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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.’