspired air allow calculation of the rates of O2 uptake and CO2 output. Described in 1911 by Oxford physiologist C.G. Douglas.
References in periodicals archive ?
2010) who validated the Oxycon Mobile against the Douglas Bag method.
2010) Evaluation of the Oxycon Mobile metabolic system against the Douglas bag method.
9% between Medical Graphics system and the Douglas bag method.
2001) compared the ParvoMedics computerized system and Douglas bag method over a range of exercise intensities and reported that the limits of agreement of -0.
On the other hand Engebretson (1998) showed no significant differences between the Medical Graphics and the Douglas bag method in measured [V.
2] between the Medical Graphics systems and the Douglas bag method (Porszasz et al.

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