Electroencephalogram electrode

Abstract

The invention provides an electroencephalogram electrode. The electroencephalogram electrode comprises an electrode sheet, a gauze, an O-shaped sealing ring, a liquid storing groove passage, cotton, a liquid storing groove, a liquid storing groove cover, an electrode shell, a pure silver connector, a silver wire lead, a lead passage, a fixing frame and a positioning plate, wherein the electrode sheet is embedded into the bottom of the electrode shell and is welded with the pure silver connector through the lead passage by the silver wire lead; the liquid storing groove provided with the liquid storing groove passage is accommodated in the electrode shell; a groove is formed in the bottom of the electrode shell and is matched with the O-shaped sealing ring; the cotton is arranged in the liquid storing groove and is extended to the surface of the electrode sheet; the gauze is covered on the cotton on the surface of the electrode sheet; and the electrode shell is connected with the fixing frame and the positioning plate. The electroencephalogram electrode is reasonable in structural design, low and stable in electrode impedance, stable in impedance of electrode surface and skin, low in noise and good in effect; base line drift is reduced; and conducting liquid is not required to be implemented in a test process, so detection speed is increased. Because the cover is added to seal, so the conducting liquid placed for a long time is prevented from being volatilized.

Description

technical field [0001] The invention belongs to the technical field of medical devices and relates to an electroencephalogram electrode. Background technique [0002] An EEG is the electrical activity of brain cells picked up at specific locations by electrodes placed on the surface of the scalp. Bioelectricity refers to various potentials or currents generated in organisms during life activities. But organisms are ionic conductors. To measure the bioelectrical signals of ionic conductors, a pair of electrodes must be used to convert the signals of ionic conductors into electronic conductor signals, which can then be transmitted to the input terminal of the measuring instrument for amplification and recording. How to improve the stability of electroencephalogram signal (EEG) and reduce the artifacts of the instrument is one of the effective means to accurately reflect the patient's intracranial organic disease. [0003] Existing EEG electrodes are mainly composed of electr...

AI Technical Summary

Problems solved by technology

For electrodes soaked in sodium chloride solution, if the external joint of the electrode is not made of the same metal as the electrode, it is easy to be replaced and cause corrosion, so the service life is short

[0005] 2. The EEG measurement takes a long time, about 20-30 minutes. Due to the influence of human body temperature, the conductive liquid dries up due to volatilization, which makes the contact between the electrode and the scalp poor, and the recording baseline drifts.

Sometimes in order to make the measurement accurate, it is necessary to add conductive liquid halfway, which prolongs the test time of the patient and affects the quality of the EEG

[0006] 3. The electrode is flat, and the gauze is used as the water-absorbing layer on the surface. When measuring the EEG, the electrode surface will be squeezed, and the conductive fluid will be squeezed out. When using it, the conductive fluid on the electrode surface will be insufficient, resulting in baseline drift and waveform distortion. , the noise will also be generated

[0007] 4. For the copper-plated silver-plated EEG electrode, the electrode will be corroded if the electrode is immersed in NaCl solution for a long time. inconvenient

[0008] 5. The electrolyte ions of the Ag-AgCl electrode must use a salt solution containing Clˉ

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