Multi-channel surface electromyogram signal acquisition system for spinal rehabilitation monitoring

Abstract

The invention relates to a multichannel surface electromyogram signal acquisition system for spinal rehabilitation monitoring. The multichannel surface electromyogram signal acquisition system comprises a waistband, an electrode box and a data transmitter, the electrode box is provided with a plurality of erector spinalis electrodes, and the erector spinalis electrodes are arranged on the two sides of the central axis, corresponding to the spine of a patient, of the electrode box respectively; one surface, provided with the erector spinalis electrodes, of the electrode box is coplanar with the inner side surface of the waistband and is used for being attached to erector spinalis of a patient to be detected, the erector spinalis electrodes synchronously collect electromyographic signals corresponding to the erector spinalis of the patient to be detected, and the data transmitter sends the electromyographic signals collected by the erector spinalis electrodes to an upper computer. According to the invention, the corresponding muscle myoelectricity during rehabilitation training can be simply and conveniently detected, and the rehabilitation process and the rehabilitation degree can be accurately and quantitatively recorded and evaluated.

Description

Technical Field

[0001] The invention belongs to the field of medical equipment, and in particular relates to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring. Background Art

[0002] When patients have spinal joint diseases or after surgery, they need to cooperate with appropriate rehabilitation training to speed up the recovery of spinal function. During the rehabilitation training process, strength training of the muscles around the spine is usually carried out. For example, isometric contraction combined with isotonic contraction can be used to contract the muscles around the spine to increase strength. By detecting the corresponding muscle electromyography during rehabilitation training, the rehabilitation process can be quantitatively recorded and the degree of rehabilitation can be evaluated.

[0003] In current spinal rehabilitation assessment, visual assessment of the subject's body surface characteristics is the main method, which has low accuracy. In addition, in the early stages of some diseases, the body surface characteristics are not obvious and pathological problems cannot be discovered in time. Although medical imaging assessment can provide high-precision bone information, medical imaging has the problems of radiation, time-consuming process, multiple site requirements, and high economic cost, and is not suitable for long-term daily spinal health monitoring and high-frequency treatment effect tracking. Summary of the invention

[0004] In view of the above deficiencies in the prior art, an object of the invention is to provide a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring.

[0005] The present invention provides a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring, comprising:

[0006] Belt, electrode box, data transmitter;

[0007] The electrode box and the data transmitter are both mounted on the waist belt, and the electrode box is provided with a plurality of erector spinae electrodes, which are arranged on both sides of the central axis of the electrode box corresponding to the patient's spine;

[0008] The electrode box is provided with an erector spinae electrode on one side which is coplanar with the inner side of the waist belt and is used to fit the erector spinae of the patient to be tested. The multiple erector spinae electrodes synchronously collect electromyographic signals corresponding to the erector spinae of the patient to be tested. The data transmitter sends the electromyographic signals collected by the erector spinae electrodes to the host computer to complete the electromyographic signal collection of the patient to be tested.

[0009] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the surface of the electrode box is a spine-shaped shell, the side of the electrode box provided with erector spinae electrodes is a monitoring surface, and a positioning protrusion is provided on the monitoring surface. The positioning protrusion corresponds to the spinal position of a patient to be tested, and is used for fitting and positioning with the concave back spine of the patient to be tested.

[0010] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, an acquisition board is also provided in the electrode box, and an acquisition circuit is arranged on the acquisition board. The acquisition circuit is respectively connected to a plurality of erector spinae electrodes to acquire the electromyography signals of the plurality of erector spinae electrodes and perform filtering and noise reduction.

[0011] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the acquisition board is electrically connected to the data transmitter via a wire, and the acquisition board converts the electromyography signal after filtering and noise reduction into a digital signal and transmits it to the data transmitter.

