Implantable neural electrode based on carbon nanotube line

Abstract

The invention discloses an implantable neural electrode based on a carbon nanotube line, and relates to the field of medical equipment. The implantable neural electrode comprises an exposed part and an insulation part, wherein the exposed part and the insulation part are from the same carbon nanotube line electrode, the carbon nanotube line electrode of the exposed part is directly exposed, and the carbon nanotube line electrode of the insulation part is wrapped by an insulation layer; the exposed part is used for recording electroneurographic signals or conducting electrostimulation on nervous tissue. The disclosed neural electrode is small in size, has a flexible structure and makes close contact with neurons, which can reduce mechanical damages to the nervous tissue and contribute to achieving long-term and stable implantation in vivo. The carbon nanotube material used by the neural electrode has the advantage of being high in charge injection capacity. Not only can the neural electrode using the carbon nanotube line of small size record the electroneurographic signals with a high signal-to-noise ratio, but it can conduct partial neural electrostimulation, improving spatial selectivity of the neural electrode electrostimulation.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an implanted nerve electrode based on carbon nanotube wires. Background technique [0002] As a physical channel between the biological nervous system and artificial electronic devices, the performance of implantable nerve electrodes directly determines the long-term reliability of the acquisition of biological nerve electrical signals and nerve electrical stimulation. The design considerations of neural electrodes mainly include the biocompatibility and biosafety of materials, the mechanical and electrochemical stability of electrodes, and the repeatability of manufacturing processes. [0003] Traditional implantable nerve electrodes for peripheral and central nervous tissue mostly use polymers, platinum, iridium or silicon materials. Although the functions of electrodes can already be realized, it is difficult to achieve high biocompatibility, flexibility (that is, low mechanical...

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Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that it is difficult for the existing nerve electrodes to have high biocompatibility, low mechanical damage, high signal-to-noise ratio and high charge injection ability at the same time, and cannot achieve long-term effective The problem of collecting and outputting bioelectrical signals

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