Alhabib Salman F, Almuhawas Fida, Hagr Abdulrahman, Alzhrani Farid, Hamed Nezar, Alenzi Saad, Abdelsamad Yassin, Dhanasingh Anandhan
King Abdullah Ear Specialist Center (KAESC), College of Medicine, ORL Department, King Saud University, Riyadh, Saudi Arabia.
King Fahad specialized Hospital-Tabuk, Ministry of Health, Saudi Arabia.
Ear Nose Throat J. 2025 May;104(5):NP321-NP327. doi: 10.1177/01455613221106221. Epub 2022 Jul 21.
ObjectivesTo study the changes in the coiled configuration of electrode excess lead in the mastoid cavity in the cochlear implant recipients over time.MethodsPost-operative CT scans at two different appointments of fourteen patients with cochlear implants (CI) were retrospectively analyzed using a DICOM viewer software (3D-slicer). Mastoid thickness (MT) was measured in the oblique coronal plane from the round window (RW) entrance to the mastoid edge and inter-cochlear distance (ICD) was measured in the axial plane at the fundus level between two ears. 3D segmentation of the entire inner ear of both sides and coiled electrode excess lead was performed to visually compare the changes in coiled configuration between the two CT scan time points.ResultMT and ICD increased logarithmically with the patient's age, as has been measured from both the 1st and the 2nd CT scans and a weak linear correlation between MT and ICD was observed. Growth in MT and ICT measured between the time of 1st and 2nd CT scans showed a strong linear correlation. In eight cases, changes in the electrode excess lead have been observed in the 2nd CT scan, either a change in the coiling configuration of electrode excess lead or shifted laterally toward the mastoid edge. The ICD growth between the 1st and the 2nd CT scans was >2 mm in only seven cases and all of them were children. All other six cases had no observed changes in the coiled electrode lead. In addition, the mastoid growth between the 1st and the 2nd CT scan was >2.5 mm in only 4 cases.ConclusionCoiled configuration of electrode excess lead could change when the MT and ICD increased over time.
目的
研究人工耳蜗植入受者乳突腔内电极多余导线的盘绕形态随时间的变化。
方法
使用DICOM查看软件（3D - slicer）对14例人工耳蜗植入患者在两个不同时间点的术后CT扫描进行回顾性分析。在斜冠状面从圆窗入口至乳突边缘测量乳突厚度（MT），在轴向平面于两耳底圈水平测量耳蜗间距离（ICD）。对双侧整个内耳及盘绕的电极多余导线进行三维分割，以直观比较两个CT扫描时间点之间盘绕形态的变化。
结果
从第1次和第2次CT扫描测量结果来看，MT和ICD均随患者年龄呈对数增长，且观察到MT与ICD之间存在弱线性相关性。第1次和第2次CT扫描之间测量的MT和ICT增长呈现出强线性相关性。在8例患者中，第2次CT扫描观察到电极多余导线有变化，要么是电极多余导线盘绕形态改变，要么是向乳突边缘侧向移位。仅7例患者第1次和第2次CT扫描之间的ICD增长>2 mm，且均为儿童。其他6例患者未观察到盘绕电极导线有变化。此外，仅4例患者第1次和第2次CT扫描之间的乳突生长>2.5 mm。
结论
随着时间推移MT和ICD增加时，电极多余导线的盘绕形态可能会发生改变。
