Concentric array electrical stimulation system, array needle electrode and applications

Abstract

The application discloses a concentric circular array electric stimulation system, an array needle electrode and application, and belongs to the technical field of medical equipment; the system comprises an array needle electrode unit, a multi-channel stimulation generator, a stimulation control module and a data processing and display unit; the array needle electrode unit comprises a needle body, a needle handle and a plurality of stimulation electrodes, wherein a central stimulation electrode is located on the central axis of the needle body, seven peripheral stimulation electrodes are uniformly distributed in a concentric circular array along the circumference of the needle body shell, and each electrode is connected to the needle handle through an independent insulated wire; the multi-channel stimulation generator independently generates and outputs adjustable electric stimulation signals for each electrode; the stimulation control module independently controls the stimulation parameters of each electrode; through the multi-electrode array design and the multi-channel independent control, the application overcomes the defects of the limited stimulation range of the traditional single-channel needle electrode and the need for repeated position adjustment, and significantly improves the effect of neuromuscular function reconstruction and rehabilitation treatment.

Description

Technical Field

[0001] This invention belongs to the field of measurement equipment technology, specifically relating to a concentric circle array electrical stimulation system, array needle electrodes and their applications. Background Technology

[0002] Electrical stimulation technology has significant clinical application value in neuromuscular rehabilitation, functional recovery, and pain management. Deep muscle electrical stimulation, as an effective treatment method, is widely used in the prevention of muscle atrophy, reconstruction of motor function, rehabilitation of nerve injuries, and management of chronic pain. Through precise control of electrical stimulation parameters, deep muscle fibers can be activated, promoting muscle contraction, improving local blood circulation, and enhancing muscle strength, thereby achieving therapeutic and rehabilitative goals.

[0003] Currently, clinically used needle electrode electrostimulation systems mainly employ single-channel or low-channel needle electrodes, typically with only one or a few stimulation contacts. This limits the stimulation area and makes it difficult to achieve precise spatial stimulation and multi-point synergistic stimulation of deep muscle tissue. When stimulating a large area of ​​muscle tissue or finding the optimal stimulation site, it is often necessary to repeatedly adjust the insertion position and angle of the needle electrode. This not only increases patient discomfort and the risk of tissue damage but also reduces treatment efficiency.

[0004] Single-channel stimulation cannot achieve advanced stimulation modes such as spatial sequence activation and selective muscle recruitment, limiting the ability to precisely control complex muscle tissue structures. When there is a slight shift in electrode position or a change in tissue impedance, it cannot be detected and adjusted in time, which may lead to unstable stimulation effects or inaccurate stimulation parameters, affecting the safety and effectiveness of treatment.

[0005] Therefore, there is an urgent need to develop a novel electrical stimulation system with functions such as multi-electrode array structure, multi-channel independent control, and real-time monitoring feedback, in order to overcome the limitations of existing technologies and improve the accuracy, effectiveness, and safety of deep muscle electrical stimulation therapy. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes a concentric array electrical stimulation system, array needle electrodes, and their applications. The system arranges a central stimulation electrode and multiple peripheral stimulation electrodes in a concentric circle on a single needle body, and, in conjunction with multi-channel independent stimulation control technology, achieves multi-point, precise, and controllable electrical stimulation of deep muscle tissue.

[0007] The solution of the present invention is as follows:

[0008] A concentric array electrical stimulation system, the system comprising: an array needle electrode unit, a multi-channel stimulator generator, a stimulation control module, and a data processing and display unit.

[0009] The array needle electrode unit includes a needle body, a needle handle, and multiple stimulation electrodes; the needle body is disposed at one end of the needle handle, and the multiple stimulation electrodes include a central stimulation electrode and peripheral stimulation electrodes. The central stimulation electrode is located at the central axis of the needle body, and the peripheral stimulation electrodes are arranged in a concentric circle array along the circumference of the needle body shell; each stimulation electrode is connected to the needle handle through an independent insulated wire.

[0010] The multi-channel stimulation generator is electrically connected to the multiple stimulation electrodes respectively, and is used to independently generate and output multiple electrical stimulation signals.

[0011] The stimulation control module is connected to the multi-channel stimulation generator and is used to independently control the stimulation parameters of each stimulation electrode; the stimulation parameters include stimulation intensity, stimulation frequency, pulse width, stimulation waveform, and stimulation duration.

[0012] The data processing and display unit is connected to the stimulation control module and is used to record stimulation parameters, monitor the stimulation process, and display the system's working status.

