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DEVELOPMENT OF THE FMECA PROCESS AND ANALYSIS METHODOLOGY FOR RAILROAD SYSTEMS
J. H. KIM,정현용,박준서 한국자동차공학회 2009 International journal of automotive technology Vol.10 No.6
FMECA (Failure Modes, Effects and Criticality Analysis) is a procedure used to identify potential failure modes, determine causes and effects of failure modes and mitigate or remove its effects on system functional performance. For the last several decades, FMECA has been widely used in industry, and specialized versions of FMEA have been developed for several industrial sectors. For instance, MIL-1629a, SAE-J1739 and IEC-60812 have been mainly used in the military, automotive and electronics industries, respectively. However, there is no specialized FMECA method for the railroad industry yet, despite a need for highly reliable systems. Thus, in this study three specifications, MIL-1629a, SAE-J1739 and IEC- 60812, were analyzed and compared with one another, and characteristics and requirements of railroad systems were summarized. Then a specialized FMECA procedure for railroad systems was proposed based on the processes documented in the specifications, characteristics and requirements of railroad systems. Finally, the procedure was applied to a railroad system in order to validate its applicability.
경피 내시경하 위루술 후 발생한 상장간막 동맥 손상 1예
이서희 ( Seo Hee Lee ),문희석 ( Hee Seok Moon ),박재호 ( Jae Ho Park ),김주석 ( Ju Seok Kim ),강선형 ( Sun Hyung Kang ),이엄석 ( Eaum Seok Lee ),김석현 ( Seok Hyun Kim ),성재규 ( Jae Kyu Sung ),이병석 ( Byung Seok Lee ),정현용 ( H 대한소화기학회 2018 대한소화기학회지 Vol.72 No.6
Percutaneous endoscopic gastrostomy (PEG) is widely used to provide nutritional support for patients with dysphagia and/or disturbed consciousness preventing oral ingestion, and PEG tube placement is a relatively safe and convenient non-surgical procedure performed under local anesthesia. However, the prevention of PEG-insertion-related complications is important. A 64-year-old man with recurrent pneumonia underwent tracheostomy and nasogastric tube placement for nutritional support and opted for PEG tube insertion for long-term nutrition. However, during the insertion procedure, needle puncture had to be attempted twice before successful PEG tube placement was achieved, and a day after the procedure his hemoglobin had fallen and he developed hypotension. Abdominal computed tomography revealed injury to a pancreatic branch of the superior mesenteric artery (SMA) associated with bleeding, hemoperitoneum, and pancreatitis. Transarterial embolization was performed using a microcatheter to treat hemorrhage from the injured branch of the SMA, and the acute pancreatitis was treated using antibiotics and supportive care. The patient was discharged after an uneventful recovery. Clinicians should be mindful of possible pancreatic injury and bleeding after PEG tube insertion. Possible complications, such as visceral injuries or bleeding, should be considered in patients requiring multiple puncture attempts during a PEG procedure. (Korean J Gastroenterol 2018;72:308-312)