CN202654126U - Magnetic field stimulator with motor evoked potential (MEP) function - Google Patents
Magnetic field stimulator with motor evoked potential (MEP) function Download PDFInfo
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- CN202654126U CN202654126U CN 201220010131 CN201220010131U CN202654126U CN 202654126 U CN202654126 U CN 202654126U CN 201220010131 CN201220010131 CN 201220010131 CN 201220010131 U CN201220010131 U CN 201220010131U CN 202654126 U CN202654126 U CN 202654126U
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- evoked potential
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Abstract
The utility model provides a magnetic field stimulator with a motor evoked potential (MEP) function. The magnetic field stimulator comprises a complete high-voltage charging circuit formed by connecting a high-voltage charging power supply in parallel with a high-voltage storage capacitor, wherein the anode of the high-voltage storage capacitor is connected with the anode of a controllable silicon switch and the cathode of a reverse fly-wheel diode, and is connected with the cathode of the high-voltage storage capacitor after being connected with a magnetic field stimulation coil, so that a discharging circuit of the high-voltage storage capacitor acting on the magnetic field stimulation coil is constructed; and a control logic module is used for controlling the switch-on/off of the controllable silicon switch, so that the discharge of the high-voltage storage capacitor on the magnetic field stimulation coil is controlled. The magnetic field stimulator is characterized in that: the control logic module is further connected with an MEP module. Check of an MEP can be realized without any professional electromyogram evoked potentiometer, so that cost is saved; and an MEP functional module is integrated into the magnetic field stimulator, and accurate synchronization can be realized after stimulation to signal acquisition, so that an obtained MEP check result is not required to be subjected to delay correction, work is simplified, and the efficiency is increased.
Description
Technical field
This utility model relates to a kind of magnetic field stimulator, particularly a kind of band MEP(Motion Evoked Potential, hereinafter to be referred as: the MEP) magnetic field stimulator of function.
Background technology
Stimulate cerebral cortex to draw the Motion Evoked Potential of hand since doctor BARKER of Britain in 1985 with pulsed magnetic field, the development in existing more than 20 year of transcranial magnetic field stimulating technology and universal.Magnetic stimulation is a kind of harmless painless contactless, and Non-Invasive stimulates brain nervus centralis and perineural a kind of technology.Be widely used in clinical neurology, neural rehabilitation and mental psychology field, for medical diagnosis on disease, therapeutic evaluation, prognosis judgement and disease treatment aspect sure value arranged.
Magnetic field stimulator is according to the Faradic electricity magnetic induction principle, charge to storage capacitor with high direct voltage, with controllable silicon as electrical switch to the magnetic stimulation coil discharge, huge pulse current makes coil produce powerful pulsed magnetic field, the magnetic field of transition can make the inner faradic current that produces of biological tissue on every side, make the transmembrane potential depolarization of nerve fiber, produce action potential, thereby cause that neurocyte is excited, muscle contraction, hormone secretion touches a series of biological effects such as prominent modulation.
MEP is a neural electrophysiology inspection method for checking that the kinetic system function designs.Detection means as a kind of non-invasive, MEP has been widely used in the diagnosis, art of motor nervous system disease monitoring and prognosis and has estimated, especially in recent years, perfect along with magnetic stimulating technology and electrophysiology, superposed average technology, the scope of application of MEP is opened up extensively day by day.
MEP is the muscular movement complex potential that stimulus movement cortex is recorded at offside target flesh; Check the transmission of nervus motorius from cortex to muscle, Integral synchronous and the integrity of pathway.
MEP is a kind of very effectively neural electrophysiology detection method, has good sensitivity and specificity for the integrity of guarding kinetic system.
Clinically, the inspection of MEP generally all is that the auxiliary electromyogram evoked potentuial measuring system of magnetic field stimulator is realized.Because it is diverse two armarium that magnetic field stimulator and electromyogram bring out current potential.The inspection of MEP to be realized accurately, just the synchronous of two equipment must be guaranteed accurately.This just need to have a kind of concrete synchronization means to realize the synchronizing function of two distinct device.What generally adopt is that two device trigger input and output functions are come specific implementation.
Because the model of electromyogram evoked potentuial measuring system has a variety of.Triggering input/output interface structure and the electric property of the electromyogram evoked potentuial measuring system of every kind of model are very different again.This has just increased the complexity that magnetic field stimulator is connected with electromyogram evoked potentuial measuring system trigger interface greatly.Another aspect, because triggering signal is from the output interface of an equipment, the input interface that is transferred to another equipment often has certain transmission delay, so just caused the time-delay of MEP signal detection signal, so just can not get accurately MEP check result, its result need to proofread and correct delay time.And the delay time of the trigger interface of the electromyogram evoked potentuial measuring system of every kind of different model is all different.So just increased the difficulty that the MEP check result is proofreaied and correct.
