阅读说明：本技术 一种母胎混合心电信号的显示方法及装置 (Method and device for displaying mother-fetus mixed electrocardiosignals ) 是由 饶箭 于 2019-09-16 设计创作，主要内容包括：本发明公开了一种母胎混合心电信号的显示方法及装置,该方法包括：获取母胎混合心电信号；识别母胎混合心电信号中的母体QRS波段和胎儿QRS波段；根据母体QRS波段和胎儿QRS波段,计算母体QRS波段和胎儿QRS波段的幅度比；根据幅度比缩放母体QRS波段和/或胎儿QRS波段,得到缩放后的混合心电信号,显示缩放后的混合心电信号的波形曲线。通过从获取的母胎混合心电信号中得到母体QRS波段和胎儿QRS波段的幅度比,然后根据幅度比对母胎混合心电信号进行缩放,使缩放后显示的波形曲线中母体QRS波段和胎儿QRS波段维持一定的幅度比,保证波形曲线能够突出胎儿QRS波段,利于用户观察,也节省了屏幕空间和资源占用。(The invention discloses a method and a device for displaying mother-fetus mixed electrocardiosignals, wherein the method comprises the following steps: acquiring maternal-fetal mixed electrocardiosignals; identifying a maternal QRS wave band and a fetal QRS wave band in the maternal-fetal mixed electrocardiosignals; calculating the amplitude ratio of the maternal QRS wave band and the fetal QRS wave band according to the maternal QRS wave band and the fetal QRS wave band; and zooming the parent QRS wave band and/or the fetus QRS wave band according to the amplitude ratio to obtain a zoomed mixed electrocardiosignal, and displaying a waveform curve of the zoomed mixed electrocardiosignal. The amplitude ratio of the parent QRS wave band and the fetal QRS wave band is obtained from the obtained maternal-fetal mixed electrocardiosignals, and then the maternal-fetal mixed electrocardiosignals are zoomed according to the amplitude ratio, so that the certain amplitude ratio of the parent QRS wave band and the fetal QRS wave band in the zoomed displayed waveform curve is maintained, the waveform curve can be ensured to be capable of highlighting the fetal QRS wave band, the observation of a user is facilitated, and the screen space and the resource occupation are also saved.)

1. A method for displaying mixed electrocardiosignals of mother and fetus is characterized by comprising the following steps:

acquiring maternal-fetal mixed electrocardiosignals;

identifying a maternal QRS wave band and a fetal QRS wave band in the maternal-fetal mixed electrocardiosignal;

calculating the amplitude ratio of the maternal QRS wave band and the fetal QRS wave band according to the maternal QRS wave band and the fetal QRS wave band;

and zooming the maternal QRS wave band and/or the fetal QRS wave band according to the amplitude ratio to obtain a zoomed mixed electrocardiosignal, and displaying a waveform curve of the zoomed mixed electrocardiosignal.

2. The method for displaying a maternal-fetal mixed electrocardiosignal according to claim 1, wherein the identifying the maternal QRS wave band and the fetal QRS wave band in the maternal-fetal mixed electrocardiosignal comprises:

preprocessing the maternal-fetal mixed electrocardiosignals to obtain preprocessed maternal-fetal mixed electrocardiosignals;

identifying a parent QRS wave band in the preprocessed maternal-fetal mixed electrocardiosignals;

and identifying a fetal QRS wave band in the preprocessed maternal-fetal mixed electrocardiosignal according to the identified maternal QRS wave band.

3. The method for displaying mixed maternal and fetal cardiac signals according to claim 2, wherein said calculating the ratio of the amplitudes of said maternal QRS band and said fetal QRS band based on said maternal QRS band and said fetal QRS band comprises:

calculating the amplitude a1 of the maternal QRS band closest to the current time point and the amplitude a2 of the fetal QRS band closest;

the ratio of the amplitude a1 to the amplitude a2 is taken as the amplitude ratio p.

4. The method for displaying mixed maternal and fetal cardiac signals according to claim 2, wherein said calculating the ratio of the amplitudes of said maternal QRS band and said fetal QRS band based on said maternal QRS band and said fetal QRS band comprises:

calculating the amplitude average value B1 of the maternal QRS wave band and the amplitude average value B2 of the fetal QRS wave band respectively;

the ratio of the amplitude average value B1 to the amplitude average value B2 is calculated as an amplitude ratio p.

