Shapiro S M, Hendler J M, Ogirala R G, Aldrich T K, Shapiro M B
Department of Medicine, Montefiore Medical Center, Bronx, NY 10467.
Chest. 1991 Feb;99(2):358-62. doi: 10.1378/chest.99.2.358.
With the advent of small inexpensive peak flowmeters, the at-home monitoring of peak flow rates has become an invaluable aid in the treatment of asthmatic patients. In this study, we evaluated the performance of the MiniWright and Assess peak flowmeters for accuracy and reproducibility. Measurements were made at varying peak flow rates and compared with those obtained simultaneously by a calibrated pneumotachograph. When this segment of the study was completed, the peak flow devices were subjected to 200 uses and were then retested. Four MiniWright peak flowmeters that had been extensively used in our clinic were tested as well. The Assess peak flowmeter was more accurate than the MiniWright at low flow rates (less than 300 L/min), while the MiniWright meter was more accurate at high flow rates (greater than 400 L/min). We also found that the accuracy of the MiniWright meter deteriorated after 200 uses and worsened further after extensive use, while the Assess meter retained its accuracy after 200 uses.
随着小型廉价峰值流量计的出现，在家中监测峰值流速已成为治疗哮喘患者的一项极有价值的辅助手段。在本研究中，我们评估了MiniWright和Assess峰值流量计的准确性和可重复性。在不同的峰值流速下进行测量，并与通过校准的呼吸流速计同时获得的测量结果进行比较。当这部分研究完成后，对峰值流量装置进行了200次使用测试，然后重新进行测试。还对我们诊所中广泛使用的四台MiniWright峰值流量计进行了测试。在低流速（小于300升/分钟）时，Assess峰值流量计比MiniWright更准确，而在高流速（大于400升/分钟）时，MiniWright流量计更准确。我们还发现，MiniWright流量计在使用200次后准确性下降，在广泛使用后进一步恶化，而Assess流量计在使用200次后仍保持其准确性。
