CN112971752A - Fetal heart rate deceleration type correction method and device and fetal monitoring equipment - Google Patents
Fetal heart rate deceleration type correction method and device and fetal monitoring equipment Download PDFInfo
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Abstract
The invention relates to the technical field of medical instruments, in particular to a fetal heart rate deceleration type correction method, a fetal heart rate deceleration type correction device and fetal monitoring equipment, wherein the method comprises the following steps: acquiring maternal heart rate data and fetal heart rate data; identifying a deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data; carrying out coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data; and correcting the deceleration type of the fetal heart rate according to the overlapped segments. After the deceleration type is identified by using the fetal heart rate data, the deceleration type of the fetal heart rate is corrected by combining the maternal heart rate data and the coincident segment of the fetal heart rate data. This is because, the coincidence of mother's child rhythm of heart can lead to the fact the influence to the discernment of deceleration type, revises through utilizing the coincidence segment to the deceleration type of child rhythm of heart, can avoid the influence of mother's rhythm of heart to the recognition of deceleration type of child rhythm of heart to improve the discernment rate of accuracy of the deceleration type of child rhythm of heart.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a fetal heart rate deceleration type correction method and device and fetal monitoring equipment.
Background
Fetal heart rate not only can reflect the fetal survival condition, can judge fetal reserve capacity and health status moreover, along with the development of electronic technology, the production of fetal monitor lets people can be more accurate acquire fetal heart rate information. The fetal monitor is used for monitoring the fetus to acquire the fetal heart rate change condition, and meanwhile, data which are continuously traced are called fetal heart rate data. The fetal heart rate data is analyzed, and the deceleration type of the fetal heart rate can be identified. Fetal heart rate deceleration refers to a drop in fetal heart rate below a baseline level. In clinic, fetal heart rate deceleration is an important index for judging fetal safety risk and acid-base metabolism conditions, and can be classified according to the relationship between occurrence time and uterine contraction, for example, the deceleration types can be classified into early deceleration (deceleration occurring with uterine contraction synchronously), late deceleration (deceleration occurring with uterine contraction delay), mutation deceleration (deceleration having obvious sudden and no obvious relationship with uterine contraction) and prolonged deceleration (fetal heart rate decrease obviously lower than a baseline, and deceleration lasting for 2-10 min).
In the existing clinic, fetal heart rate data is mostly acquired by means of ultrasonic Doppler, abdominal wall electrocardio and the like. When the fetal heart rate is acquired in an ultrasonic Doppler mode, an ultrasonic probe is placed on the abdomen of a mother body to detect fetal heart signals; however, in addition to fetal heart movement, there are also maternal blood flow movement, fetal limb movement, etc. in the maternal abdomen, which are captured by the ultrasound probe and may interfere with fetal heart signal acquisition. For example, when the position where the ultrasonic probe is placed deviates from the fetal heart, the acquired frequency deviation signal is mainly generated by the blood flow motion of the maternal abdominal aorta, and the heart rate calculated according to the frequency deviation signal is the maternal heart rate, so that the identification accuracy of the fetal heart rate deceleration type is low, and further serious interference can be generated on the clinical judgment of a doctor. When the fetal heart rate is acquired by using an abdominal wall electrocardio mode, the discharge electrodes are attached around the fetal heart, so that the fetal electrocardio signal with larger amplitude can be acquired, and the maternal electrocardio signal amplitude can be inhibited as far as possible because the abdomen is far away from the maternal heart. Specifically, the fetal electrocardiosignals are transmitted to the surface of the mother body through various tissues of amniotic fluid and the mother body and are mixed with the maternal electrocardiosignals, the fetal electrocardiosignals are weak, and the amplitude and the form of the fetal electrocardiosignals are closely related to the gestational period, the body position, the impedance of the surface of the mother body and the like of the fetus. Generally, however, the larger the gestational week is, the larger the body surface fetus electrocardio amplitude is. However, in the late pregnancy, the detected fetal electrocardiosignal amplitude may be larger than the maternal electrocardiosignal amplitude, and at this time, the maternal electrocardiosignal may be identified as the fetal electrocardiosignal, so that the accuracy of the identified fetal heart rate deceleration type is low.
Disclosure of Invention
In view of this, the embodiment of the invention provides a fetal heart rate deceleration type correction method and device and a fetal monitoring device, so as to solve the problem of low fetal heart rate identification accuracy.
According to a first aspect, an embodiment of the present invention provides a method for correcting a fetal heart rate deceleration type, including:
acquiring maternal heart rate data and fetal heart rate data;
identifying a deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data;
carrying out coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data; wherein the coincidence segment is a set of continuous coincidence data in the maternal heart rate data and the fetal heart rate data;
and correcting the deceleration type of the fetal heart rate according to the overlapped segments.
