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고압 전기화상에 의한 수부 손상 시 비골동맥 천공지 유리피판술을 이용한 재건
김동훈,유중석,임준규,이동락 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.1
Purpose: The hand is frequently affected area in high voltage electrical burn injury as an input or output sites. Electrical burn affecting the hand may produce full thickness necrosis of the skin and damage deep structures beneath the eschar, affecting the tendon, nerve, vessel, even bone which result in serious dysfunction of the hand. As promising methods for the reconstruction of the hand defects in electrical burn patients, we have used the peroneal perforator free flaps. Methods: From March 2005 to June 2006, we applied peroneal perforator free flap to five patients with high tension electrical burn in the hand. Vascular pedicle ranged from 4cm to 5cm and flap size was from 4×2.5cm to 7×4cm. Donor site was closed primarily.Results: All flaps survived completely. There was no need to sacrifice any main artery in the lower leg, and there was minimal morbidity at donor site. During the follow-ups, we got satisfactory results both in hand function and in aesthetic aspects.Conclusion: The peroneal perforator flap is a very thin, pliable flap with minimal donor site morbidity and is suitable for the reconstruction of small and medium sized wound defect, especially hand with electrical burn injury.
고순도 Aluminum 에 있어서 가공경화가 활성화 Energy 에 미치는 영향
김동훈,황성현,이병휘 대한금속재료학회(대한금속학회) 1969 대한금속·재료학회지 Vol.6 No.4
99.9% 純度의 aluminum 試片을 加工硬化度에 따라서 恢復에 必要한 活成化 energy를 測定해 보았다. 4.75 ㎜ 直經의 aluminum捧을 10%, 20% 및 29%로 冷間壓縮加工을 實施하여 最終길이가 均一한 6 ㎜로 되게끔 하였다. 10% 및 29% 試片에 對하여 240∼330℃ 溫度區間에서 한時間 간격으로 isochronal annealing을 實施한 hardness data로부터 再結晶溫度가 304℃ 및 285℃ 임을 알 수 있었다. 한편 isochronal annealing을 290℃, 310℃, 및 330℃에서 實施한 結果 恢復에 必要한 活性化 energy는 각각 29,600㎈/㏖, 25,200㎈/㏖ 및 25,200㎈/㏖을 얻을 수 있었다. The effect of plastic deformation on the activation energy of recovery and recrystalization temperature of 99.9% purity polycrystalline Aluminum was investigated. The 10%, 20% and 29% cold compressed aluminum specimen were prepared from 4.75 ㎜ diameter cold drawn rod. From the hardness data obtained by isochronal annealing of one hour between the temperature range of 240℃-330℃ under hydrogen atmosphere, the recrystallization temperatures for 10% and 29% cold compressed were measured to be 304℃ and 285℃ respectively. On the other hand, from the hardness data obtained by isothermal annealing at the temperature range of 290℃-330℃, the activation energy of recovery for 10%, 20% and 29% cold compressed were deduced as 29,600, 25,200 and 22,500 ㎈/㏖ respectively. The activation energy of recovery can be expressible in linear equation in terms of the stored energy of plastic deformation.