Tympanic membrane perforation`s site affect the degree of hearing difficulty

الملخص EN

Background:The effect of the site of perforation of tympanic membrane and amplitude of hearing difficulty is discussed in many authors with different results we try to estimate these relationships in our study.Method:A cross sectional analytic study off 55 patients with chronic suppurative otitis media.The tympanic membrane was divided into four segments according to the relation of each to handle of malleus, antero-superior, antero-inferior, postero-superior and postero-inferior.Hearing level of each patient was assessed in decibel with audiometer at frequencies from 250Hz to 8kHz in acoustically treated sound proof room.Results: in our study we found that the highest incidence of csom at age group (15-34) year and highest number and percentage of perforation were in anter-inferior segment of tympanic membrane (34),(66.6%) followed by postero-superior segment (7),(13.7%) then postero inferior (6),(11.7%) and antero-superior one (4),(7.8%).No significant sex difference.The conclusion was the clear effect of the site of perforation in relation to degree of hearing difficulty.