US20100274152A1 - Device and method for performing electroencephalography - Google Patents

Device and method for performing electroencephalography Download PDF

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Publication number
US20100274152A1
US20100274152A1 US12/740,639 US74063908A US2010274152A1 US 20100274152 A1 US20100274152 A1 US 20100274152A1 US 74063908 A US74063908 A US 74063908A US 2010274152 A1 US2010274152 A1 US 2010274152A1
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Prior art keywords
anchor
patient
electrodes
forehead
arm
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US12/740,639
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John P. McPeck
Kathleen M. Principe
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Hydrodot Inc
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Hydrodot Inc
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Assigned to HYDRODOT, INC. reassignment HYDRODOT, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MCPECK, JOHN P., PRINCIPE, KATHLEEN M.
Publication of US20100274152A1 publication Critical patent/US20100274152A1/en
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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
    • A61B5/40—Detecting, measuring or recording for evaluating the nervous system
    • A61B5/4076—Diagnosing or monitoring particular conditions of the nervous system
    • A61B5/4094—Diagnosing or monitoring seizure diseases, e.g. epilepsy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
    • 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
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/369—Electroencephalography [EEG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4836—Diagnosis combined with treatment in closed-loop systems or methods
    • A61B5/4839—Diagnosis combined with treatment in closed-loop systems or methods combined with drug delivery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6814—Head
    • 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
    • A61B5/6832—Means for maintaining contact with the body using adhesives
    • A61B5/6833—Adhesive patches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0406—Constructional details of apparatus specially shaped apparatus housings
    • A61B2560/0412—Low-profile patch shaped housings
    • 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
    • A61B2562/04—Arrangements of multiple sensors of the same type
    • A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array
    • 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
    • A61B2562/12—Manufacturing methods specially adapted for producing sensors for in-vivo measurements
    • 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
    • A61B2562/14—Coupling media or elements to improve sensor contact with skin or tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/6803—Head-worn items, e.g. helmets, masks, headphones or goggles
    • 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
    • A61B5/6832—Means for maintaining contact with the body using adhesives

Definitions

  • Electroencephalography is a technique for measuring the electrical activity of the brain by recording the electrical activity from electrodes placed on the scalp.
  • the graph produced by electroencephalography is called an electroencephalogram (EEG).
  • Electroencephalography has a number of advantages over other diagnostic techniques, such as magnetic resonance imaging, in that electroencephalography records the electrical activity of the brain and does not require the patient to remain still for extended periods. Electroencephalography is generally performed by placing electrodes on the scalp using a conductive gel or paste, where each electrode is attached to an individual wire which isolates the activity at the position of the electrode. The names and locations of the electrodes are usually specified using the International 10-20 system for consistency between institutions, where 21 electrodes are used in testing an adult. A ground electrode or a ground electrode and a reference electrode are also generally used in testing.
  • NCSE non-convulsive status epilepticus
  • seizure seizure
  • stroke It is difficult to diagnose brain injuries such as NCSE and strokes in many patients, particularly those who have altered mental status or who are comatose without performing electroenchalography.
  • electroencephalography as a diagnostic technique is underutilized, such as in the emergency room (ER), Intensive Care Unit (ICU), operating room (OR), at accident scenes and in a battlefield situation.
  • ER emergency room
  • ICU Intensive Care Unit
  • OR operating room
  • routine electroencephalography as a part of a primary medical examination is generally not performed, in part because of the difficulty of placing the electrodes properly.
  • currently used electroencephalography devices are costly to produce, and are therefore cleaned between uses so that the devices can be reused on other patients. The cleaning and disinfecting process is time consuming.
  • a device for performing electroencephalography on a patient comprises a sagittal portion comprising: i) a forehead anchor comprising two arms, a first forehead anchor arm and an opposing second forehead anchor arm; ii) a neck anchor comprising two arms, a first neck anchor arm and an opposing second neck anchor arm; iii) a midsection between the forehead anchor and the neck anchor; and iv) a plurality of imbedded electrodes within the forehead anchor, and the midsection.
  • the device further comprises: a coronal portion comprising a plurality of imbedded electrodes; and electrical connectors for electrically connecting the imbedded electrodes in the sagittal portion and the coronal portion to an electroencephalograph.
  • the sagittal portion and the coronal portion comprise a contact surface, and the contact surface comprises a silicone based adhesive for reversibly attaching the device to the patient.
