CN210612698U - Wearable wireless intelligent tibial posterior nerve electrical stimulation system - Google Patents
Wearable wireless intelligent tibial posterior nerve electrical stimulation system Download PDFInfo
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- CN210612698U CN210612698U CN201920715640.9U CN201920715640U CN210612698U CN 210612698 U CN210612698 U CN 210612698U CN 201920715640 U CN201920715640 U CN 201920715640U CN 210612698 U CN210612698 U CN 210612698U
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Abstract
The utility model discloses a wearable wireless intelligent tibialis posterior nerve electrical stimulation system, including stimulator and the mobile terminal unit with stimulator communication, MCU logic control unit control lithium cell's charge-discharge, control nonvolatile memory cell carries out information storage, control temperature measurement unit carries out the body surface temperature detection at amazing position, the instruction of control state pilot lamp, control bluetooth low energy unit carries out radio communication, control button interaction unit is mutual, control DAC unit produces specific analog voltage, control high pressure BOOST circuit is opened or is closed, indirect control constant current source circuit is opened or is closed, waveform modulation circuit and through the output of electrode connecting unit, and to amazing position body surface impedance survey and overcurrent protection. The utility model stimulates the current to flow through the Sanyinjiao acupoint and the posterior tibial nerve, thereby generating electric pulse between the nerves of the spinal cord, improving the detrusor contraction and the bladder fullness sense of the patient, and further achieving the treatment and improving OAB symptoms.
Description
Technical Field
The utility model belongs to medical treatment electron field relates to a wearable wireless intelligent tibialis posterior nerve electrical stimulation system.
Background
Overactive Bladder (OAB) is defined by the international urinary control society as a syndrome characterized by urgency, often accompanied by frequency and nocturia, with or without urge incontinence, without urinary tract infection or other well-defined pathological changes. OAB may manifest urokinetically as detrusor overactivity, as well as other forms of urethro-bladder dysfunction. The pathogenesis of OAB is complex, the urination process is controlled by higher nerve centers (such as cerebral cortex, pons and spinal cord) and peripheral nervous systems (autonomic nerves and somatic nerves), and the sensory nerves of the lower urinary tract also participate in the regulation of urination. Any of the above-mentioned site dysfunction may cause OAB, and different pathophysiological mechanisms may cause similar symptoms. Common features of OAB include significant elevation of intravesical pressure during small amounts of filling, enhanced detrusor activity, tonic contraction, reduced threshold for stimulation, ultrastructural changes in smooth muscle cells, and the like. The OAB affects the social activities, the traveling, the sleep quality and the like of the patients, seriously reduces the life quality of the patients, and has long course of disease and high continuous cost.
Currently, conservative treatments for overactive bladder include mainly behavioral therapy and anticholinergic medication. Anticholinergic drugs achieve therapeutic effects by antagonizing M receptors to inhibit detrusor contraction during the storage period, and the commonly used drugs include tolterodine, oxybutynin, and the like. Despite the selection of bladder training and drug therapy, it is still statistically impossible for 40% of patients to obtain satisfactory therapeutic effects, and minimally invasive or surgical treatment is required. Thus, effective, convenient treatment means can be more acceptable to patients.
Practical contents
The utility model aims at providing a stimulation current flows through the Sanyinjiao acupoint and the posterior tibial nerve, thereby generating electric pulse between the nerves of the spinal cord, improving the detrusor contraction and the bladder fullness sense of the patient, and further achieving the treatment and improving the OAB symptom. Simple, effective, low-cost, minimally invasive/noninvasive neuromodulation and has better curative effect on overactive bladder.
