CN200994775Y - Biological impedance measuring electrode - Google Patents
Biological impedance measuring electrode Download PDFInfo
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- CN200994775Y CN200994775Y CN 200620159891 CN200620159891U CN200994775Y CN 200994775 Y CN200994775 Y CN 200994775Y CN 200620159891 CN200620159891 CN 200620159891 CN 200620159891 U CN200620159891 U CN 200620159891U CN 200994775 Y CN200994775 Y CN 200994775Y
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Abstract
The utility model relates to a biologic electric resistance anti-measuring electrode. The utility model is characterized in that the electrode comprises a sticky basal layer, an electric conducting adhesive layer, a clipping element and a lining layer; wherein the electric conducting adhesive layer, the stickiness basal layer and the lining layer are connected in order, the clipping part is designed eccentricly, the electric conducting adhesive layer is a cylinder shaped, the clipping part and the electric conducting adhesive layer are electrically connected.
Description
Technical field
The present invention relates to a kind of electrode, particularly relate to a kind of electrode that is used for bio-electrical impedance measuring.
Background technology
Bio-electrical impedance, or abbreviation impedance measurement technique, be a kind of electrical characteristics of utilizing biological tissue and organ and Changing Pattern extraction thereof and Human Physiology, the detection technique of biomedical information that pathological condition is relevant, adopt the bio-electrical impedance method can noinvasive, highly sensitive, extract corresponding electrical characteristics and change information thereof exactly.Can be used for measurement and supervision to the various electric parameters of biology, for example electrocardiography, biological impedance, electroencephalogram art or the like are included in and place electrode on the organism, measure the signal of telecommunication then during electricity irritation is carried out or in the later time.
Usually all be to adopt existing electrocardioelectrode to carry out bio-electrical impedance measuring at present at home, yet, what be known in the art is, electrocardioelectrode is a kind of passive electrode, be to measure at the current potential that human body self produces, but bio-electrical impedance measuring needs earlier measured organism to be injected little safe current, measures the reflection current potential of measured body again, thereby electrocardioelectrode is applied to be easy in the bio-electrical impedance measuring produce error.In practice, the use electrocardioelectrode takes multiple measurements and can obtain a plurality of different measured values, and often the error maximum of twice measured value can surpass 30%, thereby causes the accuracy of measured value relatively poor with repeatability.
And,, perhaps absorb the moisture of contact skin and cause and unsettledly electrically contact that the accuracy of measured value is lower when causing measuring resistance anti-because electrocardioelectrode may relax, overturn or come off from the contact position of measured organism body surface.
A kind of electrode that is widely used as earth plate in the electrosurgery field is by German Arbo
TMMedizintechnologie GmbH pfl230 D38002, the Arbo that Braunschweig produces
TMElectrode.This electrode constitutes a silver-silver chloride pole plate and avoids using the colloidal needs of electrolyte into improving contact.Such electrode is relatively large, and at some position of patient body, when restricted surface only being arranged for placing the electrode time spent, for example head just can not use.
No. 200510106313.6 application documents of Chinese patent disclose a kind of improved disposable biomedical electrode, and this electrode provides a plurality of lead junction points, therefore allow the technical staff easily to connect lead to the best junction point for electrode and patient position.Also provide and make the more effective structure of manufacturing, packing and use of biomedical electrode.The disposable biomedical electrode of this invention is leg-of-mutton, so the lead junction point can be positioned on the vertex of a triangle.Electrode can be formed by triangular base, and substrate is conducted electricity along its surface. and the electrically-conducting adhesive layer is applied on the conductive surface of substrate, is used for removably electrode being attached in patient skin.The summit of triangular base is exposed, and makes lead can be clipped in the substrate and contacts with conductive surface, to obtain electrocardiogram or other biological electric potential signal from the patient.This invention is by being provided with a plurality of junction points, make the be not easy to do body surface of measurand of electrode rise, overturn or come off, thereby reduce a kind of probability that produces error, but for because of pasting the measurement error that contact resistance difference that electrode causes causes, thereby cause repeatability difference and the not high problem of accuracy measured, still can not solve at all.And when commercial Application, the manufacturing cost of kind electrode is compared higher, has in use increased also related personnel's operating time and operating procedure simultaneously.