  • the sagittal portion or the coronal portion or both the sagittal portion and the coronal portion comprise a release film covering the contact surface.
  • the forehead anchor further comprises a third forehead anchor arm between the first forehead anchor arm and the second forehead anchor arm.
  • the neck anchor further comprises a third neck anchor arm between the first neck anchor arm and the second neck anchor arm.
  • the imbedded electrodes in the forehead anchor consist of electrodes positioned at positions F 7 , F P1 , F P2 , F 8 of the International Standard 10-20 System for electrode placement.
  • the imbedded electrodes in the midsection consist of electrodes positioned at positions F Z , C Z , P Z , O 1 and O 2 of the International Standard 10-20 System for electrode placement.
  • the forehead anchor further comprises a reference electrode or a ground electrode or a reference electrode and a ground electrode.
  • a plurality of sponges are attached to the embedded electrodes.
  • one or more than one of the plurality of sponges contains a conductive gel.
  • a device for performing electroencephalography on a patient comprises a coronal portion comprising: i) a first ear anchor comprising a front arm and a rear arm; ii) a second ear anchor comprising a front arm and a rear arm; iii) a midsection between the first ear anchor and the second ear anchor; and iv) a plurality of imbedded electrodes within the first ear anchor, the midsection and the second ear anchor.
  • the device further comprises a sagittal portion comprising a plurality of imbedded electrodes; and electrical connectors for electrically connecting the imbedded electrodes in the sagittal portion and the coronal portion to an electroencephalograph.
  • the sagittal portion and the coronal portion comprise a contact surface, and the contact surface comprises a silicone based adhesive for reversibly attaching the device to the patient.
  • the sagittal portion or the coronal portion or both the sagittal portion and the coronal portion comprise a release film covering the contact surface.
  • the imbedded electrode in the first ear anchor is positioned at position A 1 of the International Standard 10-20 System for electrode placement.
  • the imbedded electrode in the second ear anchor is positioned at position A 2 of the International Standard 10-20 System for electrode placement.
  • the imbedded electrodes in the midsection consist of electrodes positioned at positions T 3 , C 3 , C 4 , and T 4 of the International Standard 10-20 System for electrode placement.
  • a plurality of sponges are attached to the embedded electrodes.
  • one or more than one of the plurality of sponges contains a conductive gel.
  • a device for performing electroencephalography on a patient comprising: a sagittal portion comprising: i) a forehead anchor comprising two arms, a first forehead anchor arm and an opposing second forehead anchor arm; ii) a neck anchor comprising two arms, a first neck anchor arm and an opposing second neck anchor arm; iii) a midsection between the forehead anchor and the neck anchor; and iv) a plurality of imbedded electrodes within the forehead anchor, and the midsection.
  • the device further comprises a coronal portion comprising: i) a first ear anchor comprising a front arm and a rear arm; ii) a second ear anchor comprising a front arm and a rear arm; iii) a midsection between the first ear anchor and the second ear anchor; and iv) a plurality of imbedded electrodes within the first ear anchor, the midsection and the second ear anchor.
  • the device further comprises electrical connectors for electrically connecting the imbedded electrodes in the sagittal portion and the coronal portion to an electroencephalograph.
  • the sagittal portion and the coronal portion comprise a contact surface, and the contact surface comprises a silicone based adhesive for reversibly attaching the device to the patient.
  • the sagittal portion or the coronal portion or both the sagittal portion and the coronal portion comprise a release film covering the contact surface.
  • a plurality of sponges are attached to the embedded electrodes.
  • one or more than one of the plurality of sponges contains a conductive gel.
  • the forehead anchor further comprises a third forehead anchor arm between the first forehead anchor arm and the second forehead anchor arm.
  • the neck anchor further comprises a third neck anchor arm between the first neck anchor arm and the second neck anchor arm.
  • the imbedded electrodes in the forehead anchor consist of electrodes positioned at positions F 7 , F P1 , F P2 , F 8 of the International Standard 10-20 System for electrode placement.
  • the imbedded electrodes in the midsection consist of electrodes positioned at positions F Z , C Z , P Z , O 1 and O 2 of the International Standard 10-20 System for electrode placement.
  • the forehead anchor further comprises a reference electrode or a ground electrode or a reference electrode and a ground electrode.
  • the imbedded electrode in the first ear anchor is positioned at position A 1 of the International Standard 10-20 System for electrode placement.
