Garaycochea O, Manrique-Huarte R, Lazaro C, et al. - Via retrospectively selecting patients from the cochlear implant program database, researchers compared the surgical and audiological outcomes with two perimodiolar electrode arrays (Nucleus 512-Contour Advance® y Nucleus 532-Slim Perimodiolar) and a straight electrode array (Nucleus 422/522). Included were only patients with a history of bilateral, sensorineural postlingually profound hearing loss who had cochlear implant surgery with either a N512, a N532 or a N422. The study sample consisted of 66 patients (19-CI532, 20-CI512 and 27-CI422). With N532, N512 and N422, the most common type of cochlea access were through an extended round window, a promontorial cochleostomy, and a pure round window, respectively. No significant differences in Mean PTA and Speech recognition are found after 12 months. However, in the group of patients treated with the CI N532, faster acquisition of auditory results have been observed. The type of electrode array affects the cochleostomy type.