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对５２例慢性阻塞性肺疾病（ＣＯＰＤ）患者进行床旁最大吸气流速（ＭＩＦＲ）监测。结果：ＣＯＰＤ急性加重期ＭＩＰＲ较缓解期明显降低（Ｐ＜０．０５），后者较正常人ＭＩＦＲ亦显著降低（Ｐ＜０．０５）；急性加重期伴ＣＯ＿２潴留者ＭＩＦＲ值低于无ＣＯ＿２潴留者（Ｐ＜０．０５）。ＭＩＦＲ与ＰａＣＯ＿２呈负相关（ｒ＝－０．６２，Ｐ＜０．００５），与最大通气量（ＭＶＶ）呈正相关（ｒ＝０．６１，Ｐ＜０．００５），直线回归方程分别为：Ｙ（ＰａＣＯ＿２）＝６７．４－１４．３ＭＩＦＲ（Ｌ／ｓ），Ｙ（ＭＶＶ）＝９．８＋１９．３ＭＩＦＲ（Ｌ／ｓ）。提示：ＭＩＦＲ是准确反映肺功能损害程度的可靠指标，并能提示预后，对及时发现吸气肌疲劳，进行合理治疗有指导作用。
52 cases of chronic obstructive pulmonary disease (COPD) patients bedside maximum inspiratory flow rate (MIFR) monitoring. Results: The MIPR in acute exacerbation of COPD was significantly lower than that in remission (P <0.05), and the latter was significantly lower than that in normal subjects (P <0.05). The MIFR of patients with exacerbation of COPD was lower than that without CO_2 Retention (P <0.05). MIFR was negatively correlated with PaCO_2 (r = -0.62, P <0.005), and positively correlated with MVV (r = 0.61, P <0.005). The linear regression equations were: Y (PaCO 2) = 67.4-14.3 MIFR (L / s), Y (MVV) = 9.8 + 19.3 MIFR (L / s). Tip: MIFR is a reliable indicator of lung function damage accurately reflect the degree and prognosis, timely detection of inspiratory muscle fatigue, a reasonable guide to the treatment.