CN110613435B

CN110613435B - Method for detecting fetal heart rate and uterine contraction pressure

Info

Publication number: CN110613435B
Application number: CN201910878424.0A
Authority: CN
Inventors: 饶箭; 陈德伟; 罗崇; 谭娟鹃
Original assignee: Edan Instruments Inc
Current assignee: Edan Instruments Inc
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2022-09-23
Anticipated expiration: 2039-09-16
Also published as: CN110613435A

Abstract

The invention discloses a method for detecting fetal heart rate and uterine contraction pressure, wherein a monitoring probe comprises: the probe comprises a probe body, a stress sensing device and a control unit, wherein the stress sensing device is installed in the probe body and can be attached to the skin surface of a measured object; the electrocardio sensing device comprises a patch substrate and a sensing electrode arranged on the patch substrate; the patch matrix can be pasted on the skin of an object to be detected, and the sensing electrode is connected to the probe body through a lead wire. The electrocardio sensing device and the stress sensing device are integrated in the probe body, so that the accurate maternal heart rate, fetal heart rate and uterine contraction pressure values can be obtained, the fetal heart and uterine contraction monitoring is completed, and the problems of heavy probe, inconvenience in movement and poor monitoring experience existing in the traditional monitoring mode are solved.

Description

Method for detecting fetal heart rate and uterine contraction pressure

Technical Field

The invention relates to the technical field of medical fetal monitoring, in particular to a method for detecting fetal heart rate and uterine contraction pressure.

Background

Currently, the fetal heart rate and uterine contraction monitoring of the pregnant woman is performed clinically through an ultrasonic sensor and an extrauterine contraction pressure sensor, the ultrasonic sensor is responsible for sending ultrasonic waves to the heart of the fetus and detecting ultrasonic echoes to complete the fetal heart rate, and the extrauterine contraction pressure sensor senses the abdominal pressure change of the pregnant woman through a stress meter to complete the uterine contraction monitoring.

However, in the traditional monitoring mode, the ultrasonic sensor and the uterine contraction pressure sensor are completely independent to each other for detection, and in clinical application, when the two sensors are respectively bound on the abdomen of a pregnant woman through bandages, the whole weight is heavier, and the monitoring experience of the pregnant woman is not good; the probe easily falls or slides when the pregnant woman moves.

Disclosure of Invention

In view of the above, the invention provides a method for detecting fetal heart rate and uterine contraction pressure, so as to solve the problems of heavy probe, inconvenient movement and poor monitoring experience in the traditional monitoring mode.

According to a first aspect, embodiments of the present invention provide a monitoring probe, comprising: the probe comprises a probe body, a probe body and a probe core, wherein a stress sensing device is installed in the probe body, and the stress sensing device can be attached to the surface of the skin of a measured object; the electrocardio sensing device comprises a patch substrate and a sensing electrode arranged on the patch substrate; the patch matrix can be pasted on the skin of an object to be detected, and the sensing electrode is connected to the probe body through a lead wire.

Further, the electrocardio sensing device comprises at least two electrode patches which are not overlapped with the stress sensing device, and each electrode patch comprises the patch matrix and the sensing electrode.

Further, at least two of the electrode patches are each integrally connected to the interior of the probe body.

Furthermore, at least two electrode patches are positioned outside the probe body and are respectively connected to the probe body through the lead wires.

Further, the lead wire extends out of the probe body and points to the direction of the electrode patch attaching position.

Furthermore, the lead wires of at least two electrode patches are connected in a bundle and then connected to the probe body.

According to a second aspect, the embodiment of the present invention further provides a method for detecting a fetal heart rate and a uterine contraction pressure, based on the monitoring probe as described above, including: acquiring a mechanical pressure signal of uterine muscle contraction through a stress sensing device attached to the skin surface of a tested object, and acquiring an abdominal mixed electrocardiosignal of the tested object through an electrocardio sensing device attached to the abdomen of the tested object; according to the obtained abdomen mixed electrocardiosignals, performing separation calculation to obtain a maternal heart rate and a fetal heart rate; obtaining a mechanical uterine pressure value according to the acquired uterine muscle contraction pressure signal; and outputting the calculation results of the maternal heart rate and the fetal heart rate, and drawing a monitoring curve of the uterine contraction pressure according to the mechanical uterine pressure value.