The utility model content
The technical problems to be solved in the utility model is: a kind of magnetic field stimulator with the MEP function is provided, need not the specialty the electromyogram evoked potentuial measuring system, just can carry out the MEP(Motion Evoked Potential) detection.
This utility model is to solve the problems of the technologies described above the technical scheme of taking to be: a kind of magnetic field stimulator with the MEP function, comprise that a high voltage charging power supply parallel high voltage storage capacitor forms complete high-voltage charging circuit, the anode and the reverse fly-wheel diode negative electrode that are connected reverse-blocking tetrode thyristor by the positive pole of high-voltage energy storage capacitor, be connected with the negative pole of high-voltage energy storage capacitor after connecting again the magnetic stimulation coil, form high-voltage energy storage capacitor to the discharge circuit of magnetic stimulation coil, the break-make of control logic module controls reverse-blocking tetrode thyristor is controlled high-voltage energy storage capacitor to the discharge of magnetic stimulation coil; It is characterized in that: described control logic module also is connected with the MEP module.
Press such scheme, described MEP module comprises instrument amplifier, isolated amplifier, programmable amplifier, wave filter, power frequency notch filter, single-ended transfer difference circuit and the A/D convertor circuit that connects in turn; The MEP signal amplifies by instrument amplifier, realize the electrical isolation of human body and equipment by isolated amplifier, programmable amplifier amplifies signal, wave filter carries out bandpass filtering to signal, power frequency notch filter carries out the double T trap to signal, the single-ended transfer difference circuit is realized the conversion of signal single-ended-to-difference, carries out the A/D conversion under the control of control logic.
Press such scheme, described programmable amplifier amplification is 1 ~ 40000 adjustable.
Press such scheme, described wave filter is 0 ~ 10000Hz to the pass band of signal bandpass filtering.
Press such scheme, described power frequency notch filter is 50Hz to the frequency of signal double T trap.
The beneficial effects of the utility model are:
1, do not need the specialty the electromyogram evoked potentuial measuring system just can realize the MEP(Motion Evoked Potential) inspection, saved cost.
2, do not need to carry out for the electromyogram evoked potentuial measuring system of various different models the customization connection of trigger interface, simplified work.
3, because the MEP functional module is integrated in the magnetic field stimulator, its stimulation can be accomplished precise synchronization to signals collecting, makes the MEP check result that obtains not be used in the correction of delaying time, and has both simplified work, has improved again efficient.
Description of drawings
Fig. 1 is the circuit theory diagrams that magnetic field stimulator is connected with the electromyogram evoked potentuial measuring system.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 is the circuit theory diagrams of MEP module.
Among the figure: 1. magnetic field stimulator, 2. electromyogram evoked potentuial measuring system, 3. trigger interface line, 4. high voltage charging power supply, 5. high-voltage energy storage capacitor, 6. reverse fly-wheel diode, 7. reverse-blocking tetrode thyristor, 8. magnetic stimulation coil, 9. control logic module, 10.MEP module.
The specific embodiment
Fig. 1 is the circuit theory diagrams that magnetic field stimulator is connected with the electromyogram evoked potentuial measuring system, form complete high-voltage charging circuit by high voltage charging power supply 4 parallel high voltage storage capacitors 5, the anode and reverse fly-wheel diode 6 negative electrodes that are connected reverse-blocking tetrode thyristor 7 by the positive pole of high-voltage energy storage capacitor, connect again magnetic stimulation coil 8, consist of a series loop and get back to the negative pole of storage capacitor 5, form high-voltage energy storage capacitor to the discharge circuit of magnetic stimulation coil, the break-make of control logic module 9 control reverse-blocking tetrode thyristors is controlled high-voltage energy storage capacitor to the discharge of magnetic stimulation coil.Magnetic field stimulator 1 connects electromyogram evoked potentuial measuring systems 2 by trigger interface line 3, comes the stimulatory function of synchronous field stimulator 1 and electromyogram evoked potentuial measuring system 2 by the control logic of magnetic field stimulator, realizes the MEP sync check.
Fig. 2 is circuit theory diagrams of the present utility model, form complete high-voltage charging circuit by high voltage charging power supply 4 parallel high voltage storage capacitors 5, the anode and reverse fly-wheel diode 6 negative electrodes that are connected reverse-blocking tetrode thyristor 7 by the positive pole of high-voltage energy storage capacitor 5, connect again magnetic stimulation coil 8, consist of a series loop and get back to the negative pole of high-voltage energy storage capacitor 5, form high-voltage energy storage capacitor to the discharge circuit of magnetic stimulation coil, control logic module 9 connects reverse-blocking tetrode thyristor and MEP module 10.Can when the control high-voltage energy storage capacitor is to the discharge of magnetic stimulation coil, realize the detection collection of MEP signal.
