Chiaramonte L T, Prabhu S L
J Allergy Clin Immunol. 1982 Jun;69(6):509-15. doi: 10.1016/0091-6749(82)90175-0.
The Wright peak flow meter (WPFM), the pediatric WPFM, the mini-WPFM (MWPFM), the Vitalograph pulmonary monitor (VPM), and prototypes of the newly designed peak flow whistle (PFW) were evaluated and compared under controlled laboratory conditions. With steady flows, all devices compared significantly with the pneumotachygraph standard (p less than 0.001). At transient flows there was distortion of the wave form by the VPM, with significant reduction in the generated peak flow. All devices except the PFW demonstrated progressive increases in resistance with higher flows. The PFW showed a progressive decrease. The WPFM and the pediatric WPFM demonstrated adequate calibration corrections for this increasing resistance. The MWPFM gave slightly higher values than the pneumotachygraph and graph standard. Results with all devices were found to be reproducible after 350 pulses of transient flow of 4 L/sec and no interinstrument variance was detected in the paired devices. Flow values measured at air temperature of 37 degree C tended to be lower than those measured at 28 degree C, but this was not significant at the p less than 0.05 level.
在可控的实验室条件下，对赖特峰流速仪（WPFM）、儿童用WPFM、微型WPFM（MWPFM）、维托拉呼吸监测仪（VPM）以及新设计的峰流速哨（PFW）原型进行了评估和比较。在稳定气流情况下，所有设备与呼吸流速仪标准相比均有显著差异（p小于0.001）。在瞬态气流时，VPM出现波形失真，所产生的峰流速显著降低。除PFW外，所有设备随着流速增加阻力都逐渐增大。PFW则呈逐渐减小趋势。WPFM和儿童用WPFM针对这种阻力增加表现出了适当的校准校正。MWPFM给出的值略高于呼吸流速仪和图表标准。在4升/秒的瞬态气流进行350次脉冲后，发现所有设备的结果均可重复，并且在配对设备中未检测到仪器间差异。在37摄氏度气温下测得的流速值往往低于在28摄氏度时测得的值，但在p小于0.05水平时这并不显著。
