title: Direct round window stimulation with the Med-El Vibrant Soundbridge: 5 years of experience using a technique without interposed fascia.
abstract: The objective of this study was to present 5 years of surgical experience, and the extended results of hearing preservation (based on 3-year follow-up), with the Med-El Vibrant Soundbridge (VSB) in which the floating mass transducer (FMT) is placed directly against the round window membrane, and the fascia is used only as covering tissue to keep it in position. A retrospective survey of surgical and audiological data was conducted to evaluate the performance and stability of patient hearing, with audiometric measurements performed over fixed time intervals up to 36 months. 21 patients, aged 19-62 years (mean 48.4), with mixed or conductive, bilateral or unilateral hearing loss were included in this study. Surgical intervention involved monaural implantation of the Med-El VSB between 2006 and 2009. The results were assessed using pure tone audiometry. In 5 years of experience with the technique, no significant complications or device extrusion were observed except for two revision surgeries requiring FMT repositioning. In the 3-year follow-up, we observed stable hearing in the implanted ear. It is concluded that direct round window stimulation without interposed fascia is an alternative for patients with hearing impairment caused by chronic otitis media and/or lack of ossicles, especially after modified radical mastoidectomy. It allows good results in a selected group of patients, although further observation on a larger population is needed to confirm long-term validity and effectiveness.
authors.affiliation: Institute of Physiology and Pathology of Hearing, ul Mochnackiego 10, 02-042, Warsaw, Poland, skarzynski.henryk@ifps.org.pl.
authors.forename: Henryk
authors.initials: H
authors.lastname: Skarzynski
authors.forename: Lukasz
authors.initials: L
authors.lastname: Olszewski
authors.forename: Piotr H
authors.initials: PH
authors.lastname: Skarzynski
authors.forename: Artur
authors.initials: A
authors.lastname: Lorens
authors.forename: Anna
authors.initials: A
authors.lastname: Piotrowska
authors.forename: Marek
authors.initials: M
authors.lastname: Porowski
authors.forename: Maciej
authors.initials: M
authors.lastname: Mrowka
authors.forename: Adam
authors.initials: A
authors.lastname: Pilka
mesh_terms: D000328:Adult; D001301:Audiometry, Pure-Tone; D002908:Chronic Disease; D003054:Cochlear Implants; D015331:Cohort Studies; D005260:Female; D006314:Hearing Loss, Conductive / Q000209:etiology / Q000601:surgery*; D046089:Hearing Loss, Mixed Conductive-Sensorineural / Q000209:etiology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010035:Otitis Media, Suppurative / Q000150:complications / Q000601:surgery*; D013506:Otologic Surgical Procedures / Q000379:methods*; D012189:Retrospective Studies; D012405:Round Window, Ear; D016896:Treatment Outcome; D055815:Young Adult