WO2010081470A1 - Electrode system for non-invasively measuring bioelectric signals - Google Patents

Electrode system for non-invasively measuring bioelectric signals Download PDF

Info

Publication number
WO2010081470A1
WO2010081470A1 PCT/DE2010/000043 DE2010000043W WO2010081470A1 WO 2010081470 A1 WO2010081470 A1 WO 2010081470A1 DE 2010000043 W DE2010000043 W DE 2010000043W WO 2010081470 A1 WO2010081470 A1 WO 2010081470A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
characterized
arrangement according
formed
preceding
Prior art date
Application number
PCT/DE2010/000043
Other languages
German (de)
French (fr)
Inventor
Gabriel Curio
Vadim Nikulin
Original Assignee
Charité - Universitätsmedizin Berlin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE200910005414 priority Critical patent/DE102009005414A1/en
Priority to DE102009005414.6 priority
Application filed by Charité - Universitätsmedizin Berlin filed Critical Charité - Universitätsmedizin Berlin
Publication of WO2010081470A1 publication Critical patent/WO2010081470A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/04Measuring bioelectric signals of the body or parts thereof
    • A61B5/0476Electroencephalography
    • A61B5/0478Electrodes specially adapted therefor

Abstract

The invention relates to an electrode system for non-invasively measuring bioelectric signals, in particular an EEG electrode system, comprising at least one electric connecting line (1) and an electrode component (T), which is designed as a measuring and holding element and which is coupled to the electric connecting line (1).

Description

Electrode arrangement for non-invasively measuring bio-electrical signals

The invention relates to an electrode arrangement for non-invasively measuring bio-electrical signals, in particular EEG electrode assembly (EEG - Elektroenzephalogra- fie).

Background of the Invention

Such electrode arrangements permit the measurement of bioelectric signals to living organisms. In the expression as EEG electrodes are used to measure brain waves. They are known in various embodiments.

First, it is known to arrange EEG electrodes to a transit through a measurement of brain currents in holders which are in turn formed on a cap or a network structure. The cap or the network structure are the subject then placed on the head. Such caps or networks are often made of a rubber-like material. Also, the use of elastic fibers to form a network structure can be provided. Disadvantage of this type of application of EEG electrodes is that the cap or the net structure exerts often a pressure on the head of the patient, which is perceived by the wearer as being unpleasant, and in some cases may even lead to the obstruction of blood flow in the head of the wearer , In addition, the location of the EEG electrodes in the cap or of the mesh structure is fixed and can not be changed.

There are still EEG electrodes known for non-invasive application in which the to be mounted on the head electrode assembly comprises on the one hand an electrode member, which is for detecting the measuring signals and on the other holding means which serve for fastening the electrode member at the head of the patient. Such electrode assemblies are disclosed, for example in the documents WO 01/01857 Al, US 6,640,122 B2 and WO 01/01856 Al. The retaining means in this case serve to attach the electrode member to the hair of the patient, so as to bring the serving of the measurement electrode member in the vicinity of the scalp and ultimately in contact therewith. This type of electrode arrangement is regularly complicated construction and therefore expensive to manufacture. The same design principle follows an EEG electrode from the document US 4,067,321, in which an electrical connection cable to a plate-shaped electrode is connected. an insulating plate and a plurality of legs to the insulating plate are then formed for holding the electrode.

Brainwave measurements are not only used in the medical environment. Rather, the acquisition has also been proposed in the working and leisure environment for example.

Summary of the Invention

The object of the invention is to provide an improved electrode arrangement for non-invasively measuring biolelektrischer signals which can be manufactured easy to handle and with little effort. In addition, the wearing comfort for the patient to be improved.

This object is achieved by an electrode arrangement for non-invasively measuring biolelektrischer signals, in particular EEG electrode assembly according to the independent claim. 1 Advantageous embodiments of the invention are subject matter of dependent claims.

The invention comprises the idea of ​​an electrode arrangement for non-invasively measuring biolelektrischer signals, in particular EEG electrode assembly consisting of at least one electrical connecting line and a running as a sample and hold element electrode member which is coupled to the electrical connection line.

