A system for assisting pregnant women in natural childbirth

Abstract

The present invention relates to a system for assisting pregnant women in natural childbirth, comprising: a fetal heart monitor, which is used to monitor changes in uterine cavity pressure during childbirth by means of a pressure probe placed on the pregnant woman's abdominal wall; and a stimulation generator, which provides stimulation signals corresponding to the changes in uterine cavity pressure provided by the fetal heart monitor. The stimulation generator has a communication unit, which is used to obtain a uterine cavity pressure change signal related to the corresponding pregnant woman from the fetal heart monitor and provide the uterine cavity pressure change signal to a processing unit of the stimulation generator. The processing unit of the stimulation generator determines the timing, intensity, and duration of the stimulation signal by analyzing the changes in uterine cavity pressure. While providing stimulation signals to guide pregnant women to perform correct breathing movements, the present invention can also use the stimulation signals to relieve pain in the lumbar and sacral regions of pregnant women. While relieving discomfort in the lumbar and sacral regions, it helps the waist and abdominal muscles to work synergistically to promote natural childbirth.

Description

Technical Field

[0001] The present invention relates to the technical field of delivery assistance, and in particular to a system for assisting pregnant women in natural delivery. Background Art

[0002] During the early stages of labor, known as early labor, pregnant women experience regular uterine contractions accompanied by rapid changes in intrauterine pressure (uterine pressure), resulting in significant peaks. Peak uterine pressure during this period typically ranges from 50 to 70 mmHg. Because of its relatively low intensity, the discomfort it causes to pregnant women is not yet noticeable. According to the Numerical Pain Scale (NRS) system, the pain level at this time is generally between 3 and 5.

[0003] As labor progresses, during the active phase, regular uterine contractions not only increase in frequency, but the peak pressure in the uterine cavity can significantly increase to over 100 mmHg during each contraction, and the duration of each contraction also increases to 60 to 90 seconds. The intensity of uterine contractions during this stage increases significantly, causing the pain level felt by pregnant women to rise sharply. According to the NRS scoring standard, the pain intensity can reach the highest level, that is, level 10.

[0004] The professional guidance of a midwife is crucial during this process. Midwives can provide scientifically sound breathing techniques to help pregnant women adapt to the pain of contractions and assist them in adjusting their breathing patterns to the rhythm of contractions, thereby fostering a physiological response conducive to natural childbirth. Without professional guidance, pregnant women may spontaneously attempt to alleviate pain by altering their breathing rate and rhythm. However, these unguided methods often fail to fully adapt to the changes in contractions, potentially compromising the safety and efficiency of childbirth and increasing uncertainty and risk during natural childbirth.

[0005] In addition, pregnant women may experience pain in the lumbar and sacral regions during the early, middle, and late stages of labor, as well as after delivery. This can manifest as soreness and weakness in the lumbar and sacral regions and buttocks, limited lumbar mobility, and tenderness in the paravertebral region, sacroiliac joints, and gluteus medius. This pain may be due to hormonal changes during pregnancy that cause the pelvic and lumbar ligaments to relax, increasing pelvic width and providing more space for the fetus. At the same time, the forward shift in center of gravity caused by fetal growth causes the pelvis to tilt forward, which compresses the lumbar spine and lumbar nerves and muscles, further exacerbating the symptoms of low back pain during delivery. In response to the above situations, taking appropriate preventive measures and relief methods is of great significance in alleviating the pain of pregnant women and ensuring a smooth delivery.

[0006] CN116785110A discloses a clinical assisted delivery device. Through a combination of mechanical structures, such as a positioning platform, a delivery bed, and their internal components, it enables autonomous adjustment of the hip joint opening and closing, alleviating the strain exerted by the mother. The device also features a guide component and a pressure component to guide and regulate the mother's respiratory rate during delivery.

[0007] However, the device in this document mainly focuses on the design of the mechanical structure and lacks direct monitoring of changes in intrauterine pressure (uterine pressure) during contractions. It does not provide the function of adjusting the stimulation signal according to the changes in uterine pressure or guiding pregnant women to perform corresponding breathing movements, which may lead to failure to fully respond to the dynamic needs of the delivery process in actual applications. In addition, the document does not describe in detail how to deal with the pain problem during delivery, especially when faced with different degrees of pain caused by contractions of different intensities, it lacks targeted solutions. This means that in the case of high-intensity contractions, if you rely solely on pressure to guide breathing, it may not be enough to effectively relieve the pain of pregnant women, thereby affecting the delivery experience.

[0008] In addition, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making the present invention, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the present invention does not have the characteristics of these prior arts. On the contrary, the present invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background technology. Summary of the Invention

[0009] To address the problem of untrained pregnant women being unable to coordinate breathing movements with regular uterine contractions to combat pain and facilitate natural childbirth, the present invention proposes a system for assisting pregnant women in natural childbirth. This system can provide stimulation signals to guide breathing movements while also relieving pain in the pregnant woman's lumbar and sacral regions. While relieving lumbar and sacral discomfort, it also helps the waist and abdominal muscles work together to promote natural childbirth. Furthermore, the system of the present invention aims to guide pregnant women in understanding the characteristics of regular uterine contractions so that they can breathe and exercise correctly, thereby avoiding the risk of fetal distress and amniotic fluid contamination.

[0010] The present invention discloses a system for assisting pregnant women in natural childbirth, comprising: a fetal heart monitor, which is used to monitor changes in uterine cavity pressure during childbirth by means of a pressure probe placed on the abdominal wall of the pregnant woman; a stimulation generator, which provides a stimulation signal corresponding to the changes in uterine cavity pressure provided by the fetal heart monitor; the stimulation generator has a communication unit, which is used to obtain a uterine cavity pressure change signal related to the corresponding pregnant woman from the fetal heart monitor, and provide the uterine cavity pressure change signal to a processing unit of the stimulation generator, and the processing unit of the stimulation generator determines the timing, intensity and duration of the stimulation signal by analyzing the changes in uterine cavity pressure.

[0011] The system of the present invention customizes the stimulation signal according to the specific situation of each pregnant woman (such as changes in uterine pressure). The system provides personalized analgesia and breathing guidance, thereby improving the quality of the delivery experience. This personalized approach can better adapt to the needs of different individuals. By guiding pregnant women to master the characteristics of regular uterine contractions, they can breathe and exercise correctly to avoid the risk of fetal distress and amniotic fluid contamination, thereby improving the comfort level during delivery. In addition, the system automatically processes and responds to uterine pressure data, reducing the need for frequent manual intervention by medical staff, saving labor costs while also ensuring the consistency and accuracy of the stimulation parameter settings.

