• Journal of the Institute of Electronics Engineers of Korea SC
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• v.44 no.1
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• pp.94-99
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• 2007

Many cases of acute cardiac shock and cardiac arrest in emergency room and ICU have been increasing. In this case, ECMO with centrifugal pump has been used generally. However, due to the heavy weight and big size, the system is not adequate for emergency cases. And other defects of this system are that membrane oxygenator's pressure is high and blood are exposed to the air. There was some tries of ECMO using pulsatile pump, but it was found that the weak point of these system is high peak pressure and hemolysis. The mechanism of twin pulsatile pump is that Membrane oxygenator Outlet Pump(MOP) make negative pressure when Membrane oxygenator Inlet Pump(MIP) provides high positive pressure, and the negative pressure will decrease positive pressure of Membrane Oxygenator. Our group analyzed this advantage through In-Vitro and 12 Cases In-Vivo test.

• Journal of Biomedical Engineering Research
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• v.23 no.4
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• pp.323-327
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• 2002

Chronic diabetic patients need to sample capillary blood for monitoring and controlling the blood sugar level. Frequent sampling requires to minimize pain during skin puncture. The present study developed mechanisms to minimize pain with effective sampling procedure. which consisted of tapered spring, guiding tunnel, and 30G needle Penetration depth was limited to within 2mm for pain reduction as well as for safety. Simple no-reuse mechanism also prevented the cross-patient and secondary infection possibility. Clinical experiments demonstrated the best convenience and safety with minimal pain in the diabetes, normal, and nursing students groups. Sing1e blood sampling was enough for successful blood sugar test by portable analyzer. The present sing1e use auto-lancet should be of great convenience in frequent capillary blood sampling for the diabetes.

• The Journal of the Korea Contents Association
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• v.17 no.8
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• pp.631-643
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• 2017

The purpose of this study is to examine factors affecting the life satisfaction of patients with hemodialysis in order to improve the quality of life for patients with hemodialysis. The subjects of this study are 168 patients who have undergone hemodialysis treatment in the hemodialysis rooms in D-city and C-providence. The data are collected between August 20th to September 5th, 2015. By using SAS 9.3 statistics program for data analysis, frequency, ${\chi}^2$-test, variance analysis and multiple regression analysis are conducted. Based on the analysis, it is found that family support(t=5.33, p<.001) and self-efficacy(t=3.52, p<.001) are statistically significant to the quality of life for male patients. Family support(t=2.58, p<.012) and adherence to self-care(t=4.08, p<.001) are statistically significant to the quality of life for female patients. With the study results, it suggests that nurses can help improve the affective and psychological stability of patients with hemodialysis by recognizing the factors affecting the life satisfaction of patients with hemodialysis by gender, developing and utilizing a nursing intervention.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 1995.10b
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• pp.387-392
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• 1995

전기 유압식 좌심실 보조장치에서 모터 전류 파형을 정보로 하여 작동기의 이완기 속도를 조절함으로써 좌심방으로부터 유입되는 혈류량을 조절하는 알고리즘을 개발하였다. 좌심실 보조장치(Left Ventricular Assist Device, LVAD)는 허혈성 심장질환 등으로 좌심실 의 혈액 박출 기능이 저하된 환자에게 시술하여 정상 상태의 심박출량을 유지할 수 있도록 하는 보조 혈액 박출 기능이이다. 전기 유압식 좌심실 보조장치에서는 혈액의 유입이 능동 적으로 이루어지므로, 좌심방 함몰로 인한 심근 손상 및 외부 공기 유입으로 인한 색전증을 방지하기 위해 유입혈류량을 현재 좌심방내의 상태에 따라 적절히 조절해 주어야 한다. 좌 심방 내의 혈액량 정도는 혈액을 유입해 내는 작동기의 이완기 동작 시에 소모되는 에너지 크기에 반영되고, 작동기를 구동하는 모터에 들어가는 전류의 크기는 작동기에 공급되는 에 너지에 비례하므로, 이전류 파형의 정보들을 통해 좌심방내의 상태를 추정해 볼 수 있다. 본 논문에서는 퍼지로직을 적용하여 모터 전류 파형의 정보들을 통해 좌심방 내의 상태를 추정 해 볼 수 있다. 본 논문에서는 퍼지로직을 적용하여 모터 전류 파형의 이상 유무를 판단한 뒤 에에 따라 작동기의 이완기 속도를 조절하는 알고리즘을 개발하여 모의순환장치 실험을 통해 그 실효성을 검증한 결과를 정리하였다.

• The Monthly Diabetes
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• s.151
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• pp.50-51
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• 2002

당뇨병성 막망증은 지속적인 고혈당과 이에 따른 대사이상으로 망막의 미세혈관이 점차 변형, 폐쇄되어 망막으로의 원활한 혈액공급이 되지 못하고 혈관투과성이 증가하여 망막에서 신생혈관이 생성되는 질환이다. 진행된 후에 치료를 통한 시력호전이 불가능하므로 조기진단 및 적절한 관리가 중요하나, 치료가 가능한 초기질환 외에 당뇨병성 망막증이 상당히 진행된 경우에도 주관적 증상이 없는 경우가 많다. 따라서 시력장애 등의 증상이 나타난 후에는 이러한 예방적인 조치를 취할 수 있는 시기를 지나치는 수가 많다.

