Relationship between NRT measurements and behavioral levels in children with the Nucleus 24 cochlear implant may change over time: preliminary report

Objective: Response from spiral ganglion cells to electrical stimulation via the Nucleus 24 cochlear implant can be measured using the neural response telemetry system. The purpose of this study was to assess, in children, the correlation between the neural response threshold and the behavioral leve...

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Veröffentlicht in:International journal of pediatric otorhinolaryngology Jg. 58; H. 2; S. 153 - 162
Hauptverfasser: Thai-Van, Hung, Chanal, Jean-Marc, Coudert, Chrystelle, Veuillet, Evelyne, Truy, Eric, Collet, Lionel
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Amsterdam Elsevier Ireland Ltd 27.04.2001
Elsevier
Schlagworte:
Action Potentials
Auditory perception
Biological and medical sciences
Child
Child Behavior
Child, Preschool
Cochlear implant programming process
Cochlear Implantation
Cochlear Implants
Congenital deafness
Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology
Electric Stimulation
Electrical compound action potential
Electrodes
Female
Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics
Humans
Infant
Male
Medical sciences
Neural response telemetry
Non tumoral diseases
Otorhinolaryngology. Stomatology
Sensory Thresholds
Spiral Ganglion - physiology
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgery of the ear, the auditive nerve and the facial nerve
Telemetry
Congenital deafness
Cochlear implant programming process
Electrical compound action potential
Neural response telemetry
Auditory perception
Human
Range finding
Internal ear disease
Auditory disorder
Exploration
Duration
Electrodes
Surgical implantation
Surgery
Cochlea
ENT disease
Perception hearing loss
Localization
Child
Sensory hearing loss
ISSN:0165-5876, 1872-8464
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Zusammenfassung:Objective: Response from spiral ganglion cells to electrical stimulation via the Nucleus 24 cochlear implant can be measured using the neural response telemetry system. The purpose of this study was to assess, in children, the correlation between the neural response threshold and the behavioral levels used for cochlear implant programming process. Methods: The neural response telemetry test was administered to 23 children (mean age at implantation: 4 years) with the Nucleus 24 cochlear implant. Four intra-cochlear electrodes (electrodes 5, 10, 15 and 20) were tested. The neural response threshold at 3, 6, 9 and 12 months post-implantation was compared with the behavioral threshold and the maximum comfort level estimated during the same periods: a Pearson's correlation test was performed for each tested electrode. Results: On apical electrodes, the correlation with the behavioral threshold remained significant from 3 to 12 months post-implantation ( r ranging from 0.696 to 0.909, P<0.05), and the correlation with the maximum comfort level was also significant throughout the study period, except on electrode 15 at 9 months (tendency to significance). On basal and intermediate electrodes, statistical correlations were found only at some points of time; nonetheless, at 12 months post-implantation, a significant correlation with behavioral levels could be clearly demonstrated both on electrode 15 ( r=0.914–0.778, P<0.05) and on electrode 10 ( r=0.845–0.720, P<0.05). Conclusions: This preliminary study suggests that the correlation between the neural response threshold and behavioral levels may improve from the base towards the apex of the cochlea. However, a significant correlation can be demonstrated for all tested electrodes at 12 months post-implantation. During the first months post-implantation care must be exercised when interpreting neural response telemetry measurements: a positive test does not necessarily mean that the stimulus delivered to the acoustic nerve will be centrally processed with the result of an auditory perception.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0165-5876
1872-8464
DOI:10.1016/S0165-5876(01)00426-8