[0012] According to a preferred embodiment, the stimulation generator includes a stimulation unit that is communicatively connected to the processing unit. The stimulation unit performs specific stimulation actions according to the instructions issued by the processing unit to assist pregnant women in managing pain and breathing rhythm during childbirth. The stimulation unit can apply current stimulation with different pulse intensities with the help of the electrical stimulation module, and / or apply physical vibration stimulation with different frequencies and amplitudes with the help of the massage stimulation module. The stimulation unit dynamically adjusts the stimulation parameters (such as current intensity, vibration frequency and amplitude) based on the real-time analysis results of the changes in uterine pressure by the processing unit, thereby achieving an immediate response to each uterine contraction event. This precise control ensures that the stimulation signal is highly synchronized with the uterine contraction activity, enhancing the effectiveness of analgesia and breathing guidance. The system can automatically adjust the stimulation mode according to the specific circumstances of different pregnant women, providing each user with a personalized support plan, enhancing the adaptability of the system and user comfort. In addition, by closely monitoring the fetal heart rate and uterine pressure and adjusting the stimulation strategy in a timely manner, the system can protect the health of the fetus while ensuring the comfort of the mother, reducing the adverse effects caused by excessive tension or pain, such as complications such as fetal distress.

[0013] According to a preferred embodiment, the processing unit of the stimulation generator determines the slope and duration of the uterine pressure change at each time point by determining the characteristics of the uterine pressure change over time. When the uterine pressure change is detected to meet preset conditions, the processing unit generates a matching inspiration stimulation signal, expiration stimulation signal, pain relief stimulation signal, or analgesia stimulation signal to instruct the stimulation unit to set the stimulation parameters of the electrical stimulation module and / or massage stimulation module. The processing unit's built-in algorithm analyzes the uterine pressure data received from the communication unit, calculates the rising or falling slope of the uterine pressure at each time point, and records its duration. This high-precision data analysis ensures accurate capture of uterine pressure changes. Once the uterine pressure change reaches the preset conditions, the processing unit immediately generates the corresponding stimulation signal instruction. This enables the system to quickly respond to uterine contraction events and provide timely and effective breathing guidance and pain management. In addition, the processing unit dynamically adjusts the timing, intensity, and duration of the stimulation signal according to the different stages of uterine pressure change (such as the onset, peak, and end of a contraction). This flexibility ensures that the stimulation is both effective and safe, optimizing the childbirth experience.

[0014] According to a preferred embodiment, when the processing unit detects that the rising slope of uterine pressure has reached its preset starting slope, it generates a signal for generating an inhalation stimulation signal and sends it to the stimulation unit to induce inhalation. The processing unit uses a built-in algorithm to analyze the uterine pressure data received from the communication unit and calculate the rising slope of uterine pressure at each time point. This high-precision data analysis ensures accurate detection of the onset of uterine contractions.

[0015] According to a preferred embodiment, when the processing unit detects that the slope of the uterine pressure drop has reached its preset stop slope, the processing unit generates a signal for generating an exhalation stimulation signal and sends it to the stimulation unit to guide the exhalation action. The processing unit analyzes the uterine pressure data received from the communication unit through a built-in algorithm and calculates the slope of the uterine pressure drop at each time point. Once the slope of the uterine pressure drop reaches the preset stop slope, the processing unit immediately generates a signal for generating an exhalation stimulation signal. This enables the system to respond quickly in the early stages of uterine contractions and provide timely and effective breathing guidance.

[0016] According to a preferred embodiment, when the processing unit detects that the rising slope of uterine pressure exceeds the starting slope and the uterine pressure is greater than a pre-set first threshold, the processing unit can identify it as a uterine contraction start signal that requires pain relief support, generate a signal for generating a pain relief stimulation signal, and send it to the stimulation unit to relieve uterine contraction pain. The pain relief stimulation signal uses a significantly stronger stimulation amplitude or intensity to distract attention and reduce pain, and is suitable for situations where the uterine pressure is greater than the first threshold. This method helps to provide additional support during the peak of uterine contractions and helps pregnant women better cope with severe pain.

[0017] According to a preferred embodiment, when the processing unit detects that the uterine pressure is greater than a pre-set second threshold, the processing unit recognizes that this is a signal of a violent uterine contraction, generates a signal for generating an analgesic stimulation signal, and sends it to the stimulation unit to relieve the uterine contraction pain, wherein if the uterine pressure is greater than the second threshold and continues for more than a predetermined period of time, the processing unit generates a prompt instruction for reminding pharmacological analgesia, and sends it to the external display unit through the communication unit. If the uterine pressure is greater than the pre-set second threshold, it means that the pregnant woman is about to or is experiencing a situation where respiratory regulation and analgesic stimulation alone are not enough to fully relieve the pain. The step of the processing unit automatically generating a signal for generating an analgesic stimulation signal and sending it to the stimulation unit realizes the automation of analgesic measures, reduces manual intervention, and improves the efficiency and accuracy of pain management. In addition, the pharmacological analgesia prompt is intended to assist medical staff in taking timely and accurate medical intervention measures to ensure that pregnant women receive the necessary pharmacological analgesia support.

[0018] According to a preferred embodiment, inhalation stimulation is applied to pregnant women through gradually increasing stimulation amplitude and / or intensity to simulate the feeling of deep inhalation; exhalation stimulation is applied to pregnant women through gradually decreasing stimulation amplitude and / or intensity to guide them to perform soothing exhalation movements; pain-relieving stimulation uses a stronger stimulation amplitude or intensity than inhalation stimulation and exhalation stimulation to distract attention and relieve pain; analgesic stimulation further increases the stimulation amplitude or intensity on the basis of pain-relieving stimulation. The system of the present invention achieves effective intervention in the management of breathing and pain in pregnant women by selecting different types of stimulation modes. Inhalation stimulation and exhalation stimulation help guide pregnant women to perform correct breathing exercises and achieve relaxation and balance of body and mind; pain-relieving stimulation and analgesic stimulation provide pregnant women with a new method of pain management by distracting attention and activating pain relief mechanisms. These stimulation modes complement each other and together constitute a comprehensive and effective management system for pregnant women's breathing and pain.

[0019] According to a preferred embodiment, when generating the exhalation stimulation signal, the inhalation stimulation signal, the analgesia stimulation signal and the pain relief stimulation signal, the processing unit can obtain the fetal heart rate changes from the fetal heart monitor, and use it to generate or stop the corresponding stimulation and / or generate corresponding prompt information to the external display unit. The processing unit can obtain the fetal heart rate changes from the fetal heart monitor in real time. This real-time performance ensures that the generation or stopping of the stimulation signal can quickly respond to the changes in the fetal heart rate, thereby improving the accuracy and effectiveness of the stimulation. This is crucial for the safety of pregnant women and fetuses, because timely stimulation adjustments can avoid potential adverse effects.

[0020] According to a preferred embodiment, the processing unit can introduce a phased adjustment scheme for the stimulation unit according to the changes in the fetal heart rate. According to the specific changes in the fetal heart rate, the processing unit instructs the electrical stimulation module and / or massage stimulation module in the stimulation unit to adjust the corresponding stimulation parameters, so that the stimulation generator operates according to the adjustment scheme at different stages. This intelligent adjustment mechanism makes the application of the stimulation signal more personalized and customized, and can be flexibly adjusted according to the specific conditions of different pregnant women and fetuses. This helps to improve the pertinence and effectiveness of the stimulation while reducing unnecessary stimulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a usage scenario of the system for assisting pregnant women with natural childbirth provided by the present invention;

[0022] Figure 2 This is a hardware connection diagram of the system for assisting pregnant women with natural childbirth provided by the present invention;

[0023] Figure 3 This is an example block diagram of a system for assisting pregnant women with natural childbirth provided by the present invention;

[0024] Figure 4 This is a workflow diagram of the system for assisting pregnant women with natural childbirth provided by the present invention;

[0025] Figure 5 This is an example CST diagram of a pregnant woman entering the early stage of labor provided by the present invention;

[0026] Figure 6 This is an example CST diagram of a pregnant woman entering the active labor phase provided by the present invention;

[0027] Figure 7 This is an example of a CST diagram of a pregnant woman with fully dilated cervix provided by the present invention;

[0028] Figure 8 This is an example of a standard CST diagram from the beginning to the end of uterine contraction provided by the present invention.