In order to realize the purpose, the technical scheme of the utility model is as follows: a wearable wireless intelligent posterior tibial nerve electrical stimulation system comprises a stimulator and a mobile terminal unit communicated with the stimulator, wherein,
the stimulator comprises an MCU (microprogrammed control unit) logic control unit, a lithium battery unit, a wireless charging unit, a USB (universal serial bus) charging unit, a nonvolatile storage unit, a temperature measuring unit, a status lamp indicating unit, a low-power-consumption Bluetooth unit, a key interaction unit, a high-voltage BOOST (basic operating system) circuit, a negative voltage circuit, a high-voltage floating ground operational amplifier circuit, a constant current source circuit, a DAC (digital-to-analog converter) unit, a waveform modulation circuit, an electrode connecting unit, an impedance measuring unit and an overcurrent and overload protection circuit; the MCU logic control unit controls the charging and discharging of the lithium battery unit, controls the nonvolatile storage unit to store information, controls the temperature measuring unit to detect the body surface temperature of the stimulation part, controls the indication of the state indicator lamp, controls the low-power-consumption Bluetooth unit to carry out wireless communication, controls the key interaction unit to carry out interaction, controls the DAC unit to generate specific analog voltage, controls the high-voltage BOOST circuit to be switched on or switched off, indirectly controls the constant current source circuit to be switched on or switched off, controls the waveform modulation circuit to output through the electrode connecting unit, and measures the body surface impedance of the stimulation part and protects overcurrent and overload;
the lithium battery unit is respectively connected with the wireless charging unit, the USB charging unit and the high-voltage BOOST circuit, and comprises a lithium battery, a battery protection circuit and a 3.3V voltage stabilizing circuit;
the nonvolatile storage unit is used for storing an initial stimulation scheme and a stimulation parameter value after each adjustment, and storing power failure data;
the temperature measuring unit is used for acquiring the body surface temperature of the electrical stimulation part of the posterior tibial nerve epidermis and monitoring the temperatures of the coil and the battery in the wireless charging process;
the status lamp indicating unit comprises at least two status lamps, and is used for specifying the function status of the stimulator, including stimulation output status indication, Bluetooth connection status indication, stimulation fault status indication and battery low-voltage status indication;
the low-power consumption Bluetooth unit is used for information interaction between the stimulator and the mobile terminal unit;
the mobile terminal unit is connected with the low-power-consumption Bluetooth unit, and data receiving and sending and information statistics between the mobile terminal unit and the stimulator are established;
the key interaction unit comprises at least three keys, is arranged on the stimulator panel and is used for carrying out stimulator parameter regulation and control and function setting;
the high-voltage BOOST circuit BOOSTs the output voltage of the lithium battery to 36V or above and supplies power for the high-voltage floating ground operational amplifier circuit;
the negative voltage circuit reduces the voltage of 36V or more to 5V to supply power for the high-voltage floating ground operational amplifier circuit;
the high-voltage floating ground operational amplifier circuit is an operational amplifier circuit powered by a high-voltage BOOST circuit and a negative voltage circuit, and operates in a floating state;
the constant current source circuit comprises a multistage operational amplifier and a Darlington transistor, and is linearly adjustable;
the DAC unit is a DAC circuit arranged in or outside the MCU logic control unit and provides reference voltage of the constant current source circuit and reference voltage of the overcurrent and overload protection circuit;
the waveform modulation circuit adjusts the current signal output by the constant current source circuit into different stimulation waveforms, including positive and negative symmetrical square waves, triangular waves and asymmetrical exponential waves;
the electrode connecting unit comprises a cathode electrode and an anode electrode, and guides the output waveform of the waveform modulation circuit to the cathode electrode and the anode electrode, wherein the cathode electrode acts on the posterior tibial trunk, the anode electrode forms an electric signal reference loop, and the body surface signal of the posterior tibial nerve is conducted to the impedance measuring unit;
the impedance measuring unit is used for measuring the body surface impedance at the position of the posterior tibial nerve before electrical stimulation and monitoring the connection condition of the electrodes in the stimulation process;
the overcurrent and overload protection circuit monitors the amplitude of the stimulation signal output by the waveform modulation circuit in the stimulation process and feeds the amplitude back to the MCU logic control unit for output adjustment.
