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저위합류 담낭관을 가진 환자에서 잔여 담낭관석에 의해 발생한 Mirizzi syndrome의 내시경적 치료 1예
송치우 ( Chiwoo Song ),손병관 ( Byoung Kwan Son ),최재혁 ( Jea Hyuk Choi ),김동신 ( Dong Shin Kim ),김세종 ( Sae Jong Kim ),민향기 ( Hyang Ki Min ),김상혁 ( Sang Hyuk Kim ),이기영 ( Ki Young Lee ) 대한췌담도학회 2017 대한췌담도학회지 Vol.22 No.1
Mirizzi syndrome is a rare complication, resulting in bile duct obstruction and jaundice that usually arise from impacted gallstone in the cystic duct or neck of the gallbladder. It is vitally important to confirm underlying cystic duct anomaly in Mirizzi syndrome since it can produce surgical difficulty and higher complications. Generally, Mirizzi syndrome is treated surgically while endoscopic treatment is limited. Herein, we present Mirizzi syndrome with low lying cystic duct and remnant cyst duct calculi treated successfully by biliary stent and administration of choleretic agent, following by balloon dilatation on cystic duct and balloon extraction of the stone.
Song Ari,Im Minji,Kim Min-Sun,Noh Eu Seon,Kim Chiwoo,Jang Jahyun,Lee Sae-Mi,Ki Chang-Seok,Cho Sung Yoon,Jin Dong-Kyu 대한소아내분비학회 2023 Apem Vol.28 No.1
Coffin-Lowry syndrome (CLS, OMIM # 303600) is a rare X-linked disorder caused by mutations in RPS6KA3. CLS is characterized by facial dysmorphism, digit abnormalities, developmental delays, growth retardation, and progressive skeletal changes in male patients. Females with CLS are variably affected, complicating diagnosis. Here, we describe the clinical and molecular findings in a female Korean child with CLS and review the associated literature. A 5-year-old girl presented with short stature and developmental delays. She had a coarse facial appearance characterized by a prominent forehead, hypertelorism, thick lips, and hypodontia. She also had puffy tapering fingers and pectus excavatum. We performed exome sequencing and identified a novel, likely pathogenic, heterozygous variant, c.326_338delinsCTCGAGAC (p.Val109Alafs*10), in RPS6KA3 (NM_004586.2). This is the first Korean female genetically diagnosed with CLS. In contrast to the delayed bone age reported in previous studies, our patient showed advanced bone age and central precocious puberty. CLS should be considered as a differential diagnosis of short stature, tapering fingers, and developmental delay. We suggest that molecular techniques can be a useful tool for diagnosis of rare disorders such as CLS because such conditions are not simple, and the associated spectrum of phenotypes can vary.
송지영(Jiyoung Song),조치우(Chiwoo Cho),정유림(Youlim Jung),지은경(Eunkyoung Jee),배두환(Doo-Hwan Bae) 한국정보과학회 소프트웨어공학 소사이어티 2018 소프트웨어공학회지 Vol.27 No.1
제한된 자원인 모바일 디바이스 배터리의 소모는 회로 설계자들이 회로를 분석 및 평가할 때 중요한 척도가 된다. 기존의 모바일 디바이스 배터리 소모 분석을 위해 여러 배터리 소모 모델 생성 연구가 수행되었으며, 배터리 소모 모델 생성 기법은 센서의 사용 유무, 런타임 모델 생성 여부, 검증 및 테스팅 목적으로의 모델 이용 여부 등에 따라 서로 다른 특징을 가진다. 본 연구에서는 모바일 디바이스회로 설계자들이 회로를 분석하는데 도움을 주기 위한 목적으로 지금까지 연구되어 온 배터리 소모 모델분석 기법들에 대하여 비교 및 평가하고자 한다. 평가 결과를 기반으로 향후 모바일 디바이스 배터리 소모 분석 연구의 발전 방향을 제안한다. The consumption of mobile device batteries which are limited resources is an important criterion when circuit designers analyze and evaluate circuits. For this reason, researchers conducted researches with different models of battery consumption to analyze power consumption of mobile devices. The battery consumption model generation techniques have various characteristics depending on availability of sensors, run-time model generation, and models for using in verification and testing. However, there is lack of comparison and analysis between varied battery consumption model generation methods. In this research, we compare and evaluate the analysis methods which have been studied so far to support the circuit investigation for circuit designers. Finally, we suggest the direction of researches in battery consumption analysis using the comparison result.
