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由于肺功能测定可以提供功能损害的数据,说明其改变程度,它已由生理学的研究而比较广泛地应用于临床上和工业卫生上。在临床和X线检查表现有明显肺功能损害者,肺功能测定也必然有损害无疑,对此等患者仅表明其损害的深浅而已。肺脏的生理储备功能相当强大,功能常数范围颇广,当疾病轻度时富有代偿能力,虽其功能已有潜在损害,临床可有明显表现,故生理与病理每相接近,甚至上下重叠,难分截然界限。
Since lung function tests can provide data on functional impairment, indicating the degree of change, it has been used clinically and in industrial hygiene extensively by physiology. In clinical and X-ray examination showed significant pulmonary impairment, pulmonary function tests are bound to have no doubt, for these patients only indicate the depth of its damage only. Physiological function of the lungs is quite powerful, a wide range of function constants, when the disease is mild compensatory ability, although its function has been potentially damaged, clinically significant performance, so close to each physiological and pathological, or even up and down overlap, Difficult to distinguish the limit.