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Objective Measures in Cochlear Implant

NCT03260374 · Status: UNKNOWN · Type: OBSERVATIONAL · Enrollment: 30

Last updated 2017-08-24

No results posted yet for this study

Summary

One of the main factors affecting the ability to maximize the full potential of a cochlear implant is an accurate map.The goal of mapping is to enable cochlear implant recipients to perceive a desired range of acoustic signals. The process includes programming of the minimum and the maximum stimulation levels that are based on subjective measurements of thresholds and the most comfortable level . The use of objective measures in the CI process has greatly contributed to the definition of the dynamic field, as they provide specific values that serve as the basis for the start of the mapping process, especially in cases of infants and young children. Some examples of these measures are electrically evoked stapedius reflex threshold , neural response telemetry , brainstem auditory evoked potential , and P300, among others.

Conditions

  • Sensorineural Hearing Loss

Interventions

DEVICE

Electric compound action potential

The electrically evoked compound action potentials, which are closely related to the electrically evoked brainstem responses, would also show a similar correlation with the behavioral threshold. Determining threshold levels requires subjective responses to a series of sophisticated psychophysical percepts. This is often difficult for cochlear implant patients. However, the neural response telemetry system renders possible the measurement of the compound action potential threshold .

DEVICE

electric stapedial reflex threshold

electric stapedial reflex threshold measurements are performed using the same software platform and electrical stimulus utilized for fitting the cochlear implant . Thus, stimulus parameters, including pulse duration and repetition rate, can be identical to those used to obtain behavioral judgments for psychophysical levels

DEVICE

electric auditory brain stem response

For most implant recipients , even the first introduction of electric stimulation from a cochlear implant evokes activity in the auditory brainstem , which can be measured as clear electric auditory brain stem response waveforms . Therefore the electric auditory brain stem response test can be used in the functional evaluation of the auditory system between the time of initial implant activation and after chronic cochlear implant use

Sponsors & Collaborators

  • Assiut University

    lead OTHER

Eligibility

Min Age
2 Years
Max Age
6 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2017-12-01
Primary Completion
2019-08-31
Completion
2019-12-30

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03260374 on ClinicalTrials.gov