Virtual reality-based psychological counseling method and system for labor analgesia in pregnant women

Abstract

The present invention relates to the field of virtual reality technology, and in particular to a method and system for psychological counseling for labor analgesia in pregnant women based on virtual reality. The method and system include: analyzing the anxiety and pain sensitivity of pregnant women through physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage; analyzing the stress recovery ability of pregnant women through physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage; evaluating the risk of uncontrolled labor of pregnant women based on the analysis results of the anxiety and pain sensitivity and stress recovery ability of pregnant women; generating an optimized prenatal VR psychological counseling strategy for the prenatal psychological counseling stage of pregnant women based on the assessment results of the uncontrolled labor risk; and realizing precise adaptation and dynamic optimization of the psychological counseling strategy, thereby improving the immersive experience and participation of pregnant women in a virtual environment, alleviating their prenatal anxiety, enhancing their stress recovery ability, and reducing the risk of labor during labor.

Description

Technical Field

[0001] The present invention relates to the technical field of maternal labor, and in particular to a method and system for psychological counseling of maternal labor analgesia based on virtual reality. Background Art

[0002] Labor pain, second only to burn pain in intensity in the medical field, has long posed a significant threat to the physical and mental well-being of pregnant women. Traditional non-pharmacological analgesia methods, such as breathing exercises and doulas, can alleviate maternal anxiety to some extent, but their effectiveness is often limited by individual differences and a lack of immersiveness. While pharmacological analgesia, such as epidural anesthesia, can effectively alleviate pain, it still presents challenges such as high dependency and potential side effects. Consequently, due to these challenges, virtual reality technology, as an emerging non-pharmacological intervention, has gradually attracted widespread attention in the medical field. The advantage of VR lies in its ability to distract mothers from pain through immersive multi-sensory experiences, such as vision, hearing, and touch. It also uses biofeedback mechanisms to regulate autonomic nervous system function, thereby reducing pain perception and stress responses. For example, VR scenarios designed to sync with the rhythm of uterine contractions can significantly improve mothers' pain tolerance and coping skills. Furthermore, the immersive VR experience can further enhance relaxation, reshape pregnant women's perception of the labor process, reduce catastrophic thinking, and foster positive psychological expectations.

[0003] However, existing technologies mostly focus on evaluating the effectiveness of immediate analgesia during labor, without correlating and analyzing the physiological characteristic data collected during the prenatal psychological counseling phase with labor risks. This results in a lack of predictability and continuity in labor intervention strategies. Furthermore, existing virtual reality technologies often use a fixed scene library, failing to consider the difficulty of dynamically adjusting the content of prenatal psychological counseling based on the mother's prenatal status and labor risks, thus weakening the effectiveness of psychological intervention. Furthermore, existing technologies often analyze psychological counseling data at the subjective scale level, lacking objectivity. They do not fully consider the objective quantification of physiological signals during the prenatal psychological counseling phase, thus limiting the objectivity and accuracy of labor risk assessments. This creates an "information island" between prenatal psychological counseling and labor analgesia intervention, making it impossible to form a comprehensive labor risk management system for pregnant women, from prevention to response.

[0004] In order to solve these problems, this application designs a method and system for psychological counseling for labor analgesia for pregnant women based on virtual reality. Summary of the Invention

[0005] The purpose of this invention is to provide a virtual reality-based psychological counseling method and system for labor analgesia in pregnant women. This method comprehensively analyzes a pregnant woman's anxiety, pain sensitivity, and stress recovery ability; based on the comprehensive analysis results, it assesses the risk of labor loss control; and, based on this risk assessment, generates an optimized prenatal VR psychological counseling strategy for the prenatal psychological counseling phase. This method achieves precise adaptation and dynamic optimization of the psychological counseling strategy, enhances pregnant women's immersion and engagement in the virtual environment, alleviates their prenatal anxiety, strengthens their stress recovery ability, and reduces the risks of labor during labor.

[0006] The present invention is achieved in that:

[0007] In a first aspect, the present invention provides a method for psychological counseling of labor analgesia for pregnant women based on virtual reality, comprising the following steps:

[0008] S1. Acquire physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage, and simultaneously acquire respiratory rhythm data of pregnant women during the prenatal psychological counseling stage;

[0009] S2. Importing the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling phase into the anxiety-pain degree coupling analysis model to analyze the anxiety-pain sensitivity of pregnant women;

[0010] S3. Importing the physiological function characteristic data and respiratory rhythm data of the pregnant woman during the prenatal psychological counseling phase into the stress recovery capacity analysis model to analyze the stress recovery capacity of the pregnant woman;

[0011] S4. Construct a labor process uncontrolled risk assessment model, import the analysis results of pregnant women's anxiety and pain sensitivity and stress recovery ability into the labor process uncontrolled risk assessment model, and assess the risk of pregnant women's labor process uncontrolled;

[0012] S5. Import the risk assessment results of labor uncontrolled pregnancy into the prenatal VR psychological counseling strategy optimization model for analysis, and generate an optimized prenatal VR psychological counseling strategy for the prenatal psychological counseling stage of pregnancy.

[0013] Preferably, the analysis of the anxiety and pain sensitivity of the pregnant woman in step S2 specifically includes:

[0014] S21, extracting physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage;

[0015] S22. Construct an anxiety-pain degree coupling analysis model, import the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage into the anxiety-pain degree coupling analysis model, analyze the anxiety-pain sensitivity of pregnant women, and obtain the analysis results of the anxiety-pain sensitivity of pregnant women.

