Multichannel cochlear implant and electrically evoked auditory brainstem responses in a child with labyrinthitis ossificans

P. R. Lambert, R. A. Ruth, A. V. Hodges

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Ossification of the cochlea following meningitis presents a surgical challenge. Electrode mapping, especially in the young child, is difficult given the uncertainty of electrode contact with viable neural elements. This paper reviews surgical technique and the use of auditory brainstem responses to map the electrodes. A 4-year-old child deafened by meningitis at age 20 months had bilateral cochlear ossification by computed tomography. At surgery, a canal wall-down mastoidectomy and closure of the ear canal were performed. A trough around the modiolus was drilled, and the electrode array was placed in it. Postoperatively, the patient gave aversive or no responses to electrode stimulation. To assess electrode function, auditory brainstem responses to individual electrode activation were obtained under general anesthesia. Functioning electrodes could thus be selected for mapping. The patient now responds well to sound.

Original languageEnglish
Pages (from-to)14-19
Number of pages6
JournalLaryngoscope
Volume101
Issue number1 I
StatePublished - Jan 1 1991

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Labyrinthitis
Cochlear Implants
Brain Stem Auditory Evoked Potentials
Electrodes
Cochlea
Meningitis
Osteogenesis
Ear Canal
General Anesthesia
Uncertainty
Tomography

ASJC Scopus subject areas

  • Otorhinolaryngology

Cite this

Multichannel cochlear implant and electrically evoked auditory brainstem responses in a child with labyrinthitis ossificans. / Lambert, P. R.; Ruth, R. A.; Hodges, A. V.

In: Laryngoscope, Vol. 101, No. 1 I, 01.01.1991, p. 14-19.

Research output: Contribution to journalArticle

Lambert, P. R. ; Ruth, R. A. ; Hodges, A. V. / Multichannel cochlear implant and electrically evoked auditory brainstem responses in a child with labyrinthitis ossificans. In: Laryngoscope. 1991 ; Vol. 101, No. 1 I. pp. 14-19.
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