用力呼气后段流速和末段流速测定,已用来诊断小气道病变,按理推测以FVC(用力肺活量)曲线测得的FEF(用力呼气流量)45～55％和FEF70％～80％与MEFV(最大呼气流量-容量曲线)上的V50(50％肺活量最大呼气流量)、V25(25％肺活量最大呼气流量)意义基本相同。本文对146名健康男女的用力呼气流速测定其正常值,报告如下: 一、资料和方法受检者为南通市机关或医院工作人员共146名。其中男106名,女40名;年龄在17～72岁,平均为35岁:均无呼吸系统、 Forced expiratory flow velocity and the last paragraph of the velocity measured, has been used to diagnose small airway disease, it is reasonable to speculate FVC (forced vital capacity) curve measured FEF (forced expiratory flow) and FEF70% ~ 80% V50 (maximum expiratory flow at 50% of vital capacity), V25 (maximum expiratory flow at 25% vital capacity) on the MEFV (maximum expiratory flow volume-volume curve) are essentially the same. 146 healthy men and women forced expiratory flow rate determination of its normal value, the report is as follows: First, the information and methods The subjects were Nantong organs or hospital staff a total of 146. Including 106 males and 40 females; aged 17 to 72 years, mean 35 years: no respiratory system,