Further, the separating and calculating the maternal heart rate and the fetal heart rate according to the obtained abdomen mixed electrocardiosignals comprises: filtering the mixed electrocardiosignals of the abdomen to obtain fetal electrocardiosignals after interference elimination; carrying out signal envelope processing on the fetal electrocardiosignals to obtain fetal electrocardio envelope signals; identifying a fetal QRS wave band signal in the fetal electrocardio envelope signal, and calculating a fetal heart rate according to the fetal QRS wave band signal; subtracting the fetal QRS wave band signal from the abdomen mixed electrocardiosignal to obtain a maternal electrocardiosignal; carrying out envelope processing on the maternal electrocardiosignals to obtain maternal electrocardio envelope signals; and identifying a parent QRS wave band signal in the parent electrocardio envelope signal, and calculating a parent heart rate according to the parent QRS wave band signal.

Further, the obtaining of the mechanical uterine pressure value according to the obtained uterine muscle contraction pressure signal comprises: carrying out signal envelope processing on the uterine muscle contraction pressure signal to obtain a uterine mechanical pressure envelope signal; and dividing the obtained uterus mechanical pressure envelope signal by an envelope value corresponding to a preset pressure value to obtain a uterus mechanical pressure value.

Further, after obtaining the mechanical uterine pressure value according to the acquired uterine muscle contraction pressure signal, the method further comprises the following steps: performing band-pass filtering processing on the mixed electrocardiosignals of the abdomen to obtain uterine muscle electric signals after interference elimination; carrying out signal envelope processing on the uterine muscle electrical signal after interference elimination to obtain a uterine muscle electrical pressure envelope signal; dividing the uterine muscle electrical pressure envelope signal by an envelope value corresponding to a preset pressure value to obtain a uterine pressure value; and drawing a monitoring curve of the uterine contraction pressure according to the obtained mechanical uterine pressure value and the obtained electrical uterine pressure value.

Further, the drawing a monitoring curve of uterine contraction pressure according to the obtained mechanical uterine pressure value and the obtained electrical uterine pressure value comprises: comparing the obtained uterine electrical pressure value with the uterine mechanical pressure value; when the uterine pressure value is smaller than the mechanical uterine pressure value, drawing a monitoring curve of uterine contraction pressure by taking the uterine pressure value as an output result; when the uterine pressure value is larger than or equal to the uterine mechanical pressure value and the absolute value of the difference value between the uterine mechanical pressure value and the uterine pressure value is within a preset range, drawing a monitoring curve of uterine contraction pressure by taking the uterine mechanical pressure value or the uterine pressure value as an output result; and when the uterus voltage value is larger than the uterus mechanical pressure value and the absolute value of the difference value between the uterus mechanical pressure value and the uterus mechanical pressure value exceeds a preset range, respectively drawing a uterus mechanical pressure curve according to the uterus mechanical pressure value and drawing a uterus voltage curve according to the uterus voltage value.

According to a third aspect, an embodiment of the present invention further provides a mother-child monitoring device, including: the monitoring probe adopts the monitoring probe, the processor executes the computer program to realize the detection method of the fetal heart rate and the uterine contraction pressure, and the display device is used for displaying the calculation structure of the maternal heart rate and the fetal heart rate and the monitoring curve of the uterine contraction pressure.

According to a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions for causing the computer to execute the method for detecting the fetal heart rate and the uterine contraction pressure as described above.

The technical scheme of the invention has the following advantages:

1. according to the monitoring probe, the electrocardio sensing device is integrated on the probe body through the lead wire, so that the number of probes required to be worn in the monitoring process of a pregnant woman can be reduced, and the burden of the pregnant woman is relieved; and the patch base body is lighter relative to the probe, and the patch base body can not fall off or slide off after being attached to the body of a pregnant woman, so that the movement of the pregnant woman is not limited, and the monitoring experience is greatly improved.

2. According to the monitoring probe, the electrode patch is integrated in the probe body, so that the use of a lead wire is saved, the cost is reduced, and the monitoring probe is convenient to use.

3. According to the monitoring probe provided by the invention, the lead wire extends out of the probe body and points to the wire outlet mode of the electrode patch pasting and placing position, so that a user can quickly position the lead wire required to be used by any electrode patch pasting and placing position, and the working efficiency of the user is improved.

4. According to the monitoring probe provided by the invention, the detection area range of the electrode patch on the body of the object to be detected can be enlarged in a manner that the two groups of lead wires are respectively arranged at the two opposite ends of the probe body, so that the applicability is stronger.

5. According to the monitoring probe provided by the invention, the mode that at least two lead wires are connected in a bundling manner and then connected to the probe body is adopted, so that the electrode patches can be conveniently and independently placed at different positions, and the flexibility is better; compared with the mode that a plurality of lead wires are respectively and independently connected with the probe body in the prior art, the length of the lead wires can be reduced, and therefore cost is saved.