VRF 시스템의 고효율 부하대응 열교환기 가변유로 기술에 관한 연구
장지영(JiYoung Jang),송치우(ChiWoo Song),윤필현(PhilHyun Yoon),사용철(YongCheol Sa) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
In this study, the latest heat exchanger technology to improve the performance of the VRF system is introduced. The heat exchanger is a key component in VRF system performance and in order to respond effectively to various loads, a technology has been developed that divides the heat exchanger into three passages through valve control and realizes optimal load-response operation by changing the flow passage. This technology enables bypass operation to respond to a small load under heating overload conditions, and prevents freezing of the lower end of the heat exchanger to supply continuous heating operation. In addition, it was possible to increase the operating efficiency by about 20% by changing the heat exchanger flow path during cooling and heating operation.
VRF 시스템의 고효율 부하대응 열교환기 가변유로 기술에 관한 연구
장지영(JiYoung Jang),송치우(ChiWoo Song),윤필현(PhilHyun Yoon),사용철(YongCheol Sa) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
In this study, the latest heat exchanger technology to improve the performance of the VRF system is introduced. The heat exchanger is a key component in VRF system performance and in order to respond effectively to various loads, a technology has been developed that divides the heat exchanger into three passages through valve control and realizes optimal load-response operation by changing the flow passage. This technology enables bypass operation to respond to a small load under heating overload conditions, and prevents freezing of the lower end of the heat exchanger to supply continuous heating operation. In addition, it was possible to increase the operating efficiency by about 20% by changing the heat exchanger flow path during cooling and heating operation.
Acute upper limb ischemia in a patient with newly diagnosed paroxysmal atrial fibrillation
( Dong Shin Kim ),( Seunghwan Kim ),( Hyang Ki Min ),( Chiwoo Song ),( Young Bin Kim ),( Sae Jong Kim ),( Ji Young Park ),( Sung Kee Ryu ),( Jae Woong Choi ) 영남대학교 의과대학 2017 Yeungnam University Journal of Medicine Vol.34 No.2
Acute limb ischemia (ALI) due to an embolism is associated with high mortality rate and poor prognosis, and early diagnosis with prompt revascularization is required to reduce the risk of limb amputation or even death. The etiologies of ALI are diverse, and it includes an embolism from the heart and thrombotic occlusion of the atherosclerotic native vessels, stents, or grafts. An uncommon cause of ALI is acute arterial thromboembolism, and atrial fibrillation (AF) is the single most important risk factors for systemic thromboembolism. It is important to correctly identify the source of ALI for secondary prevention, as it depends on the underlying cause. Percutaneous transluminal angioplasty (PTA) has been proven to be a safe and effective treatment for focal atherosclerotic and thrombotic occlusive diseases of the aorta and its major extremity branches. Herein, we report on a 77-year-old female patient with acute upper limb ischemia, treated by PTA using a catheter-guided thrombectomy. He was newly diagnosed with paroxysmal AF (PAF) while evaluation the cause of his acute arterial thromboembolism. We recommend that cardiologists always consider PAF as a possible diagnosis even in patients without any history of AF under ALI because it is possible to develop thromboembolism in clinical practice.
Acute upper limb ischemia in a patient with newly diagnosed paroxysmal atrial fibrillation
Kim, Dong Shin,Kim, Seunghwan,Min, Hyang Ki,Song, Chiwoo,Kim, Young Bin,Kim, Sae Jong,Park, Ji Young,Ryu, Sung Kee,Choi, Jae Woong Yeungnam University College of Medicine 2017 Yeungnam University Journal of Medicine Vol.34 No.2
Acute limb ischemia (ALI) due to an embolism is associated with high mortality rate and poor prognosis, and early diagnosis with prompt revascularization is required to reduce the risk of limb amputation or even death. The etiologies of ALI are diverse, and it includes an embolism from the heart and thrombotic occlusion of the atherosclerotic native vessels, stents, or grafts. An uncommon cause of ALI is acute arterial thromboembolism, and atrial fibrillation (AF) is the single most important risk factors for systemic thromboembolism. It is important to correctly identify the source of ALI for secondary prevention, as it depends on the underlying cause. Percutaneous transluminal angioplasty (PTA) has been proven to be a safe and effective treatment for focal atherosclerotic and thrombotic occlusive diseases of the aorta and its major extremity branches. Herein, we report on a 77-year-old female patient with acute upper limb ischemia, treated by PTA using a catheter-guided thrombectomy. He was newly diagnosed with paroxysmal AF (PAF) while evaluation the cause of his acute arterial thromboembolism. We recommend that cardiologists always consider PAF as a possible diagnosis even in patients without any history of AF under ALI because it is possible to develop thromboembolism in clinical practice.