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복합부위통증증후군 제I형 환자에서 조기 척수자극술이 필요한가? -증례보고-
민형기,한경림,이상은,김경태,김찬,Min, Hyoung Ki,Han, Kyung Ream,Lee, Sang Eun,Kim, Kyoung Tae,Kim, Chan 대한통증학회 2006 The Korean Journal of Pain Vol.19 No.2
Complex regional pain syndrome (CRPS) is clinically characterized by pain, abnormal regulation of blood flow and sweating, edema of skin and subcutaneous tissues, sensory and motor disturbances, and trophic changes of the skin. A 21-year-old man was suffering from pain and swelling in his right hand and forearm. His arm had been in splints for 3 weeks following an extension injury of the right fingers and wrist, with the pain having developed 2 weeks after the splinting. He was treated with various nerve blocks including continuous epidural infusion, thoracic sympathetic block and peripheral nerve blocks, and squeezing his edematous region under general anesthesia as well as intravenous lidocaine and ketamine infusions. However, all of the performed treatments had no effect on the patient's pain or hand swelling. As a next line therapy, spinal cord stimulation should be considered because of intractable severe pain and swelling to almost all other modalities of therapy. We therefore performed an early intervention of spinal cord stimulation for the patient with refractory CRPS type I 5 months after the onset of pain and have got an excellent result.
다수의 불규칙 공동을 갖는 광주의 안정성에 관한 수치해석
민형기,임한욱 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.A
A room and pillar mining method has been adopting at the Jeungsun limestone mine . To check stability of pillar with multiple and irregular openings, the size, shape and spacing of nb pillar were first designed using some empirical suggestions. The Finite Difference Method(FDM)was used to analyze the pillar stability. Twelve different cases with the variation of K(horizontal/vertical stress)values, different height and different spacing of pillar were used in this study. Finally Mohr-Coulomb criterion was adopted to calculate the safety factors. Horizontal and vertical displacement. maximum and minimum principal stresses, range of plastic zone and safety factors were calculated at each case. As a result of analysis, the size of one block is 160m long, 70m wide, 40m high with 20m wide rib pillar and 20m square column pillar. The overall recovery at this case can be estimated about 40%.