What does Type A Tympanogram mean?

Type A tympanograms look like a teepee, and indicate a normal middle ear system, free of fluid or physiological anomalies which would prevent the admittance of sound from the middle ear into the cochlea.

What causes an as Tympanogram?

Reduced mobility of the tympanic membrane caused by a stiffened middle ear system can cause a shallow peak on the tympanogram, called a Type As tympanogram.

How do you interpret Tympanogram results?

To interpret tympanometry tests, you’ll mainly look at the peak of the graph. Tympanogram results are categorized as either a Type A, Type B, or Type C. Type A results are considered normal. Type B results are considered abnormal (or “flat”) and often mean the patient has fluid in the middle ear.

What is normal middle ear peak pressure range?

Middle ear pressure between -99 to +50 mmH2O. Static compliance between 0.3-1.6 cc in adults. Static compliance between 0.2-0.9 cc in children 3-5 years of age. Ear canal volume within normal range.

What is Tympanometry in audiology?

Tympanometry. Tympanometry tests how well your eardrum moves. The audiologist will put a small probe, which looks like an earphone, into each ear. This can help the audiologist know if you have middle ear fluid, a hole in the eardrum, or wax in your ear canal. The test can help find out if a child has an ear infection.

What does a flat Tympanogram mean?

A flat tympanogram (type B) means a stiff tympanic membrane and predicts fluid in the middle ear (a positive predictive value of approximately 90\%). A normal tympanogram (type A) means a middle ear without fluid and an intact tympanic membrane (a negative predictive value up to more than 95\%).

What does flat Tympanogram mean?

What are normal tympanometry results?

Typically for children a volume range of 0.5 to 1.5 cc is typically considered normal, while for adults the range is 0.5 to 2.00 cc.

What are the different types of Tympanograms?

Tympanogram tracings are classified as type A (normal), type B (flat, clearly abnormal), and type C (indicating a significantly negative pressure in the middle ear, possibly indicative of pathology).

What does shallow Tympanogram mean?

“AS” ( S=shallow) tympanogram pattern has a low peak amplitude of compliance suggesting a stiffened middle ear system. AD (D=deep) tympanogram pattern occurs when the TM is very flaccid or when there is disarticulation of the ossicular chain.