Brand P L, Waalkens H J, Duiverman E J, van Essen-Zandvliet E E
Department of Paediatric Pulmonology, Beatrix Children's Hospital, Groningen, The Netherlands.
Acta Paediatr. 1997 Aug;86(8):888-9. doi: 10.1111/j.1651-2227.1997.tb08616.x.
This study examined whether correction of peak expiratory flow (PEF) values for the inaccuracy of the meter would affect asthma management in 102 children (7-14 y old). PEF was recorded with a mini Wright meter twice daily for 2 weeks. As expected, measured PEF overestimated PEF level and asthma control in these children on many diary days. The actual numerical differences between measured and corrected PEF on these days were very small (>5% in only five patients, maximum 10%). It is unlikely that such small changes in PEF justify changes in asthma management, even if these changes cause PEF levels to cross arbitrary borders between various levels of asthma control used in self-management plans. The clinical importance of the inaccuracy of portable PEF meters is negligible.
本研究调查了针对测量仪不准确情况校正呼气峰值流速（PEF）值是否会影响102名7至14岁儿童的哮喘管理。使用小型赖特流速仪每天记录两次PEF，持续2周。正如预期的那样，在许多日记记录日中，这些儿童的测量PEF高估了PEF水平和哮喘控制情况。在这些日子里，测量PEF与校正后PEF之间的实际数值差异非常小（仅5名患者差异>5%，最大差异为10%）。即使这些变化导致PEF水平跨越自我管理计划中用于划分不同哮喘控制水平的任意界限，如此小的PEF变化也不太可能成为改变哮喘管理的理由。便携式PEF测量仪不准确的临床重要性可忽略不计。
