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Related Experiment Videos

Facial nerve stimulation after cochlear implantation.

Jennifer L Smullen1, Marek Polak, Annelle V Hodges

  • 1University of Miami Ear Institute, Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida 33101, USA.

The Laryngoscope
|June 4, 2005
PubMed
Summary

Facial nerve stimulation (FNS) occurred in 6.5% of cochlear implant (CI) patients. Perimodiolar electrodes in Nucleus devices caused FNS at higher loudness levels, making them preferable for at-risk patients.

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Area of Science:

  • Otorhinolaryngology
  • Biomedical Engineering
  • Neurosurgery

Background:

  • Facial nerve stimulation (FNS) is a potential complication of cochlear implant (CI) surgery.
  • Understanding the incidence and characteristics of FNS across different CI manufacturers is crucial for patient management.

Purpose of the Study:

  • To compare the incidence and nature of FNS in patients receiving CIs from Cochlear Corporation, Advanced Bionics Corporation, and MedEl.
  • To evaluate the impact of electrode type (straight vs. perimodiolar) on FNS in Nucleus devices.

Main Methods:

  • Retrospective chart review of 600 patients with CIs and at least one year of follow-up.
  • Data collection included device type, electrode configuration, and FNS occurrence, onset, and loudness levels.
  • Comparison of FNS incidence between different CI manufacturers and between Nucleus straight and perimodiolar electrodes.

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Main Results:

  • The overall incidence of FNS was 6.5% (39/600 patients), with similar rates across manufacturers (MedEl 7.0%, Nucleus 6.6%, Clarion 6.0%).
  • Nucleus perimodiolar electrodes showed no significant difference in FNS incidence compared to straight electrodes.
  • Straight electrodes elicited FNS at significantly lower perceived loudness levels than perimodiolar electrodes (P < .0001).

Conclusions:

  • The overall incidence of FNS in cochlear implant patients is consistent with prior research.
  • All evaluated CI devices demonstrated similar FNS incidence.
  • Perimodiolar electrodes are preferable for Nucleus device recipients at risk for FNS due to higher stimulation thresholds.