Audiological screening in people with diabetes. First results
AbstractThe relationship between diabetes mellitus (DM) and hypoacusia has been discussed since the work of Jordao, in 1857. Type II diabetes was considered a prevalent age-related medical condition, resulting in subclinical pathological changes. It was estimated that the incidence is about 9.6% of people in USA. (Cowie et al. 2006). Some studies has shown that the magnitude of hearing loss in patients with DM is related to the duration of the disease, age, and affects the auditory threshold to high frequencies. (Frisina et al. 2006). In a study of Tay HL et al. (1995) was found that there is a possible correlation between the duration of diabetes and hearing loss. The auditory system requires glucose and high-energy utilization for its complex signal processing. This suggests that the cochlea may also be a target organ for the ill effects of hyperglycemias. (Cullen and Cinnamond, 1993). Increased glucose exposure, even for short periods, initiates a metabolic cascade that could disrupt the cochlea both anatomically and physiologically (Jorgensen, 1961). Hearing depends on small blood vessels and nerves of the inner ear that are affected by high blood sugar level in diabetic patients. Outer hair cells modulate auditory reception in the inner ear: consequently, OAEs are commonly considered a useful index of cochlear function...
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