Preferably, the wireless charging unit wirelessly charges the lithium battery in a short-distance induction wireless charging or field resonance mode.
Preferably, the USB charging unit and the external medical power adapter are connected to the lithium battery unit through a Micro-USB or Mini-USB or a TypeC-USB to charge the lithium battery.
Preferably, the bluetooth low energy unit adopts BLE4.0-BLE5.0 bluetooth low energy communication.
Preferably, the mobile terminal unit is a mobile phone or a tablet computer running on an Android or IOS system platform.
Preferably, the nonvolatile memory cell includes an EEPROM or a FRAM.
Preferably, the temperature measuring unit includes a micro thermocouple.
Preferably, the negative voltage circuit comprises a TLV431 chip.
Preferably, the electrode connection unit guides the output waveform to the cathode electrode and the anode electrode through a snap structure.
Preferably, the cathode electrode is circular and has a current density of less than 2mA/cm2。
Compared with the prior art, this practical beneficial effect includes at least:
1. small volume, light weight, beautiful and convenient wearing;
2. the use scene is rich and flexible, the device can be used in light exercise states such as office environment, rest environment and walking, and daily activities are not affected;
3. the gel electrode in the electrode connecting unit adopts a snap fastener structure, the electrode can be disassembled and can be washed for multiple times, in order to improve the reliability of the electrode connection, the electrode connecting unit comprises a transparent adhesive tape, so that the electrode and the stimulator can be conveniently fixed at the position of the three-yin crossing, and the stimulator is not easy to fall off even when walking or moving;
4. the cathode electrode is a stainless steel electrode, the current density is less than 2, the gel component around the stainless steel electrode is not connected with the stimulator circuit and only plays a role of fixing, the anode electrode is in a whole sheet shape, and the current density is less than 2 when an electric signal is constructed to flow through a loop;
5. the wireless charging and UBS connection charging are realized, so that the use scenes of users are greatly enriched;
6. the stimulator is internally provided with a BLE4.0-BLE5.0 low-power consumption Bluetooth module, a matched control APP can run on Android or IOS mobile phones and tablet computers with BLE hardware conditions, and meanwhile, the stimulator selects a low-power consumption logic controller, so that the power consumption is further reduced, and the cruising ability of the lithium battery is improved;
7. the skin electrical impedance of the surface layer of the posterior tibial nerve of the patient can be measured, reference is provided for setting the upper limit of the stimulating current, and meanwhile, whether the electrode connection is reliable or not can be judged through an algorithm, and if the electrode connection is disconnected, a user is prompted in time;
8. the system is internally provided with various stimulation waveforms, such as square waves, triangular waves, sine waves, exponential waves and the like, and a user can select the stimulation waveforms according to the self experience effect;
9. the frequency conversion point and the time gap can be freely configured, such as Freq 1-Freq 2-Freq 3-Freq 4-Freq 1, so that a better treatment effect is provided for a user;
10. the MCU logic control unit can cut off the high-voltage BOOST circuit and the negative voltage circuit at the highest priority level when the stimulator fails, cut off the constant current source circuit and push corresponding warning information to the mobile terminal unit;
11. the mobile terminal unit supports big data statistical analysis, can draw the treatment times and treatment duration of a user in a certain time period, generates a trend graph, a bar graph or a pie graph and the like, and guides the patient to better perform stimulation training;
12. the mobile terminal unit supports alarm clock reminding and treatment timing functions, a user can set the alarm clock reminding to prevent forgetting treatment, and the user can set the treatment duration of each time, such as 30 minutes or 1 hour.
