Abstract: Abstract Objective：Through fourteen cases of the clinical data of the infant patients who are implanted cochleae, this paper explores the surgical indication, operation method, and application results.Method: All the fourteen bilateral severe or profound sensorineural deaf infant patients, enrolled in our department from October, 2003 to October , 2009, were implanted multichannel cochlea through mastoidectomy with posterior tympanotomy approach.Results: The artificial cochleae are implanted into all the fourteen infant patients successfully and the wounds heal well. And no such complications as flap infection and necrosis, implantation materials silicagel allergy, facial nerve scathe and facial nerve stimulation occurred. The examinations during the operation and the response after the implantation are normal. After normal debugging, the infant patients start language rehabilitation training at deaf children center and their abilities of speech discrimination and communication improve greatly than before.Conclusion: Infant mastoidectomy with posterior tympanotomy approach cochlear implantation is effective in the treatment of profound sensorineural deafness. It is especially safe and causes no complications in the operation on Mondini malformation and large vestibular aqueduct syndrome.

Key words: Cochlear implantation, infant, mastoidectomy with posterior tympanotomy