CN108784696A - A kind of suction electrode control method for human impedance imaging - Google Patents
A kind of suction electrode control method for human impedance imaging Download PDFInfo
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- CN108784696A CN108784696A CN201810528480.7A CN201810528480A CN108784696A CN 108784696 A CN108784696 A CN 108784696A CN 201810528480 A CN201810528480 A CN 201810528480A CN 108784696 A CN108784696 A CN 108784696A
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- electrode
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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
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0536—Impedance imaging, e.g. by tomography
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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
- A61B5/683—Means for maintaining contact with the body
- A61B5/6834—Means for maintaining contact with the body using vacuum
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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
- A61B5/6844—Monitoring or controlling distance between sensor and tissue
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- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The present invention relates to a kind of suction electrode control methods for human impedance imaging, the suction electrode controlled includes the electrode group being made of multiple electrodes body and electrode signal controller, electrode body includes that cup body, electrode are admitted to electrode signal controller to, baroceptor and electrode interface, the measuring signal of electrode pair by analog-to-digital conversion circuit；Electrode signal controller, excitation and measuring state and coordination electrode for coordination electrode pair measure contact impedance；It is provided with the aspirating hole being connected with micro air pump in bottom of a cup or close to the position of bottom of a cup, electrode control method is：The safe range and dynamic equilibrium value and contact impedance threshold value of default nominal pressure value, for each electrode body, if air pressure is more than dynamic equilibrium value, micro air pump gas bleeding；If air pressure is less than dynamic equilibrium value, micro air pump is pumped into gas；If air pressure, at dynamic equilibrium value, the air pressure of electrode body is in equilibrium state.
Description
Technical field
The present invention relates to a kind of suction electrodes for human impedance imaging.
Background technology
Review of Electrical Impedance Tomography is a kind of medical image detection technique, can be used for the tissues knot such as torso model, abdominal cavity
The inspection of structure, it usually needs the electrode of 16 and the above equidistantly distributed.By applying current excitation letter to each electrode successively
Number or voltage excitation signals, and acquire the signal detected on other electrodes simultaneously, using algorithm for reconstructing, obtain measuring section
Electrical characteristics are distributed.
Tissue has good electric conductivity, and at different frequencies, variation range is from tens ohm to several for impedance
Hundred ohm；But the contact impedance between electrode and skin can have more significantly with the elastic of the difference and electrode of human body installation
Variation, variation range is from hundreds of ohm to tens of thousands of ohms, and the contact impedance of different location is also different, this is to electrical impedance imaging
There is obvious influence.Therefore, measure and adjust the contact that the contact impedance between electrode and skin is conducive to real-time detecting electrode
Situation improves the quality and stability of electrical impedance imaging.
At present in biomedical sector, electrode is usually laminated structure, and skin surface is pasted on by way of stickup simultaneously
Ensure that electrode and skin contact are good.However, this way of contact pressure is smaller, it is easy to fall off, and contact impedance is unstable.Thus
Invent it is a kind of can measure and adjust contact impedance and stablize the electrode system for human impedance imaging not easily to fall off,
There is important application value in actually detected.
Invention content
The object of the present invention is to provide a kind of measurement and adjusts contact impedance and stablize and not easily to fall off be used for human body resistance
The electrode of anti-imaging, and its control method is provided, technical solution is as follows.
A kind of suction electrode control method for human impedance imaging, the suction electrode controlled include：Electricity
Source, the electrode group being made of multiple electrodes body and electrode signal controller, each electrode body are connected with electrode signal controller,
It is characterized in that, electrode body includes that cup body, electrode wrap, baroceptor and electrode interface, the cup body successively from inside to outside
Shell, inner insulating layer, ground plane and external insulation layer are included, each electrode of electrode pair is fixed on the shell and inner insulating layer of cup body
Between, it is stretched from cup edge to bottom of a cup；Electrode pair and ground plane are formed by electrode interface and electrode signal controller and power supply
Electrical connection, the measuring signal of electrode pair are admitted to electrode signal controller by analog-to-digital conversion circuit；Electrode signal control
Device processed, excitation and measuring state and coordination electrode for coordination electrode pair measure contact impedance；The cup body is rigid material
Matter is provided with aspirating hole in bottom of a cup or close to the position of bottom of a cup, and the aspirating hole is connected with micro air pump, and micro air pump is opened
It opens and closes and controlled by electrode signal controller, by forming negative pressure state in the cup body of electrode body so that electrode body
Rim of a cup is adsorbed on testee surface；Baroceptor, the air pressure signal for air pressure in detection cup body, acquisition are admitted to electricity
Pole signal controller, electrode control method are：The safe range and dynamic equilibrium value and contact impedance of default nominal pressure value
Threshold value, for each electrode body, if air pressure is more than dynamic equilibrium value, micro air pump gas bleeding；If it is flat that air pressure is less than dynamic
Weighing apparatus value, then micro air pump be pumped into gas；If air pressure, at dynamic equilibrium value, the air pressure of electrode body is in equilibrium state；If volume
Determine the safe range of atmospheric pressure value and electrode is more than threshold value, micro air pump gas bleeding to the contact impedance value measured, and returns to report
Alert signal, alarm module feed back the electrode number of corresponding poor contact.
