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유소영,박찬영,정석,김동익,이병붕,허세호,한동철,장준근 대한혈관외과학회 2002 Vascular Specialist International Vol.18 No.2
Purpose: The spreading, orientation, and chemotaxis the gradient of a chemoattractant of smooth muscle cells (SMCs) were studied on the micro-grooved substrata by the light, fluorescence and scanning electron microscopy. Method: Vertical-walled grooves were produced in silicon wafers by the micromachining technique. All grooves were 4~20㎛ deep and 10~80㎛ wide, SMCs were cultured on each microgroove and examined under stereo-microscope. Result: Cell clusters were markedly oriented by all the grooved substrata examined. Tim-lapse images acquired from CCD (Charge Coupled Device) showed that the grooves directed the migration of SMCs. There was no prominent difference in the migration speed of SMCs according to the grooves. All the cytoskeletal fibers were reoragnized in the same direction with grooves. Especially the alignments of microtubule and intermediate filaments were distinguished in the SMCs on the micro grooves. Conclusion: These results could be applied to the analysis of vascular restenosis and the development of artificial blood vessels.
정윤석,김준식,유인술,조준필 大韓應急醫學會 1996 대한응급의학회지 Vol.7 No.1
Early reperfusion can prevent myocardial necrosis, and clinical trials with reperfusion therapy demonstrating a significant reduction in acute myocardial infarction(AMT) mortality have dramatically changed the treatment paradigm for AMI. All patients with symptoms and ECG findings suggestive of AMI should be considered for treatment with thrombolytic agents. However, only a minority of AMI patients actually receive a thrombolytic therapy. Many patients are often excluded from treatment because they do not meet the criteria for age, duration of the chest pain, and a qualifying ECG. And late arrival at the hospital is a frequently cited reason for not giving a thrombolytic agent. To confirm the reason for not receiving an early reperfusion therapy, we obtained the data for the clinical characteristics, the time intervals between the symptom onset and the start of a thrombolytic agent infusion, the method of reperfusion therapy, the reason for not giving a thrombolytic agent and overall outcomes by retrograde chart review. During the 12-month study period between July 1994 and June 1995, 113 patients were finally diagnosed to AMI, who presented to Emergency Center of Ajou University Hospital in total 30,819 patients. The results were followings: 1. The average age was 59±12 years old, the ratio of male to female was 3.2:1. The direct visited patients to our hospital were 31 and the transfered were 82. 2. The chief complaints were chest pain(86.7%), dyspnea, dyspnea, and mental change. The common preceding diseases were angina pectoris(10 cases), old myocardial infarction(9 cases), congestive heart failure(2 cases) and typical chest pain but not diagnosed(23 cases). The risk factors were smoking(81 cases), hypertension (46 cases) and DM (22 cases). 3. 75 patients had arrived within 12 hours from symptom onset and 38 patients after 12 hours. 45cases (54.7%) were performed the reperfusion therapy ; 31 patients were taken the thrombolytic therapy by tissue-type Plasminogen Activator. 4. The most common reason for not receiving a reperfusion therapy was the time delay and the main was the patient/bystander factor. 5. 75.2%(85 cases) of the patients discharged with or without complications, 7.1% (8 cases) died, 10.6% (12 cases) discharged moribundly, and 7.1% (8 cases) discharged against advise. In conclusion, the time delay was the first reason for not receiving a reperfusion therapy in AMI patients. And the education for the AMI symptom and BLS (Basic Life Support) to the people, good EMS(Emergency Medical Service) system, early definite diagnosis and aggresive therapy may decline the mortality rate.
이상철,유송근,박준석,김병주 龍仁大學校 1998 용인대학교 논문집 Vol.15 No.-
It is neccesary to facilitate the developments of the systems, principles and instructions of guarding in order that the security guard be able to meet the needs of the environments of guarding regardless what kind of government system our country may be. The guard also need the nationality and brilliant brains rather than the political power so that the guarded be safe always and everywhere and all people in the country feel peaceful and safe, which requires it that every bodyguard investigate and develope the new technology of guarding through reasonable and scientific methods. And I think followings are necessary for the development and advance of future the Security guard : the strong relations with the related organizations, the education facilities for supporting good and strong bodyguards, the related information bureau with mood image against the internation terror croups, and professionalization for better adaption in the idustralized various society, and the department for study on the principles of guarding. In addition to those, it would be important to be equipped with enough amarments and strong wills. Anyway, the next 21th century requires big change of the everyone's opinions on guarding and it would not be impossible to provide complete guard with only the system of guard itself, so it needs everyone's help. Of course will it require the professionals of Information technology too, in the future information society. I suggest that it need to combine various functions and specialize each fuction of the security guard at the same time. Then it would be more easy to maintain the system to prevent the future dangers, so to acomplish the complete guarding system. As a conclusion, it would be possible to meet the 21th environment of guarding only with the scientific, reasonable and specialized guard system.