[0012] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the data transmitter comprises:

[0013] Receiving module, sending module, storage module;

[0014] The receiving module is used to perform AD sampling on the electrode box to obtain a converted digital signal. The sending module sends the digital signal to a host computer via Bluetooth and synchronously stores the digital signal in the FLASH of the storage module.

[0015] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the data transmitter also includes:

[0016] Battery, switch, charging port;

[0017] The switch controls the battery, the battery receives the switching signal of the switch and synchronously supplies power to the electrode box and the data transmitter, and the charging interface is used to charge the battery with an external power source.

[0018] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the data transmitter also includes:

[0019] Zero potential electrode;

[0020] The zero potential electrode is used to provide a potential reference for a plurality of erector spinae electrodes.

[0021] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the waist belt is a flexible waist belt made of elastic material, and the waist belt is also provided with elastic buckles for connecting two ends of the waist belt.

[0022] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the host computer is used to analyze the electromyography signal sent by the data transmitter, obtain analysis data, and synchronously visualize the analysis data in combination with patient information.

[0023] According to a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by the present invention, the analysis data includes a muscle force curve corresponding to the monitored electromyography signal and a muscle force average value curve within a preset time, and the patient information includes at least a muscle force threshold.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention provides a multi-channel surface electromyographic signal acquisition system for spinal rehabilitation monitoring. A plurality of erector spinae electrodes are arranged on both sides of the central axis corresponding to the patient's spine on an electrode box, thereby realizing multi-channel synchronous acquisition of electromyographic signals, which is helpful for comprehensively evaluating the functional status of the patient's erector spinae muscles and providing more comprehensive data support for spinal rehabilitation. By designing a spine-like outer shell and positioning protrusions, it can accurately fit the back spine of the patient to be tested, ensuring that a plurality of erector spinae electrodes accurately acquire electromyographic signals corresponding to the patient's spine, which not only improves the acquisition accuracy, but also helps to reduce signal errors caused by improper electrode position. The acquisition circuit arranged in the electrode box can acquire the electromyographic signals of a plurality of erector spinae electrodes and perform filtering and noise reduction processing, thereby effectively improving the quality of the signal. The acquisition board converts the electromyographic signals after filtering and noise reduction into digital signal, further enhancing the strength and stability of the signal; secondly, the data transmitter sends the digital signal to the host computer via Bluetooth, realizing wireless transmission of data, which is convenient for patients and doctors to view and analyze data at any time. The data transmitter also has a storage function, which can synchronously store the digital signal in the FLASH of the storage module to ensure the integrity and traceability of the data; in addition, the data transmitter also includes a zero potential electrode to provide a potential reference for multiple erector spinae electrodes, ensuring the accuracy and reliability of the collected electromyographic signals; in addition, the host computer can analyze the received electromyographic signals, obtain analysis data such as muscle force curves and average muscle force curves within a preset time, and display them synchronously in combination with patient information, which helps doctors to understand the patient's spinal rehabilitation more intuitively and provide a basis for formulating personalized rehabilitation plans. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are only used to illustrate specific embodiments and are not considered to limit the present invention. In the entire drawings, the same reference symbols represent the same components. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0027] Figure 1 A schematic diagram of the structure of a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of an electrode box in a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of a data transmitter in a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring provided by an embodiment of the present invention.

[0030] Reference numerals:

[0031] 100, belt; 110, elastic buckle;

[0032] 200, electrode box; 210, erector spinae electrode; 220, positioning protrusion;

[0033] 300, data transmitter; 310, zero potential electrode; 320, receiving module; 330, sending module; 340, storage module; 350, battery; 360, switch; 370, charging interface; 380, connection interface. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present invention.

[0035] Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of methods and systems consistent with some aspects of the present invention as detailed in the appended claims.

[0038] In order to better understand the embodiments of the present invention, the research background of the present invention is first explained below.

[0039] Electromyography can reflect the neuromuscular electrophysiological information of the human body. Currently, many studies have confirmed that people with spinal abnormalities (such as scoliosis, low back pain, muscle spasms, etc.) will have abnormal electromyographic activity characteristics in their back muscles, which can provide rich information for assessing spinal health.

