Journal of Computational Applied Mechanics

An internally-actuated mechanism for endoscopic capsules to reduce capsule retention: proof of concept

Document Type : Research Paper

Authors

1 School of Mechanical Engineering, College of Engineering, Tehran University, Tehran 14399-57131, Iran

2 Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Abstract

Endoscopic capsules are the only medical diagnosis devices that can examine the small intestine entirely. However, capsule retention is a critical side-effect of endoscopic capsules, which has remained unsolved. We aimed to reduce capsule retention probability by controlling the capsule’s orientation. In this research, a novel endoscopic capsule equipped with two internal electric motors is designed. This design concept is based on the capsule’s actuation using its motors’ reaction torques. The theoretical procedure and simulation show that the capsule could not reach every orientation using only one internal motor. It is shown that an orientation-controllable capsule needs two motors, which are necessary and sufficient for controlling the orientation of the active capsule in the intestine. Computer simulations and experiments have proven the desired performance and realization of the actuation mechanism. The developed actuation tool can align the capsule with the intestine; thus, the retained capsule can escape from where it is blocked.

Keywords

Main Subjects

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Journal of Computational Applied Mechanics
Volume 55, Issue 4
October 2024
Pages 717-729
  • Receive Date: 12 April 2024
  • Revise Date: 14 July 2024
  • Accept Date: 19 August 2024