Abstract
The study aim was to investigate audiology characteristics among a large cohort of patients with myringosclerosis in southwest China. Data included: audiometry, otoendoscopy and high‐resolution CT. High‐resolution CT used only with conductive or mixed hearing loss patients who had air bone gap values greater than 10 dB hearing level (dB HL) in partial frequencies.
Patients with sclerotic plaque ratios less than 1/3 of the tympanic membrane area were more likely to have type‐A tympanogram and type‐1blg multi‐frequency tympanogram. Patients with a sclerotic plaque ratio greater than 2/3 of the tympanic membrane area had lower acoustic admittance compared with other groups.
Patients whose sclerotic plaques were located in the pars tensa without involvement of the umbo of the tympanic membrane, malleolar prominence or malleolar stria more often presented a type‐A tympanogram and had a higher likelihood of showing a type‐1b1g multi‐frequency tympanogram. Patients with sclerotic plaques on the tympanic annulus with involvement of the umbo of the tympanic membrane, malleolar prominence or malleolar stria had higher pure tone averages and lower acoustic admittance values compared with other groups.
Myringosclerosis may cause tympanometric and acoustic admittance abnormalities but does not affect speech discrimination scores, resonance frequency or tympanic pressure.
Average air bone gap values do not exceed 10 dB HL in patients with myringosclerosis; thus, myringosclerosis may not induce conductive hearing loss.
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