[0013] Furthermore, the number of peripheral stimulation electrodes is seven, and the peripheral stimulation electrodes are distributed at equal angular intervals on the outer shell of the needle body.

[0014] Furthermore, the needle body shell has multiple conductive holes corresponding to the number of stimulation electrodes, and each conductive hole has a conductive contact point; the needle body includes an insulating shell and multiple built-in insulating wires, each insulating wire being connected to a stimulation electrode; the diameter of the conductive contact point is 0.3 mm, and the spacing between adjacent conductive contact points is 2 mm; the conductive contact points are made of medical stainless steel, platinum-iridium alloy, or gold alloy.

[0015] Furthermore, the array needle electrode unit also includes a reference electrode, which is disposed on the outer surface of the needle body or on the needle handle to form a stimulation circuit; the reference electrode is a ring electrode or a sheet electrode, and its area is 20-30 times the area of ​​the stimulation electrode.

[0016] Furthermore, the multi-channel stimulation generator includes independent current source units, waveform generation units, and isolation protection units;

[0017] An independent current source unit is used to provide an adjustable constant current stimulation output for each stimulation electrode, with an output current range of 0.1-100mA and a current adjustment accuracy of 0.1mA;

[0018] The waveform generation unit is used to generate at least one stimulation waveform selected from rectangular wave, sine wave, triangular wave, sawtooth wave or custom waveform; the stimulation frequency range is 0.1-1000Hz, and the pulse width range is 10μs-10ms;

[0019] The isolation protection unit is used to provide electrical isolation and overcurrent protection. The electrical isolation adopts opto-isolation or transformer isolation, with an isolation voltage ≥3000V. The overcurrent protection automatically cuts off the output when the output current is detected to exceed the safety threshold.

[0020] Furthermore, the outer diameter of the needle body is 0.45-0.5mm; the effective stimulation length of the needle body is 10-20mm; the total length of the needle body includes three specifications: 37mm, 50mm and 75mm; the needle tip of the needle body adopts a tapered design with a tapered angle of 10°-30°.

[0021] Furthermore, the system also includes an impedance monitoring unit for real-time monitoring of the contact impedance between each stimulation electrode and the tissue;

[0022] The impedance monitoring unit uses the AC impedance measurement method, with a test frequency of 1-10kHz and a test current ≤100μA; it issues an alarm when the detected impedance value exceeds the preset range.

[0023] Furthermore, the data processing and display unit includes a graphical user interface for displaying the working status of each stimulation channel, stimulation parameter settings, real-time impedance values, and output current waveforms; and provides a visual stimulation position diagram, using color coding to display the activation status of each electrode.

[0024] The present invention also provides an array needle electrode for a concentric array electrical stimulation system, the array needle electrode comprising: a needle body, a needle handle, and multiple stimulation electrodes.

[0025] The needle body includes an insulating shell and multiple independent insulating wires disposed within the insulating shell.

[0026] The plurality of stimulation electrodes includes a central stimulation electrode and seven peripheral stimulation electrodes; the central stimulation electrode is located at the central axis of the needle body, and the peripheral stimulation electrodes are evenly distributed in a concentric array along the circumference of the needle body shell; each stimulation electrode is connected to the needle handle end through an independent insulated wire.

[0027] The needle handle is located at the rear end of the needle body, and the needle handle includes multiple independent electrical connection terminals, each of which is connected to a corresponding stimulation electrode.

[0028] The insulating outer shell of the needle body has conductive holes corresponding to the number of stimulation electrodes. Each conductive hole has a conductive contact point, which is electrically connected to the corresponding insulating wire.

[0029] This invention also provides an application of a concentric array electrical stimulation system in deep muscle function reconstruction, based on the system implementation of this invention.

[0030] Methods for achieving muscle stimulation using concentric circle array electrical stimulation systems include:

[0031] The array needle electrodes are inserted into the target deep muscle tissue, and the electrode positions are determined by ultrasound or electromyography guidance.

[0032] The contact impedance of each electrode is measured using the impedance monitoring unit, and the electrode with impedance within the normal range is selected as the stimulation electrode.

[0033] Set stimulation parameters, including stimulation intensity, frequency, and waveform, and use spatial sequence stimulation mode or synchronous stimulation mode to electrically stimulate the target muscle.

