Wang Xiaona, Meng Max Q H, Chen Xijun
Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong.
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:4375-8. doi: 10.1109/IEMBS.2010.5627100.
Gastrointestinal (GI) disorder is one of the most common diseases in human body. The swallowable wireless capsule endoscopy has been proved to be a convenient, painless and effective way to examine the whole GI tract. However, lack of motion control makes the movement of the capsule substantially random, resulting in missing diagnosis. In this paper, a locomotion mechanism is developed for the next-generation active capsule endoscope. An internal actuator integrated on-board the capsule is designed to provide driving force and improve the dexterity. A small permanent magnet enclosed inside the capsule interacts with an external magnetic field to control the capsule's orientation and offer extra driving force. This mechanism avoids sophisticated and bulky control system and reduces power consumption inside the capsule. Ex-vivo experimental results showed that it can make a controllable movement inside the porcine large intestine. The mechanism also has the potential to be a platform for further development, such as devices of operations, spraying medicine, biopsy etc.
胃肠道（GI）疾病是人体最常见的疾病之一。可吞咽无线胶囊内窥镜已被证明是一种检查整个胃肠道的便捷、无痛且有效的方法。然而，由于缺乏运动控制，胶囊的运动基本上是随机的，导致漏诊。本文为下一代主动式胶囊内窥镜开发了一种运动机制。集成在胶囊内的内部致动器旨在提供驱动力并提高灵活性。封装在胶囊内的一个小永磁体与外部磁场相互作用，以控制胶囊的方向并提供额外的驱动力。这种机制避免了复杂且庞大的控制系统，并降低了胶囊内部的功耗。体外实验结果表明，它可以在猪的大肠内进行可控运动。该机制还有潜力成为进一步开发的平台，例如手术器械、喷雾给药、活检等设备。