[0040] Existing electromyographic monitoring equipment often provides multiple sets of single-point monitoring electrodes. When multi-point monitoring is required, it is necessary to manually fit them one by one before measurement, which is a large workload, requires fitting more muscle groups, has poor symmetry, and is inconvenient for manual operation. After spinal ablation surgery, it is necessary to monitor the electromyography of the erector spinae muscles. The erector spinae muscles are symmetrically distributed relative to the spine, and the monitoring electrodes may be set symmetrically. When using a single electrode, the layout is more complicated, inefficient, and it is not easy to ensure symmetry.

[0041] There are some high-density electrode array devices available, but these devices are large in size and need to be worn on the back of the body similar to clothes, which makes them inconvenient to use. In addition, there are many electrodes, resulting in high manufacturing costs, which is not convenient for clinical promotion of the devices. However, there is currently no system or device that can conveniently monitor the effects of spinal rehabilitation in the long term in clinical and home environments.

[0042] In summary, the current spinal rehabilitation assessment mainly relies on visual assessment of the subject's body surface characteristics, which has low accuracy. In addition, in some early stages of the disease, the body surface characteristics are not obvious, and pathological problems cannot be discovered in time. Although medical imaging assessment can provide high-precision bone information, medical imaging has problems such as radiation, time-consuming process, multiple site requirements, and high economic costs. It is not suitable for long-term daily spinal health monitoring and high-frequency treatment effect tracking. The existing electromyography detection technology is still in the laboratory research stage. Because the single electromyography arrangement takes a long time and requires professional personnel to perform specific program data processing and analysis, it cannot be directly and conveniently applied to the evaluation, monitoring and early warning of dynamic changes in spinal neuromuscular electrophysiology in the long term.

[0043] At present, most of the equipment used to collect electromyographic signals is relatively large, and cables are required for wired transmission when collecting electromyographic signals, which greatly limits the subject's actions when collecting electromyographic signals and affects the reliability of electromyographic signals. Therefore, using miniaturized detection circuits and wireless transmission for data transmission can avoid these problems. Using such miniaturized equipment can collect electromyographic data without affecting the subject's daily activities.

[0044] As a further improvement of the above technical solution, if the main controller of the acquisition system is located on the monitoring device, the spinal rehabilitation training process can be monitored and recorded in real time. If it is located at the terminal, the monitoring device can be made light, and the data can be transmitted to the terminal wirelessly to realize remote monitoring and alarm. Therefore, the present invention proposes a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring.

[0045] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, the present invention provides a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring, comprising:

[0047] Waist belt 100, electrode box 200, data transmitter 300;

[0048] The electrode box 200 and the data transmitter 300 are both mounted on the waist belt 100 . The electrode box 200 is provided with a plurality of erector spinae electrodes 210 . The plurality of erector spinae electrodes 210 are disposed on both sides of the central axis of the electrode box 200 corresponding to the patient's spine.

[0049] Specifically, the electrode box is equipped with multiple erector spinae electrodes. The erector spinae is a large muscle group located on the back, extending from the neck to the sacrum, and is essential for maintaining spinal stability and posture control. The electrodes arranged in the electrode box are used to collect electromyographic signals (EMG) of the erector spinae, that is, the electrical signals generated when the muscles are active.

[0050] Multiple erector spinae electrodes are distributed on the monitoring surface of the electrode box, and the positions of these electrodes match the two sides of the central axis of the patient's spine to ensure that the activity of the erector spinae muscles can be accurately captured.

[0051] like Figure 2 As shown, the surface of the electrode box 200 is a spine-shaped shell, and the side of the electrode box 200 provided with the erector spinae electrode 210 is a monitoring surface. A positioning protrusion 220 is provided on the monitoring surface, and the positioning protrusion 220 corresponds to the spinal position of the patient to be tested, and is used for fitting and positioning with the concave back spine of the patient to be tested.

