Full-implanting type artificial cochlea and method for making same

A cochlear implant and implantable technology, applied in the field of bionics in biomedical engineering, can solve the problem of not hindering the appearance of the implanted person, and achieve the effect of simplifying the device

Inactive Publication Date: 2007-12-05
EYE & ENT HOSPITAL SHANGHAI MEDICAL SCHOOL FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this device significantly increases technical problems and difficulties during surgery, it does not hinder the appearance of the recipient at all, and is beneficial to the ph

Method used

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  • Full-implanting type artificial cochlea and method for making same
  • Full-implanting type artificial cochlea and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 In Vitro Test of Piezoelectric Implantable Microphone

[0049] 1. Experimental instrument XD7 low-frequency signal generator, newly built SS1-A 20MHz oscilloscope, Aijielun 56422A100MHz oscilloscope, WYJ-30V / 2A transistor DC stabilized power supply, ear microsurgery equipment and microscope. All experiments are carried out in a quiet soundproof room (environmental noise is less than 20 db SPL).

[0050] 2. Using piezoelectric ceramics as raw materials, titanium alloy as the carrier, and insulating glue on the outside to prepare piezoelectric implantable microphones. The finished product is 6mm in length, 2mm in width, 0.2mm in thickness, and 20mg in mass. One end of the carrier is in the shape of a T-shaped metal arm for fixing. The output terminal is connected to a miniature signal amplifier. Microphone working current: 0.18mA.

[0051] 3. In vitro vibration model experiment. The speaker is used as the source of sound wave vibration outside the body. The implanta...

Embodiment 2

[0060] Example 2 In vivo (animal) experiment of piezoelectric implantable microphone

[0061] 1. Experimental instruments: XD7 low-frequency signal generator, newly built SS1-A 20MHz oscilloscope, Aijielun 56422A100MHz oscilloscope, WYJ-30V / 2A transistor DC power supply, ear microsurgery equipment and microscope. All experiments are carried out in a quiet and soundproof room, and the environmental noise is less than 20 db SPL.

[0062] 2. Experimental animals: 6 adult cats (3 male and female), purchased from Fengxian Animal Farm, weighing 2.5-3kg, and raised in a clean animal room.

[0063] 3. Method

[0064] Acute animal experiment: (1) Fix the implantable microphone to the malleus head of the cat by surgery, input a 100Hz-8000Hz double frequency, 97db SPL pure tone signal in front of the tympanic membrane, and record the output signal voltage amplitude (peak-to-peak value). This results in sensitivity and frequency response. A total of 8 ears were tested and the average value wa...

Embodiment 3

[0070] Example 3 Compensation of microphone signal into microphone signal experiment

[0071] 1. Use SystemView software to simulate and prove that the signal through the microphone can be adjusted to be the same as the signal from the microphone.

[0072] 2. The voice signal is distorted through an irregular filter to imitate the distorted voice signal after the signal passes through the microphone.

[0073] 3. Design a filter to restore the original signal after the distorted voice signal passes through.

[0074] The results show that the changed signal after passing through the microphone is similar to the original voice signal after being restored by the filter.

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Abstract

The present invention relates to biomedicine engineering and bionics, and is especially one new type of implanted artificial cochlea and its making process. The implanted artificial cochlea consists of one implanted piezoelectric or fiber type microphone, one signal amplifier, one phonetic processor and one decoding stimulator. It has optimized MSPR mixed coding mode and multiple stimulating modes. Experiment shows that the implanted artificial cochlea has high sensitivity and good frequency characteristic, and is suitable for sufferer, especially children sufferer, of deafness.

Description

Technical field [0001] The invention belongs to the field of biomedical engineering bionics, and relates to a new type of totally implantable cochlear and a preparation method thereof. Background technique [0002] Deafness is a common symptom of ear diseases, and various types of deafness account for about 30% to 40% of outpatients in otolaryngology. With the continuous enhancement of audiology and the rapid development of ear microsurgery, a considerable number of deaf patients have received effective treatment. Most patients with conductive deafness can improve their hearing through surgery; most sensorineural hearing loss currently lacks targeted and effective treatment, but patients with mild to moderate deafness can still use hearing aids to improve hearing and improve communication skills ; For patients with extremely severe and total deafness in both ears, the use of implantable hearing aids (cochlear implants) is the only option to improve their hearing. [0003] Cochlea...

Claims

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Application Information

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IPC IPC(8): A61F11/04A61F2/18H04R31/00
Inventor 迟放鲁江晔范宝华王正敏
Owner EYE & ENT HOSPITAL SHANGHAI MEDICAL SCHOOL FUDAN UNIV
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