The following test is useful for diagnosis of
Ans. (b) Meniere's disease.* The image shows performance of the caloric stimulation test.* Irrigation of the external meatus with water 7deg above and later 7deg below body temperature sets up convection currents of the endolymph in the semi-circular canals.* This causes nystagmus, and the duration of the nystagmus gives an index of the activity of the labyrinth. The nystagmus can be directly observed or recorded electrically (electronystagmography).* This test is particularly valuable in the diagnosis of Meniere's disease and acoustic neuroma. A reduced or absent nystagmus is found (canal paresis).
Unsafe CSOM
Meniere's disease
Gradenigo syndrome
Cholesteatoma
Diagnostic & Operative ENT