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Slow vital capacity

The combinations or sums of two or more lung volumes are termed capacities (see Fig. 25-1). Vital capacity (VC) is the maximal amount of air that can be exhaled after a maximal inspiration. It is equal to the sum of the IRV, Vt, and ERV. When measured on a forced expiration, it is called the forced vital capacity (FVC). When measured over an exhalation of at least 30 seconds, it is called the slow vital capacity (SVC, VC). The VC is approximately 75% of the total lung capacity (TLC), and when the SVC is within the normal range, a significant restrictive disorder is unlikely. Normally, the values for SVC and FVC are very similar unless airway obstruction is present. [Pg.496]


See other pages where Slow vital capacity is mentioned: [Pg.322]    [Pg.322]    [Pg.285]    [Pg.586]    [Pg.124]    [Pg.759]    [Pg.223]    [Pg.425]    [Pg.90]    [Pg.300]    [Pg.181]    [Pg.187]   
See also in sourсe #XX -- [ Pg.496 , Pg.498 ]




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