Evaluating the Efficacy of Topical Intranasal Fluorescein for Localizing CSF Rhinorrhea: A Systematic Review

Abstract

Objective: To assess existing literature on topical intranasal fluorescein (TINF) for the diagnosis and localization of nasal cerebrospinal fluid (CSF). Study Design: Systematic review. Methods: A 6-database literature search was conducted to identify articles providing insight into TINF for the diagnosis and treatment of sinonasal CSF leak. Demographic characteristics, technical details, efficacy, and safety data were extracted and analyzed. Methodological quality was assessed using Methodological Items for Non-Randomized Studies (MINORS) criteria. Results: All studies reported a diagnostic accuracy rate ≥96%. There were no major complications reported for any patient (n=99) with either 5% or 10% fluorescein use. The MINORS instrument of methodological quality indicated that the assessed studies were of moderate quality (7.29 out of a maximum score of 24). Conclusion: This systematic review indicates that TINF is an easy, safe, inexpensive, and sensitive approach for the diagnosis and treatment of sinonasal CSF leakage. For these reasons, it may be especially well suited for resource-limited clinical scenarios.