Deeper insertion of electrode array result in better rehabilitation outcomes – Do we have evidence?. (March 2016)

• Record Type: Journal Article
• Authors: Nayak, Gyanaranjan; Panda, Naresh K.; Banumathy, N.; Munjal, Sanjay; Khandelwal, N.; Saxena, Akshay
• Is Part Of: International journal of pediatric otorhinolaryngology. Volume 82(2016:Mar.)
• Page Start: 47
• Page End: 53
• Publication Date: 2016-03
• Subjects: Cochlear implantation -- Depth of insertion -- Outcome analysis -- Round window; Otolaryngology -- Periodicals; Pediatrics -- Periodicals; Otolaryngology -- Periodicals; Pediatrics -- Periodicals; Oto-rhino-laryngologie -- Périodiques; Pédiatrie -- Périodiques; 618.9209751
• DOI: 10.1016/j.ijporl.2015.12.028
• Languages: English
• ISSNs: 0165-5876

Abstract

Abstract: Objective: To study the outcome analysis in cochlear implantees in relation to depth of insertion. Methods: 30 patients of non-syndromic congenital profound hearing loss in the age range of 2–12 years received cochlear implantation by a posterior tympanotomy round window approach. Depth of insertion was calculated using post-operative X-rays (modified Stenver's view) and categorized into four groups, viz. fair insertion (Group A <180°), good insertion (Group B 180–<270°), very good insertion(Group C 270–360°), excellent insertion (Group D >360°). The outcome analysis of each implantee was carried out in a follow up interval of every 3 months using Meaningful Auditory Integration Scale (MAIS), Infant Toddler Meaningful Auditory Integration Scale (IT-MAIS), Category of Auditory Performance (CAP), and Speech Intelligibility Rating (SIR). Results: Overall 30, 29, 25, and 22 patients have completed 3, 6, 9, and 12 months follow up respectively. The MAIS scores in Group C were significantly better than Group B at 6, 9, and 12 months ( P < 0.05). The mean CAP score of Group C was more than rest of the groups with significant difference between Group C and Group D at 12 months ( P < 0.05). The mean SIR scores were maximum in Group C with significant difference between Group C and Group B at 9 and 12 months ( P < 0.05). Conclusion: The study demonstrates that insertion from 270° to 360° gives optimum hearing outcomes as compared to deeper insertion, although larger sample and long term follow-up is warranted for definite conclusions.