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음식물 의존성 운동 유발성 아나필락시스: 국내 다기관 후향적 연구
임재형 ( Jae Hyoung Im ),권혜윤 ( Hea Yoon Kwon ),예영민 ( Young Min Ye ),박해심 ( Hae Sim Park ),김태범 ( Tae Bum Kim ),최길순 ( Gil Soon Choi ),김주희 ( Joo Hee Kim ),장광천 ( Gwang Cheon Jang ),김미경 ( Mi Kyung Kim ),허규영 ( 대한소아알레르기호흡기학회 1991 소아알레르기 및 호흡기학회지 Vol.1 No.3
Purpose: To investigate the causes, clinical features and characteristics of food-dependent exercise-induced anaphylaxis (FDEIA) in Korea. Methods: A retrospective medical chart review was performed on the patients diagnosed with anaphylaxis between 2007 and 2011 in 14 hospitals in Korea. Cases with FDEIA were subsequently identified among anaphylaxis patients, and subgroup analyses were done to assess clinical characteristics of FDEIA. Results: A total of 62 subjects with FDEIA (male, 72.6%; aged 16 to 70 years) were enrolled in 10 hospitals. Wheat (69.3%) was the most common cause of FDEIA, followed by meat (8.1%), seafood (6.5%), and vegetables (6.5%). The clinical manifestations were cutaneous (100%), respiratory (64.5%), cardiovascular (61.3%), and gastrointestinal (9.7%), respectively. In severity assessment, approximately 40% of FDEIA were classified as severe anaphylaxis. Portable epinephrine auto-injector was prescribed to 17.2% of patients, and about one fifth of the patients experienced redevelopment of anaphylactic symptoms during follow-up period. There was no significant difference of age, gender, latent period, total immunoglobulin E, and past history of allergic disease between patients with severe anaphylaxis group and patients with mild-to-moderate group. Conclusion: Wheat is the most common cause of FDEIA in Korea. Because significant number of patients with FDEIA experienced anaphylactic symptoms after diagnosis of FDEIA, more comprehensive therapeutic and educational approaches will be required to prevent recurrent development of anaphylaxis. (Allergy Asthma Respir Dis 2013;1:203-210)
음식물 의존성 운동 유발성 아나필락시스: 국내 다기관 후향적 연구
임재형 ( Jae Hyoung Im ),권혜윤 ( Hea Yoon Kwon ),예영민 ( Young Min Ye ),박해심 ( Hae Sim Park ),김태범 ( Tae Bum Kim ),최길순 ( Gil Soon Choi ),김주희 ( Joo Hee Kim ),장광천 ( Gwang Cheon Jang ),김미경 ( Mi Kyung Kim ),허규영 ( 대한천식알레르기학회 2013 Allergy Asthma & Respiratory Disease Vol.1 No.3
Purpose: To investigate the causes, clinical features and characteristics of food-dependent exercise-induced anaphylaxis (FDEIA) in Korea. Methods: A retrospective medical chart review was performed on the patients diagnosed with anaphylaxis between 2007 and 2011 in 14 hospitals in Korea. Cases with FDEIA were subsequently identified among anaphylaxis patients, and subgroup analyses were done to assess clinical characteristics of FDEIA. Results: A total of 62 subjects with FDEIA (male, 72.6%; aged 16 to 70 years) were enrolled in 10 hospitals. Wheat (69.3%) was the most common cause of FDEIA, followed by meat (8.1%), seafood (6.5%), and vegetables (6.5%). The clinical manifestations were cutaneous (100%), respiratory (64.5%), cardiovascular (61.3%), and gastrointestinal (9.7%), respectively. In severity assessment, approximately 40% of FDEIA were classified as severe anaphylaxis. Portable epinephrine auto-injector was prescribed to 17.2% of patients, and about one fifth of the patients experienced redevelopment of anaphylactic symptoms during follow-up period. There was no significant difference of age, gender, latent period, total immunoglobulin E, and past history of allergic disease between patients with severe anaphylaxis group and patients with mild-to-moderate group. Conclusion: Wheat is the most common cause of FDEIA in Korea. Because significant number of patients with FDEIA experienced anaphylactic symptoms after diagnosis of FDEIA, more comprehensive therapeutic and educational approaches will be required to prevent recurrent development of anaphylaxis. (Allergy Asthma Respir Dis 2013;1:203-210)
임재형 ( Jae Hyoung Im ),김민수 ( Min Su Kim ),이승연 ( Seung Yoen Lee ),김소헌 ( So Hun Kim ),홍성빈 ( Seong Bin Hong ),남문석 ( Moon Suk Nam ),김용성 ( Yong Seong Kim ) 대한내과학회 2012 대한내과학회지 Vol.83 No.1
Acute esophageal necrosis is a rare clinical entity characterized by the endoscopic finding of extensive black discoloration of the esophageal mucosa. Acute esophageal necrosis in a patient with diabetic ketoacidosis has rarely been reported. We report a case of acute esophageal necrosis in a patient with diabetic ketoacidosis. The patient had coffee ground emesis and, after an esophago-gastroduodenoscopy with mucosal biopsy, acute esophageal necrosis was diagnosed. The patient was treated conservatively with an intravenous proton pump inhibitor and oral sucralfate without any complications.
