Glycerol test is done in -: (A) Otosclerosis, (B) Lateral sinus thrombosis, (C) Meniere's disease, (D) None of the above
Answer is C. Glycerol is a dehydrating agent. When given orally, it reduces endolymph pressure and causes improvement in hearing as evidenced by an improvement of 10 dB or 10% gain in discrimination score in Meniere’s disease patients.