CN107468245A - The brain electrode of brain wave monitoring - Google Patents
The brain electrode of brain wave monitoring Download PDFInfo
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- CN107468245A CN107468245A CN201610398966.4A CN201610398966A CN107468245A CN 107468245 A CN107468245 A CN 107468245A CN 201610398966 A CN201610398966 A CN 201610398966A CN 107468245 A CN107468245 A CN 107468245A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/6803—Head-worn items, e.g. helmets, masks, headphones or goggles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6814—Head
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Abstract
The present invention relates to a kind of brain electrode for brain wave monitoring；Electrode stem, adjusting nut, electrode stem spring and the electrode fixed block that the brain electrode contains electrode body, is vertically arranged；The upper surface of electrode fixed block is provided with the step through-hole for being used for installing electrode stem, the upper and lower part of step through-hole inwall is respectively equipped with top bar and got out of a predicament or an embarrassing situation, the lower end of electrode body and electrode stem connects, electrode stem spring housing is on electrode stem, adjusting nut is by being threadably mounted at the top of electrode stem, the lateral surface of electrode stem bottom is provided with the first outwardly locating part, between electrode stem spring and the first locating part are blocked in top bar and got out of a predicament or an embarrassing situation；Bolt hole is additionally provided with the upper surface of electrode fixed block, the side of electrode fixed block is provided with the electrode fixed installation groove of a transverse direction, and bolt hole is fixedly mounted inside groove with electrode and connected, and fixing bolt is provided with bolt hole；Installing/dismounting of the present invention is quick, and position adjustment is convenient, flexible, quick, and the contact with head is reliable.
Description
Technical field
The present invention relates to a kind of brain wave monitoring device, more particularly to a kind of brain electrode for brain wave monitoring.
Background technology
Brain wave is brain in activity, what the postsynaptic potential that a large amount of neurons synchronously occur was formed after summation, it is overall reflection of the bioelectrical activity in cerebral cortex or scalp surface of cranial nerve cell, and the monitoring of brain wave has been widely used in existing clinical practice.
In traditional brain wave monitoring device, the wearing process of brain electrode is sufficiently complex, and operating process is loaded down with trivial details, tediously long.Generally, first have to make patient check the previous day hair washing, to remove head grease；During inspection, first special elastic cap is worn on the head, then the hair for placing brain electrode position is separated with comb, exposure scalp, with 75% ethanol scalp with degreasing, then brain electrode is pressed into required position (such as bilateral volume, top, pillow, temples) to be clipped under elastic, and with hair is pushed down under brain electrode, so just completes the installation of an electrode；After all brain electrodes install, the electrode holder on lead noseplate is clipped one by one by the order at the positions such as bilateral volume, top, pillow, temporo again, and it is noted that electrode holder puts order (being pressed from both sides back after the completion of collection signal by this reverse sequence), so far patient's electroencephalographic electrode installation process side, which accuses, completes.General patient, which does conventional 16 and leads electroencephalogram, will install 19 brain electrodes, the more skilled operator of installation brain electrode typically uses 6-8 minutes, unskilled person is very loaded down with trivial details with 10 minutes, or even to 15-20 minutes, whole operation process, and easily get position, the wrong electrode of folder wrong, doctor is spent in the placement of brain electrode the substantial amounts of time, and operating efficiency is very low, particularly in physical examination, person to be checked flocks together, and doctor is even more in a rush.Electrode holder is dismantled after finishing a electroencephalogram case history; together with making wire intertwist when the order of dismounting is inconsistent with erection sequence; at this moment separated time will be removed with the substantial amounts of quality time; and wire can be usually pulled during separated time; if things go on like this it is easy for causing the welding position of brain electrode the end of a thread to be broken, is checked so as to be delayed.Crocodile clip is typically used in the connection of conducting wire and brain electrode, but crocodile clip easily gets rusty, in order to not influence normal use, it is necessary to often change crocodile clip, this will result in the very big expense of hospital, waste resource.
Traditional brain electricity cap is made of rubber strip elastic band, because of patient's head dummy individual difference, to be pulled the size and shape of adjustment electrode cap every time, be have impact on the operating efficiency of doctor；Moreover, can only be according to 10-20 rule rough estimate Position Approximates, because everyone head dummy is inconsistent when placing brain electrode, inconvenience goes to measure with scale label, it can not accomplish that precise quantification is placed to electrode, so that the figure collected is just not necessarily the correspondence position of system requirements, influence diagnosis effect.
The rubber strip of brain electricity cap or the service life of soft band are shorter, the uneven phenomenon of pulling force just occurs after to certain time, cause individual electrode contact bad, at this moment, doctor will adjust rubber strip, but influence whether so repeatedly to adjust with good electrode again, substantial amounts of Diagnostic Time is wasted, have impact on operating efficiency.
For doctor when removing brain electrode to patient, often one unclamps brain electricity cap rubber strip, and some electrodes will be dropped to voluntarily on the ground, and the meeting also having is wrapped on patient's hair, causes unnecessary embarrassment, unnecessary trouble is also caused to patient.
