Related Experiment Videos
Auditory brainstem implantation in primates: lessons for human surgery and application.
M Manrique1, F J Cervera-Paz, I Jaúregui
1Department of Otorhinolaryngology, Head and Neck Surgery, University of Navarra, Pamplona, Spain. mmanrique@unav.es
The Journal of Laryngology and Otology. Supplement
|February 24, 2001
Summary
Surface electro-auditory prosthesis (EAP) implantation in macaques showed adequate material biotolerance but risks of surgical trauma and infection. Careful surgical technique is vital for successful EAP outcomes.
Area of Science:
- Neurosurgery
- Auditory prosthetics
- Neuroscience
Background:
- Surface electro-auditory prosthesis (EAP) implantation is a complex surgical procedure.
- Understanding pathological changes in the cochlear nucleus complex (CNC) post-implantation is crucial.
- The relationship between electrical stimulation and tissue response requires investigation.
Purpose of the Study:
- To describe the surgical technique for surface EAP implantation.
- To investigate pathological changes in the CNC after EAP implantation and electrical stimulation.
- To assess the relationship between stimulation parameters and observed pathologies.
Main Methods:
- Fourteen Macaca fascicularis underwent translabyrinthine bilateral auditory neurectomy and unilateral EAP implantation.
- Animals were divided into stimulated (n=8) and non-stimulated (n=6) groups.
- Stimulation was planned for 1000 hours, with monitoring for adverse events.
Main Results:
- Adequate biotolerance to EAP materials was observed, with minimal CNC surface reactions but notable ependymal reactions.
- Surgical trauma-related lesions were identified in the CNC.
- Complications included EAP extrusion, cable breaks, and one case of an asymptomatic brainstem abscess in a stimulated animal.
Conclusions:
- Precise knowledge of CNC topography is essential to minimize surgical trauma during EAP implantation.
- External device connections may increase the risk of EAP extrusion and ascending infections.
- Long-term EAP performance is influenced by surgical technique and potential complications.