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RV: Residual volume: the volume of air remaining in the lungs after a maximal exhalation: ERV: Expiratory reserve volume: the maximal volume of air that can be exhaled from the end-expiratory position: IRV: Inspiratory reserve volume: the maximal volume that can be inhaled from the end-inspiratory level: IC: Inspiratory capacity: the sum of IRV ...
Exhalation (or expiration) is the flow of the breath out of an organism. In animals, it is the movement of air from the lungs out of the airways , to the external environment during breathing . This happens due to elastic properties of the lungs, as well as the internal intercostal muscles which lower the rib cage and decrease thoracic volume.
TLC: Total lung capacity: the volume in the lungs at maximal inflation, the sum of VC and RV. TV: Tidal volume: that volume of air moved into or out of the lungs in 1 breath (TV indicates a subdivision of the lung; when tidal volume is precisely measured, as in gas exchange calculation, the symbol TV or V T is used.)
Lung volumes. Functional residual capacity (FRC) is the volume of air present in the lungs at the end of passive expiration. [1] At FRC, the opposing elastic recoil forces of the lungs and chest wall are in equilibrium and there is no exertion by the diaphragm or other respiratory muscles.
In obstructive lung disease, the FEV1 is reduced due to an obstruction of air escaping from the lungs. Thus, the FEV1/FVC ratio will be reduced. [4] More specifically, according to the National Institute for Clinical Excellence, the diagnosis of COPD is made when the FEV 1 /FVC ratio is less than 0.7 or [8] the FEV 1 is less than 75% of predicted; [9] however, other authoritative bodies have ...
RV: Residual volume: the volume of air remaining in the lungs after a maximal exhalation: ERV: Expiratory reserve volume: the maximal volume of air that can be exhaled from the end-expiratory position: IRV: Inspiratory reserve volume: the maximal volume that can be inhaled from the end-inspiratory level: IC: Inspiratory capacity: the sum of IRV ...
RV: Residual volume: the volume of air remaining in the lungs after a maximal exhalation: ERV: Expiratory reserve volume: the maximal volume of air that can be exhaled from the end-expiratory position: IRV: Inspiratory reserve volume: the maximal volume that can be inhaled from the end-inspiratory level: IC: Inspiratory capacity: the sum of IRV ...
TLC: Total lung capacity: the volume in the lungs at maximal inflation, the sum of VC and RV. TV: Tidal volume: that volume of air moved into or out of the lungs in 1 breath (TV indicates a subdivision of the lung; when tidal volume is precisely measured, as in gas exchange calculation, the symbol TV or V T is used.)