Methods for calculating non-baseline part and baseline of fetal heart rate curve

Abstract

The invention discloses a method for calculating a non-baseline part of a fetal heart rate curve. The method is characterized in that a non-baseline section is characterized in that the maximum offset between the fetal heart rate value and a base value of the non-baseline section is not less than Dmin, and the duration time is not shorter than Tmin and not longer than Tmax; a suspected non-baseline section is characterized in that the maximum offset between the fetal heart rate value and a base value of the suspected non-baseline section is not less than Dmin, and the duration time is longer than Tmax; for the suspected non-baseline section, the base value bmp of the suspected non-baseline section is adjusted each time, so that the duration time of the suspected non-baseline section is shortened, and then whether the suspected non-baseline section meets the characteristics of the non-baseline section is judged again. According to the methods for calculating the non-baseline part and a baseline of the fetal heart rate curve, the fetal heart rate curve baseline can be accurately recognized especially for the fetal heart rate curve in which acceleration and deceleration frequently occur, and the problem that the baseline can not be accurately estimated through an algorithm based on a numerical treatment method is solved. Meanwhile, the method is high in calculation efficiency, and solves the problem that an algorithm based on an artificial intelligence method is low in efficiency.

Description

technical field [0001] The invention relates to the fields of biomedical signal processing and electronic fetal monitoring, in particular to a calculation method for a non-baseline portion of a fetal heart rate curve and a baseline. Background technique [0002] Fetal electronic monitoring is mainly through continuous observation and recording of changes in fetal heart rate to determine the safety of the fetus in utero. Changes in fetal heart rate are the result of fetal central nervous system regulation. The fetal heart rate curve is a record of fetal heart rate changes over a period of time, and it mainly includes four important parameters: baseline, variation, acceleration and deceleration. By reading and identifying these parameters, obstetric medical staff can timely grasp the status of fetal development in utero and make clinical decisions. Among these parameters, the fetal heart rate baseline is the most critical parameter, and the rest of the parameters need to be ...

AI Technical Summary

Problems solved by technology

Each method has its own advantages and disadvantages: 1. The first method has high calculation efficiency, but sometimes there will be large errors in the baseline obtained, such as for the fetal heart rate curve with continuous acceleration or deceleration, the obtained The baseline tends to increase or decrease; 2. The second method can effectively improve the shortcomings of the first method, but its calculation efficiency is low, and it is not suitable for occasions with high real-time requirements

In the current calculation method of FHR baseline, the distinction between the baseline part and the non-baseline part of the FHR curve is not clear, which will affect the calculation of the baseline and reduce the accuracy of the baseline.

Images