Electrophysiological positioning method and device

Abstract

The invention discloses an electrophysiological positioning method and device, and the method comprises the steps: presetting voltage or frequency parameters of motion stimulation and sensory stimulation, presetting an operation safety threshold range and a stimulation amplitude threshold range of an RMS value of a surface electromyogram signal of a lesion part, and puncturing the lesion part through an electrode needle to output radio frequency, a surface electromyogram signal acquisition device acquires a surface electromyogram signal, processes and calculates the surface electromyogram signal, compares the surface electromyogram signal with an operation safety threshold range and a stimulation amplitude threshold range, and judges whether an RMS value of the surface electromyogram signal conforms to the operation safety threshold range and the stimulation amplitude threshold range or not; if the motion stimulation and the sensory stimulation both accord with the threshold range, electrophysiological positioning is completed. According to the invention, electrophysiological positioning results of motion stimulation and sensory stimulation can be displayed objectively and digitally, subjectivity and uncertainty of the electrophysiological positioning results caused by individual differences are avoided, and accuracy and reliability of electrophysiological positioning are improved while safety of surgical operation is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency equipment, and in particular to an electrophysiological positioning method and device. Background Art

[0002] At present, when treating neuropathic pain, radiofrequency technology is generally used to stimulate and destroy the pain nerve fiber conduction branch, block the pain conduction pathway, and achieve the purpose of controlling pain. According to the standard surgical procedure, an electrophysiological positioning step needs to be implemented before surgery. This process includes two methods: motor stimulation and sensory stimulation. The doctor needs to evaluate whether the tip of the electrode needle has avoided key structures such as motor sensory nerves or blood vessels based on the patient's immediate feedback (such as the intensity of muscle tremors, the degree of pain felt by the patient, etc.). However, this evaluation method based on muscle tremor intensity and patient's subjective pain perception is relatively limited in accuracy and objectivity, and needs to rely too much on the doctor's personal rich experience and judgment, which may lead to inaccurate positioning of the surgical target nerve, thereby increasing the risk of accidental injury to surrounding tissues during surgery and causing unnecessary damage. Therefore, how to design a device or method that can intelligently judge the effect of radiofrequency stimulation and improve the accuracy and safety of electrophysiological positioning is a problem that technicians in this field need to solve. Summary of the invention

[0003] In order to overcome the problems in the prior art, the purpose of the present invention is to provide an electrophysiological positioning method and device, which can represent the stimulation effect through objective data and intelligently perform the electrophysiological positioning process through program settings.

[0004] To achieve the above object, the technical solution of the present invention is as follows: an electrophysiological positioning method, comprising:

[0005] Step S1: respectively presetting the radio frequency parameters of the motion stimulation mode and the sensory stimulation mode, respectively presetting the surgical safety threshold ranges of the voltage and current, respectively presetting the stimulation amplitude threshold range of the RMS value of the surface electromyographic signal of the lesion site, inserting the electrode needle into the approximate lesion site, attaching the electromyographic electrode patch to the skin surface near the electrode needle position, and starting the host computer;

[0006] Step S2: Turn on the motion stimulation mode and select the stimulation mode of voltage or current. Except for the voltage or current, other radio frequency parameters are fixedly set according to the preset radio frequency parameters of the motion stimulation mode. The initial voltage or current is the minimum value of the surgical safety threshold range, and the electrode needle outputs the corresponding parameter radio frequency;

[0007] Step S3: The surface electromyography signal acquisition device acquires the surface electromyography signal, and the host computer pre-processes the acquired surface electromyography signal to calculate the RMS value of the first surface electromyography signal; it is determined whether the RMS value of the first surface electromyography signal meets the stimulation amplitude threshold range, if so, a third prompt message is issued and the process jumps to step S6, if not, a second prompt message is issued and step S4 is executed;

[0008] Step S4: increasing the voltage or current value by one gear;

[0009] Step S5: determine whether the current voltage or current value meets the surgical safety threshold range. If so, execute step S3; if not, issue a first prompt message, adjust the electrode needle position, and then return to step S2;

