A Clinical Study of Hearing Loss Type in Idiopathic Sudden Sensorineural Hearing Loss

Abstract

Our study of 677 cases of idiopathic sudden sensorineural hearing loss (ISSNHL) related to posttreatment recovery yielded the following results:
1) Most subjects—36.8%—had horizontal hearing loss
2) V character hearing loss curve was highest at 61.7% and lowest in high tone, near total deaf, and total deaf.
3) We classified 6 hearing loss types into 4 prognostic types—good for V character, intermediate for horizontal and reverse V, poor for high tone and near total deaf, extremely poor for total deaf.
4) Good recovery—a hearing level improvement of ≥30dB—was relatively high in near total deaf hearing loss.
5) Total deaf hearing loss had the highest vertigo at 68.4%.