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만성 신장 질환이 급성 허혈성 뇌졸중의 예후에 미치는 영향
최준석 ( Joon Seok Choi ),김하연 ( Ha Yeon Kim ),옥찬영 ( Chan Young Oak ),김민지 ( Min Jee Kim ),김창성 ( Chang Sung Kim ),오슬현 ( Seul Hyun Oh ),이형철 ( Hyung Chul Lee ),박정우 ( Jeong Woo Park ),배은희 ( Eun Hui Bae ),마성권 대한내과학회 2010 대한내과학회지 Vol.78 No.5
Background/Aims: Chronic kidney disease is recognized as an independent risk factor for coronary artery disease. It is unknown whether renal function predicts clinical outcomes of acute ischemic stroke. The present study was aimed at examining the correlation between the degree of renal dysfunction and stroke outcome. Methods: Our retrospective study included 282 consecutive patients hospitalized due to acute ischemic stroke. Renal function was assessed by the estimated Glomerular filtration rate (GFR), using two methods: Cockcroft-Gault equation and Modification of Diet in Renal Disease (MDRD) equation. Each of the estimated GFRs were categorized into three groups (Group I: ≥60 mL/min/1.73 m2, Group II: 45~59 mL/min/1.73 m2, Group III: 15~44 mL/min/1.73 m2). From collected patient databases, we compared mortality and rate of hospitalization to GFR at 1 month and 12 months follow up. Results: Our study found that, based on the GFR, the 1 year mortality, using the Cockcroft-Gault equation, was 6.0% in group I, 20.3% in group II and 21.1% in group III and, using the MDRD equation, 9.1%, 12.5% and 37.5%, respectively. Patients with lower GFRs exhibited an increased odds ratio for 1 year mortality when estimated by the Cockcroft-Gault equation: 3.97 (1.7~9.2, 95% CI) in group II and 4.16 (1.2~14.5, 95% CI) in group III. Based on the MDRD equation, patients with lower GFRs also exhibited an increased odds ratio for 1-year mortality: 1.43 (0.5~4.4, 95% CI) in group II and 6.00 (1.3~26.8, 95% CI) in group III. The adjusted odds ratio for 1-year mortality also increased based on our analysis using either equation. Conclusions: Decline of GFR and severity of chronic kidney disease are associated with poor clinical outcomes of acute ischemic stroke. (Korean J Med 78:602-609, 2010)
최준석 ( Joon Seok Choi ),윤정환 ( Jeong Hwan Yun ),강홍규 ( Hong Kyu Kang ),손영민 ( Young Min Son ),백진옥 ( Jin Ok Baek ),노주영 ( Joo Young Roh ),이종록 ( Jong Rok Lee ) 대한피부과학회 2011 大韓皮膚科學會誌 Vol.49 No.10
Reed syndrome is an autosomal dominantly inherited disease with incomplete penetrance that is characterized by uterine and cutaneous leiomyoma. While the skin tumors are relatively uncommon and benign, women of affected families often develop uterine leiomyoma with associated infertility, pain and bleeding. Here, we report a case of Reed syndrome in a family with multiple cutaneous and uterine leiomyomas. A 30-year-old woman had not only multiple cutaneous leiomyomatosis on cheek and neck, but also uterine multiple leiomyoma. Her mother had lesions that the multiple cutaneous leiomyomatosis on both shoulders and underwent myomectomy for a huge uterine leiomyoma at the age of 45. Her older sister also underwent myomectomy for uterine leiomyoma. (Korean J Dermatol 2011;49(10):957∼960)
최준석 ( Joon Seok Choi ),김지훈 ( Ji Hoon Kim ),윤정환 ( Jeong Hwan Yun ),강홍규 ( Hong Kyu Kang ),백진옥 ( Jin Ok Baek ),이종록 ( Jong Rok Lee ),노주영 ( Joo Young Roh ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.11
Pityriasis rubra pilaris (PRP) is a chronic papulosquamous disorder of unknown etiology, which may pose therapeutic challenges. There is currently no universally effective treatment for PRP, and some cases are resistant to multiple topical and systemic therapies. Systemic retinoids, methotrexate, several immunosuppressive agents and phototherapy have all been used with varying degrees of success. Recently, a few reports have appeared in the literature, concerning the use of biologics in combination therapies and/or in refractory PRP cases. We report a case of PRP similar to type II with juvenile onset, which was recalcitrant to traditional topical and systemic therapy. He was successfully treated with anti-TNF-α monoclonal antibody, infliximab. The patient showed resolution with minimal disease activity, and was maintained on acitretin and emollients. The response to infliximab in our patient and in the previously reported cases confirms a role of anti-TNF-α therapy as an effective option in the treatment of PRP. (Korean J Dermatol 2012;50(11):982∼986)
손가락에 다수 발생한 진피에 국한된 연부 조직 신경주막종
김지훈 ( Ji Hoon Kim ),최준석 ( Joon Seok Choi ),윤정환 ( Jeong Hwan Yun ),강홍규 ( Hong Kyu Kang ),이종록 ( Jong Rok Lee ),노주영 ( Joo Young Roh ),김태은 ( Tae Eun Kim ),안정석 ( Jeong Seok Ahn ),백진옥 ( Jin Ok Baek ) 대한피부과학회 2013 대한피부과학회지 Vol.51 No.6
Perineurioma is a rare benign peripheral nerve sheath tumor, composed uniformly of perineurial cells. Soft tissue perineurioma primarily arises within the subcutaneous tissue of extremities and trunk as a painless solitary nodule, and should be distinguished from dermatofibroma, neurofibroma, dermatofibrosarcoma protuberans, meningioma and so on. A 25 year-old female is presented with three small asymptomatic papules on the third left finger which were found 3 years ago. Punch biopsy was performed on all of the papules. Microscopic examination demonstrated well-demarcated tumor within dermis, and proliferation of spindle cells with wavy nuclei and elongated bipolar cytoplasmic process, arranged in a whorled pattern. According to immunohistochemical analysis, the tumor cell showed positivity for epithelial membrane antigen, but negativity for S-100 protein, factor XIIIa, CD34, and smooth muscle actin. The diagnosis of soft tissue perineurioma was being made. We report this rare case of perineurioma presented as multiple papules localized within dermis of the digit.
