CN109990964A - Fretting damage simulation system in a kind of nerve electrode body - Google Patents

Fretting damage simulation system in a kind of nerve electrode body Download PDF

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Publication number
CN109990964A
CN109990964A CN201910208097.8A CN201910208097A CN109990964A CN 109990964 A CN109990964 A CN 109990964A CN 201910208097 A CN201910208097 A CN 201910208097A CN 109990964 A CN109990964 A CN 109990964A
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CN
China
Prior art keywords
nerve electrode
execution module
lifting platform
electrode body
simulation
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Pending
Application number
CN201910208097.8A
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Chinese (zh)
Inventor
张文光
周旭晖
李伟
谢颉
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Priority to CN201910208097.8A priority Critical patent/CN109990964A/en
Publication of CN109990964A publication Critical patent/CN109990964A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures
    • G01M7/02Vibration-testing by means of a shake table
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures
    • G01M7/02Vibration-testing by means of a shake table
    • G01M7/022Vibration control arrangements, e.g. for generating random vibrations
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures
    • G01M7/02Vibration-testing by means of a shake table
    • G01M7/025Measuring arrangements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures
    • G01M7/02Vibration-testing by means of a shake table
    • G01M7/027Specimen mounting arrangements, e.g. table head adapters

Abstract

The invention discloses fretting damage simulation systems in a kind of nerve electrode body, are related to medical instrument testing field, including fretting simulation part and vivo environment analog portion;Fretting simulation part includes control drive module and execution module;Controlling drive module includes waveform generator and piezo controller, and waveform generator is connected with piezo controller;Execution module includes lifting platform, L shape conversion tool, piezoelectric ceramics brake, electrode holder and nerve electrode;Lifting platform top plate is arranged on execution module top plate, and one end of L shape conversion tool is connect with lifting platform bottom plate;Piezoelectric ceramics brake is cylinder, and the other end of L shape conversion tool is arranged in;One end of piezoelectric ceramics brake is arranged in electrode holder, and one end of nerve electrode is arranged on electrode holder.The invention can accurate analog neuron electrode et al. Ke environment, the fretting damage of electrode in vivo is included in assessment scope, compared with Bioexperiment, experimental period is short and at low cost.