According to the method for correcting the fetal heart rate deceleration type, provided by the embodiment of the invention, after the deceleration type is identified by utilizing the fetal heart rate data, the deceleration type of the fetal heart rate is corrected by combining the maternal heart rate data and the superposed segment of the fetal heart rate data. This is because, the coincidence of mother's child rhythm of heart can lead to the fact the influence to the discernment of deceleration type, revises through utilizing the coincidence segment to the deceleration type of child rhythm of heart, can avoid the influence of mother's rhythm of heart to the recognition of deceleration type of child rhythm of heart to improve the discernment rate of accuracy of the deceleration type of child rhythm of heart.
With reference to the first aspect, in a first implementation manner of the first aspect, the performing coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincided segment of the maternal heart rate data and the fetal heart rate data includes:
acquiring a time window with a first preset length;
sliding the time window on the maternal heart rate data and the fetal heart rate data by preset step length, and determining the difference value between each maternal heart rate data and the corresponding fetal heart rate data in the time window;
marking the fetal heart rate data of which the difference value is within a preset threshold value range as first suspicious coincidence data;
and obtaining the coincident segments according to the first suspicious coincident data.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the obtaining the coincident segments according to the first suspicious coincident data includes:
counting the number of the first suspicious coincidence data in each time window;
determining a time window when the number of the first suspicious coincidence data meets a preset condition as a suspicious time window, and marking all fetal heart rate data in the suspicious time window as second suspicious coincidence data;
searching the fetal heart rate data for indicia of the second suspect coincidence data to determine the coincident segments.
With reference to the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, in a third embodiment of the first aspect, the correcting the deceleration type of the fetal heart rate according to the coincidental segment includes:
counting the number of the overlapped segments;
when the number of the overlapped segments is larger than 0 and the deceleration number of the fetal heart rate is larger than 0, setting time windows with second preset lengths at the starting position of each deceleration and the ending position of each deceleration;
judging whether the length of the overlapped segment in the time window with the second preset length is greater than the preset length or not;
and when the length of the superposed segment in the time window with the second preset length is greater than the preset length, correcting the deceleration type of the fetal heart rate corresponding to the time window with the second preset length.
With reference to the third implementation manner of the first aspect, in the fourth implementation manner of the first aspect, after the step of correcting the deceleration type of the fetal heart rate corresponding to the time window of the second preset length, the method further includes:
and marking the deceleration corresponding to the deceleration type of the corrected fetal heart rate.
According to the method for correcting the deceleration type of the fetal heart rate, provided by the embodiment of the invention, the deceleration corresponding to the deceleration type of the fetal heart rate is marked to indicate that the deceleration is corrected, and the subsequent deceleration is not required to be processed again, so that the repeated processing of data can be avoided, and the efficiency of recognizing the deceleration type of the fetal heart rate is improved.
With reference to the third embodiment of the first aspect, in the fifth embodiment of the first aspect, the correcting the deceleration type of the fetal heart rate according to the overlapped sections further includes:
when the number of the overlapped segments is larger than 0 and the deceleration number of the fetal heart rate is larger than 0, sending the corrected deceleration type to a preset position;
and when the number of the overlapped segments is equal to 0 or the deceleration number of the fetal heart rate is equal to 0, directly sending the identified deceleration type to the preset position.
According to the method for correcting the fetal heart rate deceleration type, the corrected deceleration type is stored after the deceleration needing to be corrected is corrected, or the deceleration type which does not need to be corrected is directly stored, so that the accuracy of the stored deceleration type can be ensured, and only the deceleration type needs to be extracted from a preset position when the deceleration type needs to be used subsequently, and the repeated calculation is not needed.
With reference to the first aspect, in a sixth implementation manner of the first aspect, the identifying a deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data includes:
calculating a fetal heart rate data baseline and a uterine contraction data baseline based on the maternal heart rate data and the fetal heart rate data;
detecting deceleration of the fetal heart rate and marking a starting position and an ending position of the deceleration by using the fetal heart rate data baseline and the fetal heart rate data;
detecting the initial position, the end position and the position of the highest peak point of the maternal uterine contraction by using the maternal heart rate data and the uterine contraction data baseline;
identifying a deceleration type of the fetal heart rate based on a correspondence between a position of deceleration of the fetal heart rate and a position where the uterine contraction occurs and a duration of deceleration of the fetal heart rate.
