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Clinical validation of percutaneous cochlear implant surgery: initial report
Robert Frederick Labadie1, Jack H Noble, Benoit M Dawant
1Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University, Nashville, Tennessee 37232-8605, USA. robert.labadie@vanderbilt.edu
The Laryngoscope
|April 11, 2008
Summary
This study validates percutaneous cochlear implant surgery using custom drill guides. The technique safely and accurately accesses the cochlea via the facial recess, offering a new approach for cochlear implantation.
Area of Science:
- Otolaryngology
- Neurosurgery
- Medical Imaging
Background:
- Traditional cochlear implant surgery involves a drill path from the mastoid cortex to the cochlea.
- Percutaneous access offers a potentially less invasive approach.
Purpose of the Study:
- To clinically validate a percutaneous cochlear implant surgical technique.
- To assess the safety and accuracy of custom drill guides for cochlear access.
Main Methods:
- Prospective clinical trial involving five ears.
- Preoperative CT scans used for manual and automated path planning.
- Customized microstereotactic frames served as rapid-prototyped drill guides.
- Intraoperative photodocumentation assessed path accuracy.
Main Results:
- All surgical paths successfully reached the basal turn of the cochlea via the facial recess.
- Drill paths maintained safe distances from the facial nerve and chorda tympani.
- Average distances to the facial nerve were 1.18 mm (manual) and 1.24 mm (automatic).
- Average distances to the chorda tympani were 0.986 mm (manual) and 1.22 mm (automatic).
Conclusions:
- Percutaneous cochlear implant access is feasible using custom drill guides.
- Image-guided surgery technology enables safe and accurate cochlear implant placement.
- This technique validates a novel approach for cochlear implantation.