CN107684420B - Liquid metal electrocardioelectrode piece - Google Patents
Liquid metal electrocardioelectrode piece Download PDFInfo
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- CN107684420B CN107684420B CN201610631371.9A CN201610631371A CN107684420B CN 107684420 B CN107684420 B CN 107684420B CN 201610631371 A CN201610631371 A CN 201610631371A CN 107684420 B CN107684420 B CN 107684420B
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- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 67
- 239000010410 layer Substances 0.000 claims abstract description 28
- 239000012790 adhesive layer Substances 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 239000013013 elastic material Substances 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 7
- 229910000846 In alloy Inorganic materials 0.000 claims description 7
- 229910052733 gallium Inorganic materials 0.000 claims description 7
- 229910052738 indium Inorganic materials 0.000 claims description 7
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 description 15
- 229910045601 alloy Inorganic materials 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 229910001128 Sn alloy Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- -1 polydimethylsiloxane Polymers 0.000 description 4
- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- PSMFTUMUGZHOOU-UHFFFAOYSA-N [In].[Sn].[Bi] Chemical compound [In].[Sn].[Bi] PSMFTUMUGZHOOU-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 210000004712 air sac Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- A61B5/251—Means for maintaining electrode contact with the body
- A61B5/257—Means for maintaining electrode contact with the body using adhesive means, e.g. adhesive pads or tapes
- A61B5/259—Means for maintaining electrode contact with the body using adhesive means, e.g. adhesive pads or tapes using conductive adhesive means, e.g. gels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Dispersion Chemistry (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Electrotherapy Devices (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention provides a liquid metal electrocardio electrode plate which is of an integrated structure, wherein the electrode plate is circular and is divided into an upper layer and a lower layer along a central shaft, the upper layer is provided with a storage cavity (2), the lower layer is provided with a contact cavity (4), the storage cavity has variable volume and is internally filled with liquid metal, the contact cavity is a conical hollow cavity made of deformable elastic material, and when the electrode plate is used, the liquid metal in the storage cavity enters the contact cavity to enable the liquid metal to be directly contacted with skin; an adhesive layer (5) is arranged in the peripheral annular area of the contact cavity; and a lead (3) positioned in the center of the electrode plate penetrates through the storage cavity and the contact cavity, when the electrode plate is used, the lower end of the lead is soaked in the liquid metal, and the other end of the lead extends outwards from the center of the storage cavity and is used for being connected with a detection instrument. The liquid metal electrode plate provided by the invention has good flexibility, can be completely attached to the skin of a user, and effectively improves the contact area of the electrode; and the movable cavity is designed, so that the electrode plate can be repeatedly used.
Description
Technical Field
The invention relates to the field of medical materials, in particular to a liquid metal electrocardioelectrode plate.
Background
Various bioelectric signals exist in a living body, the most common of which is electrocardiosignals, and the detection of the electrocardiosignals has important significance for diagnosing cardiovascular diseases. The current in the living body is ion-conducting, while the current in the electrodes and the detecting instrument is electron-conducting, so that the ion-conducting in the living body must be converted into the corresponding electron-conducting by the electrodes. The skin of a human body is equivalent to a semipermeable membrane of ions and has a certain potential difference, and the metal and the skin realize the conversion from ion conduction to electron conduction through redox reaction in an electrolyte environment. The traditional electrocardioelectrode slice mainly comprises a metal sheet and conductive paste, wherein the conductive paste has the function of ensuring the metal sheet to be in good contact with skin and also has the function of electrolyte. At present, most electrocardio-electrodes adopt solid metal sheet electrodes, and the electrodes cannot be well matched with skin with uneven surface shape, so that the detection effect of the electrodes is influenced. In addition, although the disposable electrocardio-electrode plate has small volume and convenient use, the disposable electrocardio-electrode plate consumes large electrode materials and wastes resources.
The liquid metal is an alloy with a low melting point, such as gallium-based alloy, indium-based alloy, bismuth-based alloy, and the like. The alloy material has good conductivity and lower melting point, thus having wide application prospect in the aspects of flexible electronics, deformable machine research and the like.
Disclosure of Invention
The invention aims to provide a liquid metal electrocardioelectrode plate.