[0010] Step S6: Switching to the sensory stimulation mode, except for the voltage or current, other radio frequency parameters are fixedly set according to the preset sensory stimulation mode radio frequency parameters, the initial voltage or current is the minimum value of the surgical safety threshold range, and the electrode needle outputs radio frequency;

[0011] Step S7: The surface electromyography signal acquisition device acquires the surface electromyography signal, the host computer pre-processes the acquired surface electromyography signal, and calculates the RMS value of the second surface electromyography signal; determines whether the RMS value of the second surface electromyography signal meets the surgical safety threshold range, if so, issues a fourth prompt message to complete the electrophysiological positioning; if not, issues a second prompt message, and then executes step S8;

[0012] Step S8: Increase the voltage or current value by one gear.

[0013] Step S9: determine whether the current voltage or current value meets the surgical safety threshold range. If so, execute step S7. If not, issue a first prompt message, adjust the electrode needle position, and then return to step S2.

[0014] Further, in step S3 or step S7, the method for preprocessing the collected surface electromyography signals is specifically: taking every n consecutively collected surface electromyography signals as a data group, and performing denoising processing on the surface electromyography signals in the data group.

[0015] Furthermore, the denoising method is specifically as follows: sorting the n surface electromyography signal data in the data group according to size, and removing the largest m / 2 data and the smallest m / 2 data in the data group.

[0016] Furthermore, the RMS value calculation formula of the surface electromyography signal is:

[0017]

[0018] Wherein, sEMG is the surface electromyography signal, n is the number of surface electromyography signals in the data group before denoising, and m is the number of noise data points.

[0019] Furthermore, the first prompt message is “The current stimulation amplitude exceeds the threshold, please adjust the electrode needle position in time!”;

[0020] The second prompt message is “Motor stimulation mode has been completed, please switch to sensory stimulation mode!”;

[0021] The third prompt information is "the sensory stimulation mode has been completed, and the electrophysiological positioning process has been completed."

[0022] The present invention also provides an electrophysiological positioning device for implementing the above-mentioned electrophysiological positioning method, including a central control module, a display screen, a radio frequency data processing module and an electrode needle, the display screen is electrically connected to the central control module, the output end of the central control module is connected to the input end of the radio frequency data processing module, the output end of the radio frequency data processing module is connected to the input end of the electrode needle, and also includes a surface electromyography signal processing module and a surface electromyography signal acquisition module, the output end of the surface electromyography signal acquisition module is connected to the input end of the surface electromyography signal processing module, and the output end of the surface electromyography signal processing module is connected to the input end of the central control module; and also includes a storage module, the storage module is connected to the central control module, and the storage module is used to store the stimulation amplitude threshold range of the surface electromyography signals of various lesion sites, the radio frequency parameters of the motion stimulation mode and the sensory stimulation mode, and the surgical safety threshold range.

[0023] The radio frequency parameters of the motion stimulation mode and the sensory stimulation mode are preset respectively, the surgical safety threshold range of the voltage or current value of the motion stimulation mode and the sensory stimulation mode is preset, and the stimulation amplitude threshold range of the RMS value of the surface electromyography signal of the lesion site is preset.

[0024] Furthermore, the surface electromyography signal processing module includes:

[0025] A first amplifier circuit is used to amplify the collected surface electromyography signal;

[0026] A filter circuit, connected to the output end of the first amplifying circuit, for removing noise and interference in the surface electromyography signal;

[0027] A resonant circuit, connected to the output end of the filter circuit, for further enhancing or suppressing the surface electromyographic signal of a specific frequency;

[0028] A second amplifying circuit is connected to the output end of the resonant circuit to further amplify the surface electromyography signal;

[0029] The output end of the second amplifier circuit is connected to the central control module.

[0030] Furthermore, it also includes an indicator light, the input end of the indicator light is connected to the output end of the central control module, and the indicator light is used to feedback the operating status.