Following point be present in traditional brain electrode：
A, the installation of traditional brain electrode is to be pressed in using the traction force of flexible material on electrode crossbeam, electrode body is allowed to be contacted with patient's scalp, flexible material is usually to use netted cap made of rubber bar, its service life is shorter, and when its aging, the drawing of rubber bar is with regard to uneven, cause the traction force to each brain electrode inconsistent, prevent some brain electrodes from fixing very well, and the influence of the brain electrode to fixing can be also caused in adjustment, waste Diagnostic Time.Therefore, some producers just make the neck on electrode crossbeam into via, installed with rubber bar on electrode via, although this method solves the problems, such as brain electrode self falling, but the problem of new is generated, after brain electricity cap is removed from patients head, brain electrode is still on brain electricity cap, the inconvenient keeping to brain electrode is more inconvenient to carry out chlorination experiment to brain electrode.
B, the electrode body portion of traditional brain electrode is typically provided with the hygroscopic material for being stained with conduction liquid（Such as cotton）, the outside of electrode body is encased with gauze, then is enclosed on elastic tape in electrode body, and brain electrode is contacted by conduction liquid with scalp.The shortcomings that this mode is：Because electrode body is smaller, change absorbent material, gauze and during elastic tape it is pretty troublesome, when particularly patient is more, changed one by one without the time, do not accomplish that a people one changes more, infection is so also easy to produce, to there is the patient of wound more to produce cross-infection.
C, the connection of traditional brain electrode supporting plate and electrode crossbeam is realized by movable bolt, but movable bolt can only make movement in a curve as the center of circle using movable bolt using supporting plate in certain angle, in actual use, the direction of motion of supporting plate is to make what any direction moved with the change of different patient's capitiforms, so causes to fix auxiliary electrode well.
D, traditional brain electrode may be only available for brain electricity cap made of soft material（Hard material is when adjusting brain electrode position, it is easy to allows the brain electrode placed to come off, increases working doctor difficulty）, so can not be applied to made of hard material from the electric cap that beats one's brains.
The content of the invention
The technical problem to be solved in the present invention is：A kind of brain electrode for brain wave monitoring is provided, the brain electrode installing/dismounting is quick, and position adjustment is convenient, flexible, quick, and the contact with head is reliable.
Technical scheme：
A kind of brain electrode for brain wave monitoring, contain electrode body, the electrode stem being vertically arranged, adjusting nut, electrode stem spring, fixing bolt and electrode fixed block；The upper surface of electrode fixed block is provided with the step through-hole for being used for installing electrode stem, the upper and lower part of step through-hole inwall is respectively equipped with top bar and got out of a predicament or an embarrassing situation, top bar is rank of falling from power, get out of a predicament or an embarrassing situation as positive step, the lower end of electrode body and electrode stem connects, electrode stem spring housing is on electrode stem, the lateral surface of electrode stem is provided with screw thread, adjusting nut is by being threadably mounted at the top of electrode stem, the lateral surface of electrode stem bottom is provided with the first outwardly locating part, electrode stem spring is located above the first locating part, when electrode stem is arranged in step through-hole, between electrode stem spring and the first locating part are blocked in top bar and got out of a predicament or an embarrassing situation, adjusting nut is blocked in above the upper outlet of step through-hole, the lower end of electrode stem is stretched out from the lower outlet of step through-hole；Bolt hole is additionally provided with the upper surface of electrode fixed block, the side of electrode fixed block is provided with the electrode fixed installation groove of a transverse direction（For placing the electrode fix bar of brain electricity cap or rubber bar）, with being connected inside electrode fixed installation groove, fixing bolt is arranged in bolt hole bolt hole；Electrode body is electric conductor.
The external diameter of adjusting nut is more than the internal diameter of the upper outlet of step through-hole, and the external diameter of electrode stem spring is more than the internal diameter of the upper outlet of step through-hole, and the external diameter of the first locating part is more than the internal diameter of the lower outlet of step through-hole.
During practical application, electrode fixed block can be designed to split-type structural, in favor of the assembling of each part.
The upper surface of electrode body is fixedly connected with a ball by montant, the lower end of electrode stem is provided with a ball bowl, ball is arranged in ball bowl, the external diameter of ball matches with the internal diameter size of ball bowl, so that ball freely rotates in ball bowl, electrode body is connected by the cooperation of ball and ball bowl and the lower end of electrode stem.
During actual use, the lower surface of electrode body and the head contact of people, the combination of ball and ball bowl can make electrode body with the radian of head part the free deflection in certain angle, make electrode body natural all the time perpendicular to scalp, ensure electrode body and the reliability and comfortableness during head contact.
The side of electrode stem contains the anti-rotation plane for being parallel to electrode stem axis, and anti-rotation plane can be located at the top or/and bottom of electrode stem, and the inwall of step through-hole is provided with the plane coordinated with the anti-rotation plane.
During practical application, two anti-rotation being parallel to each other planes can be set respectively in the both sides of electrode stem；During rotating adjusting nut, electrode stem can only move up and down under the limitation of anti-rotation plane, and can not be rotated with adjusting nut.
The pressure sensor of annular and the spring stop piece of annular are set with electrode stem, pressure sensor is arranged on above spring stop piece, and pressure sensor and spring stop piece are blocked between top bar and electrode stem spring.