  • the imbedded electrode in the second ear anchor is positioned at position A 2 of the International Standard 10-20 System for electrode placement.
  • the imbedded electrodes in the midsection consist of electrodes positioned at positions T 3 , C 3 , C 4 , and T 4 of the International Standard 10-20 System for electrode placement.
  • a device for performing electroencephalography on a patient comprising: a sagittal portion comprising a plurality of imbedded electrodes; a coronal portion comprising a plurality of imbedded electrodes; and electrical connectors for electrically connecting the imbedded electrodes in the sagittal portion and the coronal portion to an electroencephalograph.
  • the sagittal portion and the coronal portion each comprise a contact surface that comprises a silicone based adhesive for reversibly attaching the device to the patient.
  • the sagittal portion or the coronal portion or both the sagittal portion and the coronal portion comprise a release film covering the contact surface.
  • a method of performing electroencephalography on a patient comprises: providing a device for performing electroencephalography on the patient, the device comprising: a sagittal portion and a coronal portion, each of the sagittal portion and the coronal portion comprising a plurality of imbedded electrodes; and electrical connectors for electrically connecting the imbedded electrodes in the sagittal portion and the coronal portion to an electroencephalograph.
  • the method further comprises affixing the device to the patient; and producing an electroencephalogram.
  • the device comprises a liner, and the method further comprises removing the liner before affixing the device.
  • the device comprises a stabilizing strip, and affixing the device to the patient further comprises affixing the stabilizing strip to the sagittal portion or the coronal portion or the sagittal portion and the coronal portion, and to the patient.
  • affixing the device to the patient further comprises affixing the forehead anchor to the forehead of the patient, affixing the midsection along a sagittal midline of the head of the patient and affixing the neck anchor to the base of the skull proximal the neck of the patient.
  • affixing the device to the patient further comprises affixing the first ear anchor around the left ear of the patient and affixing the second ear anchor around the right ear of the patient.
  • a method of diagnosing a neurologic condition or disease comprises: selecting a patient potentially with the neurologic condition or disease.
  • the method further comprises: providing a device for performing electroencephalography on the patient, the device comprising: a sagittal portion and a coronal portion, each of the sagittal portion and the coronal portion comprising a plurality of imbedded electrodes; and electrical connectors for electrically connecting the imbedded electrodes in the sagittal portion and the coronal portion to an electroencephalograph.
  • the method further comprises: affixing the device to the patient; and producing an electroencephalogram.
  • the method further comprises diagnosing the neurologic condition or disease by interpreting the electroencephalogram.
  • the method further comprises treating the neurologic condition or disease that is diagnosed.
  • the neurologic condition or disease is non-convulsive status epilepticus or an epileptic seizure or a stroke.
  • FIG. 1 is a drawing showing the standard placement of electrodes in the standard 10-20 system for EEG electrode placement
  • FIG. 2 is a schematic view of a device for performing electroencephalography according to an embodiment of the present invention
  • FIG. 3 is a cross sectional view of the device of FIG. 2 taken along line 3 - 3 ;
  • FIG. 4 is a partial cut away lateral perspective view of a stabilizing strip for use with the device of FIG. 2 according to an embodiment of the present invention
  • FIG. 5 is a schematic view of a device for performing electroencephalography according to an additional embodiment of the present invention.
  • FIG. 6 is a top perspective view showing placement of the electroencephalography device of FIG. 2 on the head of a patient according to an embodiment of the present invention.
  • FIG. 7 is a lateral perspective view showing placement of the electroencephalography device of FIG. 2 on the head of a patient according to an embodiment of the present invention.
  • the electroencephalography device comprises an EEG headpiece made with inexpensive materials and designed to be disposable.
  • the electroencephalography device comprises a self-adhesive backing and integrated circuitry connected to self-prepping, pre-gelled imbedded electrodes.
  • the electroencephalography device utilizes a modified 10-20 electrode positioning system having fewer electrodes than the standard 10-20 placement for simple recording, but with sufficient EEG locations to record information over critical brain locations.
  • the device provides sufficient EEG channels to determine if the patient's brain activity is normal or abnormal and to then quickly treat the patient based on the interpretation of the EEG.
  • the electroencephalography device can be easily applied by technicians or other medical personnel with minimal training, allowing the electroencephalography device to be used in situations where electroencephalography is currently difficult to perform because of the complex placement of the electrodes, such as in the emergency room (ER), Intensive Care Unit (ICU), operating room (OR), at accident scenes and in a battlefield situation. Additionally, the electroencephalography device can be used to record cortical evoked potentials and EEG recordings during sleep studies, or other studies as will be understood by those with skill in the art with reference to this disclosure.
