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A normal adult has a vital capacity between 3 and 5 litres. [3] A human's vital capacity depends on age, sex, height, mass, and possibly ethnicity. [ 4 ] However, the dependence on ethnicity is poorly understood or defined, as it was first established by studying black slaves in the 19th century [ 5 ] and may be the result of conflation with ...
Inspiratory reserve volume: the maximal volume that can be inhaled from the end-inspiratory level: IC: Inspiratory capacity: the sum of IRV and TV: IVC: Inspiratory vital capacity: the maximum volume of air inhaled from the point of maximum expiration: VC: Vital capacity: the volume of air breathed out after the deepest inhalation. V T
Forced vital capacity: the determination of the vital capacity from a maximally forced expiratory effort: FEV t: 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
The FEV1/FVC ratio, also called modified Tiffeneau-Pinelli index, [1] is a calculated ratio used in the diagnosis of obstructive and restrictive lung disease. [2] [3] It represents the proportion of a person's vital capacity that they are able to expire in the first second of forced expiration to the full, forced vital capacity (). [4]
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 .
Vital capacity: the volume of air breathed out after the deepest inhalation. V T Tidal volume: that volume of air moved into or out of the lungs during quiet breathing (VT 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.)
Inspiratory reserve volume: the maximal volume that can be inhaled from the end-inspiratory level: IC: Inspiratory capacity: the sum of IRV and TV: IVC: Inspiratory vital capacity: the maximum volume of air inhaled from the point of maximum expiration: VC: Vital capacity: the volume of air breathed out after the deepest inhalation. V T
English: Normal values for Forced Vital Capacity (FVC), Forced Expiratory Volume in 1 Second (FEV1) and Forced Expiratory Flow 25–75% (FEF25–75%). Y-axis is expressed in Litres for FVC and FEV1, and in Litres/second for FEF25–75%. See main article: Wikipedia:Spirometry