[0034] Compared with the prior art, the beneficial effects of this invention are:

[0035] The system of this invention not only breaks through the limitation of the limited stimulation range of traditional single-channel needle electrodes, but also significantly improves the spatial accuracy, therapeutic effectiveness and safety of deep muscle electrical stimulation through real-time impedance monitoring, multi-channel independent control and flexible stimulation modes, providing an advanced technical solution for neuromuscular function reconstruction and rehabilitation. Attached Figure Description

[0036] Figure 1 This is a diagram of the concentric circle array electrostimulation system of the present invention. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0038] Example 1:

[0039] like Figure 1 The diagram shown is a schematic representation of the concentric circle array electrical stimulation system of the present invention. The system includes: an array needle electrode unit, a multi-channel stimulation generator, a stimulation control module, and a data processing and display unit.

[0040] The array needle electrode unit includes a needle body, a needle handle, and multiple stimulation electrodes; the needle body is disposed at one end of the needle handle, and the multiple stimulation electrodes include a central stimulation electrode and peripheral stimulation electrodes. The central stimulation electrode is located at the central axis of the needle body, and the peripheral stimulation electrodes are arranged in a concentric circle array along the circumference of the needle body shell; each stimulation electrode is connected to the needle handle through an independent insulated wire.

[0041] The number of peripheral stimulation electrodes is 7, and the peripheral stimulation electrodes are distributed at equal angular intervals on the outer shell of the needle body.

[0042] The needle body shell has multiple conductive holes corresponding to the number of stimulation electrodes, and each conductive hole has a conductive contact point. The needle body includes an insulating shell and multiple built-in insulating wires, each of which is connected to a stimulation electrode. The diameter of the conductive contact point is 0.3 mm, and the spacing between adjacent conductive contact points is 2 mm. The conductive contact points are made of medical stainless steel, platinum-iridium alloy, or gold alloy.

[0043] The outer diameter of the needle is 0.45-0.5mm; the effective stimulation length of the needle is 10-20mm; the total length of the needle includes three specifications: 37mm, 50mm, and 75mm; the needle tip adopts a tapered design with a taper angle of 10°-30°. The needle body uses a medical-grade stainless steel insulating shell with a shell thickness of 0.05mm. Eight independent insulated wires are covered with polyimide material, with a single wire diameter of 0.05mm, which can withstand repeated bending without breaking; the conductive contact points are electrochemically polished, with a surface roughness Ra≤0.2μm, reducing impedance.

[0044] The array needle electrode unit also includes a reference electrode, which is disposed on the outer surface of the needle body or on the needle handle to form a stimulation circuit; the reference electrode is a ring electrode or a sheet electrode, and its area is 20-30 times the area of ​​the stimulation electrode.

[0045] The multi-channel stimulation generator is electrically connected to the multiple stimulation electrodes respectively, and is used to independently generate and output multiple electrical stimulation signals.

[0046] The multi-channel stimulation generator includes independent current source units, waveform generation units, and isolation protection units. The independent current source units provide adjustable constant current stimulation output to each stimulation electrode, with an output current range of 0.1-100mA and a current adjustment accuracy of 0.1mA. Each independent current source unit is built based on an operational amplifier and a field-effect transistor, achieving precise current control through a 16-bit digital-to-analog converter (DAC); current settling time is <1μs, and current ripple is <1%.

[0047] The waveform generation unit is used to generate at least one stimulation waveform among rectangular wave, sine wave, triangular wave, sawtooth wave or custom waveform; the stimulation frequency range is 0.1-1000Hz, and the pulse width range is 10μs-10ms; the waveform generation unit adopts direct digital frequency synthesis (DDS) technology, which can generate arbitrary waveforms with a waveform resolution of 12 bits and a sampling rate of up to 100MHz.

[0048] The isolation protection unit provides electrical isolation and overcurrent protection. The electrical isolation adopts opto-isolation or transformer isolation, with an isolation voltage ≥3000V. The overcurrent protection automatically cuts off the output when the output current exceeds the safety threshold. Alternatively, a two-stage isolation method can be used. The first stage of isolation uses a medical-grade optocoupler with an isolation voltage of 2500V and a response time <50ns. The second stage of isolation uses a high-frequency transformer with an isolation voltage of 1000V. The overcurrent protection circuit uses a fast comparator and a solid-state relay with a response time <10μs. When the output current of any channel exceeds 110% of the set threshold, the output of that channel is immediately cut off, and an audible and visual alarm is triggered.

