CN202408896U - Electroencephalogram electrode - Google Patents
Electroencephalogram electrode Download PDFInfo
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- CN202408896U CN202408896U CN2011204959902U CN201120495990U CN202408896U CN 202408896 U CN202408896 U CN 202408896U CN 2011204959902 U CN2011204959902 U CN 2011204959902U CN 201120495990 U CN201120495990 U CN 201120495990U CN 202408896 U CN202408896 U CN 202408896U
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Abstract
The utility model provides an electroencephalogram electrode. The electroencephalogram electrode comprises an electrode plate, gauze, O-shaped sealing rings, a liquid storage tank channel, cotton, a liquid storage tank, a liquid storage tank cover, an electrode shell, a pure-silver connector, a silver wire, a lead channel, a fixed frame and a positioning plate, wherein the electrode plate is embedded in the bottom of the electrode shell and welded with the pure-silver connector by virtue of the silver wire and through the lead channel; the liquid storage tank with the liquid storage tank channel is arranged in the electrode shell; grooves are formed on the bottom of the electrode shell and adaptive to the O-shaped sealing rings; the cotton is placed in the liquid storage tank and extends to the surface of the electrode plate through the liquid storage tank channel; the gauze covers the cotton on the surface of the electrode plate; and the electrode shell is connected with the fixed frame and the positioning plate. The electroencephalogram electrode has the beneficial effects that the structure design is rational, the electrode impedance is low and stable, the baseline drift is reduced, the impedance between the electrode surface and skin is stable, the noise is low, and an electric conduction liquid does not need to be compensated in a testing process so as to save time and labor, enhance testing speed and achieve a good effect. As the liquid storage tank is covered and sealed, the electric conduction liquid is prevented from volatizing after being placed for a long time.
Description
Technical field
This utility model belongs to technical field of medical instruments, relates to a kind of EEGelectrode.
Background technology
Electroencephalogram is in certain location, the electrical activity of the brain cell that the electrode of placing through scalp surface collects.Bio electricity is in the vital movement process, the various current potentials or the electric current that produce in vivo.But organism is an ion conductor, and the bioelectrical signals that measure ion conductor just must use pair of electrodes to become the signal of electronic conductor to the conversion of signals of ion conductor, just can be transferred to the input of gauge, amplifies record.How to improve the stability of EEG signals (EEG), the artifact that reduces instrument is one of effective means that accurately reflects patient's intracranial organic disease.
Existing EEGelectrode mainly is made up of electrode slice, gauze and support, but has following problem and shortage:
1, the material of electrode is processed by copper is silver-plated; General exsiccant electrode rigidly connects and touches conductive liquid and use immediately, when record EEG, is prone to make wave distortion, baseline drift; The graphical quality of record is poor, when practical application, needs wait just can make electrode stable in about 15 minutes usually.For this reason, generally can prepare for use next time in the whole immersion saline of electrode after using.Be immersed in the electrode in the sodium chloride solution,, caused corrosion by displacement reaction easily, so service life be shorter if the coupling of electrode is not to process with similar metal with electrode.
2, the EEG measuring time longer, approximately 20-30 minute, because the influence of body temperature, conductive liquid was dry because of volatilization, makes electrode and scalp loose contact, the record baseline produces and drifts about.Sometimes measure accurately for making, must add conductive liquid midway, prolong the testing time of sufferer, influence the electroencephalogram quality.
3, electrode is the plane, and gauze is as the water accepting layer on surface, and electrode surface can be squeezed when the measure cerebral electrograph, and conductive liquid is extruded, and is prone to cause the conductive liquid of electrode surface not enough during use, causes the generation baseline drift, wave distortion, and noise also can produce thereupon.
4, for the silver-plated EEGelectrode of copper because electrode is immersed in for a long time that electrode can corrode in the NaCl solution, after user uses up electrode every day, all to it be cleaned, dry, soaked again again in second day, use inconvenient.
5, Ag-AgCl electrolyte of electrodes ion must use contain Cl-saline solution.Mainly contain two kinds of chloride saline solution of NaCl and KCl in the human body fluid, but be superior to NaCl, and the conductive liquid that generally uses at present all is a NaCl solution from electric conductivity KCl.