6. According to the method for detecting the fetal heart rate and the uterine contraction pressure, the electrocardio sensing device and the stress sensing device are integrated in a probe structure, and the mixed electrocardio signal of the abdomen and the uterine muscle contraction pressure signal are collected and analyzed in real time through the electrocardio electrode and the stress sensor respectively, so that the accurate maternal heart rate, fetal heart rate and uterine contraction value can be obtained, the fetal heart and uterine contraction monitoring is completed, and the problems that the probe is heavy, inconvenient to move, easy to detect the maternal heart rate and the uterine contraction monitoring are easily influenced by maternal respiration in the traditional monitoring mode are solved.

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 embodiments or the prior art descriptions 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 schematic structural diagram of a first implementation manner of a mother-child monitoring device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of a mother-child monitoring device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a third embodiment of a mother-child monitoring device according to an embodiment of the present invention;

fig. 4 is a flowchart of an implementation of a method for detecting a fetal heart rate and a uterine contraction pressure according to a second embodiment of the present invention;

FIG. 5 is a flowchart of a method for processing a maternal heart rate and a fetal heart rate according to a second embodiment of the present invention;

FIG. 6 is a flow chart of a graph of uterine contraction pressure provided by a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a monitoring probe in a maternal and fetal monitoring device according to a third embodiment of the present invention;

fig. 8 is a schematic structural diagram of a maternal monitoring device according to a third embodiment of the present invention.

Description of reference numerals: 1. a probe body; 2. an electrocardiogram sensing device; 3. a stress sensing device; 4. conducting wires; 5. a fetal monitoring device.

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 only some embodiments, 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.

Example one

The monitoring probe shown in fig. 1 comprises a probe body 1 and an electrocardio sensing device 2. The probe body 1 comprises a probe shell and a stress sensing device 3 arranged in the probe shell, and the stress sensing device 3 can be specifically a stress meter. When the probe shell is fixed on the abdomen of the tested object, the stress sensing device 3 can be clung to the surface of the abdomen skin of the tested object for sensing the abdomen pressure signal of the tested object, and then the uterine contraction pressure signal of the tested object can be obtained according to the abdomen pressure signal. The electrocardio sensing device 2 comprises a patch substrate and a sensing electrode arranged on the front surface of the patch substrate, the patch substrate can be pasted on the skin of an object to be detected, and the sensing electrode is used for detecting electrocardiosignals of the object to be detected and is connected to the shell of the probe through a lead wire 4.

According to the monitoring probe, the electrocardio sensing device 2 is integrally connected to the probe body 1 through the lead wire 4, so that the number of probes required to be worn in the monitoring process of a pregnant woman can be reduced, and the burden of the pregnant woman is relieved; and the patch base body is lighter than the shell of a common probe, and when the patch base body is used for monitoring a pregnant woman, the patch base body is not easy to drop or loosen after being attached to the abdomen of the pregnant woman, so that the pregnant woman does not have limitation in moving, and the monitoring experience of the pregnant woman is greatly improved.

In this embodiment, the electrocardiograph sensing device 2 includes two electrode patches that are not overlapped with the stress sensing device 3, and each electrode patch includes a patch substrate and a sensing electrode. When the detection object of the electrocardiogram sensing device 2 is a pregnant woman, the electrocardiogram signals detected by the sensing electrodes at least comprise maternal electrocardiogram signals and fetal electrocardiogram signals, and the two electrocardiogram electrodes are adopted to facilitate subsequent analysis according to the detected multichannel electrocardiogram signals, so that monitoring of the maternal heart rate, the fetal heart rate and the uterine contraction pressure is realized. In some embodiments, the number of electrode patches may also be three or more. In other embodiments, the patch substrate may be one, multiple sensing electrodes may be mounted at different positions on the same patch substrate, and the relative positions of the multiple sensing electrodes may be predetermined or may be adjusted within a predetermined range.

In one embodiment of the present embodiment, both electrode patches are integrally connected to the inside of the probe housing and do not overlap with the position of the stress sensing means 3. The electrode patch is positioned in the probe shell, so that the use length of the lead wire 4 can be saved, and the production cost of the monitoring probe is reduced; moreover, when the monitoring probe is used, the probe shell only needs to be fixed on the abdomen of a pregnant woman, and the electrode patch does not need to be additionally adhered to the corresponding position of the abdomen of the pregnant woman, so that the monitoring probe is convenient to use. Preferably, the two electrode patches are arranged in the probe shell as far away from each other as possible, so that the voltage difference between different sensing electrodes can be increased, and the electrocardiosignals with larger amplitude can be conveniently acquired.

In another embodiment of this embodiment, both electrode patches are integrally connected to the outside of the probe housing, and the sensing electrodes of the electrode patches are respectively connected to the probe housing through lead wires 4. The electrode patch is positioned outside the probe shell, so that the detection area range of the electrode patch on the body of the object to be detected can be enlarged, and the applicability is stronger. Likewise, the two electrocardio-electrodes outside the probe housing are also arranged as far apart from each other as possible.

