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Minute Colon Perforation by a Nonabsorbable Suture Knot after Uterine Myomectomy
Hyeonkyeong Kim,Jinhoon Nam,Ryung-Ah Lee Ewha Womans University School of Medicine 2022 EMJ (Ewha medical journal) Vol.45 No.3
We report a rare case of suture material-related colon perforation. A 60-year-old woman visited clinics because of the nonspecific abdominal discomfort for several months. There were no specific medical history except previous laparoscopic myomectomy 15 years ago. Colonoscopy and abdomen-pelvis computed tomography revealed an unknown foreign body penetrating the sigmoid colon wall adjacent to the uterus. We performed laparoscopic exploration with foreign body removal and primary colon wall repair. The foreign body was identified as a non-absorbable suture material suggestive of used in previous myomectomy. With recent trends for minimally invasive procedures in the field of pelvic organ surgery, surgeons, especially those without sufficient training have to pay attention to selecting the proper surgical suture materials.
바이오 가스터빈 연소기의 비반응장과 반응장의 3차원 유동해석
안윤호(Yunho An),남삼식(Samsik Nam),최진훈(Jinhoon Choe),임지혁(Jihyuk Im),김호근(Hokeun Kim),전재철(Jaechul Chun) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.5
최근 두산중공업은 바이오가스를 연료로 사용하는 가스터빈엔진을 개발하고 있다. 본 논문은 바이오 가스터빈엔진의 주요 구성품 중 하나인 연소기의 비반응장과 반응장 해석에 대한 것이다. 해석을 통해 연소기 설계 결과를 검증하고 다양한 Fuel Distribution Ratio에서의 연소기 작동 거동을 예측하였다. 해석 결과는 두산에서 자체 수행한 리그 시험 결과와 비교하였다. 해석 결과 연소기 압력 손실, 공기 분배비, 재순환 유동의 예측은 신뢰할 만한 수준이며, 낮은 Fuel Distribution Ratio 영역에서의 NOx 생성 추세는 다소 불일치하였다. Doosan Heavy Industries & Construction Co., Ltd. has been recently developing the gas turbine engine using the biogas as fuel. This paper describes the non-reacting and reacting flow analysis of the combustor which is one of the main components in gas turbine engine. Through CFD analysis, investigation has been performed to evaluate the primary factors for aerodynamic design and to predict combustor behaviors during operation with various fuel distribution ratios. The calculation results are compared with rig test data, which reveals that CFD predictions such as pressure loss, air distribution ratio, and recirculation flow are quite reliable. The trend of NO formation was similar with the test, except the low fuel distribution ratio.