5. The method for displaying maternal-fetal mixed electrocardiosignals according to claim 4, wherein the average value B1 of the amplitudes of the maternal QRS wave bands is calculated according to the amplitudes of the maternal QRS wave bands within a latest preset time range or a preset number; the average value of the amplitudes of the fetal QRS bands B2 is calculated based on the amplitudes of the most recent pre-determined time frame or a pre-determined number of fetal QRS bands.

6. The method for displaying mother-fetus mixed electrocardiosignals according to claim 4, wherein the average value B1 of the amplitudes of the maternal QRS wave bands is calculated according to the amplitudes of all the maternal QRS wave bands displayed in the current screen; the average value of the amplitudes of said fetal QRS bands B2 is calculated from the amplitudes of all of said fetal QRS bands displayed in the current screen.

7. The method for displaying mixed maternal and fetal cardiac signals as claimed in any one of claims 3 to 6, wherein scaling said maternal QRS band and/or said fetal QRS band according to said amplitude ratio to obtain a scaled mixed cardiac signal, and displaying a waveform curve of said scaled mixed cardiac signal comprises:

presetting an ideal amplitude ratio q of the maternal QRS wave band and the fetal QRS wave band;

establishing a rectangular coordinate system in a drawing area, and drawing data points of the mother-fetus mixed signals in real time;

detecting whether the current data point is the data point of the parent QRS wave band, and if the data point is not the data point of the parent QRS wave band, performing point tracing drawing on the current data point; if the data point is the data point of the parent QRS wave band, multiplying the current data point by q/p to obtain a new data point, and then drawing the new data point; or

Detecting whether the current data point is the data point of the fetal QRS wave band, and if the data point is not the data point of the maternal QRS wave band, performing tracing drawing by using the current data point; and if the data point is the data point of the parent QRS wave band, multiplying the current data point by p/q to obtain a new data point, and then performing point drawing by using the new data point.

8. The method for displaying maternal-fetal mixed electrocardiosignals according to claim 7, wherein in the step of detecting whether the current data point is the data point of the fetal QRS wave band, when the current data point is the data point of the fetal QRS wave band, the waveform curves of the mixed electrocardiosignals are displayed in curves with different characteristics.

9. The method for displaying maternal-fetal mixed electrocardiosignals according to claim 7, wherein in the process of detecting whether the current data point is the data point of the maternal QRS wave band or the data point of the fetal QRS wave band, when the current data point is detected to be the data point of the maternal QRS wave band or the data point of the fetal QRS wave band, a mark is made to indicate that the current corresponding wave band of the data point is the maternal QRS signal or the fetal QRS signal.

10. A display device for mixed electrocardiosignals of mother and fetus is characterized by comprising:

the acquisition unit is used for acquiring maternal-fetal mixed electrocardiosignals;

the analysis unit is connected with the acquisition unit and is used for analyzing the acquired maternal-fetal mixed electrocardiosignals and identifying a maternal QRS wave band and a fetal QRS wave band from the maternal-fetal mixed electrocardiosignals;

the calculating unit is connected with the maternal-fetal mixed electrocardiosignal analyzing unit and is used for calculating the amplitude ratio of the maternal QRS wave band and the fetal QRS wave band according to the identified maternal QRS wave band and the identified fetal QRS wave band;

and the drawing unit is connected with the calculating unit and is used for zooming the parent QRS wave band and/or the fetus QRS wave band according to the amplitude ratio to obtain a zoomed mixed electrocardiosignal and displaying a waveform curve of the zoomed mixed electrocardiosignal.

11. A maternal and fetal monitoring device comprising a display device, a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the method for displaying a maternal and fetal mixed electrocardiographic signal according to any one of claims 1 to 9 when executing the computer program, the display device displaying a waveform curve of the scaled mixed electrocardiographic signal.

12. A computer-readable storage medium storing computer instructions for causing a computer to execute the method for displaying a maternal-fetal mixed electrocardiographic signal according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of medical monitoring, in particular to a method and a device for displaying maternal and fetal mixed electrocardiosignals.

Background

The body surface fetal electrocardio technology is a technical means for non-invasively and simultaneously monitoring maternal electrocardio and fetal electrocardio, an electrocardioelectrode is attached to the body surface of a mother body to obtain mixed electrocardiosignals of the mother and the fetus, then the mixed electrocardiosignals of the mother and the fetus are filtered, identified and separated to further obtain the electrocardiosignals of the mother and the fetus, and finally the electrocardiosignals of the mother and the fetus are respectively analyzed to obtain a waveform analysis result and a heart rate monitoring result.

