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The patient had a conductive hearing loss of 43.8 dB in the right ear and 35.0 dB in the left ear (quadrant, mean hearing level). The size of the tympanic membrane perforation was smaller in the right ear than in the left ear, but the hearing loss was greater in the right ear. After treatment, hearing levels improved to 13.8 dB in the right ear and 6.3 dB in the left ear.
a: Audiogram before treatment.
b: Audiogram after treatment.
