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김성민,김대연,김상윤,김성철,김우기,김재억,김재천,박귀원,서정민,송영택,오정탁,이남혁,이두선,전용순,정상영,정을삼,최금자,최순옥,한석주,허영수,홍정,최승훈,Kim, Seong-Min,Kim, Dae-Yeon,Kim, Sang-Yoon,Kim, Seong-Chul,Kim, Woo-Ki,Kim, Jae-Eok,Kim, Jae-Chun,Park, Kwi-Won 대한소아외과학회 2006 소아외과 Vol.12 No.2
Inguinal hernia is the most common disease treated by the pediatric surgeon. There are several controversial aspects of management 1)the optimal timing of surgical repair, especially for preterm babies, 2)contralateral groin exploration during repair of a clinically unilateral hernia, 3)use of laparoscope in contralateral groin exploration, 4)timing of surgical repair of cord hydrocele, 5)perioperative pain control, 6)perioperative management of anemia. In this survey, we attempted to determine the approach of members of KAPS to these aspects of hernia treatment. A questionnaire by e-mail or FAX was sent to all members. The content of the questionnaire were adapted from the "American Academy of Pediatrics (AAP) Section on Surgery hernia survey revisited (J Pediatr Surg 40, 1009-1014, 2005)". For full-term male baby, most surgeons (85.7 %) perform an elective operation as soon as diagnosis was made. For reducible hernia found in ex-preterm infants already discharged from the neonatal intensive care unit (NICU), 76.2 % of surgeons performed an elective repair under general anesthesia (85.8 %). 42.9 % of the surgeons performed the repair just before discharge. For same-day surgery for the ex-premature baby, the opinion was evenly divided. For an inguinal hernia with a contralateral undescended testis in a preterm baby, 61.9 % of surgeons choose to 'wait and see' until 12 month of age. The most important consideration in deciding the timing of surgery of inguinal hernia in preterm baby was the existence of bronchopulmonary dysplasia (82.4 %), episode of apnea/bradycardia on home monitoring (70.6 %). Most surgeons do not explore the contralateral groin during unilateral hernia repair. Laparoscope has not been tried. Most surgeons do not give perioperative analgesics or blood transfusion.
김성민,김창우,김병규,오정탁,한석주,Kim, Seong-Min,Kim, Chang-Woo,Kim, Byoung-Kyu,Oh, Jung-Tak,Han, Seok-Joo 대한소아외과학회 2007 소아외과 Vol.13 No.1
The authors applied anterior sagittal transrectal apporach (ASTRA) for the repair of urethrovaginal fistula which developed after total repair of persistent cloaca. The patient had been diagnosed to have persistent cloaca, double uterus and double vagina, and received PSARP, excision of right-side uterus and vagina, and left vaginal switch operation at 22 months old. After operation, the patient admitted several times due to frequent urinary tract infection and ectopic stone formation in bladder and neovagina. Urethro-neovaginal fistula was confirmed by cystoscopy and corrected with ASTRA. Postoperative voiding cystourethrogram showed no fistula tract. ASTRA showed improved surgical field, minimized ureterocystic damage, and preserved perirectal nerve due to limited incision of rectum.
김성민,김진순,신동명,김영관,하윤경,Kim, Seong Min,Kim, Jin Sun,Sin, Dong Myeong,Kim, Yeong Gwan,Ha, Yun Gyeong Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.7
New azomethine metal complexes were synthesized systematically and characterized. Beryllium, magnesium, or zinc ions were used as a central metal cation and aromatic azomethines (L1-L4) were employed as a chelating anionic ligand. Emission peaks o f the complexes in both solution and solid states were observed mostly at the region of 400-500 nm in the luminescence spectra, where blue light was emitted. Three of them (BeL1 (Ⅰ), ZnL2 (Ⅱ), and ZnL3 (Ⅲ)) were sublimable and thus were applied to the organic light-emitting devices (OLED) as an emitting layer, respectively. The device including the emitting layer of Ⅰ exhibited white emission with the broad luminescence spectral range. The device with the emitting layer of Ⅱ showed blue luminescence with the maximum emission peak at 460 nm. Their ionization potentials, electron affinities, and electrochemical band gaps were investigated with cyclic voltammetry. The electrochemical gaps of 2.98 for I, 2.70 for Ⅱ, and 2.63 eV for Ⅲ were found to be consistent with their respective optical band gaps of 3.01, 2.95 and 2.61 eV within an experimental error. The structure of OLED manufactured in this study reveals that these complexes can work as electron transporting materials as well.