[0031] Furthermore, the surface electromyography signal acquisition module uses electromyography electrode patches.

[0032] The present invention can objectively and digitally display the electrophysiological localization results of motor stimulation and sensory stimulation based on the principle that muscle nerves will produce bioelectric current changes when they are electrically stimulated, by collecting and analyzing surface electromyographic signals, avoiding the subjectivity and uncertainty of electrophysiological localization results due to individual differences, ensuring the precise localization of target nerves by presetting the stimulation amplitude threshold range, and intelligently performing the detection and judgment process by presetting the surgical safety threshold range and the stimulation amplitude threshold range, without relying on the doctor's experience, and objectively and efficiently outputting the electrophysiological localization results. The present invention can improve the accuracy and reliability of localization, while ensuring the safety of surgical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of an electrophysiological localization method according to Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of an electrophysiological positioning device according to Example 2 of the present invention. DETAILED DESCRIPTION

[0035] Example 1

[0036] The present invention also provides an electrophysiological positioning method, such as Figure 1 As shown, including:

[0037] Step S1: respectively presetting the radio frequency parameters of the motion stimulation mode and the sensory stimulation mode, respectively presetting the surgical safety threshold ranges of the voltage and current, respectively presetting the stimulation amplitude threshold range of the RMS value of the surface electromyographic signal of the lesion site, inserting the electrode needle into the approximate lesion site, attaching the electromyographic electrode patch to the skin surface near the electrode needle position, and starting the host computer;

[0038] Specifically, the intensity and morphology of the surface electromyographic signal may be different at different lesion sites, so it is necessary to preset the stimulation amplitude threshold range of the surface electromyographic signal at multiple lesion sites. The present invention provides an electrophysiological positioning method with two electrical stimulation modes: motor stimulation and sensory stimulation. Motor stimulation generally uses low-frequency stimulation of motor nerves, and sensory stimulation generally uses high-frequency stimulation of sensory nerves. The radio frequency parameters of the motor stimulation mode and the sensory stimulation mode are preset respectively, including temperature, frequency, current, voltage, etc. At the same time, each mode can be selected to stimulate by current or voltage, and the surgical safety threshold range of voltage and current is preset. In this embodiment, the stimulation amplitude threshold is (0.1-5V) in the voltage stimulation mode, and the stimulation amplitude threshold is (0.1-10mA) in the current stimulation mode.

[0039] The doctor inserts the electrode needle into the approximate lesion site. The entire electrode needle is made of insulating material, and only the exposed tip of the electrode needle can transmit current. Then the positive and negative patches of the electromyography electrode patch are attached to the skin surface near the electrode needle, and the host computer is started.

[0040] Step S2: Turn on the motion stimulation mode and select the stimulation mode of voltage or current. Except for the voltage or current, other radio frequency parameters are fixedly set according to the preset radio frequency parameters of the motion stimulation mode. The initial voltage or current is the minimum value of the surgical safety threshold range, and the electrode needle outputs the corresponding parameter radio frequency;

[0041] Specifically, to turn on the motion stimulation mode, the doctor selects the voltage or current stimulation method on the display screen. Taking voltage stimulation as an example (the same applies to current stimulation and will not be repeated here), the preset motion stimulation RF parameters are called up. Except for the voltage, other RF parameters are fixed according to the preset RF parameters of the motion stimulation mode. For example, during motion stimulation, the temperature is set to 40 degrees, the frequency is 1Hz, the current is 5mA, and the initial voltage state is the minimum value of the surgical safety threshold range, which is 0.1V. The doctor can also modify the parameters by himself.