[0052] Specifically, four erector spinae electrodes are arranged, two by two, on both sides of the central axis corresponding to the patient's spine, such as Figure 2 As shown in the position of the erector spinae electrodes, the four electrodes are divided into two groups, left and right, respectively, for monitoring the erector spinae muscles symmetrically distributed on the left and right sides. The two channels synchronously monitor the electromyographic signals, which can realize comparative monitoring of the electromyographic signals.

[0053] In addition, the surface of the electrode box is designed as a spine-shaped shell. Its shape and contour imitate the natural curve of the human spine. It can fit the groove of the lumbar spine to achieve automatic positioning of the electrode and improve wearing comfort. It also enables the electrode box to be placed more closely on the user's back, thereby improving the accuracy and comfort of data collection. There are also positioning protrusions on the monitoring surface, which correspond to the spinal position of the patient to be tested. When the electrode box is placed on the back, the positioning protrusions will fit into the depression of the back spine, helping to correctly align the electrodes and the spine, thereby ensuring the accuracy of data collection.

[0054] The electrode box 200 is also provided with a collection board, on which a collection circuit is arranged. The collection circuit is respectively connected to a plurality of erector spinae electrodes 210 to collect the electromyographic signals of the plurality of erector spinae electrodes 210 and perform filtering and noise reduction.

[0055] Furthermore, multiple erector spinae electrodes are respectively connected to the acquisition circuit through analog switches. Through polling control, each electrode is connected to the acquisition circuit to receive electromyographic signal acquisition and filtering amplification. The solution of connecting each acquisition electrode through analog switch polling can reduce the number of cables and the complexity of the circuit. In addition, the electrode box can be expanded according to the different muscle groups being monitored, so that the system can adapt to more electromyographic monitoring scenarios.

[0056] Furthermore, since the electromyographic signal is weak and easily interfered with, it is not suitable to be guided by long wires. Therefore, an electromyographic signal filtering and noise reduction acquisition circuit is set inside the electrode box, and then it is amplified into a V-level analog signal and then transmitted to the wireless data transmitter through the wire. The electrode box is designed to reduce the size of the warehouse, improve patient comfort, and reduce the thickness of the device as much as possible. The thickness of the entire device does not exceed 13mm. There is no battery in the device, and the power supply is connected from the wireless data transmitter through a connecting line.

[0057] The electrode box 200 is provided with an erector spinae electrode 210 on one side which is coplanar with the inner side of the waist belt 100 and is used to fit the erector spinae of the patient to be tested. The multiple erector spinae electrodes 210 synchronously collect electromyographic signals corresponding to the erector spinae of the patient to be tested. The data transmitter 300 sends the electromyographic signals collected by the erector spinae electrodes 210 to the host computer 400 to complete the electromyographic signal collection of the patient to be tested.

[0058] The side of the electrode box with the erector spinae electrode is designed to be coplanar with the inner side of the belt, that is, when the belt is worn on the waist of the patient to be tested, this side of the electrode box (i.e., the side with the erector spinae electrode) will directly fit on the patient's erector spinae muscle, ensuring that the electrode box can closely contact the patient's skin, so that the erector spinae electrode can accurately collect the electromyographic signals generated when the erector spinae muscle is active.

[0059] When collecting electromyographic signals, multiple erector spinae electrodes are used synchronously to collect the electromyographic signals corresponding to the erector spinae muscles of the patient to be tested. Since the erector spinae muscles are a complex muscle group distributed on both sides of the spine, the use of multiple electrodes can more comprehensively capture the details of muscle activity. At the same time, synchronous collection allows all electrodes to start and end the collection process at the same time, which can ensure that the collected data has time consistency and facilitate subsequent data analysis and processing.

