title: The role of subtotal petrosectomy in cochlear implantation.
abstract: BACKGROUND
  Subtotal petrosectomy combined with cochlear implantation is a procedure required in specific situations.
  
  
  METHODS
  A retrospective review of all cases of subtotal petrosectomy in cochlear implant surgery over a five-year period was performed. The indications, complications and outcomes for this procedure are outlined.
  
  
  RESULTS
  Sixteen patients underwent cochlear implantation in combination with subtotal petrosectomy and blind sac closure of the external auditory meatus from 2008 to 2013. Seventy-five per cent of these were completed as a two-stage procedure and 25 per cent as a single-stage procedure. The most common indications for the procedure were chronic otitis media, previous radical cavity, and for surgical access in challenging anatomy or in drill-out procedures. Mastoids were obliterated with fat or musculoperiosteal flaps. The complication rate relating to blind sac closure was 6 per cent. Cochlear implants were successfully placed in all cases and there was no incidence of device failure.
  
  
  CONCLUSIONS
  For patients with chronic suppurative otitis media or existing mastoid cavities, subtotal petrosectomy with blind sac closure of the external auditory canal, closure of the eustachian tube, and cavity obliteration is an effective technique to facilitate safe cochlear implantation.
authors.affiliation: Department of Otolaryngology - Head Neck and Skull Base Surgery,Sir Charles Gairdner Hospital,Perth,Australia.
authors.forename: P
authors.initials: P
authors.lastname: Casserly
authors.affiliation: Department of Otolaryngology - Head Neck and Skull Base Surgery,Sir Charles Gairdner Hospital,Perth,Australia.
authors.forename: P L
authors.initials: PL
authors.lastname: Friedland
authors.affiliation: Department of Otolaryngology - Head Neck and Skull Base Surgery,Sir Charles Gairdner Hospital,Perth,Australia.
authors.forename: M D
authors.initials: MD
authors.lastname: Atlas
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019929:Cochlear Implantation / Q000009:adverse effects / Q000379:methods*; D003638:Deafness / Q000150:complications / Q000601:surgery; D004427:Ear Diseases / Q000150:complications / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000009:adverse effects / Q000379:methods; D010579:Petrous Bone / Q000601:surgery*; D012189:Retrospective Studies; D055815:Young Adult
keywords: Cholesteatoma; Cochlear Implants; Mastoid; Meningitis; Otitis Media; Tympanic Membrane Perforation