[0042] Step S3: The surface electromyography signal acquisition device acquires the surface electromyography signal, and the host computer pre-processes the acquired surface electromyography signal to calculate the RMS value of the first surface electromyography signal; it is determined whether the RMS value of the first surface electromyography signal meets the stimulation amplitude threshold range, if so, a third prompt message is issued and the process jumps to step S6, if not, a second prompt message is issued and step S4 is executed;

[0043] Specifically, the surface electromyography signal acquisition device is set to collect a surface electromyography signal every 10 milliseconds, and 30 surface electromyography signals are continuously collected, with a total time of 0.3 seconds. The method for preprocessing the collected surface electromyography signals is specifically as follows: 30 surface electromyography signals are taken as a data group, and then all the data in the data group are sorted by size, and the two largest data are removed, and the two smallest data are removed to obtain a group of 26 surface electromyography signals with noise interference removed. Further, the RMS value (root mean square) of the 26 surface electromyography signals is calculated; the RMS value calculation formula of the 26 surface electromyography signals is:

[0044] Among them, sEMG is the surface electromyography signal.

[0045] Determine whether the RMS value meets the stimulation amplitude threshold range. If the RMS value meets the stimulation amplitude threshold range, it means that the current voltage amplitude has not caused drastic neuromuscular bioelectric changes, and the electrode needle has not pierced the motor nerve. The system issues a third prompt message, "Motor stimulation mode is completed, please switch to sensory stimulation mode!", and jumps to step S6. If the RMS value does not meet the stimulation amplitude threshold range, it means that the current voltage amplitude causes abnormal bioelectric changes in the nerves and muscles, and the system issues a second prompt message, "The current stimulation amplitude does not meet the electrophysiological stimulation threshold, please adjust the voltage or current gear!". After the display prompts the message, continue to step S4.

[0046] Step S4: increasing the voltage or current value by one gear;

[0047] Specifically, the gear can be set to 0.1V, 0.5V or 1V, etc. according to actual application requirements. In this embodiment, 0.5V is selected as a gear, other radio frequency parameters are kept unchanged, and the voltage value of one gear is increased, that is, the electrode needle has a temperature of 40 degrees, a frequency of 1Hz, and a current of 5mA, and the voltage is increased from 0.1V in the previous round to 0.6V, and the electrode needle outputs radio frequency with corresponding parameters.

[0048] Step S5: determine whether the current voltage or current value meets the surgical safety threshold range. If so, execute step S3; if not, issue a first prompt message, adjust the electrode needle position, and then return to step S2;

[0049] Specifically, the current voltage value is 0.6V, which meets the surgical safety threshold of voltage (0.1-5V), which means that the current stimulation amplitude will not cause damage to the nerves and muscles. The current stimulation amplitude can be maintained and the next step can be performed; if the current voltage value does not meet the surgical safety threshold of voltage (0.1-5V), it means that the RMS value of the surface electromyography signal collected and calculated at the current lesion site that traverses the entire surgical safety requirement threshold range does not meet the stimulation amplitude threshold range. The system immediately issues a first prompt message, which is "The current stimulation amplitude exceeds the surgical safety threshold, please adjust the electrode needle position in time!", and turns on the indicator light to flash to prompt, and promptly warns the doctor. After the doctor adjusts the electrode needle position, the system returns to execute step S2 and re-performs motor stimulation.

[0050] Step S6: Switching to the sensory stimulation mode, except for the voltage or current, other radio frequency parameters are fixedly set according to the preset sensory stimulation mode radio frequency parameters, the initial voltage or current is the minimum value of the surgical safety threshold range, and the electrode needle outputs radio frequency;

[0051] Specifically, since doctors need to perform motor stimulation first and then sensory stimulation according to the standard radio frequency treatment operation process, the present invention also needs to cooperate with the radio frequency treatment operation process to monitor the stimulation amplitude in two rounds. Turn on the sensory stimulation mode and call the preset sensory stimulation radio frequency parameters. Except for the voltage, other radio frequency parameters are fixed according to the preset radio frequency parameters of the sensory stimulation mode, such as the temperature is 50 degrees, the frequency is 50Hz, the current is 5mA, and the initial voltage state is the minimum value of the surgical safety threshold range, that is, 0.1V. Doctors can also modify the parameters by themselves.