[0060] like Figure 3 As shown, the data transmitter 300 includes:

[0061] Receiving module 320, sending module 330, storage module 340;

[0062] The receiving module 320 is used to perform AD sampling on the electrode box 200 to obtain a converted digital signal. The sending module 330 sends the digital signal to the host computer 400 via Bluetooth and simultaneously stores the digital signal in the FLASH of the storage module 340 .

[0063] Furthermore, the receiving module is connected to the connection interface 380. The receiving module is responsible for receiving the signal from the acquisition board in the electrode box. The AD sampling of the electrode box mentioned is actually receiving the digital signal processed by the acquisition board, that is, directly receiving the digital signal, and the sending module sends the received digital signal to the host computer through Bluetooth technology. The storage module includes a FLASH memory for synchronously storing the digital signal received by the receiving module, ensuring data backup and traceability. Even if problems occur during data transmission, the data can be restored from the storage module.

[0064] Wherein, the data transmitter 300 further includes:

[0065] Battery 350, switch 360, charging port 370;

[0066] The switch 360 controls the battery 350 . The battery 350 receives a switching signal from the switch 360 and simultaneously supplies power to the electrode box 200 and the data transmitter 300 . The charging interface 370 is used to charge the battery 350 with an external power source.

[0067] The wireless data transmitter contains a rechargeable lithium battery to provide power for the entire device. The indicator light can provide the Bluetooth connection status and battery charging status. After powering on, the wireless data transmitter automatically receives the electromyographic signals of two channels, and the MCU on the main control circuit board performs AD sampling and digital processing. While storing it in the FLASH on the board, it is transmitted to the patient's mobile phone through the Bluetooth module.

[0068] Wherein, the data transmitter 300 further includes:

[0069] Zero potential electrode 310;

[0070] The zero potential electrode 310 is used to provide a potential reference for the plurality of erector spinae electrodes 210 .

[0071] In a specific embodiment, the zero potential electrode is set behind the battery, which can greatly reduce the common mode interference of electromyography. The zero potential electrode is an important component. It provides a common potential reference point for multiple erector spinae electrodes. During the electromyography signal acquisition process, a stable potential reference is required to ensure the accuracy of the signal. The zero potential electrode is usually placed on the skin of the body away from the muscle activity area.

[0072] The acquisition board is electrically connected to the data transmitter 300 via a wire, and the acquisition board converts the electromyographic signal after filtering and noise reduction into a digital signal and transmits it to the data transmitter 300 .

[0073] The waist belt 100 is a flexible waist belt made of elastic material, and is provided with an elastic buckle 110 for connecting two ends of the waist belt 100 .

[0074] Furthermore, the optional materials for the belt include nylon, spandex, latex or rubber elastic belt, polyester elastic fiber, elastic fabric, and memory alloy belt. When selecting the belt material, factors such as the patient's comfort, allergy history, frequency and duration of use of the belt, and cost need to be considered.

[0075] The host computer 400 is used to analyze the electromyographic signal sent by the data transmitter 300, obtain analysis data, and synchronously visualize the analysis data in combination with patient information.

[0076] The analysis data includes a muscle strength curve corresponding to the monitored electromyographic signal and a muscle strength average curve within a preset time, and the patient information includes at least a muscle strength threshold.

[0077] The patient's mobile phone can receive the data sent by the device through the APP or mini program, and display it in a graphical form, and upload the electromyographic signal to the hospital server. The background data monitoring software system can be deeply customized according to the user's needs. The system functions are as follows:

[0078] User login: including login and logout, and changing login password;

[0079] Main interface: includes a patient list, basic information of each patient, the most recent average muscle strength of each patient, screening conditions (name, age, surgery date, etc.), and filter buttons;

[0080] Patient information: including name, sample number, medical record number, age, surgery date, group, muscle strength threshold, and discharge date;

[0081] Real-time monitoring: muscle strength curve monitoring within one hour;

[0082] Historical review: query the muscle strength curve of a certain day by date, query the average muscle strength curve over a period of time, and export it to a text file;

[0083] Muscle force equipment network configuration tool: configure WIFI SSD, configure WIFI password, configure cloud server address, configure cloud server port.