The inside of electrode body is hollow-core construction, and electrode stem is hollow stem；Under shed is provided with the middle part of the lower surface of electrode body, the inside of electrode body is in communication with the outside by under shed, and the lower surface periphery of electrode body is provided with N number of downwardly convex electrode contact head, and the upper surface of electrode body is provided with liquid injection hole, and liquid injection hole inside electrode body with connecting；The connecting wire electrically connected with electrode body is entered inside electrode stem by the threading hole of electrode stem bottom, and is passed from the upper end of electrode stem；The junction of connecting wire and electrode body is electrode connection points.
Or the inside of electrode body is hollow-core construction, electrode stem is hollow stem；The upper surface middle part of electrode body and the lower end of electrode stem are directly connected to, the upper surface middle part of electrode body is provided with upper through hole, under shed is provided with the middle part of the lower surface of electrode body, the inside of electrode body is by upper through hole with being connected inside electrode stem, the inside of electrode body is also in communication with the outside by under shed, and the lower surface periphery of electrode body is provided with N number of downwardly convex electrode contact head；Electrode stem is electric conductor.
The top of electrode contact head is arranged in the contact head mounting hole on electrode body lower surface periphery, is connected through a screw thread between electrode contact head and contact head mounting hole.
Or, the top of electrode contact head is arranged in the contact head mounting hole on electrode body lower surface periphery, contact head mounting hole is up big and down small stepped hole, the top of electrode contact head is arranged in the bottom aperture of stepped hole, the contact locating part of electrode contact head upper end is blocked at the step of stepped hole, touch spring is installed in the macropore on stepped hole top, the closing suitable for reading of the macropore, the external diameter of touch spring is less than the external diameter of contact locating part, the upper end of electrode contact head is electrically connected by wire with electrode body, the wire is positioned in the metallic channel in electrode body, and the wire is connected electrically on electrode connection points；It is connected through a screw thread between the upper end of electrode contact head and contact locating part；Electrode contact head can freely stretch in the presence of touch spring, in favor of contact of the electrode body with head.
During practical application, electrode body can be designed to the assembly of upper polar body and lower polar body, stepped hole is located on the upper surface of lower polar body, and the lower surface of upper polar body and the upper surface of lower polar body link together；When assembling the electrode body, electrode contact head, touch spring and wire can be first installed in the stepped hole of upper polar body, then upper polar body is bonded on lower polar body.
The lateral surface of electrode body bottom is provided with a ring annular groove, and the internal cavities of electrode body are upper big and bottom samll shape cavity, and electrode body is cylinder（Such as cylinder）, under shed is shaped as circle, and electrode contact head is cylinder, and the lower end of cylinder connects a ball, and the external diameter of ball is more than the external diameter of cylinder, and N number of electrode contact head is evenly distributed on the lower surface periphery of electrode body.
One layer of liquid-adsorption layer made of imbibition material is wrapped up in the outer surface of electrode body bottom, and liquid-adsorption layer also extends to the inside of electrode body by under shed, and electrode contact head stretches out from liquid-adsorption layer.
Imbibition material is sponge or cotton；Liquid-adsorption layer is used for absorbing conduction liquid, and conduction liquid can inject from hollow electrode stem upper end or liquid injection hole；The liquid-adsorption layer for absorbing conduction liquid increases contact area between electrode body and scalp, makes that the contact between electrode body and scalp is more reliable, contact impedance is lower, the signal of collection is more stable.
The up big and down small cavity in the annular groove in electrode body lower outside face, electrode body inside and the ball of electrode contact head lower end are advantageous to fixation of the liquid-adsorption layer in electrode body, prevent liquid-adsorption layer from being come off from electrode body.
When wrapping up liquid-adsorption layer in electrode body（Used as wet electrode）When, electrode contact head can prevent liquid-adsorption layer from too being extruded and conduction liquid is flowed away, and ensure that the contact between electrode body and scalp is more reliable；When not wrapping up liquid-adsorption layer in electrode body（Used as dry electrode）When, the space between each electrode contact head can accommodate hair, so as to contact more reliable between electrode contact head and scalp, electrode contact head can reduce polarizing voltage, in the case where contact area is constant, can make that electrode body contacts more preferably with scalp, baseline is not easy drift.
The second outwardly locating part is additionally provided with the lateral surface of electrode stem bottom, second locating part is located at the outside exported under step through-hole, the external diameter of second locating part is more than the internal diameter that exports under step through-hole, between the second locating part and the first locating part between be separated with a segment distance；The groove insied width that groove is fixedly mounted in electrode is more than width of rebate, and the lower end of fixing bolt is fixed with banking stop, and banking stop makes fixing bolt when being adjusted up without departing from bolt hole；The top of electrode stem lateral surface is provided with screw thread；The upper end of electrode stem is provided with electrode nut, and the second locating part is located at the top of threading hole；The material of electrode body is Au, Ag/AgCl or the material compatible with tissue.
The connecting wire passed from the upper end of electrode stem is connected to the input of ultra-high-impedance amplifier, and the signal wire of pressure sensor is connected in pressure sensor circuit after being passed from the signal line three-way hole on electrode fixed block.
