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最大呼气流速-容量曲线(以下简称流速-容量曲线)中 V_(50)、V_(25)为检查小气道功能的重要指标。但受一些因素影响,与病理结果比较,也有不符合率。本文通过对正常人和吸烟者流速-容量曲线的比较,研究了下降支某些指标对小气道功能异常的检出率,及与小气道功能检查传统指标 V_(50)、V_(25)的相关性,旨在提高流速一容量曲线的临床应用价值,现将其结果简要报告如下,供临床参考。
V_ (50) and V_ (25) in the maximal expiratory flow velocity-volume curve (hereinafter referred to as flow-volume curve) are important indexes for examining the function of small airways. But by some factors, compared with the pathological results, there are also non-compliance rate. In this paper, we compared the velocity-volume curves of normal people with those of smokers, and studied the detection rate of some small descending aorta on small airway dysfunction and the relationship between V_ (50) and V_ (25) Relevance to improve the flow rate of a capacity curve of clinical application, the results are now briefly reported as follows for clinical reference.