http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
증례보고 : 기관편향이 심한 환자에서 두부 위치 변경 후 발생한 기관내관의 폐쇄
한동우 ( Dong Woo Han ),장철호 ( Chul Ho Chang ),이종석 ( Jong Seok Lee ),나성원 ( Sung Won Na ),이수현 ( Su Hyun Lee ),남상범 ( Sang Beom Nam ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.52 No.3
Various causes of endotracheal tube obstruction during general anesthesia exist. Herein, the case of a 77-year old male patient, with tracheal deviation, who was intubated with an endotracheal tube in the emergency room, without a Murphy eye, is reported. He was transferred to the operating room for the removal of a subdural hematoma. The endotracheal tube suddenly became obstructed during flexion of neck for the craniotomy procedure. The distal bevel of the endotracheal tube, without Murphy eye, was discovered to have come into contact with the tracheal wall, with the airway being obstructed during the fiberoptic bronchoscopy. Shortly after extubation of the obstructed tube, an armored tube, with a Murphy eye, was reintubated, after which the respiration pattern immediately returned to normal. (Korean J Anesthesiol 2007; 52: 339~41)
Cold Stretching 압력용기용 ASS304 소재의 극저온 인장 및 피로거동
최훈석(Hoon Seok Choi),김재훈(Jae Hoon Kim),나성현(Seong Hyun Na),이윤형(Youn Hyung Lee),김성훈(Sung Hun Kim),김영균(Young Kyun Kim),김기동(Ki Dong Kim) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.5
ASS304 소재로 제작된 cold stretching 압력용기는 극저온 액화천연가스의 운반 및 저장에 이용된다. Cold stretching 압력용기는 특정 수압을 이용하여 허용응력까지 기존의 압력용기를 신장시킴으로써 재료에 상당량의 소성변형이 나타난다. 이 경우, ASS304 소재의 특성에 따라 소성변형 후 항복강도가 증가하며, 신장량에 따라 두께가 감소한다. 따라서 강도 및 무게측면에서 기존의 압력용기 대비 높은 효율을 나타낸다. 본 연구에서는 ASME 코드에 의거하여 제작된 소형 cold stretching 압력용기에서 직접 채취한 시편을 이용하여 극저온 인장 및 피로특성을 평가하였다. 또한 저온피로시험으로부터 획득한 S-N 선도를 통계적으로 접근하여 P-S-N 선도를 작성하였으며, SEM 을 이용하여 파단면을 분석하였다. Cold stretching(CS) pressure vessels from ASS304 (austenitic stainless steel 304) are used for the transportation and storage of liquefied natural gas(LNG). CS pressure vessels are manufactured by pressurizing the finished vessels to a specific pressure to produce the required stress σk. After CS, there is some degree of plastic deformation. Therefore, CS vessels have a higher strength and lighter weight compared to conventional vessels. In this study, we investigate the tensile and fatigue behavior of ASS304 sampled by CS pressure vessels in accordance with the ASME code at cryogenic temperature. From the fatigue test results, we show S-N curves using a statistical method recommended by JSEM-S002. We carried out the fractography of fractured specimens using scanning electron microscopy (SEM).