How to design a kind of EEGelectrode, electrode potential is stable, figure is clear, baseline is steady, capacity of resisting disturbance is strong, corrosion-resistant, long service life, application are convenient, and this is present problem demanding prompt solution.
Summary of the invention
The purpose of this utility model is to overcome the problem and shortage that exists in the prior art, and a kind of EEGelectrode is provided, its novel structure; The EEGelectrode that uses both at home and abroad at present on the serviceability is greatly improved; Certainty of measurement is high, and impedance is lower and steady, and is easy to use.
This utility model is realized through following technical scheme:
A kind of EEGelectrode (H14) mainly comprises: electrode slice, gauze, O-ring seals, hopper passage, Cotton Gossypii, hopper, hopper lid, electrode shell, fine silver joint, filamentary silver lead, lead channels, fixed mount and location-plate, electrode slice intercalation electrode housing bottom; One end of electrode slice and filamentary silver lead is affixed, and electrode slice through lead channels and the welding of fine silver joint, is provided with the hopper passage through the filamentary silver lead in the hopper; Hopper is positioned at the electrode slice top, and in the electrode shell of packing into, the hopper lid is fitted with hopper mutually; The electrode shell bottom is provided with groove and fits mutually with the O-ring seals of placement; Cotton Gossypii places in the hopper, and extends to the electrode slice surface through the hopper passage, and gauze covers on the Cotton Gossypii on electrode slice surface; Electrode shell and fixed mount are fixed, and fixed mount is connected through nut with location-plate.
Adopt the base material of Ag-AgCl composite as electrode slice, electrode slice is that groove is cup-shaped.
Conductive liquid is selected NaCl, KCl solution or composite conductive liquid (KCl solution+nontoxic liquid detergent) for use.
This utility model compared with prior art has following advantage and good effect:
(1) on this utility model EEGelectrode the conductive liquid hopper is set, novel structure, electrode impedance is stable.Electrode potential is stable during measurement, and baseline drift reduces, the impedance stabilization of electrode surface and skin, and noise is low.Need not in test process to replenish conductive liquid simultaneously, clinical practice shows, H14 can 4-5 patients of continuous review during use, and do not need saline soak, have saved manpower, have accelerated detection speed, and is time saving and energy saving, effective.
(2) this utility model EEGelectrode adopts the base material of Ag-AgCl composite as electrode slice, and electrode slice adopts the groove cup-shaped design, and with conductive liquid measure cerebral electrograph the time, impedance is lower, can make the bigger raising of EEG graphical quality.
(3) this utility model EEGelectrode has also designed EEGelectrode placing trough and seal box.After finishing the electroencephalogram test at every turn; Take off test electrode and put into the electrode placing trough, can make the gauze Cotton Gossypii of electrode and conductive liquid storage tank all be filled conductive liquid just, make electrode potential be in stable status; The electroencephalogram distortion is disturbed and is lacked during measurement, and the electrode that takes out like this can be tested.If for a long time need not, dry for preventing conductive liquid, the electrode placing trough is sealed, prevent the volatilization of conductive liquid.
(4) with composite conductive liquid measure cerebral electrograph, impedance is lower, can make the bigger raising of EEG graphical quality.
Description of drawings
Fig. 1 is this utility model EEGelectrode structural representation front view.
Fig. 2 is this utility model EEGelectrode critical piece structural representation.
Fig. 3 is the electrode placing trough sketch map of this utility model EEGelectrode.
Fig. 4 is the seal box sketch map of this utility model EEGelectrode.
Fig. 5 for inlet electrode with composite conductive liquid and H14 electrode the impedance variation of different time points during with the equal degrease of composite conductive liquid, wherein 1 expression inlet electrode is with the impedance of composite conductive liquid group, 3 represent that the H14 electrodes are with the impedance of composite conductive liquid group.
Fig. 6 for the H14 electrode with 2%NaCl solution and inlet electrode impedance variation with the equal degrease different time points of 2%NaCl solution, wherein 2 expression inlet electrodes are with the impedance of 2%NaCl solution group, 4 represent that the H14 electrodes are with the impedance of 2%NaCl solution group.
