What does high impedance in a tympanometric measurement indicate?

High impedance in a tympanometric measurement indicates a high stiffness of the middle ear system. When the impedance is high, it suggests that there is a reduced ability of the middle ear to transmit sound vibrations effectively. This is often attributed to factors like fluid in the middle ear, eustachian tube dysfunction, or other conditions that create stiffness or blockage within the middle ear.

In typical tympanometry, impedance is assessed by measuring how well sound energy passes through the middle ear system. When the system is stiff, it does not allow sound energy to pass as freely, which results in a high impedance reading. This is clinically significant, as it can point to specific hearing issues that could be addressed through further evaluation or treatment. Understanding the implications of high impedance is essential in diagnosing and managing hearing disorders across different age groups.