In one embodiment of the present embodiment, two lead wires 4 respectively extend from the probe housing and point to the direction of the placement position of the corresponding electrode patch on the abdomen of the subject to be detected. The electrode patches are connected to the probe shell through the lead wires 4 with fixed pointing directions, and the pointing directions of the lead wires 4 are set according to the preset requirements and all refer to regions with the highest signal acquisition quality of a mother body, so that a user can conveniently and quickly position any one electrode patch to be attached to the region with the highest signal acquisition quality when the electrode patch is used, the time spent on continuously replacing the electrode patches of the electrocardio to acquire better electrocardio signals is greatly reduced, and the working efficiency of the user is improved. In other embodiments, the lead wire 4 may also be a soft, flexible lead wire 4, such lead wire 4 not having a predetermined direction of wire exit.

In one embodiment of the present embodiment, the lead wires 4 of the two electrode patches are bundled and connected outside the probe housing, and then connected to the probe body 1. The electrode patch connected in the mode has better flexibility when acquiring electrocardiosignals, the relative positions of the probe shell and the electrode patch are not fixed, the stress sensing device 3 and the electrode patch can be arranged at the optimal positions required by each other, and when the maternal body position or the fetal body position of a pregnant object to be detected are different, the maternal body position or the fetal body position of the pregnant object to be detected can be independently adjusted in the arrangement positions, so that the optimal signals can be acquired, and the accuracy of signal data acquisition is ensured. And compared with the mode that a plurality of lead wires 4 are respectively and independently connected with the probe body 1, the length of the lead wires 4 can be reduced, thereby saving the cost.

In the embodiment, the patch base body adopts a flexible substrate, and the front surface of the flexible substrate, which is connected with the abdominal skin of the tested object, is provided with an adhesive. When the electrode patch is used, the flexible substrate is attached to the skin of an object to be detected through the adhesive, the flexible substrate is in good contact with the skin and is not easily affected by the self movement of a pregnant woman, and the sensing electrode on the flexible substrate can be stably attached to a required attaching position, so that the influence of looseness or position change of the sensing electrode on the acquisition of electrocardiosignal data is reduced, and the accuracy of the acquisition of the electrocardiosignal data can be improved.

Example two

As shown in fig. 4, a method for detecting a fetal heart rate and a uterine contraction pressure, which uses the monitoring probe according to the first embodiment, specifically includes the following steps:

and step S10, acquiring mechanical uterine muscle contraction pressure signals through a stress sensing device attached to the skin surface of the tested object, and acquiring abdominal mixed electrocardiosignals of the tested object through an electrocardio sensing device attached to the abdomen of the tested object.

In this embodiment, after the maternal and fetal monitoring device is started, the signal data acquisition program in the maternal and fetal monitoring device acquires the mixed abdominal electrocardiosignals and the uterine muscle contraction pressure signals of the object to be measured in real time through the electrocardio-sensing device 2 and the stress-sensing device 3 described in the above embodiment, converts the signals into digital signal data, and stores the digital signal data in the corresponding buffer area. Specifically, the abdomen mixed electrocardiosignals and the uterine muscle contraction pressure signals are acquired in an in-vitro monitoring mode, the monitoring probe is bound or pressed on the abdomen of a parent of the detected object to acquire mechanical pressure signals of uterine contraction activity, and the electrocardio sensing device 2 acquires the abdomen mixed electrocardiosignals including the parent electrocardiosignals, the fetal electrocardiosignals and the uterine muscle signals by adopting a plurality of electrode patches attached to the abdomen of the parent of the detected object.

And step S20, separating and calculating according to the obtained abdomen mixed electrocardiosignals to obtain the maternal heart rate and the fetal heart rate.

And step S30, obtaining a mechanical uterine pressure value according to the acquired uterine muscle contraction pressure signal.

In this embodiment, after the stress sensing device acquires data of the uterine muscle contraction pressure signal, the pressure calculation program performs envelope processing on the acquired uterine muscle contraction pressure signal to obtain a mechanical uterine pressure value by using a preset algorithm.

And S40, outputting the calculation results of the maternal heart rate and the fetal heart rate, and outputting a monitoring curve of the uterine contraction pressure according to the mechanical uterine pressure value.

Specifically, the calculation results of the maternal heart rate and the fetal heart rate are displayed on a display device, and a monitoring curve of the uterine contraction pressure is drawn according to the obtained mechanical uterine pressure value.