The application method of the brain electrode is as follows：
First, doctor is placed to brain electricity cap patients head and adjusted and fixes；Then, the fixing bolt on brain electrode is unscrewed, by brain electrode close to brain electricity cap, the electrode fix bar on brain electricity cap or rubber bar is located at electrode and is fixedly mounted in groove, be then tightened bolt, and at this moment, brain electrode is just installed on patient's head；It can determine that whether contact of the brain electrode with patients head be normal by the waveform of electrode impedance measuring circuit or Computer display, it is such as abnormal, rotate the adjusting nut on brain electrode, the electrode body of brain electrode is set to be close to patient's scalp under the traction force effect of brain electricity cap with suitable pressure, until finally installing brain electrode.
After EEG signals have detected, the fixing bolt on brain electrode can be unscrewed, brain electrode is removed from the electrode fix bar on brain electricity cap or rubber bar one by one；When preserving brain electrode, electrode body can be encased with flexible material, then is enclosed on annular groove and fixed with elastic tape, can so slow down the oxidation of electrode body, reduce corrosion of the outside air to electrode body.
The output signal size of pressure sensor on brain electrode is directly proportional to the pressure that electrode stem spring is subject to, with the length inverse ratio of electrode stem spring, therefore, electrode body can be extrapolated according to the size of pressure sensor output signal the distance between to electrode fixed block, so as to draw electrode body to the distance length of the electrode fix bar of brain electricity cap, the distance length indicated further according to the scale label of electrode fix bar, draw the position relationship between each brain electrode, head dummy surface three dimension model is established according to the position relationship between each brain electrode, real-time display 10-20 rules descend brain electrode actually real position, it is easy to instruct doctor to adjust electrode position, the eeg data of the real-time display position simultaneously；When adjusting brain electrode, the pressure data of pressure sensor is exported to after computer, and computer capacity monitors electrode body and patients head's contact size in real time, and computer being capable of alarm during beyond setting range；This two set the upgrading being easy to traditional brain electric equipment, improve product specification.
Beneficial effects of the present invention：
1. the electrode stem of the present invention is arranged in the step through-hole of electrode fixed block upper surface, electrode body is located at the lower end of electrode stem, the height of electrode body can be adjusted by the adjusting nut on electrode stem, the angle of electrode body can freely be adjusted by the cooperation of ball and ball bowl, not only flexibly, conveniently, and contact of the electrode body with patients head is relatively reliable for position adjustment for whole brain electrode；In addition, when carrying out position adjustment to a brain electrode, other brain electrodes adjusted are unaffected, and improve the operating efficiency of whole brain wave monitoring.
2. the present invention need to only unscrew the fixing bolt of brain electrode when mounted, the electrode fix bar on brain electricity cap or rubber bar is set to be placed in the electrode fixed installation groove of brain electrode, be then tightened bolt；Fixing bolt need to be only unscrewed during dismounting, brain electrode is removed from the electrode fix bar on brain electricity cap or rubber bar, installing/dismounting is quick and convenient.
3. the liquid-adsorption layer of the electrode body bottom of the present invention increases the contact area between electrode body and scalp, make the contact between electrode body and scalp more reliable；Space between electrode contact head can accommodate hair, moreover it is possible to prevent liquid-adsorption layer from too being extruded and conduction liquid is flowed away, make to contact between electrode body and scalp more reliable.Traditional brain electrode is when gathering signal, and because electrode body and scalp contact area are big, what is inevitably touched is hair, rather than scalp, and this just needs doctor to be chosen out with instrument and fixed hair, then places brain electrode, cumbersome；Using electrode contact head contact scalp in the present invention, electrode contact head small volume, quantity are more, under the natural pressure of electrode stem spring and touch spring, hair can be avoided automatically, naturally scalp is contacted, multiple electrodes contact head points to scalp simultaneously, as long as there is an electrode contact head to touch scalp, with regard to EEG signals can be collected, the probability for avoiding hair is increased, greatlys save the time of doctor's adjustment, experiment proves, as long as the adjustment of brain electricity cap is suitable, brain electrode hardly with adjusting with regard to that can collect EEG signals again.
4. up big and down small cavity is advantageous to fixation of the liquid-adsorption layer in electrode body inside the annular groove and electrode body in the electrode body lower outside face of the present invention, prevent liquid-adsorption layer from being come off from electrode body, and the structure of electrode body bottom makes replacing liquid-adsorption layer quick and convenient（Directly liquid-adsorption layer is torn）, a people one can be achieved and change, prevent cross-infection.
（Four）, brief description of the drawings：
Fig. 1 is one of structural representation of brain electrode for brain wave monitoring；
Fig. 2 is two of the structural representation for the brain electrode of brain wave monitoring；
Fig. 3 is three of the structural representation for the brain electrode of brain wave monitoring；
Fig. 4 is four of the structural representation for the brain electrode of brain wave monitoring；
Fig. 5 is the bottom surface structure schematic diagram of electrode body；
Fig. 6 is the mplifying structure schematic diagram of cross section at electrode stem A-A in Fig. 1~Fig. 4；
Fig. 7 is the structural representation that the brain electrode monitored for brain wave is arranged on brain electricity cap.
