Impaired fixation suppression is a risk factor for vertigo after cochlear implantation

Abstract

Pre-operative impaired visual fixation suppression is a major risk factor for the occurrence of vertigo after cochlear implantation.

Influence of cochlear implantation on peripheral vestibular receptor function

“…Central vestibular compensatory mechanisms may suppress peripheral vestibular dysfunctions. In CI patients with conserved ability of visual fixation suppression, vertigo symptoms were found significantly less often 17 . The poor correlation between the patients' subjective complaints and the objectively measurable changes in neurotologic tests may be explained by the wide array of possible causes of balance disorders after CI.…”

“…In CI patients with conserved ability of visual fixation suppression, vertigo symptoms were found significantly less often. 17 The poor correlation between the patients' subjective complaints and the objectively measurable changes in neurotologic tests may be explained by the wide array of possible causes of balance disorders after CI. Benign paroxysmal positioning vertigo, Tullio phenomenon, electric stimulation, or psychosomatic causes cannot be quantified by caloric testing, rotatory chair testing, or VEMP testing.…”

Meta‐analysis of subjective complaints of vertigo and vestibular tests after cochlear implantation

“…Patients of studies undergoing the RW approach do not have significantly increased vertigo after cochlear implantation, in contrast to studies including patients undergoing cochleostomy. Postoperative vertigo (new onset and perioperatively unchanged vertigo) occurred in 8.8% (532 of 6,120 patients) after cochleostomy and in 5.5% (48 of 868) after RW approach . Patients undergoing RW approach have a significantly lower risk of postoperative vertigo compared with cochleostomy (OR of 0.61; 95% CI 0.45–0.83; P = 0.05).…”

Impact of cochlear implantation on the function of the three semicircular canals

“…This timing of postoperative assessment varies between studies and could influence test results (Abouzayd et al 2017), although the present study showed that in general the length of the postoperative follow up interval was not correlated with any vestibular outcome. The evolution of vestibular symptoms over time may indicate a central compensatory effect (Kubo et al 2001;Buchman et al 2004;Filipo et al 2006;Krause et al 2009). The present findings of a clinically non-significant effect on DHI score might therefore possibly be influenced by the time of assessment.…”