윤정환 ( Jeong Hwan Youn ),최준석 ( Joon Seok Choi ),강홍규 ( Hong Kyu Kang ),손영민 ( Young Min Son ),백진옥 ( Jin Ok Baek ),노주영 ( Joo Young Roh ),이종록 ( Jong Rok Lee ) 대한피부과학회 2011 大韓皮膚科學會誌 Vol.49 No.9
Sweet syndrome or acute febrile neutrophilic dermatosis is characterized by abrupt onset of fever, leucocytosis, and tender erythematous nodules or plaques that respond to systemic corticosteroids. It occurs most commonly in middle aged women and is rare in children. We report a 2-year-old boy with Sweet syndrome who had fever, leukocytosis, neutrophilia and presented with erythematous maculopapules with tiny pustules over the whole body. Additionally he had an antecedent infection. Our evaluation and long term follow-up of this child failed to reveal evidence of an underlying malignancy or a chronic systemic illness. (Korean J Dermatol 2011;49(9):850~852)
메타콜린 상부기도과민성과 상부기도폐쇄의 원인에 관한 연구
김영일 ( Young Il Kim ),최인선 ( Inseon S. Choi ),박동진 ( Dong Jin Park ),김연주 ( Yeon Joo Kim ),조대호 ( Dae Ho Cho ),지수영 ( Soo Yeong Jee ),최준석 ( Joon Seok Choi ),한의령 ( Eui Ryoung Han ) 대한천식알레르기학회 2010 천식 및 알레르기 Vol.30 No.1
Background: Many patients with asthma-like symptoms show upper airway hyperresponsiveness (UHR). However, few investigators have studied the etiologies of UHR. Objective: To investigate the etiologies of UHR. Method: During methacholine bronchoprovocation tests, acceptable inspiratory flow volume curves were obtained. UHR was defined as methacholine concentration causing a 25% fall in maximal mid-inspiratory flow (PC25MIF50) <25 mg/mL and upper airway obstruction (UAO) as maximal mid-expiratory/inspiratory flow ratio >1.0. Result: The PC25MIF50 was significantly related to bronchial hyperresponsiveness index (r=0.68, P<0.001), blood eosinophil counts (r=-0.31, P<0.01) and serum total IgE level (r=-0.24, P<0.05). More than half of the patients with UHR/UAO had concurrent allergic rhinitis and the abnormality in paranasal sinus X-rays. Sixty-six (64.1%) of the 103 patients with UHR or UAO were female. The prevalence of smoking, blood eosinophilia, increased IgE levels and positive skin tests was significantly lower in women than in men. Women were significantly older than men (P<0.01) and had a higher prevalence of UAO (P<0.05). Conclusion: UHR or UAO seems to be most closely associated with allergy and bronchial hyperresponsiveness. However, women had a higher prevalence of UAO which may be related to non-allergic factors such as a smaller airway caliber. (Korean J Asthma Allergy Clin Immunol 2010;30:21-29)
인코넬 617을 이용한 고온고압용 미세채널 열교환기의 확산접합 공정에 관한 연구
송찬호(Chan Ho Song),윤석호(Seok Ho Yoon),최준석(Joon Seok Choi) 대한설비공학회 2015 설비공학 논문집 Vol.27 No.2
Recently, the heat exchangers are requiring higher performance and reliability since they are being used under the operating condition of high temperature and pressure. To satisfy these requirements, we need special materials and bonding technology. This study presents a manufacturing technology for high temperature and high pressure micro channel heat exchanger using Inconel 617. The bonding performance for diffusion bonded heat exchanger was examined and analyzed. The analysis were conducted by measuring thermal and mechanical properties such as thermal diffusivity and tensile strength, and parametric studies about bonding temperature and pressing force were also carried out. The results provided insight for bonding evaluation and the bonding condition of 1200℃, and 50 tons was found to be suitable for this heat exchanger. From the results, we were able to establish the base technology for the manufacturing of Inconel 617 heat exchanger through the application of the diffusion bonding.