Frontal electrode array for patient EEG signal acquisition
First Claim
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1. An appliance for acquiring electroencephalograph signal from a patient comprising:
- a. an insulating dielectric layer comprising a patient segment and a connection segment, said patient segment being capable of being applied solely to the patient'"'"'s forehead;
b. a plurality of electrodes capable of acquiring eletroencephalograph signals from a patient on the patient segment of the dielectric layer on the side of the dielectric layer facing the patient'"'"'s skin;
c. a plurality of signal traces on the side of the dielectric layer facing the patient'"'"'s skin configured so that the plural signal traces electrically connect the plural electrodes to an appliance connector across the connection segment; and
d. a conducting shield layer on the side of the dielectric layer away from the patient'"'"'s skin covering both the patient segment and the connection segment and connected to the appliance connector in a configuration capable of functioning such that when the appliance is electrically connected to an external device the shield layer is electrically connected to ground.
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Abstract
A medical appliance for acquiring EEG signals from a patient'"'"'s head applied solely to the patient'"'"'s forehead comprising a frontal array of hydrogel electrodes. The appliance also comprises a clear dielectric layer, an electromagnetic shield layer, and signal traces from the electrodes to an appliance connector. The electrodes are generally rectangular in shape and are located at frontal positions according to the International 10-20 System. The electrodes further comprise a retaining mechanism and internal volcano tips to abrade the outer layers of the dermis for improved electrical contact and lower contact impedance.
92 Citations
16 Claims
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1. An appliance for acquiring electroencephalograph signal from a patient comprising:
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a. an insulating dielectric layer comprising a patient segment and a connection segment, said patient segment being capable of being applied solely to the patient'"'"'s forehead;
b. a plurality of electrodes capable of acquiring eletroencephalograph signals from a patient on the patient segment of the dielectric layer on the side of the dielectric layer facing the patient'"'"'s skin;
c. a plurality of signal traces on the side of the dielectric layer facing the patient'"'"'s skin configured so that the plural signal traces electrically connect the plural electrodes to an appliance connector across the connection segment; and
d. a conducting shield layer on the side of the dielectric layer away from the patient'"'"'s skin covering both the patient segment and the connection segment and connected to the appliance connector in a configuration capable of functioning such that when the appliance is electrically connected to an external device the shield layer is electrically connected to ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16)
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12. An electrode for acquiring electrical signals representative of bodily functions from a patient'"'"'s skin, said electrode comprising
a. an open cell foam pad impregnated with electrically conducting hydrogel; -
b. an annular adhesive ring surrounding the open cell foam pad and having on a side which will be in contact with a patient an adhesive substance capable of temporarily adhering the annular ring to the patient'"'"'s skin;
c. volcano tips in the space inside the annular adhesive ring which abrade the patient'"'"'s skin so as to provide improved electrode to skin impedance.
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Specification