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한용철 ( Yong Choi Han ) 대한내과학회 1973 대한내과학회지 Vol.16 No.1
166 forced expiratory spirogram and maximal voluntary ventilation maneuver tracings were exsmined for the presence of acute decrease in the expiratory flow and was found in the expiratory slopes of MVV tracings in 81 tracings without on forced expirogram a
심부정맥 혈전증 및 폐전색증의 핵의학적 진단 및 임상상에 관한 분석
이경한(Kyung Han Lee),최창운(Chang Woon Choi),정준기(June Key Chung),이명철(Myung Chul Lee),김건열(Keun Youl Kim),고창순(Chang Soon Koh),한용철(Yong Chol Han) 대한내과학회 1989 대한내과학회지 Vol.37 No.4
N/A Pulmonary embolism (PE) is a disease caused by occlusion of the pulmonary vascular bed, usually by a dislodged thrombus whose origin is most commonly from the deep venous system of the lower extremities. It is a serious medical problem and is often the cause of significant morbidity or mortality in clinical practice. Its potential for significant sequelae necessitates its prompt recognition and managemnt. Unfortunately, however, there are many difficult problems in the accurate diagnosis of pulmonary embolism, and controversy exists as to which method of approach is best. Futhermore, the low reliability of clinical signs and symptoms adds to the confusion, In an attempt to better understand the clinical features of pulmonary embolism and to reevaluate the diagnostic value of radionuclide studies in this disease entity, we reviewed the clinical features, lung perfusion scans and radionuclide venographic studies of 71 patients who were diagnosed as having deep vein thrombosis (DVT). The results were as follows; 1) The DVTs were most commonly located in the lower extremities (67%), and of these, the left side showed a significantly higher incidence compared to the right (77% vs 23%). 2) Of the DVT patients, 40% showed high probability pulmonary embolism (HPPE) on lung perfusion scans. 3) DVTs involving the iliofemoral veins were more likely to present HPPE compared to those confined to the calf area. 4) Of the patients presenting with HPPE, 70% showed no chest symptoms. Thus, the high incidence of HPPE in patients with DVT and the few, if any, specific presenting symptoms in the majority of PE patients call for a high level of suspicion on the part of the physician. The combined use of radionuclide venography and lung perfusion scan seems to be a reasonable approach for patients suspected of DVT in order to evaluate the possibilitu of pulmonary embolism.
내독소에 의한 혈관 내피세포 손상에서 혈관 내피세포로부터 유리된 산소기의 역할에 관한 연구
최형석 ( Hyung Seok Choi ),정기호 ( Ki Ho Jeong ),유철규 ( Chul Gyu Yoo ),김영환 ( Young Whan Kim ),한성구 ( Sung Koo Han ),심영수 ( Young Soo Shim ),김건열 ( Keun Youl Kim ),한용철 ( Yong Chol Han ),정기석 ( Ki Suck Jung ) 대한결핵 및 호흡기학회 1994 Tuberculosis and Respiratory Diseases Vol.41 No.4
고연령층에서의 세포성면역의 변화에 관한 연구 - 비특이적 자극에 대한 T - 세포와 폐포대식세포의 반응을 중심으로 -
한성구(Sung Koo Han),이계영(Kye Young Lee),최형석(Hyung Seok Choi),정희순(Hee Soon Chung),김영환(Young Whan Kim),심영수(Young Soo Shim),김건열(Keun Youl Kim),한용철(Yong Chol Han) 대한내과학회 1994 대한내과학회지 Vol.46 No.6
Background: T-cells and macrophages are the two elements that play the key roles in cell-mediated immunity. Based on the evidences for the involution of thymus occuring as the age become older, the cell-mediated immunity is expected to be altered in geriatric population. Moreover, the T-cell proliferatve response to non-specific stimulants such as phytohemagglutinin (PHA) is known to be decreased in aged population. However, there has been no convincing evidences for the functional decline of macrophages in aged population. The alterations of immune system accompanied by the increase in age have the clinical significances in that the geriatric population is much more susceptible to the diseases such as infectious, neoplastic, and autoimmune diseases where the immune system is proved to play a great role in their pathogenesis. To evaluate the alteration of cell-mediated immunity in old age, we investigated the responses of T-cell and alveolar macrophages from healthy geriatric population, and compared them with those of the young control population. Method: To evaluate the alterations of T-cell function, lymphoblastogenesis in response to concanavalin-A (Con-A) and PHA was measured by 3H-thymidine incorporation method and high affinity IL-2 receptor expression (Tac antigen) after stimulation with PHA was measured by flow cytometry using peripheral blood mononuclear cells from young and old age group, respectively. To evaluate the alterations of macrophage function, superoxide anion productions by alveolar macrophages both in basal state and in response to phobol myristate acetate (PMA) were measured and the priming effect of interferon-gamma was also compared. Results: 1) The lymphoblastogenesis in response to Con-A and PHA was significantly depressed in old age group compared with young control group. 2) The expression of high affinity IL-2 receptor after stimulation with PHA was also significantly depressed in old age group. 3) There was no difference in the superoxide anion production by alveolar macrophages between old age group and young control group both in basal state and after PMA stimulation. 4) There was no priming effect of interferon-gamma pretreatment in both old age group and young control group. Conclusion: The functional defect of T-cells associated with aging is evident but that of alveolar macrophages is not conclusive. It is suggested that the alterations of T-cells play a more important role than macrophages in the depression of cell-mediated immunity accompanied by aging process than macrophages but there remain many palces of further investigation in the functional changes of macrophages associted with aging.