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Related Concept Videos

Magnetic Force01:18

Magnetic Force

In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
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Related Experiment Video

Updated: Jun 30, 2026

Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
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Magnetically Driven Biopsy Capsule Robot with Spring Mechanism.

Md Harun Or Rashid1, Feng Lin1,2

  • 1School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China.

Micromachines
|February 24, 2024
PubMed
Summary
This summary is machine-generated.

A new wireless capsule endoscope (CE) with active locomotion and a biopsy function has been developed. This needle-based biopsy capsule robot (NBBCR) enables precise tissue sampling for improved gastrointestinal diagnostics.

Keywords:
active locomotionbiopsycapsule robotelectromagnetic actuation system

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Area of Science:

  • Biomedical Engineering
  • Gastroenterology
  • Robotics

Background:

  • Capsule endoscopes (CEs) are limited to image capture, restricting advanced diagnostic capabilities.
  • Tissue sampling is a crucial diagnostic procedure not yet integrated into CE technology.
  • Active locomotion in capsule robots offers enhanced control and functionality.

Purpose of the Study:

  • To develop a novel wireless capsule endoscope with active locomotion and integrated tissue sampling capabilities.
  • To design and fabricate a needle-based biopsy capsule robot (NBBCR) for precise gastrointestinal diagnosis.
  • To demonstrate the feasibility of wireless control for advanced CE functions.

Main Methods:

  • A capsule robot (CR) prototype (12 mm diameter, 32 mm length) was designed with two permanent magnets for external electromagnetic actuation (EMA).
  • An integrated spring-loaded biopsy mechanism with a needle capable of ~5 mm extrusion was incorporated.
  • In vitro experiments were conducted to evaluate the CR's locomotion control and biopsy mechanism actuation.

Main Results:

  • The NBBCR prototype demonstrated precise wireless control with translation speeds of 2 mm/s (x-direction) and 3 mm/s (y-direction).
  • The biopsy mechanism successfully achieved the desired extrusion of approximately 5 mm for tissue sampling.
  • The camera module enabled target detection and observation of the biopsy process on simulated lesions.

Conclusions:

  • The developed active locomoted, untethered NBBCR successfully integrates wireless control, precise locomotion, and biopsy functionality.
  • This technology advances capsule endoscopy by enabling extended diagnostic procedures beyond simple imaging.
  • The NBBCR holds significant potential for improving clinical applications in gastrointestinal disease diagnosis.