[0084] In the specific implementation, the main control chip uses Fudan Micro FM33LC023, which is responsible for communicating with the ADC conversion chip for specific electromyographic signal sampling values. The read signal will be encapsulated and transmitted using the Bluetooth 5.2 protocol. The wireless signal is sent through the antenna. The power management module includes an LDO voltage regulator chip and a battery input interface, which can stabilize the input voltage to 3.3V output. The battery is a 200mAH lithium battery.

[0085] The size of the small electromyographic signal acquisition circuit in the present invention is 30mm*30mm. The miniaturized detection circuit can be easily arranged on the back of the human body with less foreign body sensation. After the dual-channel acquisition circuit collects the original muscle point signal, it needs to go through some algorithm comparison to obtain the characteristic value of the muscle electrographic signal.

[0086] During acquisition, the original EMG signal must first be processed using a 6-400Hz digital Butterfly bandpass filter to remove baseline drift and high-frequency noise components in the EMG signal, and then the muscle signal must be processed with a 50Hz notch filter to remove excess power frequency interference noise in the EMG signal.

[0087] The paraspinal EMG signal analysis algorithm can extract relevant features from the EMG signals. After normalizing the EMG signals, time domain indicators such as effective value, root mean square value, kurtosis, skewness, peak factor, pulse factor, and waveform factor can be extracted. Frequency domain indicators such as median frequency can be extracted after Fourier transform of the EMG signals. Nonlinear indicators can be extracted using nonlinear algorithms, including: fractal dimension can be extracted using the box counting algorithm; recursive quantitative analysis can be performed using the third-party crptoolbox of Matlab to extract indicators such as certainty and entropy.

[0088] The electromyographic signals collected from the electrode points are exported to a device capable of data processing through a conductive path. There may be many situations in which muscle activity is abnormal, but in daily exercise situations, the electromyographic signals on the left and right sides of the human back spine are symmetrical to each other. Even in cyclical movements such as walking or running, the sum of the respective electromyographic activities on the left and right sides within a certain period of time maintains a dynamic balance. Therefore, in one way to evaluate whether the muscle activity on both sides of the spine is abnormal, the symmetry of the electromyographic signals on the left and right sides is used to evaluate the left-right balance of spinal activity through symmetry indicators, but the abnormal judgment indicators for evaluating abnormal electromyographic activity are not limited to this.

[0089] When the abnormality judgment index is a symmetry index, one way to obtain it is to calculate the ratio of the sum of the root mean square of the electromyography of the left electrode to the right electrode on the midline of the back spine on each horizontal line, and use the ratio as a symmetry index to assess whether the spine is unbalanced. The closer the ratio is to 1, the better the left-right symmetry of the electromyography is. The closer it is to 0 or greater than 1, it is considered that there is obvious asymmetry of the left and right electromyography activities. The root mean square ratio interval [0.5, 2] is set as the normal interval (i.e., the range within two times the difference). If it falls in other ranges, there is a possibility of spinal activity imbalance.

[0090] Therefore, when the data processing device processes the collected back multi-channel surface electromyography raw signals, operations such as 20-30Hz bandpass filtering, power frequency notching, and removal of ECG signals are included, and then the electromyography root mean square value within a certain time window is taken, and the symmetry index is calculated. The time window size can be adjusted and set, and in a specific embodiment, it is 1s.

[0091] The above-mentioned data analysis method for quantifying muscle activity, or the process of calculating abnormal judgment indicators of electromyographic activity, can be adjusted and changed in the data processing equipment. When the data processing equipment uses a software program to implement data processing, it is only necessary to reload the new program without affecting the structure and component composition of the monitoring equipment.