（Five）, embodiment：
Embodiment one：Referring to Fig. 1, Fig. 5, Fig. 6, Fig. 7, in figure, the brain electrode for brain wave monitoring
Used as dry electrode, the brain electrode contains electrode body 11, the electrode stem being vertically arranged 1, adjusting nut 2, electrode stem spring 3, fixing bolt 4 and electrode fixed block 5；The upper surface 6 of electrode fixed block 5 is provided with a step through-hole 7 for being used to install electrode stem 1, the upper and lower part of the inwall of step through-hole 7 is respectively equipped with top bar 701 and gets out of a predicament or an embarrassing situation 702, top bar 701 is rank of falling from power, get out of a predicament or an embarrassing situation 702 is positive step, electrode body 11 is connected with the lower end of electrode stem 1, electrode stem spring 3 is sleeved on electrode stem 1, the lateral surface of electrode stem 1 is provided with screw thread, adjusting nut 2 is provided with the first outwardly locating part 8 by being threadably mounted at the top of electrode stem 1, the lateral surface of the bottom of electrode stem 1（It can be disc）Electrode stem spring 3 is located above the first locating part 8, when electrode stem 1 is arranged in step through-hole 7, the locating part 8 of electrode stem spring 3 and first is blocked in top bar 701 and got out of a predicament or an embarrassing situation between 702, adjusting nut 2 is blocked in above the upper outlet 703 of step through-hole 7, and the lower end of electrode stem 1 is stretched out from the lower outlet 704 of step through-hole 7；Bolt hole 9 is additionally provided with the upper surface of electrode fixed block 5, the side of electrode fixed block 5 is provided with the electrode fixed installation groove 10 of a transverse direction（For placing the electrode fix bar 80 of brain electricity cap）, with being connected inside electrode fixed installation groove 10, fixing bolt 4 is arranged in bolt hole 9 bolt hole 9；Electrode body 11 is electric conductor.
The external diameter of adjusting nut 2 is more than the internal diameter of the upper outlet 703 of step through-hole 7, and the external diameter of electrode stem spring 3 is more than the internal diameter of the upper outlet 703 of step through-hole 7, and the external diameter of the first locating part 8 is more than the internal diameter of the lower outlet 704 of step through-hole 7.
During practical application, electrode fixed block 5 is designed to split-type structural, in favor of the assembling of each part.
The upper surface of electrode body 11 is fixedly connected with a ball 13 by montant 12, the lower end of electrode stem 1 is provided with a ball bowl 14, ball 13 is arranged in ball bowl 14, the external diameter of ball 13 matches with the internal diameter size of ball bowl 14, so that ball 13 freely rotates in ball bowl 14, electrode body 11 is connected by the cooperation of ball 13 and ball bowl 14 with the lower end of electrode stem 1.
During actual use, the lower surface of electrode body 11 and the head contact of people, the combination of ball 13 and ball bowl 14 can make electrode body 11 with the radian of head part the free deflection in certain angle, make electrode body natural all the time perpendicular to scalp, ensure electrode body 11 and the reliability and comfortableness during head contact.
The side of electrode stem 1 contains the anti-rotation plane 15 for being parallel to the axis of electrode stem 1, and anti-rotation plane 15 is located at the upper and lower part of electrode stem 1, and the inwall of step through-hole 7 is provided with the plane coordinated with the anti-rotation plane 15.
During practical application, two anti-rotation being parallel to each other planes 15 are set respectively in the both sides of electrode stem 1；During rotating adjusting nut 2, electrode stem 1 can only move up and down under the limitation of anti-rotation plane 15, and can not be rotated with adjusting nut 2.
The pressure sensor 16 of annular and the spring stop piece 17 of annular are set with electrode stem 1, pressure sensor 16 is arranged on above spring stop piece 17, and pressure sensor 16 and spring stop piece 17 are blocked between top bar 701 and electrode stem spring 3.
The inside of electrode body 11 is hollow-core construction, and electrode stem 1 is hollow stem；Under shed 18 is provided with the middle part of the lower surface of electrode body 11, the inside of electrode body 11 is in communication with the outside by under shed 18, the lower surface periphery of electrode body 11 is provided with 12 downwardly convex electrode contact heads 19, and the upper surface of electrode body 11 is provided with liquid injection hole 20, and liquid injection hole 20 connects with the inside of electrode body 11；The connecting wire 21 electrically connected with electrode body 11 enters the inside of electrode stem 1 221 by the threading hole 22 of the bottom of electrode stem 1, and is passed from the upper end of electrode stem 1；The junction of connecting wire 21 and electrode body 11 is electrode connection points 40.
The top of electrode contact head 19 is arranged in the contact head mounting hole 23 on the lower surface periphery of electrode body 11, is connected through a screw thread between electrode contact head 19 and contact head mounting hole 23.
The lateral surface of the bottom of electrode body 11 is provided with a ring annular groove 28, the internal cavities of electrode body 11 are upper big and bottom samll shape cavity, electrode body 11 is cylinder, under shed 18 is shaped as circle, electrode contact head 19 is cylinder 192, the lower end of cylinder 192 connects a ball 191, and the external diameter of ball 191 is more than the external diameter of cylinder 192, and 12 electrode contact heads 19 are evenly distributed on the lower surface periphery of electrode body 11.