In order to realize the purpose of the invention, the liquid metal is applied to the preparation of the electrocardio-electrode slice, and the liquid metal is contacted with the skin with irregular shape by utilizing the fluidity and the conductivity of the liquid metal, so that the effective contact area is increased, and the detection effect of the electrocardio-electrode is improved. In addition, the invention combines the liquid metal with the elastic film with a specific shape, and a user can independently control the release and the recovery of the liquid metal, so that the electrode plate can be repeatedly used.
The invention provides a liquid metal electrocardioelectrode plate, which is an integrated electrocardioelectrode plate, wherein the electrode plate is integrally circular and is divided into an upper layer and a lower layer along a circular central shaft, the upper layer is provided with a storage cavity 2, the lower layer is provided with a contact cavity 4, the storage cavity 2 is a cavity with variable volume, liquid metal is filled in the storage cavity, the liquid metal is released and recovered by changing the volume of the cavity, the contact cavity 4 is a conical hollow cavity made of deformable elastic material, and when the electrode plate is used, the liquid metal in the upper storage cavity 2 enters the lower contact cavity 4, so that the liquid metal is directly contacted with skin; an adhesive layer 5 is arranged in the peripheral annular area of the contact cavity 4 and used for fixing the electrode plate on the surface of the skin; the wire 3 that is located electrode slice center runs through in upper storage chamber 2 and lower floor contact chamber 4, and when the electrode slice used, the lower extreme of guaranteeing wire 3 soaks in the liquid metal that gets into contact chamber 4 from storage chamber 2, and the other end of wire 3 outwards extends from storage chamber 2 center for link to each other with detecting instrument.
The storage cavity 2 is cylindrical or spherical, the volume of the cavity is changed through a piston or an elastic air bag, and the lead 3 penetrates through the center of the piston or the elastic air bag. In addition, variable volume chambers designed in other ways are within the scope of the invention.
The liquid metal is a metal or alloy material which keeps liquid state at normal temperature, and comprises gallium-based alloy, indium-based alloy, bismuth-based alloy and the like; or, the liquid metal is an alloy material with a modified metal surface, and the modification comprises oxidation treatment and the like.
Preferably, the liquid metal is gallium-indium alloy, gallium-indium-tin alloy, bismuth-indium-tin alloy or the like, and is in a liquid state at normal temperature.
More preferably, the liquid metal is formed from gallium and indium in a ratio of 75.5: 24.5, and the melting point of the gallium-indium alloy is 10.35 ℃.
The electrode plate is made of insulating and elastic materials, including rubber, silica gel or plastics, such as polydimethylsiloxane, polyethylene and the like, or other types of high polymer materials are used.
And a removable PVC film is adhered to the surface of the adhesive layer 5. The adhesive layer is made of an adhesive material of the traditional electrocardio-electrode, and when the electrode plate is not used, the PVC film is adhered on the surface of the adhesive layer to prevent the viscosity of the adhesive material from being reduced.
The invention also provides application of the liquid metal in preparing the electrocardio-electrode slice.
The liquid metal is a metal or alloy material which keeps liquid state at normal temperature, and comprises gallium-based alloy, indium-based alloy, bismuth-based alloy and the like; or, the liquid metal is an alloy material with a modified metal surface, and the modification comprises oxidation treatment and the like.
Preferably, the liquid metal is gallium-indium alloy, gallium-indium-tin alloy, bismuth-indium-tin alloy or the like, and is in a liquid state at normal temperature.
More preferably, the liquid metal is formed from gallium and indium in a ratio of 75.5: 24.5, and the melting point of the gallium-indium alloy is 10.35 ℃.
The invention provides a design scheme based on a liquid metal electrocardio-electrode plate for the first time, which utilizes the conductivity and the liquidity of liquid metal to directly contact with skin as an electrode. The liquid metal electrode plate has good flexibility, can be completely attached to the skin of a user, effectively improves the contact area of the electrode, and can be repeatedly used due to the design of the movable cavity.
Drawings
Fig. 1 is a schematic view of the overall structure of a piston-type liquid metal electrocardioelectrode plate in embodiment 1 of the present invention; wherein A is an overall appearance diagram of the electrode slice; and B is a cross-sectional view of the electrode sheet.
FIG. 2 shows the piston movement and the liquid metal position of the central electrode sheet in accordance with embodiment 1 of the present invention; wherein A is in an unused state; b is the use state.
