Anti-retraction pre-bending electrode with plurality of concave notches and implantation method of anti-retraction pre-bending electrode

Abstract

The invention relates to the technical field of pre-bending electrodes, in particular to an anti-retraction pre-bending electrode with a plurality of concave notches and an implantation method of theanti-retraction pre-bending electrode. The anti-retraction pre-bending electrode comprises an electrode array, a pre-bending electrode internal signal transmission line, a guide wire and silica gel, wherein a silica gel body comprises a front section and a rear section; a guide wire passage is formed in the rear section; each of the front section and the rear section is in a circular arc shape; the curvature of the front section is smaller than the curvature of the adjacent rear section; a notch is formed between every two electrode contacts of the front section; and an anti-displacement device is arranged in a position, close to the tail end, of the rear section. The size and the rigidity of the front section can be reduced, so that the damage to a basilar membrane and tissues in the cochlea when the pre-bending electrode is implanted is reduced; cross stimulation of the electrode contacts onto the spiral ganglion cells is avoided; the rigidity of the front section is reduced; the flexibility of the pre-bending electrode is improved; residual audibility of a patient and the completeness of the electrode are effectively protected; the outward leakage of lymph in the cochlea in theoperation and the postoperative displacement are effectively prevented; and the success rate of an artificial cochlea implantation operation is increased.

Description

technical field [0001] The invention relates to the technical field of prebent electrodes, in particular to an anti-retraction prebend electrode with multiple notches and an implantation method thereof. Background technique [0002] There are generally two types of hearing loss: conductive hearing loss and sensorineural hearing loss. Among them, conductive hearing loss means that the way of external sound waves entering the inner ear is obstructed due to pathological factors of the ear sound transmission system. The ear sound transmission system includes the external auditory canal, tympanic membrane, ossicles, and cochlear window. Damage to any of these areas can lead to hearing loss. Conductive hearing loss can often be amplified by conventional hearing aids, allowing sound information to reach the cochlea and hair cells. But for sensorineural hearing loss, due to the loss or destruction of cochlear hair cells, the auditory signal cannot be converted into auditory nerve ...

AI Technical Summary

Problems solved by technology

[0005] 1. The traditional pre-bent electrode guide wire channel extends to the front of the electrode, which makes the front of the pre-bent electrode too rigid when implanted in the cochlea, which can easily cause damage to the basilar membrane and other tissues in the cochlea

[0006] 2. Straight electrodes close to the outer wall will cause pressure on the outer wall tissue, and precise stimulation cannot be achieved

However, the traditional pre-bent electrode will tightly hug the modiolus, but tightly hugging the modiolus will generate pressure on the bone wall and cause potential damage to the spiral ganglion; and as the implantation depth increases, there will be multiple electrodes cross-stimulating in the front part of the electrode Possibility of the same spiral ganglion cells to affect the stimulation effect of pre-bent electrodes

[0007] 3. Because the traditional pre-bent electrode has no device to prevent cochlear lymph fluid leakage and displacement, it is easy to cause lymph fluid leakage in the cochlea during the operation, and the pre-bend electrode array is prone to displacement after operation

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