The collected maternal-fetal mixed electrocardiosignals are generally drawn into waveforms clinically, so that a user can observe the forms of the maternal electrocardiosignals and the fetal electrocardiosignals, and the user can judge the collection quality of the current signals according to the stability of waveform display so as to guide the user to adjust the electrode position or check the electrode connection state in time.

However, because the fetal electrocardiosignals are weak, generally between 5 uV-50 uV, only about 1/10 of the maternal electrocardiosignals, if the maternal electrocardiosignals and the fetal electrocardiosignals are directly displayed on the same waveform curve by the same scale standard, the fetal electrocardiosignals are very small, so that the fetal electrocardiosignals are difficult to observe from the waveform curve, and the observation and the judgment of the user on the fetal electrocardiosignals are influenced. If the maternal electrocardiosignal and the fetal electrocardiosignal are split into two coordinate systems to independently draw the waveform for display, more screen space is occupied, and more hardware resources are consumed.

Disclosure of Invention

In view of the above, the present invention provides a method and an apparatus for displaying mixed maternal-fetal electrocardiosignals, so as to solve the technical problem in the prior art that it is inconvenient to draw a waveform curve of the mixed maternal-fetal electrocardiosignals in the same coordinate system as the maternal-fetal electrocardiosignals due to very small fetal electrocardiosignals.

According to a first aspect, the invention provides a method for displaying maternal-fetal mixed electrocardiosignals, which comprises the following steps:

acquiring maternal-fetal mixed electrocardiosignals;

identifying a maternal QRS wave band and a fetal QRS wave band in the maternal-fetal mixed electrocardiosignal;

calculating the amplitude ratio of the maternal QRS wave band and the fetal QRS wave band according to the maternal QRS wave band and the fetal QRS wave band;

and zooming the maternal QRS wave band and/or the fetal QRS wave band according to the amplitude ratio to obtain a zoomed mixed electrocardiosignal, and displaying a waveform curve of the zoomed mixed electrocardiosignal.

Further, the identifying a maternal QRS band and a fetal QRS band in the maternal-fetal mixed electrocardiosignal comprises:

preprocessing the maternal-fetal mixed electrocardiosignals to obtain preprocessed maternal-fetal mixed electrocardiosignals;

identifying a parent QRS wave band in the preprocessed maternal-fetal mixed electrocardiosignals;

and identifying a fetal QRS wave band in the preprocessed maternal-fetal mixed electrocardiosignal according to the identified maternal QRS wave band.

Further, said calculating a ratio of amplitudes of said maternal QRS band and said fetal QRS band based on said maternal QRS band and said fetal QRS band comprises: calculating the amplitude a1 of the maternal QRS band closest to the current time point and the amplitude a2 of the fetal QRS band closest; the ratio of the amplitude a1 to the amplitude a2 is taken as the amplitude ratio p.

Further, said calculating a ratio of amplitudes of said maternal QRS band and said fetal QRS band based on said maternal QRS band and said fetal QRS band comprises: calculating the amplitude average value B1 of the maternal QRS wave band and the amplitude average value B2 of the fetal QRS wave band respectively; the ratio of the amplitude average value B1 to the amplitude average value B2 is calculated as an amplitude ratio p.

Further, the average value B1 of the amplitudes of the parent QRS bands is calculated according to the amplitudes of the parent QRS bands within the latest preset time range or a preset number of the parent QRS bands; the average value of the amplitudes of the fetal QRS bands B2 is calculated based on the amplitudes of the most recent pre-determined time frame or a pre-determined number of fetal QRS bands.

Further, the average value of the amplitudes of the maternal QRS band B1 is calculated from the amplitudes of all the maternal QRS bands displayed in the current screen; the average value of the amplitudes of said fetal QRS bands B2 is calculated from the amplitudes of all of said fetal QRS bands displayed in the current screen.