The invention adopts the above technical scheme, which has the following advantages：
1) fix electrode by the way of closing tiny structure cavity, improve the stability of electrode position, ensure electrode with
The reliability of skin contact；
2) air pressure in each electrode cavity can be automatically adjusted, the pressure of each electrode and skin is made to be consistent and in peace
Full tiny structure range optimizes the quality of data and image quality to ensure that the contact impedance of each electrode and skin is consistent；
3) electrical impedance can be used to monitor the contact condition of each electrode and skin respectively with baroceptor, had accurately
Drop alarm function improves the stability of system using closed loop detection.
4) it can improve adaptability of the electrode system to different building shape with flexible modulation number of electrodes, enhance electrode
The flexibility that system uses.
Description of the drawings
Fig. 1 is electrode group structure schematic diagram.
Fig. 2 is the circuit structure diagram of electrode system.
Fig. 3 is scheme of installation of the electrode in torso model.
Fig. 4 is the structural schematic diagram of electrode body.
Fig. 5 is electrode body vertical view.
Fig. 6 is electrode body front view.
Electrical connection diagrams of the Fig. 7 between electrode pair and electrode signal controller.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, the human impedance imaging absorption of the applicable controllable contact impedance of control method of the invention
Formula electrode system critical piece includes：
The electrode group of several electrode bodies composition, each electrode body are respectively arranged with：
Electrode interface is used for connection electrode body and data line；
Micro air pump, for being discharged or being pumped into gas according to instruction when system works；
Baroceptor, for the air pressure in real-time detecting electrode body；
The electrode pair being made of two symmetrical electrodes, for the measurement of contact impedance, excitation and detection electric signal；
Data line includes a plurality of conducting wire, equidistantly draws the conducting wire for connection electrode body respectively, connects each electrode
Body and electrode signal controller, are used for transmission signal；
Connector is used for connection electrode signal controller；
Electrode signal controller, is a part for entire electric impedance imaging system, and electrode signal controller is internally provided with：
Air pressure control module, for equalizing the air pressure in coordination electrode body；
Electrode data processing module, the excitation for coordination electrode and measuring state, and contact of the measuring electrode with skin
Impedance；
Alarm module connects for sending out alarm when detecting that electrode is bad with skin contact, and to medical worker's feedback
Touch undesirable electrode number；
Movable nylon tape is set on data line close near the electrode body of connector, extra not connected for fixing
The data line of electrode body.
Operation principle is explained in detail with reference to Fig. 2.
Each electrode body is respectively connected to electrode signal controller by data line.
When mounted, when the electrode of n-th of electrode body is to detecting that electrode body has been fitted in skin surface, air pump pumps out electricity
Polar body intracavity gas forms negative pressure state, is gradually adsorbed to skin surface under the action of air pressure reduces in electrode body, reduce
Contact impedance simultaneously keeps electrode body secured with skin attachement；When the air pressure that baroceptor detects reaches the installation electrode of setting
When atmospheric pressure value, installation is complete for the electrode body, micro air pump break-off, and on the skin, electrode is believed for electrode body absorption completely at this time
Number controller is by identifying that the number of electrodes of connection determines working electrode quantity.After the absorption of all electrode bodies installs, it is
System is started to work.
