3.3 Audiological cochlear implantation outcomes
All four patients had bilateral profound HI. Early intervention with hearing aids was provided, but poor hearing was observed in all patients(Figure 2). Averaged auditory speech scores were rather low, Categories of Auditory Performance (CAP) = 1.5 , speech intelligibility rating (SIR) = 1.5, The (Infant Toddler)-Meaningful Auditory Integration Scale (IT-MAIS)= 8.25, Meaningful Use of Speech Scale (MUSS)=6.5 before surgery. Postoperatively, all patients received regular aural rehabilitation. CAP, SIR, IT-MIAS and MUSS scores were assessed to determine auditory and speech performances, which revealed improvements in all patients. Case 2 showed most satisfactory improvement (Figure 2). However, regarding SIR, and MUSS, cases 1, 3 and 4 showed relatively low scores even at almost 5 years after the surgery.