一种新型血压测量装置设计及其辨识方法的研究

Study on the Design and Detection Method of a Novel Blood Pressure Measurement System

根据水银血压计测量的柯氏音原理,设计了一种新的基于听诊法电子血压测量系统:利用嵌入在电子血压计装置内部的微小拾音器,通过连通器直接拾取来自袖带耦合到的柯氏音信号;血压参数辨识算法则根据柯氏音与脉搏波时相的一致性,采用柯氏音能量幅度积计算每个脉搏对应柯氏音的特征值,并利用柯氏音特征值类聚法进行归类以确定其时相位置并最终得到血压值。经比对实验和统计分析表明,该血压测量装置与标准水银血压测量方法具有良好的一致性和准确性。

A novel blood pressure measurement system was designed which based on auscultatory method. And the electret sensor that embedded into the internal instrument can detect the Korotkoff-sound signal directly which is coupled by the cuff and transmitted in the cross connection. The BP values identification algorithm is based on combined detection of Korotkoff-sound and pulse signal, and the products of amplitudes and energies are calculated as the characteristic values of Korotkoff-sound, and the Korotkoff-sound phases are classified and detected by means of clustering of characteristic values, and then BP parameters are determined. The contrast test and statistical analysis showed good consistency and accuracy between the new BP detection method and conventional mercury sphygmomanometer.