Cochlear implant
Download
1 / 13

Cochlear Implant - PowerPoint PPT Presentation


  • 189 Views
  • Updated On :

Cochlear Implant. The Human Ear. SOURCE: http://www.infj.ulst.ac.uk/~pnic/HumanEar/Andy's%20Stuff/MScProject/workingcode_Local/humanear.jpg. Why another device???. Two types of hearing impairment or deafness:. Conductive hearing loss. Sensori-neural hearing loss. Hearing Loss.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Cochlear Implant' - tovah


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

The human ear l.jpg
The Human Ear

SOURCE: http://www.infj.ulst.ac.uk/~pnic/HumanEar/Andy's%20Stuff/MScProject/workingcode_Local/humanear.jpg


Why another device l.jpg
Why another device???

Two types of hearing impairment or deafness:

  • Conductive hearing loss

  • Sensori-neural hearing loss


Hearing loss l.jpg
Hearing Loss

  • Sensori-neural hearing loss

    • Loss of hair cells

    • Loss of nerve fibers


Statistics l.jpg
Statistics

  • BAD News:

  • ~ 28 million Americans have hearing impairment

    • 11 million are deaf

  • ~ 17 in 1,000 children under the age of 18

    • Incidents increase with age

  • ~ 3 in 1,000 children are born deaf

  • GOOD News:

  • ~ 23,000 people in the US use cochlear implants (about 0.2%)

  • ~ 59,000 people worldwide use cochlear implants

… and the numbers are growing!


Nucleus 24 cochlear implant system l.jpg
Nucleus® 24 Cochlear Implant System

BTE

Transmitting

Coil

Electrode

Array

Receiver-Stimulator

WSP


Nucleus 24 cochlear implant system7 l.jpg
Nucleus® 24 Cochlear Implant System


Sound speech processing l.jpg
Sound/Speech Processing

  • Continuously Interleaved Stimulation (CIS) Strategy

  • Sound waves >>> Band-pass filters

  • Output waveforms >>> electric stimuli

  • Train of stimuli are continuously passed without overlapping.


Materials manufacturing l.jpg
Materials & Manufacturing

  • BTE: Polyethylene polymer, Injection molded

  • Receiver-stimulator implant: Titanium shell, Deep drawn, curved to shape

  • Electrodes: Nitinol and Platinum or Equivalent, Coated with silicone

  • Every implant is manual assembled under a microscope


Clinical trials nucleus cochlear implant system l.jpg
Clinical Trials: Nucleus® Cochlear Implant System

  • Class III device (FDA)

  • 1982: First Clinical trial in Australia

    • 24 out of 37 subjects had significant improvement in perceiving unfamiliar speech (P < 0.001)

  • FDA approval for full commercial release in 1985

  • Currently, 40,000 patients WW have Nucleus® Cochlear implant system.


Areas of future research l.jpg
Areas of Future Research

  • Increasing electrode sensitivity >>> Materials, manufacturing processes, & integration

  • Single-electrode vs Multi-electrode, Multi-channel implants

  • Piezoelectric transducers

  • MRI compatibility >>> Eliminate magnets


Conclusions l.jpg
Conclusions

  • Boon to the deaf community

  • Very effective in treating sensori-neural deafness

  • Moderately expensive



ad