open-circuit spirometry

o·pen-cir·cuit spi·rom·e·try

(ō'pĕn-sĭr'kĭt spī-rom'ĕ-trē)
Measurement of the volume and rate of respiratory air flow by a device into which the subject expels inspired room air.
References in periodicals archive ?
In order to avoid interference during game play, the hose attached to the mouthpiece used for open-circuit spirometry was secured.
Open-circuit spirometry was conducted using a Cosmed K4b2 portable gas analysis system (Cosmed K4b2, Rome, Italy), due to the nature of Prusik climbing and the accuracy and validity of this apparatus relative to standard laboratory-based approaches (15).