According to the method for detecting the fetal heart rate and the uterine contraction pressure, provided by the embodiment of the invention, the electrocardio sensing device 2 and the stress sensing device 3 are integrated in a probe structure, and the mixed electrocardio signal of the abdomen and the uterine muscle contraction pressure signal are respectively collected and analyzed in real time through the electrocardio electrode and the stress sensing device 3, so that the accurate maternal heart rate, fetal heart rate and uterine contraction value can be obtained, the fetal heart and uterine contraction monitoring is completed, and the problems that the probe is heavy and inconvenient to move, the maternal heart rate is easy to detect, and the uterine contraction monitoring is easy to be influenced by maternal respiration in the traditional monitoring mode are solved.

Referring to fig. 5, in step S20, one embodiment of separately calculating the maternal heart rate and the fetal heart rate according to the acquired abdomen mixed electrocardiographic signal includes:

step S201, filtering the abdomen mixed electrocardiosignal to obtain a fetus electrocardiosignal after interference elimination.

Specifically, a preset adaptive filter is adopted to eliminate baseline drift interference, power frequency interference, myoelectric interference and maternal electrocardio interference, so as to obtain a clean fetal electrocardiosignal. In other embodiments, a blind source separation method may be used, and various desired electrical signals including fetal electrocardiosignals may be separated through a series of mathematical derivations by using the statistical independence characteristics of various electrical signals.

And S202, carrying out signal envelope processing on the fetal electrocardiosignals to obtain fetal electrocardio envelope signals.

Specifically, before carrying out signal envelope processing on the fetal electrocardiosignals after the interference is removed, the uterine muscle electrical signals after the interference is removed are rectified through a differential filter, and then the rectified signals pass through a low-pass filter to obtain the fetal electrocardio envelope signals.

And S203, identifying a fetal QRS wave band signal in the fetal electrocardio envelope signal, and calculating a fetal heart rate according to the fetal QRS wave band signal.

Specifically, the heart rate of the fetus can be calculated by detecting peak values above a preset threshold value in the fetal electrocardio envelope signal, and calculating the heart rate of the fetus according to the time interval between two adjacent peak values by the peak values and corresponding fetal QRS wave band signals.

And S204, subtracting the fetal QRS wave band signal from the abdomen mixed electrocardiosignal to obtain a maternal electrocardiosignal.

And S205, carrying out envelope processing on the maternal electrocardiosignal to obtain a maternal electrocardio envelope signal.

Specifically, the maternal electrocardiograph signal may be filtered sequentially through the difference filter and the low-pass filter in the same manner as in step S202, so as to obtain the maternal electrocardiograph envelope signal.

And S206, identifying a parent QRS wave band signal in the parent electrocardio envelope signal, and calculating a parent heart rate according to the parent QRS wave band signal.

Specifically, the peak values above the preset threshold in the maternal electrocardiac envelope signal may be detected in the same manner as in step S203, and the maternal heart rate may be calculated according to the time interval between two adjacent peak values and the corresponding maternal QRS band signal.

In other embodiments, the maternal heart rate and the fetal heart rate can be calculated respectively by identifying the maternal QRS band signal from the mixed abdominal electrocardiosignals and then subtracting the maternal QRS band signal from the mixed abdominal electrocardiosignals to obtain the fetal electrocardiosignals.

As shown in fig. 6, in step S30, one embodiment of obtaining a mechanical uterine pressure value according to the obtained uterine muscle contraction pressure signal includes:

and S301, carrying out signal envelope processing on the uterine muscle contraction pressure signal to obtain a uterine mechanical pressure envelope signal.

Specifically, a preset low-pass filter can be adopted to process the uterine muscle contraction pressure signal, so that the noise in the uterine muscle contraction mechanical pressure signal can be eliminated, and the denoising effect is achieved.

Step S302, dividing the obtained uterus mechanical pressure envelope signal by an envelope value corresponding to a preset pressure value to obtain a uterus mechanical pressure value.

In some embodiments, in order to obtain a more accurate uterine contraction pressure value, the following steps are further included after step S302:

and S303, performing band-pass filtering processing on the abdomen mixed electrocardiosignal to obtain the uterine muscle electric signal after interference elimination.

Specifically, the interference signal includes maternal electrocardiogram, fetal electrocardiogram, baseline drift, power frequency and other electrical signals. For maternal electrocardio, a plurality of elimination methods are available, the maternal electrocardio can be removed by adopting a matched filtering method, and a preset band-pass filter can be generally adopted to process the obtained abdomen mixed electric signal containing the uterine muscle electric signal to obtain the uterine muscle electric signal without maternal electrocardio interference. For fetal electrocardio, because the electrocardio is weak and is about 1/5-1/10 of maternal electrocardio, the fetal electrocardio can be ignored under the condition of reasonably placing an electrode patch; of course, the fetal ECG signal can also be removed from the mixed electrical signal by using matched filtering. In addition, when the monitoring probe is used for signal acquisition, the monitoring probe is also influenced by power frequency interference, and the obtained mixed abdominal electrocardiosignal can be sent to a front value differential amplifying circuit and a 50HZ double-T trap circuit to inhibit common-mode signals such as power frequency interference and the like. There are many methods for eliminating interference signals, and blind source separation can be used, and various required electrical signals including uterine muscle electrical signals can be separated by a series of mathematical deductions by using the statistical independence characteristics of various electrical signals.

