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Tympanometry

Contents of this page:

Illustrations

Ear anatomy
Ear anatomy
Otoscope examination
Otoscope examination

Alternative Names    Return to top

Tympanogram

Definition    Return to top

Tympanometry is a test used to detect disorders of the middle ear.

How the Test is Performed    Return to top

Before the test, your health care provider will look inside your ear canal to make sure there is a clear path to your 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    Return to top

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 and potentially startling. You will need to try very hard to avoid being anxious and becoming 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 familiar your child is with what will happen and why, the less anxiety he or she will feel.

How the Test Will Feel    Return to top

There may be some discomfort while the probe is in the ear, but no harm will result. You will hear a loud tone as the measurements are taken.

Why the Test is Performed    Return to top

This test measures your ear's responses to the sound and different pressures.

Normal Results    Return to top

The pressure inside the middle ear can vary by 100 daPa (a very small amount). The eardrum should look smooth.

What Abnormal Results Mean    Return to top

Tympanometry may reveal any of the following:

Risks    Return to top

There are no risks.

References    Return to top

Seidman MD, Simpson GT II, Khan MJ. Common problems of the ear. In: Noble J, eds. Textbook of Primary Care Medicine. 3rd ed. Philadelphia, Pa: Mosby Elsevier; 2001:chap 178.

Cummings CW, Flint PW, Haughey BH, et al. Otolaryngology: Head & Neck Surgery. 4th ed. St Louis, Mo; Mosby; 2005:3514.

Update Date: 5/13/2009

Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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