Nov 1, 2004 · 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...

Impedance testing is crucial in distinguishing a conductive loss from a sensorineural hearing loss. A typical tympanometry result indicates the ear canal volume (cm3), the max pressure (daPa) and the peak compliance (ml). An audiogram represents an individual’s hearing ability by frequency (pitch) and intensity (volume).

Jan 22, 2007 · Type C tympanograms (Figure 3) are still shaped like a teepee, but are shifted negatively on the graph. This indicates negative pressure in the middle ear space, often consistent with sinus or allergy congestion, or the end-stages of a cold or ear infection.

Nov 3, 2023 · Tympanometry Type C: Type C tympanograms show a peak, but it occurs when air pressure is more negative than in Type A tympanograms. This suggests negative pressure in the middle ear, which could indicate Eustachian tube dysfunction or the initial or resolving stages of an ear infection.

Type C tympanogram. Type C suggests significant negative pressure in the middle ear system and may suggest developing or resolving otitis media. Additionally, this type indicates a malfunctioning eustachian tube. Immittance peak is measurable, but compliance peak is less than -150 daPa (see Figure 11 below) Figure 11. Type C tympanogram

Jul 28, 2022 · Type C This indicates a highly negative middle ear pressure, which often results in a retracted eardrum. Common causes include upper respiratory illnesses, a developing or recovering ear infection or Eustachian tube dysfunction.

Jun 20, 2024 · Tympanometry is a method of testing the function of the middle ear. Unlike audiometry, it does not test the ear’s sensitivity to sound or the hearing threshold of the patient. Instead, it is used to detect if sound, when presented to the ear canal, travels through the middle ear space effectively.

Type C This tympanogram shows a peak compliance but shifted to the negative pressure side of the X-axis. It suggests negative pressure in the middle ear and can be indicative of eustachian tube dysfunction. There are other parameters to assess alongside the test compliance curve.

This Type Cd tympanogram, with increased compliance (Comp = 4.8) and low middle ear pressure (Pres = -240), also suggests either an ossicular subluxation, or healed tympanic membrane perforation (similar to Type Ad) with Eustachian tube dysfunction. Type C: Type C tympanograms generally have similar compliance values and shapes as Type A ...