The proposed electrode arrangement is in the prior art especially for EEG electrodes common design principle with an electrode component on the one hand, which is used for detecting the measuring signals, and a retaining means or cage assembly on the other hand, which is used for fastening the electrode member at the head of the patient, in a surprisingly easily overcome. Rather, it is provided that the electrode member itself is designed as a sample and hold element, and so fulfills the measurement function and is prepared in addition to a holding element-free attachment to the head. Typically, the attachment of the electrode component is carried on the head then be applied locally by means of a paste, cream or emulsion. A gel can be used. The added in the prior art material and manufacturing cost of the holding means for receiving the E- lektrodenbauteils, so for example, the cap or the network structure or the support members of individual electrodes is saved.

With the help of the electrode assembly created an improved miniaturization in connection with electrode assemblies for non-invasively measuring bio-electrical signals, in particular EEG electrode assemblies is further achieved. Linked to this is preferably a weight reduction. When used as EEG electrode assembly due to the improved miniaturization increased spatial sampling of the EEG potential distribution is enabled on the scalp.

The detected by means of the electrode component measurement signals to signal processing are fed through the electric cable, such as a signal amplification. At the distal end of the electrode member with respect to the power cable, a connection means may be formed, for example in the form of a plug. In the simplest case, the connection to the power cable to the secondary signal processing can also be performed via a wire end of the connecting cable though.

The electrode assembly created is particularly suitable for use in connection with a so-called brain-computer interface ( "brain-computer interface"). In experimental studies was found in this context that it was possible in an online application that to control position of a cursor on a computer screen with an accuracy of about 78%.

During field tests, it was found that the proposed electrode arrangement shows a high position stability at the head of a subject. Accelerations of greater than 2.5 g (g = 9.8 m / s 2) were tested. Such head movements took place with much greater acceleration than natural head movements. The electrode assembly was found in a stable position.

A preferred development of the invention provides that the electrode member is formed with at least one Befestigungsöffhung. With the help of the mounting opening the electrode member is configured for a possible configuration for its holding function. When fastening the electrode member at the head of the patient enters the Befestigungsöff- voltage locally applied cream, paste or emulsion a, whereby a sufficient local fixing of the electrode component is achieved.

In an expedient embodiment of the invention, can be provided that the electrode member is formed of an electrically conductive material. In particular, a wire material may be provided. As a wire material are, for example, the material Ag / AgCl, carbon fibers or other electrically conductive materials are used. In one embodiment of the invention, the wire electrode used for the wire material have an outer diameter of about 0.2mm to about 0.7mm, preferably from about 0.3mm to about 0.6mm on. This promotes a sufficient sensitivity for signal acquisition.

An advantageous embodiment of the invention provides that the electrode member is formed with a loop-shaped electrode portion. The electrode member may be formed in one embodiment as a closed loop. For example, the loop-shaped electrode portion is made as a wire loop section.

Preferably, a development of the invention provides that the loop-shaped electrode portion has an outer diameter between about lmm and about 3mm, preferably between about lmm and about 2mm.

In an advantageous embodiment of the invention, can be provided that the electrode member is formed with a hook-shaped electrode portion. An outer diameter of the hook-shaped electrode portion may preferably be between about lmm and about 2mm between about lmm and about 3mm. In the formation as EEG electrode arrangement provided for dimensioning allows both an optimized positioning on the scalp as well as a significantly increased spatial sampling of the potential distribution.

A development of the invention can provide that the electrical connection line is formed from a flexible wire material. The flexible wire material preferably has an external electrical insulation. In the wire material is, for example, copper. Preferably, the flexible wire material is formed as a single core material. The outer diameter of the flexible wire material is less than 70 .mu.m something in a preferred embodiment, preferably less than about 50 .mu.m. In the formation as EEG electrodes arrangement, the design for the comfort on the one hand enables a minimization of the weight and on the other hand, an optical 'stealth' of the measurement because such a wire material can be placed visually inconspicuous in the hair.

A preferred development of the invention provides that the electrical connection line having a length of at least about 30cm. Conveniently, the electrical connection line is formed in a development with a maximum length of about 100cm.

In an expedient embodiment of the invention, can be provided that a total weight for the electrical connection line and the electrode member is less than about 50 mg, preferably less than about 40mg, and more preferably less than about 30mg.

