Sensorineural Hearing Loss in Patients with Chronic Suppurative Otitis Media

الملخص

introduction: The relationship between sensorineural hearing loss and Chronic Suppurative Otitis Media remains a controversial. damage of the cochlea and high-frequency sensorineural hearing loss was suggested to arise from passage of toxic substances and the drugs from the middle ear through the round window membrane into the inner ear.
Aim of study : To evaluate the incidence of sensorineural hearing loss in ears with chronic otitis media.
Method: This is prospective a study, consisted of 120 patients. They were 90 males and 30 females . they had been assessed at Otolaryngology department in Al-Diwania Teaching Hospital , in Al-Diwania city , Iraq, between January 2013 to December 2013, the age range from 10-60 years . inclusion criteria are as follows: unilateral continuous otorrhea through a perforated tympanic membrane for at least 3 months, normal tympanic membrane in the contralateral ear based on otoscopy. We do pure tone audiometry( PTA) for every Patient Exclusion criteria are history of head trauma or meningitis, previous tympanomastoid surgery, history of noise exposure ,systemic ototoxic drug therapy, family history of congenital or acquired sensorineural hearing loss, and post-traumatic tympanic membrane perforation. The control used was the contralateral ear with normal otoscopy.
Results: The mean bone conduction threshold in the diseased ear was 38.33 dB, and 10.1 dB in the control ear. The mean bone conduction threshold differences between the diseased and control ears range from 18.96 to 35.4dB across the frequencies 0.5,1.0, 2.0, and 4.0 kHz. These differences tended to increase with increasing frequency and were all significant (P < 0.05).
Conclusion: Patients with chronic suppurative otitis media had a significant degree of sensorineural hearing loss in this study. The higher frequencies were more affected