School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut, India.
Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, India.
Laryngoscope. 2024 Mar;134(3):1388-1395. doi: 10.1002/lary.30966. Epub 2023 Aug 16.
Cochlear implantation is the most successful approach for people with profound sensorineural hearing loss. Manual insertion of the electrode array may result in damaging the soft tissue structures and basilar membrane. An automated electrode array insertion device is reported to be less traumatic in cochlear implant surgery.
The present work develops a simple, reliable, and compact device for automatically inserting the electrode array during cochlear implantation and test the device to observe intracochlear pressure during simulated electrode insertion.
The device actuates the electrode array by a roller mechanism. For testing the automated device, a straight cochlea having the dimension of the scala tympani and a model electrode is developed using a 3D printer. A pressure sensor is utilized to observe the pressure change at different insertional conditions.
The electrode is inserted into a prototype cochlea at different speeds without any pause, and it is noticed that the pressure is increased with the depth of insertion of the electrode irrespective of the speed of electrode insertion. The rate of pressure change is observed to be increased exponentially with the speed of insertion.
At an insertion speed of 0.15 mm/s, the peak pressure is observed to be 133 Pa, which can be further evaluated in anatomical models for clinical scenarios.
N/A Laryngoscope, 134:1388-1395, 2024.
人工耳蜗植入术是治疗重度感音神经性听力损失患者最成功的方法。手动插入电极阵列可能会损伤软组织结构和基底膜。据报道，自动电极阵列插入装置在人工耳蜗植入术中的创伤性较小。
本研究开发了一种简单、可靠、紧凑的装置，用于在人工耳蜗植入术中自动插入电极阵列，并测试该装置在模拟电极插入过程中观察到的耳蜗内压力。
该装置通过滚轮机构驱动电极阵列。为了测试自动化装置，使用 3D 打印机开发了具有鼓阶尺寸和模型电极的直耳蜗。利用压力传感器观察不同插入条件下的压力变化。
在没有任何停顿的情况下，以不同的速度将电极插入原型耳蜗，并且注意到无论电极插入速度如何，电极插入的深度都会增加压力。观察到压力变化率随插入速度呈指数增加。
在插入速度为 0.15mm/s 时，观察到的峰值压力为 133Pa，可以在解剖模型中进一步评估临床情况。
无喉科，134:1388-1395,2024。