[0092] By connecting the monitoring device to a mobile phone with Bluetooth function, the collected EMG data, the abnormal judgment indicators obtained, or the process data used to obtain the abnormal judgment indicators can be sent to the cloud through the mobile phone, so that the wearer or professional assessor can view the specific EMG spatiotemporal distribution information on the terminal, and combine big data and machine learning methods to comprehensively evaluate the wearer's long-term EMG signal changes, and then evaluate the health level of the spine. The terminal can store this data. When the terminal supports displaying graphs, it can display the EMG signal change graph during the monitoring time. Taking the above-mentioned symmetry index as an example, the terminal can display the RMS value of each channel according to the arrangement order of the EMG electrode array to draw an RMS topographic map.

[0093] If the early warning module is further integrated on the basis of the integrated data processing module and the communication module; or the data processing module is integrated with the early warning module, it can be realized that in real-time evaluation or monitoring, within a certain set time, when a certain level of myoelectric activity is abnormal, such as the left-right symmetry index is in an abnormal range for a long time, a warning is issued through the buzzer or vibrator in the early warning module to prompt abnormal muscle activity on the left and right sides of the spine. The early warning can also be achieved by flashing lights of different colors. If there is a communication module in the integration, remote early warning prompts can also be realized. The prompt function of the early warning module can be turned on or off. The set time can be 10 minutes, 30 minutes, 45 minutes, 60 minutes, etc.

[0094] The integrated data processing module and communication module, or the integrated data processing module, communication module and early warning module, or the integrated data processing module and early warning module may be located on the monitoring device or may not be located on the monitoring device.

[0095] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0096] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0097] The present invention provides a multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring. The electrodes used to monitor spinal rehabilitation need to be attached to the patient's waist and back, and many rehabilitation trainings require the patient to lie flat on the bed. Therefore, the electrodes attached to the patient's back need to meet the following requirements: they are firm enough so that the electrodes will not fall off due to the patient's rehabilitation training; they are small enough so that the patient does not feel uncomfortable due to the electrodes on the back, thereby affecting the rehabilitation training; the patient should be able to attach the electrodes by himself, so that the patient can also perform rehabilitation monitoring at home.

[0098] To achieve the above requirements, the present invention splits the conventional device host into two major parts: an electrode box and a wireless data transmitter. Both parts are fixed on an elastic flexible belt and connected by thin wires. The two parts are realized through the spinal positioning protrusions on the electrode box and the symmetrically arranged electrode collection chips.

[0099] In the past, the rehabilitation process of spinal surgery was mainly monitored by patient complaints, physical examinations, and imaging examinations. The monitoring process is highly subjective, costly, and inconvenient, and there is a lack of objective indicators for the evaluation of the dynamic function of spinal rehabilitation. In recent years, many scholars have used surface electromyography to study patients and have achieved certain results. Surface electromyography is a one-dimensional time series signal of bioelectric changes in the neuromuscular system during muscle activity, which is guided and recorded from the skin surface of the detected muscle. It is a non-invasive examination that can dynamically monitor the electrophysiological activity during muscle contraction and quantitatively analyze the muscle function state.

[0100] The device and system of the present invention are convenient for patients to carry around and can perform continuous electromyography monitoring at home. The data can be synchronously transmitted to the hospital, making it easier for doctors to conduct monitoring and evaluation.

[0101] At present, the research on paraspinal muscles mainly focuses on the paraspinal muscles in isometric contraction state, movement state, and static position state, and conducts unsupported posture maintenance tests to evaluate the reliability of measurement results within the same day and between different days. The results show that the reliability of paraspinal muscle surface electromyography examination is good. et al. used surface electromyography detection technology to examine the erector spinae and multifidus muscles of patients in the rehabilitation process. Patients underwent isometric contraction tests of the lumbar and back muscles. The bilateral electromyograms were measured, and the median frequency slope and average electromyographic amplitude were calculated. It was found that the average electromyographic amplitude of patients with faster recovery and patients with slower recovery was significantly different, so we believe that surface electromyography can be used as one of the objective indicators of spinal rehabilitation progress and has good clinical application value.