Before system work, the safe range and dynamic equilibrium value of default nominal pressure value are needed, it is more than people to prevent air pressure
Body skin can tolerance range, cause skin histology impaired.During the work time, air pressure control module is responsible for balanced each electrode cavity
The air pressure of body.Baroceptor monitors the gas pressure in electrode body in real time, and barometric information is fed back to by data line
The air pressure control module of electrode signal controller, there are four types of the state of a controls of air pressure：If air pressure is more than dynamic equilibrium value, miniature
Air pump gas bleeding；If air pressure is less than dynamic equilibrium value, micro air pump is pumped into gas；If air pressure at dynamic equilibrium value,
The air pressure of electrode body is in equilibrium state；It the contact impedance value measured is more than sets if air pressure is more than nominal pressure range and electrode
Threshold value, micro air pump gas bleeding are set, and returns to alarm signal, alarm module feeds back corresponding poor contact to medical worker
Electrode number.Using air pressure detection function, electrode system can realize that stability is adjusted.
During the work time, the impedance measurement of electrode and excitation measurement process alternately, by electrode data processing module
The state for controlling each electrode pair, according to the excitation measurement pattern of program setting to each electrode to encouraging in order, measuring telecommunications
Number, carry out impedance measurement after each excitation measurement period.
As shown in figure 3, when connector be inserted into electrode signal controller and be powered after, according to data line setting distance by
One places electrode body on the skin, then electrode body automatic absorbing fixes remaining number in skin surface with activity nylon tape
According to transmission line, its start-up operation is controlled by the switch of system.
Electrode body describes：
Referring to fig. 4 to fig. 6, electrode body is mainly by aspirating hole 1, signal processing module 2, insulating layer 3, ground plane 4, Yi Dui electricity
Wafer thin 5 and shell 6 are constituted.Shell 6 is using hard material (such as acrylic, plastics etc.), correspondingly, layer structure both can be with
Using hard material, soft material can also be used.
In Fig. 4,1 is aspirating hole, is set to the tip platform of electrode cup body.When electrode is installed, then by control system
Control air pump carries out decompression adsorption operations.2 be signal processing module, is positioned over the tip platform of electrode body, including electrode interface,
Baroceptor and analog-to-digital conversion circuit.
As shown in Figure 5 and Figure 6, cup body is made up of multiple layers, and external insulation layer 32 is followed successively by from outside to inside in electrode position, ground connection
Layer 4, inner insulating layer 31, electrode foil 5, shell 6.Wherein, inner insulating layer 31 coats shell and electrode foil, for ground connection to be isolated
Layer and measuring electrode sheet prevent ground plane and measuring electrode sheet short circuit；The cladding of external insulation layer 32 is in addition to electric at micro air pump, rim of a cup
Entire cup body outside pole and electrode interface, prevents electrode body to be connected with external circuitry, is had an impact to cup body circuit.Ground plane 4
Be coated on outside inner insulating layer, prevent the electromagnetic interference of outer bound pair electrode slice, at the same prevent in the electrode slice course of work to surrounding its
The electromagnetic interference of his electrode body.5 be a pair of electrodes thin slice, is attached to the symmetric position and wrapping portion rim of a cup of rim of a cup, referring to Fig. 4,
Electrode foil 5 extends to cup body tip platform edge, is then connect with signal processing module by conducting wire.
As shown in fig. 7, the port of connection electrode signal controller in need all summarize at electrode interface, and pass through company
Wiring is connect with electrode signal controller；Electrode signal controller provides power supply by electrode interface to entire electrode body, wherein
Including powering to baroceptor, ground plane connects power cathode；When electrode body is as excitation electrode, system passes through electrode interface
To electrode to sending pumping signal.Baroceptor will detect that air pressure signal is connect by electrode for monitoring air pressure in cup body
Oral instructions are back to electrode signal controller.If the atmospheric pressure value that baroceptor detects is less than safe range, electrode signal controller
Send out the too low alarm signal of air pressure；If the atmospheric pressure value that baroceptor detects is more than the voltage threshold of setting and contact impedance is big
In the impedance threshold of setting, electrode signal controller, which is sent out, falls alarm signal.Simulation numeral (AD) conversion circuit is used for will be electric
It is transmitted after being extremely converted to digital signal to the impedance value and voltage value that measure, or is not provided with A/D converter circuit, will directly measured
Voltage and resistance value are transmitted with analog signal form.
