Institute of Biomedical Technologies, Auckland University of Technology, Auckland, New Zealand.
J Biomech. 2013 Feb 1;46(3):506-10. doi: 10.1016/j.jbiomech.2012.10.021. Epub 2012 Nov 10.
Theoretically the auscultatory method using Korotkoff sounds is more related to the maximum artery closure status, while the oscillometric method is more related to the overall artery closure status under the cuff. Therefore, the latter is less accurate than the former. This work introduces a new method, which is more accurate than the oscillometric method and suitable for automatic devices. To monitor the maximum artery closure status, a piezoelectric film sensor is attached to the skin just above the brachial artery and under the central section of the cuff where maximum cuff pressure is transferred to the arm. Using the waveform features obtained by this sensor, measurement errors of 0.7±2.5 and 1.27±4.53 mmHg were obtained for the systolic and diastolic pressure, respectively. These reflect small deviations from auscultatory clinical data.
从理论上讲，听诊法使用的柯氏音与动脉的最大关闭状态更相关，而示波法与袖带下动脉的整体关闭状态更相关。因此，后者不如前者准确。本工作介绍了一种新方法，该方法比示波法更准确，适用于自动设备。为了监测最大动脉关闭状态，将一个压电薄膜传感器贴在肱动脉上方和袖带中央部分的皮肤，此处最大袖带压力传递到手臂。使用该传感器获得的波形特征，收缩压和舒张压的测量误差分别为 0.7±2.5mmHg 和 1.27±4.53mmHg。这些反映了与听诊临床数据的微小偏差。
