Pennock B E
Pulmonary Division, Allegheny General Hospital, Pittsburgh, PA 15212.
J Clin Monit. 1990 Oct;6(4):276-83. doi: 10.1007/BF02842487.
Piezoelectric film-based respiratory belts are described and tested. To the extent that a two-degree of freedom model consisting of rib cage and abdominal motion is able to assist in quantifying ventilation, the piezoelectric belts can monitor flow in a manner analogous to the monitoring of volume with two magnetometer pairs or two respiratory inductive plethysmograph belts. The piezoelectric belts are shown to measure flow linearly when compared with a screen pneumotachometer to a flow of at least 2.6 L/s. There is no phase shift between the peak flow of belts and the pneumotachometer up to a frequency of at least 9.2 Hz. During normal ventilation, 68 and 95% of the peak flows measured with the belts fall within +/- 10 and 20%, respectively, of the flows measured with a screen pneumotachometer.
描述并测试了基于压电薄膜的呼吸带。就由胸廓和腹部运动组成的二自由度模型能够辅助量化通气而言，压电带能够以类似于用两对磁力计或两条呼吸感应体积描记带监测容积的方式来监测气流。与屏幕式呼吸流速计相比，压电带在至少2.6 L/s的气流下呈线性测量气流。在至少9.2 Hz的频率范围内，带的峰值气流与呼吸流速计之间没有相位偏移。在正常通气期间，用这些带测量的峰值气流分别有68%和95%落在屏幕式呼吸流速计测量气流的±10%和±20%范围内。