The circuit theory diagrams of MEP module such as Fig. 3, the MEP signal at first amplifies by instrument amplifier from the COM end, realize the electrical isolation of human body and equipment by isolated amplifier, programmable amplifier amplifies signal, amplification is respectively * and 1 ~ * 40000 adjustable, filtering part carries out the bandpass filtering of 0 ~ 10000Hz to signal, power frequency notch filter carries out 50Hz double T trap to signal, the single-ended transfer difference circuit is realized the conversion of signal single-ended-to-difference, carries out the A/D conversion under the control of control logic.
Claims (5)
1. magnetic field stimulator with the Motion Evoked Potential function, comprise that a high voltage charging power supply parallel high voltage storage capacitor forms complete high-voltage charging circuit, the anode and the reverse fly-wheel diode negative electrode that are connected reverse-blocking tetrode thyristor by the positive pole of high-voltage energy storage capacitor, be connected with the negative pole of high-voltage energy storage capacitor after connecting again the magnetic stimulation coil, form high-voltage energy storage capacitor to the discharge circuit of magnetic stimulation coil, the break-make of control logic module controls reverse-blocking tetrode thyristor is controlled high-voltage energy storage capacitor to the discharge of magnetic stimulation coil; It is characterized in that: described control logic module also is connected with the Motion Evoked Potential module.
2. the magnetic field stimulator with the Motion Evoked Potential function according to claim 1 is characterized in that: described Motion Evoked Potential module comprises instrument amplifier, isolated amplifier, programmable amplifier, wave filter, power frequency notch filter, single-ended transfer difference circuit and the A/D convertor circuit that connects in turn; The Motion Evoked Potential signal amplifies by instrument amplifier, realize the electrical isolation of human body and equipment by isolated amplifier, programmable amplifier amplifies signal, wave filter carries out bandpass filtering to signal, power frequency notch filter carries out the double T trap to signal, the single-ended transfer difference circuit is realized the conversion of signal single-ended-to-difference, carries out the A/D conversion under the control of control logic.
3. the magnetic field stimulator with the Motion Evoked Potential function according to claim 2 is characterized in that: described programmable amplifier amplification is 1 ~ 40000 adjustable.
4. the magnetic field stimulator with the Motion Evoked Potential function according to claim 2, it is characterized in that: described wave filter is 0 ~ 10000Hz to the pass band of signal bandpass filtering.
5. the magnetic field stimulator with the Motion Evoked Potential function according to claim 2, it is characterized in that: described power frequency notch filter is 50Hz to the frequency of signal double T trap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220010131 CN202654126U (en) | 2012-01-10 | 2012-01-10 | Magnetic field stimulator with motor evoked potential (MEP) function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220010131 CN202654126U (en) | 2012-01-10 | 2012-01-10 | Magnetic field stimulator with motor evoked potential (MEP) function |
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| CN202654126U true CN202654126U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220010131 Expired - Lifetime CN202654126U (en) | 2012-01-10 | 2012-01-10 | Magnetic field stimulator with motor evoked potential (MEP) function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109144295A (en) * | 2018-08-14 | 2019-01-04 | 京东方科技集团股份有限公司 | Hand-hold electronic equipments and electronic apparatus system |
| CN111857231A (en) * | 2020-07-14 | 2020-10-30 | 中国科学院电工研究所 | Device and method for controlling rotating magnetic field by using capacitor charging and discharging time sequence |
| CN112755395A (en) * | 2021-01-21 | 2021-05-07 | 武汉依瑞德医疗设备新技术有限公司 | True and false pulse magnetic stimulation therapeutic instrument |
-
2012
- 2012-01-10 CN CN 201220010131 patent/CN202654126U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109144295A (en) * | 2018-08-14 | 2019-01-04 | 京东方科技集团股份有限公司 | Hand-hold electronic equipments and electronic apparatus system |
| CN111857231A (en) * | 2020-07-14 | 2020-10-30 | 中国科学院电工研究所 | Device and method for controlling rotating magnetic field by using capacitor charging and discharging time sequence |
| CN112755395A (en) * | 2021-01-21 | 2021-05-07 | 武汉依瑞德医疗设备新技术有限公司 | True and false pulse magnetic stimulation therapeutic instrument |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 430206 hi tech medical equipment Park, 818 hi tech Avenue, East Lake hi tech Development Zone, Hubei, Wuhan Patentee after: Wuhan Aosaifu Medical Technology Co.,Ltd. Address before: 430074 Hubei province Wuhan city East Lake high tech Zone Dongxin Road Venture Street 1 building 10 floor Patentee before: Wuhan Aosaifu Medical Technology Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |