CN223287482U - Tibial nerve electrical stimulation system - Google Patents
Tibial nerve electrical stimulation systemInfo
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- CN223287482U CN223287482U CN202422064899.5U CN202422064899U CN223287482U CN 223287482 U CN223287482 U CN 223287482U CN 202422064899 U CN202422064899 U CN 202422064899U CN 223287482 U CN223287482 U CN 223287482U
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Abstract
The embodiment of the application provides a tibial nerve electrical stimulation system which comprises an electrical stimulator and an electrode plate, wherein the electrical stimulator is connected with the electrode plate, the electrical stimulator is used for generating an electrical stimulation signal and transmitting the electrical stimulation signal to the electrode plate, the electrical stimulation signal is a pulse signal with a curve envelope, and the electrode plate is connected with a human body and used for receiving the electrical stimulation signal sent by the electrical stimulator and transmitting the electrical stimulation signal to a tibial nerve.
Description
Technical Field
The embodiment of the application relates to the technical field of medical treatment, in particular to a tibial nerve electrical stimulation system.
Background
In the current electric stimulation scene, the tibial nerve electric stimulation system generally adopts square wave pulse stimulation signals to electrically stimulate a patient, and when the nerve stimulation intensity reaches an effective treatment level, the patient can feel stronger stinging feeling, so that the patient is uncomfortable, the compliance of the therapy is greatly reduced, and the effectiveness of the therapy is reduced.
Disclosure of utility model
The embodiment of the application provides a tibial nerve electrical stimulation system.
The embodiment of the application provides a tibial nerve electrical stimulation system which comprises an electrical stimulator and an electrode plate, wherein the electrical stimulator is connected with the electrode plate,
The electric stimulator is used for generating an electric stimulation signal and transmitting the electric stimulation signal to the electrode plate, wherein the electric stimulation signal is a pulse signal with a curve envelope;
The electrode plate is connected with a human body and is used for receiving the electric stimulation signals sent by the electric stimulator and transmitting the electric stimulation signals to the tibial nerve.
According to the tibial nerve electrical stimulation system provided by the embodiment of the application, the electrical stimulator is used for generating the pulse electrical stimulation signal with the curve envelope, the electrical stimulation signal is transmitted to the tibial nerve through the electrode plate connected with the electrical stimulator, and the stimulation intensity can be gradually increased or decreased by the treatment equipment with higher resolution in the same variation range, so that a patient can adapt to each variation more easily, the patient does not feel sudden strong pain feeling, and the tolerance of the therapy is increased.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
Fig. 1 is a schematic diagram of an electrode pad placement position of an electrical tibial nerve stimulation system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an electrical stimulation signal according to an embodiment of the present application;
Fig. 3 is a schematic structural diagram of an electrical tibial nerve stimulation system according to an embodiment of the present application;
Fig. 4 is a schematic structural diagram of an electrical stimulation signal generating module according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of a constant current module, an H-bridge circuit and an MCU according to an embodiment of the present application;
Fig. 6 is a schematic structural diagram of a boost module according to an embodiment of the present application;
Fig. 7 is a schematic diagram II of an electrical stimulation signal generating module according to an embodiment of the present application;
FIG. 8 is a second schematic diagram of an electrical stimulation signal according to an embodiment of the present application;
Fig. 9 is a schematic structural diagram of an electrical stimulator according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that, in the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist, for example, a and/or B, and may mean that a exists alone, while a and B exist together, and B exists alone. In addition, in the embodiment of the present application, the character "/", generally indicates that the front and rear association objects are in an or relationship.
In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, etc.
In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following description describes related technologies of the embodiments of the present application, and the following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as alternatives, which all belong to the protection scope of the embodiments of the present application.
As shown in fig. 1, fig. 1 is a schematic diagram of an electrode pad placement position of a tibial nerve electrical stimulation system according to an embodiment of the present application, where positions of an electrode pad 1 and an electrode pad 2 respectively correspond to a calf portion tibial nerve position or an ankle portion tibial nerve branch position. The tibial nerve stimulating electric signal is generated by an electric stimulator and then transmitted to an electrode plate attached to the corresponding direction of the tibial nerve by a lead wire to be uploaded to the tibial nerve.
Because the tibial nerve contains the nerve fibers of L4-S3, and the nerve fibers which innervate the bladder and the pelvic floor originate from the same spinal cord segment, the afferent activities of the bladder are inhibited by stimulating the afferent components of the body, abnormal signals are blocked from being transmitted to the spinal cord and the brain, and the 'neuromodulation' is realized, so that the overactive bladder can be treated.