In addition, No. 200510106313.6 application documents of Chinese patent also disclose a kind of method and electrode that is used for biological impedance, this invention is applicable to be carried out electrical measurement or the electrode of human body injection current is disclosed human body, and this electrode is for having surface area about 18-36m
2Flexible disposable electrode in the scope, kind electrode is applied in the biological impedance especially, especially the biological impedance by using identical electrodes to finish by electric current and measurement current potential equally also discloses the bio-impedance measurement method that uses kind electrode to carry out.The electrode of this invention electrode when the biological impedance of whole human body is fixed on patient's the arm and lower limb, can not realize for example measurement of cranium portion of some particular organizations.
In a word, how obtain the higher and repeatability of accuracy measured value preferably by the bio-electrical impedance measuring electrode, guarantee the anti-concordance of each contact resistance of measuring, reduce the electrode production manufacturing cost, making things convenient for related personnel's operation, is the technical problem that those skilled in the art press for solution.
Summary of the invention
Technical problem to be solved by this invention provides a kind of bio-electrical impedance measuring electrode, so that when measuring, guarantee the anti-concordance of each contact resistance of measuring, make the higher and error amount twice measured value of the accuracy of its measured value be no more than 30%, this kind electrode can be placed at any measured body body surface position and use simultaneously.
For solving the problems of the technologies described above, the invention provides a kind of bio-electrical impedance measuring electrode, comprise adherent base bottom, conductive adhesive layer, clasp and laying; Described conductive adhesive layer, adherent base bottom are connected successively with laying, and described clasp is eccentric design, and described conductive adhesive layer is the cylinder bodily form, and described clasp is electrically connected with described conductive adhesive layer.
Preferably, the diameter of described conductive adhesive layer is more than or equal to 16mm.
Preferably, the diameter of described conductive adhesive layer is 18mm.
Preferably, the area of described conductive adhesive layer, adherent base bottom and laying increases successively, and the peripheral part that described laying exceeds described adherent base bottom has the tacky adhesion face that contacts with skin viscosity.
Preferably, described laying is a non-woven fabrics; Described clasp is electrically connected with described conductive adhesive layer by conductive layer, and described conductive layer is carbon film layer and/or silver chloride layer.
Compared with prior art, the present invention has the following advantages: the present invention passes through adherent base bottom secure adhesion in skin, and by laying reinforcement adhesion, can guarantee electrode and tested body surface secure adhesion, avoid electrode to move, unclamp or come off, effectively avoided because the error of the surface potential signal that the contact resistance that attachment of electrodes causes produces from measured body.
In addition, conductive adhesive layer of the present invention is designed to the cylinder bodily form, and its diameter is more than or equal to 16mm, wherein acrylic acid content is 12%-18% simultaneously, thereby can when carrying out bio-electrical impedance measuring, obtain consistent electrical characteristics, thereby guarantee the anti-concordance of each contact resistance of measuring, to obtain the higher and repeatability of accuracy measured value preferably.
In addition, clasp of the present invention adopts eccentric design, interference when further having avoided moving to bio-electrical impedance measuring owing to measured body, guarantee the accuracy of measured value, and conductive layer of the present invention is preferably carbon film layer and/or silver chloride layer, can guarantee that electrode obtains the reflection current potential of measured body more accurately.
Description of drawings
Fig. 1 is the front view of electrode of the present invention;
Fig. 2 is the rearview of electrode of the present invention;
Fig. 3 is the side view of electrode of the present invention.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Need to prove, bio-electrical impedance imaging belongs to functional imaging, have this physical principle of different electrical impedance according to different tissues in the organism, by injecting little safe current to organism, the current potential of measuring body surface is rebuild the electrical impedance distribution image of inside of human body.Bio-electrical impedance imaging is by being disposed at the electrode battle array of organism body surface, extracts the tissue relevant with organism physiology, pathological state or the electrical characteristics information of organ, not only reflected anatomical structure, gives functional image result.Thereby in the present invention, bio-electrical impedance measuring is to be used for detecting the injection current of whole measured body or its part and a kind of like this measurement of the relativeness between the test voltage; Bipolar bio-electrical impedance measuring is to represent by same electrode by the bio-electrical impedance measuring of finishing by electric current and test voltage.
