An improved phonocardiographic method for fetal heart rate monitoring

F. Kovács, M. Tõrõk
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引用次数: 11

Abstract

An improved method for acoustical FHR monitoring is presented reducing the number and length of the faulty sections of the FHR diagram in the case of high disturbances. The method applies an adaptive correlation on the abstracted form of the detected signal power, measured on two frequency channels, furthermore, it utilizes the statistical relations of the time difference between the first and second heart sound, finally, a certainty factor is introduced to enable previous timing data as prediction. The method was justified by comparing of large number of measurements to the simultaneous ultrasound tests. The implementation of the method in a portable electronic circuit enables the long-term FHR monitoring on a fully passive manner.
一种用于胎儿心率监测的改进心音图方法
提出了一种改进的声FHR监测方法,减少了高干扰情况下FHR图故障段的数量和长度。该方法对在两个频率通道上测量的被测信号功率的抽象形式进行自适应相关,利用第一心音和第二心音时间差的统计关系,最后引入确定性因子使先前的定时数据能够作为预测。通过将大量测量结果与同时进行的超声检测结果进行比较,证明了该方法的合理性。该方法在便携式电子电路中的实施能够以完全无源的方式长期监测FHR。
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