Drawings
Fig. 1 is a block diagram of a wearable wireless intelligent posterior tibial nerve electrical stimulation system according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating the use of a wearable wireless smart posterior tibial electrical stimulation system according to an embodiment of the present invention;
fig. 3 is a schematic stimulation diagram of a wearable wireless intelligent posterior tibial nerve electrical stimulation system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electrode connection unit of the wearable wireless intelligent posterior tibial nerve electrical stimulation system according to an embodiment of the present invention;
fig. 5 is an electrical stimulation waveform diagram of the wearable wireless smart posterior tibial nerve electrical stimulation system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
On the contrary, the present application is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the present application as defined by the appended claims. Furthermore, in the following detailed description of the present application, certain specific details are set forth in order to provide a better understanding of the present application. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
Referring to fig. 1-5, a block diagram, a usage diagram, a stimulation diagram, a structural diagram of an electrode connection unit, and an electrical stimulation waveform diagram of a wearable wireless intelligent posterior tibial nerve electrical stimulation system according to an embodiment of the present invention are shown, including a stimulator 10 and a mobile terminal unit 20 in communication with the stimulator 10, wherein,
the stimulator 10 comprises an MCU logic control unit 100, a lithium battery unit 101, a wireless charging unit 102, a USB charging unit 103, a nonvolatile storage unit 104, a temperature measuring unit 105, a status light indicating unit 106, a low power consumption Bluetooth unit 107, a key interaction unit 108, a high-voltage BOOST circuit 109, a negative voltage circuit, a high-voltage floating ground operational amplifier circuit 112, a constant current source circuit 113, a DAC unit 114, a waveform modulation circuit 115, an electrode connection unit 116, an impedance measuring unit 117 and an overcurrent and overload protection circuit 118; the MCU logic control unit 100 controls the charging and discharging of the lithium battery unit 101, controls the nonvolatile storage unit 104 to store information, controls the temperature measurement unit 105 to detect the body surface temperature of a stimulation part, controls the indication of a state indicator lamp, controls the low-power-consumption Bluetooth unit 107 to perform wireless communication, controls the key interaction unit 108 to perform interaction, controls the DAC unit 114 to generate a specific analog voltage, controls the high-voltage BOOST circuit 109 to be opened or closed, indirectly controls the constant current source circuit 113 to be opened or closed, controls the waveform modulation circuit 115 to output through the electrode connection unit 116, and measures the body surface impedance of the stimulation part and protects overcurrent and overload;
the lithium battery unit 101 is respectively connected with the wireless charging unit 102, the USB charging unit 103 and the high-voltage BOOST circuit 109, and the lithium battery unit 101 comprises a lithium battery, a battery protection circuit and a 3.3V voltage stabilizing circuit;
the nonvolatile storage unit 104 is used for storing an initial stimulation scheme and a stimulation parameter value after each adjustment, and storing power failure data;
the temperature measuring unit 105 collects the body surface temperature of the skin electrical stimulation part of the posterior tibial nerve 119, and the temperature of a coil and a battery in the process of stimulation protection and wireless charging monitoring;
the status light indicating unit 106 includes at least two status lights for specifying the functional status of the stimulator 10, including a stimulation output status indication, a bluetooth connection status indication, a stimulation failure status indication, and a battery low voltage status indication;
the low power consumption bluetooth unit 107 is used for information interaction between the stimulator 10 and the mobile terminal unit 20;
the mobile terminal unit 20 is connected with the low-power Bluetooth unit 107, and establishes data receiving and sending and information statistics with the stimulator 10;
the key interaction unit 108 comprises at least three keys, is arranged on the panel of the stimulator 10, and is used for regulating and controlling parameters and setting functions of the stimulator 10;
the high-voltage BOOST circuit 109 BOOSTs the output voltage of the lithium battery to 36V or more, and supplies power for the high-voltage floating ground operational amplifier circuit 112;
the negative voltage circuit reduces the voltage of 36V or more to 5V to supply power for the high-voltage floating ground operational amplifier circuit 112;