Space between each electrode contact head 19 can accommodate hair, so as to contacted between electrode contact head 19 and scalp more reliable, electrode contact head 19 can reduce polarizing voltage, in the case where contact area is constant, can make that electrode body 11 contacts more preferably with scalp, baseline is not easy drift.
The second outwardly locating part 31 is additionally provided with the lateral surface of the bottom of electrode stem 1（It can be disc）, the second locating part 31 is located at the outside of the outlet of step through-hole 7 times 704, and the external diameter of the second locating part 31 is more than the internal diameter that step through-hole exports 704 for 7 time, between the second locating part 31 and the first locating part 8 between be separated with a segment distance；The groove insied width that groove 10 is fixedly mounted in electrode is more than width of rebate, and the lower end of fixing bolt 4 is fixed with banking stop 30, and banking stop 30 makes fixing bolt 4 when being adjusted up without departing from bolt hole 9；The top of the lateral surface of electrode stem 1 is provided with screw thread；The upper end of electrode stem 1 is provided with electrode nut 41, and the second locating part 31 is located at the top of threading hole 22；The material of electrode body 11 is Au, Ag/AgCl or the material compatible with tissue.
The connecting wire 21 passed from the upper end of electrode stem 1 is connected to the input of ultra-high-impedance amplifier, and the signal wire of pressure sensor 16 is connected in pressure sensor circuit after being passed from the signal line three-way hole on electrode fixed block 5.
The application method of the brain electrode 81 is as follows：
First, doctor is placed to brain electricity cap patients head and adjusted and fixes；Then, the fixing bolt 4 on brain electrode 81 is unscrewed, by brain electrode 81 close to brain electricity cap, the electrode fix bar 80 on brain electricity cap is located at electrode and be fixedly mounted in groove 10, be then tightened bolt 4, and at this moment, brain electrode 81 is just installed on patient's head；It can determine that whether contact of the brain electrode 81 with patients head be normal by the waveform of electrode impedance measuring circuit or Computer display, it is such as abnormal, rotate the adjusting nut 2 on brain electrode 81, the electrode body 11 of brain electrode 81 is set to be close to patient's scalp under the traction force effect of brain electricity cap with suitable pressure, until finally installing brain electrode 81.
After EEG signals have detected, the fixing bolt 4 on brain electrode 81 can be unscrewed, brain electrode 81 is removed from the electrode fix bar 80 on brain electricity cap one by one；When preserving brain electrode 81, electrode body 11 can be encased with flexible material, then is enclosed on annular groove 28 and fixed with elastic tape, can so slow down the oxidation of electrode body 11, reduce corrosion of the outside air to electrode body.
The output signal size of pressure sensor 16 on brain electrode 81 is directly proportional to the pressure that electrode stem spring 3 is subject to, with the length inverse ratio of electrode stem spring 3, therefore, electrode body 11 can be extrapolated according to the size of the output signal of pressure sensor 16 and arrives the distance between electrode fixed block 5, so as to draw electrode body 11 to the distance length of the electrode fix bar 80 of brain electricity cap, the distance length indicated further according to the scale label of electrode fix bar 80, draw the position relationship between each brain electrode 81, head dummy surface three dimension model is established according to the position relationship between each brain electrode 81, the lower actual real position of brain electrode 81 of real-time display 10-20 rules, it is easy to instruct doctor to adjust electrode position, the eeg data of the real-time display position simultaneously；When adjusting brain electrode 81, the pressure data of pressure sensor 16 is exported to after computer, and computer capacity monitors electrode body 11 and patients head's contact size in real time, and computer being capable of alarm during beyond setting range；This two set the upgrading being easy to traditional brain electric equipment, improve product specification.
Embodiment two：Referring to Fig. 2, Fig. 5, Fig. 6, Fig. 7, numbering and the identical of embodiment one in figure, the meaning of representative is identical, and its course of work is also essentially identical, and something in common does not repeat, and is a difference in that：The brain electrode for being used for brain wave monitoring uses as wet electrode, wrap up one layer of liquid-adsorption layer 29 made of imbibition material in the outer surface of the bottom of electrode body 11, liquid-adsorption layer 29 also extends to the inside of electrode body 11 by under shed 18, and electrode contact head 19 stretches out from liquid-adsorption layer 29.
Imbibition material is sponge or cotton；Liquid-adsorption layer 29 is used for absorbing conduction liquid, and conduction liquid injects from liquid injection hole 20；The liquid-adsorption layer 29 for absorbing conduction liquid increases contact area between electrode body 11 and scalp, makes that the contact between electrode body 11 and scalp is more reliable, contact impedance is lower, the signal of collection is more stable.
The up big and down small cavity in the annular groove 28 in the lower outside face of electrode body 11, the inside of electrode body 11 and the ball 191 of the lower end of electrode contact head 19 are advantageous to fixation of the liquid-adsorption layer 29 in electrode body 11, prevent liquid-adsorption layer 29 from being come off from electrode body 11.
Electrode contact head 19 can prevent liquid-adsorption layer 29 from too being extruded and conduction liquid is flowed away, and ensure that the contact between electrode body 11 and scalp is more reliable.