[0016] Preferably, the process of constructing the anxiety-pain degree coupling analysis model in step S22 specifically includes:

[0017] S221. Calculating the hyperanxiety level coefficient of the pregnant woman based on the physiological function characteristic data and electromyographic signal data during the prenatal psychological counseling phase;

[0018] S222. Calculating the compensatory contraction sensitivity coefficient of the pregnant woman based on the physiological function characteristic data and electromyographic signal data during the prenatal psychological counseling phase;

[0019] S223. Analyze the anxiety and pain sensitivity of the pregnant woman based on the calculated hyperanxiety level coefficient and compensatory contraction sensitivity coefficient;

[0020] The calculation formula for anxiety pain sensitivity is:

[0021] ;

[0022] Wherein, Jtm is the anxiety and pain sensitivity of pregnant women, KL is the hyperanxiety level coefficient of pregnant women, PM is the compensatory contraction sensitivity coefficient of pregnant women, Xmax is the maximum blood pressure value measured during all uterine contractions during the prenatal psychological counseling stage, and Xj is the mean blood pressure value measured during all resting periods during the prenatal psychological counseling stage.

[0023] Preferably, the analysis of the stress recovery ability of the pregnant woman in step S3 specifically includes the following steps:

[0024] S31, extracting physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage;

[0025] S32. Construct a stress recovery capacity analysis model, import the physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage into the stress recovery capacity analysis model, analyze the stress recovery capacity of pregnant women, and obtain the stress recovery capacity analysis results of pregnant women.

[0026] Preferably, the process of constructing the stress recovery ability analysis model in step S32 includes the following specific steps:

[0027] S321. Calculating the dynamic stress response capacity value of the pregnant woman based on the physiological function characteristic data and respiratory rhythm data during the prenatal psychological counseling phase;

[0028] The calculation formula of dynamic stress response capability value is:

[0029] ;

[0030] Where Dy is the dynamic stress response ability value of pregnant women, is the absolute value of the slope of the heart rate curve of the pregnant woman's heart rate recovering from the peak to the baseline value during the resting period after the i-th uterine contraction in the prenatal psychological counseling stage in the physiological function characteristic data, Rfi is the mean value of the change in respiratory rate of the pregnant woman during the i-th uterine contraction in the prenatal psychological counseling stage in the respiratory rhythm data, Sri is the standard deviation of the change in respiratory rate of the pregnant woman during the i-th uterine contraction in the prenatal psychological counseling stage in the respiratory rhythm data, ti is the time taken for the pregnant woman's heart rate to recover from the peak to the baseline value during the resting period after the i-th uterine contraction in the prenatal psychological counseling stage in the physiological function characteristic data, and tmin is the minimum value of the time taken for the pregnant woman's heart rate to recover from the peak to the baseline value during the resting period after all uterine contractions in the prenatal psychological counseling stage in the physiological function characteristic data;

[0031] S322. Calculating the steady-state metabolic balance capacity value of the pregnant woman based on the physiological function characteristic data and respiratory rhythm data during the prenatal psychological counseling phase;

[0032] The calculation formula of steady-state metabolic balance capacity is:

[0033] ;

[0034] Where Wd is the steady-state metabolic balance capacity of pregnant women, represents the mean of the covariance between blood oxygen saturation and tidal volume during all resting periods of the pregnant woman during the prenatal psychological counseling stage, Sxy represents the standard deviation of blood oxygen saturation during all resting periods of the pregnant woman during the prenatal psychological counseling stage, and Scq represents the standard deviation of tidal volume during all resting periods of the pregnant woman during the prenatal psychological counseling stage in the respiratory rhythm data;

[0035] S323. Analyzing the stress recovery ability of the pregnant woman based on the calculated dynamic stress response ability value and steady-state metabolic balance ability value of the pregnant woman;

[0036] The calculation formula for stress recovery capacity is:

[0037] ;

[0038] Where YH is the stress recovery ability of pregnant women.

[0039] Preferably, the construction of the labor process out-of-control risk assessment model in step S4 includes the following specific steps:

[0040] S41. Obtain the analyzed results of the anxiety and pain sensitivity and stress recovery ability of the pregnant woman, and extract the historical anxiety and pain sensitivity and stress recovery ability of all pregnant women with safe childbirths in history, corresponding to the task level of the prenatal VR psychological counseling strategy currently being performed by the pregnant woman, from a database of pregnant women with safe childbirths in history;

[0041] S42. Assess the risk of labor loss based on the analysis of the pregnant woman's anxiety and pain sensitivity and stress resilience.

[0042] The formula for calculating the risk of uncontrolled labor is:

[0043] ;

[0044] In the formula, CS is the risk of uncontrolled labor for pregnant women, They represent the corresponding task levels of all historical safe delivery pregnant women corresponding to the task levels of the prenatal VR psychological counseling strategy currently being carried out by the pregnant women. The maximum and minimum values ​​in the calculation results.

[0045] Preferably, in step S5, a prenatal VR psychological counseling strategy optimization model is constructed, specifically including:

[0046] S51. Obtaining the assessed risk assessment results of the pregnant woman's labor loss control;

[0047] S52. When the risk assessment result of the pregnant woman's labor out of control is greater than or equal to 1 and the task level of the pregnant woman's current prenatal VR psychological counseling strategy is not the highest level, the prenatal VR psychological counseling strategy to be carried out by the pregnant woman is adjusted to the corresponding prenatal VR psychological counseling strategy with the increased task level; when the risk assessment result of the pregnant woman's labor out of control is less than 1 and greater than or equal to 0, the current prenatal VR psychological counseling strategy is continued; when the risk assessment result of the pregnant woman's labor out of control is less than 0 and the task level of the pregnant woman's current prenatal VR psychological counseling strategy is not the lowest level When the task level is lowered, the antenatal VR psychological counseling strategy that the pregnant woman needs to perform is adjusted to the corresponding antenatal VR psychological counseling strategy after the task level is lowered; among them, when the task level of the antenatal VR psychological counseling strategy currently being performed by the pregnant woman is the highest level and the risk assessment result of the pregnant woman's labor out of control is greater than or equal to 1, the current antenatal VR psychological counseling strategy will be continued, and the doctor will be reminded that the risk of the pregnant woman's labor out of control is too high; when the task level of the antenatal VR psychological counseling strategy currently being performed by the pregnant woman is the lowest level and the risk assessment result of the pregnant woman's labor out of control is less than 0, the current antenatal VR psychological counseling strategy will be continued.