[0052] Step S7: The surface electromyography signal acquisition device acquires the surface electromyography signal, the host computer pre-processes the acquired surface electromyography signal, and calculates the RMS value of the second surface electromyography signal; determines whether the RMS value of the second surface electromyography signal meets the surgical safety threshold range, if so, issues a fourth prompt message to complete the electrophysiological positioning; if not, issues a second prompt message, and then executes step S8;

[0053] The calculation method of the RMS value of the second surface electromyographic signal is consistent with the above-mentioned step S3 and will not be repeated here. It is judged whether the RMS value meets the stimulation amplitude threshold range. If the RMS value meets the stimulation amplitude threshold range, it means that the current voltage amplitude has not caused drastic neuromuscular bioelectric changes, and the electrode needle has not pierced the sensory nerve. The system issues a third prompt message, "The sensory stimulation mode has been completed, and the electrophysiological positioning process is completed!", and the electrophysiological positioning is completed.

[0054] If the RMS value does not meet the stimulation amplitude threshold range, it means that the current voltage amplitude has caused abnormal bioelectric changes in the neuromuscular system. The system will issue a second prompt message "The current stimulation amplitude does not meet the electrophysiological stimulation threshold, please adjust the voltage or current level!" and continue to step S8.

[0055] Step S8: Increase the voltage or current value by one gear.

[0056] Specifically, consistent with step S4, in this embodiment, 0.5V is selected as a gear, other RF parameters are kept unchanged, and the voltage value is increased by one gear, that is, the electrode needle has a temperature of 50 degrees, a frequency of 50Hz, and a current of 5mA. The voltage increases from 0.1V in the previous round to 0.6V, and the electrode needle outputs RF with corresponding parameters, and the system jumps to step S9.

[0057] Step S9: Determine whether the current voltage or current value meets the surgical safety threshold range. If so, execute step S7. If not, issue a first prompt message, adjust the electrode needle position, and return to execute step S2.

[0058] Specifically, if the current voltage value is 0.6V, which meets the voltage surgical safety threshold (0.1-5V), it means that the current stimulation amplitude will not cause neuromuscular damage, and the current stimulation amplitude can be maintained, and step S8 is continued. If the current voltage value does not meet the voltage surgical safety threshold (0.1-5V), it means that the RMS value of the surface electromyographic signal collected and calculated by the voltage of the current lesion site traversing the entire surgical safety requirement threshold range does not meet the stimulation amplitude threshold range, and the motor stimulation of the current lesion site is unsuccessful. The system immediately issues a first prompt message, which is "The current stimulation amplitude exceeds the threshold, please adjust the electrode needle position in time!", and turns on the indicator light to flash to prompt, and promptly warn the doctor to adjust the electrode needle position. Since it is necessary to follow the standard process of performing motor stimulation first and then sensory stimulation, after the doctor adjusts the electrode needle position, the system returns to step S2 and re-executes the motor stimulation operation.

[0059] In summary, the working principle of this embodiment is: by continuously increasing the voltage or current within the surgical safety threshold range at the lesion site to perform motor stimulation and sensory stimulation on the patient, and obtaining the RMS value of the surface electromyography signal by collecting and analyzing, if the RMS value of the surface electromyography signal obtained in the motor stimulation and sensory stimulation meets the stimulation amplitude threshold range, the electrophysiological positioning is completed. If the voltage or current that traverses the surgical safety threshold range at the lesion site still does not obtain the RMS of the surface electromyography signal that meets the stimulation amplitude threshold range, the doctor is prompted to adjust the electrode needle position and restart the motor stimulation. The present invention can avoid the subjectivity and uncertainty of the electrophysiological positioning results caused by individual differences, pain differences and other factors by collecting objective neuromuscular bioelectric signal data, and obtain objective and accurate electrophysiological positioning results through intelligent data analysis and detection processes, reducing the dependence on doctor's experience and ensuring accurate positioning of the target nerve.

