What is the normal compliance range for TM movement?

The normal compliance range for tympanic membrane (TM) movement is typically considered to be between 0.3 to 1.4 mmho. Compliance is a measure of the mobility of the tympanic membrane and is an important parameter in tympanometry, which evaluates the middle ear function.

When the TM exhibits compliance within this range, it indicates that the middle ear is functioning properly, allowing for appropriate pressure equalization and sound transmission. Values lower than this range may suggest conditions such as fluid in the middle ear or otosclerosis, whereas values higher than normal can indicate eustachian tube dysfunction or perforation of the TM.

Understanding the normal compliance range is crucial for audiologists and hearing aid dispensers as it helps to assess and diagnose potential middle ear pathologies, guiding further testing or treatment options as needed.