These findings may ultimately have an impact on hearing and neural preservation cochlear implant surgeries. Future studies should more clearly define the surgical anatomy of this region for appropriate placement of a scala tympani cochleostomy. The bony labyrinth (including the scala vestibuli and scala tympani). This survey clearly documents marked variations in surgical techniques for scala tympani cochlear implantation. The cochlea is a spiral shaped, bony organ enclosing a membranous region, the cochlear duct. Cochleostomy size and location appeared to be influenced by surgical experience and whether or not the round window overhang was drilled off. About 20% of surgeons selected cochleostomy locations superior to the round window membrane. Landmark identification and preferred cochleostomy locations varied greatly. The electrode array is typically inserted into the scala tympani (ST) chamber of the cochlea, in the inner ear, which is a hollow spiral-shaped chamber within. Returned questionnaires were electronically processed and evaluated.įifty-five (75%) of 73 returned surveys had adequate data validity and availability. The scala vestibuli and scala tympani, which are filled with perilymph, communicate with each other through an opening at the apex of the cochlea, called the helicotrema, which can be seen if the cochlea is sliced longitudinally down the middle. Images of trans-facial recess approaches to the round window and cochlear promontory were used in a multiple-choice fashion to assess the surgeon's typical exposure and cochleostomy location. Participants were asked to anonymously identify their routine surgical practices. for hearing occurs in the organ of Corti, which is situated in the scala media en separated from the scala vestibuli and the scala tympani New Arrivals. To assess current surgical techniques for scala tympani cochlear implantation among North American surgeons.Ī survey was distributed to all cochlear implant surgeons participating in the 2006 William House Cochlear Implant Study Group in Toronto, Canada. This study presents a systematic investigation of the influence of different geometrical parameters of the scala tympani on the cochlear implant insertion force.
0 kommentar(er)
