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아두 분만시 빠른 호흡을 통한 새로운 분만방법이 산도열상에 미치는 영향
최영삼(Young Sam Choi),송태복(Tae Bok Song),김윤하(Yoon Ha Kim),이경민(Kyung Min Lee),김혜정(Hye Jung Kim),나재호(Jae Ho Na),변지수(Ji Soo Byun) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.3
N/A Objective: This study was conducted to evaluate the effect of new delivery method of fetal head on the vaginal and perineal laceration at vaginal delivery. Methods: In this prospective clinical trial of 291 parturients with singleton pregnancy at or more than 37 weeks' gestation, pregnant women were radomely assigned to classical delivery method (control group)or new delivery method (study group)of the fetal head from September 1999 to August 2000 at Chonnam National University Hospital. The frequency and degree of vaginal and perineal lacerations at vaginal delivery Results: Perineal lacerations of the 3rd or 4th degree was developed in 20 women (13.8%) among 145cases of control group and 6 women (4.1%) among 146 cases of study group (p<0.01).Vaginal wall laceration was developed in 55 women (37.9%)of the control group and 37 women (25.3%)of the study group (P <0.01). The incidence of the laceration of perineum and vaginal wall was significantly lower in the study group than Conclusion: The new delivery method of fetal head was effective for reducing the laceration of perineum and vaginal wall at full-term vaginal delivery.
컴퓨터 단층 촬영으로 진단된 미세 폐 전이가 임신성 융모종양의 예후에 미치는 영향
김석모(Seok Mo Kim),김기민(Ki Min Kim),최영삼(Young Sam Choi),김윤하(Yoon Ha Kim),최호선(Ho Sun Choi),변지수(Ji Soo Byun) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.11
목적: 임신성 융모종양 환자의 병기설정에서 컴퓨터 단층 촬영에 의한 미세 폐 전이의 진단이 치료결과에 미치는 영향을 알아보고자 본 연구를 계획하였다. 연구방법: 1989년부터 1998년까지 전남대학교 의과대학 산부인과학 교실에서 비전이성 임신성 융모종양으로 진단된 48명과 폐 전이성 임신성 융모종양으로 진단된 11명 등 총 59명을 대상으로 치료전 흉부 컴퓨터 단층 촬영을 시행하였다. 흉부 컴퓨터 단층 촬영에서 폐에 전이가 없는 경우를 진성 비전이성 임신성 융모종양군으로, 1cm미만의 미세한 폐전이가 발견된 경우를 미세 폐 전이성 임신성 융모종양군으로 구분하였다. 그리고 흉부 엑스선 검사에서 폐에 전이가 발견된 경우는 폐 전이성 임신성 융모종양군으로 구분하였다. 모든 환자에서 WHO 예후 점수를 기록하여 7점이하의 저 및 중증도 위험군은 1mg/kg Methotrexate를 1,3,5,7일 그리고 0.1mg/kg Folinic acid를 2,4,6,8일 각각 근주하는 화학요법을 시행하였고, 8점이상의 고위험군은 EMACO 복합 화학요법을 일차적으로 시행하였다. 모든 환자는 1년간 경구 피임약으로 피임을 하도록 하였으며 임신성 융모종양이 완해된후 한달 동안은 1주 간격으로, 그후는 한달 간격으로 1년간 혈청 hCG수치를 측정하여 재발 여부를 확인하였다. 결과: 총 59명 중 비전이성 임신성 융모종양군은 48명(81.4%)이었고 폐 전이성 임신성 융모종양군은 11명(18.6%)이었다. 비전이성 임신성 융모종양군 중 진성 비전이성 임신성 융모종양군은 33명(68.8%)이었고 미세 폐 전이성 임신성 융모종양군은 15명(31.2%)이었다. 진성 비전이성 임신성 융모종양군과 미세 폐 전이성 임신성 융모종양군은 나이, 완해 될 때까지의 기간 및 화학요법 사용횟수, 일차 화학요법에 대한 실패율 등 예후 지표는 통계학적으로 의의 있는 차이가 없었으며 완해율도 두군 모두 100%로 같았다. 완해후 추적검사에서 1명이 미세 폐 전이성 임신성 융모종양군에서 재발하였으나 진성 비전이성 임신성 융모종양군에서는 한명도 재발하지 않았다. 결론: 임신성 융모종양에서 폐전이를 발견하는데 있어서 컴퓨터 단층 촬영은 흉부 엑스선에 비해 보다 더 민감한 방법임에는 틀림이 없다. 그러나, 컴퓨터 단층촬영에 의한 미세 폐 전이의 발견이 환자의 치료결과나 예후에 어떠한 의의있는 영향도 끼치지 못하므로 폐 전이의 발견을 위한 치료전 병기설정 검사는 흉부 엑스선으로 충분하다고 사료된다. Objective: CT scan is more accurate method than chest X-ray for detecting small pulmonary metastasis in GTT. About 40% of nonmetastatic GTT based on conventional chest X-ray have pulmonary metastasis detected by CT scan. However, prognostic significance of small pulmonary metastasis detected only by CT scan is not well determined. The purpose of our study is to know whether small pulmonary