Definition of vital capacity in English:

vital capacity


  • The greatest volume of air that can be expelled from the lungs after taking the deepest possible breath.

    • ‘Forced vital capacity or negative inspiratory force should be assessed every 2 to 4 hours until patients prove pulmonary stability.’
    • ‘The maximum volume attained represents the forced vital capacity, while the volume attained after one second represents the forced expiratory volume.’
    • ‘A forced vital capacity of less than 50% of the predicted value has been shown to be associated with a poor prognosis.’
    • ‘Lung volume, or changes in lung volume, are often expressed as a percentage of vital capacity.’
    • ‘There is also a report of a 19 ml/yr decline in the vital capacity of non-white males and a 24 ml/yr decline in whites of European descent 25.’
    • ‘Once the diagnosis is considered, measuring maximal inspiratory pressure, maximum voluntary ventilation, and supine and sitting vital capacities will confirm it.’
    • ‘Assessment of cough effectiveness includes measurements of maximal inspiratory and expiratory pressures, peak cough expiratory flow, and either inspiratory or vital capacity.’
    • ‘The frequency of abnormal vital capacity increased, and the mean vital capacity decreased by 18% over the subsequent 10 years.’
    • ‘Forced vital capacity and forced expiratory volume in one second were measured at baseline, at the end of the dieting period, after the 14-week study, and at six and 12 months.’
    • ‘However, in a subset of patients with severe asthma with persistent eosinophilia, the forced vital capacity to slow vital capacity ratio is decreased, which is suggestive of airway collapse on forced expiration.’
    • ‘In addition to standard measures of lung function, forced vital capacity and forced expiratory volume in 1 sec ([FEV.sub.1.0] were also measured.’
    • ‘In one study, the mean vital capacity increased to 69% of the predicted preoperative value one year following transplantation.’
    • ‘In more advanced cases of idiopathic pulmonary fibrosis with a vital capacity less than 50 percent, signs of secondary pulmonary hypertension may be present.’
    • ‘Expiratory reserve volume was determined after a slow vital capacity maneuver.’
    • ‘If a valid measurement of vital capacity is needed for clinical decision-making, then the vital capacity should be measured slowly and separately from forced expiratory maneuvers.’
    • ‘Residual volume was calculated by subtracting the vital capacity from the total lung capacity, determined by the pressure-volume maneuver.’
    • ‘As stated in the article, the effect size for the change in forced expiratory volume in one second was 57 ml; for the vital capacity it was 40 ml, but the change was in the opposite direction.’
    • ‘The functional residual capacity is decreased from the second trimester, while the vital capacity and [FEV.sub.1] are well-maintained throughout the pregnancy in healthy women.’
    • ‘Practising tiger boxing can improve the vital capacity in lungs, and build up the muscles, joints and tendon.’
    • ‘The authors conclude that the ratio of residual volume to total lung capacity is the major determinant of the increase in forced vital capacity achieved by lung volume reduction surgery.’