A cohort study of patients with tinnitus and sensorineural hearing loss in a Swedish population

Efficacy of Low-Level Laser Therapy for Tinnitus: A Systematic Review with Meta-Analysis and Trial Sequential Analysis

STUDY OBJECTIVE

Tinnitus is a common disorder characterized by sound in the ear in the absence of external or internal stimuli. Low-level laser therapy (LLLT) was discovered enhancing tissue repair via increasing the blood microcirculation and cell proliferation in 1960s. In the last two decades, LLLT delivered to the cochlea has frequently been used to reduce the severity of tinnitus. However, whether LLLT effectively attenuates the severity of tinnitus remains controversial. We aimed to evaluate the efficacy of low-level laser therapy on adult patients with complaints of tinnitus.

DESIGN

Systematic review and meta-analysis with trial sequential analysis.

INTERVENTIONS

Low-level laser therapy (LLLT).

MEASUREMENTS

Tinnitus Handicap Inventory (THI) score; improvement rates of the visual analog scale (VAS), verbal rating scale (VRS) and numeric rating scale (NRS) scores.

METHODS

We searched PubMed, Embase, Scopus, Web of Science, and the Cochrane Library from inception through 17 September 2020. Randomized control trials that involved adult patients with complaints of tinnitus, compared LLLT to a placebo and provided sufficient information for meta-analysis were considered eligible.

MAIN RESULTS

Overall, 11 studies involving 670 patients were included. No significant difference in the overall effect according to the THI score (mean difference (MD), -2.85; 95% CI, -8.99 to 3.28; p = 0.362; I² = 0%) and the rating scale score improvement rate (risk ratio (RR), 1.35; 95% CI, 0.81 to 2.27; p = 0.250; I² = 67%) was demonstrated between patients receiving LLLT and those receiving a placebo. None of the subgroup analyses showed significant differences, regardless of underlying sensorineural hearing loss, the number of irradiation sessions or the wavelength used.

CONCLUSIONS

Our meta-analysis suggests that the value of LLLT in controlling the severity of tinnitus remains unclear, in part due to the relatively small number of patients and underlying heterogeneity. More large-scale investigations of LLLT for tinnitus related to inner ear disease are required to further elucidate the therapeutic effects.

Development of an educational tool on tinnitus in a website format

ABSTRACT Objective: to develop an educational tool in a Virtual Learning Environment (VLE), in a website format, to supply information on tinnitus, additional content on hearing and to provide access links to other websites related to speech therapy and audiology, so as to promote public health. Methods: an experimental, descriptive study, involving, in its construction, 6 stages elaborated as follows: planning, adaptation, collection of testimonies, inclusion of content, review and dissemination. Results: the site was titled "Do you have tinnitus?" It was subdivided into others: "Home", "Tinnitus?" "Types of tinnitus," "Main causes," "What to do?" "Main forms of treatment," "Tips to relieve tinnitus," "Prevention," "News," "Testimonials," "About your hearing," "What is hearing loss?" "What are speech therapy and audiology?" "Other sites," "Contact" and "About." Illustrations and videos were inserted, and the information contained in any material was classified with easy readability. Conclusion: it was possible to develop a website entitled “Do you have tinnitus?” available at the electronic address: https://vocetemzumbido.wixsite.com/home, providing general information about tinnitus, in addition to additional information on hearing.