As Fig. 1, Fig. 2 and shown in Figure 3, a kind of bio-electrical impedance measuring electrode of the present invention comprises adhesive substrate layer 101, conductive adhesive layer 102, clasp 103 and laying 104; Described conductive adhesive layer 102, adherent base bottom 101 and laying 104 are connected successively.Preferably, the area of described conductive adhesive layer 102, adherent base bottom 101 and laying 104 increases successively.Need to prove that dotted line is the part of the adherent base bottom 101 that covered by laying 104 with interior part among Fig. 2.
When using electrode to carry out bio-electrical impedance measuring, electrode often takes place from the situation that measured body moves, unclamps or comes off, trace it to its cause, the one, because the adhesive strength of electrode meeting reduction gradually because of the perspiration that absorbs skin, the 2nd, because due to the motion of measured body in measuring process.In this case, clinical manifestation is generally when using electrode to carry out bio-electrical impedance measuring, and measured value constantly descends, and the error rate of twice measured value surpasses 30%.For example, when using electrode to measure under the frequency of 40khz, the AC impedance value of described electrode pair is 90 ohm, per two counter electrode between AC impedance value difference value be 18 ohm.
As can be seen, the secure adhesion power of electrode pair skin of the present invention is strengthened in the outer ring adhering to obtaining in inner ring secure adhesion and laying 104 by adherent base bottom 101, and the non-woven fabrics material of laying can be discharged the moisture of skin, thereby avoid electrode to move, unclamp or come off effectively from measured body, thereby also effectively avoided because the error of the surface potential signal that the contact resistance that attachment of electrodes causes produces, to guarantee the accuracy and the repeatability of measured value when the bio-electrical impedance measuring.
The inner surface of adherent base bottom 101 connects conductive adhesive layer 102, and described conductive adhesive layer is as the electric interface between electrode and the skin, and its outer surface directly and contact skin is used to obtain the reflection electric potential signal of measured body.In order to guarantee the electric conductivity concordance of various piece on the conductive adhesive layer, described conductive adhesive layer 102 is designed to this shape with stable electric conductivity of the cylinder bodily form, thereby guarantees that the reflection current potential that gets access on the measured body body surface contact surface by described conductive adhesive layer is accurate and stable.
The present invention tests the electrode of conductive adhesive layer with different-diameter, extracts meritorious, resistive impedance component and idle, capacitive impedance component in all cases from this bio-electrical impedance measuring.When the diameter of conductive adhesive layer during greater than about 16mm, two impedance components are linear, but the linearity of this linearity, particularly capacitive component is weakened when being lower than above-mentioned diameter.This result shows that when diameter was lower than about 16mm, the restriction that is brought by electrode began to work.Therefore, the diameter of conductive adhesive layer of the present invention is preferably more than or equals 16mm, one preferably the result be that its diameter is 18mm.In this case, the present invention can obtain the higher bio-electrical impedance measuring value of accuracy.
Under the situation of conductive adhesive layer with above-mentioned big relatively diameter, in order to guarantee that described conductive adhesive layer has good electrical conductivity, reduce the impedance of electrode and skin, so that derive bioelectrical signals from the measured body body surface, draw by clinical practice, acrylic acid content is functional under the situation of 12%-18% in the conductive adhesive layer 102, and effect is preferable when being used for somatometry; In acrylic acid content is that 15% o'clock performance is best, best results when being used for somatometry.
Need to prove, when carrying out bipolar bio-electrical impedance measuring, area, shape and chemical constituent for the same conductive adhesive layer that a plurality of electrode had should be consistent as far as possible, thereby can guarantee the anti-concordance of in use each contact resistance of measuring, the problem of the repeatable difference of measured value in the time of can further effectively avoiding bio-electrical impedance measuring.
In clinical practice, for the reflection current potential that described conductive adhesive layer is obtained is transferred to the bio-electrical impedance measuring instrument, electrode need be linked to each other with the lead of gauge by clasp fetches realization, apparent, the connection of described clasp is electrically connected, and is used for the conduct electricity characteristic.In this case, clasp of the present invention 103 is made by conducting metal, be electrically connected with described conductive adhesive layer 102 by conductive layer 105, in order further to avoid since when measured body motion or pressurized to the interference of bio-electrical impedance measuring, clasp 103 of the present invention adopts eccentric design, center design formula electrode compared to existing technology, eccentric design is adopted and the isolating mode in sensitizing range, can effectively improve the accuracy of measured value.