[0048] In a second aspect, the present invention provides a psychological counseling system for labor pain relief for pregnant women based on virtual reality, comprising:

[0049] A data acquisition module is used to obtain physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage, and simultaneously obtain respiratory rhythm data of pregnant women during the prenatal psychological counseling stage;

[0050] Anxiety-pain degree coupling analysis module, which is used to import the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage into the anxiety-pain degree coupling analysis model to analyze the anxiety-pain sensitivity of pregnant women;

[0051] The stress recovery capacity analysis module is used to import the physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage into the stress recovery capacity analysis model to analyze the stress recovery capacity of pregnant women;

[0052] The labor process uncontrolled risk assessment module is used to build a labor process uncontrolled risk assessment model. The results of the analysis of the anxiety and pain sensitivity level and stress recovery ability of pregnant women are imported into the labor process uncontrolled risk assessment model to assess the risk of labor process uncontrolled pregnancy.

[0053] The prenatal VR psychological counseling strategy optimization module is used to import the risk assessment results of uncontrolled labor of pregnant women into the prenatal VR psychological counseling strategy optimization model for analysis, and generate an optimized prenatal VR psychological counseling strategy for pregnant women during the prenatal psychological counseling stage;

[0054] The control module is used to control the operation of the data acquisition module, the anxiety-pain degree coupling analysis module, the stress recovery ability analysis module, the labor process uncontrolled risk assessment module, and the prenatal VR psychological counseling strategy optimization module.

[0055] In a third aspect, the present invention provides an electronic device comprising: a processor and a memory, wherein the memory stores a computer program that can be called by the processor, and the processor executes a virtual reality-based psychological counseling method for labor analgesia for pregnant women by calling the computer program stored in the memory.

[0056] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0057] The present invention analyzes the anxiety and pain sensitivity of pregnant women through the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage; analyzes the stress recovery ability of pregnant women through the physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage; evaluates the risk of uncontrolled labor of pregnant women based on the analysis results of the anxiety and pain sensitivity and the stress recovery ability of pregnant women; generates an optimized prenatal VR psychological counseling strategy for the prenatal psychological counseling stage of pregnant women based on the assessment results of the risk of uncontrolled labor of pregnant women; can achieve precise adaptation and dynamic optimization of psychological counseling strategies, enhance the immersive experience and participation of pregnant women in the virtual environment, relieve their prenatal anxiety, enhance stress recovery ability, and reduce the risk of delivery during labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0059] Figure 1 This is a schematic diagram of the overall process of the virtual reality-based psychological counseling method for labor analgesia for pregnant women of the present invention;

[0060] Figure 2 This is a schematic structural diagram of the virtual reality-based psychological counseling system for labor pain relief for pregnant women of the present invention;

[0061] Figure 3 This is an analysis flow chart of step S2 of the virtual reality-based psychological counseling method for labor analgesia for pregnant women of the present invention;

[0062] Figure 4 This is an analysis flow chart of step S3 of the virtual reality-based psychological counseling method for labor analgesia for pregnant women of the present invention. DETAILED DESCRIPTION

[0063] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0064] Example 1

[0065] like Figure 1 As shown, this embodiment provides a method for psychological counseling of labor pain relief for pregnant women based on virtual reality, which specifically includes the following steps:

[0066] S1. Acquire physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage, and simultaneously acquire respiratory rhythm data of pregnant women during the prenatal psychological counseling stage;

[0067] S2. Importing the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling phase into the anxiety-pain degree coupling analysis model to analyze the anxiety-pain sensitivity of pregnant women;

[0068] S3. Importing the physiological function characteristic data and respiratory rhythm data of the pregnant woman during the prenatal psychological counseling phase into the stress recovery capacity analysis model to analyze the stress recovery capacity of the pregnant woman;

[0069] S4. Construct a labor process uncontrolled risk assessment model, import the analysis results of pregnant women's anxiety and pain sensitivity and stress recovery ability into the labor process uncontrolled risk assessment model, and assess the risk of pregnant women's labor process uncontrolled;

[0070] S5. Import the risk assessment results of labor uncontrolled pregnancy into the prenatal VR psychological counseling strategy optimization model for analysis, and generate an optimized prenatal VR psychological counseling strategy for the prenatal psychological counseling stage of pregnancy.

[0071] In this embodiment, if Figure 3 As shown, in step S2, the anxiety and pain sensitivity of the pregnant woman is analyzed, specifically including:

[0072] S21, extracting physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage;

[0073] S22. Construct an anxiety-pain degree coupling analysis model, import the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage into the anxiety-pain degree coupling analysis model, analyze the anxiety-pain sensitivity of pregnant women, and obtain the analysis results of the anxiety-pain sensitivity of pregnant women.

[0074] In this embodiment, the process of constructing the anxiety-pain degree coupling analysis model in step S22 specifically includes:

[0075] S221. Calculating the hyperanxiety level coefficient of the pregnant woman based on the physiological function characteristic data and electromyographic signal data during the prenatal psychological counseling phase;

[0076] The calculation formula of the hyperanxiety level coefficient is:

[0077] ;

[0078] Where KL is the coefficient of the hyperanxiety level of pregnant women, Fg is the mean of the ratio of low-frequency heart rate variability to high-frequency heart rate variability in all uterine contractions of pregnant women in the prenatal psychological counseling stage in the physiological function characteristic data, Fj is the mean of the ratio of low-frequency heart rate variability to high-frequency heart rate variability in all resting periods of pregnant women in the prenatal psychological counseling stage in the physiological function characteristic data, Ue is the mean of the skin conductance level of pregnant women in all resting periods in the prenatal psychological counseling stage in the electromyographic signal data, and Se is the standard deviation of the skin conductance level of pregnant women in all uterine contractions in the prenatal psychological counseling stage in the electromyographic signal data;