Embodiment three：Referring to Fig. 3, Fig. 5, Fig. 6, Fig. 7, numbering and the identical of embodiment one in figure, the meaning of representative is identical, and its course of work is also essentially identical, and something in common does not repeat, and is a difference in that：The brain electrode for being used for brain wave monitoring uses as wet electrode, the top of electrode contact head 19 is arranged in the contact head mounting hole 24 on the lower surface periphery of electrode body 11, contact head mounting hole 24 is up big and down small stepped hole, the top of electrode contact head 19 is arranged in the bottom aperture 241 of stepped hole, the contact locating part 25 of the upper end of electrode contact head 19 is blocked at the step of stepped hole, touch spring 26 is installed in the macropore 242 on stepped hole top, the closing suitable for reading of the macropore 242, the external diameter of touch spring 26 is less than the external diameter of contact locating part 25, the upper end of electrode contact head 19 is electrically connected by wire 27 with electrode body 11, the wire 27 is positioned in the metallic channel in electrode body 11, and the wire 27 is connected electrically on electrode connection points 40；It is connected through a screw thread between the upper end of electrode contact head 19 and contact locating part 25；Electrode contact head 19 can freely stretch in the presence of touch spring 26, in favor of contact of the electrode body 11 with head.
During practical application, electrode body 11 is designed to the assembly of upper polar body and lower polar body, stepped hole is located on the upper surface of lower polar body, and the lower surface of upper polar body and the upper surface of lower polar body link together；When assembling the electrode body 11, electrode contact head 19, touch spring 26 and wire 27 can be first installed in the stepped hole of upper polar body, then upper polar body is bonded on lower polar body.
One layer of liquid-adsorption layer 29 made of imbibition material are wrapped up in the outer surface of the bottom of electrode body 11, and liquid-adsorption layer 29 also extends to the inside of electrode body 11 by under shed 18, and electrode contact head 19 stretches out from liquid-adsorption layer 29.
Imbibition material is sponge or cotton；Liquid-adsorption layer 29 is used for absorbing conduction liquid, and conduction liquid injects from liquid injection hole 20；The liquid-adsorption layer 29 for absorbing conduction liquid increases contact area between electrode body 11 and scalp, makes that the contact between electrode body 11 and scalp is more reliable, contact impedance is lower, the signal of collection is more stable.
The up big and down small cavity in the annular groove 28 in the lower outside face of electrode body 11, the inside of electrode body 11 and the ball 191 of the lower end of electrode contact head 19 are advantageous to fixation of the liquid-adsorption layer 29 in electrode body 11, prevent liquid-adsorption layer 29 from being come off from electrode body 11.
Electrode contact head 19 can prevent liquid-adsorption layer 29 from too being extruded and conduction liquid is flowed away, and ensure that the contact between electrode body 11 and scalp is more reliable.
Example IV：Referring to Fig. 4, Fig. 5, Fig. 6, Fig. 7, numbering and the identical of embodiment two in figure, the meaning of representative is identical, and its course of work is also essentially identical, and something in common does not repeat, and is a difference in that：Delete montant 12, ball 13, ball bowl 14, liquid injection hole 20, connecting wire 21, threading hole 22, the second locating part 31 and the electrode connection points 40 in embodiment two；The upper surface middle part of electrode body 11 and the lower end of electrode stem 1 are directly connected to, the upper surface middle part of electrode body 11 is provided with upper through hole 112, the inside of electrode body 11 is connected by upper through hole 112 with the inside of electrode stem 1 221, electrode stem 1 is electric conductor, electrode stem 1 is the connection conductor of electrode body 11, and conduction liquid can inject from the hollow upper end of electrode stem 1.
Claims (13)
1. a kind of brain electrode for brain wave monitoring, containing electrode body, it is characterized in that：Also containing electrode stem, adjusting nut, electrode stem spring, fixing bolt and the electrode fixed block being vertically arranged；The upper surface of electrode fixed block is provided with the step through-hole for being used for installing electrode stem, the upper and lower part of step through-hole inwall is respectively equipped with top bar and got out of a predicament or an embarrassing situation, top bar is rank of falling from power, get out of a predicament or an embarrassing situation as positive step, the lower end of electrode body and electrode stem connects, electrode stem spring housing is on electrode stem, the lateral surface of electrode stem is provided with screw thread, adjusting nut is by being threadably mounted at the top of electrode stem, the lateral surface of electrode stem bottom is provided with the first outwardly locating part, electrode stem spring is located above the first locating part, when electrode stem is arranged in step through-hole, between electrode stem spring and the first locating part are blocked in top bar and got out of a predicament or an embarrassing situation, adjusting nut is blocked in above the upper outlet of step through-hole, the lower end of electrode stem is stretched out from the lower outlet of step through-hole；Bolt hole is additionally provided with the upper surface of electrode fixed block, the side of electrode fixed block is provided with the electrode fixed installation groove of a transverse direction, and bolt hole is fixedly mounted inside groove with electrode and connected, and fixing bolt is arranged in bolt hole；Electrode body is electric conductor.
2. the brain electrode according to claim 1 for brain wave monitoring, it is characterized in that：The upper surface of the electrode body is fixedly connected with a ball by montant, the lower end of electrode stem is provided with a ball bowl, ball is arranged in ball bowl, the external diameter of ball matches with the internal diameter size of ball bowl, so that ball freely rotates in ball bowl, electrode body is connected by the cooperation of ball and ball bowl and the lower end of electrode stem.