[0060] Example 2

[0061] The present application is to provide an electrophysiological positioning device, such as Figure 2 As shown, it includes: a central control module, a display screen, a radio frequency data processing module and an electrode needle, the display screen is electrically connected to the central control module, the output end of the central control module is connected to the input end of the radio frequency data processing module, and the output end of the radio frequency data processing module is connected to the input end of the electrode needle. It also includes a surface electromyography signal processing module and a surface electromyography signal acquisition module, the output end of the surface electromyography signal acquisition module is connected to the input end of the surface electromyography signal processing module, and the output end of the surface electromyography signal processing module is connected to the input end of the central control module. The surface electromyography signal acquisition device adopts electromyography electrode patches, and the electromyography electrode patches are two-piece, namely a positive patch and a negative patch, and three-piece or four-piece electromyography electrode patches can also be used.

[0062] The surface electromyography signal processing module includes: a first amplifier circuit, which is connected to the output end of the surface electromyography electrode patch. Since the surface electromyography signal is usually very weak (usually in the range of 0 to 2mV), the first amplifier circuit is used to preliminarily amplify the collected surface electromyography signal so that the subsequent circuit can process and identify it more effectively.

[0063] The filter circuit is connected to the output end of the first amplifying circuit and is used to remove noise and interference in the surface electromyography signal.

[0064] A resonant circuit connected to the output end of the filter circuit, for further enhancing or suppressing a signal of a specific frequency;

[0065] A second amplifying circuit is connected to the output end of the resonant circuit, and further amplifies the filtered surface electromyographic signal to meet the input requirements of subsequent signal analysis;

[0066] The output end of the second amplifier circuit is connected to the central control module.

[0067] It also includes a storage module and an indicator light. The storage module is connected to the central control module, and the storage module is used to store the surgical safety threshold range and stimulation amplitude threshold range of surface electromyography signals of various lesion sites; the input end of the indicator light is connected to the output end of the central control module, and the indicator light is used to feedback the operating status.

[0068] This embodiment outputs radio frequency through electrode needles, collects surface electromyographic signals of muscle nerves during electrophysiological positioning radio frequency stimulation in real time through electromyographic electrode patches, and processes and outputs them in real time through surface electromyographic signal acquisition modules, and finally can display the changes in bioelectric signals caused by radio frequency stimulation of muscle nerves in a digital manner, providing doctors with intuitive and visual data support. Based on these data, doctors can more accurately judge whether electrophysiological positioning is accurate, thereby achieving precise locking of the target nerve position, greatly improving the accuracy and safety of the operation.

[0069] The two embodiments described above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electrophysiological positioning method, characterized in that: include: Step S1: respectively presetting the radio frequency parameters of the motion stimulation mode and the sensory stimulation mode, respectively presetting the safety threshold ranges of the surgical voltage and current, respectively presetting the stimulation amplitude threshold range of the RMS value of the surface electromyographic signal of the lesion site, inserting the electrode needle into the approximate lesion site, attaching the electromyographic electrode patch to the skin surface near the electrode needle position, and starting the host computer; Step S2: Turn on the motion stimulation mode and select the stimulation mode of voltage or current. Except for the voltage or current, other radio frequency parameters are fixedly set according to the preset radio frequency parameters of the motion stimulation mode. The initial voltage or current is the minimum value of the surgical safety threshold range, and the electrode needle outputs the corresponding parameter radio frequency; Step S3: The surface electromyography signal acquisition device acquires the surface electromyography signal, and the host computer pre-processes the acquired surface electromyography signal to calculate the RMS value of the first surface electromyography signal; Determine whether the RMS value of the first surface electromyography signal meets the stimulation amplitude threshold range, if yes, issue a third prompt message and jump to step S6, if no, issue a second prompt message and then execute step S4; Step S4: increasing the voltage or current value by one gear; Step S5: determine whether the current voltage or current value meets the surgical safety threshold range. If so, execute step S3; if not, issue a first prompt message, adjust the electrode needle position, and then return to step S2; Step S6: Switching to the sensory stimulation mode, except for the voltage or current, other radio frequency parameters are fixedly set according to the preset sensory stimulation mode radio frequency parameters, the initial voltage or current is the minimum value of the surgical safety threshold range, and the electrode needle outputs radio frequency; Step S7: the surface electromyography signal acquisition device acquires the surface electromyography signal, the host computer pre-processes the acquired surface electromyography signal, and calculates the RMS value of the second surface electromyography signal; Determine whether the RMS value of the second surface electromyography signal meets the surgical safety threshold range. If yes, issue a fourth prompt message to complete the electrophysiological positioning; if no, issue a second prompt message and execute step S8; Step S8: increasing the voltage or current value by one gear; Step S9: Determine whether the current voltage or current value meets the surgical safety threshold range. If so, execute step S7. If not, issue a first prompt message, adjust the electrode needle position, and return to execute step S2.

