Transtympanic Electrocochleography for the Diagnosis of Ménière's Disease

Table 3

Electrocochleography criteria [27]. The diagnostic level was chosen as the nearest whole figure to the level which provides a false-positive diagnosis rate of 5%. The likelihood of hydrops is a Gibson score of >7/10 [6]. Clicks: abnormal if SP/AP ratio ≥0.50.

Tone bursts
Tone burst frequency	Hearing level dBHL	Abnormal if SP ≤
0.5 kHz (75 dBHL)	Under 25	−2 μV
	20–35	−2 μV
	40–55	−2 μV
	60–75	−1 μV
1 kHz (90 dBHL)	Under 25	−6 μV
	20–35	−6 μV
	40–55	−6 μV
	60–75	−3 μV
2 kHz (100 dBHL)	Under 25	−9 μV
	20–35	−7 μV
	40–55	−5 μV
	60–75	−5 μV
4 kHz (75 dBHL)	Under 25	−9 μV
	20–35	−5 μV
	40–55	−5 μV
	60–75	−5 μV