SURG-45. THE EFFECT OF STAPEDECTOMY IN POSTOPERATIVE OUTCOME OF SUPERIOR SEMICIRCULAR CANAL DEHISCENCE: A CASE SERIES OF 349 REPAIRS

Abstract

Abstract INTRODUCTION Superior Semicircular Canal Dehiscence (SSCD) is a pathology of the otic capsule, in which, a “third mobile window” is formed on the osseous labyrinth surrounding the superior semicircular canal. Otosclerosis, another otic capsule pathology, can occur concurrently, therefore obscuring the symptoms seen in patients with SSCD. It is currently unknown whether the surgical procedures to treat otosclerosis such as stapedectomy can affect symptom resolution in patients following SSCD repair. Objective: To examine the association between post-SSCD repair symptom resolution and history of stapedectomy. METHODS A single institution retrospective review was conducted to evaluate post-operative symptom resolution in patients undergoing SSCD repair from 2011-2021. 349 SSCD repairs performed in a cohort of 279 patients were included, and among those were 10 patients with a history of stapedectomy. A p-value < 0.05 was considered statistically significant. RESULTS A total of 349 surgical repairs were analyzed. The patient population was composed of 63% female and 37% male with patient ages’ ranging from 13-84 years. Patients were divided into two different cohorts based on their history of stapedectomy. We compared these cohorts looking at their post-SSCD repair symptom changes and found no statistically significant differences between patients with and without history of stapedectomy. We also compared pre- and post-operative symptoms amongst the 10 patients with a history of stapedectomy and found no statistically significant differences in symptom resolution post-SSCD repair. Post-operative symptoms analyzed included amplification (p = 0.2), aural fullness (p = 0.2), autophony (p = 0.8), disequilibrium/imbalance (p = 0.8), dizziness (p = 0.3), headache (p = 0.7), hearing loss (p = 1), hyperacusis (p = 1), tinnitus (p = 0.4), and vertigo (p = 0.3). CONCLUSIONS With respect to symptom resolution post-SSCD repair, there were no significant differences between patients with and without a history of stapedectomy. Hence, previous stapedectomy surgery should not be considered an adverse condition to SSCD repair, with similar rates of improvement after SSCD surgery.