A technique for concurrent procedure of mastoid obliteration and meatoplasty after canal wall down mastoidectomy

Abstract

To present a simple technique for concurrent procedure of mastoid obliteration and meatoplasty after canal wall down mastoidectomy, and to assess the efficacy and the surgical results of this technique. Retrospective clinical study of a consecutive series of procedures from 2004 to 2008. One hundred thirteen patients undergone canal wall down mastoidectomy with tympanoplasty and concurrent procedure of mastoid obliteration and meatoplasty that uses an anteriorly based musculoperiosteal flap and a horizontal skin incision on the concha were included. Preoperative diagnoses were classified into cholesteatoma, adhesive otitis media, and chronic suppurative otitis media. The mean duration of follow-up was 38 months, with a range of 12-75 months. We analyzed control of suppuration and creation of a dry mastoid cavity according to the Merchant's grading system for evaluation of the efficacy of this technique, and hearing outcome. We evaluated postoperative complications including development of recurrent or residual cholesteatomas and duration of the mastoid cavity achieving a complete healing. Seventy-two patients had cholesteatoma, whereas 27 patients had adhesive otitis media and 14 patients had chronic suppurative otitis media. Eighty-three percent of all patients, in 86% of patients with cholesteatoma, in 78% of patients with adhesive otitis media, and in 78% of patients with chronic suppurative otitis media were achieved a dry and self-cleaning mastoid and complete control of infection. Duration of the mastoid cavity achieving a dry and self-cleaning mastoid ranged from 4 weeks to 24 weeks and the mean time of the complete epithelialization was 11.1±4.6 weeks. The average ABGs were 32.4±13.8dB preoperatively and 23±13.2dB postoperatively. There were 5 patients with failure of control of infection postoperatively and 3 patients of recidivistic cholesteatoma. The efficacy of our technique to make a dry and healthy mastoid cavity after a canal wall down mastoidectomy is satisfactory, and the rate of complication is acceptably low. We believe that our technique could be a convenient method to prevent cavity problems after canal wall down mastoidectomy.