the high-voltage floating ground operational amplifier circuit 112 is an operational amplifier circuit which is powered by the high-voltage BOOST circuit 109 and the negative-voltage circuit, and the operational amplifier works in a floating state;
the constant current source circuit 113 comprises a multistage operational amplifier and a Darlington transistor, and is linearly adjustable;
the DAC unit 114 is a DAC circuit inside or outside the MCU logic control unit 100, and provides a reference voltage of the constant current source circuit 113 and a reference voltage of the overcurrent and overload protection circuit 118;
the waveform modulation circuit 115 adjusts the current signal output by the constant current source circuit 113 into different stimulation waveforms, including positive and negative symmetrical square waves, triangular waves and asymmetrical exponential waves;
the electrode connection unit 116 includes a cathode electrode 1161 and an anode electrode 1162, and guides the output waveform of the waveform modulation circuit 115 to the cathode electrode 1161 and the anode electrode 1162, wherein the cathode electrode 1161 acts on the trunk of the posterior tibial nerve 119, the anode electrode 1162 forms an electrical signal reference loop, and conducts the body surface signal at the posterior tibial nerve 119 to the impedance measurement unit 117;
the impedance measuring unit 117 is used for measuring the body surface impedance at the position of the posterior tibial nerve 119 before electrical stimulation and monitoring the electrode connection condition in the stimulation process;
the overcurrent and overload protection circuit 118 monitors the amplitude of the stimulation signal output by the waveform modulation circuit 115 during the stimulation process, and feeds the amplitude back to the MCU logic control unit 100 for output adjustment.
Through the arrangement, the posterior tibial nerve 119 at the position of the Sanyinjiao acupoint is stimulated through the modulation current signal, the posterior tibial nerve 119 extends upwards from the posterior tibial edge to the sacral plexus and is communicated with holes of the sacral 1 nerve S1, the sacral 2 nerve S2, the sacral 3 nerve S3 and the sacral 4 nerve S4 shown in the figure 3, so that the stimulation of the posterior tibial nerve 119 and the direct stimulation of the sacral nerve are realized, and the regulation and control of overactive bladder are realized by the same way. Compared with the traditional electrical stimulator, the portable sacral nerve stimulation device has the advantages of small volume, portability and flexible use scene, is more suitable for use in daily life, and is particularly suitable for patient groups seeking oral drug substitutes, patient groups who like treatment at home or in offices, patient groups who do not reach implanted sacral nerve regulation and patient groups seeking lower economic cost.
The lithium battery unit 101 of the utility model provides power supply for the MCU logic control unit 100, the high-voltage BOOST circuit 109 and the negative voltage circuit, the battery can be charged wirelessly or through USB when the voltage is low, several stimulation parameter templates are built in the stimulator 10 when leaving factory in the nonvolatile storage unit 104, and when the user has no Bluetooth connection condition, parameter regulation and function selection can be performed through the key interaction unit 108; when in normal use, the mobile terminal unit 20 is used for parameter setting and stimulation template selection; the utility model can encode and generate various different stimulation waveforms, the amplitude is 0mA-30mA, the pulse width is 100uS-1000uS, and the frequency is 1Hz-200Hz, so that the more abundant use experience is provided, and the functions of impedance measurement, positive and negative electrode connection state detection, overcurrent and overload detection and the like of an electrical stimulation part are simultaneously realized.
In a specific embodiment, the wireless charging unit 102 wirelessly charges the lithium battery by using short-distance induction wireless charging or field resonance, and has the functions of charging state detection and metal foreign object detection, so that the charging scene is more flexible and convenient.
The USB charging unit 103 provides electric energy by using a bright and weft medical GSM12U05-USB type power supply, is connected to the lithium battery module through a Micro-USB or Mini-USB or TypeC-USB connector to charge the lithium battery, has higher USB charging efficiency than wireless charging, and can select one of wireless charging or USB charging according to actual conditions.
The bluetooth low energy unit 107 adopts BLE4.0-BLE5.0 bluetooth low energy communication for realizing information interaction between the stimulator 10 and the mobile terminal unit 20, data transceiving, bluetooth low energy more traditional bluetooth, ultra-low peak power consumption and excellent performance, and is very suitable for wearable equipment communication application.
