Prebending-type artificial cochlear electrode

Abstract

The invention provides a prebending-type artificial cochlear electrode which comprises an electrode assembly and an inner core, wherein the electrode assembly is composed of an electrode collar and an electrode wire; the length of the electrode assembly is close to that of the inner core; the electrode assembly and the inner core are enclosed into an integral body through silica gel; the inner core is made of a memory alloy material; the shape of the inner core is preset to be identical to that of a human cochlea; and the inner core is arranged inside the electrode assembly. The invention caneffectively ensure the embedding directionality of the electrode; and the prebending-type artificial cochlear electrode is convenient to embed and manufacture, and has the advantage of low power consumption.

Description

Technical field [0001] The invention belongs to the field of biomedical engineering bionics, and relates to a cochlear artificial electrode, in particular to a pre-curved cochlear artificial electrode. Background technique [0002] The human ear can be divided into three parts: inner ear, middle ear and outer ear. During normal listening, sound waves pass through the external auditory canal and vibrate the tympanic membrane. Causes vibration of the tympanic membrane and ossicles in the middle ear. This vibration causes the fluid in the inner ear or cochlea to fluctuate, which causes thousands of tiny auditory nerve cells called inner hair cells to produce electrical signals. The signals are transmitted to the brain along the auditory nerves and converted into organic cells in the brain. Meaningful information. [0003] For patients with severe or very severe sensorineural hearing loss, the tiny inner hair cells in the cochlea are damaged. The reasons are either congenital, that ...

AI Technical Summary

Problems solved by technology

The bending angle and radian of the pre-bent electrode after mold processing are guaranteed by the mold, but the time interval between the pre-bend electrode being straightened and used in surgery is different. Due to the stress of silica gel and electrode wire bundles, After pulling out the supporting steel core, the angle and radian of the pre-bent electrodes returning to the bent state are also slightly different, which affects the distance between each electrode and the cochlear modiole

At the same time, for the convenience of processing, the pre-bent shape of the existing pre-bent electrode is actually a plane spiral shape, rather than the spiral shape of the cochlear shell itself. Therefore, when the electrode is inserted, due to the effect of torsion , the directionality of the electrode cannot be effectively guaranteed, so that the electrode cannot achieve the best working condition

Images