Suratt P M, Hooe D M, Owens D A, Anne A
Respiration. 1981;42(4):233-6. doi: 10.1159/000194436.
Data from flow volume curves suggest that flow measured at the mouth may be lower with maximal effort than with submaximal effort. We consequently studied the effect of maximal vs. submaximal expiratory effort on spirometric values. Significant increases in FVC, FEV1 or FEF25-75% with submaximal effort occurred in 12 of 38 subjects. All subjects who improved spirometric values had peak flows with submaximal efforts that varied from 91 to 65% of peak flow with maximal efforts. We conclude that spirometric values in some subjects are larger with submaximal rather than maximal effort.
流量容积曲线数据表明，最大用力时口腔测量的流量可能低于次最大用力时的流量。因此，我们研究了最大呼气用力与次最大呼气用力对肺量计测量值的影响。38名受试者中有12名在次最大用力时FVC、FEV1或FEF25-75%显著增加。所有肺量计测量值改善的受试者，其次最大用力时的峰值流量为最大用力时峰值流量的91%至65%。我们得出结论，一些受试者次最大用力时的肺量计测量值大于最大用力时的测量值。
