Tympanometry
Tympanogram; Otitis media - tympanometry; Effusion - tympanometry; Immittance testing
Tympanometry is a test used to detect problems in the middle ear.
The ear consists of external, middle, and inner structures. The eardrum and the three tiny bones conduct sound from the eardrum to the cochlea.
An otoscope is a tool which shines a beam of light to help visualize and examine the condition of the ear canal and eardrum. Examining the ear can reveal the cause of symptoms such as an earache, the ear feeling full, or hearing loss.
How the Test is Performed
Before the test, your health care provider will look inside your ear to make sure nothing is blocking the eardrum.
Next, a device is placed into your ear. This device changes the air pressure in your ear and makes the eardrum move back and forth. A machine records the results on graphs called tympanograms.
How to Prepare for the Test
You should not move, speak, or swallow during the test. Such movements can change the pressure in the middle ear and give incorrect test results.
The sounds heard during the test may be loud. This may be startling. You will need to try very hard to stay calm and not get startled during the test. If your child is to have this test done, it may be helpful to show how the test is done using a doll. The more your child knows what to expect and why the test is done, the less nervous your child will be.
How the Test will Feel
There may be some discomfort while the probe is in the ear, but no harm will result. You will hear a loud tone and feel pressure in your ear as the measurements are taken.
Why the Test is Performed
This test measures how your ear reacts to sound and different pressures.
Normal Results
The pressure inside the middle ear can vary by a very small amount. The eardrum should look smooth.
What Abnormal Results Mean
Risks
There are no risks with this test.
References
Kerschner JE, Preciado D. Otitis media. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 658.
Woodson E, Mowry S. Otologic symptoms and syndromes. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 137.
Version Info
Last reviewed on: 5/30/2022
Reviewed by: Josef Shargorodsky, MD, MPH, Johns Hopkins University School of Medicine, Baltimore, MD. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