[0029] Reference Signs List

[0030] 100: fetal heart monitor; 110: pressure probe; 200: stimulation generator; 210: communication unit; 220: processing unit; 230: stimulation unit; 231: electrical stimulation module; 232: massage stimulation module; 300: display unit. DETAILED DESCRIPTION

[0031] The following is a detailed description with reference to the accompanying drawings.

[0032] Example 1

[0033] The present invention relates to a system for assisting a pregnant woman in natural childbirth, which comprises a fetal heart monitor 100 and a stimulation generator 200.

[0034] like Figure 1 As shown, the fetal heart rate monitor 100 is a commonly used device in hospital delivery rooms. It monitors intrauterine pressure changes using a highly sensitive pressure probe 110. The probe is typically made of flexible silicone to ensure good biocompatibility and wearer comfort. It also features an adjustable adhesive or fixed strap, allowing medical staff to adjust the pressure probe 110 to the pregnant woman's body shape and abdominal contours, ensuring a snug fit and optimal signal acquisition quality. The fetal heart rate measurement range of the fetal heart rate monitor 100 is typically between 30 and 250 bpm, with an accuracy of ≤±1 bpm. This means that the fetal heart rate monitor 100 can accurately measure the fetal heart rate in beats per minute (bpm). The fetal heart rate monitor 100 can also measure uterine pressure at the same or at least similar sampling frequency, enabling accurate measurement of the slope of uterine pressure changes. The fetal heart rate monitor 100 not only captures uterine pressure fluctuations in real time but also provides instant analysis of the collected information and intuitively displays it to medical staff through a graphical interface, enabling timely identification of any potential risk factors.

[0035] Preferably, if Figure 2 As shown, the stimulation generator 200 integrates multiple components, including a communication unit 210, a processing unit 220, and a stimulation unit 230. The communication unit 210 is responsible for data exchange with the fetal heart monitor 100; the processing unit 220 is responsible for data analysis and instruction generation; and the stimulation unit 230 performs specific physical or electrical stimulation actions according to the instructions issued by the processing unit 220 to assist pregnant women in managing pain and breathing rhythm during labor.

[0036] The communication unit 210 acts as a bridge for signal transmission and is responsible for obtaining uterine pressure change signals from the fetal heart monitor 100. To ensure the reliability and accuracy of data transmission, it can be composed of one or more wireless communication modules (such as Bluetooth Low Energy BLE, Wi-Fi, Zigbee, etc.) and / or wired interfaces (such as USB, RS232 serial interface) to ensure the security, reliability and real-time performance of data transmission. The communication unit 210 establishes a two-way communication link with the fetal heart monitor 100 through a standard protocol. It not only receives uterine pressure change signals, but also can send control instructions to the fetal heart monitor 100, such as requesting a specific data update frequency or synchronization timestamp.

[0037] The processing unit 220 can be a high-performance processor that can be built based on a microcontroller (MCU), a digital signal processor (DSP) or an embedded computer system. It is equipped with sufficient memory (RAM / Flash) for running complex algorithms and has built-in high-speed computing capabilities to quickly analyze the changing characteristics of uterine pressure over time, including but not limited to rising slope, falling slope, peak detection, etc. The processing unit 220 determines the timing, intensity and duration of the stimulation signal according to preset rules, and generates corresponding signaling to control the working state of the stimulation unit 230. In addition, the processing unit 220 can also process other physiological parameters (such as fetal heart rate) from the fetal heart monitor 100 to further optimize the stimulation strategy.

[0038] like Figure 2 As shown, the stimulation unit 230 can be equipped with an electrical stimulation module 231 and a massage stimulation module 232, designed to provide pain management and breathing guidance support to pregnant women through these two non-invasive technologies. Both modules optimize analgesia during labor while ensuring safety and comfort based on real-time monitoring of intrauterine pressure changes. Specifically, the stimulation unit 230 has two functions: one is to guide correct breathing movements to relieve pain; the other is to use external force to relieve pain that reaches a certain level. During uterine contractions, the stimulation unit 230 can selectively provide specific transcutaneous electrical nerve stimulation (TENS) or massage stimulation signals to guide pregnant women to perform deep inhalation and slow exhalation breathing movements to combat pain. These stimulation signals are designed to help pregnant women establish effective breathing patterns and utilize breathing regulation techniques to reduce pain during labor. When uterine contraction pain reaches or exceeds a certain threshold (for example, a high NRS score), breathing regulation alone may not be sufficient to provide adequate pain relief. In these cases, the stimulation unit 230 will further intervene with electrical stimulation and mechanical massage stimulation to provide additional analgesic support.

[0039] Preferably, the inhalation action of the pregnant woman to combat pain is, for example, a deep inhalation, while the exhalation action is a slow exhalation. These two breathing patterns are based on the Lamaze breathing method. Midwives provide detailed guidance to pregnant women during their hospitalization before delivery to ensure that they can correctly perform these actions after the stimulation unit 230 provides the corresponding stimulation.

[0040] Preferably, the electrical stimulation module 231 of the stimulation unit 230 adopts transcutaneous electrical nerve stimulation (TENS) technology, which applies current pulses within a safe range through one or more pairs of high-sensitivity electrode patches to help relieve pain during childbirth. This module can not only automatically adjust the current intensity and frequency during uterine contractions to adapt to the needs of different stages and provide the most appropriate pain relief and analgesia, but is also specially designed to guide pregnant women to perform correct breathing movements of deep inhalation and slow exhalation to enhance their own ability to fight pain. The electrode patches are made of disposable medical-grade flexible materials with good biocompatibility and conductivity, ensuring that they fit closely to the surface of the pregnant woman's skin without causing discomfort or allergic reactions. Preferably, each patch can also have a built-in microsensor for real-time monitoring of skin resistance changes, thereby optimizing current output parameters and improving the safety and effectiveness of stimulation. According to a study published by Piasecki et al. in the Scandinavian Journal of Pain in 2023, high-frequency, high-intensity TENS has been shown to be effective in pain management, especially in analgesia after gynecological surgery, which further verifies the scientific basis for the application of this module during childbirth.

[0041] To more effectively guide correct breathing, at the onset of a contraction, the electrical stimulation module 231 generates progressive current pulses, simulating the sensation of a deep inhalation and prompting the pregnant woman to inhale deeply and slowly. As uterine pressure decreases, the module emits gradually weakening current pulses, guiding the pregnant woman to exhale slowly. This breathing guidance mechanism helps pregnant women maintain a steady breathing rhythm, reduces tension during labor, and enhances their ability to self-regulate pain.

