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The Management of Open Pelvic Fractures: A Report of 2 Cases
( Byungchul Yu ),( Gil Jae Lee ),( Min A Lee ),( Kangkook Choi ),( Jihun Gwak ),( Youngeun Park ),( Yong-cheol Yoon ),( Jungnam Lee ) 대한외상학회 2020 大韓外傷學會誌 Vol.33 No.4
Open pelvic fractures are rare, but pose challenges for trauma surgeons due to their high morbidity and mortality. Generally, early death results from uncontrolled exsanguination and late death is related to pelvic sepsis. Therefore, management of these injuries should prioritize hemostasis and contamination control starting in the initial phase of treatment. We report two cases of unstable open pelvic fractures with perineal wounds that were managed successfully.
Some Evidence on the Asymmetry of Interest Rate Pass-Through in Asian Economies
Byungchul Yu,Sun Eae Chun,Jongchai Kim 한국경제연구학회 2013 Korea and the World Economy Vol.14 No.2
In this paper, we empirically investigate interest rate pass-through (IRPT) from policy rates to bank lending rates in eight Asian countries by employing nonlinear autoregressive distributed lag (NARDL) model developed by Shin, Yu, and Greenwood (2009), which allows us to capture both short-term and long-term asymmetries in transmission process. We find incomplete pass-through in Hong Kong, Indonesia, Thailand and the Philippines to varying degrees and in Japan in a limited case, which may come from a mixture of several factors such as fixed menu costs, high switching costs, imperfect competition and asymmetric information. We find over pass-through in Korea, which suggests that Korean banking sector is highly competitive. Regarding long-run asymmetry, we are able to find positive long-run asymmetric pass-through for Hong Kong and Korea and negative one for Indonesia and Thailand. Banks in Korea and Thailand also exhibit asymmetries in the speed of adjustment. We are not able to find any meaningful interest rate pass-through in Malaysia and Singapore.
( Byungchul Yu ),( Gil Jae Lee ),( Kang Kook Choi ),( Min A Lee ),( Jihun Gwak ),( Youngeun Park ),( Jung Nam Lee ) 대한외상학회 2020 大韓外傷學會誌 Vol.33 No.3
Purpose: There is increasing evidence in the literature regarding resuscitative endovascular balloon occlusion of the aorta (REBOA) globally, but few cases have been reported in Korea. We aimed to describe our experience of successful Zone III REBOA and to discuss its algorithm, techniques, and related complications. Methods: We reviewed consecutive cases who survived from hypovolemic shock after Zone III REBOA placement for 4 years. We reviewed patients’ baseline characteristics, physiological status, procedural data, and outcomes. Results: REBOA was performed in 44 patients during the study period, including 10 patients (22.7%) who underwent Zone III REBOA, of whom seven (70%) survived. Only one patient was injured by a penetrating mechanism and survived after cardiopulmonary resuscitation. All patients underwent interventions to stop bleeding immediately after REBOA placement. Conclusions: This case series suggests that Zone III REBOA is a safe and feasible procedure that could be applied to traumatic shock patients with normal FAST findings who receive a chest X-ray examination at the initial resuscitation.
Yu Byungchul,이지연,Kim Yong Beom,박희연,Jung Junsu,조윤이 대한외상학회 2023 大韓外傷學會誌 Vol.36 No.3
Neuroleptic malignant syndrome (NMS) is a rare but fatal condition, with a high mortality rate. NMS is characterized by altered mental status, fever, myoclonus, autonomic dysfunctions, and elevated creatinine phosphokinase. The clinical manifestations may be confused with alcohol-related symptoms, trauma, sepsis, postoperative agitation, or malignant hyperthermia. A 69-year-old male patient with alcohol withdrawal was admitted to the operating theatre to rule out septic shock due to mesenteric injury after multiple trauma. He was suspected NMS with abrupt increase body temperature to 41.7°C after haloperidol administration. Active cooling and rapid fluid infusion was done during anesthesia. Delayed diagnosis and treatment of NMS lead to catastrophic result. Therefore, if the patient's past medical history is unknown or clinical symptoms develop that are suggestive of NMS, early treatment must be considered.