Fig. 7 is this utility model electroencephalogram waveform figure.
Fig. 8 is the Skin Resistance experiment.
Fig. 9 is that surfactant is to the anti-influence experiment of skin resistance.
The specific embodiment
This utility model combines accompanying drawing and embodiment to be further described.
With reference to Fig. 1-2, a kind of EEGelectrode mainly comprises electrode slice 1, gauze 2, O-ring seals 3, hopper passage 4, Cotton Gossypii 5, hopper 6, hopper lid 7, electrode shell 8, fine silver joint 9, filamentary silver lead 10, lead channels 11, fixed mount 12 and location-plate 13; Electrode slice 1 intercalation electrode housing 8 bottoms, electrode slice 1 is affixed with an end of filamentary silver lead 10, promptly when making electrode slice 1; An end that is about to filamentary silver lead 10 is imbedded, and suppresses together and sintering, and electrode slice 1 passes through filamentary silver lead 10 through lead channels 11 and 9 welding of fine silver joint; Be provided with hopper passage 4 in the hopper 6, hopper 6 is positioned at electrode slice 1 top, and in the electrode shell 8 of packing into; Hopper lid 7 is fitted with hopper 6 mutually; The O-ring seals 3 that is provided with groove and placement apart from 5mm place, electrode shell 8 bottom is fitted mutually, and through O-ring seals 3 fixedly Cotton Gossypii 5 and gauze 2, Cotton Gossypii 5 places in the hopper 6; And extend to electrode slice 1 surface through hopper passage 4; Gauze 2 covers on the Cotton Gossypii 5 on electrode slice 1 surface, and electrode shell 8 is fixing with fixed mount 12, and fixed mount 12 and location-plate 13 are connected through nut.Adopt the base material of Ag-AgCl composite as electrode slice, electrode slice 1 is that groove is cup-shaped.
It is cup-shaped that this utility model electrode slice 1 is designed to groove.The EEGelectrode sheet of import is the plane, and gauze is as the water accepting layer on surface, and electrode surface can be squeezed when the measure cerebral electrograph; Conductive liquid is extruded, and is prone to cause the conductive liquid of electrode surface not enough during use, causes the generation baseline drift; Wave distortion, noise also can produce thereupon.With electrode slice change into groove cup-shaped after, when electrode moved, the electric double layer at electrode and conductive liquid interface can not produce disturbance.
Conductive liquid is selected NaCl or KCl solution or composite conductive liquid (KCl solution+nontoxic liquid detergent) for use, and composite conductive liquid is the nontoxic liquid detergent of KCl solution+1-2% of 1% by mass ratio, water configuration 100%.
Referring to Fig. 3-4; Time spent not at ordinary times, the single EEGelectrode of embodiment 1 arranged be positioned in the electrode placing trough 14, make gauze, Cotton Gossypii and hopper in the electrode all be filled conductive liquid; Electrode potential is in stable status; The distortion of electroencephalogram is disturbed and is lacked during measurement, when needing to use, takes out electrode and can test.If for a long time need not, dry for preventing conductive liquid, electrode placing trough 14 is put into seal box 15, add a cover 16 sealings, to prevent the volatilization of conductive liquid.During test, electrode is placed the human body scalp through location-plate 13.
1. adopt the EEGelectrode (being called for short the H14 electrode) and U.S.'s Medtronic (Medtronic) of this utility model; Ref.9013E1321 EEGelectrode (abbreviation inlet electrode) compares research; Choose 12 health volunteers, be divided into 2 groups at random, every group 6 people according to sex, age etc.Get into H14 electrode group and import Medtronic electrode group respectively.Carry out EEG(electrocardiogram) examination with this group electrode with two kinds of conductive liquid (2%Nacl solution or composite conductive liquid) respectively, obtain electroencephalogram 24 width of cloth altogether, carry out following relative analysis.2 groups of crowd's ordinary circumstances such as table 1.All statistics adopt SPSS 16.0 to analyze, and in patient's ordinary circumstance, sex ratio is selected X 2 test for use, and two groups of age ratios are selected the independent sample t check for use, and two groups of impedance datas relatively adopt the check of duplicate detection mean, with
p<0.05 significant difference is arranged.
