Perks W H, Cole M, Steventon R D, Tams I P, Prowse K
Br J Dis Chest. 1981 Apr;75(2):161-4. doi: 10.1016/0007-0971(81)90048-6.
The Vitalograph pulmonary monitor has recently been altered by the manufactures to read in litres per minute. In 200 pairs of measurements comparing the monitor to the Wright peak flow meter (PFM) the mean difference between the instrument was 0.57 litres/min and there was a strong positive correlation (r = 0.92). The mean within subject coefficient of variation was 5.8% (range 2.6% to 10.7%). There was a statistical difference (P less than 0.05) in measurements obtained with different monitors but in practical terms this difference was small. The monitor is pocket-sized and light and is therefore suitable for following changes in peak expiratory flow away from the physiology laboratory.
维达肺活量计最近已由制造商进行了改装，以读取每分钟升数。在将该仪器与赖特峰值流量计（PFM）进行比较的200组测量中，两种仪器之间的平均差异为0.57升/分钟，且存在强正相关（r = 0.92）。受试者内变异系数的平均值为5.8%（范围为2.6%至10.7%）。使用不同仪器获得的测量结果存在统计学差异（P<0.05），但实际上这种差异很小。该仪器为口袋大小且轻便，因此适合于在生理实验室之外追踪呼气峰值流量的变化。
