ĐÁNH GIÁ MỨC ĐỘ KHÓ KHĂN CỦA PHẪU THUẬT CẤY ĐIỆN CỰC ỐC TAI VỚI ĐỘ NGẢ SAU CỦA THÀNH SAU ỐNG TAI NGOÀI

Abstract

Objective:  Compare the results the angle of posterior wall the external auditory canal on CT and surgery, thereby evaluating the influence on surgery. Methods: describing the research on 25 patients having operated cochlear. Results: The most common group is 2-6 years old acounting 48%. ABR at 90dB intensity, 17 patients without V ware, acounting for 68%, ASSR had 23 patients with average threshold over 90dB (deafness), acounting for 92%. On CT scan, the mean angle of inclination of the posterior wall the external auditory canal was 144,76⁰ with the smallest measuring angle being 126⁰, the measuring angle was large. at least 165⁰. Angle group ≥ 145⁰ on CT has the correlation between the external auditory canal reclining in surgery and the ability to display round window withp=0.003 (<0.05). Conclusion: The greater the angle of inclination behind the external auditory canal on CT 145 degrees, the more posteriorly it will affect the visibility of the round window and prolong the surgery time,increasing the risk of complications.