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Related Concept Videos

Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

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Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers,...
159

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Active distance control in multi-capsule endoscopy via closed loop electromagnetic force between capsules.

Furkan Peker1, Onur Ferhanoğlu2

  • 1Faculty of Electrical and Electronics Eng., Department of Electronics and Communication Eng., Istanbul Technical University, Maslak, Istanbul, 34469, Turkey. pekerf@itu.edu.tr.

Medical & Biological Engineering & Computing
|December 29, 2023
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Summary

This study introduces multi-capsule endoscopy, using magnetic control for synchronized capsule navigation. Experiments demonstrate precise inter-capsule distance control, enabling future advancements in gastrointestinal imaging.

Keywords:
Biomedical device designClosed-loop designFinite element method analysisGastrointestinal treatmentMagnetic force interaction

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Area of Science:

  • Biomedical Engineering
  • Gastroenterology
  • Robotics

Background:

  • Capsule endoscopy offers non-invasive gastrointestinal imaging but single capsules have limited multifunctionality due to size constraints.
  • Multi-capsule endoscopy proposes collaborative, individually functional capsules for enhanced capabilities.
  • Synchronized navigation is critical for effective multi-capsule endoscopy.

Purpose of the Study:

  • To develop and validate an active distance control strategy for synchronized navigation in multi-capsule endoscopy.
  • To enable precise inter-capsule spacing for collaborative capsule function.

Main Methods:

  • A closed-loop system with a magnetic sphere and solenoid was designed for active distance control.
  • A Simulink model incorporated peristalsis, PID control, magnetic forces, and position tracking.
  • Hall effect sensors and a PID controller regulated solenoid current to maintain desired capsule spacing.

Main Results:

  • Proof-of-concept experiments achieved precise inter-capsule distances (1.94 ± 0.097 mm and 0.97 ± 0.28 mm) in phantoms and ex vivo tissues.
  • The system successfully mimicked human peristalsis speeds (1 cm/min).
  • Demonstrated accurate control of capsule spacing, crucial for multi-capsule systems.

Conclusions:

  • The developed active distance control strategy enables precise inter-capsule synchronization for multi-capsule endoscopy.
  • This technology is a significant step towards realizing the potential of advanced, collaborative capsule-based gastrointestinal diagnostics.
  • Further research in multi-capsule endoscopy can lead to improved diagnostic and therapeutic interventions.