2. result
(1) the H14 electrode with composite conductive liquid and inlet electrode with composite conductive liquid impedance variation referring to Fig. 5.Inlet electrode with composite conductive liquid (KCl solution+nontoxic liquid detergent) and H14 electrode with composite conductive liquid (KCl solution+nontoxic liquid detergent) all during degrease, in two groups the resistance value of different time points have significant difference (F=138.050,
p=0.000); Simultaneously two groups of impedance variation trend also different (F=17.355,
p=0.000), promptly along with time lengthening, along with time lengthening, impedance is more stable with composite conductive liquid group for the H14 electrode, and inlet electrode with composite conductive liquid group along with time lengthening, its impedance obviously raises.Between two groups the different time point impedance variant (F=138.050,
p=0.000), two groups of impedances simultaneously in time variation tendency different (F=17.355,
p=0.000).
(2) the H14 electrode with 2%NaCl solution and inlet electrode with 2%NaCl solution impedance variation referring to Fig. 6.Inlet electrode is with 2%NaCl solution and H14 electrode during with the equal degrease of 2%NaCl solution, in two groups the resistance value of different time points have significant difference (F=82.479,
p=0.000), promptly in different time points, in 2%NaCl solution, the H14 electrode is lower than the inlet electrode impedance.But two groups of impedance variation trend identical (F=0.251,
p=0.617), promptly along with time lengthening, H14 electrode and inlet electrode at 2%NaCl solution middle impedance along with time lengthening all raises.The H14 electrode is with 2%NaCl solution and the inlet electrode impedance variation with 2%NaCl solution different time points.Two groups of different time point impedance variant (F=82.479,
p=0.000), two groups of impedances in time variation tendency identical (F=0.251,
p=0.617).
(3) conclusion: the clinical use primary part observation 12 routine healthy subjects of H14 EEGelectrode; Be divided into 2 groups (24 groups of data) at random; Detect contrast U.S.'s Medtronic (Medtronic) respectively, the Ref.9013E1321 EEGelectrode with composite conductive liquid, 2%NaCl solution and H14 EEGelectrode with composite conductive liquid, 2%NaCl solution middle impedance situation.Through finding that relatively H14 EEGelectrode group is along with the different time points impedance variation is significantly less than contrast U.S.'s Medtronic (Medtronic), Ref.9013E1321 EEGelectrode group impedance (H14 electroencephalogram waveform figure is referring to Fig. 7).Can think that H14 EEGelectrode various aspects of performance all obviously surpasses existing level; Compare with import EEGelectrode U.S. Medtronic (Medtronic), Ref.9013E1321,, be used composite conductive liquid owing on the structure of H14 EEGelectrode design hopper is housed; Make in the test process electrode potential more stable; Figure is clear, and capacity of resisting disturbance is strong, and resolution is higher; Baseline is steady, and it is little to drift about.
In order to reduce cost, to be convenient to promote and to launch, this research is chosen nontoxic liquid detergent and has been carried out the Skin Resistance experiment as surfactant.
During measurement, be clipped in two counter electrode on the forearm of 10cm, measure Skin Resistance (referring to Fig. 8).Wherein (A, A ') electrode is that the nontoxic liquid detergent of 1%KCl+1% is made conductive liquid, and (B, B ') electrode is done conductive liquid with 1%KCl, tests 6 people altogether.Survey unit area impedance with DDS-11A type electric conductivity appearance, be converted into impedance again.Experimental result is referring to Fig. 9.
Can know that by Fig. 9, table 2 data analysis the conductive liquid that adds nontoxic liquid detergent through clinical trial reduces about more than 50% than the 1%KCl conductive liquid Skin Resistance that does not add nontoxic liquid detergent.Composite conductive liquid can select that to contain mass ratio be the nontoxic liquid detergent solution of 1%KCl+1% for use, water configuration 100%.
