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Transmeatal low-level laser therapy for chronic tinnitus with cochlear dysfunction.

R Teggi1, C Bellini, L O Piccioni

  • 1ENT Department, San Raffaele Hospital, 'Vita e Salute' University, Milan, Italy. teggi.roberto@hsr.it

Audiology & Neuro-Otology
|October 10, 2008
PubMed
Summary

Low-level laser therapy (LLLT) showed no significant improvement for tinnitus patients. This randomized study found LLLT did not reduce tinnitus handicap or loudness compared to a placebo.

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Area of Science:

  • Otolaryngology
  • Audiology
  • Medical Technology

Background:

  • Tinnitus, often associated with sensorineural hearing loss, significantly impacts quality of life.
  • Exploring novel therapeutic interventions for tinnitus is crucial due to limited effective treatments.

Purpose of the Study:

  • To evaluate the efficacy of low-level laser therapy (LLLT) as a treatment for subjective tinnitus.
  • To assess LLLT's impact on tinnitus severity, loudness, and associated auditory parameters.

Main Methods:

  • A prospective, randomized, double-blind, placebo-controlled study involving 60 outpatients with tinnitus and sensorineural hearing loss.
  • Participants received either active 650-nm, 5-mW soft laser therapy or a sham device daily for 3 months.
  • Outcomes were measured using the Tinnitus Handicap Inventory (THI), visual analog scale for loudness, and psychoacoustic tests.

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Main Results:

  • No statistically significant differences were observed between the active laser and placebo groups in overall THI scores or its subscales.
  • Self-perceived tinnitus loudness and minimum masking levels did not differ between groups.
  • The active laser group showed a statistically significant reduction in tinnitus loudness (sensation level) and a decreased incidence of hyperacusis.

Conclusions:

  • Soft laser therapy, as applied in this study, demonstrated no overall efficacy in treating tinnitus.
  • While some secondary benefits like reduced hyperacusis were noted, LLLT is not a recommended therapeutic measure for tinnitus.