According to a second aspect, embodiments of the present invention further provide a fetal heart rate deceleration type correction device, including:
the acquisition device is used for acquiring maternal heart rate data and fetal heart rate data;
the deceleration type identification device is used for identifying the deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data;
the coincidence detection device is used for performing coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data;
and the deceleration type correction device is used for correcting the deceleration type of the fetal heart rate according to the overlapped segment.
According to the fetal heart rate deceleration type correcting device provided by the embodiment of the invention, after the deceleration type is identified by utilizing the fetal heart rate data, the deceleration type of the fetal heart rate is corrected by combining the maternal heart rate data and the superposed segment of the fetal heart rate data. This is because, the coincidence of mother's child rhythm of heart can lead to the fact the influence to the discernment of deceleration type, revises through utilizing the coincidence segment to the deceleration type of child rhythm of heart, can avoid the influence of mother's rhythm of heart to the recognition of deceleration type of child rhythm of heart to improve the discernment rate of accuracy of the deceleration type of child rhythm of heart.
According to a third aspect, embodiments of the present invention further provide a fetal monitoring device, including:
a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing therein computer instructions, and the processor executing the computer instructions to perform the method for correcting a fetal heart rate deceleration type according to the first aspect of the present invention or according to any of the embodiments of the first aspect.
According to a fourth aspect, the present invention further provides a computer-readable storage medium storing computer instructions for causing a computer to perform the method for correcting a fetal heart rate deceleration type according to the first aspect of the present invention or any one of the embodiments of the first aspect.
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 flow chart of a method of correcting a fetal heart rate deceleration type according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of correcting a fetal heart rate deceleration type according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of correcting a fetal heart rate deceleration type according to an embodiment of the present invention;
FIG. 4a is a graph illustrating the recognition of a type of fetal heart rate deceleration in the prior art;
FIG. 4b is a schematic illustration of the results of a fetal heart rate deceleration type modification in an embodiment in accordance with the invention;
fig. 5 is a block diagram of a fetal heart rate deceleration type correction apparatus according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of a fetal monitoring device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
It should be noted that, in the embodiment of the present invention, the maternal heart rate data and the fetal heart rate data are data of a maternal heart rate and a fetal heart rate detected at the same time; i.e. at the same time point, the maternal heart rate as well as the fetal heart rate are acquired. Maternal heart rate data and fetal heart rate data may also be understood as a set of maternal heart rates and fetal heart rates (i.e. a set of multiple heart rate data points) acquired at various points in time.
The maternal heart rate data and the fetal heart rate data can be represented in a curve form, an array form or other forms. For example, when representing maternal heart rate data as well as fetal heart rate data in the form of a curve, the heart rate amplitude of each data point on the curve at the corresponding time point, while the time interval between adjacent time points depends on the time interval at which the heart rate is sampled; when representing maternal heart rate data as well as fetal heart rate data in the form of an array, each element in the array is a heart rate amplitude at the corresponding point in time. The representation form of the data is not limited at all, and the fetal monitoring equipment is ensured to be capable of acquiring maternal heart rate data and fetal heart rate data.
Because in the actual clinical process, be subject to multiple factor, easily the mistake detects the maternal heart rate as the foetus heart rate, and usually the maternal heart rate is less than the foetus heart rate, when false detection the maternal heart rate as the foetus heart rate and last for a certain time, can be because the characteristics that the maternal heart rate is less than the foetus heart rate, detect the appearance of foetus heart rate deceleration. However, the deceleration of the fetal heart rate at this time is not the true deceleration of the fetal heart rate, may be a true deceleration, and may also be a false deceleration caused by the superposition of the fetal heart rates.
Based on this, the fetal heart rate deceleration type correction method provided by the embodiment of the invention performs coincidence detection of the maternal heart rate data and the fetal heart rate data by taking the maternal heart rate as auxiliary analysis information for fetal signaling deceleration type correction to obtain a coincidence segment; and then, the identified fetal heart rate deceleration type is corrected based on the coincident segments so as to improve the accuracy of the fetal heart rate deceleration type.
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for fetal heart rate deceleration type modification, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.
In this embodiment, a method for correcting a fetal heart rate deceleration type is provided, which can be used in a fetal monitoring device, such as a monitor, and fig. 1 is a flowchart of a method for correcting a fetal heart rate deceleration type according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:
and S11, acquiring maternal heart rate data and fetal heart rate data.
The maternal heart rate data and the fetal heart rate data can be acquired by a monitor in real time, and can also be stored in fetal monitoring equipment or acquired from the outside.