  • the method comprises providing an electroencephalography device according to the present invention, and recording an EEG.
  • kits for performing electroencephalography comprising an electroencephalography device according to the present invention.
  • the device, method and kit will now be disclosed in detail.
  • two elements of an electroencephalography device are “integral” or “integrated” if they are joined together in a manner that does not allow separation of the two elements from one another by the user of the device without diminishing or destroying the function one or both of the two elements.
  • the electroencephalography device of the present invention and its component parts comprise any suitable material for the intended purpose of the electroencephalography device, as will be understood by those with skill in the art with reference to this disclosure. Reference to specific materials in this disclosure are by way of example only.
  • the electroencephalography device of the present invention and its component parts can be constructed according to standard techniques, as will be understood by those with skill in the art with reference to this disclosure.
  • FIG. 1 a drawing showing the standard placement of electrodes in the standard 10-20 system for EEG electrode placement.
  • the standard 10-20 system for electrode placement there are 21 electrodes placed at positions F P1 , F P2 , F 7 , F 3 , F z , F 4 , F 8 , A 1 , T 3 , C 3 , C Z , C 4 , T 4 , A 2 , T 5 , P 3 , P Z , P 4 , T 6 , O 1 and O 2 (given from front to back, left side to right side).
  • the electrodes are placed on F P1 , F P2 , F 7 , F Z , F 8 , A 1 , T 3 , C 3 , C Z , C 4 , T 4 , A 2 , P Z , O 1 and O 2 .
  • the electroencephalography device can have one or more of a reference electrode and a ground electrode. These electrodes are typically placed at locations F PZ and AF Z on a standard 10-10 system for electrode placement (not shown).
  • the present invention is an electroencephalography device for performing electroencephalography.
  • FIG. 2 there is shown a schematic view of an electroencephalography device for performing electroencephalography according to the present invention.
  • the electroencephalography device 10 comprises two portions, a coronal portion 12 depicted on the left side of FIG. 1 , and a sagittal portion 14 depicted on the right side of FIG. 1 .
  • the coronal portion 12 and the sagittal portion 14 of the electroencephalography device 10 are integrally connected at or near their axial midpoints.
  • the device 10 has a base layer 16 .
  • the base layer 16 is a plastic, such as for example a polyester material having a thickness of between about 3 and about 5 mil.
  • Conductive silver circuitry 18 is placed onto the outer layer 16 , such as by printing.
  • a plurality of electrodes 20 are placed at specific locations in contact with the silver circuitry 18 , such as by printing.
  • the electrodes 20 are silver/silver chloride.
  • the silver circuitry 18 leads from each electrode 20 and terminates in connectors 22 .
  • the connectors 22 are configured to mate with corresponding connectors (not shown) on a reusable EEG interface cable with 10-20 labeled DIN connectors that plug into any standard EEG recording system head box with standard DIN inputs.
  • a reusable EEG interface cable with 10-20 labeled DIN connectors that plug into any standard EEG recording system head box with standard DIN inputs.
  • Those of skill in the art will recognize that other conductive materials may be used for the circuitry 18 and the electrodes 20 .
  • a dielectric layer 24 covers the silvers circuitry 18 and outer layer 16 to insulate the circuitry.
  • the dielectric layer 24 is a polymer composition, has a thickness of between about 0.5 and about 2.0 mil, and is printed over the silver circuitry 18 and the outer layer 16 .
  • the dielectric layer is 5018 UV Curable Dielectric sold by DuPont Microcircuit Materials, Research Triangle Park, N.C. USA.
  • a sponge adhesive 26 is placed in the area around the electrodes 20 . Sponges 28 are adhered to the sponge adhesive 26 , thereby imbedding the sponges 28 in contact with the electrodes 20 .
  • An acrylic adhesive layer 30 covers the dielectric layer 24 .
  • the acrylic adhesive layer 30 has a thickness of between about 1 and about 3 mil.
  • a film layer 32 covers the acrylic adhesive 30 .
  • the film layer 32 is a polyester material having a thickness between about 0.5 and about 1.5 mil.
  • a silicone based adhesive layer 34 covers the film layer 28 .