2. An electrophysiological positioning method as claimed in claim 1, characterized in that: In step S3 or step S7, the method for preprocessing the collected surface electromyography signals is specifically: taking every n consecutively collected surface electromyography signals as a data group, and performing denoising processing on the surface electromyography signals in the data group.

3. An electrophysiological positioning method as claimed in claim 2, characterized in that: The denoising method is specifically as follows: sorting the n surface electromyography signal data in the data group according to their size, and removing the largest m / 2 data and the smallest m / 2 data in the data group.

4. An electrophysiological positioning method as claimed in claim 3, characterized in that: The RMS value calculation formula of the surface electromyography signal is: Wherein, sEMG is the surface electromyography signal, n is the number of surface electromyography signals in the data group before denoising, and m is the number of noise data points.

5. An electrophysiological positioning method as claimed in claim 1, characterized in that: The first prompt information includes a text prompt and a light prompt, the text prompt is "The current stimulation amplitude exceeds the surgical safety threshold, please adjust the electrode needle position in time!", and the light prompt is to turn on and flash the indicator light; The second prompt message is "The current stimulation amplitude does not meet the electrophysiological stimulation threshold, please adjust the voltage or current level!" The third prompt message is "Motion stimulation mode has been completed, please switch to sensory stimulation mode!"; The fourth prompt message is "The sensory stimulation mode has been completed, and the electrophysiological positioning process has been completed!".

6. An electrophysiological positioning device, used to implement an electrophysiological positioning method as described in any one of claims 1 to 5, characterized in that: It includes a central control module, a display screen, a radio frequency data processing module and an electrode needle, wherein the display screen is electrically connected to the central control module, the output end of the central control module is connected to the input end of the radio frequency data processing module, the output end of the radio frequency data processing module is connected to the input end of the electrode needle, and also includes a surface electromyography signal processing module and a surface electromyography signal acquisition module, the output end of the surface electromyography signal acquisition module is connected to the input end of the surface electromyography signal processing module, and the output end of the surface electromyography signal processing module is connected to the input end of the central control module; and also includes a storage module, wherein the storage module is connected to the central control module, and the storage module is used to store the stimulation amplitude threshold range of the surface electromyography signals of various lesion sites, the radio frequency parameters of the motion stimulation mode and the sensory stimulation mode, and the surgical safety threshold range.

7. An electrophysiological positioning device as claimed in claim 6, characterized in that: The surface electromyography signal processing module comprises: A first amplifier circuit is used to amplify the collected surface electromyography signal; A filter circuit, connected to the output end of the first amplifying circuit, for removing noise and interference in the surface electromyography signal; A resonant circuit, connected to the output end of the filter circuit, for further enhancing or suppressing the surface electromyographic signal of a specific frequency; A second amplifying circuit is connected to the output end of the resonant circuit to further amplify the surface electromyography signal; The output end of the second amplifier circuit is connected to the central control module.

8. An electrophysiological positioning device as claimed in claim 6, characterized in that: It also includes an indicator light, the input end of the indicator light is connected to the output end of the central control module, and the indicator light is used to feedback the operating status.

9. An electrophysiological positioning device as claimed in claim 6, characterized in that: The surface electromyography signal acquisition module adopts electromyography electrode patches.

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