For example, the fetal monitoring data acquisition program can respectively acquire the maternal heart rate and the fetal monitoring data in real time after the monitoring device is started, the acquired data are put into a designated buffer area, and the fetal monitoring system program acquires the data from the buffer area to complete the analysis of the signal data, the heart rate calculation and the like.
The acquisition mode of maternal heart rate data and fetal heart rate data is not limited at all, and the fetal monitoring equipment is only required to be ensured to be capable of acquiring.
And S12, identifying the deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data.
Wherein, the identification of the deceleration type of the fetal heart rate also needs to be combined with the uterine contraction reflected by the maternal heart rate data.
If the detected deceleration occurs in synchronization with uterine contractions, the deceleration is considered early deceleration; if the detected deceleration occurs later than the contractions, the deceleration is considered to be late deceleration; if the detected deceleration has no obvious relative relation with the uterine contractions, the deceleration is considered as variant deceleration; if the detected deceleration duration is 2-10min, the deceleration is considered to be an extended deceleration.
This step will be described in detail below.
And S13, carrying out coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data.
The coincidence segment is a set of continuous coincidence data in maternal heart rate data and fetal heart rate data.
When the fetal monitoring equipment performs coincidence detection, the difference value of the maternal heart rate and the fetal heart rate data of each time point can be compared, and if the difference value meets a certain threshold condition, the maternal heart rate and the fetal heart rate of the time point are considered to coincide; of course, the coincidence detection may be performed in other ways, and this step will be described in detail below.
The fetal heart rate data is represented in a curve form, the superposition segment is a continuous superposition part between the fetal heart rate data curve and the maternal heart rate curve, and the continuous superposition part comprises a plurality of superposed data points between the maternal heart rate data curve and the fetal heart rate data curve.
And S14, correcting the deceleration type of the fetal heart rate according to the overlapped segments.
After the fetal monitoring device identifies the fetal heart rate deceleration type in S12, the fetal monitoring device detects the coincidence of the maternal heart rate data and the fetal heart rate data, and if a coincidence segment is detected, it indicates that there is a coincidence between the maternal heart rate data and the fetal heart rate data, and since the maternal heart rate data may affect the identification of the fetal heart rate deceleration type, the deceleration type near the coincidence segment needs to be corrected, so as to indicate that the deceleration type needs to be corrected due to the lack of sufficient fetal heart rate data. The details will be described later.
According to the method for correcting the fetal heart rate deceleration type, after the deceleration type is identified by utilizing the fetal heart rate data, the deceleration type of the fetal heart rate is corrected by combining the maternal heart rate data and the superposition segment of the fetal heart rate data. This is because, the coincidence of mother's child rhythm of heart can lead to the fact the influence to the discernment of deceleration type, revises through utilizing the coincidence segment to the deceleration type of child rhythm of heart, can avoid the influence of mother's rhythm of heart to the recognition of deceleration type of child rhythm of heart to improve the discernment rate of accuracy of the deceleration type of child rhythm of heart.
In this embodiment, a fetal heart rate deceleration type correction method is provided, which can be used in a fetal monitoring device, such as a monitor, and fig. 2 is a flowchart of a fetal heart rate deceleration type correction method according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:
and S21, acquiring maternal heart rate data and fetal heart rate data.
Please refer to S11 in fig. 1, which is not described herein again.
And S22, identifying the deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data.
The fetal monitoring device may preprocess the fetal heart rate data before using the fetal heart rate data to identify the type of deceleration of the fetal heart rate. For example, the maternal heart rate data and the fetal heart rate data are subjected to a preset adaptive filter to eliminate interference data and invalid data, so that clean fetal heart rate data, uterine contraction data and fetal movement data are obtained. Referring to fig. 4a and 4b, each of the graphs comprises 3 graphs from top to bottom, wherein the 3 graphs are a Fetal Heart Rate (FHR) data curve and a Maternal Heart Rate (MHR) data curve, a prenatal uterine function (UA) data curve and an Automatic Fetal Movement (AFM) data curve. Specifically, the above S22 includes the following steps:
and S221, calculating a fetal heart rate data baseline and a uterine contraction data baseline based on the maternal heart rate data and the fetal heart rate data.
After obtaining clean fetal heart rate data, contraction data and fetal movement data, the fetal monitoring device can calculate a fetal heart rate data baseline and a contraction data baseline. Wherein the fetal heart rate data baseline refers to the fetal heart rate recorded without fetal movement and without uterine contraction effects.
S222, detecting deceleration of the fetal heart rate and marking the initial position and the end position of the deceleration by using the baseline of the fetal heart rate data and the fetal heart rate data.
