作者对240例正常人,147例COPD患者和85例癌瘤患者的MBC实测值以及由FEV_1计算的MBC推算值进行了分析,并将二者的比值称之为“用力指数”。研究表明,中、重度COPD患者因呼吸肌负担过重而疲劳衰竭,致用力指数明显降低,消瘦的癌瘤患者因呼吸肌力降低,用力指数亦下降。作者认为,用力指数可作为估计呼吸肌力的一项简便而实用的指标。 The authors analyzed the MBC measurements of 240 normal subjects, 147 COPD patients, and 85 cancer patients as well as the estimated MBC calculated by FEV_1, and called them the “force index.” Studies have shown that moderate to severe COPD patients due to overloaded breathing muscle fatigue failure, resulting in significantly decreased strength index, weight loss of cancer patients due to reduced muscle strength index also decreased. The author believes that the force index can be used as a simple and practical indicator of respiratory muscle strength.