Fig. 2 is a schematic diagram of an electrical stimulation signal provided by the embodiment of the present application, as shown in fig. 2, the electrical stimulation signal is a square wave pulse, the parameter is 20Hz frequency (corresponding to a period of 50 ms), the pulse width is 200us, and when the nerve stimulation intensity reaches an effective treatment level, a patient can feel stronger tingling sensation, so that the patient generates uncomfortable feeling, the compliance of the treatment of the patient is affected, and the treatment effect is affected.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an electrical tibial nerve stimulation system provided by an embodiment of the present application, as shown in fig. 3, the electrical tibial nerve stimulation system includes an electrical stimulator and an electrode pad, where the electrical stimulator is connected with the electrode pad,
The electric stimulator is used for generating an electric stimulation signal and transmitting the electric stimulation signal to the electrode plate, wherein the electric stimulation signal is a pulse signal with a curve envelope;
The electrode plate is connected with a human body and is used for receiving the electric stimulation signals sent by the electric stimulator and transmitting the electric stimulation signals to the tibial nerve.
The electrode plate is placed on a tibial nerve stimulation point of a human body, and is electrically stimulated by a pulse electrical stimulation signal with a curve envelope, so that the stimulation intensity can be gradually increased or reduced in a smaller amplitude range, the pain of a patient is reduced, and the treatment effect is improved.
Illustratively, the electrostimulator includes an electrostimulation signal generating module for generating a pulse signal with a curvilinear envelope.
Example 1
Referring to fig. 4, fig. 4 is a schematic structural diagram of an electrical stimulation signal generating module according to an embodiment of the present application, where the electrical stimulation signal generating module includes a constant current module, a microcontroller MCU, and an H-bridge circuit. The constant current module is used for providing stable current for the H-bridge circuit, and the MCU is used for controlling the H-bridge circuit to output pulse signals with curve envelopes.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a constant current module, an H-bridge circuit and an MCU according to an embodiment of the present application, where, as shown in fig. 5, the H-bridge circuit includes Metal-Oxide-semiconductor field effect transistors (MOSFETs) Q2, Q3, Q4, and Q5, and gates of the MOSFETs are respectively connected to the MCU and used for receiving control signals SW1, SW2, SW3, SW4, Q2, Q3, Q4, and Q5 sent by the MCU, respectively corresponding to the control signals SW1, SW2, SW3, and SW4, and sources of the Q2 are connected to one electrode after being connected to drains of the Q3, and sources of the Q4 are connected to another electrode after being connected to drains of the Q5. The two electrodes are connected with the human body.
The constant current module comprises an operational amplifier U3.1, a resistor RS1, a capacitor U4, a resistor RS3 and a resistor RS2, and is provided with a 5V voltage stabilizing direct current power supply operational amplifier, wherein a DAC is connected with a positive input end of the operational amplifier, a negative end of the operational amplifier is a corresponding Iout feedback signal and a collector electrode of a triode Q6, and a collector electrode of the triode Q6 is connected with an H bridge circuit, wherein the base current of the triode Q6 is regulated through feedback information of the operational amplifier, so that the effect of regulating output current is achieved, and stable current output can be ensured when the H bridge switches and outputs complex envelope waveforms.
Illustratively, taking the case of forward voltage generation as an example, the drain of MOSFET Q2 and the drain of MOSFET Q5 are turned on and then connected to a high voltage output, and the resulting output is contacted with the user via the body surface electrode to form a path (defined as forward voltage). Similarly, the drain of MOSFET Q3 and the drain of MOSFET Q4 are turned on and then connected to a high voltage output, and the resulting output is brought into contact with the user via the body surface electrode to form a path (defined as a reverse voltage). Thus, the MCU can control the on-off of Q2, Q4, Q3 and Q5 by the control signals SW1, SW2, SW3 and SW4 so that the H-bridge circuit generates a pulse signal with a curved envelope. Illustratively, when Q2 and Q5 are on and Q3 and Q4 are off, current flows in a forward direction from the load. When Q3 and Q4 are on and Q2 and Q5 are off, current flows in reverse from the load. According to this principle, different waveforms can be generated by repeatedly controlling on-off.
Based on the above, in an alternative embodiment of the application, the electric stimulator comprises an electric stimulation signal generating module, wherein the electric stimulation signal generating module comprises a constant current module, a microcontroller MCU and an H-bridge circuit,
The constant current module is connected with the H-bridge circuit and is used for providing current for the H-bridge circuit;
the MCU is connected with the H-bridge circuit and used for sending a control signal to the H-bridge circuit, and the control signal is used for controlling the H-bridge circuit to generate the electric stimulation signal.
