Prevention of Noise-induced Damage by Use of Antioxidants
The current study is a dubble-blinde placebo-controlled cross-over study verifying the preventive effect of antioxidants on noise-induced hearing loss (NIHL) and noise-induced tinnitus (NIT). The antioxidants comprise of a mixture of magnesium and n-acetylcystein which should be taken 1h before leisure noise above 100dB for at least 30 minutes.
|Study Design:||Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Prevention
- Protection against noise-induced tinnitus due to antioxidants
Antioxidants protect against temporary threshold shift. The most prevalent cause of noise-induced tinnitus is noise-induced hearing loss. Therefore, it is assumed that the preventive intake of antioxidants prior to a loud event, might protect against threshold shift as well as noise-induced tinnitus.
A 50% decrease of tinnitus loudness scored on a Visual Analogue Scale (VAS) compared to placebo trials is expected.
- Change of tinnitus durationIt is expected that with the intake of antioxidants noise-induced tinnitus is prevented or reduced after loud music exposure. In addition, it is expected that the tinnitus persistence is shortened compared to the placebo arm.
- Decrease of temporary threshold shift in antioxidant trials compared to placebo trialsA limited number of participants will have audiological testing (audiometry including high frequency audiometry, speech-in-noise testing and otoacoustic emissions) prior to the musical event as well as the morning after noise exposure in order to measure the effects of antioxidants on the hearing thresholds and hearing performance.
|Study Start Date:||November 2012|
|Placebo Comparator: sugar pill|
Active Comparator: Antioxidantia
Dosage: 600mg n-acetylcystein and 200mg magnesium intake: 1 hour before leisure noise exposure above 100dB of at least 30 minutes frequency: 4 separate events (2x placebo, 2x antioxidants)
|Contact: Annick Gilles, Master||32 3 821 52 firstname.lastname@example.org|
|Antwerp University Hospital||Recruiting|
|Antwerp, Edegem, Belgium, 2650|
|Contact: Annick Gilles, Master 32 821 32 57 email@example.com|
|Sub-Investigator: Annick Gilles, Master|