대학 부설연구소의 활성화 방안 - 대학의 공학교육이 나가야 할 방향 - 삼성종합기술원

하성한 대한전자공학회 1995 대한전자공학회 세미나 Vol.1995 No.-

산업계에서 본 전자공학 교육의 문제점과 대책 - 대기업측에서

하성한 대한전자공학회 1991 대한전자공학회 세미나 Vol.1991 No.-

[시스팀 소개]G4 FAX 시스템(CF6000)

하성한 대한전자공학회 1990 텔레콤 Vol.6 No.1

音響機器의 最新動向

하성한 대한전자공학회 1975 電子工學會雜誌 Vol.2 No.1

발톱의 미세 피판술을 이용한 손톱 결손의 재건

이기준,하성한,김효곤,신흥섭,유선오 대한수부외과학회 2011 대한수부외과학회지 Vol.16 No.1

Purpose: The presence of normal fingernail is important for the hand function and cosmetic appearance. We studied the results of the microsurgical reconstruction of the defected fingernail using composite toenail transfer. Materials and Methods: From March of 2004 to May of 2009, eleven fingernails were reconstructed using microsurgical composite toenail transfer in 10 patients with a mean age of 27 years (range, 13 to 47 years). There were three thumbs, five index fingers, and three long fingers. Whole fingernail was destructed in three cases and remaining eight cases had partial nail defect. Toenail was grafted from great toe in eight cases and from second toe in three cases. Five cases were harvested as an osteoonychocutaneous flap, two as a endoosteoonychocutaneous flap and four as an onychocutaneous flap. Results: All cases survived without any tissue necrosis. One arterial obstruction had occurred one day after surgery,which was resolved by repeated decompression and reanastomosis of the artery. All fingernails regenerated successfully. According to the rating system including assessment of shape, size and thickness of nail, nail pinch, pain, and patient’s satisfaction, ten cases were rated as excellent and one as good. All patients were satisfied with their hand function and appearance. Conclusion: Microsurgical composite toenail transfer can be an acceptable surgical reconstruction for the fingernail defect after trauma, providing satisfactory hand functions and cosmetic appearance. 목적: 외상 후 손톱의 결손은 미용상의 문제와 더불어 손의 기능에도 제한을 초래할 수 있다. 저자들은 손톱이 결손된 환자에서 발톱을 미세 수술로 이전하여 재건한 결과를 보고하고자 한다. 대상 및 방법: 2004년 3월부터 2009년 5월까지 발톱을 이전하여 손톱 결손을 재건한 10명 11예를 대상으로 하였다. 남자가 9명이었고, 평균 나이는 27세(범위, 13-47세)였다. 결손 부위는 엄지가 3예, 인지가 5예, 중지가 3예였으며, 손톱 전체가 결손된 경우가 3예였고 부분 결손이 8예였다. 공여부는 모족지가 8예, 제2족지가 3예였으며, 족지골을 포함한 경우가 7예였고, 연부 조직만 채취한 경우가 4예였다. 결과: 11예 모두 완벽하게 생존하여 100%의 생존율을 보였다. 합병증으로는 1예에서수술 직후 동맥 부전이 발생하여 2차례의 재수술로 잘 생존하였다. 전례에서 손톱은잘 재생되었고, 손톱의 모양과 크기, 두께, 손톱 짚기와 통증, 환자의 만족도에 따른분류상 우수가 10예, 양호가 1예로 좋은 결과를 보였으며, 전례에서 환자가 결과에 만족하였다. 결론: 발톱의 미세 피판술을 이용한 손톱의 재건술은 기능과 미용적인 측면에서 모두만족할 만한 결과를 제공할 수 있어 외상으로 결손된 손톱을 재건하는데 유용한 방법으로 생각된다.

Uncalcified Synovial Chondromatosis in the Pisotriquetral Joint

김효곤,하성한,이기준,유선오,김정래 대한정형외과학회 2015 Clinics in Orthopedic Surgery Vol.7 No.3

Synovial chondromatosis is a rare lesion in the wrist, but some cases in the distal radioulnar joint have been reported and previous case reports emphasize joint calcifications, shown on preoperative plain radiographs. We report an extremely uncommon case of synovial chondromatosis in the pisotriquetral joint, in which radiographs and magnetic resonance imaging did not demonstrate apparent calcified bodies. In our case, for the accurate diagnosis and treatment, surgical exploration of the joint and synovectomy with removal of loose bodies was performed.

