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조기진통의 예측지표로서 자궁경부 및 질내 태아파이브로넥틴의 임상적 유용성
정인광(IK Jung),나윤택(YT Rha),김용욱(YW Kim),변태섭(TS Byun),이종승(JS Lee),김사진(SJ Kim),이종건(CK Lee),나종구(JG Na),김수평(SP Kim) 대한산부인과학회 1996 Obstetrics & Gynecology Science Vol.39 No.10
Prematurity is the major cause of neonatal mortaliy and morbidity. The prediction and early arrest of preterm uterine contractions is the mainstay of the management of the preterm labor. Several biophysical methods and biochemical markers are available, but not satisfactory for the prediction of preterm labor. The aim of this study is to determine the clinical efficacy of fetal fibronectin as a biochemical predictor of preterm labor. Fetal fibronectin was obtained at external os and posterior vaginal fornix in 118 women who have irregular uterine contractions with intact membranes and, in 113 women who complained of watery vaginal discharges without visible leakage. The cervicovaginal fetal fibronectin was measured quantitatively by fetal fibranectin immunoassay in 118 patients and qualitatively by fetal fibronectin membrane immunoassay in 113 patients. The results were considered positive when specimens had a fetal fibronectin concentration above 50 ng/ml in women who have irregular uterine contractions with intact membranes. The results obtained were as follows; 1. Fetal fibronectin concentrations in women with or without irregular uterine contractions with cervix dilatation(<=2cm) and intact membranes were 229.18+-68 ng/ml, 16.8+-9.2 ng/ml, respectively. 2. In the efficacy of fetal fibronectin for the prediction of preterm labor in women who have irregular uterine contractions and intact membrane, the sensitivity, specificity, positive predictive value and negative predictive value are 83.3%, 85.2%, 65.8% and 93.8%, respectively. There were significant correlation between the positivity of the fetal fibronectin and interval(diagnosis to delivery), gestational weeks at delivery and neonatal body weight. 3. In the efficacy of fetal fibronectin for the prediction of preterm labor in women who complained of watery vaginal discharges without visible leakage, the sensitivity, specificity, positive predictive value and negative predictive value are 62.5%, 93.3%, 71.4% and 90.2%, respectively. There were significant correlation between the positivity of the fetal fibronectin and interval(diagnosis to delivery), gestational weeks at delivery and neonatal body weight. 4. in the association between fetal fibronectin membrane immunoassay and nitrazine test in women who complained of watery vaginal discharges without visible leakage, the accuracy was 83.2%. This results reflect that positive cerviovaginal fetal fibronectin in women who have irregular uterine contractions or in women who complained of watery vaginal discharges maybe a useful biochemical predictor for the prediction of preterm labor.
정인순 ( In Soon Jung ),윤숙정 ( Sook Jung Yun ),이지범 ( Jee-bum Lee ),김성진 ( Seong-jin Kim ),이승철 ( Seung-chul Lee ),원영호 ( Young Ho Won ) 대한피부과학회 2018 대한피부과학회지 Vol.56 No.10
Background: Acute generalized exanthematous pustulosis (AGEP) is typically a medication-induced acute febrile eruption. Few large-scale studies have reported clinical data regarding AGEP in Korea. Objective: This study analyzed the clinical and histopathological features of AGEP in Koreans to identify recent trends in this context. Methods: This study retrospectively reviewed 31 patients with AGEP. Age, sex, clinical features, etiologies, laboratory findings, histopathological features, and treatment outcomes were obtained from patients’ medical records and photographs. Results: The mean age of onset was 43.6 years, and the male:female ratio was 2.1:1. All patients showed non-follicular tiny pustules and erythema. Fever was reported in 13 patients and neutrophilia in 17 patients. Medications were considered the most common etiological contributors. Twenty patients showed drug-induced AGEP, and 11 of 20 patients showed antibiotic-induced AGEP. Serum C-reactive protein and lactate dehydrogenase levels increased in 93.8% and 77.8% of the patients, respectively. Histopathologically, all patients showed subcorneal or intraepidermal pustules, followed by exocytosis and neutrophilic dermal infiltrate. Twenty-five patients improved within a mean period of 7.5 days after the onset of the skin rash. The percentage of women in the drug-induced AGEP group was significantly higher than that in the non-drug-induced AGEP group. Conclusion: This report describes a large-scale study that analyzed the clinical and histopathological features of AGEP in Koreans and seems to accurately reflect the recent trends in this context. Clinically, it is important to note that the percentage of women in the drug-induced AGEP group was higher than that in groups showing other etiologies of AGEP. (Korean J Dermatol 2018;56(10):594∼602)
정인화(I.W.Jeong),임근희(G.H.Rim),김종수(J.S.Kim),이현정(H.J.Lee),이홍식(H.S.Lee) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
본 논문에서는 최근 개발된 250W 고압나트륨 램프용 전자식 안정기의 구성과 동작특성을 다양한 실험을 통해 기존 자기식 안정기와 비교하였다. 이를 통해 전자식 안정기의 향상된 광효율 특성과 개선된 역률. THD 등과 같은 전기적 특성을 확인할 수 있었다.
정인성(Jung In-Sung),이주(Lee Ju),정락교(Jung Rak-Gyo),이종우(Lee Jong-Woo) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
The LIM can be used as a transport system with wheel structure. The structural tolerance cause the airgap unbalance and that effects on the LIM performance. The effect of airgap unbalance on the motor performance such as thrust force, velocity and armature current are investigated by using Finite Element Analysis (FEA). From this numerical works, it is known that the airgap unbalance almost does not effect on the motor performance and LIM for transport system is robust to the structural tolerance.