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Related Experiment Videos

Clinical trials with a 22-channel cochlear prosthesis.

N L Cohen, S B Waltzman, W H Shapiro

    The Laryngoscope
    |December 1, 1985
    PubMed
    Summary

    Six patients received a 22-channel cochlear implant, demonstrating hearing restoration and improved speech understanding. The device enabled environmental sound recognition and aided speech communication, even allowing limited conversation without lipreading.

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    Area of Science:

    • Audiology
    • Biomedical Engineering
    • Neurosurgery

    Background:

    • Cochlear implants offer a potential solution for severe to profound hearing loss.
    • Advancements in cochlear prosthesis technology aim to improve speech perception and sound awareness.

    Purpose of the Study:

    • To evaluate the efficacy of a 22-channel cochlear prosthesis with a programmable speech processor.
    • To assess hearing sensation restoration, speech detection, and recognition abilities in implanted patients.

    Main Methods:

    • Implantation of six patients with a 22-channel cochlear prosthesis featuring a wearable speech processor.
    • Adherence to a strict clinical protocol with regular follow-up.
    • Audiological assessments including pure tone averages, speech detection thresholds, and speech recognition tests.

    Main Results:

    • All patients experienced hearing sensation restoration and regular device use.
    • Pure tone averages ranged from 20–47 dB HL; speech detection thresholds ranged from 15–32.5 dB HL.
    • Patients recognized environmental sounds and showed improved speech recognition with lipreading; some achieved limited unaided conversation.

    Conclusions:

    • The 22-channel cochlear prosthesis effectively restores hearing sensation and enhances speech understanding.
    • The device facilitates environmental sound awareness and improves communication abilities, including limited unaided conversation.
    • This technology represents a significant advancement in auditory rehabilitation for individuals with hearing loss.

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