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Updated: Jun 29, 2026
Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
Published on: June 21, 2024
Electromyographical recording of the electrically elicited stapedius reflex via a bipolar hook electrode
Hans Wilhelm Pau1, Thorsten Zehlicke, Uwe Sievert
1ENT Department, Medical School, University of Rostock, Austria. hans-wilhelm.pau@med.uni-rostock.de
Objective:
To prove the feasibility of recording stapedius reflexes by bipolar electromyography intra-operatively during cochlea implant via a bipolar hook needle electrode.
Study Design:
Prospective study.
Setting:
Tertiary referral center.
Patients:
Adults receiving a MED-EL cochlear implant.
Intervention:
Diagnostic.
Main Outcome Measures:
Stapedius reflex responses can be recorded by electromyography.
Results:
A double hook electrode could be inserted into the muscle tissue via the natural opening of the pyramid process along with the stapedius tendon. In 7 out of 10 patients supplied with MED-EL CIs (PULSARCI100 or SONATATI100), electrically elicited stapedius reflex potentials were recorded after eliminating stimulation artifacts caused by electromagnetic fields during electrical stimulation by low pass filtering.
Conclusion:
Intraoperative stapedius reflex recording by bipolar electromyography via a hook electrode is feasible. Further research will show whether these signals may be used for establishing a self-adjusting speech processor.
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