When the fetal monitoring device detects that the fetal heart rate data is below the baseline of the fetal heart rate data and meets the corresponding preset threshold condition, the fetal monitoring device can deem that a deceleration is detected and mark the starting position and the ending position of the deceleration.
And S223, detecting the initial position, the end position and the position of the highest peak point of the maternal uterine contraction by using the maternal heart rate data and the uterine contraction data baseline.
The fetal monitoring equipment detects the maternal uterine contraction data and calculates the initial ending time and the position of the highest peak point of the maternal uterine contraction.
S224, identifying the deceleration type of the fetal heart rate based on the corresponding relation between the deceleration position of the fetal heart rate and the position where the uterine contraction occurs and the deceleration duration of the fetal heart rate.
The fetal monitoring equipment judges and marks the fetal heart rate deceleration type obtained by detection according to the position corresponding relation of the deceleration occurring in the uterine contraction and the duration of the deceleration. The specific method for judging and marking is as follows: if the detected deceleration occurs in synchronization with uterine contractions, the deceleration is considered early deceleration; if the detected deceleration occurs later than the contractions, the deceleration is considered to be late deceleration; if the detected deceleration has no obvious relative relation with the uterine contractions, the deceleration is considered as variant deceleration; if the detected deceleration duration is 2-10min, the deceleration is considered to be an extended deceleration.
Fig. 4a shows the detection result of fetal heart rate data without incorporating the maternal heart rate as auxiliary correction reference information, and it can be seen that where the coincidence of the maternal heart rates occurs, a variant deceleration and a late deceleration are detected.
And S23, carrying out coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data.
The coincidence segment is a set of continuous coincidence data in maternal heart rate data and fetal heart rate data.
Specifically, the above S23 includes the following steps:
s231, acquiring a time window with a first preset length.
The fetal monitoring device may set a time window of a first preset length based on actual demand to analyze valid fetal heart rate data and maternal heart rate data within the time window.
S232, sliding a time window on the maternal heart rate data and the fetal heart rate data in preset step length, and determining the difference value between each maternal heart rate data and the corresponding fetal heart rate data in the time window.
Taking the maternal heart rate data and the fetal heart rate data in a curve form as an example, as shown in fig. 4a, a time axis is taken as a coordinate axis of a maternal heart rate data curve and a fetal heart rate data curve, and the maternal heart rate and the fetal heart rate are respectively collected at the same time point to form a curve shown in fig. 4 a.
The time windows of the first preset length obtained in S231 are slid in preset steps on fig. 4a, and the difference between each maternal heart rate data and the fetal heart rate data is calculated in each time window, for example, as shown in fig. 4a, the difference between the maternal heart rate and the fetal heart rate corresponding to the time points 14:44:57 is calculated.
Since each time window may include a plurality of time point corresponding heart rate data, a maternal heart rate to fetal heart rate difference value needs to be calculated for each time point corresponding heart rate data. Alternatively, it is also understood that each time window includes a plurality of data points of the maternal heart rate and a same number of data points of the fetal heart rate, and the difference between two data points is calculated at the same time point, i.e. the difference between each maternal heart rate data and the corresponding fetal heart rate data is obtained.
And S233, marking the fetal heart rate data with the difference value within the preset threshold range as first suspicious coincidence data.
The fetal monitoring device marks the fetal heart rate data of which the calculated difference value is within the preset threshold range in the step S232 as first suspicious coincidence data. Within the same time window, there may be a plurality of first suspected coincidence data, which may be continuous, discontinuous, or the like; of course, the first suspect coincidence data may not exist within the same time window.
The preset threshold range may be specifically set according to actual conditions, for example, set by medical staff according to actual experience, and the like.
And S234, obtaining a coincidence segment according to the first suspicious coincidence data.
And after the fetal monitoring equipment obtains the first suspicious coincidence data, processing the first suspicious coincidence data to obtain a coincidence fragment.
Wherein, the coincident segments can be obtained by adopting the following modes:
(1) and counting the number of the first suspicious coincidence data in each time window.
After the fetal monitoring device marks the first suspected coincidence data in each time window in S233, the fetal monitoring device may count the number of the first suspected coincidence data in each time window.
(2) And determining a time window when the quantity of the first suspicious coincidence data meets a preset condition as a suspicious time window, and marking all fetal heart rate data in the suspicious time window as second suspicious coincidence data.
The preset condition may be a preset number of the first suspected coincidence data, or a preset ratio of the suspected coincidence data to all fetal heart rate data points in the time window. For example, a time window in which the ratio of the first suspected coincidence data to all fetal heart rate data points in the time window is greater than a preset ratio may be determined as a suspected time window, and it may be considered that coincidence of the maternal heart rate and the fetal heart rate occurs in the time window.