[0102] The electromyographic signal originates from the bioelectric activity of the alpha motor neurons in the spinal cord under the control of the motor cortex of the brain. It is formed by the sum of the potentials of many peripheral motor units in time and space. The changes in the amplitude and frequency characteristics of the signal depend on the synchronization of motor unit activity and muscle fiber recruitment under different muscle activity levels and functional states.

[0103] As well as the physiological factors such as the decrease in the conduction velocity of muscle fiber excitation, as well as the measurement factors such as the position of the detection electrode, skin temperature, muscle length, and muscle contraction mode. Under well-controlled conditions, the changes in the above SEMG signal activity can, to a large extent, quantitatively reflect the changes in muscle activity and central control characteristics such as the local fatigue degree of muscle activity, muscle strength level, muscle activation mode, motor unit excitation conduction velocity, and coordination of multiple muscle groups. Therefore, it has important academic value and application significance for clinical and basic research in rehabilitation medicine.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring, characterized in that: include: Belt, electrode box, data transmitter; The electrode box and the data transmitter are both mounted on the waist belt, and the electrode box is provided with a plurality of erector spinae electrodes, which are arranged on both sides of the central axis of the electrode box corresponding to the patient's spine; The electrode box is provided with an erector spinae electrode on one side which is coplanar with the inner side of the waist belt and is used to fit the erector spinae of the patient to be tested. The multiple erector spinae electrodes synchronously collect electromyographic signals corresponding to the erector spinae of the patient to be tested. The data transmitter sends the electromyographic signals collected by the erector spinae electrodes to the host computer to complete the electromyographic signal collection of the patient to be tested.

2. A multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 1, characterized in that: The surface of the electrode box is a spine-shaped shell. The side of the electrode box with erector spinae electrodes is a monitoring surface. The monitoring surface is provided with a positioning protrusion, which corresponds to the spine position of the patient to be tested and is used to fit and position with the concave back spine of the patient to be tested.

3. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 1, characterized in that: The electrode box is also provided with a collection board, on which a collection circuit is arranged. The collection circuit is respectively connected to a plurality of erector spinae electrodes to collect electromyographic signals of the plurality of erector spinae electrodes and perform filtering and noise reduction.

4. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 3, characterized in that: The acquisition board is electrically connected to the data transmitter via a wire, and the acquisition board converts the filtered and denoised electromyographic signal into a digital signal and transmits it to the data transmitter.

5. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 1, characterized in that: The data transmitter comprises: Receiving module, sending module, storage module; The receiving module is used to perform AD sampling on the electrode box to obtain a converted digital signal. The sending module sends the digital signal to a host computer via Bluetooth and synchronously stores the digital signal in the FLASH of the storage module.

6. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 5, characterized in that: The data transmitter also includes: Battery, switch, charging port; The switch controls the battery, the battery receives the switching signal of the switch and synchronously supplies power to the electrode box and the data transmitter, and the charging interface is used to charge the battery with an external power source.

7. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 5, characterized in that: The data transmitter also includes: Zero potential electrode; The zero potential electrode is used to provide a potential reference for a plurality of erector spinae electrodes.

8. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 1, characterized in that: The waist belt is a flexible waist belt made of elastic material, and is also provided with elastic buckles for connecting the two ends of the waist belt.

9. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 1, characterized in that: The host computer is used to analyze the electromyographic signal sent by the data transmitter, obtain analysis data, and synchronously visualize the analysis data in combination with patient information.

10. The multi-channel surface electromyography signal acquisition system for spinal rehabilitation monitoring according to claim 9, characterized in that: The analysis data includes a muscle force curve corresponding to the monitored electromyographic signal and a muscle force average value curve within a preset time, and the patient information includes at least a muscle force threshold.

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