The mobile terminal unit 20 is a mobile phone or a tablet computer running on an Android or IOS system platform, and establishes connection with the bluetooth low energy unit 107 of the stimulator 10 through a BLE module built in the mobile terminal, so as to complete data transceiving between the stimulator 10 and the mobile terminal unit 20, information statistics, information prompt when the stimulator 10 is abnormal (low voltage, overcurrent/overload, overheating, and the like), timing prompt of a training scheme, and the like.
The nonvolatile memory unit 104 includes an EEPROM or an FRAM to store the initial stimulation scheme and the stimulation parameter value after each adjustment of the stimulator 10, and particularly for some patient groups without smart phones, stimulation parameter setting and stimulation scheme selection can be directly performed through the key interaction unit 108 of the stimulator 10, and FRAM is preferably used, and compared with EEPROM, FRAM is fully compatible in package interface, faster in read-write speed, lower in power consumption, and better in radiation resistance, and compared with a conventional memory, is not easily affected by radiation sterilization rays.
The temperature measuring unit 105 comprises a miniature thermocouple for monitoring the body surface temperature of the electrical stimulation part of the epidermis of the posterior tibial nerve 119, and is used for stimulation protection, preventing skin burn and monitoring the temperature of a charging coil and a lithium ion battery in the wireless charging process, and preventing overheating.
The negative voltage circuit comprises a TLV431 chip, and has reliable function and low power consumption.
The electrode connecting unit 116 guides the output waveform to the cathode electrode 1161 and the anode electrode 1162 through a snap-fastener structure, referring to fig. 4, the overall shape is "butterfly" or "arc strip", wherein the cathode electrode 1161 is circular, and the current density is less than 2mA/cm2Acting on the trunk of the posterior tibial nerve 119, the anode electrode 1162 forms a current signal reference circuit and is also used for transmitting a body surface signal at the posterior tibial nerve 119 to the circuit of the stimulator 10; the body surface electrode 1163 is made of hydrogel material and can be repeatedly used by washing; in order to improve the reliability of the electrode connection, the electrode connection unit 116 further includes a transparent adhesive tape, which facilitates the fixation of the electrode and the stimulator 10 at the position of the Sanyinjiao acupoint, so that the stimulator 10 is not easily detached even when walking or exercising.
The waveform modulation circuit 115 adjusts the current signal output by the constant current source into different stimulation waveforms, the waveform diagram is shown in fig. 5, sine waves, triangular waves, pulse waves, asymmetric exponential waves and the like can be output, the amplitude is 0mA-30mA, the pulse width is 100uS-1000uS, the frequency is 1Hz-200Hz, and different waveforms can bring different treatment effects and comfort levels; meanwhile, positive and negative symmetrical square wave signals can be modulated according to different stimulation envelopes, and different experience feelings can be achieved; the different stimulation waveforms and stimulation envelopes described above may be configured by mobile terminal unit 20.
The power supply rail of the high-voltage floating ground operational amplifier circuit 112 is 5V, the whole high-voltage floating ground operational amplifier circuit 112 works in a floating ground state and presents high voltage to the ground, and the load output capacity of the rear-end constant current source circuit 113 is enhanced; only the potential difference of the positive end and the negative end is ensured to meet the power supply rail requirement of the operational amplifier, the flexibility is high, and the topological change of the circuit structure is easy.
The constant current source circuit 113 comprises a multistage operational amplifier and a Darlington transistor, the current output range is 0mA-30mA, and the whole current output range is linearly adjustable.
The DAC unit 114 is an on-chip or off-chip digital-to-analog conversion circuit of the MCU logic control unit 100, and generates a specific analog voltage for providing a reference input voltage of the constant current source circuit 113 and a reference voltage of the overcurrent and overload protection circuit 118, where the precision range of the analog voltage input by the constant current source circuit 113 depends on the resolution of the DAC used, and the MCU logic control unit 100 can optimize the error of the DAC analog quantity by using a table lookup method or a linear function calibration method, thereby further improving the linearity.