• The Korean Journal of Medicine
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• v.93 no.6
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• pp.532-537
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• 2018

• Proceedings of the Korean Society of Applied Pharmacology
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• 1994.04a
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• pp.296-296
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• 1994

수술시 근육 이완제로 사용되고 있는 metocurine iodide는 항생물질 투여환자, 중증 근무력중, 전해질 평형실조, 중증 신질환이 있는 환자 등에서는 작용이 증가되어서 상용량에서도 약화사고의 우려가 있어 규제가 필요한 약물이다. Metocurine iodide를 생체 시료중에서 분석하기 위해 rosebengal과 착제를 형성시켜 유기용매로 이온쌍 추출을 한 후, HPLC를 이용하여 rose bengal율 분석함으로써 metocurine iodide를 간접 정량하는 방법을 확립하였다. 이 방법은 뇨와 혈액증에 함유된 metocurine iodide를 0.09 - 9.10$\mu\textrm{g}$/m1농도에서 분석할 수 있었으며, 상관계수는 0.994 - 0.999로 양호한 직선성을 나타내었고, 동시 처방 약물의 영향은 거의 없었다. 뇨 및 혈액중 metocurine iodide의 검출 한계는 각각 0.8ng. 1.2ng (S =3)이었다.

• The Monthly Diabetes
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• s.214
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• pp.15-18
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• 2007

당뇨병은 혈액 속에 포도당이 높아져 이에 따른 각종 합병증 때문에 심각한 후유증을 초래할 수 있는 질환이다. 이 중에서 신장 합병증은 중요한 당뇨병 합병증 가운데 하나이다. 당뇨병성 신증은 거의 모든 당뇨병환자에게서 나타난다. 당뇨병성 신증의 마지막은 신장 기능이 거의 다 망가져 혈액투석이나 복막투석을 받는 말기신부전 환자의 가장 흔한 원인이 바로 당뇨병이므로 당뇨병의 신장 합병증을 줄이는 것이 환자의 삶의 질과 직결되는 문제라 할 수 있다. 신장합병증은 초기에는 증상이 잘 나타나지 않아 항상 주의가 필요하다. 신장이 손상되기 시작하면 단백뇨가 계속 나오고 혈압이 오르며 빈혈이 발생하고 몸이 붓는다. 이런 현상은 포도당의 대사물질이 사구체에 쌓이기 때문이다. '사구체'란 신장 안에서 오줌을 거르는 일을 하는 모세혈관 조직으로 일단 손상되면 회복되지 않고 진행되며 이 상태를 그대로두면 결국 더 이상 신장에서 혈액의 노폐물을 걸러내지 못하는 만성 신부전증으로 진행하게 되는 것이다.

• The Journal of the Korea Contents Association
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• v.15 no.8
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• pp.389-396
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• 2015

The liver fibrosis is a disease we often see in clinical medicine, and the persistence and repeatition of inflammation and necrosis of liver cells continue for several years, and it is proceeded to cirrhosis. So decrease of death rate and prevalence rate by complications of cirrhosis and hepatocellular carcinoma is main task of clinical medicine by protection of chronic liver ailment patients from proceeding to cirrhosis and hepatocellular carcinoma. So this study tried to represent the ultrasonic image, blood test, the relationship with liver stiffness of diffuse liver ailment patients as numbers. This study was performed with patients from whom the image was taken by ultrasonic and 141 people who were treated by fibroscan, the basic data for blood test was obtained from the test results at the time when ultrasonic image and liver fibroscan was performed. The statistical analysis was performed by One-way analysis of variance(ANOVA) to verify difference between groups. The value of liver stiffness was increased in the order of normal, chronic liver disease and cirrhosis. As a results, ALT and Albumin have no statistical difference between object groups, and there are statistical differences in the results of ultrasonic decoding at age, AST, ALP, Bilirubin, PLT, PT, and kPa, and they are statistically meaningful(p<0.005). And the value of liver stiffness of chronic liver ailment was presented only as over 12.5kPa in other study, but it was represented as numbers for quantitative diagnosis by presenting average kPa threshold value according to disease in this study. And by presenting relationship of diagnosed results, it is considered that it could be used as first tool to diagnose chronic liver ailment patients according to their disease.

• Journal of the Korean Society of Radiology
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• v.13 no.7
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• pp.1005-1014
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• 2019

The purpose of this study is to evaluate the usefulness of coronary computed tomography angiography of coronary artery disease for the purpose fo health screening according to gender and age. In addition the association between hematological factors (Glucose, total cholesterol, visceral fat, body mass index, triglycerides, high density lipoprotein (HDL), low density lipoprotein (LDL)) and coronary artery disease is investigated. A retrospective analysis of coronary computed tomography angiography with 299 subjects showed that the detection rate of coronary artery disease was higher in men over 50 years of age and it was statistically significant. In particular, the prevalence rate of men (37.9%) was about 2 times higher than that of women (17.0%). Glucose and HDL as hematological factors associated with coronary artery disease were statistically significant. The prevention and management of coronary artery disease seems to require the control of glucose and high density lipoprotein (HDL). Although it is not statistically significant with other hematological factors, the need for management of coronary artery disease was identified. the coronary computed tomography angiography of coronary artery has higher radiation doses than other CT scans. Therefore, for the purpose of screening, coronary computed tomography angiography should be considered in consideration of the sex and age of the examinee, and detection of coronary artery disease through other non-invasive tests should be prioritized over coronary computed tomography angiography.