Objective: To assess balance function in patients with radiologically confirmed otosclerosis.
Methods: Sixteen patients (female 14, male 2) who attended the Neuro-Otology clinic/ENT clinics at the Royal National Throat Nose and Ear Hospital participated in this study. After general medical, audiological and Neuro-Otological examination, patients underwent the caloric and rotational testing.
Results: Thirteen of the 16 patients had radiologically confirmed otosclerosis (12 Females, 1 male). A total of 3 patients (female 2, male 1) did not have CT confirmation of otosclerosis and therefore were excluded from the study. Therefore, the remaining 13 patients’ data were analyzed. Nine patients had a mixed hearing impairment at least on one side, while eight patients had a bilateral mixed hearing loss and one patient had a sensorineural hearing loss on the opposite side. Four patients had a bilateral sensorineural hearing loss. Only one patient had a canal paresis (CP) at 35 %. None of the patients had any significant directional preponderance (DP). The patient with significant CP (35%) didn’t show any rotational asymmetry on impulsive rotation. Eleven patients had a rotational chair test. Only one patient had a significant asymmetry to the right at 25.30% (Normal range is <20%). Overall, 18% (n = 2) of the radiologically confirmed otosclerosis patients showed an abnormal balance test including both caloric and rotational tests. More than 80% (n = 9) of the patients with radiological otosclerosis showed balance symptoms.
Conclusions: The current study indicates a high prevalence of balance symptoms (n =9, 82%) in patients with radiological otosclerosis, although only a small proportion (n = 2, 18%) showed an abnormal vestibular function on caloric and impulse rotation testing. However, due to a small number of samples, further validation of this result is warranted.
Keywords: Balance; Otosclerosis;canal paresis; vestibular function; hearing impairment