In an optional embodiment of the present application, the electrical stimulation signal generating module further includes a sampling module;
The sampling module is connected with the H-bridge circuit and the MCU, and is used for collecting working parameters of the H-bridge circuit to obtain a sampling signal and sending the sampling signal to the MCU;
The MCU is used for receiving the sampling signal and adjusting the control signal according to the sampling signal.
The operating parameters of the H-bridge circuit here include current and/or voltage.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a boost module provided by an embodiment of the present application, as shown in fig. 6, in this embodiment, the boost module includes a boost power supply VBAT, a transformer Lp, a capacitor C1, an inductor U1, a diode D2, a diode D1, a transistor Q1, a PWM power supply, a diode D3, an electrolytic capacitor C2, and a capacitor U2, where one ends of U2, C2, and D3 are connected and then connected to an H-bridge circuit in an electrical stimulation signal generating module, so as to provide a voltage required for generating an electrical stimulation signal for the electrical stimulation signal generating module, and enhance the electrical stimulation signal strength.
Based on the above, in the embodiment of the present application, the electrical stimulator further includes a boost module, where the boost module is connected to the electrical stimulation signal generating module, and is used to enhance the electrical stimulation signal strength.
Example two
Referring to fig. 7, fig. 7 is a schematic diagram of a second structure of an electrical stimulation signal generating module according to an embodiment of the present application, where the electrical stimulation signal generating module includes a pulse signal generating module, an envelope signal generating module, and a modulating module, where the pulse signal generating module is connected with the modulating module, and the envelope signal generating module is connected with the modulating module;
the pulse signal generation module is used for generating a pulse signal and sending the pulse signal to the modulation module;
The envelope signal generation module is used for generating a curve envelope signal and transmitting the curve envelope signal to the modulation module;
the modulation module is used for receiving the pulse signal and the curve envelope signal, modulating the pulse signal and the curve envelope signal to generate an electric stimulation signal, wherein the electric stimulation signal is a pulse signal with a curve envelope.
In the embodiment of the application, the pulse signals comprise matrix pulse signals.
In practical application, the matrix pulse signals are adopted to perform the electrical tibial nerve stimulation, so that the treatment effect is better.
In an embodiment of the application, the curve envelope signal comprises one or more of a sine envelope signal and a cosine envelope signal. In practical applications, other curve envelope signals may be used, which is not limited in the embodiment of the present application.
Illustratively, referring to fig. 2, in the embodiment of the present application, the period of the pulse signal is 50ms, and the width of a single pulse is 200us.
Illustratively, the pulse signal is taken as a matrix pulse signal, the envelope signal is taken as a sinusoidal envelope signal, the matrix pulse signal has a frequency of 20Hz and a period of 50ms. The pulse width is 200 mus, and the pulse signal can be expressed by a unit pulse function, such as: where T is the period, τ is the pulse width, and the square wave signal s (T) can be expressed as: The sinusoidal envelope signal has a frequency of 2Hz and a period of 0.5 seconds, and may be expressed as e (t) =asin (2pi ft) =asin (4pi t), where f corresponds to a frequency of 2Hz, a is the amplitude of the envelope, and t is time. The modulated signal m (t) is the mathematical product of the square wave array s (t) and the sinusoidal envelope e (t), expressed in particular as:
Referring to fig. 8, fig. 8 is a schematic diagram of an electrical stimulation signal provided by an embodiment of the present application, and the electrical stimulation signal shown in fig. 8 is a matrix pulse signal modulated by a sinusoidal envelope signal.
The curve envelope signal can adopt a periodic signal, and the user can have more obvious electric stimulation intensity change feeling by selecting lower frequency. Based on this, in the embodiment of the present application, the curve envelope signal is a periodic curve envelope signal, and the frequency of the curve envelope signal is less than or equal to 2Hz.
The pulse signal generating module comprises one or more of a pulse signal generating circuit, a phase-locked loop (PLL) and a function generating circuit.
The pulse signal generating circuit includes a crystal oscillator circuit, a timer chip and an MCU, wherein the crystal oscillator in the crystal oscillator circuit generates a stable high-frequency oscillation signal as a reference clock signal through a piezoelectric effect, the corresponding MCU is configured in a steady-state multivibrator mode, and generates a corresponding pulse signal through mounting a corresponding external resistor and capacitor on the circuit, and the stable pulse sequence is generated by using the PLL circuit to obtain the pulse signal, and the pulse sequence is generated by plotting a function value Point by Point in a function generating circuit, calculating and storing the amplitudes at a specific time Point, and then reading and outputting the amplitudes Point by Point at output. For a periodic pulse signal, all points in a period are calculated and stored in advance, and then the points are cyclically output to obtain a pulse signal.