Further, scaling the maternal QRS band and/or the fetal QRS band according to the amplitude ratio to obtain a scaled mixed electrocardiographic signal, and displaying a waveform curve of the scaled mixed electrocardiographic signal, including:

presetting an ideal amplitude ratio q of the maternal QRS wave band and the fetal QRS wave band;

establishing a rectangular coordinate system in a drawing area, and drawing data points of the mother-fetus mixed signals in real time;

detecting whether the current data point is the data point of the parent QRS wave band, and if the data point is not the data point of the parent QRS wave band, performing point tracing drawing on the current data point; if the data point is the data point of the parent QRS wave band, multiplying the current data point by q/p to obtain a new data point, and then drawing the new data point; or

Detecting whether the current data point is the data point of the fetal QRS wave band, and if the data point is not the data point of the maternal QRS wave band, performing tracing drawing by using the current data point; and if the data point is the data point of the parent QRS wave band, multiplying the current data point by p/q to obtain a new data point, and then performing point drawing by using the new data point.

Further, in the step of detecting whether the current data point is a data point of the fetal QRS band, when the current data point is detected to be a data point of the fetal QRS band, a waveform curve of the mixed electrocardiosignal is displayed with curves of different characteristics.

Further, in the detecting whether the current data point is the data point of the maternal QRS band or the data point of the fetal QRS band, when the current data point is detected to be the data point of the maternal QRS band or the data point of the fetal QRS band, marking to indicate that the current corresponding band of the data point is a maternal QRS signal or a fetal QRS signal.

According to a second aspect, the present invention further provides a display device for mixed maternal and fetal cardiac signals, comprising:

the acquisition unit is used for acquiring maternal-fetal mixed electrocardiosignals;

the analysis unit is connected with the acquisition unit and is used for analyzing the acquired maternal-fetal mixed electrocardiosignals and identifying a maternal QRS wave band and a fetal QRS wave band from the maternal-fetal mixed electrocardiosignals;

the calculating unit is connected with the maternal-fetal mixed electrocardiosignal analyzing unit and is used for calculating the amplitude ratio of the maternal QRS wave band and the fetal QRS wave band according to the identified maternal QRS wave band and the identified fetal QRS wave band;

and the drawing unit is connected with the calculating unit and is used for zooming the parent QRS wave band and/or the fetus QRS wave band according to the amplitude ratio to obtain a zoomed mixed electrocardiosignal and displaying a waveform curve of the zoomed mixed electrocardiosignal.

According to a third aspect, an embodiment of the present invention further provides a maternal and fetal monitoring device, including a display device, a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the method for displaying mixed electrocardiographic signals of a maternal and fetal heart, and the display device displays a waveform curve of the scaled mixed electrocardiographic signals.

According to a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where computer instructions are stored, and the computer instructions are configured to cause the computer to execute the above-mentioned method for displaying maternal-fetal mixed electrocardiosignals.

The technical scheme of the invention has the following advantages:

1. the method for displaying the maternal-fetal mixed electrocardiosignals, provided by the invention, comprises the steps of obtaining and identifying a maternal QRS wave band and a fetal QRS wave band in the maternal-fetal mixed electrocardiosignals in real time, and zooming the maternal-fetal mixed electrocardiosignals according to the amplitude ratio of the maternal QRS wave band and the fetal QRS wave band to obtain a waveform curve of the zoomed mixed electrocardiosignals; in the waveform curve of the zoomed mixed electrocardiosignal, the mother QRS wave band and the fetus QRS wave band always maintain a certain amplitude ratio, so that the waveform curve can highlight the fetus QRS wave band, the observation of a user is facilitated, and the screen space and the resource occupation of display equipment are saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a flowchart illustrating an implementation of a method for displaying an electrocardiographic signal of a fetus on a body surface according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a step S20 of the method for displaying the electrocardiogram signals of the fetus on the body surface according to the embodiment of the present invention;

fig. 3 is a flowchart illustrating an implementation of identifying a mother QRS band and a fetus QRS band from a mother-fetus mixed electrocardiograph signal according to an embodiment of the present invention;

FIG. 4 is a flow chart of an implementation of a method for plotting a waveform curve according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a device for displaying an electrocardiographic signal of a fetus on a body surface according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a hardware structure of a mother-child monitoring device according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The application provides a method for displaying maternal-fetal mixed electrocardiosignals, which can be applied to various electronic devices, wherein the devices are provided with electrocardiosignal acquisition and analysis modules and used for acquiring and analyzing biological electrocardiosignals. The electronic devices may include, but are not limited to, computers, smart phones, electrocardiographs, wearable electrocardiograph acquisition devices, monitors, and the like.