A novel holding mechanism for next generation active wireless capsule endoscopy

This paper proposes that next generation wireless capsule endoscopy (WCE) technology will feature active mechanical components (i.e. actuated) as opposed to current systems that are predominantly passive (e.g. for imaging purposes). Future systems will integrate microsystems that use micro-actuators to, for example, perform micro-surgery, take tissue samples, deliver medication, etc. In this paper we detail a novel, ultra-compact integrated mechanism for resisting peristalsis and describe how this can be fabricated in Nylon 6 using CNC milling. The holding action is achieved by extending an “anchor” spanning an effective 60.4mm circumference, for a 11.0mm diameter WCE. This function is achieved by a mechanism that occupies only 347.0mm³ volume, including mechanics and actuator. This shows how exploiting conventional manufacturing processes can result in a radical change in the capabilities of WCE systems and empower the next generation of active devices.