[0049] The stimulation control module is connected to the multi-channel stimulation generator and is used to independently control the stimulation parameters of each stimulation electrode; the stimulation parameters include stimulation intensity, stimulation frequency, pulse width, stimulation waveform, and stimulation duration.

[0050] The data processing and display unit is connected to the stimulation control module and is used to record stimulation parameters, monitor the stimulation process, and display the system's working status.

[0051] The data processing and display unit includes a graphical user interface for displaying the working status of each stimulation channel, stimulation parameter settings, real-time impedance values, and output current waveforms; and provides a visual stimulation position diagram, using color coding to display the activation status of each electrode.

[0052] The system also includes an impedance monitoring unit for real-time monitoring of the contact impedance between each stimulation electrode and the tissue. The impedance monitoring unit uses an AC impedance measurement method with a test frequency of 1-10kHz and a test current of ≤100μA. An alarm is issued when the detected impedance value exceeds the preset range.

[0053] The impedance range of normal tissue is 500-5000Ω. When the impedance of an electrode is below 300Ω, it may indicate a short circuit or puncture of a blood vessel; when the impedance is above 10000Ω, it indicates poor electrode contact or damage to the insulation layer. Therefore, the preset range is set at 300-10000Ω. If the impedance exceeds the preset range, the system will automatically mark the abnormal electrode and display it in red on the user interface to remind the operator to check it.

[0054] For electrodes with impedance within the normal range, the system will automatically adjust the output current according to the impedance value to compensate for differences in tissue impedance and ensure that the voltage actually applied to the tissue by each electrode is relatively consistent.

[0055] The data processing and display unit is developed based on an embedded Linux system and uses a 7-inch capacitive touchscreen with a resolution of 1024×600 pixels. The user interface is divided into four functional areas: the upper left area displays a schematic diagram of the arrangement of eight electrodes, with currently active electrodes highlighted in green, inactive electrodes in gray, and abnormal electrodes in red; the upper right area displays the output current intensity of each channel in real time using a bar graph; the lower left area displays the real-time impedance value of each electrode, presented in both numerical and trend curve formats; and the lower right area displays the current stimulation waveform, allowing users to select any channel for real-time waveform monitoring. The system supports both touch operation and knob adjustment, catering to users with different operating habits.

[0056] In practical applications, the system offers a variety of preset stimulation modes for different treatment goals. For example, for muscle strength training, a rectangular wave with a frequency of 30-50Hz and a pulse width of 200-400μs is recommended, using a synchronous stimulation mode to activate all electrodes. The stimulation intensity should be based on the maximum current that the patient can tolerate, typically 20-60mA. For muscle spasm relief, a rectangular wave with a frequency of 2-5Hz and a pulse width of 100-200μs is recommended, using a sequential stimulation mode, activating electrodes 1-2-3-4-5-6-7-8 in that order, with each electrode lasting 1 second, and a stimulation intensity of 15-30mA. For pain management, a high-frequency pulse with a frequency of 80-100Hz and a pulse width of 50-100μs is recommended, with the stimulation intensity based on the patient's comfortable numbness, typically 10-25mA.

[0057] The system in this embodiment also has a data logging function; the system automatically records detailed parameters for each treatment, including treatment date, time, electrode number used, stimulation parameters of each electrode, impedance change curve, and cumulative stimulation time. The data is stored in standard CSV format and can be exported to a PC for further analysis. This is of great value for evaluating treatment effectiveness and optimizing stimulation parameters. Clinical studies have shown that by analyzing historical data, a personalized stimulation parameter database can be established for each patient, significantly improving treatment outcomes.

[0058] The three needle lengths are suitable for muscle tissue at different depths: the 37mm length is suitable for superficial muscle stimulation, such as the forearm extensor muscles and calf muscles, with an insertion depth of typically 10-15mm; the 50mm length is suitable for medium-depth muscle stimulation, such as the quadriceps and gluteus maximus, with an insertion depth of 15-25mm; and the 75mm length is suitable for deep muscle stimulation, such as the multifidus muscle of the lumbar region and deep rotator muscles, with an insertion depth of up to 30-40mm. The conical design of the needle tip has been optimized: a small 10° cone angle is suitable for dense muscle tissue, offering low puncture resistance but precise positioning; a large 30° cone angle is suitable for soft tissue, allowing for faster puncture speed but potentially affecting precise positioning. In clinical practice, it is recommended to select the appropriate needle tip angle based on the characteristics of the target muscle.