An advantageous embodiment of the invention provides that the electrode member is formed adhesive-free. In contrast, it is known from the prior art that to provide electrode member and / or the power cable with adhesive or bonding agent to assist in securing the patient's head, but this often leads to bonding with head hair.

Preferably, a development of the invention provides that the electrical connection line is formed adhesive or adhesive-free.

An advantageous embodiment of the invention provides a Einwegartikel- before execution.

Description of Preferred Embodiments of the Invention

The invention is explained in more detail below by means of preferred embodiments with reference to figures of a drawing. In the drawing: Fig. 1 is a schematic illustration of an electrode assembly having a electrical connection line and a thereto coupled electrode member, Figure 2 is a schematic illustration of a hook-shaped electrode member, Figure 3 is a graphical representation of measured EEG signals and Figure 4 is a graph of... time-dependent EEG signals. Fig. 1 shows a schematic representation of an electrode assembly that is performed in the embodiment shown as an EEG electrode assembly. In the EEG electrode arrangement an electrode member 2 is end coupled to an electrical connection cable. 1 The electrode member 2 is configured in the illustrated embodiment as an EEG electrode wire loop shape. In a practical realization of a Ag / AgCl wire was used as a wire material having an outer diameter of the electrode member 2 of about 3 mm. The power cable 1 was prepared from a copper wire having an outer electrical insulation. The length of the power cable 1 was about 50cm. The outer wire diameter was about 50 microns.

Referring to FIG. 1, a connector 3 is connected to the power cable 1 further coupled, which serves to couple the EEG electrode array to a signal processing, such as a signal amplifier.

In the non-invasive application of the EEG electrode assembly, a cream, a paste, an emulsion or a gel in which then the designed as a sample and hold element electrode member 2 is pressed on the head of the patient topically. In a further advantageous embodiment, the electrode member 2 may be provided with a gel drops and applied to the scalp by means of an applicator. In each case the locally applied substance then enters into a fastening opening 4 into the electrode member 2, whereby this is secured. an electrically conductive contact between the electrode member 2, which functions as a measuring electrode, and the scalp of the patient is established through the substance so that brain waves can be detected. A similar use of the EEG electrode assembly may be provided in animal studies.

A similar electrode assembly may be provided for the measurement of other bioelectric signals, which include, for example, the electromyogram, electrocardiogram, which Electrooculogram that electrogastrograms grams and the galvanic skin response.

Fig. 2 shows a schematic representation of another electrode member 20, which is designed as a measuring and holding member having a hook-like shape. The fixing aperture 4 is only partially enclosed, preferably at least about 2/3. The hook-shaped configuration also supports the attachment function as head hair can enter into the mounting hole 4 easily.

The above described with reference to FIG. 1 as an embodiment of EEG-electrode assembly was used to measure brain waves. The measurement results are shown in Figs. 3 and 4.

Fig. 3 shows a graph of the measured spontaneous EEG signals with closed eyes of the patient. Curve 100 was recorded with a standard EEG electrode. For detecting the curve 200 as described above with reference to Fig. 1 as a preferred embodiment EEG electrode was used. In the field of frequency of 10 Hz, a pronounced maximum, the so-called alpha rhythm, which is very similar to the curves 100 and 200 is obtained. The differences between the curves 100 and 200 occur at higher frequencies are based on the not quite exact match of the measured positions of the electrodes.

Fig. 4 shows a graph of measured evoked EEG signals. There are shown high frequency oscillations, which are triggered by stimulation of the right median nerve. The brain wave response of less than about 15OnV was for about 30ms ER sums. The curve 300 shows the measurement using a standard EEG electrode. For detecting the curve 400 in turn was used the above with reference to FIG. 1 as an embodiment of said EEG electrode. The result is a virtually identical signal noise performance. Time zero refers to the moment of stimulation.

The features disclosed in the foregoing description, the claims and the drawing characteristics of the invention may be material for realizing the invention in diverse VERSIONS of importance both individually and in any combination.