Fig. 3 is a schematic view of the overall structure of a gas-bag type liquid metal electrocardioelectrode plate in embodiment 2 of the present invention; wherein A is an overall appearance diagram of the electrode slice; and B is a cross-sectional view of the electrode sheet.
FIG. 4 shows the deformation of the central electrode sheet and the position change of the liquid metal in the center electrode sheet according to example 2 of the present invention; wherein A is in an unused state; b is the use state.
In the figure, 1: liquid metal electrocardioelectrode plates; 2: a storage chamber; 3: a wire (connecting wire); 4: a contact cavity; 5: an adhesive layer; 6: a piston; 7: an elastic film; 8: an air bag; 9: a liquid metal.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are commercially available products.
The liquid metal used in the following examples was prepared from gallium and indium at 75.5: 24.5, and the melting point of the gallium-indium alloy is 10.35 ℃. Experiments show that the gallium-indium alloy can not be dissolved in water, is not easy to be absorbed by skin and is safe to use. The electrode sheet is made of insulating and elastic material, including rubber, silica gel or plastic, such as polydimethylsiloxane, polyethylene, etc., or other types of high molecular polymer materials are used.
In the description of the present invention, unless otherwise specified, the terms "upper", "lower", and the like, indicate orientations or state relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
EXAMPLE 1 piston type liquid metal electrocardioelectrode slice
The overall structure schematic diagram of the piston type liquid metal electrocardioelectrode plate provided by the embodiment is shown in figure 1. The liquid metal electrocardioelectrode slice 1 can be divided into an upper layer and a lower layer: the upper strata is the cylindrical upper storage chamber 2 that is located central authorities, and the center in upper storage chamber is the connecting wire 3 that runs through whole electrode slice, and lower floor central authorities are conical lower floor contact chamber 4, fills liquid metal 9 and skin direct contact when using, and lower floor periphery ring shape region is viscose layer 5, and the surface has pasted the PVC film when not using, takes off the PVC film during use and pastes on the skin surface.
The piston motion situation and the liquid metal position change situation of the piston type liquid metal electrocardioelectrode plate provided by the embodiment are shown in figure 2. The upper storage cavity 2 is a movable cavity with variable volume, and the change of the cavity volume is realized by adopting a movable piston mode in the embodiment: a circular rubber piston 6 is arranged in the upper part of the upper storage chamber 2. After the electrode plate is pasted on the surface of the skin, the piston 6 is pushed inwards, so that the liquid metal 9 is poured into the lower contact cavity 4; after the electrode is used, the piston is pulled outwards, so that the liquid metal 9 is sucked back into the upper storage cavity 2. A deformable elastic film 7 is distributed on the upper surface of the lower contact cavity 4, and when the piston 6 is pushed inwards, the elastic film 7 protrudes upwards to balance air pressure, so that liquid metal 9 can smoothly enter the lower contact cavity 4.
Example 2 air sac type liquid metal electrocardioelectrode slice
The overall structural schematic diagram of the air bag type liquid metal electrocardioelectrode plate provided by the embodiment is shown in fig. 3. The liquid metal electrocardioelectrode slice 1 can be divided into an upper layer and a lower layer: the upper layer is a spherical elastic air bag 8 with openings at the upper and lower parts, and liquid metal 9 is filled in the upper layer; the air bag 8 is downwards connected with the lower layer contact cavity 4, and the lower layer contact cavity 4 is a conical cavity; a connecting lead 3 is inserted from the upper end opening of the air bag 8 and enters the lower layer contact cavity 4 through the lower end opening of the air bag 8; the lower layer periphery ring-shaped area is an adhesive layer 5.
The deformation condition of the air bag type liquid metal electrocardioelectrode plate and the position change condition of the liquid metal are shown in figure 4. When the electrode plate is used, the electrode plate is pasted on the surface of the skin and then the air bag 8 is pressed, so that the liquid metal 9 in the electrode plate enters the lower layer contact cavity 4 and is in contact with the skin; after the use is finished, the air bag 8 is loosened, and the liquid metal 9 is sucked back into the upper storage cavity 2 under the action of the self elastic force of the air bag 8. A deformable elastic film 7 is distributed on the upper surface of the lower layer contact cavity 4, and when the air bag 8 is extruded, the elastic film 7 protrudes upwards to balance air pressure, so that liquid metal 9 smoothly enters the lower layer contact cavity 4.