[0059] Example 2:

[0060] This embodiment further discloses the array needle electrode of the present invention, which includes: a needle body, a needle handle, and multiple stimulation electrodes.

[0061] The needle body includes an insulating shell and multiple independent insulating wires disposed within the insulating shell.

[0062] The plurality of stimulation electrodes includes a central stimulation electrode and seven peripheral stimulation electrodes; the central stimulation electrode is located at the central axis of the needle body, and the peripheral stimulation electrodes are evenly distributed in a concentric array along the circumference of the needle body shell; each stimulation electrode is connected to the needle handle end through an independent insulated wire.

[0063] The needle handle is located at the rear end of the needle body, and the needle handle includes multiple independent electrical connection terminals, each of which is connected to a corresponding stimulation electrode.

[0064] The insulating outer shell of the needle body has conductive holes corresponding to the number of stimulation electrodes. Each conductive hole has a conductive contact point, which is electrically connected to the corresponding insulating wire.

[0065] The needle handle is clearly marked with electrode numbers and orientation indicators. The central electrode is marked "C," and the seven surrounding electrodes are marked "1-7" in a clockwise direction. In clinical use, the operator can determine the target location based on ultrasound imaging and then select the appropriate electrode for stimulation. For example, if ultrasound shows the target nerve is located at the 3 o'clock position on the needle body, stimulating electrode 3 will yield the best results.

[0066] In a clinical trial involving 50 patients, the success rate of deep muscle electrical stimulation therapy using the array needle electrode of this invention reached 96%. Among them, 47 patients found the optimal stimulation point after the first insertion and positioning, requiring no adjustment of the needle electrode position; 2 patients required minor adjustments to the needle orientation; and only 1 patient required a longer needle due to their unique body shape. The average pain score (VAS) was 2.3 out of 10, significantly lower than the control group using traditional single-channel needle electrodes (average 4.7). Treatment efficacy evaluation showed that the experimental group using the array needle electrode was superior to the control group in terms of increased muscle strength and improved motor function, with statistically significant differences (p<0.05). These clinical data fully demonstrate the superior performance and practical value of the array needle electrode of this invention.

[0067] Example 3:

[0068] An application of a concentric circle array electrical stimulation system in deep muscle function reconstruction, based on the system implementation of this invention, the method of achieving muscle stimulation using the concentric circle array electrical stimulation system includes:

[0069] The array needle electrodes are inserted into the target deep muscle tissue, and the electrode positions are determined by ultrasound or electromyography guidance.

[0070] The contact impedance of each electrode is measured using the impedance monitoring unit, and the electrode with impedance within the normal range is selected as the stimulation electrode.

[0071] Set stimulation parameters, including stimulation intensity, frequency, and waveform, and use spatial sequence stimulation mode or synchronous stimulation mode to electrically stimulate the target muscle.

[0072] In spatial sequence stimulation mode, the system activates each electrode sequentially according to a preset order. For example, in the "rotational activation" mode, the electrodes are activated cyclically in the order C-1-2-3-4-5-6-7-C, with each electrode activation time being 500ms. This mode can simulate the natural recruitment pattern of muscles, avoiding muscle fatigue caused by continuous strong stimulation of a single location. Another "wave activation" mode groups 2-3 adjacent electrodes together, such as (C,1,2), (1,2,3), (2,3,4), etc., and each group is activated sequentially, producing a stimulation wave effect from the center to the periphery, which more effectively activates a larger range of muscle fibers.

[0073] In synchronous stimulation mode, all normally functioning electrodes simultaneously output stimulation signals, producing maximum stimulation intensity. However, it should be noted that the total current during synchronous stimulation is the sum of the currents of each electrode, which may reach a high level (e.g., if each of the 8 electrodes outputs 30mA, the total current is 240mA).

[0074] The system is equipped with a total current protection limit. When the total current exceeds 200mA, it automatically reduces the output current of each electrode proportionally to ensure safety. The synchronous stimulation mode is suitable for situations requiring strong muscle contractions, such as rehabilitation training for severe muscle atrophy.

[0075] This invention has been described through specific embodiments. Those skilled in the art will understand that various modifications and equivalent substitutions can be made to this invention without departing from its scope. Furthermore, various modifications can be made to this invention for specific situations or materials without departing from its scope. Therefore, this invention is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims.

