Info On Tympanic Membrane

+200

Figure 6.7 Tympanogram type B of the same case, typical of middle ear effusion.

Figure 6.8 Right ear. Grade I atelectasis. The tympanic membrane is markedly thinned due to partial resorption of the lamina propria. The incus is seen in transparency. Pure tone audiogram is normal (Fig. 6.9), whereas the tympanogram has a very high compliance (Fig. 6.10). As the tympanic membrane is mobile with the Valsalva maneuver, insertion of a ventilation tube is not indicated.

10 dBHL

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