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Low-powered ultrasound in the treatment of tinnitus: a pilot study
Carrick DG, Davies WM, Fielder CP, Bihari J
British Journal of Audiology 1986 May;20(2):153-155
clinical trial
6/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: No; Blind subjects: Yes; Blind therapists: Yes; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

The aim of this study was to determine whether a low dose of ultrasound, applied over the mastoid bone, caused a subjective improvement in the level of tinnitus in long standing tinnitus sufferers. Forty patients from the Swansea Tinnitus Association volunteered to take part in a double blind crossover trial. They received a 10-minute treatment with an ultrasound generator and an identical placebo device on two separate visits. The devices were randomly allocated on the first visit. At each visit the patient noted whether their tinnitus was completely improved, slightly improved, unchanged or made worse by the treatment. Forty per cent of patients who completed the trial were improved by ultrasound, 7% by placebo. Low powered ultrasound was significantly better at producing improvement than placebo (p < 0.02 Binomial Test).

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