metastasis detected only by CT scan affect treatment outcome worse or not. Methods: Forty eight GTT patients without any metastasis and eleven GTT patients with lung metastasis as determined by conventional GTT staging studies were evaluated with CT scan of the lungs before treatment between 1989 and 1998. A total of fifty nine GTT patients were classified into true nonmetastatic and micrometastatic groups based on CT scan finding, and nonmetastatic and metastatic groups based on conventional chest X-ray finding. They all received methotrexate therapy except three patients with high risk WHO score. All their medical records were reviewed to detect any differences in the treatment outcome and prognostic factors according to the groups. Results: Fifteen of forty eight patients(31.2%) had pulmonary micrometastasis detected by CT scan. Three of thirty three patients(9.09%) in the true nonmetastatic group failed initial therapy with methotrexate while two of fifteen patients(13.3%) in the micrometastatic group failed initial therapy(p value: 0.642). Five of forty eight patients(10.41%) in the nonmetastatic group failed initial therapy while one of eleven patients(9.09%) in the metastatic group failed initial therapy(p value: 1.00). All patients who failed initial methotrexate therapy finally achieved remission with EMACO therapy regardless of their groups. There was no statistically significant difference in the other prognostic parameters among the groups. Conclusion: CT scan was a more sensitive imaging tool than chest X-ray for detecting pulmonarymetastasis in GTT. But lung micrometastasis detected by CT scan had no significant impact on the clinical outcome of patients with GTT, chest X-ray is adequate method for the detection of lung metastasis.
휠 얼라이먼트 값과 타이어 편마모 영향도 평가 및 분석
정수식(Chung Soo Sik),정원욱(Jung Won Wook),이상주(Lee Sang Ju),고범진(Koh Bum Jin),최영삼(Choi Young Sam) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The tire uneven wear has been an ongoing concern for a long time, and one of customer's complaints too. This paper deals with uneven wear improvement of passenger car tires, to have tested the tire wear levels by each wheel alignment set (according to changing toe and camber) using taxis. The pre-set wheel alignments on test vehicle were gained by energy friction simulation of tire. The result of this experiment was as follows : First, verified the effects of initial wheel alignment (adjusted at Curb Vehicle Weight) to minimize tire uneven wear. Second, tire uneven wear makes tire life much shorter than even wear does.
전산해석을 이용한 Telescopic Bridge의 구조안정성 평가 및 설계 보강
김한울(Han-Ul Kim),배징도(Jing-Do Bae),이재훈(Jae-Hoon Lee),최주형(Joo-Hyung Choi),최영삼(Young-Sam Choi),조용원(Yong-Won Cho) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11
In this research, design reinforcement and structural stability evaluation of a telescopic bridge are introduced which is used for transferring people and supplies safely between OSV and offshore plants. Analysis cases were selected considering classification rules(DNV-GL) and computational analyses were performed. According to the analysis result, researched proper design reinforcement by checking weak parts and tried to reinforce design effectively.