在评定肺功能正常或降低时,由于肺脏本身功能性代偿力强,且影响肺功能高低的因素(如性别、身高、体重、体育锻炼、劳动强度等)较多,致使测定的肺功能值在个体间的差异很大。表现在肺部正常与肺部不正常人肺功能测得值的分布相互重叠较多,使实际工作人员对评价肺功能值是否正常带来困难。目 In the assessment of normal or reduced lung function, due to the functional compensatory strength of the lung itself, and the factors that affect the level of lung function (such as gender, height, weight, physical exercise, labor intensity, etc.), resulting in the determination of lung function value There is a big difference between individuals. The distribution of lung function measured in normal and abnormal lungs overlaps with each other, making it difficult for the actual staff to evaluate whether the lung function is normal or not. Head