우하복부 통증을 주소로 내원한 복막수염(Epiploic Appendagitis) 1예

강효철,남지형,전세윤,유경희,김영통,Kang, Hyo Cheol,Nam, Ji Hyung,Jeon, Se Yun,Yoo, Gyeong Hee,Kim, Young Tong 대한소아소화기영양학회 2006 Pediatric gastroenterology, hepatology & nutrition Vol.9 No.1

저자들은 우하복부 통증을 주소로 내원한 11세 남아에서 복부 초음파와 복부 컴퓨터 단층 촬영으로 복막수염을 진단하고, 대증 요법만으로 회복된 증례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. An inflammation of an epiploic appendage is a relatively rare cause of acute abdominal pain. It can be clinically misdiagnosed as either acute appendicitis or diverticulitis. Judicious interpretation of imaging with ultrasound or computed tomography may lead to an early diagnosis and prevent unnecessary surgical or medical treatment. Conservative treatment of symptoms is usually sufficient. We have experienced a case of epiploic appendagitis treated by conservative management and report this case with the review of the literature.

경형 표준 전석 시트 프레임 개발

강효철(Hyocheol Kang),나선채(Seonchae Na),최병용(Byungyong Choi),김지현(Jihyun Kim),조한결(Hankyeol Cho),유소영(Soyoung Yoo),이종탁(Jongtak Lee) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5

The demand of car increases steadily in developing country(India, China, Brazil). Hyundai Motor Company makes every possible effort, for example adjusting upward the number of Car Manufacture for gaining share sales in developing country. For gaining cost competitiveness improvement, seat frame of previous version is applied in the automobile which is exported to developing country. But it doesn’t have enough weight competitiveness than rival car’s seat. Because of this reason, we must develop seat frame of new version which has light weight and enough strength.

F-140 : Free Paper Presentation ; The Prevalence and Diagnostic Value of Toxocariasis in Patients with Pulmonary Eosinophilic Infiltrates in Chungcheongnam-do

김영일,강효철,이호성,최재성,류지원,김용훈,나주옥 대한결핵 및 호흡기학회 2013 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.116 No.-

Objective: Toxocariasis is one of the causes of eosinophilic infiltration in internal organs and also increasing in Korea. The aim of this study is to evaluate the causes of pulmonary eosinophilic infiltrates (PIE) and also analyze the impact of toxocariasis in patients with PIE in Chungcheongnam-do. Design: We retrospectively evaluated the clinical characteristics of total 86 patients with pulmonary eosinophilic infiltrates. Results: The most common causes of PIE were toxocariasis (43%), Loeffler`s syndrome (41.9%), acute eosinophilic pneumonia (5.8%), chronic eosinophilic pneumonia (1.2%), Chrug-strauss syndrome (4.7%), Paragonimiasis (5.8%), and drug induced lung infiltration (1.1%). Among 86 patients, history of raw meat intake was 69.8% (60/86 patients). Between toxocariasis and Loeffler`s syndrome without toxocara seropositivity, there was significant differences in frequency of treatment using albendazole and steroid. In Toxocara seropositive patients, 56.7% of patients are asymptomatic. Symptoms of toxocariasis were consist of cough(13.8%), chest discomfort(8.3%), hemoptysis (2.8%) and sputum (2.8%). Twenty seven patients (75%) have a history of ingestion of raw meat. Conclusion: From these results, we could confirm that toxocariasis is related to PIE with dietary habits of raw meat intake in Chungcheongnam-do. A toxocara infection should be considered in a differential diagnosis of patients who exhibits PIE in Korea. Objective: Toxocariasis is one of the causes of eosinophilic infiltration in internal organs and also increasing in Korea. The aim of this study is to evaluate the causes of pulmonary eosinophilic infiltrates (PIE) and also analyze the impact of toxocariasis in patients with PIE in Chungcheongnam-do. Design: We retrospectively evaluated the clinical characteristics of total 86 patients with pulmonary eosinophilic infiltrates. Results: The most common causes of PIE were toxocariasis (43%), Loeffler`s syndrome (41.9%), acute eosinophilic pneumonia (5.8%), chronic eosinophilic pneumonia (1.2%), Chrug-strauss syndrome (4.7%), Paragonimiasis (5.8%), and drug induced lung infiltration (1.1%). Among 86 patients, history of raw meat intake was 69.8% (60/86 patients). Between toxocariasis and Loeffler`s syndrome without toxocara seropositivity, there was significant differences in frequency of treatment using albendazole and steroid. In Toxocara seropositive patients, 56.7% of patients are asymptomatic. Symptoms of toxocariasis were consist of cough(13.8%), chest discomfort(8.3%), hemoptysis (2.8%) and sputum (2.8%). Twenty seven patients (75%) have a history of ingestion of raw meat. Conclusion: From these results, we could confirm that toxocariasis is related to PIE with dietary habits of raw meat intake in Chungcheongnam-do. A toxocara infection should be considered in a differential diagnosis of patients who exhibits PIE in Korea.

