Surgical Efficacy of Mastoidectomy in Chronic Otitis Media: Squamosal Type

Abstract

Chronic Otitis Media-Squamosal type is an erosive process, which when confined to ossicular chain causes varying degrees of hearing impairment. As the disease progresses to involve surrounding vital structures, it causes various complications like facial palsy, vertigo, mastoid abscess, which are more common than the other intracranial complications, and require a definitive surgical intervention i.e., mastoidectomy at the earliest. A retrospective study on 60 patients who had been operated for squamosal type were analysed for the demographics, symptomatology, intraoperative extent of cholesteatoma, type of mastoidectomy done, various graft materials used for reconstruction, post operatively for graft uptake, hearing improvement and the results were analysed using ChOLE classification of cholesteatoma. Although Intact Canal Wall mastoidectomy had improved post op PTA values, there was no significant difference in the Air-Bone gap closure when Intact Canal Wall mastoidectomy was compared to Canal Wall Down Mastoidectomy.

Keywords: Canal wall down mastoidectomy; Cholesteatoma; Intact canal wall mastoidectomy; Squamosal.

Fig. 1

Showing graphical representation of hearing outcomes as measured by PTA (pure tone average) and ABG (air–bone gap)

Fig. 2

Showing hearing improvement as per “ChOLE” Staging. (X axis: staging; Y axis: Mean ABG)