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하상진 ( Sang Jin Ha ),하종원 ( Jong Won Ha ) 대한내과학회 2014 대한내과학회지 Vol.87 No.4
Mitral regurgitation (MR) is defined as the reflux of blood from the left ventricle into the left atrium during systole, resulting from the loss of adequate closure of the mitral valve. Echocardiography has become the primary noninvasive imaging method for evaluating mitral valvular regurgitation, since it provides structural and hemodynamic information. The echocardiographic assessment of mitral regurgitation should quantify the regurgitation, assess the valve anatomy and function, and evaluate the consequences of mitral regurgitation on the cardiac chambers. In clinical practice, the management of patients with mitral regurgitation is based largely on the echocardiography results. This article describes the echocardiographic assessment of mitral regurgitation, emphasizing the usefulness of echocardiography in primary care. (Korean J Med 2014;87:424-428)
혈액 투석 환자에서 포도당 희석법과 초음파 희석법을 이용한 혈관 통로의 혈류 속도 비교
하상진 ( Sang Jin Ha ),이윤정 ( Yoon Jung Lee ),조병현 ( Byung Hyun Cho ),정경환 ( Kyung Hwan Jung ),문주영 ( Joo Yung Moon ),이상호 ( Sang Ho Lee ),이태원 ( Tae Won Lee ),임천규 ( Chun Gyoo Ihm ) 대한신장학회 2007 Kidney Research and Clinical Practice Vol.26 No.4
Purpose : Vascular access flow (Qa) measurements are important in the surveillance protocol of hemodialysis vascular access stenosis. The glucose pump technique (GPT) is a technique for Qa measurement based on the dilution technique of a constant glucose infusion that was introduced in 1995. The aim of this study is to verify the clinical efficacy of GPT in vascular access surveillance compared with ultrasound dilution technique. Methods : In 31 chronic hemodialysis patients with a AV fistula, we compared Qa measurements performed with GPT in pre-dialysis and the ultrasound dilution technique (Transonic HD01, Transonic System Inc., Ithaca, NY) during hemodialysis. Results : Mean Qa was 1171 ml/min by GPT versus 1028 ml/min by HD01 (p=0.262). There was a strong linear correlation between the two methods (r=0.61; p<0.01). Ultrasound dilution technique HD01 yielded 6 cases of high risk Qa measurements and GPT yielded 4 cases of high risk Qa measurements. The diagnostic accuracy of GPT tested with the ROC curve was similar with ultrasound dilution technique HD01. The specificity and sensitivity was 80% and 66.7% according to Qa=600ml/min. But sensitivity was 83.3% according to Qa=750 ml/min. Conclusion : GPT offers the advantage of a simple and economic bedside procedure easily performed before dialysis and had a similar diagnostic accuracy and efficiency compared with ultrasound dilution technique HD01.
Klebsiella pneumoniae에 의한 심낭 압전으로 진행된 급성 화농성 간농양 1예
최은용 ( Eun Yong Choi ),하상진 ( Sang Jin Ha ),이정훈 ( Jung Hoon Lee ),장원석 ( Won Seok Jang ),김진배 ( Jin Bae Kim ),김원 ( Weon Kim ),김우식 ( Woo Shik Kim ) 대한내과학회 2013 대한내과학회지 Vol.84 No.6
An 83-year-old female patient visited the emergency department for abdominal pain and dyspnea with hemodynamic instability. Abdominal computed tomography showed multiple liver abscesses and a large volume of pericardial effusion. A transthoracic echocardiography revealed features suggestive of cardiac tamponade, including massive pericardial effusion and diastolic collapse of the right atrial wall. Emergency percutaneous pericardial drainage and percutaneous transhepatic drainage were performed. Klebsiella pneumoniae (KP) was isolated from both the pericardial effusion and bile. The first case of cardiac tamponade secondary to a liver abscess in Korea was reported in 1981, and it was caused by amoebal infection via fistula formation between the pericardium and abscess. We recently experienced a case of pyogenic liver abscess caused by KP complicating cardiac tamponade via direct invasion. This is an unusual complication of KP infection because KP is more frequently associated with hematogenous spread. (Korean J Med 2013;84:842-846)
장인현(Chang In-Hyun),하상진(Ha Sang-Jin) 한국체육과학회 2002 한국체육과학회지 Vol.11 No.1
The purpose of this study is to analyze the maximal physical fitness and exercise intensity in tennis competitions, according to heart rate and blood lactate on male and female university student players. Subjects for this study were eight male and female tennis players who were attending D university in Kyungbuk Province. Cardiopulmonary function was measured by a maximum exercise test. The test was given by KSSI protocol at the treadmill. During the exercise, we measured heart rate, oxygen intake, blood lactate, and duration time. The games were performed in singles game. Exercise intensity of the games was calculated by %HRmax and %LT in each set of singles competitions. Mean values and standard deviations were calculated. A t-test was used for comparing data between male and female group. The significance level was-set at p<.05. The results are as follows. Maximum oxygen intake was higher in male(56.73㎖/㎏ㆍmin), than female(45.45㎖/㎏ㆍmin), and there were significant differences (p<.05) between male and female. Duration time in male(930.00sec) was longer than female(802.50sec), and there were significant differences(p<.01) between male and female. Exercise intensity of HRmax in female(74.89%HRmax) was higher than male(72.90%HRmax), but it was not significant. Exercise intensity of LT in male(117.21%LT) was higher than female(101.96%LT), but it was not significant.