Claims (2)
1. EEGelectrode; It is characterized in that, comprise electrode slice (1), gauze (2), O-ring seals (3), hopper passage (4), Cotton Gossypii (5), hopper (6), hopper lid (7), electrode shell (8), fine silver joint (9), filamentary silver lead (10), lead channels (11), fixed mount (12) and location-plate (13), electrode slice (1) intercalation electrode housing (8) bottom; Electrode slice (1) is affixed with an end of filamentary silver lead (10); Electrode slice (1) through lead channels (11) and fine silver joint (9) welding, is provided with hopper passage (4) through filamentary silver lead (10) in the hopper (6), hopper (6) is positioned at electrode slice (1) top; And in the electrode shell of packing into (8); Hopper lid (7) is fitted with hopper (6) mutually, and it is right mutually with the O-ring seals (3) of placement to be provided with groove apart from electrode shell (8) bottom, through O-ring seals (3) fixedly Cotton Gossypii (5) and gauze (2); Cotton Gossypii (5) places in the hopper (6); And extend to electrode slice (1) surface through hopper passage (4), and gauze (2) covers on the Cotton Gossypii (5) on electrode slice (1) surface, and electrode shell (8) is fixing with fixed mount (12); Fixed mount (12) is connected through nut with location-plate (13), and electrode slice (1) is that groove is cup-shaped.
2. a kind of EEGelectrode according to claim 1 is characterized in that, the base material of electrode slice (1) is selected the Ag-AgCl composite for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204959902U CN202408896U (en) | 2011-12-03 | 2011-12-03 | Electroencephalogram electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204959902U CN202408896U (en) | 2011-12-03 | 2011-12-03 | Electroencephalogram electrode |
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| CN202408896U true CN202408896U (en) | 2012-09-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512163A (en) * | 2011-12-03 | 2012-06-27 | 干沁怡 | Electroencephalogram electrode |
| CN102871657A (en) * | 2012-10-16 | 2013-01-16 | 中国人民解放军国防科学技术大学 | System and method for collecting electroencephalogram signal on basis of impedance self-adaption |
| CN103932704A (en) * | 2013-01-23 | 2014-07-23 | 上海帝仪科技有限公司 | Skin contact device for wet electrode, wet electrode liquid storage box and brain wave collecting electrode with wet electrode liquid storage box |
| CN104241934A (en) * | 2013-06-24 | 2014-12-24 | 上海帝仪科技有限公司 | Electrode assembly |
| CN113855033A (en) * | 2021-11-18 | 2021-12-31 | 心仪脑(上海)信息技术有限公司 | A saline electrode EEG cap that is easy to assemble and disassemble and can be flexibly positioned and refilled |
-
2011
- 2011-12-03 CN CN2011204959902U patent/CN202408896U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512163A (en) * | 2011-12-03 | 2012-06-27 | 干沁怡 | Electroencephalogram electrode |
| CN102512163B (en) * | 2011-12-03 | 2014-07-30 | 干沁怡 | Electroencephalogram electrode |
| CN102871657A (en) * | 2012-10-16 | 2013-01-16 | 中国人民解放军国防科学技术大学 | System and method for collecting electroencephalogram signal on basis of impedance self-adaption |
| CN102871657B (en) * | 2012-10-16 | 2014-04-02 | 中国人民解放军国防科学技术大学 | System and method for collecting electroencephalogram signal on basis of impedance self-adaption |
| CN103932704A (en) * | 2013-01-23 | 2014-07-23 | 上海帝仪科技有限公司 | Skin contact device for wet electrode, wet electrode liquid storage box and brain wave collecting electrode with wet electrode liquid storage box |
| CN104241934A (en) * | 2013-06-24 | 2014-12-24 | 上海帝仪科技有限公司 | Electrode assembly |
| CN104241934B (en) * | 2013-06-24 | 2016-08-24 | 上海帝仪科技有限公司 | Electrode assembly |
| CN113855033A (en) * | 2021-11-18 | 2021-12-31 | 心仪脑(上海)信息技术有限公司 | A saline electrode EEG cap that is easy to assemble and disassemble and can be flexibly positioned and refilled |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120905 Effective date of abandoning: 20140730 |
|
| RGAV | Abandon patent right to avoid regrant |