Abstract
Background: 
 
 To know the prevalence of sensorineural hearing loss among chronic suppurative otitis media patients
 To study the correlation between duration and clinical findings of CSOM with the degree of hearing loss.
 
 Materials and Methods 
 Hospital based cross sectional study of patients aged between 10 to 45years with unilateral chronic suppurative otitis media attending Tirumala Super speciality Hospital, Kadapa from December 2015 to November 2017 with sample size of 100 cases were taken.
 Results: Out of the 100 cases, 10 patients were having sensorineural hearing loss. Thus the percentage is 10%. Out of the 10 cases of sensorineural hearing loss, no cases with sensorineural hearing loss between 10-15yr and 16-20yr age group. 2 were between in the age group of 26-30yr, 31-35yr and 36-40yr age group and 4 patients were in the age group of 41-45yr. Out of 100 patients 52 were males and 48 were females. Out of 10 patients with sensorineural hearing loss 6 were males and 4 were females. The duration of ear discharge ranged from 3 months to more than 15 years. Among the 100 patients studied 64 had ear discharge from 3months to 5yr. 16 had ear discharge from 6-10yr, 11 had ear discharge from 11-15yr and 9 had ear discharge of more than 15years.
 Conclusion: Our study shows presence of significant (10%) sensorineural hearing loss in patients with chronic suppurative otitis media.
 Duration of ear discharge correlates well with sensorineural hearing loss.
 No significant correlation between sex and sensorineural hearing loss.
 Keywords: Chronic suppurative otitis media, tubotympanic disease, sensorineural hearing loss.
Highlights
Chronic suppurative otitis media (CSOM) defined as a long-standing discharge either continuous or intermittent discharge through a non-intact tympanic membrane from either a perforation or a tympanostomy tube or it is an inflammatory process of the middle ear space for more than three months[1,2]CSOM can be classified on pathological bases into chronic suppurative otitis media tubotympanic type and chronic suppurative otitis media attico antral type
Among the 100 patients studied 64 had ear discharge from 3months to 5yr. 16 had ear discharge from 6-10yr, 11 had ear discharge from 11-15yr and 9 had ear discharge of more than 15years
Our study shows presence of significant (10%) sensorineural hearing loss in patients with chronic suppurative otitis media
Summary
Chronic suppurative otitis media (CSOM) defined as a long-standing discharge either continuous or intermittent discharge through a non-intact tympanic membrane from either a perforation or a tympanostomy tube or it is an inflammatory process of the middle ear space for more than three months[1,2]. Neglected acute suppurative otitis media of several months duration may still be essentially a self-limiting process that tends toward complete resolution, whereas epitympanic cholesteatoma from the very first day of otorrhea should be classified as CSOM. It is not the duration of the discharge in days, weeks or months but rather the particular pathologic changes that cause otitis media to be classed as chronic rather than acute & self-limiting[4]. The round window membrane changes from 1 day to 6 months after eustachean tube obstruction, revealed changes to be gradual and similar to that of mucoperiosteum These changes noted are suitable for the changes of permeability and suggested that round window membrane is very likely pathway from middle to inner ear
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