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• Electrocochleography - indirectly measures endolymphatic pressure and electrical activity in the inner ear which may be elevated in some cases of Meniere's disease. Some clinicians use electrocochleography to confirm the diagnosis of Meniere's disease. Although this is a valuable test, it is not widely available.
• Glycerol test - following an initial audiogram, the patient is given an equal volume of glycerol and grapefruit juice to drink. After three hours, the audiogram is repeated. An improvement of 5-10 decibels in two or more frequencies or an improvement in word discrimination scores increases the likelihood of a diagnosis of Meniere's disease. However, a negative glycerol test does not rule out a diagnosis of Meniere's disease.

Imaging Studies

• Computerized Tomography (CT) of the head to visualize any abnormal masses
• Magnetic Resonance Imaging (MRI) to look for small tumors along the vestibulocochlear nerve which may cause symptoms similar to those of Meniere's disease (e.g., acoustic neuroma)
• High Resolution Computed Tomography (HRCT) to observe evidence of otosclerotic changes