[0079] For example, in the frequency domain analysis of heart rate variability, the frequency band division of low-frequency components and high-frequency components strictly follows the international physiological signal processing standards. The low-frequency component band is 0.04–0.15 Hz, which is used to reflect the joint regulatory effect of the sympathetic and parasympathetic nerves, but is more biased towards sympathetic nerve activity; the high-frequency component band is 0.15–0.40 Hz, which is mainly regulated by the parasympathetic nerves, is directly related to respiratory sinus arrhythmia, and can reflect the inhibitory ability of the parasympathetic nerves. This embodiment uses the ratio of low-frequency heart rate variability to high-frequency heart rate variability to quantify the balance state of the sympathetic and parasympathetic nerves of pregnant women during the prenatal psychological counseling stage. Specifically, when pregnant women experience anxiety or stress during the prenatal psychological counseling stage, their sympathetic nerves are activated, resulting in a significant increase in the ratio of low-frequency heart rate variability to high-frequency heart rate variability. Furthermore, this embodiment uses the mean ratio of low-frequency heart rate variability to high-frequency heart rate variability of pregnant women during the resting period to eliminate differences in individual basal autonomic nervous system states. For example, pregnant women with long-term anxiety have a higher mean ratio of low-frequency heart rate variability to high-frequency heart rate variability during the resting period than pregnant women in other normal conditions. This ensures that the calculation formula for the hyperanxiety level coefficient used in this embodiment can eliminate baseline differences, avoiding pregnant women with a higher mean ratio of low-frequency heart rate variability to high-frequency heart rate variability during the resting period from being misjudged as having increased anxiety during the prenatal psychological counseling stage.

[0080] Exemplarily, this embodiment quantifies the degree of anxiety arousal of pregnant women during contractions by the standard deviation of skin conductance levels during contractions. The larger the standard deviation of skin conductance levels during contractions, the more intense the emotional fluctuations of pregnant women during contractions. This embodiment also normalizes the standard deviation of skin conductance levels during contractions by the mean of resting skin conductance, thereby reducing the impact of individual skin conductance baseline value differences on the quantification of the degree of anxiety arousal of pregnant women. This embodiment ensures that the hyperanxiety level coefficient can only reflect the nervous hyperactivity and emotional anxiety level of pregnant women during contractions by analyzing the balance of sympathetic and parasympathetic nerves and the degree of anxiety arousal of pregnant women during the prenatal psychological counseling stage, thereby avoiding the influence of the long-term physiological characteristics of pregnant women on the hyperanxiety level coefficient. Specifically, the higher the hyperanxiety level coefficient, the stronger the synergistic effect of sympathetic hyperactivity and emotional stress produced by pregnant women during contractions.

[0081] S222. Calculating the compensatory contraction sensitivity coefficient of the pregnant woman based on the physiological function characteristic data and electromyographic signal data during the prenatal psychological counseling phase;

[0082] The calculation formula of compensatory contraction sensitivity coefficient is:

[0083] ;

[0084] Where PM is the compensatory contraction sensitivity coefficient of the pregnant woman, n is the cumulative number of uterine contractions of the pregnant woman in the prenatal psychological counseling stage in the physiological function characteristic data, Ti is the duration of the i-th uterine contraction of the pregnant woman in the prenatal psychological counseling stage in the physiological function characteristic data, Rsi is the root mean square value of the electromyographic signal measured during the i-th uterine contraction of the pregnant woman in the prenatal psychological counseling stage in the electromyographic signal data, Asi is the approximate entropy of the electromyographic signal of the pregnant woman in the i-th uterine contraction of the prenatal psychological counseling stage calculated by the approximate entropy algorithm in the electromyographic signal data, and k is the standard value of the accumulated electromyographic energy, in units of In this embodiment, the method for obtaining the standard value of the accumulated electromyographic energy is as follows: obtaining the minimum value of the root mean square value of the electromyographic signal measured during all uterine contractions in the antenatal psychological counseling stage of all pregnant women who have had safe deliveries in history corresponding to the task level of the antenatal VR psychological counseling strategy currently being performed by the pregnant woman, and the duration of the uterine contraction corresponding to the minimum value of the root mean square value of the electromyographic signal, and taking the product of the minimum value of the root mean square value of the electromyographic signal and the duration of the corresponding uterine contraction as the standard value of the accumulated electromyographic energy of the pregnant woman; the calculation process of the approximate entropy of the electromyographic signal is an existing technology, so it will not be repeated here.

[0085] Exemplarily, this embodiment evaluates the compensatory response of pregnant women to uterine contraction pain through the time domain and nonlinear characteristics of the electromyographic signals during the uterine contraction period in the prenatal psychological counseling stage; specifically, the electromyographic root mean square value is used to reflect the strength of the pregnant woman's muscle contraction during the uterine contraction period. The enhanced compensatory contraction during pain will lead to an increase in the electromyographic root mean square value; the electromyographic approximate entropy is used to measure the complexity of the signal. When there is pain, the muscle activity tends to be regularized, that is, the signal complexity decreases and the electromyographic approximate entropy decreases. Furthermore, this embodiment also quantifies the cumulative effect of muscle load through the duration of uterine contraction. The longer the duration, the more significant the fatigue. Numerator The denominator, the myoelectric approximate entropy, is used to integrate contraction intensity and duration. It amplifies the negative effects of low complexity through its inverse, and reflects the overall compensatory effect of multiple contractions through cumulative averaging. A higher compensatory contraction sensitivity coefficient indicates a stronger compensatory response to pain and a lower pain threshold.