Description

Fretting damage simulation system in a kind of nerve electrode body
Technical field
The present invention relates to fretting damage simulation systems in medical instrument testing field more particularly to a kind of nerve electrode body.
Background technique
Neuscience and neural requirement of engineering carry out quantitative study to the electrical activity situation of brain neuroblastoma member, big to understand The mechanism of brain generation, transmission and processing information.Embedded nerve electrode can recorde nervous system as a kind of senser element Electrical activity situation.By nerve electrode, electro photoluminescence can also be applied to brain specific region or peripheral nerve, inhibited abnormal Nerve signal can also be restored by functional electrostimulation for treating the diseases such as Parkinson's disease or other chronic aches The movement of paralyzed limbs.Since in nerve electrode implantation patient, service life is vital parameter.If the electrode longevity It orders too short, needs to be performed a plurality of times surgical operation and be implanted into new electrode again, can greatly aggravate the difficulty and cost for the treatment of in this way, It will increase the pain of sufferer.For decades, scientific research personnel is seeking always the mind that design performance is more excellent, the service life is longer Through electrode, however this work also encounters very big challenge, because the premise that the nerve electrode service life is quantitatively evaluated is building One is implanted into the consistent Evaluation Environment of environment high with practical, and realizes that this test environment is very difficult.It is domestic at present The method in outer assessment nerve electrode service life is divided into experiment in vivo and two kinds of experiment in vitro.
Experiment in vivo is by internal, the service life of recording electrode, such as Barrese of electrode implantation experiment animal to be assessed Et al. with regard to use such method assessed.The greatest problem of this method is that at high cost, experimental period is long, and experiment is dynamic in addition Had differences between object with other accidentalia, therefore this method is not found broad application.Experiment in vitro impregnates electrode In imitated biological tissue's solution, a more severe experimental situation is generated by the method for heating, applying ultrasonic activation, To assess the durability of nerve electrode, assessed as Takmakov et al. just uses such method.Compared to internal reality It tests, the test condition of experiment in vitro is easier to realize, but the Evaluation Environment of its application and the environment in true biological tissue It is far apart.More in recent years documents point out that the actual life after electrode is implanted into vivo and assessment test obtained expection Service life is not consistent, because the fretting damage of nerve electrode in vivo is not included in assessment scope by this kind of appraisal procedure.Aaron Gilletti et al. is pointed out, due to beat pulse and respiration, cerebral tissue can generate a few micrometers of amplitude of periodical fine motion. According to the conclusion of Ma Yakun et al.: about 10 microns of the amplitude of fine motion, about 4 hertz of frequency.Tissue fine motion can make nerve electrode and big Micron-sized relative motion is constantly generated between cerebral cortex, according to current clinical research experience, this relative motion is Cause nerve electrode surface that fatigue damage, the one of the major reasons of functional deterioration occurs.Aging of this factor in nerve electrode It occupies an leading position, cannot ignore in the process.But existing nerve electrode service life evaluation system being capable of not simulated tissue fine motion Equipment, this is also the maximum reason for causing evaluation method less accurate.
The technical problem to be solved by the present invention is to how accurate analog neuron electrode in vivo micron order movement system, solution The problem of certainly experimental cost is high, time-consuming and laborious and poor durability.
Therefore, those skilled in the art is dedicated to developing fretting damage simulation system in a kind of nerve electrode body, can essence The et al. Ke environment of true analog neuron electrode, is included in assessment scope for the fretting damage of electrode in vivo, with Bioexperiment phase Than experimental period is short and at low cost.
Summary of the invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to how accurate analog neuron is electric The system of pole micron order movement in vivo, solves the problems, such as that experimental cost is high, time-consuming and laborious and poor durability.
To achieve the above object, the present invention provides fretting damage simulation systems in a kind of nerve electrode body, including fine motion Analog portion and vivo environment analog portion;The fretting simulation part includes control drive module and execution module;The control Drive module processed includes waveform generator and piezo controller, and the waveform generator is connected with the piezo controller;It is described Execution module includes execution module top plate, execution module bottom plate, execution module bracket, lifting platform, L shape conversion tool, piezoelectricity pottery Porcelain brake, electrode holder and nerve electrode;The lifting platform top plate is arranged on the execution module top plate, and the L shape turns The one end for changing tooling is connect with the lifting platform bottom plate;The piezoelectric ceramics brake is cylinder, and setting is converted in the L shape The other end of tooling, the piezoelectric ceramics brake are parallel with the execution module bracket;The electrode holder is arranged described One end of one end of piezoelectric ceramics brake, the nerve electrode is arranged on the electrode holder.
Further, the vivo environment analog portion includes water-bath, simulation brain tissue and simulation celiolymph;It is described Simulating brain tissue is the silica gel comprising softening agent;The simulation celiolymph is the easy mixing with deionized water of phosphate-buffered salt Solution.
Further, the simulation brain tissue is arranged on the execution module bottom plate, the other end of the nerve electrode It is placed in the simulation brain tissue.
Further, the lifting platform top plate is removably disposed on the execution module top plate.
Further, the lifting platform top plate and the execution module top plate are to be bolted.
Further, one end of the L shape conversion tool and the lifting platform bottom plate are to be detachably connected.
Further, one end of the L shape conversion tool and the lifting platform bottom plate are to be bolted.
Further, the piezoelectric ceramics brake is removably disposed in the L shape conversion tool.
Further, the other end of the L shape conversion tool is provided with brake transfer hole, the piezoelectric ceramics brake It can be inserted into the brake transfer hole.
Further, the lifting platform includes fine motion nut and braking organ, the fine motion nut and the braking organ One end be in contact.
The present invention can accurate analog neuron electrode et al. Ke environment, the fretting damage of electrode in vivo is included in assessment Scope, compared with Bioexperiment, experimental period is short and at low cost.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is fretting damage simulation system schematic diagram in the nerve electrode body of a preferred embodiment of the invention;
Fig. 2 is the execution module structural schematic diagram of fretting damage simulation system in nerve electrode body;
Fig. 3 is the lifting platform structural schematic diagram of fretting damage simulation system in nerve electrode body;
Fig. 4 is the braking lifting platform organ structural schematic diagram of fretting damage simulation system in nerve electrode body;
Fig. 5 is the L shape conversion tool structural schematic diagram of fretting damage simulation system in nerve electrode body;