굴곡건 섬유종에 의한 수근관증후군 및 완관절의 방아쇠 현상

김효곤,하성한,이기준,유선오,김정래 대한수부외과학회 2013 대한수부외과학회지 Vol.18 No.2

Triggering of the flexor tendon at the wrist is a rare phenomenon. The triggering can be caused by many different conditions, including anomalous muscle,thickened synovium, rheumatoid disease and tumors. We report the case of a 34-year-old man with triggering at the wrist and carpal tunnel syndrome caused by a fibroma of the flexor tendon. 완관절에서 굴곡건에 의한 방아쇠 현상은 매우 드물다. 원인은 매우 다양하여 종양이나 비정형적인 근육, 결절성 류마토이드질환, 굴곡건의 결절, 인대의 파열, 활액막의 비대 등이 완관절에서 방아쇠 현상을 유발한다. 저자는 34세 남자환자로 굴곡건 섬유종에 의해 발생한 수근관증후군과 완관절의 방아쇠 현상에 대한 증례를 보고하고자 한다.

성냥개비 모양의 골이식술을 이용한 원위 수지 불유합의 치료

신흥섭,김효곤,하성한,유선오,이기준 대한수부외과학회 2012 대한수부외과학회지 Vol.17 No.1

Purpose: The purpose of this study was to evaluate clinical and radiological results after osteosynthesis of distal phalangeal nonunion with bone defect by using matchstick-shaped bone graft. Materials and Methods: Fifteen distal phalangeal nonunions were treated with osteosynthesis using matchstickshaped bone graft from September, 2009 to October, 2010. The mean age of patients was 36.1 years (range: 15 to 56years). This study included 4 women and 10 men. The mean duration of follow-up was 16.8 months (range: 12 to 20months). We evaluated radiographs, and measured postoperative visual analogue scale (VAS) score and pinch power. Results: Union was achieved in all cases at a mean of postoperative 5.5 weeks (range: 4 to 6 weeks). The mean VAS score improved from 7.25 (range: 5 to 9) to 1.0 (range: 0 to 2) postoperatively. The mean postoperative pinch power was 7.75 lbs (range: 4 to 13 lbs) compared to opposite pinch power of 9.63 lbs (range: 5 to 15 lbs). There was no scar problem, pinch pain and other complication. Conclusion: steosynthesis of distal phalageal nonunion with bone defect by using matchstick-shaped bone graft is technically feasible and simple in that it does not need volar incision and debridement. It is considered as an effective treatment option in distal phalangeal nonunion with bone defect. 목적: 골 결손을 동반한 원위지골의 불유합 치료에 성냥개비 모양의 골이식술을 사용한 결과와 유용성을 알아보고자 한다. 대상 및 방법: 2009년 9월부터 2010년 10월까지 원위부 수지 불유합에 성냥개비 모양의 골이식술을 이용한 14명의 15예를 대상으로 하였다. 평균 연령은 36.1세(범위:15-56세)였으며, 남자가 10명, 여자가 4명이었고, 평균 추시 기간은 16.8개월(범위:12-20개월)이었다. 방사선학적 골유합 및 수술 후 visual analogue scale (VAS)score와 수술 후 정밀 파악력(pinch power)을 측정하여 임상적 결과를 평가 하였다. 결과: 모든 환자에게서 골유합을 얻었으며, 평균 골 유합 시기는 5.5주(범위: 4-6주)였다. 수술 후 VAS score는 수술 전 7.25 (범위: 5-9)에서 수술 후 1.0 (범위: 0-2)으로 호전되었다. 평균 9.63 lbs (범위: 5-15 lbs)인 건측 정밀파악력에 비교하여 골유합 후 측정한 환측의 정밀파악력은 평균 7.75 lbs (범위: 4-13 lbs)으로 많이 호전되었다. 수술 후 절개 반흔 부위의 동통은 거의 없고 강한 파악 시에도 통증이 호전되었으며, 다른 특별한 합병증은 보이지 않았다. 결론: 골 결손을 동반한 원위지골의 불유합 치료를 위한 성냥개비 모양의 골이식술은기술적으로 비교적 용이하며 수지 수장부 절개와 소파술을 시행하지 않고도 골유합을 쉽게 얻을 수 있어 유용한 술식으로 생각된다.

