Pre- and Post-operative Speech Audiometry Evaluation in Patients with Chronic Otitis Media

OBJECTIVES: The primary function of the human auditory system is to ensure proper speech comprehension. Speech audiometry enables the assessment of the conductive and the sensory aspects of the ears, providing some insight into the central auditory processing function. MATERIALS and METHODS: We conducted an analysis of 79 patients with chronic otitis media (COM) undergoing surgery at the Department of Otolaryngology, Jagiellonian University Medical College, in Krakow between 2005 and 2014. Tonal audiometry and speech audiometry were used as part of the hearing assessment. The pre-operative and long-term post-operative findings were compared, focusing mainly on speech audiometry. RESULTS: At the end of the mean 10-year follow-up, a significant percentage worsening in speech comprehension from the baseline was demonstiated in group III (hearing loss > 70 dB(decibels)), as compared with the remaining groups. There was a significant (p=0.017) difference in speech comprehension between the treated and contralateral ears, with the mean maximum speech comprehension rates of 80% in the treated ear versus 92% in the contralateral ear. CONCLUSION: We demonstrated a correlation between the findings of tonal audiometry and speech audiometry. The severe damage caused by chronic middle ear diseases not only leads to conductive hearing loss but also acts as a significant contributor to poor speech comprehension in a long-term follow-up. The speech comprehension in a healthy ear is significantly better than in a diseased ear. Middle ear reconstructive surgery offers the maximum improvement in speech comprehension at the hearing loss of 41 to 70 dB in speech audiometry.