After determining the suspected time window, the fetal monitoring device marks all fetal heart rate data within the time window as second suspected coincidence data.
After the first time window process is completed, the fetal monitoring device then slides the time window backwards in steps S, and repeats the above S231-S234 until the time window slides to the last 1 data point of the fetal heart rate data and the maternal heart rate data.
(3) The fetal heart rate data is searched for indicia of second suspect coincidence data to determine coincident segments.
Specifically, the fetal monitoring device searches for a marker of second suspect coincidence data in the fetal heart rate data, and searches for a marker of second suspect coincidence data starting from a beginning segment of the fetal heart rate data. When the mark of the second suspicious coincidence data is searched, the mark of the second suspicious coincidence data is marked as the starting point of the coincidence segment to record the position information, the position is taken as the starting point to continue searching backwards, the first non-second suspicious coincidence data searched after the point is marked as the end point of the coincidence segment, and the end position of the coincidence segment is recorded. Then, the starting point and the ending point of the next overlapped segment are searched backwards from the ending position until the fetal heart rate data search is completed, so that all the overlapped segments and the corresponding starting and ending positions are obtained.
And S24, correcting the deceleration type of the fetal heart rate according to the overlapped segments.
Please refer to S14 in fig. 1, which is not described herein again.
In this embodiment, a fetal heart rate deceleration type correction method is provided, which can be used in a fetal monitoring device, such as a monitor, and fig. 3 is a flowchart of a fetal heart rate deceleration type correction method according to an embodiment of the present invention, as shown in fig. 3, the flowchart includes the following steps:
and S31, acquiring maternal heart rate data and fetal heart rate data.
Please refer to S21 in fig. 2 for details, which are not described herein.
And S32, identifying the deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data.
Please refer to S22 in fig. 2 for details, which are not described herein.
And S33, carrying out coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data.
The coincidence segment is a set of continuous coincidence data in maternal heart rate data and fetal heart rate data.
Please refer to S23 in fig. 2 for details, which are not described herein.
And S34, correcting the deceleration type of the fetal heart rate according to the overlapped segments.
Specifically, the above S34 includes the following steps:
and S341, counting the number of the overlapped segments.
The fetal monitoring device has derived coincident segments when calculating the coincident portions and has marked the start and end points of each coincident segment in S333. Then, the number of overlapping segments can be counted by using the starting point or the end point of each overlapping segment.
And S342, judging whether the number of the overlapped segments is more than 0 and the deceleration number of the fetal heart rate is more than 0.
After the fetal monitoring device identifies the deceleration type of the fetal heart rate in S32, it can obtain the corresponding deceleration amount in the current fetal heart rate data, and can count the deceleration amount.
When the number of the overlapped segments is greater than 0 and the deceleration number of the fetal heart rate is greater than 0, executing S343; otherwise, S37 is executed.
And S343, setting a time window with a second preset length at the starting position of each deceleration and the ending position of each deceleration.
The length of the time window with the second preset length set by the fetal monitoring device may be specifically set according to actual situations, and is not limited herein.
And S344, judging whether the length of the overlapped segment in the time window with the second preset length is greater than the preset length.
After setting the time window of the second preset length, the time window of the second preset length may include part of, or all of the overlapping segments described above, or may not include the overlapping segments described above.
The fetal monitoring device may determine whether the time window of the second preset length includes the coincidence segment by using the identifier of the start point or the end point of the coincidence segment. Regarding the length of the included coincidental segment, a search of data points in the coincidental segment can be made within a time window of the second preset length to determine the length.
When the length of the overlapped segment in the time window with the second preset length is greater than the preset length, the deceleration type corresponding to the time window with the second preset length is considered to need to be corrected, that is, S345 is executed; otherwise, S37 is executed.
And S345, correcting the deceleration type of the fetal heart rate corresponding to the time window with the second preset length.
When it is determined in S344 that correction is required for a certain deceleration type, a correction flag may be added to the deceleration; the deceleration type identified in S32 is then used, along with the correction flag, to correct for the deceleration type of the fetal heart rate. For example, if the identified deceleration type is an extended deceleration and the deceleration has a correction flag, the identified deceleration type is corrected to a suspected extended deceleration and the correction flag is updated to indicate that the deceleration has been corrected. Similarly, if the identified deceleration type is another type of deceleration and the deceleration has a correction flag, the deceleration type is corrected to the corresponding suspected other type of deceleration and the correction flag is updated.
