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The effect of low-level laser therapy on hearing
Shawn S Goodman1, Ruth A Bentler, Andrew Dittberner
1Department of Communication Sciences & Disorders, The University of Iowa, Iowa City, IA 52242, USA.
ISRN Otolaryngology
|September 12, 2013
Summary
Low-level laser therapy (LLLT) did not significantly improve hearing, speech understanding, or cochlear function in adults with hearing loss. This randomized controlled trial found no clinical benefits from LLLT for auditory health.
Area of Science:
- Otolaryngology
- Biomedical Engineering
- Audiology
Background:
- Low-level laser therapy (LLLT) is explored for cellular healing.
- Previous studies on LLLT for hearing loss and tinnitus yield inconsistent results.
Purpose of the Study:
- To investigate the efficacy of LLLT in enhancing hearing, speech comprehension, and cochlear function in adults experiencing hearing loss.
Main Methods:
- A randomized, double-blind, placebo-controlled trial involving three groups: treatment, placebo, and control.
- LLLT involved applying low-level lasers to the outer ear, head, and neck over three sessions within one week.
- Auditory assessments included pure-tone audiometry, the Connected Speech Test, and transient-evoked otoacoustic emissions, administered pre- and post-treatment.
Main Results:
- No statistically significant differences were observed between the LLLT group and control/placebo groups across all auditory tests.
- Individual subject analysis also revealed no clinically significant improvements in hearing or related functions.
Conclusions:
- LLLT, as applied in this study, did not demonstrate effectiveness in improving auditory function in adults with hearing loss.
- Further research may be needed to explore alternative LLLT parameters or patient populations, but current evidence is inconclusive.
