Abstract
Objective: To study differences between electrocochleography (ECochG) and cochlear hydrops analysis masking procedure (CHAMP) in diagnosis of Ménière's disease. Design: Retrospective case review from a tertiary referral center. Study sample: Thirty patients suspected to have Ménière's disease were assessed by ECochG and CHAMP tests. Results: Positivity of ECochG with SP/AP amplitude ratio >.40 or >.35 was compared with CHAMP V-delay or CHAMP R × D. Positive ECochG results were found in 43% (>.40 SP/AP ratio) and 63% (>.35 SP/AP ratio) of patients, comparing to positive CHAMP V delay in 27% and CHAMP R × D in 30% of patients. A significant difference (p <.01) was found between ECochG and CHAMP in diagnostic sensitivity. Also, a positive inter-aural correlation was found in CHAMP results (p <.003), but not in ECochG (p =.082) results. Conclusions: ECochG is a more sensitive test than CHAMP in detecting the presence of endolymphatic hydrops in Ménière's patients. CHAMP covaried interaurally in unilateral Ménière's patients whereas ECochG did not.
Acknowledgements
We thank Dr. Ken Henry of the Professional Hearing Services - The Dizziness and Balance Center for valuable support. We also thank Bloomsburg University Writing Center for proofreading the manuscript.
Declaration of interest: The authors report no conflicts of interest. The authors are responsible for the content and writing of the paper.