Stapes surgery in osteogenesis imperfecta: retrospective analysis of 34 operated ears

Abstract

Intraoperative findings of stapes surgery in 34 ears from 22 patients with genetically confirmed osteogenesis imperfecta (OI) are reported, as well as the audiometric results after the longest postoperative follow-up published to date. Twenty-nine out of 34 ears underwent primary stapes surgery and 5 ears revision surgery. Postoperative audiometric follow-up ranged from 6 months to 37 years. Stapes footplates were fixed in all ears. Additionally, footplates were thickened or fragile, stapes crura atrophic or fractured, and middle ear mucosae thickened or hypervascularized. Short-term postoperative audiometry revealed improved hearing and reduced air-bone gaps in 28/29 primary operated ears and in all revision cases. In the 22 ears with long-term postoperative follow-up (mean duration: 16 years), hearing gain was still significant at the latest audiometric evaluation. Independently of the patients being diagnosed with OI type I or IV and independently of the underlying OI genotype, beneficial results are obtained in the majority of OI patients undergoing primary or revision stapes surgery for reduction of conductive hearing loss components caused by stapes footplate fixation. Despite the progressive course of the concomitant sensorineural component, hearing gain remains beneficial over several decades.