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Stopping mechanism for capsule endoscope using electrical stimulus

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Abstract

An ingestible capsule, which has the ability to stop at certain locations in the small intestine, was designed and implemented to monitor intestinal diseases. The proposed capsule can contract the small intestine by using electrical stimuli; this contraction causes the capsule to stop when the maximum static frictional force (MSFF) is larger than the force of natural peristalsis. In vitro experiments were carried out to verify the feasibility of the capsule, and the results showed that the capsule was successfully stopped in the small intestine. Various electrodes and electrical stimulus parameters were determined on the basis of the MSFF. A moderate increment of the MSFF (12.7 ± 4.6 gf at 5 V, 10 Hz, and 5 ms) and the maximum increment of the MSFF (56.5 ± 9.77 gf at 20 V, 10 Hz, and 5 ms) were obtained, and it is sufficient force to stop the capsule.

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Abbreviations

MSFF:

Maximum static frictional force

CIF:

Common image format ((352 × 288) resolution)

ESC:

Electrical stimulus capsule

SUS316L:

Low carbon stainless

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Acknowledgment

This work was supported by grant No. 10031779 from the Strategic Technology Development Program of Ministry of Knowledge Economy. Also, this work was supported by the Grant of the Korean Ministry of Education, Science and Technology (The Regional Core Research Program/Anti-aging and Well-being Research Center).

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Authors and Affiliations

  1. School of Electrical Engineering and Computer Science, Kyungpook National University, Kyungpook, South Korea

    Sang Hyo Woo & Jin Ho Cho

  2. Department of Physiology, College of Veterinary Medicine, Kyungpook National University, Kyungpook, South Korea

    Tae Wan Kim

  3. Room 1009, 102 Dong, Woo Bang APT., Wall Sung Dong, Dal Sur Gu, Dae gu, 704-400, South Korea

    Jin Ho Cho

Authors
  1. Sang Hyo Woo
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  2. Tae Wan Kim
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  3. Jin Ho Cho
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Correspondence to Jin Ho Cho.

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Woo, S.H., Kim, T.W. & Cho, J.H. Stopping mechanism for capsule endoscope using electrical stimulus. Med Biol Eng Comput 48, 97–102 (2010). https://doi.org/10.1007/s11517-009-0553-x

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