脉冲振荡法肺功能测定 (IOS)是在强迫振荡技术基础上发展起来的一种测定呼吸阻抗的新方法。它一改传统的肺功能以受试者作为信号源的测试方法 ,将信号源外置 ,让仪器产生激励信号 ,检测受试者反应。该方法无需配合 ,具有方法无创、操作简单快速、结果客观、重复性好、分析全面 Pulsed Oscillatory Pulmonary Function Test (IOS) is a new method of measuring respiratory impedance developed on the basis of forced oscillation technique. It changed the traditional lung function to test the signal source as the test method, the signal source is external, so that the instrument generates a stimulus signal, test subjects response. This method does not need to cooperate with the method of noninvasive, simple and quick operation, objective, reproducible, comprehensive analysis