Abstract
To evaluate the hearing outcome in canal wall down mastoidectomy with middle ear reconstruction, prospective longitudinal study was done at National Institute of ENT, Dhaka from March 2015 to September 2016. Total 22 patients were included in the study undergoing canal wall down mastoidectomy with 6 months postoperative followup. Hearing outcomes were observed and compared with the preoperative hearing tests. Among the 22 patients 9 (39.1% of subjects) patients had hearing gain, 12 (52.2%) had hearing loss and 1 (4.3%) had no change in hearing postoperatively.Although disease clearance is the main objective in canal wall down mastoidectomy, hearing gain can be achieved if combined with ossiculoplasty and tympanoplasty. The hearing gain or loss depends upon the extension of disease and status of the ossicular chain. Most patients usually experience hearing loss more than the preoperative period due to removal of ossicle or ossicles for the sake of disease clearance.
 Bangladesh J Otorhinolaryngol; October 2017; 23(2): 195-198
Highlights
Patients with canal wall down mastoidectomy had little to no hope of hearing reconstruction previously
Augmentation ossiculoplasty entails increasing the height of the stapesabove the fallopian canal when a canal wall down mastoidectomy is performed and the malleus is absent
Study Subject: Patients with squamosal chronic otitis media, undergoing canal wall down mastoidectomy with tympanoplasty, who came for regular follow- up were included in this study
Summary
Patients with canal wall down mastoidectomy had little to no hope of hearing reconstruction previously. Primary aim in surgical treatment is to remove the disease and render the ear safe, and second in priority is to preserve or reconstruct hearing but never at the cost of the primary aim. It gives dry ear and permits easy reconstruction of hearing mechanism. Augmentation ossiculoplasty entails increasing the height of the stapesabove the fallopian canal when a canal wall down mastoidectomy is performed and the malleus is absent. This technique frequently uses the body of the incus, thehead of the malleus, a cortical bone graft or a cartilage i.e,conchal or septal cartilage. Aim of study To evaluate the hearing outcome in canal wall down mastoidectomy with middle ear reconstruction
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