As shown in fig. 4b, the same maternal heart rate data and the fetal heart rate data in fig. 4a are analyzed by using the method for correcting the fetal heart rate deceleration type according to the embodiment of the present invention, and a suspected variant deceleration and a suspected late deceleration are detected in the portion where the maternal heart rates coincide. The marks are suspicious mutation deceleration and suspicious late deceleration because data segments with coincident mother fetal heart rate are detected in the fetal heart rate deceleration segment; in the data segment with the coincided mother fetal heart rate, because the actual fetal heart rate value is unknown, the original type of the variant deceleration and the late deceleration is corrected into the suspicious variant deceleration and the suspicious late deceleration, which shows that the detected deceleration accords with the judgment condition of the fetal heart rate deceleration, but the deceleration identification result needs to be further confirmed due to lack of enough fetal heart rate information.
And S35, marking the deceleration corresponding to the deceleration type of the corrected fetal heart rate.
After the fetal monitoring device corrects the deceleration type of the deceleration with the correction mark, the fetal monitoring device updates the correction mark to indicate that the deceleration type corresponding to the correction mark is corrected, and then the fetal monitoring device does not need to process again, so that repeated processing of data is avoided.
And S36, sending the corrected deceleration type to a preset position.
And S37, sending the identified deceleration type to a preset position.
The fetus monitoring device outputs the maternal-fetal monitoring analysis result determined after analysis and calculation to the monitoring system program, and the monitoring system program puts the analysis result into a designated buffer area, and acquires data from the buffer area to complete the functions of displaying, printing, storing and the like of the analysis result.
According to the method for correcting the fetal heart rate deceleration type, the deceleration corresponding to the fetal heart rate deceleration type is marked to indicate that the deceleration is corrected, follow-up processing is not needed again, repeated processing of data can be avoided, and the efficiency of recognizing the fetal heart rate deceleration type is improved. Meanwhile, after the deceleration needing to be subjected to deceleration type correction is corrected, the corrected deceleration type is stored, or the deceleration type which does not need to be subjected to deceleration type correction is directly stored, so that the accuracy of the stored deceleration type can be ensured, and when the deceleration type is required to be used subsequently, the deceleration type is extracted from a preset position without repeated calculation.
In this embodiment, a fetal heart rate deceleration type correction device is further provided, and the device is used for implementing the above embodiments and preferred embodiments, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
The present embodiment provides a fetal heart rate deceleration type correction device, as shown in fig. 5, including:
and the obtaining module 41 is configured to obtain maternal heart rate data and fetal heart rate data.
A deceleration type identification module 42, configured to identify a deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data.
A coincidence detection module 43, configured to perform coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data; the coincidence segment is a set of continuous coincidence data in the maternal heart rate data and the fetal heart rate data.
And the deceleration type correction module 44 is used for correcting the deceleration type of the fetal heart rate according to the overlapped segment.
The fetal heart rate deceleration type modification apparatus in this embodiment is in the form of a functional unit, where the unit refers to an ASIC circuit, a processor and memory executing one or more software or fixed programs, and/or other devices that may provide the above-described functionality.
Further functional descriptions of the modules are the same as those of the corresponding embodiments, and are not repeated herein.
The embodiment of the invention also provides fetal monitoring equipment which is provided with the fetal heart rate deceleration type correction device shown in the figure 5.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a fetal monitoring device according to an alternative embodiment of the present invention, as shown in fig. 6, the fetal monitoring device may include: at least one processor 51, such as a CPU (Central Processing Unit), at least one communication interface 53, memory 54, at least one communication bus 52. Wherein a communication bus 52 is used to enable the connection communication between these components. The communication interface 53 may include a Display (Display) and a Keyboard (Keyboard), and the optional communication interface 53 may also include a standard wired interface and a standard wireless interface. The Memory 54 may be a high-speed RAM Memory (volatile Random Access Memory) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The memory 54 may alternatively be at least one memory device located remotely from the processor 51. Wherein the processor 51 may be in connection with the apparatus described in fig. 5, the memory 54 stores an application program, and the processor 51 calls the program code stored in the memory 54 for performing any of the above-mentioned method steps.
The communication bus 52 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The communication bus 52 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.
The memory 54 may include a volatile memory (RAM), such as a random-access memory (RAM); the memory may also include a non-volatile memory (english: non-volatile memory), such as a flash memory (english: flash memory), a hard disk (english: hard disk drive, abbreviated: HDD) or a solid-state drive (english: SSD); the memory 54 may also comprise a combination of the above types of memories.
The processor 51 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.
The processor 51 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.
Optionally, the memory 54 is also used to store program instructions. The processor 51 may invoke program instructions to implement a method of modifying a fetal heart rate deceleration type as shown in the embodiments of fig. 1 to 4 of the present application.