For making electrode of the present invention have better electric conductivity, described conductive layer 105 is preferably carbon film layer and/or silver chloride layer, this conductive layer is connected to the inner surface of conductive adhesive layer 102, and it is highly less than the height of conductive adhesive layer, and the skin with measured body does not come in contact.
When electrode of the present invention is applied to bio-electrical impedance measuring, at first can be to the detection position of measured body supplemantary electrode; Inject safe current according to detecting needs by described electrode measured body then, and measure the current-voltage relativeness and handle; Again by described electrode obtain AC impedance value and/or per two counter electrode between AC impedance value difference value.
A typical results using electrode of the present invention to obtain is, under the frequency of 40khz, the AC impedance value of described electrode pair is not more than 30 ohm, per two counter electrode between AC impedance value difference value for being not more than 3 ohm, can draw, its measured value has higher accuracy with repeatable.
More than to a kind of bio-electrical impedance measuring electrode provided by the present invention and measuring method, be described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1, a kind of bio-electrical impedance measuring electrode is characterized in that, described electrode comprises adhesive substrate layer, conductive adhesive layer, clasp and laying; Described conductive adhesive layer, adherent base bottom are connected successively with laying, and described clasp is eccentric design, and described conductive adhesive layer is the cylinder bodily form, and described clasp is electrically connected with described conductive adhesive layer.
2, electrode as claimed in claim 1 is characterized in that, the diameter of described conductive adhesive layer is more than or equal to 16mm.
3, electrode as claimed in claim 2 is characterized in that, the diameter of described conductive adhesive layer is 18mm.
4, electrode as claimed in claim 1 is characterized in that, the area of described conductive adhesive layer, adherent base bottom and laying increases successively, and the peripheral part that described laying exceeds described adherent base bottom has the tacky adhesion face that contacts with skin viscosity.
As claim 1,2 or 3 described electrodes, it is characterized in that 5, described laying is a non-woven fabrics; Described clasp is electrically connected with described conductive adhesive layer by conductive layer, and described conductive layer is carbon film layer and/or silver chloride layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620159891 CN200994775Y (en) | 2006-12-05 | 2006-12-05 | Biological impedance measuring electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620159891 CN200994775Y (en) | 2006-12-05 | 2006-12-05 | Biological impedance measuring electrode |
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| CN200994775Y true CN200994775Y (en) | 2007-12-26 |
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| CN 200620159891 Expired - Fee Related CN200994775Y (en) | 2006-12-05 | 2006-12-05 | Biological impedance measuring electrode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090889A (en) * | 2011-01-21 | 2011-06-15 | 中山大学 | Concentric circle type metal body surface electrode for bioelectrical impedance detection technology and manufacturing method thereof |
| CN102544052A (en) * | 2012-03-08 | 2012-07-04 | 中国科学院深圳先进技术研究院 | Flexible intracranial cortex microelectrode chip, and preparation method and packaging method and packaging structure thereof |
| WO2021093150A1 (en) * | 2019-11-15 | 2021-05-20 | 青岛光电医疗科技有限公司 | Eccentric electrocardiogram electrode |
-
2006
- 2006-12-05 CN CN 200620159891 patent/CN200994775Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090889A (en) * | 2011-01-21 | 2011-06-15 | 中山大学 | Concentric circle type metal body surface electrode for bioelectrical impedance detection technology and manufacturing method thereof |
| CN102090889B (en) * | 2011-01-21 | 2013-01-09 | 中山大学 | Concentric circle type metal body surface electrode for bioelectrical impedance detection technology and manufacturing method thereof |
| CN102544052A (en) * | 2012-03-08 | 2012-07-04 | 中国科学院深圳先进技术研究院 | Flexible intracranial cortex microelectrode chip, and preparation method and packaging method and packaging structure thereof |
| WO2021093150A1 (en) * | 2019-11-15 | 2021-05-20 | 青岛光电医疗科技有限公司 | Eccentric electrocardiogram electrode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071226 Termination date: 20101205 |