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小儿哮喘的肺功能检查正如高血压病人的血压测量那样，在本病的诊断和处理中是很必要的。临床上在考虑小儿哮喘的诊断时，应常规检测ＦＶＣ，ＦＥＶ１，ＦＥＦ０．２５～０．７５及ＰＥＦＲ，必要时行气道高反应性的测定。对于婴幼儿哮喘，近年来开展了强力振动技术，多次阻断技术及快速胸腹挤压技术等，以测量其气道阻力、顺应性或气道阻塞程度。目前，强调对于中、重度哮喘患儿，家中应常规备有简易而实用的呼气高峰流量计，以便长期监测病情和指导治疗。
Pulmonary function tests in pediatric asthma, as measured by blood pressure in hypertensive patients, are necessary in the diagnosis and management of this condition. Clinical diagnosis of pediatric asthma should be routinely detected FVC, FEV1, FEF0.25 ~ 0.75 and PEFR, if necessary, airway hyperresponsiveness determination. For infant asthma, in recent years carried out a strong vibration technique, multiple blocking techniques and rapid thoracoabdominal extrusion techniques to measure the airway resistance, compliance or degree of airway obstruction. At present, it is emphasized that for children with moderate or severe asthma, the home should be routinely equipped with a simple and practical peak expiratory flow meter in order to long-term monitoring of the disease and guide the treatment.