The embodiment of the invention also provides a non-transitory computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the method for correcting the fetal heart rate deceleration type in any method embodiment. 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 (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; 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 (10)
1. A method of correcting a type of fetal heart rate deceleration, comprising:
acquiring maternal heart rate data and fetal heart rate data;
identifying a deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data;
carrying out coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data; wherein the coincidence segment is a set of continuous coincidence data in the maternal heart rate data and the fetal heart rate data;
and correcting the deceleration type of the fetal heart rate according to the overlapped segments.
2. The method according to claim 1, wherein the coincidence detecting the maternal heart rate data and the fetal heart rate data to obtain a coincident segment of the maternal heart rate data and the fetal heart rate data comprises:
acquiring a time window with a first preset length;
sliding the time window on the maternal heart rate data and the fetal heart rate data by preset step length, and determining the difference value between each maternal heart rate data and the corresponding fetal heart rate data in the time window;
marking the fetal heart rate data of which the difference value is within a preset threshold value range as first suspicious coincidence data;
and obtaining the coincident segments according to the first suspicious coincident data.
3. The method of claim 2, wherein said deriving the coincident segments from the first suspect coincidence data comprises:
counting the number of the first suspicious coincidence data in each time window;
determining a time window when the number of the first suspicious coincidence data meets a preset condition as a suspicious time window, and marking all fetal heart rate data in the suspicious time window as second suspicious coincidence data;
searching the fetal heart rate data for indicia of the second suspect coincidence data to determine the coincident segments.
4. A method according to any one of claims 1-3, wherein said modifying the type of deceleration of the fetal heart rate in dependence on the coincident segments comprises:
counting the number of the overlapped segments;
when the number of the overlapped segments is larger than 0 and the deceleration number of the fetal heart rate is larger than 0, setting time windows with second preset lengths at the starting position of each deceleration and the ending position of each deceleration;
judging whether the length of the overlapped segment in the time window with the second preset length is greater than the preset length or not;
and when the length of the superposed segment in the time window with the second preset length is greater than the preset length, correcting the deceleration type of the fetal heart rate corresponding to the time window with the second preset length.
5. The method according to claim 4, wherein the step of correcting the type of deceleration of the fetal heart rate corresponding to the time window of the second preset length further comprises:
and marking the deceleration corresponding to the deceleration type of the corrected fetal heart rate.
6. The method according to claim 4, wherein said modifying the type of deceleration of the fetal heart rate according to the coincident segments further comprises:
when the number of the overlapped segments is larger than 0 and the deceleration number of the fetal heart rate is larger than 0, sending the corrected deceleration type to a preset position;
and when the number of the overlapped segments is equal to 0 or the deceleration number of the fetal heart rate is equal to 0, directly sending the identified deceleration type to the preset position.
7. The method of claim 1, wherein identifying a type of deceleration of a fetal heart rate based on the maternal heart rate data and the fetal heart rate data comprises:
calculating a fetal heart rate data baseline and a uterine contraction data baseline based on the maternal heart rate data and the fetal heart rate data;
detecting deceleration of the fetal heart rate and marking a starting position and an ending position of the deceleration by using the fetal heart rate data baseline and the fetal heart rate data;
detecting the initial position, the end position and the position of the highest peak point of the maternal uterine contraction by using the maternal heart rate data and the uterine contraction data baseline;
identifying a deceleration type of the fetal heart rate based on a correspondence between a position of deceleration of the fetal heart rate and a position where the uterine contraction occurs and a duration of deceleration of the fetal heart rate.
8. A fetal heart rate deceleration type correction device comprising:
the acquisition device is used for acquiring maternal heart rate data and fetal heart rate data;
the deceleration type identification device is used for identifying the deceleration type of the fetal heart rate based on the maternal heart rate data and the fetal heart rate data;
the coincidence detection device is used for performing coincidence detection on the maternal heart rate data and the fetal heart rate data to obtain a coincidence segment of the maternal heart rate data and the fetal heart rate data; wherein the coincidence segment is a set of continuous coincidence data in the maternal heart rate data and the fetal heart rate data;
and the deceleration type correction device is used for correcting the deceleration type of the fetal heart rate according to the overlapped segment.
9. A fetal monitoring device, comprising:
a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform a method of modifying a fetal heart rate deceleration type as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores computer instructions for causing the computer to execute the method of correcting of the type of fetal heart rate deceleration defined in any one of claims 1 to 7.
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| CN201911282445.2A CN112971752B (en) | 2019-12-13 | Fetal heart rate deceleration type correction method and device and fetal monitoring equipment |
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