[0086] S223. Analyze the anxiety and pain sensitivity of the pregnant woman based on the calculated hyperanxiety level coefficient and compensatory contraction sensitivity coefficient;

[0087] The calculation formula for anxiety pain sensitivity is:

[0088] ;

[0089] Wherein, Jtm is the anxiety and pain sensitivity of pregnant women, KL is the hyperanxiety level coefficient of pregnant women, PM is the compensatory contraction sensitivity coefficient of pregnant women, Xmax is the maximum blood pressure value measured during all uterine contractions during the prenatal psychological counseling stage, and Xj is the mean blood pressure value measured during all resting periods during the prenatal psychological counseling stage.

[0090] For example, this embodiment uses multimodal data fusion to comprehensively evaluate the interactive effect of anxiety and pain. Sympathetic nerve hyperactivity is nonlinearly coupled with pain compensation to avoid a single indicator dominating the result; this embodiment also introduces a blood pressure fluctuation parameter to Calculations are performed to quantify the cardiovascular load caused by acute sympathetic nerve stress; the greater the blood pressure fluctuation, the stronger the contribution of several items to the anxiety and pain sensitivity of pregnant women; it can comprehensively reflect whether there is a vicious cycle of "anxiety-pain-cardiovascular stress" in pregnant women during the prenatal psychological counseling stage; when the anxiety and pain sensitivity of pregnant women is higher, it indicates that the prenatal VR psychological counseling strategy for pregnant women needs to be optimized.

[0091] In this embodiment, if Figure 4 As shown, step S3 analyzes the stress recovery ability of pregnant women, which specifically includes the following steps:

[0092] S31, extracting physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage;

[0093] S32. Construct a stress recovery capacity analysis model, import the physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage into the stress recovery capacity analysis model, analyze the stress recovery capacity of pregnant women, and obtain the stress recovery capacity analysis results of pregnant women.

[0094] In this embodiment, the process of constructing the stress recovery ability analysis model in step S32 includes the following specific steps:

[0095] S321. Calculating the dynamic stress response capacity value of the pregnant woman based on the physiological function characteristic data and respiratory rhythm data during the prenatal psychological counseling phase;

[0096] The calculation formula of dynamic stress response capability value is:

[0097] ;

[0098] Where Dy is the dynamic stress response ability value of pregnant women, is the absolute value of the slope of the heart rate curve of the pregnant woman's heart rate recovering from the peak value to the baseline value during the resting period after the i-th contraction in the prenatal psychological counseling stage in the physiological function characteristic data, Rfi is the mean value of the change in respiratory rate of the pregnant woman during the i-th contraction in the prenatal psychological counseling stage in the respiratory rhythm data, Sri is the standard deviation of the change in respiratory rate of the pregnant woman during the i-th contraction in the prenatal psychological counseling stage in the respiratory rhythm data, ti is the time taken for the pregnant woman's heart rate to recover from the peak value to the baseline value during the resting period after the i-th contraction in the prenatal psychological counseling stage in the physiological function characteristic data, and tmin is the minimum value of the time taken for the pregnant woman's heart rate to recover from the peak value to the baseline value during the resting period after all contractions in the prenatal psychological counseling stage in the physiological function characteristic data; among which, in the case of the heart rate recovering from the peak value to the baseline value during the resting period, the baseline value during the resting period is the average value of the heart rate of the pregnant woman in all resting periods before the labor loss control risk assessment was performed during the prenatal psychological counseling stage;

[0099] For example, this embodiment further evaluates the ability of pregnant women to recover quickly after uterine contraction by analyzing the coordination of heart rate and breathing; the heart rate recovery slope is used to reflect the reactivation efficiency of the pregnant woman's parasympathetic nerves. The larger the absolute value of the heart rate recovery slope, the faster the pregnant woman recovers after uterine contraction; the ratio of the mean and standard deviation of respiratory rate is used to quantify the stability of the pregnant woman's respiratory rhythm. When the ratio of the mean and standard deviation of respiratory rate is higher, it indicates that the pregnant woman's respiratory control is more stable; further, this embodiment also uses the index term Used to punish pregnant women who take too long to recover after a contraction; specifically, the calculation formula for the dynamic stress response ability value provided in this embodiment is through the cumulative average comprehensive recovery performance of the pregnant woman after multiple contractions. When the dynamic stress response ability value is higher, it indicates that the pregnant woman can quickly recover from the stress state during the contraction period.

[0100] S322. Calculating the steady-state metabolic balance capacity value of the pregnant woman based on the physiological function characteristic data and respiratory rhythm data during the prenatal psychological counseling phase;

[0101] The calculation formula of steady-state metabolic balance capacity is:

[0102] ;

[0103] Where Wd is the steady-state metabolic balance capacity of pregnant women, represents the mean of the covariance between blood oxygen saturation and tidal volume during all resting periods of the pregnant woman during the prenatal psychological counseling stage, Sxy represents the standard deviation of blood oxygen saturation during all resting periods of the pregnant woman during the prenatal psychological counseling stage, and Scq represents the standard deviation of tidal volume during all resting periods of the pregnant woman during the prenatal psychological counseling stage in the respiratory rhythm data;

[0104] For example, this embodiment evaluates the steady-state metabolic balance ability of pregnant women by the coordinated changes in blood oxygen saturation and tidal volume. It is used to reflect the degree of matching between oxygen supply and demand of pregnant women. The larger the value, the higher the blood oxygen level when the pregnant woman's breathing deepens (the tidal volume Cq increases), and the higher the metabolic efficiency. It is the product of the standard deviation of blood oxygen saturation and tidal volume, and is used to normalize the covariance and eliminate the impact of individual baseline differences in pregnant women on the steady-state metabolic balance capacity value. Specifically, when the steady-state metabolic balance capacity value is higher, it indicates that the pregnant woman can effectively maintain oxygen metabolic balance during the resting period and can provide energy support for the recovery of the stress state after the subsequent uterine contraction period.

[0105] S323. Analyzing the stress recovery ability of the pregnant woman based on the calculated dynamic stress response ability value and steady-state metabolic balance ability value of the pregnant woman;

[0106] The calculation formula for stress recovery capacity is:

[0107] ;

[0108] Where YH is the stress recovery ability of pregnant women.