  • the silicone based adhesive layer 34 has a thickness of between about 4 and about 8 mil, and more preferably between about 5 and about 7 mil.
  • the silicone based adhesive layer functions as a contact surface where the electroencephalography device contacts the head of a patient.
  • a release film 36 covers the silicone based adhesive layer 34 .
  • silicone based adhesive comprises adhesives made from polydimethylsiloxanes (PDMS). Some methyl groups in the polydimethylsiloxanes can be substituted by other organic groups or atoms, for example hydrogen, hydroxyl, vinyl, polyethylene oxide, methoxy and fluoride groups, to modify the properties of the adhesive.
  • the silicone based adhesive is the silicone based adhesive found in BIOFLEX RX1268S, sold by Scapa North America, Windsor, Conn. USA.
  • the silicone based adhesive layer 34 covers the dielectric layer 24 with no acrylic adhesive layer 30 or film layer 32 .
  • a conductive gel 38 such as KCl gel or hyrdrogel, is soaked into the sponges 28 .
  • the device 10 is placed into a tray (not shown) having a plurality of wells 40 .
  • the pre-soaked sponges sit within the wells 40 to protect the fluid contained therein.
  • the wells can be filled with additional conductive gel.
  • the release film 36 has wells 40 that extend over the pre-soaked sponges 34 .
  • the device 10 is manufactured from two separate pieces.
  • a first piece with the base layer 16 , silver circuitry 18 , electrodes 20 , dielectric layer 24 and sponge adhesive 26 is attached to a second piece having the acrylic adhesive 30 , film layer 32 , silicone adhesive layer 34 and release film 36 .
  • the second piece may be a commercially available double coated co-polyester film with a release paper (not shown) over the acrylic adhesive 30 .
  • the second piece Prior to attachment with the first piece, the second piece is cut, such as with a laser, to make holes in the second layer corresponding to the electrodes 20 and sponge adhesive 26 in the first piece, the release paper removed and the acrylic adhesive 30 coupled to the dielectric layer 24 .
  • the sponges 28 are attached to the sponge adhesive 26 .
  • the double coated co-polyester film is BIOFLEX RX1268S, sold by Scapa North America, Windsor, Conn. USA.
  • the sagittal portion 14 comprises a forehead anchor 44 with an array of pre-gelled electrodes, where the electrodes are positioned across the forehead in predetermined International 10-20 System locations, such as for example F P1 , F P2 , F 7 , F 8 , a reference® electrode and a ground electrode (G).
  • the forehead anchor has a first forehead anchor arm 46 and a second forehead anchor arm 48 .
  • the first forehead anchor arm 46 and the second forehead anchor arm 48 extend in opposing directions.
  • the forehead anchor 44 also has a third forehead anchor arm 50 located between the first forehead anchor arm 46 and the second forehead anchor arm 48 .
  • a midsection 52 extends from the forehead anchor 44 .
  • the midsection 52 has an anterior to posterior array of pre-gelled electrodes positioned in predetermined 10-20 locations, such as for example, F Z , C Z , P Z , O 1 and O 2 .
  • the midsection terminates in a neck anchor 54 at the base of the skull (shown at the bottom of FIG. 2 ).
  • the neck anchor 54 has a first neck anchor arm 56 and a neck anchor second arm 58 .
  • the first neck anchor arm 56 and the second neck anchor arm 58 extend in opposing directions perpendicular to the midsection 52 .
  • the neck anchor 54 also has a third neck anchor arm 60 located between the first neck anchor arm 56 and the second neck anchor arm 58 .
  • the coronal portion 12 comprises an array of pre-gelled electrodes positioned in predetermined 10-20 locations, such as for example A 1 , T 3 , C 3 , C 4 , T 4 and A 2 (shown in FIG. 1 and FIG. 2 ).
  • predetermined 10-20 locations such as for example A 1 , T 3 , C 3 , C 4 , T 4 and A 2 (shown in FIG. 1 and FIG. 2 ).
  • the electrodes When placed on the patient the electrodes are located transversely along the central coronal plane from the predetermined 10-20 location beginning at A 1 on the left side of the head behind the left ear on the mastoid, continuing on the left side with pre-gelled electrode locations T 3 and C 3 , transecting location C Z of the International 10-20 System and continuing on the right side with pre-gelled electrode locations C 4 and T 4 and terminating at predetermined 10-20 location A 2 on the right side of the head behind the right ear on the mastoid.