The status light indicating unit 106 uses 3 RGB three-color LED lights for specifying the functional status of the stimulator 10, the green LED flashes at a frequency of 1Hz when the stimulation is output, the bluetooth connection status indicating light is blue, the blue light flashes at a frequency of 2Hz to 4Hz when the communication connection is established, the blue is extinguished after the link is successfully established, the red indicating light is lit when the stimulator 10 fails, at this time, the MCU logic control unit 100 will cut off the high voltage BOOST circuit 109 and the constant current source circuit 113, and the yellow indicating light flashes at a frequency of 2Hz when the battery is at a low voltage, so as to prompt the user to charge;
the impedance measuring unit 117 measures the body surface impedance of the posterior tibial nerve 119 of the patient before starting the electrical stimulation so as to prompt the user to treat the skin surface, such as wiping with alcohol or removing the stratum corneum with hospital sand paper, and the MCU logic control unit 100 sets the maximum amplitude of the corresponding electrical stimulation according to the measured value of the body surface impedance, monitors the electrode connection status during the stimulation, and prevents the electrode from falling off.
The overcurrent and overload protection circuit 118 adopts low-end current sampling and logic level comparison for monitoring the amplitude of the stimulation signal in the stimulation process; when overcurrent occurs, the MCU logic control unit 100 timely blocks the outputs of the high-voltage BOOST circuit 109 and the constant current source circuit 113 to protect the driver during the electrical stimulation.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (10)
1. A wearable wireless intelligent posterior tibial nerve electrical stimulation system is characterized by comprising a stimulator and a mobile terminal unit communicated with the stimulator, wherein,
the stimulator comprises an MCU (microprogrammed control unit) logic control unit, a lithium battery unit, a wireless charging unit, a USB (universal serial bus) charging unit, a nonvolatile storage unit, a temperature measuring unit, a status lamp indicating unit, a low-power-consumption Bluetooth unit, a key interaction unit, a high-voltage BOOST (basic operating system) circuit, a negative voltage circuit, a high-voltage floating ground operational amplifier circuit, a constant current source circuit, a DAC (digital-to-analog converter) unit, a waveform modulation circuit, an electrode connecting unit, an impedance measuring unit and an overcurrent and overload protection circuit; the MCU logic control unit controls the charging and discharging of the lithium battery unit, controls the nonvolatile storage unit to store information, controls the temperature measuring unit to detect the body surface temperature of the stimulation part, controls the indication of the state indicator lamp, controls the low-power-consumption Bluetooth unit to carry out wireless communication, controls the key interaction unit to carry out interaction, controls the DAC unit to generate specific analog voltage, controls the high-voltage BOOST circuit to be switched on or switched off, indirectly controls the constant current source circuit to be switched on or switched off, controls the waveform modulation circuit to output through the electrode connecting unit, and measures the body surface impedance of the stimulation part and protects overcurrent and overload;
the lithium battery unit is respectively connected with the wireless charging unit, the USB charging unit and the high-voltage BOOST circuit, and comprises a lithium battery, a battery protection circuit and a 3.3V voltage stabilizing circuit;
the nonvolatile storage unit is used for storing an initial stimulation scheme and a stimulation parameter value after each adjustment, and storing power failure data;
the temperature measuring unit is used for acquiring the body surface temperature of the electrical stimulation part of the posterior tibial nerve epidermis and monitoring the temperatures of the coil and the battery in the wireless charging process;
the status lamp indicating unit comprises at least two status lamps, and is used for specifying the function status of the stimulator, including stimulation output status indication, Bluetooth connection status indication, stimulation fault status indication and battery low-voltage status indication;
the low-power consumption Bluetooth unit is used for information interaction between the stimulator and the mobile terminal unit;