[0042] Preferably, if Figure 1 As shown, the massage stimulation module 232 of the stimulation unit 230 includes a small electric or pneumatic vibration device that can generate physical vibrations of different frequencies (such as 50 to 200 Hz) and amplitudes, simulating the techniques of professional masseuses, and effectively reducing the soreness in the lumbar and sacral regions and buttocks. The module supports multi-mode vibration settings and can be flexibly adjusted according to user needs to provide pregnant women with a personalized comfort experience. The vibration device is mounted on an adjustable support frame, allowing medical staff to adjust the position according to the body shape and preferences of the pregnant woman to ensure the best contact point and massage effect. In addition, the module housing is made of antibacterial material, which is easy to clean and disinfect to ensure sanitary conditions. The study published by Baxter et al. in "Frontiers in Pain Research" in 2023 pointed out that multimodal mechanical stimulation significantly reduced the pain scores of patients with acute and chronic lower back pain, which provides a theoretical basis and support for the use of this module during delivery.

[0043] In terms of breathing guidance during contractions, the massage stimulation module 232 concentrates lower frequency but stronger amplitude vibrations around the lumbar sacral region, and by increasing body sensory input, encourages pregnant women to take deeper inhalations, which not only relieves discomfort in the lumbar sacral region but also helps their waist and abdominal muscles work together to promote natural delivery; as uterine pressure drops, the massage stimulation module 232 switches to higher frequency but weaker amplitude vibrations, covering a wider area, helping to distract attention, making pregnant women feel more relaxed, and encouraging them to slowly complete the exhalation action.

[0044] Preferably, the two modules of stimulation unit 230 are connected to processing unit 220 via a high-speed internal bus or dedicated communication line, receiving precise control commands from processing unit 220 and executing specific stimulation tasks. This design not only improves the system's response speed and accuracy, but also ensures continuous and safe auxiliary support throughout the entire labor process.

[0045] Preferably, if Figure 2 、 Figure 3 As shown, the processing unit 220 of the stimulation generator 200 determines the slope and time of the uterine pressure change by determining the characteristics of the uterine pressure change over time. Specifically, the processing unit 220 first obtains the monitored uterine pressure data from the communication unit 210 through a high-speed internal bus or a dedicated communication line. The algorithm built into the processing unit 220 performs a detailed analysis of the uterine pressure changes, calculates the uterine pressure slope (increase or decrease, representing the severity of the uterine contraction change) at each time point, and records its duration. When it is detected that the uterine pressure rise slope exceeds the start slope (such as +3 to 5 mmHg / s, which can be adaptively set according to the clinical experience of medical staff), the processing unit 220 recognizes that this is a signal for the start of uterine contraction; conversely, when the uterine pressure drop slope exceeds the stop slope (such as -3 to 5 mmHg / s, which can be adaptively set according to the clinical experience of medical staff), it is regarded as a sign of the end of uterine contraction.

[0046] like Figure 4 As shown, once the uterine pressure rising slope reaches the starting slope, the processing unit 220 immediately generates a signal for generating an inhalation stimulation signal. This signal is transmitted via the internal bus to the electrical stimulation module 231 of the stimulation unit 230, instructing it to perform a progressively increasing current pulse output, and / or to the massage stimulation module 232 of the stimulation unit 230, instructing it to provide vibrations with a lower frequency (e.g., 50-80 Hz) but a stronger amplitude (e.g., 2-4 mm) concentrated around the lumbar sacral region, thereby simulating the sensation of deep inhalation to guide the pregnant woman to inhale to combat pain.

[0047] like Figure 4As shown, when the uterine pressure decrease slope reaches the stop slope, the processing unit 220 generates a signal for generating an exhalation stimulation signal. At this time, the electrical stimulation module 231 of the stimulation unit 230 is adjusted to output a gradually weakening current pulse according to the instruction, and / or the massage stimulation module 232 of the stimulation unit 230 is adjusted to vibrate at a higher frequency (e.g., 150-200 Hz) but a weaker amplitude (e.g., 0.5-1.5 mm) according to the instruction, instructing the pregnant woman to perform a soothing exhalation action.

[0048] Preferably, the inhalation stimulation and the exhalation stimulation are clearly different in form, ensuring that the pregnant woman can clearly distinguish them and be guided to the correct breathing rhythm.

[0049] Preferably, if Figure 4 As shown, when the processing unit 220 of the stimulation generator 200 detects that the rising slope of uterine pressure exceeds the starting slope and the uterine pressure is greater than a first threshold value (such as 70 mmHg), this means that the pregnant woman is about to or is experiencing a strong uterine contraction that is insufficient to fully relieve pain through respiratory regulation alone. The processing unit 220 can identify it as a uterine contraction start signal that requires pain relief support. Under the above conditions, the processing unit 220 immediately generates a signal for generating a pain relief stimulation signal. This signal is transmitted to the stimulation unit 230 via the internal bus, instructing it to perform mechanical massage stimulation and / or electrical stimulation that is significantly different from inhalation stimulation and exhalation stimulation to help distract attention and relieve the pain of the pregnant woman. After the pain relief stimulation has lasted for a preset period of time, only when the processing unit 220 determines that the falling slope of uterine pressure exceeds the stopping slope and the uterine pressure is less than the first threshold value, the processing unit 220 generates a signal for generating an exhalation stimulation signal to instruct the pregnant woman to perform a soothing exhalation action using the electrical stimulation module 231 and / or the massage stimulation module 232.

[0050] The determination of this preset duration needs to take into account the contraction cycle, physiological reaction time, safety and comfort. Under normal circumstances, the duration of a contraction is 60 to 90 seconds. Therefore, pain-relieving stimulation should provide sufficient support during the peak of the contraction. Taking into account the human body's perception and adaptation time to stimulation, it usually takes a few seconds to establish an effective analgesic effect. Continuous stimulation for too long may cause discomfort or over-dependence, while stimulation that is too short may not be enough to effectively relieve pain. Taking all the above factors into consideration, a reasonable "preset duration" can be set to 30 to 60 seconds. This time period can ensure sufficient pain relief support during the peak of the contraction without causing unnecessary prolonged stimulation, thereby ensuring the safety of the system and the comfort of pregnant women.

[0051] Preferably, if Figure 4As shown, when the processing unit 220 of the stimulation generator 200 detects that the uterine pressure is greater than a second threshold (e.g., 100 mmHg), the processing unit 220 identifies this as a sign of intense uterine contractions, indicating that the pregnant woman is about to or is currently experiencing pain relief that is insufficient with respiratory regulation and analgesic stimulation alone. Under these conditions, the processing unit 220 immediately generates a signal for generating an analgesic stimulation signal. This signal is transmitted via the internal bus to the stimulation unit 230, instructing it to perform high-intensity electrical stimulation or mechanical massage to provide additional analgesic assistance to the pregnant woman. Furthermore, the processing unit 220 continues to monitor changes in uterine pressure. When it determines that the current uterine pressure of the pregnant woman is greater than the second threshold for a period exceeding a predetermined time (e.g., 60 to 90 seconds, the specific value should be adjusted based on clinical experience and individual differences), the processing unit 220 generates a prompt for prompting pharmacological analgesia. This prompt is transmitted via the communication unit 210 to the external display unit 300, preferably to the fetal heart monitor 100 used to provide the uterine pressure, to display a pharmacological analgesia prompt associated with the prolonged uterine pressure exceeding the limit. This reminder is intended to assist medical staff in taking timely and accurate medical interventions to ensure that pregnant women receive the necessary drug analgesia support.