And S304, carrying out signal envelope processing on the uterine muscle electrical signal after the interference is eliminated to obtain a uterine muscle electrical pressure envelope signal.

Specifically, before signal envelope processing is performed on the uterine muscle electrical signal after the interference is removed, the uterine muscle electrical signal after the interference is removed needs to be rectified.

And S305, dividing the uterine muscle electrical pressure envelope signal by an envelope value corresponding to a preset pressure value to obtain a uterine pressure value.

And S306, drawing a monitoring curve of the uterine contraction pressure according to the obtained uterine mechanical pressure value and the obtained uterine voltage value. Specifically comprises the following steps of; when the uterine pressure value is smaller than the mechanical uterine pressure value, drawing a monitoring curve of uterine contraction pressure by taking the uterine pressure value as an output result; when the uterine pressure value is larger than or equal to the uterine mechanical pressure value and the absolute value of the difference value between the uterine mechanical pressure value and the uterine pressure value is within a preset range, drawing a monitoring curve of uterine contraction pressure by taking the uterine mechanical pressure value or the uterine pressure value as an output result; and when the uterus voltage value is larger than the uterus mechanical pressure value and the absolute value of the difference value between the uterus mechanical pressure value and the uterus mechanical pressure value exceeds a preset range, respectively drawing a uterus mechanical pressure curve according to the uterus mechanical pressure value and drawing a uterus voltage curve according to the uterus voltage value.

For each time point, the resulting uterine electrical pressure value and uterine mechanical pressure value are compared. When the uterine electrical pressure value is smaller than the uterine mechanical pressure value, the uterine mechanical pressure value is interfered by maternal movement and the like to generate an error pressure detection result, and the uterine electrical pressure value is used as an output result to draw a monitoring curve of uterine contraction pressure. When the mechanical uterine pressure value is larger than or equal to the mechanical uterine pressure value and the absolute value of the difference value between the mechanical uterine pressure value and the mechanical uterine pressure value is within the preset range, the mechanical uterine pressure value at the moment is completely converted from the mechanical uterine pressure value, the mechanical uterine pressure value and the electrical uterine pressure value are both responses of the real activity state of the uterus, and the mechanical uterine pressure value or the electrical uterine pressure value can be used as an output result to draw a monitoring curve of the uterine contraction pressure. When the uterus electrical pressure value is greater than the uterus mechanical pressure value and the absolute value of the difference between the uterus mechanical pressure value and the uterus mechanical pressure value exceeds the preset range, the uterus muscle electrical activity cannot be effectively converted into the uterus muscle mechanical contraction activity due to the fact that the uterus muscle cell fatigue is excessive, a uterus mechanical pressure curve is drawn according to the uterus mechanical pressure value at the moment, a uterus voltage curve is drawn according to the uterus voltage value, and the monitoring curve of the uterus contraction pressure comprises a uterus mechanical pressure curve part and a uterus voltage curve part.

For the convenience of identification, the uterus electric pressure curve part and the uterus mechanical pressure curve are distinguished by curves in different linear types, for example, curves in different colors or thicknesses are adopted, and the contents of the curves displayed by the drawing method are clear, so that the curves are easy to understand by a user. In order to further facilitate understanding of a user, a uterus electric pressure value curve drawn according to the uterus electric pressure value and a uterus mechanical pressure value curve drawn according to the uterus mechanical pressure value are respectively marked in characters on the display area.

EXAMPLE III

As shown in fig. 7, an embodiment of the present invention further provides a maternal-fetal monitoring device, which includes a monitoring probe and a fetal monitoring device connected by wired electrical connection or wireless communication. The monitoring probe adopts the monitoring probe in the first embodiment, and comprises: the physiological signal data acquisition unit 10 is used for acquiring abdominal mixed electrocardio signal data and uterine muscle contraction pressure signal data of a detected parent in real time; the abdomen mixed electrocardiosignal analysis unit 20 is used for obtaining calculation results of the maternal heart rate and the fetal heart rate through separation calculation according to the obtained abdomen mixed electrocardiosignals; and the uterine muscle contraction pressure signal analysis unit 30 is used for obtaining uterine muscle electrical signal data from the obtained abdomen mixed electrocardio signal and comparing the uterine muscle electrical signal data with the obtained uterine muscle contraction pressure signal data to obtain a uterine contraction pressure value. The fetal monitoring device comprises: and the monitoring result output unit 40 is used for displaying the obtained monitoring curves of the maternal heart rate, the fetal heart rate and the uterine contraction pressure value.

