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Bone-conduction threshold and air-bone gap may predict frequency-specific air-conduction threshold after
Ethan I Huang1,2, Yu-Chieh Wu3, Hsiu-Mei Chuang3
1Department of Otolaryngology, Chang Gung Memorial Hospital, Chiayi, Taiwan.
Plos One
|March 11, 2021
Summary
Predicting postoperative hearing after tympanoplasty is crucial for patient counseling. Preoperative bone-conduction threshold and air-bone gap effectively predict hearing outcomes across various frequencies.
Area of Science:
- Otolaryngology
- Audiology
- Surgical Outcomes Research
Background:
- Patients undergoing tympanoplasty expect improved hearing post-surgery.
- Accurate prediction of hearing outcomes aids in proper patient counseling and expectation management.
- Intraoperative assessment is typically required to understand middle ear pathologies influencing hearing outcomes.
Purpose of the Study:
- To develop predictive models for postoperative air-conduction thresholds in patients undergoing tympanoplasty without ossiculoplasty.
- To assess the efficacy of preoperative bone-conduction thresholds and air-bone gaps in predicting hearing outcomes.
- To provide surgeons with tools for estimating frequency-specific hearing results.
Main Methods:
- Patients undergoing tympanoplasty without ossiculoplasty were divided into training (87 ears) and testing (30 ears) groups.
- No specific exclusion criteria were applied based on perforation size or middle ear conditions.
- Statistical models were built using preoperative bone-conduction thresholds and air-bone gaps to predict postoperative air-conduction thresholds.
Main Results:
- Bone-conduction threshold and air-bone gap significantly predicted postoperative air-conduction threshold at 0.5k, 1k, 2k, and 4k Hz.
- The predictive accuracy did not significantly differ across the tested frequencies.
- These preoperative factors accounted for 56.7% of the variance in mean postoperative air-conduction threshold, with a trend towards higher predictability at higher frequencies.
Conclusions:
- Preoperative bone-conduction thresholds and air-bone gaps are valuable predictors of hearing outcomes after tympanoplasty.
- These predictors can assist surgeons in providing quantitative, evidence-based counseling to patients regarding their expected hearing improvement.
- The findings support the estimation of frequency-specific hearing results, enhancing patient expectation management.
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