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권칠수,안종국,김용욱,김진혁,정병현,성열보,강재철 인제대학교 1995 仁濟醫學 Vol.16 No.4
대퇴골 간부 골절시 교합성 골수강내 금속정을 이용한 견고한 고정은 조기 관절 운동과 조기 체중부하가 가능한 보편적인 수술적 치료방법으로 그 사용이 증가하고 있다. 그리고 최근에는 골수강내 금속정이 대퇴골 간부 골절 뿐만 아니라 대퇴골의 근위부나 원위부에 치우친 골절이나 청소년기의 대퇴골 간부 골절의 치료에도 확대되고 있다. 본 논문은 대퇴골 골절 환자 54례를 대상으로 금속정 삽입술의 적응증의 확대와 그에 수반되는 문제점에 관하여 증례 분석 및 결과를 문헌 고찰과 함께 보고하고자 한다. The rigid internal fixation of femur shaft fracture with intramedullary nailing enables early joint motion and weight bearing. This procedure has been used with wide popularity because it is possible simultaneously to preserve the range of motion and to obtain the bone union. But in the proximal and distal femur fracture, the interlocking screws are too close to the fracture site, the rigid fixation cannot be achieved and when early weight bearing is permitted, failure of the metal is possible. Also, when femur fractures in the adolescence be treated with traction followed by casting, sometimes angular deformity and shortening may develope. These problems have solved to the use by intramedullary nailing. The authors reviewed and analyzed 54 cases of the fractures of femur treated by interlocking nails at Sang-Gye Paik Hospital from August 1989 to July 1992. The results were as follows ; 1.Among the 54 patients, male were 42 and female were 12. 2.The mean time of bone union was 19.3 weeks. 3.The authors usually used the closed locked nailing technique to fix the mid-shaft fracture of femur. In cases such as mid-shaft fracture combined wish proximal or distal femoral fracture, for the stability of fracture and the early mobilization, a reconstruction nail or modified nailing technique was used and an excellent bone union was obtained without any complication. 4.In a mid-shaft fractures of the femur in adolescents or young adult, the authors used interlocking nails of proper length or diameter by cutting-off the distal portion of the nail or by over-reaming of the too narrow medullary canal, and the outcome was favorable.
김동수,염재광,권칠수,정병현,안종국,성열보,정형진,황순호 대한골절학회 2000 대한골절학회지 Vol.13 No.1
Purpose: This study analyzed clinical and biomechanical data from patients with elbow fracture dislocation to correlate long-term objective result with the specific injury type and treatment rendered. This can provide a basis for the management of this difficult injuries. Materials and Methods: Fifteen patients with elbow dislocation were studied from October, 1992 to October, 1997 in Sang-Gye Paik Hospital. The average duration of follow up was 4.2 years. Results: On the basis of an objective functional grading score that included elements of pain, motion, strength, and stability, the results were excellent in five(33%), good in five(33%), fair in one(7%), poor in four(27%). Prolonged immobilization greater than four weeks was associated with poor results. The results were closely related to the combined injuries and duration of immobilization. In case of radial head fractures, the best result was obtained in patients with Mason type II fractures treated by open reduction and internal fixation using Herbert screw and early complete radial head excision. Summary and Conclusion: The most common combined injury is radial head fracture. Early complete radial head excision and encouraging early ROM had more satisfactory result than delayed radial head excision or internal fixation for Mason type III fracture.
김동수,정형진,강봉균,권칠수,성열보,안종국,김진혁,정병현,정국진 대한골절학회 1999 대한골절학회지 Vol.12 No.2
Avulsion of the tibial tubercle is an uncommon physeal injury. Complications from this fracture have rarely been reported and seldom affect the long-term outcome. Three adolescent boys who sustained avulsion fracture of the tibial tubercle, were complicated by compartment syndrome and treated at Inje University Sang-Gye Paik Hospital from September 1989 to February 1995. Injury to the soft tissue surrounding the tibial tubercle avulsion may be more extensive than is usually appreciated. The anatomy of the proximal tibia and the tibial tubercle with nearby branches of the anterior tibial recurrent artery suggest a predisposing factor for the development of compartment syndrome. So, compartment syndrome should be added to the list of possible complications of this type of fracture.
Induction Heating PWM High Frequency Inverter using New Active Auxiliary Resonant Snubber
Sang-Pil Mun,Chil-Ryong Kim,Jong-Kurl Lee,Hong-Sin Kim,Sang-Hwa Jung,Soon-Kurl Kwon 한국조명·전기설비학회 2008 조명·전기설비학회논문지 Vol.22 No.3
This research presents a new active auxiliary resonant snubber with for induction heating PWM high frequency inverter solving the problem of induction heating PWM high frequency inverter circuit which is using widely in the practical application of an induction heating apparatus, the soft switching operation and power control are impossible when the lowest power supply in the active auxiliary resonant snubber with for induction heating PWM high frequency inverter. The inverter circuit which is attempted by the on-off operation of a switch has the effect of reducing the power loss due to soft switching and high frequency switching. This confirms that power regulation is possible on a continuous basis from 0.25[kW] to 2.84[kW] where the duty factor (D) changes from 0.08 to 0.3 under zero current switching which operates by an asymmetrical pulse width modulating control. The power conversion efficiency is 95[%]. Due to these results, the active auxiliary resonant snubber for an induction heating PWM high frequency inverter is considered effective as a source of induction heating.
Sang Chul Shim,Young Gil Kwon,Chil Hoon Doh,Byung Won Woo,Jin Ook Baeg,Hong Seok Kim,Tae Jeong Kim,Dong Ho Lee,Young Woo Kwak,Jin Soon Cha,Hyung Soo Lee,Jae Kook Uhm,Young Bae Park Korean Chemical Society 1990 Bulletin of the Korean Chemical Society Vol.11 No.2
Ethanolic tetra carbonylhydridoferrate solution combined with dialdehyde (no of carbon; 4,5,6) is very efficient for the selective transformation of amino group into N-heterocyclic compound. However, a large variety of both aliphatic and aromatic amines react with the ferrate-pimelaldehyde at room temperature under an atmospheric pressure of carbon monoxide to give the corresponding N-(cyclohexylmethyl)-N-alkyiamine derivatives in moderate yields instead of the corresponding N-substituted perhydroazocine derivatives.
Sang-Pil Mun,Chil-Ryong Kim,Jong-Kurl Lee,Man-Kyu Park,Soon-Kurl Kwon 한국조명·전기설비학회 2008 조명·전기설비학회논문지 Vol.22 No.3
This paper presents a simple circuit topology of the auxiliary active quasi-resonant DC link snubber-assisted three phase voltage source soft-switching inverter for small scale PM motor drive applications. The pulse processing drive circuit interface and its soft-switching operation are discussed from an experimental point of view. Moreover, its conductive noise is measured and evaluated for electrical AC servo motor drive as compared with that of the conventional hard switching inverter.