In the specific operation process, the physiological signal acquisition unit 10 respectively acquires abdominal mixed electrocardiosignal data and uterine muscle contraction pressure signal data of a detected mother body in real time through the electrocardio sensing device 2 and the stress sensing device 3 and stores the data into corresponding buffer areas, the abdominal mixed electrocardiosignal analysis unit 20 carries out analysis and calculation according to the acquired abdominal mixed electrocardiosignal data in real time to obtain calculation results of the mother heart rate and the fetal heart rate, the uterine muscle contraction pressure signal analysis unit 30 carries out analysis and calculation according to the acquired uterine muscle contraction pressure signal data in real time and combines the analysis and comparison results of the uterine muscle electric signal data obtained from the abdominal mixed electrocardiosignals to obtain a uterine contraction pressure value, and finally the monitoring result output unit 40 outputs the calculated mother body heart rate, fetal heart rate and uterine contraction pressure values to a monitoring system program interface, and the functions of monitoring curve display, printing, storage and the like are completed.

According to the maternal and fetal monitoring equipment provided by the embodiment of the invention, the electrocardio sensing device 2 and the stress sensing device 3 are integrated into one probe structure, the electrocardio sensing device 2 adopts a relatively light electrode patch, the electrode patch is not easy to drop or slide after being placed on the abdomen of a maternal body of a detected object, the movement of the body of the detected object is not limited, the maternal heart rate and the fetal heart rate can be monitored simultaneously, and the condition that the existing ultrasonic sensor detects the maternal heart rate is avoided; meanwhile, the uterine pressure value calculated according to the extracted electrical signal of the uterine muscle and the mechanical uterine pressure value calculated according to the signal of the uterine muscle contraction pressure are compared and analyzed, so that a real uterine contraction pressure value can be obtained, and the problem that the detected uterine contraction pressure value is inaccurate due to the influence of factors such as the breathing of a maternal body of a detected object is greatly reduced; therefore, medical staff can correctly make corresponding treatment measures according to the real state of uterine muscle contraction detected by the detected object, and the risk of medical accidents is reduced.

As shown in fig. 8, the maternal and fetal monitoring device provided by the embodiment of the present invention may include, but is not limited to, a computer, a smart phone, an electrocardiograph, a wearable electrocardiograph acquisition device, a monitor, and the like. The maternal and fetal monitoring device comprises a processor 51 and a memory 52. Fig. 8 is merely an example of a maternal monitoring device and is not intended to be limiting and may include more or fewer components than shown, or some components in combination, or different components, e.g., the maternal monitoring device may also include input-output devices, network access devices, buses, etc. The processor 51 and the memory 52 may be connected by a bus or other means, and fig. 8 illustrates the connection by the bus as an example.

The processor 51 may be a Central Processing Unit (CPU). The Processor 51 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.

Memory 52 serves as a non-transitory computer readable storage medium that may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the method of monitoring maternal uterine contraction activity in an embodiment of the present invention. The processor 51 executes various functional applications and data processing of the processor 51 by running the non-transitory software programs, instructions and modules stored in the memory 52, so as to implement the detection method of the fetal heart rate and the uterine contraction pressure in the second embodiment of the method.

The memory 52 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 51, and the like. Further, the memory 52 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 52 may optionally include memory located remotely from the processor 51, and these remote memories may be connected to the processor 51 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The one or more modules are stored in the memory 52, and when executed by the processor 51, perform the second embodiment fetal heart rate and uterine contraction pressure detection method shown in fig. 4-6.

The details of the maternal and fetal monitoring device can be understood with reference to the corresponding related description and effects in the embodiment shown in fig. 7, which are not described herein again.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk Drive (Hard Disk Drive, abbreviated as HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A detection method of fetal heart rate and uterine contraction pressure is based on a monitoring probe, and is characterized in that the monitoring probe comprises:

the probe comprises a probe body, a probe body and a probe core, wherein a stress sensing device is installed in the probe body, and the stress sensing device can be attached to the surface of the skin of a measured object;

the electrocardio sensing device comprises a patch substrate and a sensing electrode arranged on the patch substrate; the patch matrix can be pasted on the skin of an object to be detected, and the sensing electrode is connected to the probe body through a lead wire;

the detection method comprises the following steps:

