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김도원,정상립,서기석 대한피부과학회 1982 大韓皮膚科學會誌 Vol.20 No.1
Dermatomyositis is a disease mainly of the skin, muscle and blood vessels in which erythematous and edematous changes in the skin are associated with muscle weakneas and inflammation. In adult the disease is commonly associated with underlying malignancy or reticulosis. A 23 year-old male had generalized weakness, intermittent fever, myalgia and purplish red patches on the face. Diagnosis of dermatomyositis was established by clinical manifestations, electromyogram, histologic findings of skin and muscle. He was treated with systemic steroid, with some improvement. Seven months after the onset of dermatomyositis, ecchymoses was noted on the eyelids and forearms. Bone marrow aspiration showed many immature lymphoblasts, characteristic of acute lymphocytic leukemia, He was treated with systemic steroid and vincristine, but no favorable effect was noted. He died of sepsis due to retal abscess on the 34th day in the hospital.
김도원,이동규,조승건,이보인,김병규 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.11
Previously developed robotic colonoscopes have difficulties in performing diagnostic procedures since they should be performed byexperienced endoscopists to control the device efficiently. In the previous study, therefore, we presented a robotic colonoscope adoptingan electric motor in the body to rotate elastic caterpillars. However, the installed small motor, due to the limitation of the robot size, limitedvelocity and thrust force. In addition, the electrical short can occur when it is operated in the watery lumen of a pig colon. Therefore,in this paper, we present a robotic colonoscope based on elastic caterpillars which are activated by an external motor through a flexibleshaft. Since it uses a high power motor, it enables faster self-locomotion in the colon and to prevent short circuits. First of all, we investigatedthe velocity of the robot according to thrust force and torque from the flexible shaft generated by the motor which influences therobot performance. In preliminary tests, the robot performance was tested in various radii of the acrylic pipes and a latex tube. After obtainingpromising results in the artificial colon, we carried out the ex-vivo test by using an excised pig colon. Conclusively, the robotshowed the reliable locomotion performance of about 2.58 cm/s without causing any mucosal injury of the colon.