Claims (1)
1. a kind of suction electrode control method for human impedance imaging, the suction electrode controlled include：Power supply,
The electrode group and electrode signal controller be made of multiple electrodes body, each electrode body are connected with electrode signal controller, special
Sign is, electrode body includes that cup body, electrode include successively from inside to outside to, baroceptor and electrode interface, the cup body
Each electrode of shell, inner insulating layer, ground plane and external insulation layer, electrode pair is fixed between the shell of cup body and inner insulating layer,
It is stretched from cup edge to bottom of a cup；Electrode pair and ground plane are formed electrically by electrode interface and electrode signal controller and power supply
Connection, the measuring signal of electrode pair are admitted to electrode signal controller by analog-to-digital conversion circuit；Electrode signal controller,
Excitation for coordination electrode pair measures contact impedance with measuring state and coordination electrode；The cup body is rigid material,
Bottom of a cup is provided with aspirating hole close to the position of bottom of a cup, and the aspirating hole is connected with micro air pump, the unlatching of micro air pump with
Closing is controlled by electrode signal controller, by forming negative pressure state in the cup body of electrode body so that the rim of a cup of electrode body
It is adsorbed on testee surface；Baroceptor, for air pressure in detection cup body, the air pressure signal of acquisition is admitted to electrode letter
Number controller, electrode control method are：The safe range and dynamic equilibrium value and contact impedance threshold value of default nominal pressure value,
For each electrode body, if air pressure is more than dynamic equilibrium value, micro air pump gas bleeding；If air pressure is less than dynamic equilibrium value,
Then micro air pump is pumped into gas；If air pressure, at dynamic equilibrium value, the air pressure of electrode body is in equilibrium state；If nominal pressure
The safe range and electrode of value are more than threshold value, micro air pump gas bleeding to the contact impedance value measured, and return to alarm signal,
Alarm module feeds back the electrode number of corresponding poor contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810528480.7A CN108784696A (en) | 2018-05-29 | 2018-05-29 | A kind of suction electrode control method for human impedance imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810528480.7A CN108784696A (en) | 2018-05-29 | 2018-05-29 | A kind of suction electrode control method for human impedance imaging |
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| Publication Number | Publication Date |
|---|---|
| CN108784696A true CN108784696A (en) | 2018-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810528480.7A Pending CN108784696A (en) | 2018-05-29 | 2018-05-29 | A kind of suction electrode control method for human impedance imaging |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070142738A1 (en) * | 2005-12-16 | 2007-06-21 | Chin-Yeh Hung | Dynamic heart rate monitor |
| CN201987552U (en) * | 2011-03-03 | 2011-09-28 | 王惠新 | Adsorption electrode for electrocardiogram machine |
| CN102697499A (en) * | 2012-06-08 | 2012-10-03 | 思澜科技（成都）有限公司 | Electrode band for electrical impedance tomography and using method thereof |
| CN102894975A (en) * | 2012-10-28 | 2013-01-30 | 思澜科技（成都）有限公司 | Electrode shield used for mammography |
| CN103170064A (en) * | 2013-03-27 | 2013-06-26 | 深圳先进技术研究院 | Integral probe for diagnosis and treatment |
| CN203898303U (en) * | 2014-06-20 | 2014-10-29 | 杜建英 | Electrocardiogram chest lead ball suction electrode with falling alarm function |
| CN106361335A (en) * | 2016-11-04 | 2017-02-01 | 杭州永川科技有限公司 | Electrical impedance signal collecting device |
| CN106618569A (en) * | 2016-11-10 | 2017-05-10 | 中国人民解放军第四军医大学 | Measuring device and method for contact impedance between electrodes and skin |
-
2018
- 2018-05-29 CN CN201810528480.7A patent/CN108784696A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070142738A1 (en) * | 2005-12-16 | 2007-06-21 | Chin-Yeh Hung | Dynamic heart rate monitor |
| CN201987552U (en) * | 2011-03-03 | 2011-09-28 | 王惠新 | Adsorption electrode for electrocardiogram machine |
| CN102697499A (en) * | 2012-06-08 | 2012-10-03 | 思澜科技（成都）有限公司 | Electrode band for electrical impedance tomography and using method thereof |
| CN102894975A (en) * | 2012-10-28 | 2013-01-30 | 思澜科技（成都）有限公司 | Electrode shield used for mammography |
| CN103170064A (en) * | 2013-03-27 | 2013-06-26 | 深圳先进技术研究院 | Integral probe for diagnosis and treatment |
| CN203898303U (en) * | 2014-06-20 | 2014-10-29 | 杜建英 | Electrocardiogram chest lead ball suction electrode with falling alarm function |
| CN106361335A (en) * | 2016-11-04 | 2017-02-01 | 杭州永川科技有限公司 | Electrical impedance signal collecting device |
| CN106618569A (en) * | 2016-11-10 | 2017-05-10 | 中国人民解放军第四军医大学 | Measuring device and method for contact impedance between electrodes and skin |
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Application publication date: 20181113 |
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