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Predictive value of intraoperative brainstem auditory evoked responses in surgery for conductive hearing losses
S H Selesnick1, J D Victor, R K Tikoo
1Department of Otorhinolaryngology, New York Hospital-Cornell University Medical Center, NY 10021, USA.
Objective:
To assess the efficacy of intraoperative brainstem auditory evoked responses (BAER) in predicting postoperative hearing improvement in surgery for conductive hearing loss.
Study Design:
A prospective study of consecutive patients undergoing surgery for conductive hearing loss under general anesthesia by a single surgeon.
Setting:
A tertiary care university affiliated medical center.
Patients:
All patients undergoing surgery for conductive hearing loss by the senior author between June 25, 1993 and March 20, 1995.
Interventions:
Pre- and postreconstruction intraoperative BAERs; pre- and postoperative pure tone and speech audiometry.
Main Outcome Measures:
Changes in audiometric pure tone air-conduction thresholds, bone-air gaps (BAG), and speech reception thresholds (SRT), compared with changes in BAER wave five (V) latencies.
Results:
A decrease in the wave V latency on the intraoperative BAER correlates significantly with improvement in postoperative pure-tone air-conduction, BAG, and SRT using chi 2 and linear regression analyses.
Conclusions:
Improvement in intraoperative BAER correlates with postoperative hearing improvement in surgery for conductive hearing loss done under general anesthesia in our population.
