Electrode array

• US 8,391,948 B2
• Filed: 09/22/2006
• Issued: 03/05/2013
• Est. Priority Date: 09/23/2005
• Status: Active Grant

• Current Assignee: Brainscope SPV LLC
• Original Assignee: Brainscope Company Inc.
• Inventors: Causevic, Elvir, Christiansen, Christian, Metzger, Daniel
• Primary Examiner(s): Cohen, Lee S
• Application Number:
  US12/067,525
• Publication Number:
  US 20090018427A1
• Time in Patent Office: 2,356 Days
• Field of Search: 600/383, 600/393, 600/544, 600/546, 600/547, 600/559
• US Class Current: 600/383
• CPC Class Codes: A61B 2562/164 the sensor is mounted in or on a conformable substrate or carrier
• CPC Class Codes: A61B 5/291 for electroencephalography [EEG]
• CPC Class Codes: A61B 5/38 Acoustic or auditory stimuli
• CPC Class Codes: A61B 5/6803 Head-worn items, e.g. helmets, masks, headphones or goggles
• CPC Class Codes: A61B 5/6814 Head

Abstract

A disposable electrode array 100, 200 including a flexible member 106, 206 in which a plurality of electrodes 102, 202 are disposed, having a shape adapted to contact the forehead skin surface on a human patient. A pair of ear loops 104, 204 coupled to the disposable electrode array 100, 200 secure the disposable electrode array 100, 200 about the patient'"'"'s ears, with the flexible member 106, 206 disposed across the patient'"'"'s bow, retaining the electrodes 102, 202 against the skin surface. Additional electrodes 102, 202 are disposed in proximity to the ear loops 104, 204 and are configured to contact the skin surface behind the patient'"'"'s ears. An auditory stimulus delivery element 116, 216 is coupled with each of the ear loops 104, 204, and positioned to seat in proximity to the patient'"'"'s ear canal for the delivery of auditory stimulus. Electrical conductors associated with the electrodes 102, 202 and the stimulus delivery elements 116, 216 are routed within the flexible member 106, 206 to a common external connection point 118, 218 for connection to an external system. The disposable electrode array 100, 200 may be configured for both evoking and measuring evoked bio-potentials in the human subject, or for measuring bio-potentials evoked using a separate stimulus delivery system.

Claims

1. An electrode array for measuring bio-potential signals from a skin surface, consisting essentially of:

a pair of ear loops, each ear loop configured to fit around an ear of a human patient, and each ear loop further comprising at least one ear loop electrode;

a flexible web coupled between said pair of ear loops and supporting a plurality of electrodes thereon, said flexible web configured to span a forehead of said human patient, and said plurality of electrodes configured for placement against a skin surface on the forehead of said human patient;

wherein the ear loops and the flexible web are configured to retain the flexible web in tension across the forehead of said human patient and to position the plurality of electrodes operatively in place on the forehead when the pair of ear loops are secured about the ears of the human patient.

2. The electrode array of claim 1 wherein each of said plurality of electrodes is operatively coupled via an associated electrical conductor to a common external connection point.

3. The electrode array of claim 2 wherein each of said associated electrical conductors is routed internally through said flexible web.

4. The electrode array of claim 1 further including an auditory stimulator centrally disposed within each of said pair of ear loops for placement adjacent an ear canal, each of said auditory stimulators configured to generate an auditory stimuli.

5. The electrode array of claim 4 wherein each of said auditory stimulators is operatively coupled via an associated electrical conductor to a common external connection point.

6. The electrode array of claim 1 wherein said at least one ear loop electrode is disposed about said ear loop substantially opposite from said flexible web.

7. The electrode array of claim 1 further including an adhesive material disposed around each of said electrodes.

8. The electrode array of claim 1 further including an external connection for establishing an electrical connection to each of said plurality of electrodes.

9. The electrode array of claim 1 wherein each of said ear loops is composed of a flexible material.

10. The electrode array of claim 1 wherein each of said ear loops is composed of a substantially rigid material.

11. The electrode array of claim 1 wherein at least one electrode in said plurality of electrodes is secured to said flexible web with at least one break-away tab and supported on at least one flexible connector coupled to said flexible web, said at least one flexible connector configured to permit a range of movement of said electrode following severing of said at least one break-away tab to facilitate placement of said electrode on said skin surface.

12. The electrode array of claim 11 wherein at least four electrodes are disposed within a central portion of said flexible web in a fixed configuration.

13. The electrode array of claim 1 wherein each of said at least one ear loop electrodes is supported on an associated flexible connector coupled to said ear loop, and is secured to said ear loop with at least one break-away tab, said flexible connector configured to permit a range of movement of said at least one ear loop electrode following severing of said at least one break-away tab to facilitate placement of said at least one ear loop electrode on said skin surface.

14. A method for using an electrode array having a pair of ear loops and a flexible web coupled between said pair of ear loops, each ear loop configured to fit around an ear of a human patient and mounting at least one ear loop electrode, and the flexible web spanning a forehead of the human patient and supporting a plurality of electrodes thereon for placement against a skin surface on the forehead of the human patient, the method including the steps of:

securing a first ear loop in the pair of ear loops about an ear of the human patient, wherein said step of securing said first ear loop includes positioning the at least one ear loop electrode associated with the first ear loop;

disposing the flexible web across the forehead of the human patient; and

securing a second ear loop in the pair of ear loops about an opposite ear of the human patient, wherein said step of securing said second ear loop includes positioning the at least one ear loop electrode associated with the second ear loop;

whereby the flexible member web is anchored across the forehead of the human patient and is retained in tension against the brow by tension between the pair of ear loops; and

whereby

the plurality of electrodes on the flexible web are operatively positioned on the forehead of the human patient.

15. The method of claim 14 further including the step of altering a position of at least one of said plurality of electrodes independent of the position of said flexible web against said forehead.

16. The method of claim 15 wherein said step of altering said position includes severing at least one break-away connector between at least one of said plurality of electrodes and said flexible web.

17. The method of claim 14 wherein said step of positioning said first ear loop includes positioning the at least one ear loop electrode associated with the first ear loop against the patient'"'"'s skin in proximity to a mastoid bone;

and wherein said step of positioning said second ear loop includes positioning the at least one ear loop electrode associated with the second ear loop against the patient'"'"'s skin in proximity to the mastoid bone opposite from the at least one ear loop electrode associated with the first ear loop.