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探讨了由用力深吸气量－时间曲线（ＦＩＣ－ｔ曲线）测定最大吸气流量（Ｖ（ｉｍａｘ））与用力深吸气量（ＦＩＣ）的方法，并对３５例肺通气功能正常者和８９例慢性阻塞性肺病（ＣＯＰＤ）患者进行了Ｖ（ｉｍａｘ）与ＦＩＣ的测定，同时用改良Ｂｌａｃｋ法由功能残气（ＦＲＣ）位测定最大吸气口腔压（ＭＩＰ）。结果表明：Ｖ（ｉｍａｘ）、ＦＩＣ无论在正常组或ＣＯＰＤ组均与ＭＩＰ显著相关，二者于两组间均存在显著性差异，旦随着ＣＯＰＤ病情加重而降低。因此，作者认为Ｖ（ｉｍａｘ）、ＦＩＣ可作为评价吸气肌力的临床指标。
The method of measuring the maximum inspiratory flow (V (imax)) and forced inspiratory capacity (FIC) by force-depth inspiration-time curve (FIC-t curve) Eighty-nine patients with chronic obstructive pulmonary disease (COPD) underwent Vmax (imax) and FIC, and maximal inspiratory pressure (MIP) was determined by functional blackness (FRC) using modified Black’s method. The results showed that V (imax) and FIC were significantly correlated with MIP both in normal group and in COPD group, both of which had significant difference between the two groups and were decreased with the exacerbation of COPD. Therefore, the authors believe that V (imax), FIC can be used as clinical indicators to evaluate inspiratory muscle strength.