Wherein, 1- nerve electrode, 2- execution module bottom plate, 3- simulation brain tissue, 4- electrode holder, 5-L shape conversion tool, 6- piezoelectric ceramics brake, 7- lifting platform, 8- execution module bracket, 9- execution module top plate, 10- lifting platform top plate, 11- lifting Platform roof hole, 12- fine motion nut, 13- lifting platform bottom plate, 14- lifting platform bottom plate hole, 15- brake organ, and 16- conversion tool is solid Determine hole, 17- fixing bolt, 18- fixation hole, 19- brake transfer hole.
Specific embodiment
Multiple preferred embodiments of the invention are introduced below with reference to Figure of description, keep its technology contents more clear and just In understanding.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention not only limits The embodiment that Yu Wenzhong is mentioned.
In the accompanying drawings, the identical component of structure is indicated with same numbers label, everywhere the similar component of structure or function with Like numeral label indicates.The size and thickness of each component shown in the drawings are to be arbitrarily shown, and there is no limit by the present invention The size and thickness of each component.Apparent in order to make to illustrate, some places suitably exaggerate the thickness of component in attached drawing.
As shown in Figure 1, fretting damage simulation system includes fretting simulation part and vivo environment simulation in nerve electrode body Part.Vivo environment analog portion includes thermostat water bath, simulation brain tissue 3 and simulation spinal fluid.Thermostat water bath is for adjusting Analog temperature is saved, simulation brain tissue 3 is the silica gel comprising softening agent, is placed in the rectangular channel of execution module bottom plate 2.Fretting simulation Part includes control drive module and execution module.Controlling drive module includes waveform generator and piezo controller.Execute mould Block includes lifting platform 7, L shape conversion tool 5, piezoelectric ceramics brake 6, electrode holder 4 and nerve electrode 1.
As shown in Fig. 2, lifting platform top plate 10 is fixed across lifting platform roof hole 11 by bolt in execution module structure On execution module top plate 9, the elemental height of nerve electrode 1 is adjusted by rotary fine adjustment nut 12;L shape conversion tool 5 passes through Bolt passes through lifting platform bottom plate hole 14 and is fixed on lifting platform bottom plate 13, and piezoelectric ceramics brake 6 is transferred across L shape conversion tool Hole 19, piezoelectric ceramics brake 6 are parallel with execution module bracket 8;Electrode holder 4 is connected through a screw thread and piezoelectric ceramics brake 6 displacement end face connects, it can be achieved that vertical direction fine motion;Nerve electrode 1 is bonded on electrode holder 4 by adhesive of medical.
As shown in Figure 3 and Figure 4, it is provided with braking organ 15 between lifting platform top plate 10 and lifting platform bottom plate 13, passes through rotation Turning fine motion nut 12 can control the height braked between the adjusting lifting platform top plate 10 of organ 15 and lifting platform bottom plate 13.
As shown in figure 5, the side of the brake transfer hole 19 of L shape conversion tool 5 is provided with fixation hole 18 and fixing bolt 17, fixing bolt 17 passes through fixation hole 18, can fix piezoelectric ceramics brake 10.
The following are specific embodiments of the present invention:
Embodiment 1
Formula of the experimental situation temperature to microelectronic component aging acceleration:
t37=tT×2(T-37)/10
Wherein: t37It is simulation in the ageing time (i.e. under 37 DEG C of environment) under body temperature environment, T is actual experimental situation Temperature, yTFor the duration of senile experiment.Nerve electrode 1 is bonded on electrode holder 4 using adhesive of medical, fine tuning rises Drop platform 7 makes in the insertion simulation brain tissue 3 of nerve electrode 1.Waveform generator can produce the signal of any amplitude, frequency, phase Waveform.Signal waveform is applied on piezoelectric ceramics brake 6 after piezo controller enhanced processing, makes its band moving electrode Fixture 4 generates fine motion, to make the fine motion opposite with the simulation generation vertical direction of brain tissue 3 of nerve electrode 1, analog neuron and brain Oligodynamics between tissue.Execution module is soaked in simulation cerebrospinal fluid, is added by water bath heating by cerebrospinal fluid is simulated Heat adjusts waveform generator and piezo controller, so that nerve electrode 1 is generated amplitude 10 micro- to 67 DEG C (practical body temperature is 37 DEG C) Rice, the vertical fine motion that frequency is 32 hertz (actual tissue vibration frequency is 4 hertz) form the ageing environment of 8 speeds, continue 24 The senile experiment of hour, it can aging in the nerve electrode body that more accurate simulation continues 192 hours.
Embodiment 2
Nerve electrode 1 is bonded on electrode holder 4 using adhesive of medical, fine tuning lifting platform 7 is inserted into nerve electrode 1 It simulates in brain tissue.Waveform generator can produce the signal waveform of any amplitude, frequency, phase.Signal is passing through voltage control It after device enhanced processing processed, is applied on piezoelectric ceramics brake 6, makes it that electrode holder 4 be driven to generate fine motion, to make neuroelectricity The fine motion opposite with the simulation generation vertical direction of brain tissue 3 of pole 1, the oligodynamics between analog neuron and cerebral tissue.It will execute Module is placed on vibration isolation experiment porch, accesses precision mechanics measuring device in the tail end of piezoelectric ceramics brake 6.Mould will be executed Block is immersed in simulation cerebrospinal fluid, is heated to 37 DEG C for cerebrospinal fluid is simulated using thermostat water bath, is adjusted waveform generator and pressure Electric controller makes the vertical fine motion that nerve electrode 1 generates 10 microns of amplitude, frequency is 4 hertz.It is surveyed by reading in precision mechanics Device is measured, the mechanical function between tissue after the implantation of nerve electrode 1 is assessed, thus for optimization 1 dimensional structure of nerve electrode Active force between surface topography, reduction electrode and tissue provides reference.
Embodiment 3
The electrode of new type nerve currently, the novel degradables material such as hydrogel, fibroin, PLGA has been widely used In design.It is limited by the limitation of Bioexperiment, degradation material degradation speed in vivo and degradation process are difficult to observe.? 1 surface of nerve electrode one layer of PLGA coating is smeared by the method for 3D printing.Nerve electrode 1 is bonded in using adhesive of medical On electrode holder 4, fine tuning lifting platform 7 makes in the insertion simulation brain tissue 7 of nerve electrode 1.Waveform generator can produce any width Value, frequency, the signal waveform of phase.Signal is applied to piezoelectric ceramics brake 6 after piezo controller enhanced processing On, make it that electrode holder 4 be driven to generate fine motion, to keep nerve electrode 1 and the simulation generation vertical direction of brain tissue 3 opposite micro- It is dynamic, the oligodynamics between the electrode and cerebral tissue of analog neuron.Execution module is immersed in simulation cerebrospinal fluid, water is passed through Bath heating is heated to 37 DEG C for cerebrospinal fluid is simulated, and adjusts waveform generator and piezo controller, nerve electrode 1 is made to generate amplitude The vertical fine motion for being 4 hertz for 10 microns, frequency.By the variation of electrode surface pattern after optical microscopy record implantation, comment The degradation speed of the novel degradables such as PLGA material after the implantation is estimated, to be development and Application in the electrode novel degradable of nerve Material provides reference.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea Scheme, all should be within the scope of protection determined by the claims.