상장간막동맥 증후군의 복강경 수술 및 3차원재건 복부 전산화단층촬영 영상을 이용한 추적관찰 -1예보고-
김성민,김성훈,권인규,김명준,형우진,최승훈,Kim, Seong-Min,Kim, Sung-Hoon,Kwon, In-Kyou,Kim, Myoung-Joon,Hyoung, Woo-Jin,Choi, Seung-Hoon 대한소아외과학회 2005 소아외과 Vol.11 No.2
Superior mesenteric artery (SMA) syndrome is a rare disorder caused by extrinsic compression of the third portion of the duodenum by the SMA. The operative treatment of choice is bypassing the obstructed duodenal segment by duodenojejunostomy. We report one case of SMA syndrome treated by laparoscopic duodenojejunostomy and followed up by 3D-reconstructive CT scan. A fifteen-year-old boy with intermittent vomiting and weight loss was admitted. Ultrasonography showed narrowing of the distance between the SMA and aorta. Hypotonic duodenography showed dilatation of duodenal third portion and barium stasis. On 3Dreconstructive CT scan, the angle between SMA and aorta was $37^{\circ}$. The postoperative course was uneventful. Three months later, he had gained 3 kg of weight and the angle between SMA and aorta increased to $38-39^{\circ}$ on 3D reconstructive CT scan. Laparoscopic duodenojejunostomy for bypassing the obstructive duodenum in SMA syndrome is a feasible and safe method.
구조응력을 이용한 하중 전달형 십자 양면 비대칭 필렛 용접 시험편의 피로강도 평가
김성민,김영남,이승현,김명현,Kim, Seong-Min,Kim, Young-Nam,Lee, Seung-Hyun,Kim, Myung-Hyun 대한용접접합학회 2012 대한용접·접합학회지 Vol.30 No.6
Fatigue tests and analyses were carried out to investigate fatigue strength and crack initiation point of load-carrying asymmetric double bevel cruciform welded joints. Mesh-insensitive structural stress approach was adopted to estimate high precise fatigue life and crack initiation point. Two different case material and weld shape were considered in this study. Results of fatigue tests and analyses were compared and discussed in consideration of applicability of structural stress approach as the reliable fatigue assessment method of cruciform welded joints.
김성민,김남현,Kim, Seong-Min,Kim, Nam-Hyeon 대한의용생체공학회 1998 의공학회지 Vol.19 No.4
Human pharynx is unique, acting as a complex interchange between the oral cavity and esophagus, and between the nasal cavity and lungs. It is actively involved in the transport of food and liquid, producing the forces that guide that bolus into the upper esophagus and away from the adjacent larynx and lungs. This study intended to develop a biomechanical model of the human pharynx, utilizing Finite Element Method(FEM). Within each model changes in cross sectional intralumenal area were calculated and compared with the area from the computer-generated FE model. Area matching allowed estimation of intraluminal pressure gradients during swallow. The estimated pharyngeal pressure gradient varies from one region to another. The estimated pharyngeal pressure gradients showed different patterns for upper four levels and lower four levels. The contraction velocity for upper four levels is much higher than lower four levels. The higher contraction velocities and pressure gradients in the upper levels are consistent with the bolus velocities required for efficient swallow. 인두는 구강과 위장, 비강과 폐의 중간에서 능동적으로 구강을 통해 섭취되는 음식물과 비강을 통해 흡입되는 공기의 통로역할을 하는 주요한 기관이다. 본 연구는 유한요소기법을 이용한 인두의 3차원 구조의 재구성 과정을 거쳐 인두의 생체역학모델을 구현하여 각단면에서의 단면적을 유한요소모델의 시뮬레이션 결과에 의한 변위를 이용하여 산출하여 최적화 과정을 거쳐 인두의 기능시 내부에 생성되는 압력의 연속적인 압력분포를 추정할 수 있었다. 즉 인두내의압력에 대한 형상의 변형을 관찰하여 각 단면에서의 단면적을 산출하고 이를 실제의 CT영상자료와 비교하여 최적화 고장을 거쳐 각 부분에서의 추정 압력구배를 구하였다. 모델 시뮬레이션 결과 추정된 압력구배는 10-55 mmHg범위에 분포되어 있으며 전체 인두부 가운데 상부의 4레벨의 압력분포는 아부의 그것과 다른 형태를 보이는 것으로 나타났다. 이러한 인두의 생체역학모델은 인두기능장애를 가진 환자군에 적용하여 비교 분석할 경우 임상자료로서 유용할 것으로 사료된다.