OBJECTIVE: To introduce a rat model for use in cochlear implant related research. METHOD: Five deafened Hooded-Wistar rats were implanted with a scala tympani electrode array using a new surgical method. Electrically evoked brainstem responses (EABRs) using bipolar stimulation were recorded and cochlear history was assessed. RESULT: Electrically evoked brainstem responses with normal configuration confirmed the functional status of the cochlear implantation. There was no evidence of severe insertion-induced damage of intra-cochlear structure. CONCLUSION The surgical method established in the rat model is a safe and effective procedure for acute or chronic cochlear implantation.
Animals ; Cochlear Implantation ; methods ; Cochlear Implants ; Evoked Potentials, Auditory, Brain Stem ; Male ; Models, Animal ; Rats ; Rats, Wistar