[0109] For example, this example uses the harmonic mean to comprehensively analyze dynamic stress response and steady-state metabolism, emphasizing their synergistic optimization for pregnant women's stress recovery. The harmonic mean used in this example is more sensitive to low values, fully demonstrating that deficiencies in either the dynamic stress response or steady-state metabolic balance of pregnant women will limit their overall stress recovery. Specifically, a higher stress recovery capacity indicates a balance between dynamic recovery and steady-state metabolism.

[0110] In this embodiment, the construction of the labor process out-of-control risk assessment model in step S4 includes the following specific steps:

[0111] S41. Obtain the analyzed results of the anxiety and pain sensitivity and stress recovery ability of the pregnant woman, and extract the historical anxiety and pain sensitivity and stress recovery ability of all pregnant women with safe childbirths in history, corresponding to the task level of the prenatal VR psychological counseling strategy currently being performed by the pregnant woman, from a database of pregnant women with safe childbirths in history;

[0112] S42. Assess the risk of labor loss based on the analysis of the pregnant woman's anxiety and pain sensitivity and stress resilience.

[0113] The formula for calculating the risk of uncontrolled labor is:

[0114] ;

[0115] In the formula, CS is the risk of uncontrolled labor for pregnant women, They represent the corresponding task levels of all historical safe delivery pregnant women corresponding to the task levels of the prenatal VR psychological counseling strategy currently being carried out by the pregnant women. The maximum and minimum values ​​in the calculation results.

[0116] For example, this embodiment normalizes the historical anxiety and pain sensitivity and stress recovery ability of pregnant women who have had safe deliveries in the past, and maps the ratio of the current pregnant woman's anxiety and pain sensitivity to stress recovery ability to the range of 0–1, thereby quantifying the risk deviation of the pregnant woman relative to historical safe pregnant women of the same task level; specifically, in this embodiment, Reflecting the antagonistic relationship between anxiety pain and recovery ability, when pregnant women are compared with the historical safe pregnant women of the same task level The greater the deviation, the greater the risk of loss of labor control.

[0117] In this embodiment, step S5 constructs a prenatal VR psychological counseling strategy optimization model, which specifically includes:

[0118] S51. Obtaining the assessed risk assessment results of the pregnant woman's labor loss control;

[0119] S52. When the risk assessment result of the pregnant woman's labor out of control is greater than or equal to 1 and the task level of the pregnant woman's current prenatal VR psychological counseling strategy is not the highest level, the prenatal VR psychological counseling strategy to be carried out by the pregnant woman is adjusted to the corresponding prenatal VR psychological counseling strategy with the increased task level; when the risk assessment result of the pregnant woman's labor out of control is less than 1 and greater than or equal to 0, the current prenatal VR psychological counseling strategy is continued; when the risk assessment result of the pregnant woman's labor out of control is less than 0 and the task level of the pregnant woman's current prenatal VR psychological counseling strategy is not the lowest level When the task level is lowered, the antenatal VR psychological counseling strategy that the pregnant woman needs to perform is adjusted to the corresponding antenatal VR psychological counseling strategy after the task level is lowered; among them, when the task level of the antenatal VR psychological counseling strategy currently being performed by the pregnant woman is the highest level and the risk assessment result of the pregnant woman's labor out of control is greater than or equal to 1, the current antenatal VR psychological counseling strategy will be continued, and the doctor will be reminded that the risk of the pregnant woman's labor out of control is too high; when the task level of the antenatal VR psychological counseling strategy currently being performed by the pregnant woman is the lowest level and the risk assessment result of the pregnant woman's labor out of control is less than 0, the current antenatal VR psychological counseling strategy will be continued.

[0120] Exemplarily, the task levels of the prenatal VR psychological counseling strategy in this embodiment are divided into three levels. The prenatal VR psychological counseling strategies corresponding to the levels from small to large are: Level 1 prenatal VR psychological counseling strategy: mild muscle relaxation training strategy, Level 2 prenatal VR psychological counseling strategy: consolidation of adaptability training strategy, Level 3 prenatal VR psychological counseling strategy: pain simulation coping training strategy; Exemplarily, in this embodiment, Level 1 prenatal VR psychological counseling strategy: mild muscle relaxation training strategy mainly includes: muscle relaxation training and meditation mindfulness training by setting VR scenes (for example, setting a quiet beach or forest or other meditation scene as a VR scene); Level 2 prenatal VR psychological counseling strategy: consolidation of adaptability training strategy mainly includes: breathing coordination training and pain tolerance training by setting VR scenes (for example, setting a uterine contraction pain simulation scene as a VR scene); Level 3 prenatal VR psychological counseling strategy: pain simulation coping training strategy mainly includes: exposure therapy training by setting VR scenes (for example, setting a virtual delivery room environment as a VR scene);

[0121] Exemplarily, this embodiment performs graded intervention based on the risk assessment results of uncontrolled labor of pregnant women, and dynamically adapts the prenatal VR psychological counseling strategy required by pregnant women through the physiological state of pregnant women to ensure the personalization and safety of VR training; exemplarily, in this embodiment, when the risk assessment result of uncontrolled labor of pregnant women is greater, it indicates that the prenatal VR psychological counseling strategy of pregnant women needs to be upgraded to the relevant psychological counseling strategy of pain simulation coping training, and the tolerance of pregnant women in actual labor is enhanced through exposure therapy; when the risk assessment result of uncontrolled labor of pregnant women is smaller, it indicates that the prenatal VR psychological counseling strategy of pregnant women can be downgraded to the relevant psychological counseling strategy of mild muscle relaxation training, so as to avoid excessive stress in pregnant women during actual labor; based on the above-mentioned technical method of performing graded intervention based on the risk assessment results of uncontrolled labor of pregnant women, thereby optimizing the prenatal VR psychological counseling strategy, this embodiment dynamically adjusts and optimizes the prenatal VR psychological counseling strategy through closed-loop feedback, which can significantly improve the psychological adaptability and natural delivery rate of pregnant women.