  • the coronal portion 12 comprises a first ear anchor 62 , having a front arm 64 configured to be placed around and in front of the left ear of the patient and a rear arm 66 configured to be placed around and behind the left ear of the patient.
  • An electrode for 10-20 location A 1 is located on the rear arm 66 .
  • a midsection 68 extends from the first ear anchor 62 .
  • the midsection 68 terminates in a second ear anchor 70 .
  • the second ear anchor has a front arm 72 configured to be placed around and in front of the right ear of the patient and a rear arm 74 configured to be placed around and behind the right ear of the patient.
  • An electrode for 10-20 location A 2 is located on the rear arm 74 .
  • the electroencephalography device 10 additionally comprises one or more than one adhesive coated stabilizing strip 76 to attach the midsection 52 of the sagittal portion 14 proximal to the electrodes over 10-20 locations O 1 and O 2 to the mastoid bones of the patient.
  • the stabilizing strip 76 can attach the forehead anchor 44 proximal to the electrodes over 10-20 locations F 7 and F 8 to the head of the patient.
  • the stabilizing strip has a base layer 82 , which may be a polyester film, covered with a silicone based adhesive 84 .
  • a release film 86 covers the silicone adhesive 86 .
  • an electroencephalography device 100 is configured to cover all of the 10-20 electrode locations.
  • the structure of this embodiment is similar to the embodiment shown in FIG. 2 .
  • the midsection 52 of the sagittal portion 14 is configured to provide electrodes at 10-20 locations T 5 and T 6 .
  • Stabilizing strips 76 can be used to attach the midsection of 52 of the sagittal portion 14 proximal to the electrodes at 10-20 locations T 5 and T 6 to the mastoid bones of the patient.
  • the midsection 68 of the coronal portion 12 is configured to provide electrodes at 10-20 locations F 3 , F 4 , P 3 and P 4 .
  • Stabilizing strips 76 can be used to attach the midsection 68 of the coronal portion 12 proximal to the electrodes at 10-20 locations F 3 , F 4 , P 3 and P 4 to the sagittal strip or to the head of a wearer.
  • the electroencephalography device is configured with different combinations of electrodes for specific usages.
  • the electroencephalography device may be configured so that the coronal portion has electrodes at 10-20 locations A 1 , C 4 , C 3 and A 2 , and the sagittal portion has reference and ground electrodes and electrodes at 10-20 locations F 3 , F 4 , C Z , O 1 , O 2 .
  • the electroencephalography device may be configured to have electrodes at locations other than 10-20 locations.
  • the sagittal portion may also be configured to have an electrode at location O Z of the 10-10 system for EEG electrode placement.
  • the electroencephalography device is a disposable EEG headpiece, that is, the electroencephalography device is inexpensive enough to manufacture that it can be considered disposable in routine use.
  • the coronal portion 12 and the sagittal portion 14 can be used separately or in combination.
  • FIG. 6 and FIG. 7 are respectively, a top perspective view showing placement of the electroencephalography device of FIG. 2 on the head of a patient ( FIG. 6 ); and a lateral perspective view showing placement of the electroencephalography device of FIG. 2 on the head of a patient ( FIG. 7 ).
  • the method steps disclosed are not intended to be limiting nor are they intended to indicate that each step is essential to the method or that each step must occur in the order disclosed.
  • a suitable patient is selected.
  • the patient is known to have a disease of the brain, or is suspected of having a disease of the brain that can be identified or quantified by electroencephalography.
  • the patient is known to have, or is suspected of having non-convulsive status epilepticus.
  • the patient is known to have, or is suspected of having an epileptic seizure.
  • the patient is known to have, or is suspected of having a stroke.
  • the sagittal portion 14 of the electroencephalography device is attached to the patient.
  • the patient's forehead is cleaned and dried, such as for example by wiping the patient's forehead with a gauze pad.
  • the patient's hair is parted along the midline sagittally to expose the patient's scalp, such as for example by using the end of a cotton-tipped applicator to part the hair.
  • the forehead anchor 44 of the electroencephalography device 10 is positioned over the nasion.
  • the release film 36 is removed from the forehead anchor 44 of the electroencephalography device 10 exposing the pre-gelled, sponge covered electrodes and the electroencephalography device is attached to the skin of the patient's forehead.
  • the remainder of the sagittal portion 14 is attached to the scalp of the patient by removing the remainder of the release film 36 and pressing it along the remainder of the sagittal portion 14 as the device is applied to the C z location at the vertex and posteriorly to the P Z , O 1 and O 2 locations on the scalp.