Claims

1. A concentric circle array electrical stimulation system, characterized in that, The system includes: an array needle electrode unit, a multi-channel stimulator, a stimulation control module, and a data processing and display unit; The array needle electrode unit includes a needle body, a needle handle, and multiple stimulation electrodes. The needle body is disposed at one end of the needle handle. The multiple stimulation electrodes include a central stimulation electrode and seven peripheral stimulation electrodes. The central stimulation electrode is located at the central axis of the needle body, and the peripheral stimulation electrodes are arranged in a concentric circle array along the circumference of the needle body shell. The outer diameter of the needle body is 0.45-0.5 mm. Each stimulation electrode is connected to the needle handle via an independent insulated wire. The needle body shell has multiple conductive holes corresponding to the number of stimulation electrodes, and each conductive hole is provided with a conductive contact point; the needle body includes an insulating shell and multiple built-in insulating wires, each insulating wire being connected to a stimulation electrode; the diameter of the conductive contact point is 0.3 mm, and the spacing between adjacent conductive contact points is 2 mm; the conductive contact points are made of medical stainless steel, platinum-iridium alloy, or gold alloy. The array needle electrode unit also includes a reference electrode, which is disposed on the outer surface of the needle body or on the needle handle to form a stimulation circuit; the reference electrode is a ring electrode or a sheet electrode, and its area is 20-30 times the area of ​​the stimulation electrode. The multi-channel stimulation generator is electrically connected to the multiple stimulation electrodes respectively, and is used to independently generate and output multiple electrical stimulation signals. The multi-channel stimulation generator includes an independent current source unit, a waveform generation unit, and an isolation protection unit. The independent current source unit is used to provide an adjustable constant current stimulation output for each stimulation electrode, with an output current range of 0.1-100mA and a current adjustment accuracy of 0.1mA. The waveform generation unit is used to generate at least one stimulation waveform selected from rectangular waves, sine waves, triangular waves, sawtooth waves, or custom waveforms. The stimulation frequency range is 0.1-1000Hz, and the pulse width range is 10μs-10ms. The isolation protection unit is used to provide electrical isolation and overcurrent protection. The electrical isolation adopts opto-isolation or transformer isolation, with an isolation voltage ≥3000V. The overcurrent protection automatically cuts off the output when the output current exceeds the safety threshold. The system also includes an impedance monitoring unit for real-time monitoring of the contact impedance between each stimulation electrode and the tissue. The impedance monitoring unit employs AC impedance measurement, with a test frequency of 1-10kHz and a test current ≤100μA. An alarm is triggered when the detected impedance value exceeds a preset range. The stimulation control module is connected to the multi-channel stimulation generator and is used to independently control the stimulation parameters of each stimulation electrode; the stimulation parameters include stimulation intensity, stimulation frequency, pulse width, stimulation waveform, and stimulation duration. The data processing and display unit is connected to the stimulation control module and is used to record stimulation parameters, monitor the stimulation process, and display the system's working status.

2. The concentric circle array electrical stimulation system according to claim 1, characterized in that, The peripheral stimulation electrodes are distributed at equal angular intervals on the outer shell of the needle.

3. The concentric circle array electrical stimulation system according to claim 2, characterized in that, The effective stimulation length of the needle body is 10-20mm; the total length of the needle body includes three specifications: 37mm, 50mm and 75mm; the needle tip of the needle body adopts a conical design with a cone angle of 10°-30°.

4. The concentric circle array electrical stimulation system according to claim 3, characterized in that, The data processing and display unit includes a graphical user interface for displaying the working status of each stimulation channel, stimulation parameter settings, real-time impedance values, and output current waveforms; and provides a visual stimulation position diagram, using color coding to display the activation status of each electrode.

5. An array of needle electrodes for use in the system according to any one of claims 1-4, characterized in that, The array needle electrode includes: a needle body, a needle handle, and multiple stimulation electrodes; The needle body includes an insulating shell and multiple independent insulating wires disposed within the insulating shell; The plurality of stimulation electrodes includes a central stimulation electrode and seven peripheral stimulation electrodes; the central stimulation electrode is located at the central axis of the needle body, and the peripheral stimulation electrodes are evenly distributed in a concentric array along the circumference of the needle body shell; each stimulation electrode is connected to the needle handle end through an independent insulated wire. The needle handle is located at the rear end of the needle body, and the needle handle includes multiple independent electrical connection terminals, each of which is connected to a corresponding stimulation electrode. The insulating outer shell of the needle body has conductive holes corresponding to the number of stimulation electrodes. Each conductive hole has a conductive contact point, which is electrically connected to the corresponding insulating wire.

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