[0052] Preferably, inhalation stimulation is applied to pregnant women at gradually increasing stimulation amplitude and / or intensity to simulate the sensation of deep inhalation, while exhalation stimulation is applied to pregnant women at gradually decreasing stimulation amplitude and / or intensity to guide them to perform a soothing exhalation. Furthermore, compared to inhalation and exhalation stimulation, pain-relieving stimulation uses a significantly stronger stimulation amplitude or intensity to distract attention and reduce pain, while analgesic stimulation further increases stimulation intensity to provide a more significant analgesic effect.

[0053] Specifically, for the electrical stimulation module 231, when the rising slope of uterine pressure exceeds the starting slope, the processing unit 220 generates a signal for generating an inhalation stimulation signal. The signal can be sent to the electrical stimulation module 231 to instruct the electrode patch to emit a gradually increasing current pulse. The initial current intensity can be set to 1mA and linearly increase to about 3mA within a few seconds to help pregnant women concentrate and prepare for the next exhalation action. Conversely, when the falling slope of uterine pressure exceeds the stopping slope, the processing unit 220 generates a signal for generating an exhalation stimulation signal, instructing the electrode patch to emit a gradually weakening current pulse, gradually decreasing from 3mA back to 1mA, simulating the process of slow exhalation, and guiding pregnant women to relax their abdominal muscles and slowly expel air.

[0054] When the uterine pressure rise slope exceeds the starting slope and the uterine pressure is greater than a first threshold, the processing unit 220 generates a signal for generating a pain relief stimulation signal. This signal can be sent to the electrical stimulation module 231 to instruct the electrode patch to apply a medium-intensity current pulse, such as 4 to 6 mA, for a duration of 30 to 60 seconds. This higher current intensity is suitable for pregnant women who are about to or are experiencing stronger uterine contractions. It can effectively distract the pregnant woman and relieve pain without causing excessive discomfort.

[0055] When uterine pressure exceeds the second threshold, processing unit 220 generates a signal for generating an analgesic stimulation signal. This signal is sent to electrical stimulation module 231, instructing the electrode patch to apply a higher-intensity current pulse, such as 8-12 mA, to provide a more significant analgesic effect. This high-intensity current pulse can provide additional support to pregnant women during intense uterine contractions, ensuring their comfort and safety.

[0056] Regarding the massage stimulation module 232, when the slope of the uterine pressure increase exceeds the activation slope, the processing unit 220 generates a signal for generating an inhalation stimulation signal. This signal can be sent to the massage stimulation module 232 to instruct the small vibration device to provide a lower frequency but stronger amplitude vibration, concentrated around the lumbar sacral area, to increase body sensory input and encourage the pregnant woman to take a deeper inhalation. Specific parameters can be set to a vibration frequency of 60Hz and an amplitude of approximately 3mm, ensuring that the vibration intensity is strong enough to attract the pregnant woman's attention and promote deep inhalation, but not excessively stimulating.

[0057] When the uterine pressure rise slope exceeds the start slope and the uterine pressure is greater than a first threshold, the processing unit 220 generates a signal for generating a pain relief stimulation signal. This signal can be sent to the massage stimulation module 232 to instruct the small vibration device to switch to a higher frequency but weaker amplitude vibration mode, covering a wider area, helping pregnant women feel more relaxed, and encouraging them to exhale slowly. Specific parameters can be set to a vibration frequency of 180Hz and an amplitude of approximately 1mm, ensuring that the vibration is gentle and does not interfere with the pregnant woman's relaxation state, while still providing sufficient tactile feedback to relieve uterine contraction pain.

[0058] When uterine pressure exceeds the second threshold, processing unit 220 generates a signal for generating an analgesic stimulation signal. This signal is sent to massage stimulation module 232, instructing the small vibration device to provide higher-frequency but stronger-amplitude vibrations for a more significant analgesic effect. The specific parameters can be set to a vibration frequency of 150Hz and an amplitude of approximately 4mm. This high-intensity vibration provides additional support to pregnant women during intense uterine contractions, ensuring their comfort and safety.

[0059] In summary, by combining electrical stimulation and mechanical massage, the stimulation generator 200 can provide scientifically effective breathing guidance and support for pregnant women at different stages of labor. Inspiratory stimulation and expiratory stimulation simulate the sensations of deep inhalation and slow exhalation, respectively, helping pregnant women maintain a steady breathing rhythm. Pain relief stimulation and analgesic stimulation provide additional pain management support when necessary, ensuring the comfort and safety of pregnant women throughout labor.

[0060] Preferably, if Figure 3 As shown, when generating the exhalation stimulation signal, the inhalation stimulation signal, the analgesia stimulation signal and the pain relief stimulation signal, the processing unit 220 also obtains the fetal heart rate change from the fetal heart monitor 100, and uses it to generate or stop the corresponding stimulation and / or generate the corresponding prompt information to the external display unit 300. The change in fetal heart rate is one of the important indicators for assessing the health status of the fetus. It directly reflects the reaction and adaptability of the fetus in the intrauterine environment. Changes in fetal heart rate can reflect whether the fetus is in a state of stress or is at risk of hypoxia. For example, when the fetal heart rate continues to rise abnormally or decelerates abnormally, this may be a signal that the fetus is under pressure or is not getting enough oxygen. At this time, if the intensity of the electrical stimulation or mechanical massage is insufficient, the pregnant woman's uterine contractions may not be effectively relieved, thereby indirectly affecting uterine blood flow and causing insufficient oxygen supply to the fetus.

[0061] Preferably, in order to manage pain more precisely and ensure the safety and comfort of mother and baby, the processing unit 220 can introduce a phased adjustment scheme for the stimulation unit 230 according to the changes in the fetal heart rate. According to the changes in the fetal heart rate, the adjustment scheme can be set to include three stages.