3. the brain electrode according to claim 1 for brain wave monitoring, it is characterized in that：The side of the electrode stem contains the anti-rotation plane for being parallel to electrode stem axis, and the inwall of step through-hole is provided with the plane coordinated with the anti-rotation plane.
4. the brain electrode according to claim 1 for brain wave monitoring, it is characterized in that：The pressure sensor of annular and the spring stop piece of annular are set with the electrode stem, pressure sensor is arranged on above spring stop piece, and pressure sensor and spring stop piece are blocked between top bar and electrode stem spring.
5. the brain electrode according to claim 1 for brain wave monitoring, it is characterized in that：The inside of the electrode body is hollow-core construction, and electrode stem is hollow stem；Under shed is provided with the middle part of the lower surface of electrode body, the inside of electrode body is in communication with the outside by under shed, and the lower surface periphery of electrode body is provided with N number of downwardly convex electrode contact head, and the upper surface of electrode body is provided with liquid injection hole, and liquid injection hole inside electrode body with connecting；The connecting wire electrically connected with electrode body is entered inside electrode stem by the threading hole of electrode stem bottom, and is passed from the upper end of electrode stem.
6. the brain electrode according to claim 5 for brain wave monitoring, it is characterized in that：The top of the electrode contact head is arranged in the contact head mounting hole on electrode body lower surface periphery, is connected through a screw thread between electrode contact head and contact head mounting hole.
7. the brain electrode according to claim 5 for brain wave monitoring, it is characterized in that：The top of the electrode contact head is arranged in the contact head mounting hole on electrode body lower surface periphery, contact head mounting hole is up big and down small stepped hole, the top of electrode contact head is arranged in the bottom aperture of stepped hole, the contact locating part of electrode contact head upper end is blocked at the step of stepped hole, touch spring is installed in the macropore on stepped hole top, the closing suitable for reading of the macropore, the external diameter of touch spring is less than the external diameter of contact locating part, and the upper end of electrode contact head is electrically connected by wire with electrode body.
8. the brain electrode according to claim 5 for brain wave monitoring, it is characterized in that：The lateral surface of the electrode body bottom is provided with a ring annular groove, the internal cavities of electrode body are upper big and bottom samll shape cavity, electrode body is cylinder, under shed is shaped as circle, electrode contact head is cylinder, the lower end of cylinder connects a ball, and the external diameter of ball is more than the external diameter of cylinder, and N number of electrode contact head is evenly distributed on the lower surface periphery of electrode body.
9. the brain electrode according to claim 1 for brain wave monitoring, it is characterized in that：The inside of the electrode body is hollow-core construction, and electrode stem is hollow stem；The upper surface middle part of electrode body and the lower end of electrode stem are directly connected to, the upper surface middle part of electrode body is provided with upper through hole, under shed is provided with the middle part of the lower surface of electrode body, the inside of electrode body is by upper through hole with being connected inside electrode stem, the inside of electrode body is also in communication with the outside by under shed, and the lower surface periphery of electrode body is provided with N number of downwardly convex electrode contact head；Electrode stem is electric conductor.
10. the brain electrode according to claim 9 for brain wave monitoring, it is characterized in that：The top of the electrode contact head is arranged in the contact head mounting hole on electrode body lower surface periphery, is connected through a screw thread between electrode contact head and contact head mounting hole.
11. the brain electrode according to claim 9 for brain wave monitoring, it is characterized in that：The lateral surface of the electrode body bottom is provided with a ring annular groove, the internal cavities of electrode body are upper big and bottom samll shape cavity, electrode body is cylinder, under shed is shaped as circle, electrode contact head is cylinder, the lower end of cylinder connects a ball, and the external diameter of ball is more than the external diameter of cylinder, and N number of electrode contact head is evenly distributed on the lower surface periphery of electrode body.
12. the brain electrode for being used for brain wave monitoring according to any one of claim 5~11, it is characterized in that：One layer of liquid-adsorption layer made of imbibition material is wrapped up in the outer surface of the electrode body bottom, and liquid-adsorption layer also extends to the inside of electrode body by the under shed, and electrode contact head stretches out from liquid-adsorption layer.
13. according to the brain electrode according to any one of claims 1 to 8 monitored for brain wave, it is characterized in that：The second outwardly locating part is additionally provided with the lateral surface of the electrode stem bottom, second locating part is located at the outside exported under the step through-hole, the external diameter of second locating part is more than the internal diameter that exports under step through-hole, between the second locating part and the first locating part between be separated with a segment distance；The groove insied width that groove is fixedly mounted in electrode is more than width of rebate, and the lower end of fixing bolt is fixed with banking stop, and the top of electrode stem lateral surface is provided with screw thread.
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| CN201610398966.4A CN107468245A (en) | 2016-06-07 | 2016-06-07 | The brain electrode of brain wave monitoring |
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| CN113229824A (en) * | 2021-05-18 | 2021-08-10 | 十堰市郧阳区人民医院 | Novel automatic electroencephalogram cap |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113229824A (en) * | 2021-05-18 | 2021-08-10 | 十堰市郧阳区人民医院 | Novel automatic electroencephalogram cap |
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