Dry type medical electrode

Abstract

The invention discloses a dry type medical electrode. The electrode is an elastic-clip-shaped electrode formed by a pair of conductive clips which are symmetric by two edges and crossed in tooth shape. A plurality of projections contacting with scalp are arranged at the bottoms of the conductive clips. By adopting the elastic clip-shaped electrode formed by a pair of the conductive rubber clips which are symmetric by two edges and crossed in tooth shaped, hairs are separated by the conductive tooth-shaped elastic clips, the conductive electrode fixed by the clipped hair can directly contact with the scalp, and meanwhile, rough projections are arranged on the surface of the bottom of the tooth-shaped electrode and can directly contact with the scalp, so that the skin of the scalp can be pressed to be rough, friction coefficient between the electrode and the scalp is increased, contact surface of the electrode and the scalp is enlarged, and contact impedance of the electrode and the scalp is reduced without hurting the hairs and the scalp. The dry type medical electrode is convenient to operate, and many problems caused by using of electrode adhesives (paste) in the prior art are avoided.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a dry medical electrode for recording and stimulating of medical brain nerve detection and function modulation equipment. Background technique [0002] The non-invasive recording of electrophysiological activity of cerebral cortical nerve cells mainly uses EEG, evoked potential, event-related potential, and magnetoencephalogram to collect and record. Due to the high price of magnetoencephalogram, EEG and evoked potential have become common recording methods. Since the electrophysiological signal of the brain is very weak and the external electromagnetic interference is very strong, in order to improve the signal-to-noise ratio of the detection, it is necessary to reduce the input impedance of the detection electrode as much as possible, so that there is a firm and close contact between the electrode and the scalp. [0003] At present, the recording electrodes of electroencephalo...

AI Technical Summary

Problems solved by technology

Under normal circumstances, EEG has 16~32 input leads, and each lead requires at least one electrode. Therefore, dozens of electrodes need to be installed to detect an EEG, which makes the doctor's operation very troublesome, time-consuming and laborious.

[0004] In addition, thick hair is not easy to apply conductive paste (glue). If you apply too little, it will not stick. If you apply too much, the conductive area will expand, causing errors in the recording site and detection range, which is not conducive to brain nerve cells. Recording of electrophysiological activity

After the test is over, when the electrodes are removed, the conductive glue will solidify on the hair and scalp, and the hair will be broken, scratching the scalp, causing pain, and the remaining glue marks are difficult to clean; in addition, the electrode wires are easy to tear when the electrodes are removed. The dry paste on the electrode is also difficult to dry and clean, which shortens the service life of the electrode

[0005] In order to overcome the trouble of installing the electrodes, the prior art adopts elastic nylon caps, riveting the metal electrodes on the electrode caps, leaving a small hole in the middle of the electrodes. When installing the electrodes, first put on and fasten the electrode caps, and then Electrode glue is injected into each electrode hole so that the electrode is separated from the hair and contacts the scalp by glue. Although the electrode cap can improve the electrode installation speed, it is difficult to ensure the uniform coating of the electrode glue due to the thick and different directions of individual hair. Low resistance of electrode contacts

At the same time, the cleaning of the electrode cap is difficult and the cost is high, which is also the reason why it is difficult to popularize.

[0006] In the prior art, there is also a method of directly inserting the needle electrode into the scalp. Although this method can record electrophysiological signals very well and is quick and easy to operate, the problem that comes with it is that the needle electrode is not a non-invasive method. It is easy to cause side effects such as pain, bleeding, and infection, which cannot be accepted by patients. At the same time, the pain caused by needle electrodes also affects the results of recording or stimulation

[0007] At present, transcranial electrical stimulation technology is also used to regulate the excitability of brain function. It also needs to use electrodes that contact hair and scalp. At present, conductive glue is used to wrap and fix the electrodes. It is easy to install, clean and clean. trouble

Images