[0062] When the fetal heart rate begins to rise slightly (e.g., exceeding 140 bpm but not reaching 160 bpm), in response to the uterine cavity pressure and fetal heart rate change signals sent by the fetal heart monitor 100 to the communication unit 210, the processing unit 220 can instruct the electrical stimulation module 231 and / or the massage stimulation module 232 of the stimulation unit 230 to set corresponding stimulation parameters so that the stimulation generator 200 adopts the first stage adjustment scheme. When the fetal heart rate rises further (e.g., exceeding 160 bpm), in response to the uterine cavity pressure and fetal heart rate change signals sent by the fetal heart monitor 100 to the communication unit 210, the processing unit 220 can instruct the electrical stimulation module 231 and / or the massage stimulation module 232 of the stimulation unit 230 to set corresponding stimulation parameters so that the stimulation generator 200 adopts the second stage adjustment scheme. When the fetal heart rate is at a high level for a long time (such as exceeding 160 bpm for more than 3 minutes), in response to the uterine cavity pressure and fetal heart rate change signals sent by the fetal heart monitor 100 to the communication unit 210, the processing unit 220 can, on the one hand, instruct the electrical stimulation module 231 and / or massage stimulation module 232 of the stimulation unit 230 to set corresponding stimulation parameters so that the stimulation generator 200 adopts the third stage adjustment scheme, and on the other hand, instruct the communication unit 210 to send a drug analgesia prompt to the external display unit 300 or the fetal heart monitor 100 to display a drug analgesia prompt related to the excessive uterine pressure that lasts too long. This prompt is intended to assist medical staff in taking accurate medical intervention measures in a timely manner to ensure that pregnant women receive the necessary drug analgesia support. At this time, the stimulation parameters of the electrical stimulation module 231 and / or massage stimulation module 232 can be restored to the level of the first stage to reduce additional stimulation to the pregnant woman.

[0063] Preferably, in the first phase of the adjustment scheme, the current intensity of the electrical stimulation module 231 for both the inhalation and exhalation stimulation signals still varies linearly within a range of 1 to 3 mA, but by slightly accelerating the rate of linear increase and decrease, the pregnant woman can be guided to inhale and exhale more quickly. Simultaneously, the vibration frequency of the massage stimulation module 232 is slightly increased to approximately 70 Hz, while the amplitude is maintained at 3 mm, ensuring that the vibration intensity is noticeable enough to attract the pregnant woman's attention and promote deep inhalation, but not excessively stimulating.

[0064] For the pain relief stimulation signal, the current intensity of the electrical stimulation module 231 is fine-tuned to near the upper limit (e.g., 5-6 mA) to enhance the distraction effect; and the amplitude of the massage stimulation module 232 is slightly increased to about 1.2 mm to enhance the gentle massage feeling and further relieve pain.

[0065] In response to the analgesic stimulation signal, the electrical stimulation module 231 applies a medium-intensity current pulse (for example, 4 to 6 mA) for a duration of 30 to 60 seconds. This higher current intensity is suitable for pregnant women who are about to or are experiencing stronger uterine contractions. It can effectively distract the pregnant woman's attention and relieve pain without causing excessive discomfort. At the same time, the massage stimulation module 232 switches to a higher frequency but weaker amplitude vibration mode (for example, a vibration frequency of 180 Hz and an amplitude of approximately 1 mm), covering a wider area, helping pregnant women feel more relaxed, and encouraging them to slowly complete the exhalation action, while providing sufficient tactile feedback to relieve uterine contraction pain.

[0066] Preferably, in the adjustment scheme of the second stage, the current intensity of the electrical stimulation module 231 still varies linearly within the range of 1 to 3 mA for the inhalation stimulation signal and the exhalation stimulation signal, but the speed of linear increase and decrease is further accelerated compared to the first stage. This faster change can more efficiently guide pregnant women to inhale and exhale. At the same time, the vibration frequency of the massage stimulation module 232 is increased to about 80 Hz, and the amplitude is maintained at 3.5 mm, making the vibration more obvious to attract the attention of pregnant women and promote deep breathing.

[0067] For the pain relief stimulation signal, the current intensity of the electrical stimulation module 231 is increased to the upper limit set by the processing unit 220 (for example, 6 mA), and the duration is extended to nearly 60 seconds to enhance the distraction effect; the frequency of the massage stimulation module 232 is increased to close to the upper limit set by the processing unit 220 (for example, 180 Hz), while maintaining the amplitude at 1 mm, thereby enhancing the relief effect and providing stronger analgesic support.

[0068] For analgesic stimulation signals, the electrical stimulation module 231 starts with a lower intensity (e.g., 8 mA) and gradually adjusts to a higher intensity (e.g., 10-12 mA) as needed to accommodate the changing intensity of uterine contractions. The massage stimulation module 232 uses a higher amplitude (e.g., 4 mm) to provide stronger support, ensuring effective pain relief during strong contractions while avoiding overstimulation.

[0069] Preferably, in the adjustment scheme of the third stage, the processing unit 220 adjusts the stimulation parameters of the electrical stimulation module 231 and the massage stimulation module 232 to the same settings as the first stage. This adjustment is intended to reduce additional stimulation to pregnant women and avoid potential risks, ensuring that the parameters of all stimulation signals return to the milder first-stage configuration. In addition, the processing unit 220 instructs the communication unit 210 to send a pharmacological analgesia prompt to the external display unit 300 or the fetal heart monitor 100 so that medical staff can intervene in time and take necessary medical intervention measures. This dual protection mechanism not only ensures the effectiveness and safety of the analgesia strategy, but also can respond quickly when the fetal heart rate is abnormal, giving priority to protecting the health of the fetus.

[0070] Example 2

[0071] This embodiment is a further supplement to the above embodiments, and repeated contents will not be repeated here.

[0072] This example combines the contraction stress test (CST) Figures 5 to 8 , the operating mechanism of the system of the present invention and the specific response plan of the stimulation generator 200 under different uterine contraction states are exemplified.

[0073] In the pregnant woman's uterine contraction stimulation generator 200 of the present embodiment, based on the monitoring of the pregnant woman's uterine contraction state, the mathematical model pre-stored in the processing unit 220 is used to provide relevant electrical stimulation parameters (electrical stimulation intensity) or physical massage parameters (vibration frequency and vibration amplitude) for achieving effective stimulation, thereby improving the comfort and safety of the pregnant woman.

[0074] like Figure 5 As shown in the figure, the curve of fetal heart rate change over time (upper curve) and the curve of uterine pressure change over time (lower curve) during CST are depicted. For the curve of uterine pressure change, the horizontal axis represents time, and each small grid corresponds to 10 seconds; the vertical axis represents uterine pressure, and each small grid corresponds to 10 mmHg. Each segment of uterine pressure increase that lasts for more than 20 seconds in the figure represents a uterine contraction event. For example, Figure 5 Four distinct uterine contractions were observed. During the first contraction, uterine pressure increased rapidly from approximately 30 mmHg to nearly 65 mmHg over a period of approximately 10 seconds, indicating a significant peak contraction with an upward slope of 3.5 mmHg / s. This was followed by a sudden decrease in pressure over a period of approximately 30 seconds.

[0075] When the processing unit 220 detects that the rate of increase of uterine pressure within a certain period of time exceeds the preset starting slope, it is determined that uterine contraction has begun, and triggers the corresponding inhalation stimulation signal to be sent to the electrical stimulation module 231 or massage stimulation module 232 of the stimulation unit 230, simulating deep breathing movements to help pregnant women relieve the discomfort caused by uterine contractions.

