Du Qiang, Wang Zheng-min
Department of Otorhinolaryngology Head and Neck Surgery, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai 200031, China.
Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2009 Jun;44(6):514-8.
To develop a new method for REZ-1 cochlear implant electrode array insertion.
REZ-1 cochlear implant electrode array was implanted in 22 human temporal bone specimens. Cochlear diameters were measured from spiral CT scan before implantation. Cochlear views were taken before and after pullback technique. Modiolus-electrode distances were measured and compared. The diameters of sixty normal cochleae were measured.
In 3 cases, 27 electrode rings were inserted into the cochlea, while in others, all 28 electrode rings were inserted into the cochlea. After pullback of the electrode array, No. 12 to No. 19 electrode rings were closer to the modiolus in 17 cases (paired t test, P<0.01). The cochlear diameters in the 17 cases were smaller than 9.50 mm, while in the other 5 cases, the cochlear diameters were at least 9.60 mm. The cochlear diameters in the 17 cases were 9.11 (0.57) mm, while the cochlear diameters in the 5 cases were 9.78 (0.28) mm (Mann-Whitney test, P<0.001). The diameters of normal cochleae were (9.04 +/- 0.45) mm, with 90% larger than 9.50 mm.
In cases whose cochlear diameter is smaller than 9.50 mm, pullback technique can help some electrode rings be closer to the modiolus. Measurement of the cochlear diameter can help the surgeon to have a better choice in the selection of REZ-1 cochlear implantation methods.
研发一种用于REZ - 1人工耳蜗电极阵列植入的新方法。
将REZ - 1人工耳蜗电极阵列植入22个人类颞骨标本中。植入前通过螺旋CT扫描测量耳蜗直径。在采用回撤技术前后拍摄耳蜗图像。测量并比较蜗轴与电极的距离。测量60个正常耳蜗的直径。
3例中，27个电极环插入耳蜗，而在其他病例中，所有28个电极环均插入耳蜗。电极阵列回撤后，17例中第12至19个电极环更靠近蜗轴（配对t检验，P<0.01）。这17例的耳蜗直径小于9.50mm，而其他5例的耳蜗直径至少为9.60mm。17例的耳蜗直径为9.11（0.57）mm，5例的耳蜗直径为9.78（0.28）mm（曼 - 惠特尼检验，P<0.001）。正常耳蜗的直径为（9.04±0.45）mm，90%大于9.50mm。
在耳蜗直径小于9.50mm的病例中，回撤技术可使部分电极环更靠近蜗轴。测量耳蜗直径有助于外科医生在选择REZ - 1人工耳蜗植入方法时做出更好的选择。
