Evaluation of Cochlear Implantation in Unilateral or Asymmetric Hearing Loss in Children.

During surgery at 8 weeks after inclusion, cochlear implant is implanted

At 8 weeks after inclusion, CROS or BICROS (depending on the type of hearing loss) is fitting

The FraSimat is an adaptive test that measures speech intelligibility in noise. It consists of 14 sentences of 3 words each, recorded in the presence of background noise. The FraSimat will be performed in two different configurations in relation to the source of the signal and noise before implantation or fitting, and 1, 2, 3 and 4 months after.

"ERKI for German Erfassung des Richtungshörens für Kinder is an automated test that assesses spatial localization skills. The test is performed with the child seated facing a semi-circular table, surrounded by a set of 5 loudspeakers arranged 1 meter apart.~The test consists of 5 stimuli, followed by 42 trials. Following the presentation of each stimulus, the child must turn a control knob and direct the LED light to the point where he or she has perceived it. The child validates his or her response by pressing the button.~ERKI is evaluated before implantation or fitting, and 1, 2 and 3 months after."

"The recording of Auditory Cortical Evoked Potentials provides an objective means of assessing the maturation of the auditory system and its ability to process auditory signals. AEPs consist of a series of cortical responses to an auditory stimulus.~PEAc are assessed using a non-invasive EEG recording, made under quiet wakefulness. Four surface electrodes are glued to the patient's skull: one on the vertex, one on the forehead, and one on each mastoid. The latency (msec) and amplitude (mV) values of each of the four component waves will be analyzed.~PEAc is evaluated before implantation or fitting, and 3 and 4 months after."

"The Speech, Spatial and Qualities of Hearing Scale is a questionnaire for subjective evaluation of listening performance in everyday listening situations. The parent version is adapted for parents of hearing-impaired children.~SSQ is evaluated before implantation or fitting, and 4 months after."

"Peabody Picture Vocabulary Scale assesses the extent of French listening vocabulary acquired by the child.~The PPVT is designed for patients aged from 2 years and 6 months to 18 years. The raw score is the number of images correctly identified.~Peabody Picture Vocabulary Scale is evaluated before implantation or fitting, and 4 months after."

"The NEPSY-II (A Developmental Neuropsychological Assessment) is a battery of neuropsychological tests designed to assess children's skills in 6 major neuropsychological domains. The various tests are validated for the age range indicated in brackets, and will be used for patients aged 5 and over.~NEPSY-II is evaluated before implantation or fitting, and 4 months after."

PedsQL MFS is a questionnaire used to assess subjective experiences of fatigue. The questionnaire consists of 18 items The parent version is adapted for parents of hearing-impaired children. PedsQL MFS is evaluated before implantation or fitting, and 4 months after.