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허택(T Hur),양남훈(NH Yang),김동석(DS Kim),이명아(MA Lee),조성진(SJ Cho) 대한산부인과학회 1998 Obstetrics & Gynecology Science Vol.41 No.9
Actinomycosis is a slowly progressive infection due to an anaerobic gram-positive bacterium. Actinomycotic infection of the female genital tract are rare. The presence of a long-standing intrauterine contraceptive device (IUD) is a well-known risk factor in young women. The diagnosis is frequently missed preoperatively. Actinomyces infection should be born in mind in the differential diagnosis of a young female with an IUD, fever, and abdominal mass. All patients with IUDs should undergo annual cytologic smears. We have experenced a case of pelvic actinomycosis associated with IUD and report this case with a brief review of literatures.
열처리가 Elgiloy 선재의 기계적 성질에 미치는 영향
이병태,허택,최석규,김형일 대한치과교정학회 1992 대한치과교정학회지 Vol.22 No.3
Heat treatment which removes internal stress enhances the mechanical properties of the orthodontic arch wire. The main purpose of this experiment was to investigate the effects of the heat treatment on the mechanical properties of the Elgiloy wire. The Elgiloy wire, 0.016"X0.022" and 0.018"X0.025", were heat treated in an electric oven for 5, 10 and 15 minutes at selected temperatures between 300 and 900℃. Tensile strength and load deflection rate were measured to reveal the changes of mechanical property at various conditions, and each specimen was observed under metallurgic microscope. Also to trace the precipitation material due to overheat treatment, a qualitative analysis was carried out with EDS system. It was found that heat treatment at a low temperature caused an increase in the tensile strength and bending resistance, and a maintenance in the fibrous in the tensile strength and bending resistance, and a maintenance in the fibrous structure of both sizes of wire. The changes observed in properties and appearance were probably due to the relief of internal stresses incurred in the metal during cold working. In both sizes of wire the tensile strength and the bending resistance continued to decrease at high temperature, and the fibrous structure continued to disappear then was not observed at 900℃. The carbide precipitation founded in grain boundary at 750℃ probably was other elements carbide (Ni, Ca) except Cr. The grain growth was observed at 1100℃. Optimum heat treatment for the 0.016"X0.022" Elgiloy wire was 10 minutes at 500℃, and for the 0.018"X0.025: Elgiloy wire it was 5 to 15 minutes at 500℃.
조성진,허택,김기선,이홍연 대한산부인과학회 1996 Obstetrics & Gynecology Science Vol.39 No.11
From March, 1986 to August, 1995, 67 patients who underwent a microsurgical reversal of the fallopian tubes which were followed-up for more than 6 months in the Department of Obstetrics and Gynecology, National medical Center were reviewed in order to determine the pregnancy rate and to evaluate the influencing factors. The results were as follows: 1. The mean age of the patients was 31.7 years and the mean age at sterilization and reversal was 5.74 years, the mean living children at tubal reversal was 1.3. 2. The reasons for requesting tubal reversal were desire for more children(42.2%), death of children(37.7%), and change in marital state(20.0%). 3. The kinds of previous tubal sterilization was performed, were laparoscoic cautery (53%), laparoscopic ring(28.9%), pomeroy method(15.6%), and minilap(2.2%). 4. The most common site of the anastomosis was isthmic-ampular portion(62.2%), the site of the highest pregnancy rate was cornual-isthmic portion(100%). 5. The postoperative tubal length was 6.6cm the average interval between tubal reversal and pregnancy was 3.9 months. 6. No statistical difference were found in pregnancy rate according to the method of previous sterilization. 7. The pregnancy rate according to the tubal length 3 or less, 3~4.9, 5~6.9, 7~8.9, 9 or more were 0%, 42.8%, 76.4%, 78.6%, 100% respectively. 8. The overall pregnancy rate after tubal reversal was 71.1%, and the outcome of the pregnancy was as follows; term pregnancy 62.3%, preterm-delivery 2.2%, spontaneous abortion 4.4%, ectopic pregnancy 2.2%.
유산술중 발생한 자궁내 잔류 라미나리아 조각의 자궁경을 이용한 제거 3 예
조성진,송준,허택,임주형,양남훈,오영미,이재수,신재국 대한산부인과학회 1998 Obstetrics & Gynecology Science Vol.41 No.7
저자들은 유산술 시행중 간혹 발생할 수 있는 자궁강내 잔류 라미나리아 조각의 자궁경을 이용한 제거 3예를 경험하였기에 간단한 문헌 고찰과 함께 보고하는 바이다. Laminaria tents have been used for the purpose of gradual cerivcal dilatation for more than one hundred years. This method has been found to be relatively safe and is associated with few complications. Laminaria is thought to function as the active ingredient in dilatation by mechanical stretching and biochemical changes in the cervical mucus. During the past several years, several hundreded laminaria tents have been used for this purpose in our hospital without any serious sequelae. We have had 3 complications which consider significant.