Effects of 'Perinatal Risk Factors Associated with Hearing Loss' on Auditory Outcomes in Cochlear Implant Recipient Children.

Cochlear implantation (CI) is used for rehabilitation of children with bilateral severe to profound permanent childhood hearing loss (PCHL). Recently, treatment of such children has been influenced by diagnostic technological advances. Children with perinatal risk factors associated with PCHL can undergo CI. The primary aim of this study was to determine the effects of 'perinatal risk factor associated with PCHL' on post-CI auditory outcomes. In this prospective study at a tertiary care centre we evaluated 50 cochlear implanted children from October 2011 to March 2013. The case group consisted of 6 (12%) children who had presence of 'perinatal risk factor associated with PCHL' and control group consisted of 44 (88%) children without any 'perinatal risk factor associated with PCHL'. All patients received auditory and speech rehabilitation and we evaluated their auditory perception outcomes by categories of auditory performance (CAP) and meaningful auditory integration scale (MAIS) scores at 1 year post-CI. There were significantly decreased mean MAIS scores (decrease of 8.6%) and mean CAP scores (decrease of 6.7%) in CI recipient children with 'perinatal risk factor associated with PCHL' as compared to those who were without any 'perinatal risk factor associated with PCHL' at 1 year after CI. However, in children with 'perinatal risk factor associated with PCHL', mean CAP & MAIS scores (auditory perception outcomes) were still more than 80% of maximum achievable CAP & MAIS scores. In this study, CI recipient children who were without any 'perinatal risk factor associated with PCHL' had significantly better mean MAIS & CAP scores (auditory perception outcomes) 1 year post-CI. However, even in children who had 'perinatal risk factor associated with PCHL', there was substantial improvement in auditory perception outcomes at 1 year post-CI and CI was still helpful in these children. Hence, knowledge of 'perinatal risk factor associated with PCHL' can provide reasonable help in predicting the auditory perception outcome and optimal counselling of families of CI candidates.