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PubMed · 6704059

Reverse frequency-sweep audiometry in patients with retrocochlear and cochlear deafness.

S Karjalainen·J Kärjä·M Sorri·A Palva
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Abstract

The material consisted of 21 patients with surgically confirmed eighth-nerve tumour and 107 patients with cochlear deafness. 13 (62%) of the patients with eighth-nerve tumour showed separated forward-backward tracings in sweep-frequency audiometry. One of the 13 patients gave an initially normal result but after the test ear had been exposed to 80 dB HL white noise for 3 min, the curves separated. Only 2 (1.9%) of the 107 patients with cochlear deafness had separated curves. Tone decay test revealed a pathological result in 67% of the patients with eighth-nerve tumour and in 26% of the cases with cochlear hearing loss. There is no single pathognomonic test for the diagnosis of retrocochlear and cochlear deafness. Diagnosis must be based on a whole battery of several tests, and among these, reverse frequency-sweep audiometry seems to be a suitable additional adaptation test. If an abnormal result is found in forward-backward sweep-frequency audiometry, a retrocochlear lesion is very probable.

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AudiometryAudiometry, Pure-ToneCranial Nerve NeoplasmsDeafnessDiagnosis, DifferentialHumansMaleMiddle AgedNoiseVestibulocochlear Nerve DiseasesJournal ArticleResearch Support, Non-U.S. Gov't

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S Karjalainen, J Kärjä, M Sorri, A Palva. 1984. Reverse frequency-sweep audiometry in patients with retrocochlear and cochlear deafness.. https://doi.org/10.3109/00206098409072821

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