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Tissot spirometer

Pronunciation: te-so'

Definition: a very large water-sealed spirometer designed for accumulating expired gas over a long period of time; the counterbalancing of the bell (almost frictionless) is compensated for by the bell's change in buoyancy as it emerges from the water, keeping the contained gas precisely at ambient atmospheric pressure.

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.