[0122] Example 2

[0123] like Figure 2 As shown, this embodiment provides a psychological counseling system for labor pain relief for pregnant women based on virtual reality, including:

[0124] A data acquisition module is used to obtain physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage, and simultaneously obtain respiratory rhythm data of pregnant women during the prenatal psychological counseling stage;

[0125] Anxiety-pain degree coupling analysis module, which is used to import the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage into the anxiety-pain degree coupling analysis model to analyze the anxiety-pain sensitivity of pregnant women;

[0126] The stress recovery capacity analysis module is used to import the physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage into the stress recovery capacity analysis model to analyze the stress recovery capacity of pregnant women;

[0127] The labor process uncontrolled risk assessment module is used to build a labor process uncontrolled risk assessment model. The results of the analysis of the anxiety and pain sensitivity level and stress recovery ability of pregnant women are imported into the labor process uncontrolled risk assessment model to assess the risk of labor process uncontrolled pregnancy.

[0128] The prenatal VR psychological counseling strategy optimization module is used to import the risk assessment results of uncontrolled labor of pregnant women into the prenatal VR psychological counseling strategy optimization model for analysis, and generate an optimized prenatal VR psychological counseling strategy for pregnant women during the prenatal psychological counseling stage;

[0129] The control module is used to control the operation of the data acquisition module, the anxiety-pain degree coupling analysis module, the stress recovery ability analysis module, the labor process uncontrolled risk assessment module, and the prenatal VR psychological counseling strategy optimization module.

[0130] The above-mentioned parameters and steps for each unit module to achieve corresponding functions in the virtual reality-based psychological counseling system for labor analgesia for pregnant women of the present invention can be referred to the parameters and steps in the embodiment of the virtual reality-based psychological counseling method for labor analgesia for pregnant women above, and will not be repeated here.

[0131] Example 3

[0132] An electronic device according to an embodiment of the present invention includes: a processor and a memory, wherein the memory stores a computer program that can be called by the processor, and the processor executes a method for psychological counseling for labor analgesia for pregnant women based on virtual reality by calling the computer program stored in the memory. It should be noted that all computer programs of the method for psychological counseling for labor analgesia for pregnant women based on virtual reality are implemented in C language, wherein the data acquisition module, the anxiety-pain degree coupling analysis module, the stress recovery ability analysis module, the labor process uncontrolled risk assessment module, the prenatal VR psychological counseling strategy optimization module, and the control module are all controlled by a remote server.

[0133] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0134] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for psychological counseling of labor pain relief for pregnant women based on virtual reality, characterized in that: The steps include: S1. Acquire physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage, and simultaneously acquire respiratory rhythm data of pregnant women during the prenatal psychological counseling stage; S2. Importing the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling phase into the anxiety-pain degree coupling analysis model to analyze the anxiety-pain sensitivity of pregnant women; specifically including: S21, extracting physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage; S22. Construct an anxiety-pain degree coupling analysis model, import the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage into the anxiety-pain degree coupling analysis model, analyze the anxiety-pain sensitivity of pregnant women, and obtain the analysis results of the anxiety-pain sensitivity of pregnant women; specifically including: S221. Calculating the hyperanxiety level coefficient of the pregnant woman based on the physiological function characteristic data and electromyographic signal data during the prenatal psychological counseling phase; S222. Calculating the compensatory contraction sensitivity coefficient of the pregnant woman based on the physiological function characteristic data and electromyographic signal data during the prenatal psychological counseling phase; S223. Analyze the anxiety and pain sensitivity of the pregnant woman based on the calculated hyperanxiety level coefficient and compensatory contraction sensitivity coefficient; The calculation formula for anxiety pain sensitivity is: ； Wherein, Jtm is the anxiety and pain sensitivity of pregnant women, KL is the hyperanxiety level coefficient of pregnant women, PM is the compensatory contraction sensitivity coefficient of pregnant women, Xmax is the maximum blood pressure value measured during all uterine contractions during the prenatal psychological counseling stage, and Xj is the mean blood pressure value measured during all resting periods during the prenatal psychological counseling stage. S3. Importing the physiological function characteristic data and respiratory rhythm data of the pregnant woman during the prenatal psychological counseling stage into the stress recovery ability analysis model to analyze the stress recovery ability of the pregnant woman; specifically, the following steps are included: S31, extracting physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage; S32. Constructing a stress recovery capacity analysis model, importing the physiological function characteristic data and respiratory rhythm data of the pregnant woman during the prenatal psychological counseling stage into the stress recovery capacity analysis model, analyzing the stress recovery capacity of the pregnant woman, and obtaining the stress recovery capacity analysis results of the pregnant woman; the steps include: S321. Calculating the dynamic stress response capacity value of the pregnant woman based on the physiological function characteristic data and respiratory rhythm data during the prenatal psychological counseling phase; The calculation formula of dynamic stress response capability value is: ； Where Dy is the dynamic stress response ability value of pregnant women, is the absolute value of the slope of the heart rate curve of the pregnant woman's heart rate recovering from the peak to the baseline value during the resting period after the i-th uterine contraction in the prenatal psychological counseling stage in the physiological function characteristic data, Rfi is the mean value of the change in respiratory rate of the pregnant woman during the i-th uterine contraction in the prenatal psychological counseling stage in the respiratory rhythm data, Sri is the standard deviation of the change in respiratory rate of the pregnant woman during the i-th uterine contraction in the prenatal psychological counseling stage in the respiratory rhythm data, ti is the time taken for the pregnant woman's heart rate to recover from the peak to the baseline value during the resting period after the i-th uterine contraction in the prenatal psychological counseling stage in the physiological function characteristic data, and tmin is the minimum value of the time taken for the pregnant woman's heart rate to recover from the peak to the baseline value during the resting period after all uterine contractions in the prenatal psychological counseling stage in the physiological function characteristic data; S322. Calculating the steady-state metabolic balance capacity value of the pregnant woman based on the physiological function characteristic data and respiratory rhythm data during the prenatal psychological counseling phase; The calculation formula of steady-state metabolic balance capacity is: ； Where Wd is the steady-state metabolic balance capacity of pregnant women, represents the mean of the covariance between blood oxygen saturation and tidal volume during all resting periods of the pregnant woman during the prenatal psychological counseling stage, Sxy represents the standard deviation of blood oxygen saturation during all resting periods of the pregnant woman during the prenatal psychological counseling stage, and Scq represents the standard deviation of tidal volume during all resting periods of the pregnant woman during the prenatal psychological counseling stage in the respiratory rhythm data; S323. Analyzing the stress recovery ability of the pregnant woman based on the calculated dynamic stress response ability value and steady-state metabolic balance ability value of the pregnant woman; The calculation formula for stress recovery capacity is: ； Where, YH is the stress recovery ability of pregnant women; S4. Construct a labor uncontrolled risk assessment model, import the analysis results of pregnant women's anxiety and pain sensitivity and stress recovery ability into the labor uncontrolled risk assessment model, and assess the risk of labor uncontrolled risk of pregnant women; the specific steps include the following: S41. Obtain the analyzed results of the anxiety and pain sensitivity and stress recovery ability of the pregnant woman, and extract the historical anxiety and pain sensitivity and stress recovery ability of all pregnant women with safe childbirths in history, corresponding to the task level of the prenatal VR psychological counseling strategy currently being performed by the pregnant woman, from a database of pregnant women with safe childbirths in history; S42. Assess the risk of labor loss based on the analysis of the pregnant woman's anxiety and pain sensitivity and stress resilience. The formula for calculating the risk of uncontrolled labor is: ； In the formula, CS is the risk of uncontrolled labor for pregnant women, They represent the corresponding task levels of all historical safe delivery pregnant women corresponding to the task levels of the prenatal VR psychological counseling strategy currently being carried out by the pregnant women. The maximum and minimum values ​​in the calculation results; S5. Import the risk assessment results of labor uncontrolled pregnancy into the prenatal VR psychological counseling strategy optimization model for analysis, and generate an optimized prenatal VR psychological counseling strategy for the prenatal psychological counseling stage of pregnancy.

