A magnetically actuated anchoring system for a wireless endoscopic capsule
A magnetically actuated anchoring system for a wireless endoscopic capsule
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DOI：
10.1007/s10544-016-0129-0
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发表时间：
2016-10
影响因子：
2.8
通讯作者：
Hao Zhou;G. Alici;F. Munoz
中科院分区：
文献类型：
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作者：
Hao Zhou;G. Alici;F. Munoz
在这项研究中，我们提出了一种新的磁驱动锚定系统的无线胶囊内窥镜（WCE）采用可切换的磁性弹簧的原则。力模型推导出预测所需的磁力，以支持锚和肠腔之间的相互作用。理论和实验分析表明，磁性弹簧能够提供启动锚定机构所需的力，锚定机构由四个可折叠的腿组成。设计、制造和测试了一个原型胶囊，其尺寸与商业WCE的尺寸相当。体外真实的小肠实验表明，该锚定机构在外加磁场作用下，能够使锚定腿与小肠内壁之间的摩擦力提高2倍以上。实验结果表明，所提出的锚定系统，其具有低的足迹，不占用太多的空间，胶囊，可以提供一个可靠的锚定能力与胶囊内的肠腔。
In this study, we propose a new magnetically actuated anchoring system for wireless capsule endoscopes (WCE) by employing the principle of a switchable magnetic spring. A force model is derived to predict the magnetic force needed to support the interaction between the anchors and the intestinal lumen. The theoretical and experimental analysis conducted shows that the magnetic spring is capable of providing the force needed to activate the anchoring mechanism, which consists of four foldable legs. A prototype capsule with a size comparable with the size of a commercial WCE was designed, fabricated, and tested. Thein-vitrotests with a real small intestine show that the proposed anchoring mechanism is able to raise the friction force between the anchoring legs and inner wall of the intestine by more than two times after its activation using an external magnetic field. Experimental results presented demonstrate that the proposed anchoring system, which has a low foot-print not taking up too much space on the capsule, can provide a reliable anchoring capability with the capsule inside the intestinal lumen.