ArticleThe journal of international advanced otology2025
Can Electrocochleography Predict Pure Tone Thresholds Without Correction Factors?
Article in The journal of international advanced otology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundElectrocochleography (EcochG) is a valuable method for determining frequency-specific objective hearing thresholds. While pure tone audiometry (PTA) is the gold standard, it can be inconclusive in certain populations, such as infants and non-responders. Auditory brainstem response is the primary electrophysiological test for threshold estimation in these groups. However, EcochG offers the advantage of closer field measurements, making it a promising alternative. This study compares PTA-based subjective thresholds with EcochG-derived objective thresholds in patients with varying degrees of hearing loss.
methodsParticipants consisted of individuals with both normal hearing and varying degrees of hearing loss. 0.5, 1, 2, and 4 kHz tone-burst stimuli and click stimuli were used to measure the latency and amplitude of action potentials (APs) using extra-tympanic electrodes. The AP component of the EcochG response was used as the primary measure for estimating hearing thresholds and was compared with PTA data.
resultsThere is a strong correlation between 0.5, 1, 2, and 4 kHz pure tone thresholds (PTTs) and EcochG thresholds of the same frequencies (P < .001). Also, there is a strong correlation between click stimulus and the 4-frequency pure tone average (P < .001). The results of the linear regression analysis showed that the 0.5, 1, 2, and 4 kHz PTTs can be predicted using EcochG. Electrocochleography with click stimuli can also predict PTA of 4 frequencies.
conclusionUsing the EcochG test, hearing thresholds can be estimated without the need for a correction factor according to our results.
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