Shuman He1,2, Xiuhua Chao3, Ruijie Wang3, Jianfen Luo3, Lei Xu3, Holly F B Teagle4, Lisa R Park5, Kevin D Brown5, Michelle Shannon2, Cynthia Warner2, Angela Pellittieri1, William J Riggs1,2. 1. Department of Otolaryngology - Head and Neck Surgery, The Ohio State University, Columbus, Ohio, USA. 2. Department of Audiology, Nationwide Children's Hospital, Columbus, Ohio, USA. 3. Department of Auditory Implantation, Shandong ENT Hospital Affiliated with Shandong University, Duanxing W. Rd, Huaiyin, Jinan, Shandong Province, People's Republic of China. 4. Department of Audiology, The University of Auckland, St. Johns, Auckland, New Zealand. 5. Department of Otolaryngology - Head & Neck Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Abstract
OBJECTIVES: This study reports a method for measuring the electrically evoked compound action potential (eCAP) in children with cochlear nerve deficiency (CND). DESIGN: This method was developed based on experience with 50 children with CND who were Cochlear Nucleus cochlear implant users. RESULTS: This method includes three recommended steps conducted with recommended stimulating and recording parameters: initial screen, pulse phase duration optimization, and eCAP threshold determination (i.e., identifying the lowest stimulation level that can evoke an eCAP). Compared with the manufacturer-default parameters, the recommended parameters used in this method yielded a higher success rate for measuring the eCAP in children with CND. CONCLUSIONS: The eCAP can be measured successfully in children with CND using recommended parameters. This specific method is suitable for measuring the eCAP in children with CND in clinical settings. However, it is not suitable for intraoperative eCAP recordings due to the extensive testing time required.
OBJECTIVES: This study reports a method for measuring the electrically evoked compound action potential (eCAP) in children with cochlear nerve deficiency (CND). DESIGN: This method was developed based on experience with 50 children with CND who were Cochlear Nucleus cochlear implant users. RESULTS: This method includes three recommended steps conducted with recommended stimulating and recording parameters: initial screen, pulse phase duration optimization, and eCAP threshold determination (i.e., identifying the lowest stimulation level that can evoke an eCAP). Compared with the manufacturer-default parameters, the recommended parameters used in this method yielded a higher success rate for measuring the eCAP in children with CND. CONCLUSIONS: The eCAP can be measured successfully in children with CND using recommended parameters. This specific method is suitable for measuring the eCAP in children with CND in clinical settings. However, it is not suitable for intraoperative eCAP recordings due to the extensive testing time required.
Authors: Jaime A Undurraga; Robert P Carlyon; Olivier Macherey; Jan Wouters; Astrid van Wieringen Journal: Hear Res Date: 2012-05-11 Impact factor: 3.208