Fourteen-Years Experience with Cochlear Implantation in Ramathibodi Hospital
Lalida Kasemsuwan MD*, Wichit Cheewaruangroj MD*, Jumroon Tungkeeratichai MD*, Thongchai Bhongmakapat MD*, Cheamchit Thawin MA**, Krisna Lertsukprasert MA**, Rattinan Tiravanitchakul MA**, Rada Dara MA**, Jiraporn Laothamatas MD***
Affiliation : * Department of Otolaryngology, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand ** Audiology and Speech Division, Department of Otolaryngology, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand *** Department of Radiology, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand
Objective : To review the cochlear implant program in Ramathibodi Hospital and share experience of cochlear implantation
emphasized on clinical and surgical outcomes.
Material and Method: Retrospective review of 143 ears (140 patients) operated with cochlear implant between 1995 and
2009. The demographic data including etiology of deafness and findings from temporal bone CT scans were reviewed. The
authors’ experience with cochlear implant surgery in terms of patient selection, patient advisory clinic, necessary equipment,
pre- and postoperative evaluations, surgical techniques and complications were discussed.
Results : Most congenital origin was unknown etiology and congenital rubella was the most common known cause. From the
CT scans of congenital deafness, vestibular aqueduct dilatation was the most common and found in 29.31% while Mondini
malformation was shown to be 16.37%. The authors’ surgical technique of using the pocket method and designed bony ridge
at cortical mastoid rim had helped stabilizing the implant and electrode fancoil. During the last two years, no complication or
revision surgery was detected.
Conclusion : Cochlear implant surgery in both children and adults can result in good surgical outcome and fewer complications
under experienced surgeons and a good team.
Keywords : Cochlear implant, CT scans of temporal bone, Cochleostomy, Hearing loss
