Objectives: The aim of the present study was to investigate saccular function in patients with otosclerosis. Furthermore, the influence of stapedotomy on the vestibular-evoked myogenic potentials (VEMPs) should be demonstrated.
Study Design: Prospective study.
Setting: Tertiary referral center.
Methods: Bone-conducted tone-burst-evoked VEMPs were measured in 23 patients (25 ears) with unilateral or bilateral otosclerosis preoperatively and postoperatively.
Results: Preoperatively, VEMPs could be recorded in 11 ears (44%). There was no statistically significant correlation among the extent of preoperative sensorineural hearing loss, age, and VEMP measurements. Postoperatively, VEMPs were found in 14 ears (56%). In three cases (12%), VEMPs reappeared after surgery. The rare cases of preoperative vertigo could not be correlated to the nonappearance of VEMPs.
Conclusion: Stapedotomy surgery does not influence VEMPs, implying that the saccular receptors are not injured by surgery. Moreover, in some cases, the elicitability of VEMPs was improved by stapedotomy surgery. Seemingly, otosclerosis can influence the generation of VEMPs most probably due to an involvement of the otolith organ's saccular receptors. No correlation was found between the clinical occurrence of vertigo and the elicitability of VEMPs.
Department of Otolaryngology at Unfallkrankenhaus Berlin, Hospital of the University of Berlin, Charité Medical School, Berlin, Germany
Address correspondence and reprint requests to Ingo Todt, Department of Otolaryngology at UKB, Hospital of the University of Berlin, Charité Medical School, Warenerstrasse 7, D-12683 Berlin, Germany; E-mail: Ingo.Todt@ukb.de
This study was supported by a grant from the Sonnenfeld Foundation (Berlin, Germany).