[0076] If the stimulation unit 230 instructs the electrical stimulation module 231 to provide breathing guidance support for the pregnant woman, the electrical stimulation module 231 will increase the stimulation intensity I during the inspiration phase. i The calculation formula for (t) (the calculation formula may be a pre-stored mathematical model or a part of the mathematical model) is:

[0077]

[0078] Where, I min (Unit: A) refers to the initial stimulus intensity, I max (Unit: A) refers to the maximum stimulation intensity. Both parameters can be set by the stimulation unit 230. The set value can be determined by the medical staff within the range of electrical stimulation recommended for pregnant women. R(P) refers to the response adjustment coefficient, which is calculated based on the uterine pressure P. The specific form is:

[0079] R(P)=k r H(P-T1)

[0080] k r The gain coefficient (unit: A / mmHg) is the gain factor associated with changes in uterine pressure, reflecting the sensitivity of uterine pressure changes to stimulus intensity. This coefficient can be obtained by analyzing historical maternal data stored in the hospital's electronic health record system, which includes uterine pressure measurements and their corresponding stimulus intensity responses, and is determined by relevant experts.

[0081] H is a step function that is 1 when P>T1 and 0 otherwise. T1 (unit: mmHg) refers to the first threshold of uterine pressure, which can be determined based on clinical experience. W(P'): Slope weight function, which represents the influence of the rate of change of uterine pressure, specifically:

[0082]

[0083] P' (unit: mmHg / s) refers to the rate of change of uterine pressure, which can be obtained through real-time monitoring, and α (dimensionless) refers to the adjustment coefficient, which can be determined by clinical trials, for example. s (Unit: mmHg) is the reference value of the slope, which can be set based on clinical data, for example. i(unit: s) is the reference time associated with inspiration, which can be dynamically adjusted according to the patient's response within the numerical range given in relevant medical guidelines. t (unit: s) refers to the current time and changes as the stimulation progresses. t s (Unit: s) refers to the time when the stimulus starts.

[0084] If the stimulation unit 230 instructs the massage stimulation module 232 to provide breathing guidance support for the pregnant woman, the calculation formula of the vibration frequency and vibration amplitude of the massage stimulation module 232 during the inspiration phase (the calculation formula can be a pre-stored mathematical model or a part of the mathematical model) is:

[0085] f i (t) = f i0 +k i ·R(P)

[0086]

[0087] Where, f i0 (Unit: Hz) is the initial vibration frequency of the inspiratory stimulus; A i0 (Unit: mm) refers to the initial amplitude of the inspiratory stimulus. Both can be determined by medical staff within the clinically recommended range. i (Unit: Hz / A) is the frequency increment coefficient related to uterine pressure, which can be determined by clinical trials and can be dynamically adjusted based on patient feedback.

[0088] See also Figure 6 This figure shows the occurrence of seven uterine contractions. In particular, near the peak of the fourth contraction, the rate of uterine pressure drop is approximately 3 mmHg / s. Once the processing unit 220 calculates that the rate of uterine pressure drop within a certain time period exceeds the set stop slope, the contraction is considered to have ended and an exhalation stimulation signal is generated and transmitted to the stimulation unit 230, instructing the pregnant woman to perform a relaxing exhalation action to help reduce the body tension after the contraction.

[0089] If the stimulation unit 230 instructs the electrical stimulation module 231 to provide breathing guidance support for the pregnant woman, the electrical stimulation module 231 will increase the stimulation intensity I during the exhalation phase. e The calculation formula for (t) (the calculation formula may be a pre-stored mathematical model or a part of the mathematical model) is:

[0090]

[0091] The parameters in the formula are related to the stimulation intensity I in the aforementioned inspiratory phase. i The meanings of the parameters in the calculation formula of (t) remain consistent, where T eIt is a time parameter related to exhalation, which can also be dynamically adjusted according to the patient's response within the numerical range given in the relevant medical guidelines.

[0092] If the stimulation unit 230 instructs the massage stimulation module 232 to provide breathing guidance support for the pregnant woman, the vibration frequency and amplitude calculation formula during the exhalation phase (the calculation formula may be a pre-stored mathematical model or a part of the mathematical model) is:

[0093] f e (t) = f e0 -k e ·R(P)

[0094]

[0095] Where, f e0 (Unit: Hz) refers to the initial vibration frequency of the exhalation stimulus, A e0 (Unit: mm) refers to the initial amplitude of the exhalation stimulus. Both can be determined by medical staff within the clinically recommended range. e (Unit: Hz / A) is the frequency reduction coefficient related to uterine pressure, which is determined by clinical trials and can be dynamically adjusted based on patient feedback.

[0096] like Figure 7 As shown, seven uterine contractions were also recorded. The third contraction was characterized by a uterine pressure rise rate of 4 mmHg / s and a peak value of nearly 100 mmHg. When the processing unit 220 determines that the uterine pressure rise rate within a certain period exceeds the starting slope and the peak uterine pressure exceeds a predefined first threshold, it generates a pain relief stimulation signal and transmits it to the stimulation unit 230 via the internal communication bus, instructing it to implement mechanical massage or electrical stimulation, different from conventional inhalation and exhalation guidance, to distract attention and relieve pain.

[0097] Specifically, if the stimulation unit 230 instructs the electrical stimulation module 231 to provide pain management for the pregnant woman, the electrical stimulation intensity I of the pain relief stimulation is r (t) The calculation formula (the calculation formula may be a pre-stored mathematical model or a part of the mathematical model) is as follows:

[0098]

[0099] Where, I b (Unit: A) refers to the baseline intensity of pain relief stimulation, I h (Unit: A) refers to the maximum intensity of pain relief stimulation. Both are determined by medical staff based on clinical recommended values.

[0100] C(P) is the comfort correction factor, which is calculated based on the uterine pressure P and is in the form of:

[0101]

[0102] Among them, T1 (unit: mmHg) refers to the first threshold of uterine pressure, which is determined based on clinical experience. h (Unit: mmHg) refers to the highest threshold of uterine pressure, which determines the safe upper limit of uterine pressure to avoid discomfort or complications that may be caused by exceeding this threshold. It is set based on clinical historical data.

[0103] D r (Unit: s) refers to the duration of pain relief stimulation, which is actually measured based on the patient's response.

[0104] C d (D r ,tt s ) is a time-based regulation function that represents the change of stimulus intensity over time. The specific form is as follows:

[0105]

[0106] Where D r (Unit: s) refers to the duration of pain relief stimulation, which can be set as the maximum duration of the stimulation effect. s (Unit: s) refers to the time since the start of stimulation and is used to provide a time reference for dynamic changes.

[0107] When tt s <0, indicating that the stimulation has not yet started, the function value is 0, indicating that there should be no pain relief effect at this time; when 0≤tt s <D r When , the function value increases linearly from 0 to 1, indicating that the effect of the stimulus gradually increases until it reaches the set maximum duration D r ; When tt s ≥D r When , the function value is 1, indicating that the pain relief stimulation has reached its maximum effect and can continue until the end.

[0108] If the stimulation unit 230 instructs the massage stimulation module 232 to provide pain management for the pregnant woman, the calculation formula for the vibration frequency and vibration amplitude of the pain relief stimulation (the calculation formula may be a pre-stored mathematical model or a part of the mathematical model) is as follows:

[0109] f r (t) = f r0 +k r ·R(P)

[0110]

[0111] Where, f r0(Unit: Hz) refers to the initial vibration frequency of the pain relief stimulus, A r0 (Unit: mm) refers to the initial amplitude of the pain relief stimulus. Both can be determined by medical staff within the clinically recommended range. r (Unit: Hz / A) refers to the frequency increment coefficient related to uterine pressure, which needs to be set through clinical trials and dynamically adjusted based on patient feedback.

