Respiratory Volumes
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| Tidal Volume (TV) | amount of air inhaled or exhaled with each breath under resting conditions
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| Inspiratory reserve volume (IRV) | amount of air that can be forcefully inhaled after a normal tidal volume inhalation
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| Expiratory reserve volume (ERV) | amount of hair that can be forcefully exhaled after a normal tidal volume exhalation
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| Residual volume (RV) | amount of air remaining in lungs after a forced exhalation
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| RESPIRATORY CAPACITIES |
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| Total lung capacity (TLC) | maximum amount of air contained in lungs after a maximum inspiratory effort ( TLC = TV + IRV +ERV + RV)
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| Vital capacity (VC) | maximum amount of air that can be expired after a maximum inspiratory effort (VC = TV + IRV + ERV)
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| Inspiratory capacity (IC) | maximum amount of air that can be inspired after a normal expiration
(IC = TV + IRV)
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| Functional residual capacity (FRC) | volume of air remaining in lungs after a normal tidal volume expiration ( FRC = ERV + RV)
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| Minute ventilation | the amount of gas that flows into or out of the respiratory system in one minute ( MV = TV x breathing frequency)
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| Alveolar ventilation | takes into account the dead space: AV = (TV - dead space) (breathing frequency)
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