基于压差式流量传感器的便携式肺功能仪的重复性研究

Reproducibility of a Portable Spirometer Based on Differential Pressure Sensor

目的评估基于压差式流量传感器的便携式肺功能仪的重复性,包括操作者间重复性及日间重复性。方法两位操作者分别对22名健康志愿者进行肺通气功能测定,24h后由第一位操作者再进行一次肺通气功能测定。结果两位操作者间及日间各指标的ICC均大于0.75,且差异无统计学意义(P>0.05);Bland-Altman图示所有数据中只有1-2个数据位于一致性范围以外。结论基于压差式流量传感器的便携式肺功能仪重复性很好,可用于临床肺功能检测。

Objective Assessing the reproducibility of a portable spirometer, including repoducibility of inter-observer and day- today. Methods Lung ventilation function was performed in 22 healthy volunteers by two observers on the same day and repeated by the first observer after 24h. Results The inter-observer and day-to-day intra-class correlation coefficients are all higher than 0.75. There are no significant difference between each other. Bland-Altman chart shows good limits of agreement between inter-observer and day-to-day, only scattered data are outside of the limits of agreement. Conclusions The portable spirometer shows good inter-observer and day-to-day reproducibility, and can be used for testing lung function in clinical.