Evaluation of Audiological Results and Cochleo-Vestibular Subclinical Injury After CO

Evaluation of the effectiveness and safety of CORetrospective clinical trial on 38 patients with the diagnosis of otosclerosis, who underwent COPostoperative ABG closure within 10 dB was obtained in 35 cases (92.1%), with a mean postoperative ABG of 4.4 dB and a mean air conduction improvement of 32.3 dB. No significant worsening of high frequency threshold was observed. Spontaneous nystagmus was found preoperatively in 5/38 patients (13.2%), 1 day after surgery in 13/38 patients (34.2%), 1 week after surgery in 12/38 patients (31.6%), and 1 month after surgery in 4/38 patients (10.5%). Positional nystagmus was found preoperatively in 12/38 patients (31.6%), 1 day after surgery in 25/38 patients (65.8%), 1 week after surgery in 22/38 patients (57.9%), and 1 month after surgery in 10/38 patients (26.3%). The occurrence of nystagmus did not always correlate with vestibular symptoms: after surgery, 10 patients (26.3%) experienced vertigo associated with dizziness, 8 patients (21.1%) suffered from dizziness without vertigo, and 14 patients (36.8%) showed nystagmus without any symptomatology. At 1 month after surgery none of the patients complained about vestibular symptoms.CO