Risk Factors for Mortality in Patients with Candidemia and the Usefulness of a Candida Score

문인기,강효철,유시내,위지완,김태형,추은주,전민혁,박세윤,이은정 대한의진균학회 2013 대한의진균학회지 Vol.18 No.3

Background: Although effective antifungal agents for the treatment of candidemia have recently been introduced, the mortality rate attributed to candidemia remains high (19~49%). Objective: This study aimed at evaluating the risk factors for mortality in patients with candidemia and at assessing the usefulness of a Candida Score in these patients. Methods: A cohort of patients with positive blood cultures for Candida species was retrospectively analyzed at Soonchunhyang University Hospital, a 750-bed teaching hospital, from May 2003 to February 2012. The Candida Score was calculated by assigning 1 point to any of total parenteral nutrition (TPN),surgery, or multifocal Candida species colonization, and 2 points to severe sepsis. Results: Sixty patients (68.3% men; mean age (standard deviation [SD]), 61.8 [18.9] years) with blood cultures positive for Candida species were identified. Most patients had been admitted to an intensive care unit (48 [80%]), were receiving broad-spectrum antibiotics (37 [61.7%]), had TPN (29[48.3%]), had diabetes mellitus (23 [38.3%]), and were receiving hemodialysis (10 [16.7%]). The mean (SD) Acute Physiology and Chronic Health Evaluation II (APACHE II) score was 19.60 (8.8). Twentythree patients (38.3%) had a Candida Score >2.5. The Candida species causing infection included C. albicans (41 [68.3%]), C. tropicalis (7 [11.7%]), C. parapsilosis (4 [6.7%]), C. krusei (3 [5%]), C. glabrata (3 [5%]), C. guilliermondii (1 [1.7%]), and C. catenulata (1 [1.7%]). Only 32 patients (53.3%)received adequate antifungal treatment. The candidemia-related mortality rate was 61.7% (n = 37patients). Multivariate logistic regression analysis demonstrated that a high APACHE II score (adjusted odds ratio [aOR], 1.2; 95% confidence interval [95% CI], 1.0~1.3; p = 0.01), presence of a malignancy (aOR, 14.8; 95% CI, 2.5~88.0; p = 0.003), and treatment with an antifungal agent (aOR, 0.2; 95% CI,0.0~1.0; p = 0.048) were associated with disease-related mortality. Conclusion: The risk factors for mortality in patients with candidemia are a high APACHE II scores and presence of a malignancy. However, the sensitivity of the Candida Score was not high (38.3%). New methods to rapidly identify candidemia and avoid delays in treatment with appropriate antifungal therapy are needed.

증례 : 호흡기; 쯔쯔가무시병에서 발생된 급성 전격성 심근염 1예

한동재 ( Dong Jae Han ),박희순 ( Hee Soon Park ),김대연 ( Dae Yeon Kim ),강효철 ( Hyo Chul Kang ),이호성 ( Ho Sung Rhee ),이세환 ( Se Whan Lee ),나주옥 ( Ju Ock Na ) 대한내과학회 2013 대한내과학회지 Vol.85 No.6

쯔쯔가무시병은 국내에서 대표적인 가을철 열성 질환의 하나이며 이로 인한 호흡부전이나 신부전은 널리 알려져 있지만 심근염은 질병의 위중함에 미루어 잘 알려져 있지 않은 합병증이다. 저자들은 85세 고령의 여성에서 쯔쯔가무시병을 적절하게 빠른 시일에 진단하였으며 그 후 항균제 투약 등 적절한처치를 시행하였음에도 불구하고 급성 심근염 및 급성 신부전으로 사망한 예를 보고하였다. Scrub typhus is an acute febrile illness caused by Orientia tsutsugamushi that is characterized by focal or disseminated vasculitis and perivasculitis. Scrub typhus can have fatal complications, such as acute respiratory distress syndrome, septic shock, and acute kidney injury. However, there are few reports of fatal myocarditis caused by scrub typhus. We present a case of acute fatal myocarditis combined with acute kidney injury complicating scrub typhus. (Korean J Med 2013;85:623-628)

Development of a Transducer Power Control System for Ultrasonic Cleaning System

Tran Trung Tin(트란 트렁 틴),Dang Van Chien(당 반 치엔),Joon-Ik Sohn(손준익),Hyo-Cheol Kang(강효철),Jong-Wook Kim(김종욱) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.3

The goal of this paper is to implement a systematic controller for transducer power used in an ultrasonic cleaning system to save its consumption power in changing objects to be cleaned. To estimate and observe the current which is produced from the generator, root-mean-square (RMS) values of current signals in the transducer circuit are processed to produce moving average and moving standard deviation values by sliding a window for the most recent data. In this paper, we propose the controller scheme which is implemented with a digital signal processing (DSP) board based on the digital signal controller (DSC) chip to control the transducer power through digital proportional-integral (PI) controller and also applied to a commercial ultrasonic cleaning system for validation under change of cleaning load. The overshoot and undershoot of the current RMS have been decreased by 52.2% and 70.7%, respectively, with faster recovery to the initial current level by the proposed control system.