Effects of long term use of Cochlear Implant on e-Evoked Action potential
Leila Azadeh Ranjbar . Audiologist of loghman Hakim cochlear implant center, SBMU Tehran . Iran
لیلا آزاده رنجبر. شنوایی شناس مرکز کاشت حلزون بیمارستان لقمان حکیم
Introduction
Long term use of cochlear implant affect the response of auditory nerve due to plasticity rules. The parameter of evaluation & study of νш nerve function in users of cochlear implant is e-Evoked Action potential that calls variously base on cochlear implant prothes brand such as NRT , NRI or ART. In this study we study the eEACP changes during the time
Materials and Methods
In this study we assessment the eECAP finding in 87 patients that was implanted 58-75 months later in 2 group of pediatric and adults. The brand of CI of this patients was in 2 groups: Advance Bionics , Cochlear
Results
: The results of study indicate that
ECAP Thresholds in children : decrease of eECAP thresholds (13.82 C.L) in cochlear brand
Decrease of eEAP threshold (12.63 CU) in AB brand
ECAP Threshold in Adults: decreas of eECAP threshold (8.26 C.L) in cochlear brand
(decrease of eEAP thresholds (5.13 CU)
ECAP Slope in children : shows steeper slope after time spend
ECAP slope in Adults : shows no change of slope
Conclusion
The results of study shows that long term use of cochlear implant can affect the current field of cochlear and the relation of stimulating electrode and the tissue of nerve that is stimulating by cochlear implant
Keywords: Cochlear implant . Action Potential . Adult . Child . long term