[0112] Figure 8 A complete uterine contraction cycle is presented, from start to finish. During this process, the rate of increase of uterine pressure is 4.5 mmHg / s, and the peak value exceeds 100 mmHg. If the processing unit 220 finds that the rate of increase of uterine pressure within a certain period exceeds the starting slope, and the peak uterine pressure exceeds the more stringent second threshold, it is considered a severe uterine contraction event. At this time, the processing unit 220 will send an analgesic stimulation signal, which is transmitted to the stimulation unit 230 via the internal communication bus, prompting it to perform high-intensity electrical stimulation or mechanical massage operations to provide additional analgesic support and ensure that the pregnant woman can get effective relief.

[0113] Specifically, if the stimulation unit 230 instructs the electrical stimulation module 231 to provide pain management for the pregnant woman, the electrical stimulation intensity I of the analgesic stimulation is a The calculation formula for (t) (the calculation formula may be a pre-stored mathematical model or a part of the mathematical model) is as follows:

[0114]

[0115] Where, I l (Unit: A): Baseline intensity of analgesic stimulation, I p (Unit: A): The highest intensity of analgesic stimulation, both of which are determined by medical staff based on clinical recommended values. a (Unit: s): Duration of analgesic stimulation, measured based on the patient's actual response.

[0116] If the stimulation unit 230 instructs the massage stimulation module 232 to provide pain management for the pregnant woman, the calculation formula for the vibration frequency and vibration amplitude of the analgesic stimulation (the calculation formula may be a pre-stored mathematical model or a part of the mathematical model) is as follows:

[0117] f a (t) = f a0 +k a ·R(P)

[0118]

[0119] Where, f a0 (Unit: Hz) refers to the initial vibration frequency of the analgesic stimulus, A a0(Unit: mm) refers to the initial amplitude of the analgesic stimulus. Both can be determined by medical staff within the clinically recommended range. a (Unit: Hz / A) refers to the frequency increment coefficient related to uterine pressure, which needs to be set through clinical trials and dynamically adjusted based on patient feedback.

[0120] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the protection scope of the present invention. Those skilled in the art should understand that the present invention specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. The present invention specification contains multiple inventive concepts, such as "preferably" or "according to a preferred embodiment", which means that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application based on each inventive concept. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set, so the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A system for assisting pregnant women in natural childbirth, characterized in that: include: A fetal heart monitor (100) is used to monitor changes in uterine cavity pressure during childbirth by means of a pressure probe (110) placed on the abdominal wall of a pregnant woman; A stimulation generator (200) that provides a stimulation signal corresponding to the change in uterine cavity pressure provided by the fetal heart monitor (100); The stimulation generator (200) has a communication unit (210), and the communication unit (210) is used to obtain a uterine cavity pressure change signal related to the corresponding pregnant woman from the fetal heart monitor (100), and provide the uterine cavity pressure change signal to the processing unit (220) of the stimulation generator (200). The processing unit (220) of the stimulation generator (200) determines the timing, intensity and duration of an inspiration stimulation signal, an expiration stimulation signal, analgesia stimulation signal or analgesia stimulation signal by analyzing changes in uterine cavity pressure. The stimulation generator (200) includes a stimulation unit (230) that is communicatively connected to the processing unit (220) and guides correct breathing movements and utilizes external force to relieve pain. The stimulation unit (230) performs specific stimulation movements according to instructions issued by the processing unit (220) to assist pregnant women in managing pain and breathing rhythm during childbirth, wherein: The stimulation unit (230) is capable of applying current stimulation with different pulse intensities by means of the electrical stimulation module (231), and applying physical vibration stimulation with different frequencies and amplitudes by means of the massage stimulation module (232), and the processing unit (220) of the stimulation generator (200) determines the slope and duration of the uterine pressure change at each time point by determining the characteristics of the uterine pressure change over time. When it is detected that the uterine pressure change meets a preset condition, the processing unit (220) generates one of the matching inhalation stimulation signal, exhalation stimulation signal, pain relief stimulation signal or analgesia stimulation signal to instruct the stimulation unit (230) to set the stimulation parameters of the electrical stimulation module (231) and the massage stimulation module (232).

2. The system according to claim 1, wherein: When the processing unit (220) detects that the uterine pressure rising slope reaches its preset starting slope, the processing unit (220) generates a signal for generating the inhalation stimulation signal and sends it to the stimulation unit (230) to guide the inhalation action.

3. The system according to claim 1, wherein: When the processing unit (220) detects that the uterine pressure drop slope reaches its preset stop slope, the processing unit (220) generates a signal for generating the exhalation stimulation signal and sends it to the stimulation unit (230) to guide the exhalation action.

4. The system according to claim 1, wherein: When the processing unit (220) detects that the rising slope of uterine pressure exceeds the starting slope and the uterine pressure is greater than a preset first threshold, the processing unit (220) can identify it as a uterine contraction start signal requiring pain relief support, generate a signal for generating the pain relief stimulation signal, and send it to the stimulation unit (230) to relieve uterine contraction pain.

5. The system according to claim 1, wherein: When the processing unit (220) detects that the uterine pressure is greater than a preset second threshold, the processing unit (220) identifies that this is a signal of a severe uterine contraction, generates a signal for generating the analgesic stimulation signal, and sends it to the stimulation unit (230) to relieve the uterine contraction pain, wherein: If the uterine pressure is greater than the second threshold value for a period exceeding a predetermined time, the processing unit (220) generates a prompt instruction for prompting drug analgesia and sends it to the external display unit (300) via the communication unit (210).

6. The system according to claim 1, wherein: Inspiratory stimulation is applied to pregnant women by gradually increasing the amplitude and / or intensity of stimulation to simulate the feeling of deep inspiration; Exhalation stimulation is applied to pregnant women through gradually decreasing stimulation amplitude and / or intensity to guide them to perform soothing exhalation movements; Analgesic stimulation uses a stronger stimulation amplitude or intensity than inhalation stimulation and exhalation stimulation to distract attention and reduce pain sensation; Analgesic stimulation further increases the stimulation amplitude or intensity based on pain-relieving stimulation.

7. The system according to claim 1, wherein: When generating an exhalation stimulation signal, an inhalation stimulation signal, an analgesia stimulation signal, and an analgesia stimulation signal, the processing unit (220) can obtain fetal heart rate changes from the fetal heart monitor (100), and use them to generate or stop corresponding stimulation and / or generate corresponding prompt information to the external display unit (300).

8. The system according to claim 7, characterized in that The processing unit (220) can introduce a phased adjustment scheme for the stimulation unit (230) according to the change of the fetal heart rate. According to the specific change of the fetal heart rate, the processing unit (220) instructs the electrical stimulation module (231) and the massage stimulation module (232) in the stimulation unit (230) to adjust the corresponding stimulation parameters, so that the stimulation generator (200) operates according to the adjustment scheme at different stages.

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