팽창점토를 사용한 경량콘크리트의 특성에 관한 실험적 연구
김종인(Kim Jong-In),최영화(Choi Young-Wha),하상진(Ha Sang-Jin) 한국산업융합학회 2002 한국산업융합학회 논문집 Vol.5 No.3
The purpose of this study is to find the mechanical properties of lightweight concrete using expanded clay. Thus, slump, air content, compressive strength, elastic modulus, tensile strength, length change ratio, unit weight change ratio and absorption of lightweight concrete have been investigated. The conclusions of this study are as follows;<br/> 1. The loss of slump and air content of concrete increased as the expanded clay content increased and the size of coarse aggregate decreased.<br/> 2. The compressive strength of concrete using 100% expanded clay of 13, 19㎜ size at 28 days were respectively 282, 2521㎏f/㎠.<br/> 3. The clastic modulus and tensile strength of concrete decreased with increase of expanded clay content.<br/> 4. The length change ratio of concrete increased with the larger coarse aggregate size, and decreased with the increase of expanded clay content. <br/> 5. The unit weight of concrete decreased with the increase of expanded clay content, and the ratio of that was larger at the early age.<br/> <br/>
혈액투석 중 저혈압 환자에서 저온 투석액 사용과 나트륨 조절 투석이 혈역학에 미치는 영향
이영재 ( Young Jae Lee ),한재준 ( Jae Joon Han ),하상진 ( Sang Jin Ha ),박미나 ( Mi Na Park ),문주영 ( Ju Young Moon ),정경환 ( Kyung Hwan Jeong ),이상호 ( Sang Ho Lee ),이태원 ( Tae Won Lee ),임천규 ( Chun Gyoo Ihm ) 대한신장학회 2007 Kidney Research and Clinical Practice Vol.26 No.5
Purpose : There are methods to prevent intradialytic hypotension such as cool dialysate and sodium profiling but hemodynamic effects of these methods are not proved yet. We studied hemodynamic effects of cool dialysate and sodium profiling through brachial pulse monitoring which is simple and not invasive. Methods : Ten patients selected by single, blind, randomized study are enforced control phase, cool dialysate phase, and sodium profiling phase and checked brachial pulse for 10 minutes after dialysis and 10 minutes before finishing. Hemodynamics is checked by DynaPulse 5200A (Pulse metric, Inc. San Diego, CA, USA). Results : In control, central artery systolic blood pressure is decreased after dialysis. Brachial and central artery compliance is increased but brachial artery resistance is decreased. The central artery systolic pressure, brachial mean artery pressure, and brachial artery resistance is increased, but compliance is decreased in cool dialysate as compared with control dialysis. The comparison of intradialytic changes of hemodynamic parameters between control dialysis and sodium profiling shows that intradialytic changes of hemodynamic parameters are similar, but pre-hemodialytic weight is increased in sodium profiling. Number of episodes of symptomatic hypotension per dialysis treatment in cool dialysate and sodium profiling is decreased more than in control dialysis. Conclusion : Our study suggests changes of compliance and resistance are most important in hemodynamic parameters of intradialytic hypotension, especially changes of compliance and resistance of vessel in cool dialysate are useful in preventing intradialytic hypotension.