Godschalk I, Brackel H J, Peters J C, Bogaard J M
Department of Pulmonary Diseases, University Hospital Dijkzigt, Erasmus University, Rotterdam, The Netherlands.
Respir Med. 1996 Nov;90(10):619-22. doi: 10.1016/s0954-6111(96)90020-7.
A pocked-sized turbine flowmeter and spirometer device, integrated with an electronic diary card (EDC-spirometer, Micro Medical, U.K.), was tested with a mechanical calibrator, in an outpatient clinic and in the home situation. A screen pneumotachometer was used as flow and volume reference. Ten devices were tested; interdevice variability was small with a mean variation coefficient of 1.1% for both forced expiratory volume in 1 s (FEV1) and peak expiratory flow (PEF) (SD 0.5 and 0.4, respectively) for eight settings of the calibrator. Mean difference from reference was -0.13 l (SD 0.04) for FEV1 (range 0.38-3.16) and 0.09 l s-1 (SD 0.09) for PEF (range 4.2-11.7). No significant deviation from linearity was present. Results obtained in the outpatient clinic confirmed the accuracy of FEV1 and PEF data obtained with the calibrator. However, linear regression analysis showed a mean underestimation of 0.45 l (SD of estimate 0.29) for forced vital capacity over the whole measurement range, probably due to a restricted integration time. In 10 optimally-treated chronic obstructive pulmonary disease patients in a family practice, PEF measurements were done in the home situation, both with the EDC spirometer and a mini-Wright peak flow meter. No significant differences in the diurnal variation of PEF were found. The PEF data from the mini-Wright meter were corrected for earlier reported flow-dependent systematic deviations. In the home situation, patients preferred the EDC spirometer. It is concluded that this device is applicable in the follow-up and treatment of asthma at home.
一款口袋大小的涡轮流量计和肺活量计设备，与电子日记卡（EDC-肺活量计，英国微型医疗公司）集成，在门诊诊所和家庭环境中使用机械校准器进行了测试。使用屏幕式呼吸流速计作为流量和容积参考。测试了十台设备；在校准器的八种设置下，设备间的变异性较小，一秒用力呼气量（FEV1）和呼气峰值流速（PEF）的平均变异系数均为1.1%（标准差分别为0.5和0.4）。FEV1与参考值的平均差值为-0.13升（标准差0.04）（范围为0.38 - 3.16），PEF为0.09升·秒⁻¹（标准差0.09）（范围为4.2 - 11.7）。未出现明显的线性偏差。在门诊诊所获得的结果证实了使用校准器获得的FEV1和PEF数据的准确性。然而，线性回归分析显示，在整个测量范围内，用力肺活量平均低估了0.45升（估计标准差0.29），这可能是由于积分时间受限所致。在一家家庭诊所的10名接受最佳治疗的慢性阻塞性肺疾病患者中，在家庭环境中使用EDC肺活量计和小型赖特峰值流量计进行了PEF测量。未发现PEF昼夜变化的显著差异。对小型赖特流量计的PEF数据进行了校正，以消除先前报道的流量依赖性系统偏差。在家庭环境中，患者更喜欢EDC肺活量计。结论是，该设备适用于哮喘的家庭随访和治疗。
