Audiological characteristics and exploratory treatment of a rare condition of acute-otitis-media-associated sudden sensorineural hearing loss

Figure 1 Audiogram. Audiogram pretreatment: conductive hearing loss was observed at low frequencies of 0.25–1 kHz, and sensorineural hearing loss was seen at high frequencies of 2–4 kHz; the hearing threshold of the left ear was normal. [: Bone conduction of right ear with sheltering; <: Bone conduction of left ear; O: Air conduction of right ear; ∆: Air conduction of right ear with sheltering; ×: Air conduction of left ear; blue markers = left ear; red markers = right ear.

Figure 2 Audiogram. Audiogram after treatment: Conductive hearing loss at low frequencies of the same patient disappeared and sensorineural hearing loss observed at high frequencies of 2–4kHz was restored to the hearing level of the healthy ear; the hearing threshold of the left ear was normal. O: Air conduction of right ear = bone conduction of right ear; ×: Air conduction of left ear = bone conduction of left ear; blue markers = left ear; red markers = right ear.