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최광배,김승홍 중앙대학교 의과대학 의과학연구소 1990 中央醫大誌 Vol.15 No.1
Surgeon's knowledge on the skin blood flow gives an important guide in all kinds of skin surgery. Lots of techniques of measuring skin blood flow have been proposed till now, including radioactive isotope clearance study and transcutaneous oxygen tension monitors. Laser Doppler flowmetry (LDF) is a recently developed method of measuring the blood flow. With a non-invasive sensor simply attached to the skin, skin blood flow of 124 healthy Koreans were measured at the face, chest, frearm, hand, thigh, shin and the foot to investigate the difference of blood flow between the parts in normal person. Following results were obtained; 1. Mean skin blood flow of the face, chest, forearm, hand, thigh, shin and the foot was 5.79±0.89, 4.56±0.73, 1.87±0.32, 3.43±0.59, 1.46±0.23, 1.72±0.28 and 2.35±0.38 ml/min/100gm of tissue. 2. Mean skin blood flow of the face and chest were higher than those of the extremities (p<0.01). Among extremities, values of the hand were higher than others (p<0.05), but there was no significant difference between the rest of areas. 3. Mean skin blood flow of the first decade was slightly higher than that of the seventh decade (p<0.01), but there was no significant difference between adjacent age groups. 4. There was no significant difference in the skin blood flow between male and female. 5. There was no significant difference in the skin blood flow between the skin with or without underlying muscle layer.
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Silcone Tube를 이용한 유리피판의 미세혈관 연결에 관한 실험적 연구
최광배,김승홍,민대홍 大韓成形外科學會 1982 Archives of Plastic Surgery Vol.9 No.3
Recent increasing of trauma and cancer surgery has resulted in the development of reconstruction of tissue defect for rehabilitation in the aspect of restoration of appearance as well as well as function. Skin flaps are now become popular in variable cases of such reconstruction. The use of distant flaps are increasingly needed for the coverage of extensive defect of skin and soft tissue because of the limited amount of coverage offered by the local flaps. The development of free flaps based on microvascular surgery has reduced the numbers of operation, days of hospitalization and total expenses in every case of reconstruction, leaving some problems in operative techniques and complications. In vascular island of free flaps, it is commonly accepted that initial survival of the flap is due to adequate blood flow in its vascular pedicle. During the healing period, the flap can become independent on this pedicle as neovascularization from the surrounding tissue proceeds. This study in therefore designed to investigate the temporary blood supply to the transferred free flaps by silicone tubes connecting between femoral vessels and the effect of temporary blood supply to the flaps on survival of those in rabbits. The survival rate of the flaps was observed in relation to the patency of the silicone tubes. The results as follows: 1. Because of thrombus formation, silicone tubes were gradually obstructed as time elapsed with patency rate of about 70% at third postoperative day and about 50% at the fifth postoperative day. No. difference was noted in patency patency rate between artery and vein. 2. In rabbits of artery-to-artery or vein anastomosis, survival rate of flap was about 90% when the tubes were patent for three days postoperatively.
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최광배,민대홍,윤진호,김승홍 大韓成形外科學會 1982 Archives of Plastic Surgery Vol.9 No.2
The auricle, diverging from the side of the head, consists of a delicate shell of elastric cartilage between the anterior and posterior of the thin skins. Thus, a radiacl chage in the outlook for the results of ear reconstruction has occured in recent years due to the delicate anatomical specificity. Inspite of the challenge of the many plastic surgeons, successful resconstruction of acquired defects may be extrimely difficult or impossible- especially, in patients who have suffered total traumatic loss of the auricle in which the local soft tissues are destroyed or deeply scarred. We experienced the case of total auricular loss with severe periauricular abrasion and dirty tattooing, and can obtained successful total ear reconstuction using buried cartilage and the distant flap.
