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Published on: March 24, 2023
879
Effect of cochlear implantation on middle ear function: A three-month prospective study
Joseph D Wasson1, Luke Campbell1, Scott Chambers1
1Department of Otolaryngology, The University of Melbourne, Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia.
The Laryngoscope
|October 9, 2017
Summary
Cochlear implantation does not significantly affect the middle ear
Area of Science:
- Otolaryngology
- Audiology
- Biomedical Engineering
Background:
- Cochlear implantation is a common treatment for severe to profound hearing loss.
- Potential delayed effects on the middle ear's conductive function require investigation.
Purpose of the Study:
- To assess the impact of cochlear implantation on the middle ear conductive mechanism.
- To evaluate changes in tympanic membrane (TM) vibration using laser Doppler vibrometry (LDV).
Main Methods:
- Prospective cohort study involving 11 adult unilateral cochlear implant recipients.
- LDV measurements of TM velocity (umbo velocity transfer function) were taken preoperatively and 3 months postoperatively.
- Measurements included air-conduction (AC) and bone-conduction (BC) stimuli, comparing implanted and contralateral ears.
Main Results:
- No significant changes were observed in TM velocity magnitude or phase angle in the implanted ear compared to the control ear.
- Both AC and BC stimuli showed no delayed effect on the middle ear conductive mechanism post-implantation.
Conclusions:
- Cochlear implantation does not appear to have a significant delayed negative effect on the middle ear's conductive function.
- LDV measurements confirm the safety of cochlear implantation regarding middle ear mechanics.
