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송현석(H. S. Song),문성원(M. S. Mun),김점식(J. S. Kim),박용범(Y. B. Park),권신원(S. W. Kwon),신동휘(D. H. Shin),박동환(D. H. Park),강문호(M. H. Kang) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.5
기존의 인력굴착을 통한 지선근가 매설시공 방법을 오거크레인에 의한 기계화시공을 하기 위하여 오거크레인 굴착공에 적합한 수직시공을 원형 지선근가를 개발을 하고 개발된 원형근가를 오거크레인을 이용한 기계화시공에 적용함으로써 공사시간 및 비용 절감과 시공품질의 향상을 이루려 한다.
제 2 형 당뇨병에서 미세혈관 합병증과 대혈관 합병증의 대비
강문호,이기영,정연실,김홍규,서찬종,송광식,박혜영,이원기 대한당뇨병학회 2001 Diabetes and Metabolism Journal Vol.25 No.2
Background: Type 2 diabetes is a heterogeneous disease. As to its complications, microangiopathy predominantly develop in some patients while macroangiopathy is more predominant in others. Therefore, this study was performed to identify the factors associated with such dissociation. Methods: Type 2 diabetic patients were classified into the macro and microangiopathy groups by carotid intima-medial thickness (IMT) and the presence of severe diabetic retinopathy. Patients with IMT ≤ 0.83 mm and severe NPDR or PDR were assigned to microangiopathy group; those with IMT 0.84 mm and no diabetic retinopathy were assigned to macroangiopathy group. Of 95 patients studied, 14 were classified as microangiopathy group and 20 as macroangiopathy group. Results: When the microangiopathy and macroangiopathy groups were compared, the microangiopathy group were significantly younger at the time of examination and at the onset of diabetes, and had longer duration of diabetes. Percentage of patients receiving insulin treatment was significantly higher and plasma C-peptide significantly lower in the microangiopathy group. However, HDL-cholesterol levels were significantly lower in the macroangiopathy group. Furthermore, the multiple logistic regression analyses revealed that younger onset of type 2 diabetes was an independent factor that was associated with the acceleration of microangiopathy. Conclusion: This study suggests that the age at onset of diabetes is an important independent risk factor that is associated with predominant development of microangiopathy in type 2 diabetic patients.
인슐린비의존형 당뇨병 환자에서 말초신경병증과 저인슐린혈증
정연실,이기영,이성광,김홍규,박혜영,강문호 대한당뇨병학회 2000 Diabetes and Metabolism Journal Vol.24 No.2
Background: There is little information on the risk factors for diabetic polyneuropathy other than glycemic control and duration of diabetes. The relation between diabetic polyneuropathy and hypoinsulinemia is controversial. This study is to determine whether hypoinsulinemia is an additional factor influencing the development of polyneuropathy in patients with type 2 diabetes. Methods: We performed an oral glucose tolerance test with C-peptide measurement in 192 patients with type 2 diabetes. Peripheral polyneuropathy was diagnosed when the patients had both typical symptoms of polyneuropathy and abnormal physical findings or NCV. We analysed the relation between metabolic variables including fasting and postprandial C-peptide levels and diabetic polyneuropathy. Results: In addition to retinopathy and nephropathy, duration of diabetes, low C-peptide level (fasting and postprandial), insulin use, and high HDL-cholesterol level were associated with diabetic polyneuropathy. Multivariate logistic regression model revealed that an independent association of diabetes duration and postprandial 2-hour C-peptide concentration with polyneuropathy. When we stratified the patients into the two groups according to the median duration of diabetes (8 years), the association of low postprandial C-peptide concentration with polyneuropathy was significant only in the shorter duration group ($lt; 8 years). However, significant association of HbA_(ic) level was shown in the longer duration group. Conclusion: Decreased insulin secretory function of the pancreas as well as increased duration of diabetes was independently associated with diabetic polyneuropathy in patients with type 2 diabetes. Hypoinsulinemia might be an additional risk factor for the development of diabetic polyneuropathy in type 2 diabetic patients, particularly with short duration. To confirm these relationship further longitudinal study in a large cohort is necessary.