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Abstract
since its clinical introduction over 25 years ago . cochlear implantion has revolutioniced the way in which otolary ngologisist treat severe to profound sensorinerural hearing loss. its benefites are well documented in the paediatric and adult population. the north wales adult programme was establishede in1990. gin clwyd hospital was the first hospital in 1990 . glan clwyd hospital; was first hospital in wales to undrtake cochlearimplant surgery .