Dahl S
Ugeskr Laeger. 1990 Mar 12;152(11):723-6.
Peak flow monitoring (PEFM) consists of repeated measurements of the peak expiratory flow rate (PEF) frequently measured by means of small transportable peak flow metres which have proved sufficiently accurate for registration of alterations in PEF. In the majority of persons, not only asthmatics but also healthy individuals, characteristic diurnal variations in PEF are found. The variation amplitude is greatest in asthmatics. The scientific basis for the proposed norms and standards is incomplete but suggests that normal daily variations in PEF are less than 15-20%, calculated as the difference between the highest and lowest daily values as a percentage of the highest. At least 2-4 daily measurements should be made to obtain a reliable picture of the pattern of variation.
峰值流速监测（PEFM）包括反复测量呼气峰值流速（PEF），通常使用小型便携式峰值流速仪进行测量，这种仪器已被证明对记录PEF的变化足够准确。在大多数人（不仅是哮喘患者，还有健康个体）中，都发现了PEF的特征性昼夜变化。哮喘患者的变化幅度最大。所提议的规范和标准的科学依据并不完整，但表明PEF的正常每日变化小于15 - 20%，计算方法是将每日最高值与最低值之间的差值作为最高值的百分比。应至少进行2 - 4次每日测量，以获得变化模式的可靠情况。