Sheehan 증후군 발생한 Torsades de Pointes
김승환,김남호,김용철,최준호,박은미,이상재,이은미,유남진,윤경호,오석규,정진원 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.1
재발하는 심실 빈맥으로 내원한 환자에서 Sheehan 증후군을 진단하였고, 적절한 호르몬 보충 치료 후 심전도 이상이 정상으로 회복된 예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Torsades de Pointes is a form of polymorphic ventricular tachycardia that is associated with prolongation of QT intervals, characterized by QRS complexes of progressively changing ampulitude and cyclic length, giving the appearance of oscillations around the baseline. A 77 years-old woman was presented with hypotention and arrhythmia. Twenty four-hour ECG showed typical episodes of torsades de pointes with QT prolongation. This arrhythmia was controlled by isoproterenol and magnesium infusion, but it was not disappeared. She was diagnosed as Sheehan's syndrome by past history, anterior pituitary stimulation test and empty sella on CT scan. After hormone replacement treatment, Prolonged QT interval was normalized and polymorphic ventricular tachycardia has not recurred. We report a case of torsades de pointes associated with Sheehan's syndrome
김용철,김남호,김승환,최준호,박은미,이상재,이은미,유남진,윤경호,오석규,정진원 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.2
석청에 포함된 grayanotoxin에 의해 독성 작용이 나올 수 있으며, 이러한 독성 작용은 일반적으로 24시간 이내 저절로 회복된다. 최근에 본 저자들은 석청 복용 후 발생한 심실빈맥을 경험하였기에 보고하는 바이다. 49세 남자가 호흡곤란으로 내원하였으며, 내원당시 분당 40회 정도의 동성 서맥이 관찰되었고, 수액을 투여하던 중 심실 빈맥이 발생하였다. 항부정맥제를 투여 후 정상 동율동으로 전환되었으며, 특별한 이상 없이 4일 후 퇴원하였다. Mad-honey intoxication caused by the consumption of honey producted from the nectar of rhododendrons. The grayanotoxins cause the intoxication. The toxic effects of mad-honey poisoning are rarely fatal and generally last for no more than 24 hours. We experienced one case, a 49 years-old man who presented with dyspnea after ingestion of mad-honey. He showed marked sinus bradycardia with < 40 beats per minute on admission. The cardiac rhythm was changed to ventricular tachycardia immediately. These features resolved completely in 24 hours with continuous infusion of amiodarone(600 mg per day) and fluids. We report the case of intoxication of mad-honey as a presentation of fatal cardiac arrhythmia.
Airborne Nicotine Concentrations in the Workplaces of Tobacco Farmers
Yoo, Seok-Ju,Park, Sung-Jun,Kim, Byoung-Seok,Lee, Kwan,Lim, Hyun-Sul,Kim, Jik-Su,Kim, In-Shik The Korean Society for Preventive Medicine 2014 Journal of Preventive Medicine and Public Health Vol.47 No.3
Objectives: Nicotine is a natural alkaloid and insecticide in tobacco leaves. Green tobacco sickness (GTS) is known as a disease of acute nicotine intoxication among tobacco farmers. Until now, GTS has been recognized globally as a disease that results from nicotine absorption through the skin. However, we assumed that GTS might also result from nicotine inhalation as well as absorption. We aimed to measure the airborne nicotine concentrations in various work environments of Korean tobacco farmers. Methods: We measured the nicotine concentrations in the tobacco fields, private curing barns, and joint curing barns of farmers from July to October 2010. All sampling and analyses of airborne nicotine were conducted according to the National Institute for Occupational Safety and Health manual of analytic methods. Results: The airborne nicotine concentrations (geometric mean [geometric standard deviation]) in the tobacco field were $83.4mg/m^3$ (1.2) in the upper region and $93.3mg/m^3$(1.2) in the lower region. In addition, the nicotine concentration by personal sampling was $150.1mg/m^3$. Similarly, the nicotine concentrations in the private curing barn, workers in curing barns, the front yard of the curing barn, and in the joint curing barn were $323.7mg/m^3$(2.0), $121.0mg/m^3$(1.5), $73.7mg/m^3$(1.7), and $610.3mg/m^3$(1.0), respectively. Conclusions: The nicotine concentration in the workplaces of tobacco farmers was very high. Future studies should measure the environmental concentration of nicotine that is inhaled by tobacco farmers.
Yoo, Jun Sang,Chang, Seok-Woo,Oh, So Ram,Perinpanayagam, Hiran,Lim, Sang-Min,Yoo, Yeon-Jee,Oh, Yeo-Rok,Woo, Sang-Bin,Han, Seung-Hyun,Zhu, Qiang,Kum, Kee-Yeon Nature Publishing Group 2014 International journal of oral science. Vol.6 No.4
<P>The time domain entombment of bacteria by intratubular mineralization following orthograde canal obturation with mineral trioxide aggregate (MTA) was studied by scanning electron microscopy (SEM). Single-rooted human premolars (<I>n</I>=60) were instrumented to an apical size #50/0.06 using ProFile and treated as follows: Group 1 (<I>n</I>=10) was filled with phosphate buffered saline (PBS); Group 2 (<I>n</I>=10) was incubated with <I>Enterococcus faecalis</I> for 3 weeks, and then filled with PBS; Group 3 (<I>n</I>=20) was obturated orthograde with a paste of OrthoMTA (BioMTA, Seoul, Korea) and PBS; and Group 4 (<I>n</I>=20) was incubated with <I>E. faecalis</I> for 3 weeks and then obturated with OrthoMTA–PBS paste. Following their treatments, the coronal openings were sealed with PBS-soaked cotton and intermediate restorative material (IRM), and the roots were then stored in PBS for 1, 2, 4, 8 or 16 weeks. After each incubation period, the roots were split and their dentin/MTA interfaces examined in both longitudinal and horizontal directions by SEM. There appeared to be an increase in intratubular mineralization over time in the OrthoMTA-filled roots (Groups 3 and 4). Furthermore, there was a gradual entombment of bacteria within the dentinal tubules in the <I>E. faecalis</I> inoculated MTA-filled roots (Group 4). Therefore, the orthograde obturation of root canals with OrthoMTA mixed with PBS may create a favorable environment for bacterial entombment by intratubular mineralization.</P>