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Updated: Jan 15, 2026
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Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
Published on: January 25, 2016
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The bone conduction threshold pattern may help to estimate the pathology underlying conductive hearing loss
Motoki Hirabayashi1, Sho Kurihara2, Hajime Shimmura1
1Department of Otorhinolaryngology, The Jikei University School of Medicine, 3-19-18 Nishishimbashi, Minato-ku, Tokyo, 105-8471, Japan.
Scientific Reports
|October 8, 2025
Summary
Bone conduction audiograms reveal distinct patterns differentiating ossicular sclerosis from discontinuity. Analyzing these patterns can aid in preoperative diagnosis for conductive hearing loss patients.
Area of Science:
- Audiology
- Otolaryngology
- Medical Diagnostics
Background:
- Bone conduction thresholds in audiograms offer valuable clinical data.
- The utility of bone conduction audiograms in differentiating conductive hearing disorders is not well-established.
Purpose of the Study:
- To investigate if bone conduction threshold patterns can distinguish between different types of conductive hearing loss, specifically ossicular sclerosis and ossicular discontinuity.
- To explore the diagnostic potential of bone conduction audiometry in preoperative assessments.
Main Methods:
- A retrospective case-control study comparing bone conduction thresholds in patients with surgically confirmed hearing loss (ossicular sclerosis, ossicular discontinuity, tympanic membrane perforation) and a normal-hearing group.
- Analysis of pure tone audiometry data, focusing on bone conduction threshold patterns at various frequencies.
- Statistical analysis including likelihood ratios to determine associations between threshold patterns and specific ossicular conditions.
Main Results:
- Ossicular fixation showed a characteristic dip at 2 kHz in 57.8% of cases.
- Ossicular discontinuity was associated with a steep >10 dB HL downslope from 1-3 kHz (75.0%) and a tendency for a dip at 3 kHz (56.3%).
- Specific low-frequency bone conduction threshold patterns (upslope vs. downslope) correlated with the likelihood of malleus/incus fixation versus stapes fixation, and incomplete versus complete ossicular discontinuity.
Conclusions:
- Bone conduction threshold patterns exhibit unique characteristics for ossicular sclerosis and ossicular discontinuity.
- Analysis of these patterns may improve preoperative diagnosis accuracy for conductive hearing loss.
- This study highlights the potential of bone conduction audiometry as a diagnostic tool in otologic evaluations.
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