the mobile terminal unit is connected with the low-power-consumption Bluetooth unit, and data receiving and sending and information statistics between the mobile terminal unit and the stimulator are established;
the key interaction unit comprises at least three keys, is arranged on the stimulator panel and is used for carrying out stimulator parameter regulation and control and function setting;
the high-voltage BOOST circuit BOOSTs the output voltage of the lithium battery to 36V or above and supplies power for the high-voltage floating ground operational amplifier circuit;
the negative voltage circuit reduces the voltage of 36V or more to 5V to supply power for the high-voltage floating ground operational amplifier circuit;
the high-voltage floating ground operational amplifier circuit is an operational amplifier circuit powered by a high-voltage BOOST circuit and a negative voltage circuit, and operates in a floating state;
the constant current source circuit comprises a multistage operational amplifier and a Darlington transistor, and is linearly adjustable;
the DAC unit is a DAC circuit arranged in or outside the MCU logic control unit and provides reference voltage of the constant current source circuit and reference voltage of the overcurrent and overload protection circuit;
the waveform modulation circuit adjusts the current signal output by the constant current source circuit into different stimulation waveforms, including positive and negative symmetrical square waves, triangular waves and asymmetrical exponential waves;
the electrode connecting unit comprises a cathode electrode and an anode electrode, and guides the output waveform of the waveform modulation circuit to the cathode electrode and the anode electrode, wherein the cathode electrode acts on the posterior tibial trunk, the anode electrode forms an electric signal reference loop, and the body surface signal of the posterior tibial nerve is conducted to the impedance measuring unit;
the impedance measuring unit is used for measuring the body surface impedance at the position of the posterior tibial nerve before electrical stimulation and monitoring the connection condition of the electrodes in the stimulation process;
the overcurrent and overload protection circuit monitors the amplitude of the stimulation signal output by the waveform modulation circuit in the stimulation process and feeds the amplitude back to the MCU logic control unit for output adjustment.
2. The system of claim 1, wherein the wireless charging unit wirelessly charges the lithium battery by using short-range induction wireless charging or field resonance.
3. The system of claim 1, wherein the USB charging unit and the external medical power adapter are connected to the lithium battery unit through Micro-USB or Mini-USB or TypeC-USB to charge the lithium battery.
4. The system according to claim 1, wherein the Bluetooth low energy unit employs BLE4.0-BLE5.0 Bluetooth low energy communication.
5. The system according to claim 1, wherein the mobile terminal unit is a mobile phone or a tablet computer running on Android or IOS system platform.
6. The system of claim 1, wherein the non-volatile memory cell comprises an EEPROM or a FRAM.
7. The system of claim 1, wherein the temperature measurement unit comprises a micro thermocouple.
8. The system of claim 1, wherein the negative voltage circuit comprises a TLV431 chip.
9. The system of claim 1, wherein the electrode connection unit directs the output waveform to the cathode electrode and the anode electrode through a snap-fit arrangement.
10. The system of claim 1, wherein the cathode electrode is circular and has a current density of less than 2mA/cm2。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038217A (en) * | 2019-05-17 | 2019-07-23 | 杭州承诺医疗科技有限公司 | A kind of wearable intelligent wireless posterior tibial nerve electric stimulation |
| CN111870812A (en) * | 2020-08-24 | 2020-11-03 | 大悦创新（苏州）医疗科技股份有限公司 | Electrical stimulation output circuit |
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2019
- 2019-05-17 CN CN201920715640.9U patent/CN210612698U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038217A (en) * | 2019-05-17 | 2019-07-23 | 杭州承诺医疗科技有限公司 | A kind of wearable intelligent wireless posterior tibial nerve electric stimulation |
| CN110038217B (en) * | 2019-05-17 | 2024-02-13 | 杭州承诺医疗科技有限公司 | Wearable wireless intelligent post-tibial nerve electrical stimulation system |
| CN111870812A (en) * | 2020-08-24 | 2020-11-03 | 大悦创新（苏州）医疗科技股份有限公司 | Electrical stimulation output circuit |
| CN111870812B (en) * | 2020-08-24 | 2024-04-02 | 大悦创新（苏州）医疗科技股份有限公司 | Electrical stimulation output circuit |
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