Abstract
Recently, various studies on drug delivery and treatment in the gastrointestinal tract using capsule endoscopes have been conducted. In drug delivery and treatment using capsule endoscopy, along with rapid and accurate delivery, protecting the drug while the capsule moves to the lesion site is an important issue. In this paper, we propose a magnetically actuated capsule with an open-close mechanism for the delivery of multi-layer hemostatic microneedle (MN) patches, where the capsule can move to lesion sites via electromagnetic actuation. Through the proposed open-close mechanism, the capsule is closed to protect the MN patches during its locomotion state and is opened to protrude and deliver them to the lesion sites during its delivery state. The open-close mechanism of the capsule was validated through kinetic analysis and actuation tests. In addition, the hemostatic performance of the MN patch was verified through a blood clotting test and platelet adhesion test. Finally, in an ex-vivo test using a porcine small intestine, we demonstrated that the capsule with the open-close mechanism moved to target lesions and successfully delivered MN patches to the targets.
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This work was supported by the Korea Health Technology Development R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Korea (grant number: HI19C0642).
Jihun Lee received his B.S. degree from the School of Undergraduate Studies, Daegu Gyeongbuk Institute of Science & Technology, Daegu, Korea, in 2019, and he is currently researcher in the Department of Robotics Engineering at Daegu Gyeongbuk Institute of Science and Technology (DGIST), Korea. His research interests include microrobots and medical robots.
Sun Woo Sohn received her B.S. degree from Daegu Gyeongbuk Institute of Science & Technology, Korea. In 2020, she enrolled in Daegu Gyeongbuk Institute of Science and Technology (DGIST) as an integrated Master & Ph.D. student in the Department of Robotics Engineering. Her research interests include biomimetic microrobots for biomedical applications.
Hyoryong Lee received his B.S. degree in mechanical engineering from Kumoh National Institute of Technology, Korea in 2017. In 2017, he enrolled in Daegu Gyeongbuk Institute of Science and Technology (DGIST) as an integrated Master & Ph.D. student in the Department of Robotics Engineering. His research interests are microactuators and microrobots for biomedical applications.
Sukho Park earned his Master’s and Ph.D. degrees in mechanical engineering from Korea Advanced Institute of Science and Technology (KAIST), Korea, in 1995 and 2000, respectively. From 2000 to 2004, he worked as a senior research engineer at LG Electronics Production Research Center, Korea. From 2004 to 2006, he worked as a senior researcher of Microsystem Research Center in the Korea Institute of Science and Technology. From 2006 to 2016, he worked as a professor of the School of Mechanical Engineering at Chonnam National University and a section head of the Robot Research Initiative (RRI). In 2017, he moved to Daegu Gyeongbuk Institute of Science and Technology (DGIST), where he is now a full professor in the Department of Robotics Engineering. His research interests are microactuator, micro/nano robot, and micro/nano manipulation for biomedical instrumental applications.
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Lee, J., Sohn, S.W., Lee, H. et al. Open-close Mechanism of Magnetically Actuated Capsule for Multiple Hemostatic Microneedle Patch Delivery. Int. J. Control Autom. Syst. 20, 2285–2296 (2022). https://doi.org/10.1007/s12555-021-0306-7
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DOI: https://doi.org/10.1007/s12555-021-0306-7