Porous metal capillary seepage microneedle electrode and preparing method

Abstract

The invention discloses a porous metal capillary seepage microneedle electrode and a preparing method. The porous metal capillary seepage microneedle electrode comprises a porous microneedle array electrode slice, an insulated shell, an electric signal line and a capillary liquid absorbing core ring, and multiple porous microneedles with groove channels are arranged on the porous microneedle arrayelectrode slice; a cavity is formed inside the insulated shell, an opening is formed in one side of the insulated shell, the porous microneedle array electrode slice and the opening of the insulatedshell are sealably spliced to form a cavity, and the cavity is filled with the capillary liquid absorbing core ring; the groove channels are communicated with the cavity. According to the porous metalcapillary seepage microneedle electrode, based on the advantages of the microneedle structures, the adsorptivity and diversion performance of the porous groove channel structures on a solution and the conductivity of the solution are utilized for achieving direct contact between a sensor and the corium layer of the skin, the contact impedance is greatly reduced, and bio-electricity signals with ahigh signal-to-noise ratio can be collected.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a porous metal capillary seepage microneedle electrode and a preparation method thereof. Background technique [0002] With the development of electronic technology and the advancement of medical detection technology, human bioelectricity extraction can provide an important basis for disease diagnosis and prevention. Sensors that can be used continuously for a long time and collect signals with high signal-to-noise ratio have attracted more and more attention. [0003] The electrode sheet is the core component of the bioelectric sensor, and its performance is directly related to the result of signal acquisition. At present, the commonly used EEG sensors and EMG sensors on the market need to be used with conductive paste in the process of collecting electrical signals. Before the test, apply the conductive paste on the skin first, and then put the electrodes on the conduc...

AI Technical Summary

Problems solved by technology

The existence of the conductive paste and the cuticle of the epidermis increases the impedance link of the test process, resulting in poor quality of the electrical signal. At the same time, the loss of the conductive paste or evaporation and drying will also cause the signal-to-noise ratio of the electrical signal to be small, and long-term use will also cause damaged skin

On the other hand, the surface of the traditional electrode sheet is relatively smooth, and it is easy to slide relative to the skin, so that the collected electrical signal contains a lot of artifacts

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