Prediction of round window visibility in cochlear implantation with temporal bone high resolution computed tomography
10.3760/cma.j.issn.1673-0860.2017.08.001
- VernacularTitle: 颞骨高分辨率CT对人工耳蜗植入术中圆窗暴露难易的预判
- Author:
Shuping SUN
1
;
Wei LU
1
;
Yibo LEI
1
;
Xinmeng MEN
1
;
Bin ZUO
1
;
Shaoguang DING
1
Author Information
1. Division of Otology, Otorhinolaryngology Hospital, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
- Publication Type:Journal Article
- Keywords:
Cochlear implantation;
Round window, ear;
Tomography, X-ray computed
- From:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2017;52(8):561-565
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To discuss the prediction of round window(RW) visibility in cochlear implantation(CI) with temporal bone high resolution computed tomography(HRCT).
Methods:From January 2013 to January 2017, 130 cases underwent both HRCT and CI in our hospital were analyzed. The distance from facial nerve to posterior canal wall(FWD), the angle between facial nerve and inner margin of round window(FRA), and the angle between facial nerve and tympanic anulus to inner margin of round window(FRAA) were detected at the level of round window on axial temporal bone HRCT. A line parallel to the posterior wall of ear canal was drawn from the anterior wall of facial nerve at the level of round window on axial temporal bone HRCT and its relationship with round window was detected (facial-round window line, FRL): type0-posterior to the round window, type1-between the round window, type2-anterior to the round window. Their(FWD, FRA, FRAA, FRL) relationships with intra-operative round window visibility were analyzed by SPSS 17.0 software.
Results:FWD(F=18.76, P=0.00), FRA(F=34.57, P=0.00), FRAA (F=14.24, P=0.00) could affect the intra-operative RW visibility significantly. RW could be exposed completely during CI when preoperative HRCT showing type0 FRL. RW might be partly exposed and not exposed when preoperative HRCT showing type1 and type2 FRL respectively.
Conclusion:FWD, FRA, FRAA and FRL of temporal bone HRCT can predict intra-operative round window visibility effectively in CI surgery.
