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  • Title: Auditory neuropathy spectrum: the importance of adequate diagnosis.
    Author: Caldas FF, de Castro Silva IM, Teixeira MS, Deperon TM, Cardoso CC, Barreto MA, de Oliveira CA, Bahmad F.
    Journal: Int Tinnitus J; 2012; 17(2):194-9. PubMed ID: 24333894.
    Abstract:
    OBJECTIVE: To evaluate the prevalence of misdiagnosis of the hearing impaired children, in order to investigate the existence of Auditory Neuropathy Spectrum Disorder. METHODS: Analytical, prospective study conducted with 15 participants (30 ears) aged 10-12 years, with bilateral sensorineural hearing loss, attending a Hearing Rehabilitation Center, accompanied by a multidisciplinary team with otolaryngologist, audiologist, psychologist, teacher and social worker. The participants underwent ENT examination and audiological assessment: tympanometry, acoustic reflexes, otoacoustic emissions test and Auditory Evoked response. RESULTS: From the total sample (30 ears), 8 ears (26.7%) presented absent responses in the Auditory Evoked response with the presence of cochlear microphonism. Within the selected eight ears, six (75%) showed presence of otoacoustic emissions test in isolated frequencies and two (25%) ears had otoacoustic emissions test even in the presence of the isolated frequencies. It was found that 26.7% of the ears tested presented results that are compatible with Auditory Neuropathy Spectrum Disorder. CONCLUSION: The results of this study have identified characteristics related to ANSD in 26.7% of ears tested, 6 participants with age over 10 years old, showing that misdiagnosis in hearing loss patients is still very frequent.
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