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  2. Spirometry - Wikipedia

    en.wikipedia.org/wiki/Spirometry

    Doing spirometry. Spirometry (meaning the measuring of breath) is the most common of the pulmonary function tests (PFTs). It measures lung function, specifically the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled.

  3. Spirometer - Wikipedia

    en.wikipedia.org/wiki/Spirometer

    A spirometer is an apparatus for ... The earliest attempt to measure lung volume can be dated back to the period A.D. 129–200. ... This spirometer measures the flow ...

  4. Minute ventilation - Wikipedia

    en.wikipedia.org/wiki/Minute_ventilation

    Minute ventilation (or respiratory minute volume or minute volume) is the volume of gas inhaled (inhaled minute volume) or exhaled (exhaled minute volume) from a person's lungs per minute. It is an important parameter in respiratory medicine due to its relationship with blood carbon dioxide levels .

  5. Pulmonary function testing - Wikipedia

    en.wikipedia.org/wiki/Pulmonary_function_testing

    Forced expiratory volume (time): a generic term indicating the volume of air exhaled under forced conditions in the first t seconds: FEV 1: Volume that has been exhaled at the end of the first second of forced expiration: FEF x: Forced expiratory flow related to some portion of the FVC curve; modifiers refer to amount of FVC already exhaled ...

  6. Lung volumes - Wikipedia

    en.wikipedia.org/wiki/Lung_volumes

    Forced expiratory volume (time): a generic term indicating the volume of air exhaled under forced conditions in the first t seconds: FEV 1: Volume that has been exhaled at the end of the first second of forced expiration: FEF x: Forced expiratory flow related to some portion of the FVC curve; modifiers refer to amount of FVC already exhaled ...

  7. Helium dilution technique - Wikipedia

    en.wikipedia.org/wiki/Helium_dilution_technique

    The amount of He in the spirometer is known at the beginning of the test (concentration × volume = amount). The patient is then asked to breathe (normal breaths) in the mixture starting from FRC (functional residual capacity), which is the gas volume in the lung after a normal breath out. The spirometer measures helium concentration.

  8. Vital capacity - Wikipedia

    en.wikipedia.org/wiki/Vital_capacity

    Output of a spirometer. Vital capacity (VC) is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume, tidal volume, and expiratory reserve volume. It is approximately equal to Forced Vital Capacity (FVC). [1] [2]

  9. Peak expiratory flow - Wikipedia

    en.wikipedia.org/wiki/Peak_expiratory_flow

    The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) and peak flow measurement, [1] is a person's maximum speed of expiration, as measured with a peak flow meter, a small, hand-held device used to monitor a person's ability to breathe out air.

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