Claims

claims
1. Electrode arrangement for non-invasively measuring biolelektrischer signals, in particular EEG electrode assembly consisting of at least one electrical connecting line (1) and an electrode member is designed as a measuring and holding element (2; 20), which is coupled to the power cable (1) ,
2. Arrangement according to claim 1, characterized in that the electrode member (2; 20) with at least one fastening opening (4) is formed.
3. Arrangement according to claim 1 or 2, characterized in that the electrode member (2; 20) made of an electrically conductive material is formed.
4. An arrangement according to at least one of the preceding claims, characterized in that the electrode member (2) is formed with a loop-shaped electrode portion.
5. An arrangement according to claim 4, characterized in that the loop-shaped electrode portion has an outer diameter between about lmm and about 3mm, preferably between about lmm and about 2mm.
6. An arrangement according to at least one of the preceding claims, characterized in that the electrode member (20) is formed with a hook-shaped electrode portion.
7. An arrangement according to at least one of the preceding claims, characterized in that the electrical connecting line (1) is formed from a flexible wire material.
8. An arrangement according to at least one of the preceding claims, characterized in that the electrical connecting line (1) is formed with a length of at least about 30cm.
9. An arrangement according to at least one of the preceding claims, characterized in that a total weight for the electrical connecting line (1) and E- lektrodenbauteü (2; 20) is less than about 50 mg, preferably less than about 40mg, and more preferably less than about 30mg is.
10. An arrangement according to at least one of the preceding claims, characterized in that the electrode member (2; 20) is formed adhesive or adhesive-free.
11. An arrangement according to at least one of the preceding claims, characterized in that the electrical connecting line (1) formed adhesive or adhesive-free.
12. An arrangement according to at least one of the preceding claims, characterized by a Einwegartikel- embodiment.
PCT/DE2010/000043 2009-01-19 2010-01-19 Electrode system for non-invasively measuring bioelectric signals WO2010081470A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200910005414 DE102009005414A1 (en) 2009-01-19 2009-01-19 Electrode arrangement for non-invasively measuring bio-electrical signals
DE102009005414.6 2009-01-19

Publications (1)

Publication Number Publication Date
WO2010081470A1 true WO2010081470A1 (en) 2010-07-22

Family

ID=42124344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000043 WO2010081470A1 (en) 2009-01-19 2010-01-19 Electrode system for non-invasively measuring bioelectric signals

Country Status (2)

Country Link
DE (1) DE102009005414A1 (en)
WO (1) WO2010081470A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013142316A1 (en) * 2012-03-19 2013-09-26 Cognionics, Inc. Transducer assemblies for dry applications of transducers

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067321A (en) 1976-06-29 1978-01-10 Governor Of Tokyo Metropolis Electrodes for electroencephalographic examinations
US4155354A (en) * 1976-03-29 1979-05-22 Rasmussen Steen B Disposable electromedical electrode and a set of such electrodes
US4319579A (en) * 1979-06-21 1982-03-16 Ndm Corporation Reusable medical electrode having disposable electrolyte carrier
DE19828287A1 (en) * 1998-06-25 1999-12-30 Universitaetsklinikum Freiburg System for housing-less attachment of electromyography electrodes
WO2001001856A1 (en) 1999-07-02 2001-01-11 Baltimore Biomedical, Inc. Quick-placement electroencephalogram (eeg) electrode
WO2001001857A1 (en) 1999-07-02 2001-01-11 Baltimore Biomedical, Inc. Methods and mechanisms for quick-placement electroencephalogram (eeg) electrodes
US6640122B2 (en) 1999-02-05 2003-10-28 Advanced Brain Monitoring, Inc. EEG electrode and EEG electrode locator assembly
US20080139911A1 (en) * 2006-12-08 2008-06-12 General Electric Company Self-adhering electrodes and methods of making the same
US20080221422A1 (en) * 2007-03-08 2008-09-11 General Electric Company Sensor measurement system having a modular electrode array and method therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6487430B1 (en) * 1999-02-11 2002-11-26 Ge Medical Systems Information Technologies, Inc. Electrode connector
CA2425224A1 (en) * 2000-10-10 2002-04-18 Alan Remy Magill Health monitoring
DE102007024238A1 (en) * 2007-05-18 2008-11-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Self adhesive sensor element for medical diagnosis and therapy, prosthetics and non-medical monitoring, is fastened to detention bodies, and has sensor or receiver, electronic element, optoelectronic element and electronic element

