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Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation
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Compensated Vestibular Dysfunction Post Cochlear Implantation in Children with Sensorineural Hearing Loss: A

Atul Gupta1, Poonam Raj2

  • 1Department of ENT and HNS, Base Hospital Delhi Cantt, New Delhi, 110010 India.

Indian Journal of Otolaryngology and Head and Neck Surgery : Official Publication of the Association of Otolaryngologists of India
|July 7, 2018
PubMed

Insights

Cochlear implantation in children may cause surgically induced vestibular dysfunction. This study found a 16.66% incidence of compensated vestibular dysfunction after surgery, highlighting the need for pre- and post-operative vestibular evaluation.

Area of Science:

  • Otolaryngology
  • Neuroscience
  • Pediatric Audiology

Background:

  • Cochlear implantation (CI) is a common treatment for sensorineural hearing loss in children.
  • Surgical instrumentation during CI carries a risk of inducing vestibular dysfunction.
  • Understanding this risk is crucial for informed patient consent and surgical planning.

Purpose of the Study:

  • To identify and quantify compensated vestibular dysfunction following cochlear implantation in pediatric patients.
  • To assess the incidence of surgically induced vestibular changes after CI.
  • To inform clinical practice regarding pre- and post-operative vestibular assessment.

Main Methods:

  • Vestibular function was evaluated using monothermal warm air caloric testing before and after cochlear implantation.
  • Nystagmus slow-phase velocity was recorded using a head-mounted camera and SYNAPSYS Ulmer VNG software.
  • Monothermal caloric asymmetry (MCA) exceeding 15% was defined as canal paresis, indicating vestibular dysfunction.

Main Results:

  • A statistically significant incidence of 16.66% for compensated vestibular dysfunction was observed post-CI (p=0.02).
  • The results indicated a worsening of canal paresis, consistent with vestibular dysfunction.
  • This suggests a notable risk of surgically induced vestibular impairment.

Conclusions:

  • Pediatric cochlear implantation is associated with a significant risk of developing compensated vestibular dysfunction.
  • Pre- and post-operative vestibular system evaluation is recommended for all children undergoing CI.
  • Careful consideration is advised before proceeding with bilateral cochlear implantation in a single surgical session.

Keywords:
CaloricCochlear implantsSensorineuralVestibular

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