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肺功能检测是诊断支气管哮喘的重要手段之一,临床上常用第一秒用力呼气容积(FEV1)或峰流速(PEF)变化率作为判断支气管哮喘的重要指标。但儿童特别是幼儿对常规肺功能检查总不能很好配合,即使在清醒状态下呼吸的准确性、精确性均较差,给临床诊断带来一定困难。脉冲震荡法(IOS)是在脉冲震荡下对自主呼吸进行频谱分析,分别测出粘性阻力、弹性阻力、惯性阻力及肺与胸廓顺应性的变化,
Pulmonary function test is one of the important methods to diagnose bronchial asthma. Clinical use of the first second forced expiratory volume (FEV1) or peak flow rate (PEF) rate of change as an important indicator of bronchial asthma. However, children, especially young children, do not always cooperate well with routine pulmonary function tests. Even in the awake state, the accuracy and precision of breathing are poor, which brings some difficulties in clinical diagnosis. Pulse Oscillatory (IOS) is the spectrum analysis of spontaneous respiration under pulse oscillation, and the change of viscous resistance, elastic resistance, inertial resistance and lung and thoracic compliance are respectively measured.