Based on the above, in an alternative embodiment of the present application, the pulse signal generating circuit includes a crystal oscillator circuit, a timer chip and an MCU.
In practical application, other ways of generating the pulse signal may be adopted, which is not limited in the embodiment of the present application.
In the embodiment of the application, the envelope signal generation module comprises one or more of an oscillator circuit, a microcontroller (Microcontroller Unit, MCU), a Direct Digital Synthesizer (DDS), a Phase-Locked Loop (PLL) and a function generation circuit.
The oscillator circuit may be an RC oscillator circuit, which corresponds to a resistor and capacitor oscillator circuit, wherein when the capacitor is charged by the resistor, the voltage of the capacitor increases with time, and conversely, when the capacitor is discharged by the resistor, the internal voltage of the capacitor decreases, the sine wave is output by controlling the charging and discharging time sequence, the MCU can pre-calculate the sample points of the sine wave, store the sample points in an array, output the sample points at regular time by using a timer, output the analog signal by a DAC, the MCU can also calculate the sample points, output the duty ratio modulated signal by PWM, then convert the PWM signal into the analog sine wave signal by a low pass filter, the DDS IC generates an accurate sine wave envelope signal by a lookup table and a digital-to-analog converter (DAC), generate the sine wave envelope signal synchronous with the pulse signal by using a PLL circuit, generate the waveform by plotting function values Point by Point in a function generating circuit, calculate and store the sample points, and then read and output the waveform amplitude values at specific time points. For a periodic sine wave, all points in a period are calculated and stored in advance, and then the points are output in a loop to obtain a sine wave envelope signal.
In practical applications, the curve envelope signal may be generated in other manners, which is not limited in this embodiment of the present application.
In practical application, since the pulse matrix has a specific output frequency, the analog switch is required to control the on-off of the pulse signal, and the sine wave signal is required to control the on-time of the switch. Only at the on-time can the corresponding modulation signal enter the modulation module.
In the embodiment of the application, the modulation module comprises an analog multiplier chip.
The analog multiplier chip comprises a first input end, a second input end and a first output end, wherein the first input end is connected with the pulse signal generating module and used for receiving a pulse signal sent by the pulse signal generating module, the second input end is connected with the envelope signal generating module and used for receiving a curve envelope signal sent by the envelope signal generating module, and the first output end is used for outputting an electric stimulation signal with a curve envelope.
The modulation module may be implemented by using an analog multiplier chip, and may multiply a pulse signal with a curve envelope signal, so as to implement amplitude modulation, and the multiplier chip may specifically use an AD633, and its main function is implemented by using a plurality of internal operational amplifiers and a resistor network, where the connection form of the power amplifiers determines an operational rule of an input signal (such as 2 signals multiplying, or more input signals), and is used in combination with the resistor network to set weighting and adjustment of the input signal, so as to implement multiplication operation. The output signal of the multiplier chip is a pulse signal with a sine wave envelope.
In practical application, the modulation module may also use other circuits, which is not limited in the embodiment of the present application.
Referring to fig. 9 in the embodiment of the present application, fig. 9 is a schematic structural diagram of an electrical stimulator provided in the embodiment of the present application, where the electrical stimulator further includes a boost module, where the boost module is connected to a modulation module in the electrical stimulation signal generating module, and the boost module is used to enhance the electrical stimulation signal strength.
After the modulation module generates the envelope stimulus signal, the signal strength is pulled up by the boost module to reach the stimulus level of the transcutaneous electrical stimulus, and the boost module may employ a boost converter, for example.
The circuit of the boost converter comprises the following key components of a boost power supply, a switching element, a diode, an energy storage inductor and a capacitor.
The switching element may be, for example, a MOSFET, which is mainly responsible for periodically switching on and off a current, and for regulating the transfer of energy by controlling the switching of the switch. The specific flow is that MOSFET is conducted, the input power voltage flows through the inductor, the current in the inductor is gradually increased, and the inductor stores energy to rise. At this time, current cannot flow to the output terminal because the diode is reverse biased. During discharge, the MOSFET is turned off and the current in the inductor cannot continue to flow to the MOSFET, so the current of the inductor flows through the diode to the output capacitor. The energy stored in the inductor is released to push the voltage in the capacitor to rise, so that the boost conversion is realized. Meanwhile, in order to achieve stable boosting, the switching frequency and the duty ratio of the MOSFET can also be adjusted by a feedback circuit.