금속판과 병합한 신연 골형성술을 이용한 단중수증의 치료

제갈믿음,김효곤,하성한,이기준 대한정형외과학회 2019 대한정형외과학회지 Vol.54 No.5

The treatment of a brachymetacarpia using conventional distraction osteogenesis requires holding an external fixator following distraction for stability, which causes prolonged discomfort that adversely affects the patient’s daily activities. This paper reports a case of a 20-year-old male of brachymetacarpia treated with distraction osteogenesis combined with a plate reducing the period of an external fixator, allowing rapid return to the daily activities, and presenting good clinical results. 단중수증을 치료하기 위한 일반적인 신연 골형성술은 신연 기간이 끝나도 안정성을 위해 외고정 장치를 장기간 유지해야 하기 때문에 환자의 일상 활동 제약이 불가피하다. 저자들은 단중수증으로 내원한 20세 남성 환자에서 금속판을 조합한 신연 골형성술을 통해 외고정 장치의 착용 기간을 줄여 조기에 일상 활동 복귀가 가능하도록 하고 만족할 만한 임상 결과를 얻었기에 이를 보고하고자 한다.

수부 재건을 위한 동맥화 정맥 피판의 확장된 적응증과 임상적 유용성의 재조명

우상현,김경철,이기준,하성한,유선오,김주성,Woo, Sang-Hyun,Kim, Kyung-Chul,Lee, Gi-Jun,Ha, Seung-Han,You, Sun-O,Kim, Joo-Sung 대한미세수술학회 2005 Archives of reconstructive microsurgery Vol.14 No.1

Purpose: The purpose of this study is to present extended indications for the use of arterialized venous flaps in reconstructing soft tissue, tendon, nerve, blood vessel, and composite tissue defects of the hand of various sizes based on researches and clinical experiences of the authors. Moreover, procedures to achieve complete flap survival and postoperative results are presented. Materials & methods: This study is based on 154 cases of arterialized venous flaps performed to reconstruct the hand during the past 11 years. The most common cause of injury was industrial accidents with 125 cases. One hundred thirty patients or 84% of the cases had emergency operation within 2 weeks of the injury. The flaps were categorized depending on the size of the flap. Flaps smaller than $10\;cm^2$ were classified as small (n=48), those larger than $25\;cm^2$ classified large (n=42) and those in between medium (n=64). Classified according to composition, there were 88 cases (57.1 %) of venous skin flaps, 28 cases of innervated venous flaps, 15 cases of tendocutaneous venous flaps, which incorporated the palmaris longus tendon, for repair of extensor tendons of the fingers, and 17 cases of conduit venous flaps to repair arterial defect. There were 37 cases where multiple injuries to multiple digits were reconstructed. Moreover, there were 6 cases of composite tissue effects that involved soft tissue, blood vessels and tendons. The donor sites were ipsilateral forearm, wrist and thenar area, foot dorsum, and medial calf. The recipient sites were single digit, multiple digits, first web space, dorsum and palm of hand, and wrist. Results: There were seven cases (4.5%) of emergent re-exploration due to vascular crisis, and 3 cases of flap failure characterized by more than 50% necrosis of the flap. The survival rate was 98.1 % (151/154). In small flaps, an average of 1.01 afferent arteries and 1.05 efferent veins were microanastomosed, and in large flaps, an average of 1.88 afferent arteries and 2.19 efferent veins were anastomosed. In 8 cases where innervated flaps were used for reconstructing the palm of the hand, the average static two-point discrimination was $10\;(8{\sim}15)\;mm$. In 12 cases where tenocutaneous flaps were used, active range of motion at the proximal interphalangeal joint was 60 degrees, 20 degrees at the distal interphalangeal joint, and 75 degrees at the metacarpophalangeal joint. Conclusion: We conclude that the arterialized venous flap is a valuable and effective tool in the reconstruction of hand injuries, and could have a more comprehensive set of indications.