Table 1. Criteria for diagnosis of acute low-tone sensorineural hearing loss without vertigo

Main symptoms

1. Acute or sudden onset of cochlear symptoms including ear fullness, tinnitus, and hearing loss. 2. Low-tone hearing loss. 3. Without vertigo. 4. Unknown cause.

For reference

1. Audiometric criteria of low-tone hearing loss.  (1) The sum of hearing levels at low frequencies of 0.125, 0.25, and 0.5 kHz is 70 dB or more.  (2) The sum of hearing levels at high frequencies of 2, 4, and 8 kHz is 60 dB or less. 2. Cochlear symptoms may be recurrent. 3. May progress to meniere’s disease. 4. May be accompanied with light dizzy sensation. 5. May be bilateral.

Definite: All of the main symptoms, Audiometric criteria (1) and (2).
Probable: All of the main symptoms, Audiometric criteria (1) and the same hearing levels at high frequencies of 2, 4, and 8 kHz as the contralateral ear. These criteria were established by the Research Committee of the Ministry of Health and Welfare of Japan in 2011.
Adapted from Yoshida et al. [2] with CC BY-NC-ND.