Claims (10)

1. fretting damage simulation system in a kind of nerve electrode body, which is characterized in that including fretting simulation part and vivo environment Analog portion;The fretting simulation part includes control drive module and execution module;The control drive module includes waveform Generator and piezo controller, the waveform generator are connected with the piezo controller;The execution module includes executing mould Block top plate, execution module bottom plate, execution module bracket, lifting platform, L shape conversion tool, piezoelectric ceramics brake, electrode holder and Nerve electrode;The lifting platform top plate is arranged on the execution module top plate, one end of the L shape conversion tool and the liter The connection of platform bottom plate is dropped;The piezoelectric ceramics brake is cylinder, and the other end of the L shape conversion tool, the pressure is arranged in Electroceramics brake is parallel with the execution module bracket;The one of the piezoelectric ceramics brake is arranged in the electrode holder The one end at end, the nerve electrode is arranged on the electrode holder.
2. fretting damage simulation system in nerve electrode body as described in claim 1, which is characterized in that the vivo environment mould Quasi- part includes water-bath, simulation brain tissue and simulation celiolymph;The simulation brain tissue is the silica gel comprising softening agent;Institute Stating simulation celiolymph is the easy mixed solution with deionized water of phosphate-buffered salt.
3. fretting damage simulation system in nerve electrode body as claimed in claim 2, which is characterized in that the simulation brain tissue It is arranged on the execution module bottom plate, the other end of the nerve electrode is placed in the simulation brain tissue.
4. fretting damage simulation system in nerve electrode body as described in claim 1, which is characterized in that the lifting platform top plate It is removably disposed on the execution module top plate.
5. fretting damage simulation system in nerve electrode body as claimed in claim 4, which is characterized in that the lifting platform top plate It is to be bolted with the execution module top plate.
6. fretting damage simulation system in nerve electrode body as described in claim 1, which is characterized in that the L shape converts work One end of dress is to be detachably connected with the lifting platform bottom plate.
7. fretting damage simulation system in nerve electrode body as claimed in claim 6, which is characterized in that the L shape converts work One end of dress is to be bolted with the lifting platform bottom plate.
8. fretting damage simulation system in nerve electrode body as described in claim 1, which is characterized in that the piezoelectric ceramics system Dynamic device is removably disposed in the L shape conversion tool.
9. fretting damage simulation system in nerve electrode body as described in claim 1, which is characterized in that the L shape converts work The other end of dress is provided with brake transfer hole, and the piezoelectric ceramics brake can be inserted into the brake transfer hole.
10. fretting damage simulation system in nerve electrode body as described in claim 1, which is characterized in that the lifting platform packet Fine motion nut and braking organ are included, the fine motion nut is in contact with one end of the braking organ.
CN201910208097.8A 2019-03-19 2019-03-19 Fretting damage simulation system in a kind of nerve electrode body Pending CN109990964A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112370064A (en) * 2020-10-28 2021-02-19 上海交通大学 Clamping die, auxiliary electrode implantation device utilizing ultrasonic vibration and implantation method

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Application publication date: 20190709