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Bone-anchored Hearing Aids: correlation between pure-tone thresholds and outcome in three user groups
Flurin Pfiffner1, Martin Kompis, Christof Stieger
1Department of ENT, Head and Neck Surgery, Inselspital, University of Bern, Bern, Switzerland.
Summary
Preoperative bone conduction thresholds of the better ear can predict Bone-anchored Hearing Aid (BAHA) outcomes. Improved hearing thresholds correlate with better speech understanding in quiet for BAHA users.
Area of Science:
- Audiology
- Otolaryngology
- Biomedical Engineering
Background:
- Bone-anchored Hearing Aids (BAHA) offer solutions for hearing loss.
- Predicting postoperative outcomes is crucial for patient management.
Purpose of the Study:
- To explore correlations between pre- and post-operative hearing metrics in BAHA users.
- To establish a basis for estimating BAHA outcomes from preoperative data.
Main Methods:
- Retrospective case review of 92 adult BAHA users at a tertiary referral center.
- Analysis of preoperative air and bone conduction thresholds against postoperative aided thresholds and speech understanding.
- Categorization into three groups based on hearing loss type: unilateral conductive, bilateral conductive, and single-sided deafness.
Main Results:
- Postoperative aided sound-field thresholds showed the strongest correlation with the better ear's bone conduction (BC) threshold (r²=0.237-0.419).
- Observed improvements in sound-field thresholds directly corresponded to enhanced speech understanding.
Conclusions:
- The BC threshold of the better ear is the most reliable predictor for estimating postoperative aided sound-field thresholds in BAHA users.
- Speech understanding in quiet can be estimated by the improvement in sound-field thresholds for the studied patient groups.