Through detection, the liquid metal electrocardioelectrode plates prepared in the embodiments 1 and 2 have stable use effect, the goodness of fit with the test result of the commercial electrocardioelectrode is within 2%, and the change amplitude of long-term use is controlled within 5%.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. The liquid metal electrocardioelectrode plate is characterized by being an integrated electrocardioelectrode plate, the electrode plate is integrally circular, and is divided into an upper layer and a lower layer along a circular central shaft, the upper layer is provided with a storage cavity (2), the lower layer is provided with a contact cavity (4), the storage cavity (2) is a cavity with variable volume, liquid metal is filled in the storage cavity, the liquid metal is released and recovered by changing the volume of the cavity, the contact cavity (4) is a conical hollow cavity made of deformable elastic material, and when the electrode plate is used, the liquid metal in the storage cavity (2) on the upper layer enters the contact cavity (4) on the lower layer, so that the liquid metal is in direct contact with skin; an adhesive layer (5) is arranged in the peripheral annular area of the contact cavity (4) and used for fixing the electrode plate on the surface of the skin; the lead (3) positioned in the center of the electrode plate penetrates through the upper storage cavity (2) and the lower contact cavity (4), when the electrode plate is used, the lower end of the lead (3) is ensured to be soaked in liquid metal entering the contact cavity (4) from the storage cavity (2), and the other end of the lead (3) extends outwards from the center of the storage cavity (2) and is used for being connected with a detection instrument;
the liquid metal is prepared from gallium and indium according to the weight ratio of 75.5: 24.5, wherein the melting point of the gallium-indium alloy is 10.35 ℃;
the storage cavity (2) is cylindrical or spherical, the volume of the cavity is changed through the piston, and the lead (3) penetrates through the center of the piston.
2. The electrocardioelectrode sheet according to claim 1, wherein the electrode sheet is made of an insulating and elastic material, including rubber, silica gel or plastic.
3. The electrocardioelectrode sheet according to claim 1 or 2, wherein a removable PVC film is adhered on the surface of the adhesive layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610631371.9A CN107684420B (en) | 2016-08-04 | 2016-08-04 | Liquid metal electrocardioelectrode piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610631371.9A CN107684420B (en) | 2016-08-04 | 2016-08-04 | Liquid metal electrocardioelectrode piece |
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| Publication Number | Publication Date |
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| CN107684420A CN107684420A (en) | 2018-02-13 |
| CN107684420B true CN107684420B (en) | 2020-12-04 |
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| CN201610631371.9A Active CN107684420B (en) | 2016-08-04 | 2016-08-04 | Liquid metal electrocardioelectrode piece |
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| CN108955226B (en) * | 2018-08-17 | 2020-07-17 | 瑞安市如果建材有限公司 | Automatic drying device for ceramic tiles |
| CN109243961B (en) * | 2018-09-30 | 2024-05-14 | 镇江华智睿安物联科技有限公司 | Microfluidic electrode ion migration tube and preparation method thereof |
| CN111465190A (en) * | 2019-01-18 | 2020-07-28 | 北京梦之墨科技有限公司 | A wearable electronic circuit and its DIY production method, DIY kit |
| CN110108771A (en) * | 2019-05-13 | 2019-08-09 | 北京镓族科技有限公司 | The method and purposes of liquid gallium or liquid gallium-base alloy as electrode material |
| CN110367972B (en) * | 2019-06-28 | 2022-03-01 | 重庆市职业病防治院（重庆市第六人民医院） | Electrocardio monitoring electrode plate |
| CN111254370A (en) * | 2020-01-20 | 2020-06-09 | 深圳市德诚旺科技有限公司 | Self-fluxing alloy material and preparation method thereof |
| CN111436932B (en) * | 2020-04-03 | 2024-09-17 | 南昌大学 | Liquid metal brain electrode |
| CN112289618A (en) * | 2020-10-14 | 2021-01-29 | 西安医学院 | Phase change switch based on gallium indium tin liquid metal |
| CN118078297B (en) * | 2023-12-15 | 2024-08-20 | 中国人民解放军总医院第四医学中心 | Surface enhanced electrode slice based on liquid alloy and manufacturing device thereof |
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| CN101489623A (en) * | 2006-07-24 | 2009-07-22 | Med-El电气医疗器械有限公司 | Implantable neuro-stimulation electrode with drug elution material |
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| CN107684420A (en) | 2018-02-13 |
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