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Nucleus 22-channel cochlear implant: preliminary observations.

M S Hirshorn, D J Mecklenburg, J A Brimacombe

    Journal of Rehabilitation Research and Development
    |April 1, 1986
    PubMed
    Summary

    The Nucleus 22-channel cochlear implant significantly improved speech understanding in postlingually deafened adults. Patients showed better auditory and lip-reading skills, supporting advanced cochlear implant technology.

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    Scope and design of the clinical trial of the Nucleus multichannel cochlear implant in children.

    Ear and hearing·1991
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    Perceptual abilities of children with the Nucleus 22-channel cochlear implant.

    Ear and hearing·1991
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    Consonant production in children receiving a multichannel cochlear implant.

    Ear and hearing·1991
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    Performance of postlinguistically deaf adults with the Wearable Speech Processor (WSP III) and Mini Speech Processor (MSP) of the Nucleus Multi-Electrode Cochlear Implant.

    Ear and hearing·1991
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    Cochlear implantation in child.

    Revue de laryngologie - otologie - rhinologie·1991
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    Pediatric performance with the Nucleus 22-channel cochlear implant system.

    The American journal of otology·1991

    Area of Science:

    • Audiology
    • Biomedical Engineering
    • Neurosurgery

    Background:

    • Profound-totally deaf adults with postlingual hearing impairment often have limited communication abilities.
    • Cochlear implants offer a potential solution for restoring auditory function.
    • The Nucleus 22-channel cochlear implant utilizes a feature extraction coding system.

    Purpose of the Study:

    • To evaluate the performance of postlingually deafened adults using the Nucleus 22-channel cochlear implant.
    • To assess improvements in speech recognition with and without lipreading.
    • To determine the efficacy of the feature extraction coding system.

    Main Methods:

    • A single-subject study design was employed, with each patient serving as their own control.
    • Thirty-seven adult subjects with postlingual profound-totally deaf impairment participated.

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  • Standardized preoperative evaluations, prosthesis fitting, training, and postoperative testing were conducted across clinics.
  • The Minimal Auditory Capabilities (MAC) Battery was used to assess speech understanding.

    • Main Results:

    • 16 to 24 out of 37 subjects demonstrated statistically significant improvement (P <= 0.001) in recognizing unpracticed, unfamiliar recorded speech without lipreading.
    • Nearly all patients showed enhanced speech recognition when utilizing lipreading in conjunction with the implant.
    • The results indicate substantial gains in auditory perception and communication abilities.

    Conclusions:

    • The Nucleus 22-channel cochlear implant is effective in improving speech understanding for postlingually deafened adults.
    • The feature extraction coding system, transmitting formant and amplitude information via electrical stimulation, is supported by these findings.
    • Cochlear implantation offers a viable option for restoring functional hearing in this patient population.