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155354A (en) * 1976-03-29 1979-05-22 Rasmussen Steen B Disposable electromedical electrode and a set of such electrodes
US4067321A (en) 1976-06-29 1978-01-10 Governor Of Tokyo Metropolis Electrodes for electroencephalographic examinations
US4319579A (en) * 1979-06-21 1982-03-16 Ndm Corporation Reusable medical electrode having disposable electrolyte carrier
DE19828287A1 (en) * 1998-06-25 1999-12-30 Universitaetsklinikum Freiburg System for housing-less attachment of electromyography electrodes
US6640122B2 (en) 1999-02-05 2003-10-28 Advanced Brain Monitoring, Inc. EEG electrode and EEG electrode locator assembly
WO2001001856A1 (en) 1999-07-02 2001-01-11 Baltimore Biomedical, Inc. Quick-placement electroencephalogram (eeg) electrode
WO2001001857A1 (en) 1999-07-02 2001-01-11 Baltimore Biomedical, Inc. Methods and mechanisms for quick-placement electroencephalogram (eeg) electrodes
US20080139911A1 (en) * 2006-12-08 2008-06-12 General Electric Company Self-adhering electrodes and methods of making the same
US20080221422A1 (en) * 2007-03-08 2008-09-11 General Electric Company Sensor measurement system having a modular electrode array and method therefor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
G.D. ALLEN, J.F. LUBKER, AND D.T. TURNER: "Adhesion to Mucous Membrane for Electromyography" JOURNAL OF DENTAL RESEARCH, Bd. 2, 1973, Seite 391, XP002581276 *
YOSHIDA K ET AL: "EMG approach to assessing tongue activity using miniature surface electrodes." JOURNAL OF DENTAL RESEARCH OCT 1982 LNKD- PUBMED:6956594, Bd. 61, Nr. 10, Oktober 1982 (1982-10), Seiten 1148-1152, XP002581277 ISSN: 0022-0345 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013142316A1 (en) * 2012-03-19 2013-09-26 Cognionics, Inc. Transducer assemblies for dry applications of transducers

Also Published As

Publication number Publication date
DE102009005414A1 (en) 2010-08-12

Similar Documents

Publication Publication Date Title
Khandpur Handbook of biomedical instrumentation
JP5798565B2 (en) Head harness and radio eeg monitoring system
Chi et al. Wireless non-contact EEG/ECG electrodes for body sensor networks
JP5367579B2 (en) Dry electrode cap for EEG measurement
US5511546A (en) Finger apparatus for measuring continuous cutaneous blood pressure and electrocardiogram electrode
JP4496504B2 (en) Electrode array for measuring electrophysiological signals
US8560044B2 (en) Garment accessory with electrocardiogram sensors
Salvo et al. A 3D printed dry electrode for ECG/EEG recording
US20040054393A1 (en) Medical electrode
KR100895297B1 (en) A multi channel electrode sensor apparatus for measuring a plurality of physiological signals
US20070112277A1 (en) Apparatus and method for the measurement and monitoring of bioelectric signal patterns
US4685466A (en) Measuring sensor for the non-invasive detection of electro-physiological quantities
Neuman Biopotential electrodes
US7941201B2 (en) Microprobe array structure and method for manufacturing the same
Griss et al. Micromachined electrodes for biopotential measurements
CN102596021B (en) Device for positioning electrodes on a user's scalp
US20070270678A1 (en) Wireless Electrode for Biopotential Measurement
US9826917B1 (en) Electrode harness and method of taking electrical measurements
US20090105576A1 (en) Electrode conductive element
CA2807340C (en) Retractable multi-use cardiac monitor
EP0232102A2 (en) An electroencephalographic head set with disposable electrodes and disposable electrolyte applicator
US5626135A (en) Medical electrode
US20050107716A1 (en) Methods and apparatus for positioning and retrieving information from a plurality of brain activity sensors
AU2008256767B2 (en) Method and device for quick press on EEG electrode
US7672703B2 (en) Electrode for measuring electrocardiogram and electrocardiogram device including the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10705260

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct app. not ent. europ. phase

Ref document number: 10705260

Country of ref document: EP

Kind code of ref document: A1