  • the neck anchor 54 is attached to the base of the skull and the back of the neck.
  • the coronal portion 12 of the electroencephalography device 10 is attached to the patient.
  • the patient's hair is parted along the central coronal plane towards the left ear, if necessary.
  • the release liner 36 covering a left side of the coronal portion 12 of the electroencephalography device is removed, and the left side of the coronal portion is attached to the patient's scalp beginning at the C Z location.
  • the left side of the coronal portion is attached to the scalp and the electrodes therein secured to the scalp along the left central plane by removing the adhesive liner toward the first ear anchor 62 .
  • the release liner 36 is removed from the rear arm 66 of the first ear anchor 62 and the rear arm 66 and the electrode for the A 1 location are attached the mastoid behind the left ear. Then, the release liner 36 is removed from the front arm 68 of the first ear anchor 62 and the front arm 68 is attached in front of the left ear.
  • the hair along the central coronal plane is parted towards the right ear, if necessary.
  • the release liner 36 cover a right side of the coronal portion 12 of the electroencephalography device is removed and the right side of the coronal portion is attached to the patient's scalp beginning at the C Z location.
  • the right side of the coronal portion is attached to the scalp and the electrodes therein secured to the scalp along the right central plane by removing the adhesive liner toward the second ear anchor 70 .
  • the release liner 36 is removed from the rear arm 74 of the second ear anchor 70 and the rear arm 74 and the electrode for the A 2 location are attached to the mastoid behind the right ear.
  • the release liner 36 is removed from the front arm 72 of the second ear anchor 70 and the front arm 72 is attached in front of the right ear.
  • the electroencephalography device comprises one or more than one stabilizing strip 76 to attach the midsection 52 of the sagittal portion 14 of the electroencephalography device over the mastoid bones of the patient, and the method further comprises attaching the one or more than one strip over the mastoid bones by removing the release liner 82 on one stabilizing strip 76 , parting the hair (if necessary) along the plane from T 3 to O 1 , attaching the stabilizing strip 76 over the mastoid bone, attaching the stabilizing strip to the scalp toward the O 1 electrode site, and attaching the end of the stabilizing strip proximate to the O 1 electrode. Corresponding steps are performed to attach the second strip along the plane from T 4 to O 2 and attaching the end of the second strip proximate to the O 2 electrode.
  • the method then comprises mating the electroencephalography device with a reusable EEG cable suitable for use with any EEG system according to techniques well known to those with skill in the art, such as for example by connecting the connectors on the electroencephalography device to the reusable EEG interface cable and plugging the 10-20 labeled DIN connectors at the terminal end of the EEG interface cable into the appropriate 10-20 EEG head box locations.
  • the method then comprises using the electroencephalography device to obtain an electroencephalogram of the patients brain function.
  • the electroencephalography device can be removed from the patient.
  • the coronal portion 12 is removed by peeling the first ear anchor 62 and the second ear anchor 70 off from around the patient's ears.
  • the coronal portion 12 is then peeled toward the midline of the head and then back toward the back of the head to remove the coronal portion 12 .
  • the forehead anchor 44 of the sagittal portion 14 is peeled away from the patient's forehead and the sagittal portion 14 is peeled off the patient's head toward the inion.
  • a method of treating a disease or condition comprises, first, performing electroencephalography according to the present invention. Then, the disease or condition is diagnosed. Next, the disease or condition that is diagnosed is treated.
  • the disease or condition is non-convulsive status epilepticus.
  • the disease or condition is an epileptic seizure.
  • the disease or condition is a stroke.
  • the method further comprises treating the diagnosed disease or condition.
  • treating the patient further comprises administering to the patient an anti-epilepsy drug, such as valium, ativan, midazolam, fosphenetoin, lorazepam, carbamazepine, ethosuximide, Felbatol, Gabitril, Keppra, Lamictal, Lyrica, Neorontin, Phenytoin, Topamax, Trileptal, valproate, valproic acid or Zonegran.
  • an anti-epilepsy drug such as valium, ativan, midazolam, fosphenetoin, lorazepam, carbamazepine, ethosuximide, Felbatol, Gabitril, Keppra, Lamictal, Lyrica, Neorontin, Phenytoin, Topamax, Trileptal, valproate, valproic acid or Zonegran.

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