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불확실성이 고려된 비용-편익분석 기법을 도입한 최적설계홍수량 산정
김상욱,최광배,Kim, Sang Ug,Choi, Kwang Bae 한국수자원학회 2022 한국수자원학회논문집 Vol.55 No.6
Flood frequency analysis commonly used to design the hydraulic structures to minimize flood damage includes uncertainty. Therefore, the most appropriate design flood within a uncertainty should be selected in the final stage of a hydraulic structure, but related studies were rarely carried out. The total expected cost function introduced into the flood frequency analysis is a new approach for determining the optimal design flood. This procedure has been used as UNCODE (UNcertainty COmpliant DEsign), but the application has not yet been introduced in South Korea. This study introduced the mathematical procedure of UNCODE and calculated the optimal design flood using the annual maximum inflow of hydroelectric dams located in the Bukhan River system and results were compared with that of the existing flood frequency. The parameter uncertainty was considered in the total expected cost function using the Gumbel and the GEV distribution, and the Metropolis-Hastings algorithm was used to sample the parameters. In this study, cost function and damage function were assumed to be a first-order linear function. It was found that the medians of the optimal design flood for 4 Hydroelectric dams, 2 probability distributions, and 2 return periods were calculated to be somewhat larger than the design flood by the existing flood frequency analysis. In the future, it is needed to develop the practical approximated procedure to UNCODE.
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근판 및 근피판 작성시 운동기능보존에 관한 실험적 연구
김승홍,최광배,민대홍,윤진호 大韓成形外科學會 1982 Archives of Plastic Surgery Vol.9 No.1
Muscle and myocutaneous flaps have become enormously useful reconstructive tools. Utilization of these flaps, however, often compromises or sacrifices donor motor function. These motor losses can be clinically signicant in certain activities. Accordingly, when less than total muscle bulk or their cutaneous teritory, are required for reconstruction, these muscles have a consistent proximal branching of their neurovascular anatomy that makes possible surgically splitting the units allows transfer of cutaneous paddles carried by on branch of the split muscle, and preservation of motor function with the remaining branch. This potential muscle and myocutaneous units may include the latissimus dorsi, pectoralis major, trapezius, external oblique, gluteus maximus, temporalis, and soleus. This study describes the anatomical basis for this maneuvers, reports experimental application of the latissimus dorsi myocutaneous units split for motor preservation in 8 dogs. In each case, demonstrable motor function was preserved and successful flap transfer accomplished.
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최정후,최광배,김병채,선도원,김상돈 ( Jeong Hoo Choi,Kwang Bae Choi,Peter Kim,Do Won Shun,Sang Done Kim ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.5
The effect of temperature en the particle entrainment rate was measured and discussed in a gas fluidized bed(0.1m in diameter, 2.1m high) which used sand as a bed material and was equipped with an electric heater. The particle size(0.075-0.425㎜), gas velocity(0.65-2.3 m/s) and bed temperature(20-600℃) were varied as experimental variables. The particle entrainment rate increased very slowly with the bed temperature at the gas velocity less than 0.8 m/s. At the gas velocity greater than 1 m/s, the particle entrainment rate decreased with increasing the bed temperature until a certain temperature above which the particle entrainment rate increased with the bed temperature. The minimum point of particle entrainment rate shifted to higher temperature with increasing gas velocity. The change of the particle entrainment rate along the bed temperature was same as that of the particle size whose terminal velocity was equal to the gas velocity.
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대구개혈관의 분리ㆍ연장에 따른 구개점막편의 생존에 관한 실험
윤진호,오창학,최광배,김승홍,민대홍 大韓成形外科學會 1980 Archives of Plastic Surgery Vol.7 No.1
Several procedures have been used over the years to correct velopharyngeal insufficiency, and velopharyngeal closure is the primary essential for nonstigmatized speech but the relative importance of palatal length and morbility to pharyngeal size, shape, and morbility is still being defined. Pushback procedures require more extensive hard palate mucoperiosteal detachment for the velopharyngeal competence. Isolation of the greater palatine vessels from the mucoperiosteum is troublesome and careful maneuver, and this procedure helps to maintain sufficient pushback and to reduce the tension for preventing the danger of wound disruption and fistula formation. Attending the experimental study, the relationship between the survival length of the mucoperiosteal flaps and the isolated length of the greater palatine vessels is revealed and confirmed as the followed results; 1. The mucoperiosteums of dogs designed by 3 flap technique 5 cm in length which are completely elevated from the bony palate and which greater palatine vessels are identified and isolated 1, 2, and 4 cm from the greater palatine foramen respectively, are survived completely in all cases. 2. The sufficient isolation of the greater palatine vessels from the mucoperiosteal flaps help to maintain velopharyngeal competence and reduce the wound tension in clinical application.
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