成都地区446例正常儿童呼气峰流速正常值探讨

目的 探讨成都地区4.0～14.0岁儿童呼气峰流速的正常值及特点.方法 2011年11月至2012年5月以成都地区446例健康儿童为研究对象,采用呼气峰流速仪及肺功能仪进行肺通气功能测量,参考美国胸科协会（ATS）标准测定呼气峰流速,并对各实测指标作LMS回归,得出预计方程式,探讨其特点.结果 呼气峰流速仪与肺功能仪对呼气峰流速的检测有很好的相关性（r=0.920,P＜ 0.01）,男性儿童高于女性儿童,呼气峰流速与身高关系最密切,其次为体质量、年龄.呼气峰流速随年龄、身高的增长而增长.部分正常儿童呼气峰流速值低于80％正常值下限.将身高、年龄代入预计方程式得出相应的呼气峰流速值.结论 呼气峰流速与身高的关系最为密切.建立了成都地区儿童简易呼气峰流速仪及肺功能仪测定呼气峰流速的预计方程式.

Detection of peak expiratory flow in 446 healthy children in Chengdu

Objective To explore the reference values of peak expiratory flow （PEF） for 4.0-14.0 years old children in Chengdu.Methods From November 2011 to May 2012,a total of 446 healthy children were enrolled in this study.PEF was measured using expiratory peak velocimeter and lung function meter.Children＆#39;s age,sex,height and weight were recorded.Impact factors for PEF were investigated by multiple stepwise regression analysis.Results The PEF detected by expiratory peak velocimeter and lung function meter had a good correlation （r =0.920,P 〈 0.01）.Boys own higher peak expiratory flow rate than girls.The level of PEF had the best correlation with height,next was weight and age.The level of PEF increased with the increase of height,age.Some children PEF value was less than 80% lower limits of lower limits of normal.The PEF could be obtained from height and age.Conclusions Males and females PEF can be calculated according to children＆#39;s height.Set up the PEF equation about the expiratory peak velocimeter and lung function meter.