impedance pneumograph

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Pneumograph — A pneumograph, also known as a pneumatograph or spirograph, is a device for recording velocity and force of chest movements during respiration.Principle of operationThere are various kinds of pneumographic devices, which have different principles … Wikipedia
pneumograph — Generic term for any device that records respiratory excursions from movements on the body surface; e.g., an impedance p., which applies the principles of impedance plethysmography to the chest. [G. pneumon, lung, + grapho, to write] * * * … Medical dictionary

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