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Direct Drive Simulation-Preoperative Sound Simulation of "Vibroplasty-Hearing" in Patients With Mixed Hearing Loss
Stefan Kaulitz1, Wilma Großmann2, Julia Steinbach1
1Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University of Wuerzburg, Wuerzburg.
Objective:
Validation of the preoperative sound simulation test for vibroplasty-hearing so-called "Direct Drive Simulation" (DDS) in case of mixed hearing loss.
Study Design:
Retrospective data analysis.
Setting:
Tertiary referral center with a large hearing implant program.
Main Outcome Measure:
Comparison of sound impression during preoperative Direct Drive Simulation, and postoperative testing with the activated active middle ear implant (AMEI) under free-field condition and in daily routine.
Patients:
Fifty-four data sets from 18 patients with mixed hearing loss with a mean age of 60.78 ± 3.18 were included.
Results:
Comparing the sound impression during DDS preoperatively versus free-field testing with the implanted AMEI, no significant differences were found. DDS offers a slightly better sound quality than the AMEI in daily routine, fitting well to the ideal listening situation in DDS versus some background noise in daily routine.
Conclusion:
The DDS offers the possibility of a realistic preoperative sound simulation of the "vibroplasty-hearing" in cases of mixed hearing loss. This probably facilitates patient's decision towards a vibroplasty. The audiologist as well as the surgeon get additional information regarding the indication especially when audiologic inclusion criteria are critical. Thus, the DDS is a useful extension of preoperative diagnostics before vibroplasty.
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