acquiring a uterine muscle contraction pressure signal through a stress sensing device attached to the skin surface of a tested object, and acquiring an abdominal mixed electrocardiosignal of the tested object through an electrocardio sensing device attached to the abdomen of the tested object;

according to the obtained abdomen mixed electrocardiosignals, performing separation calculation to obtain a maternal heart rate and a fetal heart rate, and outputting calculation results of the maternal heart rate and the fetal heart rate;

obtaining a mechanical uterine pressure value according to the acquired uterine muscle contraction pressure signal;

performing band-pass filtering processing on the mixed electrocardiosignals of the abdomen to obtain uterine muscle electric signals after interference elimination; carrying out signal envelope processing on the uterine muscle electrical signal after interference elimination to obtain a uterine muscle electrical pressure envelope signal; dividing the uterine muscle electrical pressure envelope signal by an envelope value corresponding to a preset pressure value to obtain a uterine pressure value;

drawing a monitoring curve of uterine contraction pressure according to the obtained mechanical uterine pressure value and the obtained electrical uterine pressure value; the method comprises the following steps: comparing the obtained uterine electrical pressure value with the uterine mechanical pressure value; when the uterine pressure value is smaller than the mechanical uterine pressure value, drawing a monitoring curve of uterine contraction pressure by taking the uterine pressure value as an output result; when the uterine pressure value is larger than or equal to the uterine mechanical pressure value and the absolute value of the difference value between the uterine mechanical pressure value and the uterine pressure value is within a preset range, drawing a monitoring curve of uterine contraction pressure by taking the uterine mechanical pressure value or the uterine pressure value as an output result; and when the uterus voltage value is larger than the uterus mechanical pressure value and the absolute value of the difference value between the uterus mechanical pressure value and the uterus mechanical pressure value exceeds a preset range, respectively drawing a uterus mechanical pressure curve according to the uterus mechanical pressure value and drawing a uterus voltage curve according to the uterus voltage value.

2. The method for detecting fetal heart rate and uterine contraction pressure according to claim 1, wherein the step of separately calculating the maternal heart rate and the fetal heart rate according to the obtained abdomen mixed electrocardiosignals comprises:

filtering the mixed electrocardiosignals of the abdomen to obtain fetal electrocardiosignals after interference elimination;

carrying out signal envelope processing on the fetal electrocardiosignals to obtain fetal electrocardio envelope signals;

identifying a fetal QRS wave band signal in the fetal electrocardio envelope signal, and calculating a fetal heart rate according to the fetal QRS wave band signal;

subtracting the fetal QRS wave band signal from the abdomen mixed electrocardiosignal to obtain a maternal electrocardiosignal;

carrying out envelope processing on the maternal electrocardiosignals to obtain maternal electrocardio envelope signals;

and identifying a parent QRS wave band signal in the parent electrocardio envelope signal, and calculating a parent heart rate according to the parent QRS wave band signal.

3. The method for detecting fetal heart rate and uterine contraction pressure according to claim 1, wherein the obtaining of the mechanical uterine pressure value from the obtained uterine muscle contraction pressure signal comprises:

carrying out signal envelope processing on the uterine muscle contraction pressure signal to obtain a uterine mechanical pressure envelope signal;

and dividing the obtained uterus mechanical pressure envelope signal by an envelope value corresponding to a preset pressure value to obtain a uterus mechanical pressure value.

4. The method of claim 1, wherein the ecg device comprises at least two electrode patches that are not overlapped with the stress sensing device, and each electrode patch comprises the patch substrate and the sensing electrode.

5. The method for detecting fetal heart rate and uterine contraction pressure of claim 4, wherein at least two of the electrode patches are integrally connected to the inside of the probe body.

6. The method for detecting fetal heart rate and uterine contraction pressure according to claim 4, wherein at least two of the electrode patches are located outside the probe body and are respectively connected to the probe body through the lead wires.

7. The method for detecting fetal heart rate and uterine contraction pressure as claimed in claim 6, wherein the lead wire extends from the probe body and points in the direction of the electrode patch placement position.

8. The method for detecting fetal heart rate and uterine contraction pressure as claimed in claim 6, wherein the lead wires of at least two of the electrode patches are connected to the probe body after being bundled.

9. A maternal and fetal monitoring device, comprising: a monitoring probe according to any one of claims 1-8, a display device, a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for detecting fetal heart rate and uterine contractility according to any one of claims 1-3 when executing the computer program, and the display device is used for displaying the maternal heart rate, the calculation structure of fetal heart rate and the monitoring curve of uterine contractility.

10. A computer-readable storage medium, characterized in that it stores computer instructions for causing the computer to execute the detection method of fetal heart rate and uterine contraction pressure according to any one of claims 1 to 3.