Kim, Young-Tae Kim, Dae-Eun Yang, Sungwook Yoon, Eui-Sung 2024-01-20T09:34:22Z 2024-01-20T09:34:22Z 2021-09-04 2014-06 1387-2176 https://pubs.kist.re.kr/handle/201004/126761 During the last several years, legged locomotive mechanism has been considered as one of the main self-propelling mechanisms for future endoscopic microrobots due to its superior propulsion efficiency of an endoscopic microrobot inside the intestinal track. Nevertheless, its clinical application has been largely limited since the legged locomotive mechanism utilizes an end effector which has a sharp tip to generate sufficient traction by physically penetrating and interlocking with the intestinal tissue. This can cause excessive physical tissue damage or even complete perforation of the intestinal wall that can lead to abdominal inflammation. Hence, in this work two types of new end effectors, penetration-limited end effector (PLEE) and bi-material structured end effector (BMEE) were specially designed to acquire high medical safety as well as effective traction generation performance. The microscopic end effector specimens were fabricated with micro-wire electric discharge machining process. Traction generation performance of the end effectors was evaluated by direct measurement of resistance forces during contact-sliding tests using a custom-built contact-sliding tester. The safety of the end effector design was evaluated by examination of microscopic intestinal tissue damage using a scanning electron microscope (SEM). Physical damage characteristics of the intestinal tissue and related contact physics of the end effectors were discussed. From the results, the end effectors were evaluated with respect to their prospects in future medical applications as safe end effectors as well as micro-surgical tools. English SPRINGER CAPSULE ENDOSCOPE Design of endoscopic micro-robotic end effectors: safety and performance evaluation based on physical intestinal tissue damage characteristics Article 10.1007/s10544-014-9843-7 1 BIOMEDICAL MICRODEVICES, v.16, no.3, pp.397 - 413 BIOMEDICAL MICRODEVICES 16 3 397 413 scie scopus 000335656700007 2-s2.0-84904153709 Engineering, Biomedical Nanoscience & Nanotechnology Engineering Science & Technology - Other Topics Article CAPSULE ENDOSCOPE Endoscopic microrobot Gastrointestinal cancer Large intestine Microsurgery Micro-surgical tool Tissue damage