출력기반 적응제어기법을 이용한 틸트로터 항공기의 회전익 모드 설계연구
하철근(Cheolkeun Ha),임재형(Jae-hyoung Im) 한국항공우주학회 2010 韓國航空宇宙學會誌 Vol.38 No.3
본 논문에서는 틸트로터 항공기의 회전익 모드에 대한 자율비행 유도제어 알고리즘을 적응제어기법을 이용하여 설계하는 것이다. 이를 위해 우선 출력기반 근사적 궤환선형화 기법을 통하여 알고리즘의 내부루프를 구성하고 그로부터 발생하는 모델오차를 단일 은닉층-신경망을 적용하여 상쇄하였다. 그리고 리아푸노프 안정성 이론에 따른 적응제어 갱신법칙은 선형 관측기를 기반으로 설계하였다. 나아가 외부루프는 경로점 유도법칙으로부터 생성되는 궤적을 추종하도록 하였으며 특히 엄밀한 자동착륙 궤적추종 성능 향상을 위하여 방향각 및 비행경로각 시선유도법칙을 설계하였다. 틸트로터 비선형 모델 시뮬레이션 결과는 콜렉티브 입력에서 보이는 순간적인 작동기 포화현상 이외에는 만족할 만한 안정성과 추종성능을 보여 주고 있다. This paper deals with an autonomous flight controller design problem for a tilt-rotor aircraft in rotary-wing mode. The inner-loop algorithm is designed using the output-based approximate feedback linearization. The model error originated from the feedback linearization is cancelled within allowable tolerance by using single-hidden-layer neural network. According to Lyapunov direct stability theory, the adaptive update law is derived to run the neural network on-line, which is based on the linear observer dynamics. Moreover, the outer-loop algorithm is designed to track the trajectory generated from way-point guidance. Especially, heading and flight-path angle line-of-sight guidance are applied to the outer-loop to improve accuracy of the landing tracking performance. The 6-DOF nonlinear simulation shows that the overall performance of the flight control algorithm is satisfactory even though the collective input response shows instantaneous actuator saturation for a short time due to the lack of the neural network and the saturation protection logic in that loop.
Lidocaine에 의한 아나필락시스 및 특이 immunoglobulin E 측정
여진엽 ( Jin Yeop Yeo ),김경은 ( Gyung Eun Kim ),한주영 ( Ju Young Han ),임재형 ( Jae Hyoung Im ),박성욱 ( Sung Wook Park ),김철우 ( Cheol Woo Kim ) 대한천식알레르기학회 2013 Allergy Asthma & Respiratory Disease Vol.1 No.1
Although local anesthetics can cause adverse drug reactions (ADRs), most ADRs to local anesthetics are from vasovagal, toxic, or anxiety reactions, while immunoglobulin E (IgE)-mediated anaphylaxis is extremely rare. We report a case of IgE-mediated anaphylactic reaction to lidocaine. A 27-year-old male patient who had two episodes of anaphylactic reactions after local injection of lidocaine was referred to our clinic for the safe use of local anesthetics for the subsequent dental procedure. Skin prick and intradermal tests were performed with amide local anesthetics; lidocaine, bupivacaine, mepivacaine, and ropivacaine. Lidocaine and mepivacaine showed positive response in prick test, and lidocaine, mepivacaine, and bupivacaine showed positive reactions in intradermal test. Only ropivacaine showed negative response both in prick and in intradermal test, and the patient was successfully treated with it. To detect serum-specific IgE, we prepared lidocaine-human serum albumin (HSA) conjugate. Enzyme-linked immunosorbent assay result showed high level of specific IgE to lidocaine-HSA conjugate in serum of the patient. This case suggests that local anesthetics can elicit specific IgE-mediated allergic reactions, and both skin prick and intradermal test should be performed in case of suspected IgE-mediated allergic response to local anesthetics. (Allergy Asthma Respir Dis 1(1):98-101, 2013)
Staphylococcus lugdenensis에 의한 요근 농양
채명훈 ( Myoung Hun Chae ),주호연 ( Ho Yeon Joo ),이현정 ( Hyun Jung Lee ),김진철 ( Jin Chul Kim ),백지현 ( Ji Hyeon Baek ),임재형 ( Jae Hyoung Im ),이진수 ( Jin Soo Lee ) 대한내과학회 2014 대한내과학회지 Vol.86 No.3
Staphylococcus lugdunensis is a member of coagulase-negative staphylococci (CoNS), an uncommon microbial culture isolate with virulent potency. Although CoNS are common skin commensals, and often regarded as contaminants or colonizers when isolated from clinical specimen cultures, the clinical course and microbiological characteristics of Staphylococcus lugdunensis may resemble those of Staphylococcus aureus rather than other CoNS. Invasive infectious diseases such as infective endocarditis, peritonitis, skin and soft tissue infection, vascular prosthetic infection, septicemia, and osteomyelitis have been found to be associated with Staphylococcus lugdunensis. Here we report the first case of psoas abscess caused by methicillin-sensitive Staphylococcus lugdunensis in Korea.