Moving of a Magnetic Actuator for a Capsule Endoscope in the Intestine of a Pig

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  • Chiba A.
    Research Institute of Electrical Communication, Tohoku University
  • Sendoh M.
    Research Institute of Electrical Communication, Tohoku University
  • Ishiyama K.
    Research Institute of Electrical Communication, Tohoku University
  • Arai K.I.
    Research Institute of Electrical Communication, Tohoku University

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Other Title
  • ブタ腸内におけるカプセル内視鏡用磁気アクチュエータの駆動
  • ブタ チョウ ナイ ニ オケル カプセル ナイシキョウヨウ ジキ アクチュエータ ノ クドウ

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Abstract

Application of a magnetic actuator to a capsule endoscope is proposed. Capsule-type magnetic actuators were fabricated and their motion properties were investigated in a silicone tube and in the intestine of a pig. The dummy capsule is 11 mm in diameter and 40 mm in length. This magnetic actuator is composed of a permanent magnet inside the dummy capsule and spiral structures outside it. The permanent magnet is magnetized in the direction of the diameter. When a rotational magnetic field is applied, the magnetic actuator rotates and moves wirelessly. The velocity of capsules with top spirals was examined in a silicone tube. In addition, a motion test was conducted in the intestine of a pig. The actuator can pass through the small and the large intestines over distances of 450 mm and 400 mm, respectively, in less than 150 s. The capsule can pass out of the bag-shaped section of the large intestine. This result shows that the actuator has the potential to be used in the guidance system of a capsule endoscope.

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