Intratympanic steroids for inner ear disorders: a review

Area of Science:

• Otolaryngology
• Clinical Pharmacology
• Evidence-Based Medicine

Background:

• Intratympanic steroids (ITS) are increasingly used for inner ear disorders such as Ménière's Disease (MD) and sudden sensorineural hearing loss (SSNHL).
• A review of clinical trials is needed to assess the efficacy of ITS for these conditions.

Purpose of the Study:

• To review existing clinical trials evaluating the effectiveness of intratympanic steroids (ITS) for inner ear disorders.
• To assess the quality and comparability of current research on ITS for Ménière's Disease and sudden sensorineural hearing loss.

Main Methods:

• Searched PubMed and Ovid Medline databases for clinical trials on ITS for MD and SSNHL.
• Evaluated 38 identified studies based on comparability, internal validity, and external validity criteria.

Main Results:

• Most studies lacked placebo controls, and only 3 were double-blinded randomized prospective trials.
• Significant heterogeneity was observed in steroid doses, treatment protocols, and outcome definitions across studies.
• Difficulties in comparing studies due to data heterogeneity were noted.

Conclusions:

• Current clinical trials on ITS for inner ear disorders lack sufficient quality (comparability, internal, and external validity).
• More rigorously designed studies are essential to establish the efficacy of ITS.
• Further research should focus on determining optimal steroid choices and treatment regimens.