2. The method for psychological counseling of labor pain relief for pregnant women based on virtual reality according to claim 1, characterized in that: The step S5 constructs a prenatal VR psychological counseling strategy optimization model, specifically including: S51. Obtaining the assessed risk assessment results of the pregnant woman's labor loss control; S52. When the risk assessment result of the pregnant woman's labor out of control is greater than or equal to 1 and the task level of the pregnant woman's current prenatal VR psychological counseling strategy is not the highest level, the prenatal VR psychological counseling strategy to be carried out by the pregnant woman is adjusted to the corresponding prenatal VR psychological counseling strategy with the increased task level; when the risk assessment result of the pregnant woman's labor out of control is less than 1 and greater than or equal to 0, the current prenatal VR psychological counseling strategy is continued; when the risk assessment result of the pregnant woman's labor out of control is less than 0 and the task level of the pregnant woman's current prenatal VR psychological counseling strategy is not the lowest level When the task level is lowered, the antenatal VR psychological counseling strategy that the pregnant woman needs to perform is adjusted to the corresponding antenatal VR psychological counseling strategy after the task level is lowered; among them, when the task level of the antenatal VR psychological counseling strategy currently being performed by the pregnant woman is the highest level and the risk assessment result of the pregnant woman's labor out of control is greater than or equal to 1, the current antenatal VR psychological counseling strategy will be continued, and the doctor will be reminded that the risk of the pregnant woman's labor out of control is too high; when the task level of the antenatal VR psychological counseling strategy currently being performed by the pregnant woman is the lowest level and the risk assessment result of the pregnant woman's labor out of control is less than 0, the current antenatal VR psychological counseling strategy will be continued.

3. A virtual reality-based psychological counseling system for labor analgesia for pregnant women, used to implement the virtual reality-based psychological counseling method for labor analgesia for pregnant women as described in any one of claims 1-2, characterized in that: The system comprises: A data acquisition module is used to obtain physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage, and simultaneously obtain respiratory rhythm data of pregnant women during the prenatal psychological counseling stage; Anxiety-pain degree coupling analysis module, which is used to import the physiological function characteristic data and electromyographic signal data of pregnant women during the prenatal psychological counseling stage into the anxiety-pain degree coupling analysis model to analyze the anxiety-pain sensitivity of pregnant women; The stress recovery capacity analysis module is used to import the physiological function characteristic data and respiratory rhythm data of pregnant women during the prenatal psychological counseling stage into the stress recovery capacity analysis model to analyze the stress recovery capacity of pregnant women; The labor process uncontrolled risk assessment module is used to build a labor process uncontrolled risk assessment model. The results of the analysis of the anxiety and pain sensitivity level and stress recovery ability of pregnant women are imported into the labor process uncontrolled risk assessment model to assess the risk of labor process uncontrolled pregnancy. The prenatal VR psychological counseling strategy optimization module is used to import the risk assessment results of uncontrolled labor of pregnant women into the prenatal VR psychological counseling strategy optimization model for analysis, and generate an optimized prenatal VR psychological counseling strategy for pregnant women during the prenatal psychological counseling stage; A control module is used to control the operation of the data acquisition module, the anxiety-pain degree coupling analysis module, the stress recovery ability analysis module, the labor process uncontrolled risk assessment module, and the prenatal VR psychological counseling strategy optimization module.

4. An electronic device comprising: A processor and a memory, wherein the memory stores a computer program that can be called by the processor; characterized in that the processor executes the virtual reality-based psychological counseling method for labor analgesia for pregnant women as described in any one of claims 1-2 by calling the computer program stored in the memory.

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