Trauma Volume and Performance of a Regional Trauma Center in Korea: Initial 5-Year Analysis
( Byungchul Yu ),( Giljae Lee ),( Min A Lee ),( Kangkook Choi ),( Sungyoul Hyun ),( Yangbin Jeon ),( Yong-cheol Yoon ),( Jungnam Lee ) 대한외상학회 2020 大韓外傷學會誌 Vol.33 No.1
Purpose: We aimed to evaluate the trauma volume and performance indicators during the first 5-year period of operation in a single regional trauma center. Methods: We analyzed prospectively collected data from the Korean Trauma Data Bank for a single regional trauma center between January 2014 and December 2018. More than 250 variables were analyzed. We calculated the predicted survival rates using the trauma and injury severity score (TRISS) method. Results: In total, there were 16,103 trauma admissions during the first 5 years; trauma activation was performed in 5,105 of these cases. Over 70% of the patients were men, and most of the admitted patients were within the age groups of 55-59 years for men and 75-79 years for women. Analyses were performed considering two patient groups: the total patient group and the group of those with severe trauma (injury severity score [ISS] >15). The median ISS, revised trauma score, and TRISS of the two groups were 5 (interquartile range [IQR] 4-10), 22 (IQR 17-27), and 7.6±0.99 and 6.74±1.9, 0.95±0.13, 0.81±2.67, respectively. Of the total patient group, 801 patients (5%) died in the hospital, whereas of the group of patients with ISS >15, 526 (19.5%) died. The direct transportation of patients to the regional trauma center increased year by year. The emergency room stay time and time to entering the operating room showed a decrease until 2017; however, these parameters increased again in 2018. Conclusions: The trauma volume in the regional trauma center is appropriate, and some improvements could be observed after its establishment. However, performance indicators reveal the prematurity of the trauma center and its potential for further improvements. Moreover, the development of a national trauma system, beyond regional trauma centers, is required.
컨테이너선 용선료 결정요인: 코로나19 발생 전후 비교
유병철(Byungchul Yu),신성호(Sung-Ho Shin),노영진(Young-Jin Ro) 충남대학교 경영경제연구소 2021 경영경제연구 Vol.43 No.3
컨테이너 선사들에게 용선 여부와 용선료, 용선 기간에 대한 의사결정은 매우 중요하며, 이를 위해 선사들은 해운시장을 분석하고 전망한다. 그러나 컨테이너선 시장에서의 용선료 결정요인에 관한 연구는 많지 않다. 본 연구에서는 컨테이너 시장의 수요와 공급 그리고 세부계약내용과 관련된 변수들을 선정하여 용선료에 미치는 영향을 살펴보는데 연구목적을 둔다. 이를 위해, 2018년 1월부터 2020년 9월까지의 기간의 총 5,071건의 컨테이너선 용선계약 자료를 활용하여 수요측면의 세계물동량, 공급측면의 선복량, 계약내용과 관련된 선령, 용선 기간, 선박의 크기 등이 TEU당 일일 용선료에 미치는 영향을 실증적으로 분석하였다. 실증분석 결과, 선령, 선박의 크기 그리고 선복량은 TEU당 일일 용선료에 음(-)의 영향을, 계약기간과 전 세계물동량은 용선료에 양(+)의 영향을 주는 것으로 나타났고, 이는 모두 통계적으로 유의하였다. 또한 2020년부터 시작된 코로나19가 컨테이너선 용선시장의 구조적 변화를 초래하였는지를 분석한 결과, 코로나19는 컨테이너선 용선시장에 구조적 변화를 야기하였는데 TEU당 일일 용선료에 양(+)의 효과를 유발하는 용선 기간과 해운수요의 영향은 코로나 이후 감소하였고, 반면에 음(-)의 효과를 유발하는 선복량의 영향은 확대된 것으로 나타났다. 본 논문은 컨테이너 시장에서의 용선료를 결정하는 다양한 요인들을 실증적으로 살펴보고, 코로나19 발생으로 인한 시장의 구조적 변화를 검정하였다는데 의의가 있다. Since chartering is an important strategy for container shipping company, it is critical to analyze and forecast chartering market by considering the cost of charter, the duration of charter and etc. However, few studies have been conducted on finding the factors affecting containership charterage. In this paper, we conduct an empirical analysis to find the factors affecting charterage in the container shipping market. Using data from 5,071 container ship charter contracts from January 2018 to September 2020, we investigate whether variables such as ship age, charter period, ship size, total container fleet, and world trade volume variables would affect charterage per tonnage in containership market, and also whether the occurrence of COVID-19 would cause any structural change in this relationship. We find that the ship age, ship size, and total container fleet had a negative (-) effect on the charterage per tonnage, while the contract period and world trade volume had a positive (+) effect on the charterage, all of which are statistically significant. Additionally, we find evidence that COVID-19 causes a structural change in the containership charter market. More specifically, It turns out that COVID-19 decreases the positive effect of the charter period and shipping demand on charterage while increases the negative effect of total container fleet on it. This study contributes to the literature by empirically examining the various factors that influence containership charterage and finding structural changes in containership charter market that were caused by the COVID-19 outbreak.