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Design of Magnetic Actuated Capsule Robot for Liquid Sampling
IEEE Transactions on Bio-Medical Engineering
|March 11, 2025
Summary
A novel biopsy capsule robot utilizes negative pressure suction for efficient digestive tract liquid sampling. This technology enhances clinical diagnosis, particularly for small intestine diseases.
Area of Science:
- Biomedical Engineering
- Gastroenterology
- Robotics
Background:
- Digestive tract diagnostics often require invasive procedures.
- Current methods for liquid sampling in the digestive tract have limitations.
Purpose of the Study:
- Introduce a novel biopsy capsule robot.
- Achieve targeted liquid sampling in the digestive tract using negative pressure.
Main Methods:
- Designed a capsule robot with a magnetic spring configuration.
- Utilized external magnetic fields for directional control and suction activation.
- Incorporated a locking mechanism to secure collected samples.
Main Results:
- Prototype dimensions: 16.3mm × 24.4mm.
- Successfully sampled liquids with viscosities from 0.7mPa s to 200mPa s.
- Achieved a maximum sample volume of 0.24ml with adequate sealing.
Conclusions:
- The capsule robot meets clinical requirements for digestive tract liquid sampling.
- This micro robot offers safe and efficient sampling, aiding in diagnosing digestive diseases.
- Potential benefits for small intestine diagnostics.