According to the tibial nerve electrical stimulation system provided by the embodiment of the application, the generated electrical stimulation signals have high-resolution change gear, each patient has different tolerance to the stimulation intensity, the high-resolution gear change can be more accurately adjusted to the optimal treatment intensity suitable for an individual, personalized comfortable treatment experience is provided, the tibial nerve electrical stimulation system provided by the embodiment of the application can gradually increase or decrease the stimulation intensity with higher resolution in the same change amplitude, the gradual and smooth intensity change can obviously reduce uncomfortable feeling caused by mutation, so that the patient can adapt to each change more easily without feeling abrupt strong pain, the resistant psychology of the patient in the treatment process is reduced, and the tolerance of the therapy is increased.
According to the tibial nerve electrical stimulation system provided by the embodiment of the application, the electrode plate is arranged on the tibial nerve stimulation point of the skin of the user, and the electrode plate is connected with the electrical stimulator through a lead and is used for applying the electrical stimulation signal generated by the electrical stimulator to the corresponding stimulation point to perform electrical stimulation treatment.
In the several embodiments provided in the present application, it should be understood that the disclosed system and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The tibial nerve electrical stimulation system comprises an electrical stimulator and an electrode slice, wherein the electrical stimulator is connected with the electrode slice,
The electric stimulator is used for generating an electric stimulation signal and transmitting the electric stimulation signal to the electrode plate, wherein the electric stimulation signal is a pulse signal with a curve envelope;
The electrode plate is connected with a human body and is used for receiving the electric stimulation signals sent by the electric stimulator and transmitting the electric stimulation signals to the tibial nerve.
2. The tibial nerve electrical stimulation system of claim 1, wherein the electrical stimulator comprises an electrical stimulation signal generation module comprising a constant current module, a microcontroller MCU, and an H-bridge circuit, wherein,
The constant current module is connected with the H-bridge circuit and is used for providing current for the H-bridge circuit;
the MCU is connected with the H-bridge circuit and used for sending a control signal to the H-bridge circuit, and the control signal is used for controlling the H-bridge circuit to generate the electric stimulation signal.
3. The tibial nerve electrical stimulation system of claim 2, wherein said electrical stimulation signal generation module further comprises a sampling module;
The sampling module is connected with the H-bridge circuit and the MCU, and is used for collecting working parameters of the H-bridge circuit to obtain a sampling signal and sending the sampling signal to the MCU;
The MCU is used for receiving the sampling signal and adjusting the control signal according to the sampling signal.
4. The tibial nerve electrical stimulation system of claim 1, wherein the electrical stimulator comprises an electrical stimulation signal generation module, wherein the electrical stimulation signal generation module comprises a pulse signal generation module, an envelope signal generation module and a modulation module, wherein the pulse signal generation module is connected with the modulation module, and the envelope signal generation module is connected with the modulation module;
the pulse signal generation module is used for generating a pulse signal and sending the pulse signal to the modulation module;
The envelope signal generation module is used for generating a curve envelope signal and transmitting the curve envelope signal to the modulation module;
The modulation module is used for receiving the pulse signal and the curve envelope signal, modulating the pulse signal and the curve envelope signal and generating the electric stimulation signal.
5. The tibial nerve stimulation system of claim 4 wherein,
The curvilinear envelope signal comprises one or more of a sinusoidal envelope signal and a cosine envelope signal.
6. The tibial nerve stimulation system of claim 4 wherein,
The envelope signal generation module comprises one or more of an oscillator circuit, an MCU, a direct digital synthesizer DDS, a phase-locked loop PLL and a function generation circuit.
7. The tibial nerve stimulation system of claim 4 wherein,
The pulse signal generating module comprises one or more of a pulse signal generating circuit, a phase-locked loop (PLL) and a function generating circuit.
8. The tibial nerve stimulation system of claim 4 wherein,
The modulation module comprises an analog multiplier chip.
9. The tibial nerve stimulation system of any one of claims 2-8, wherein said electrical stimulator further comprises a boost module;
The boosting module is connected with the electric stimulation signal generating module and used for enhancing the intensity of the electric stimulation signal.
10. The tibial nerve stimulation system of claim 9, wherein the boost module comprises a boost power source, a switch, a diode, a capacitor, and an inductor.
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| CN202422064899.5U CN223287482U (en) | 2024-08-23 | 2024-08-23 | Tibial nerve electrical stimulation system |
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| CN202422064899.5U CN223287482U (en) | 2024-08-23 | 2024-08-23 | Tibial nerve electrical stimulation system |
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