Tympano metry is an electronic and acoustic measurement technique, which is used in the initial and subsequent evaluations of patients to assess tympanic membrane mobility. Objective of this technique is to identify patients hearing ability by hyperbaric treatment. Roles of this method are diagnosis, treatment and follow-up of Otitis media in general practice. It provides a graphic representation of the relationship of air pressure in the external ear canal to impedance of the ear drum. Three types of curves depicting tympanic membrane compliance and mobility can be distinguished using Tympano metry. Type-A curve indicates normal middle ear pressures and tympanic membrane mobility. Type-C curve identifies patients with negative middle ear pressures because of Eustachian tube obstruction and reduced tympanic membrane compliance. Type-B curve are flat with no change in compliance with positive or negative pressure applied to the tympanic membrane and are found when the middle ear space is filled with fluid.

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Membrane Compliance Middle Ear Pressure Otitis Media Tympano-metry