Calculated versus measured pure tone bone conduction 3 kHz thresholds in sudden sensorineural hearing loss

S. Shilo, T. Ziv-Baran, Y. Oron, O. Handzel, O. Cavel, R. A. Eta, N. Muhanna, Omer J. Ungar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Objective To compare the measured bone conduction threshold at 3 kHz with the calculated threshold in newly diagnosed sudden sensorineural hearing loss. Methods A retrospective chart review was conducted of pure tone audiograms in confirmed sudden sensorineural hearing loss cases. Results Of 157 patients with sudden sensorineural hearing loss, 144 had idiopathic hearing loss, 8 had vestibular schwannoma and 5 had Ménière's disease. The r value for the correlation between the two methods of 3 kHz assessment for all patients was 0.887 (p < 0.001). The mean difference between the measured and calculated 3 kHz thresholds was 0.76 ± 7.96 dB, 0.4 ± 8.08 dB and 1.5 ± 1.8 dB in the sudden sensorineural hearing loss, idiopathic and Ménière's disease groups, respectively. The mean difference between the measured and calculated 3 kHz thresholds was significantly greater in the vestibular schwannoma group (6.86 ± 4.38 dB) than in the idiopathic group (p = 0.013). Conclusion The 3 kHz frequency may encompass important audiometric information. A discrepancy between the measured and calculated bone conduction 3 kHz thresholds raises suspicion of an underlying vestibular schwannoma as an aetiology for sudden sensorineural hearing loss, and these thresholds should therefore be measured independently and routinely.

Original languageEnglish
Pages (from-to)820-824
Number of pages5
JournalJournal of Laryngology and Otology
Volume135
Issue number9
DOIs
StatePublished - Sep 2021

Keywords

  • Audiometry
  • Bone Conduction
  • Meniere Disease
  • Sensorineural Hearing Loss
  • Vestibular Schwannoma

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