• Journal of Chest Surgery
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• 제50권4호
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• pp.235-241
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• 2017

Background: The Ross/Ross-Konno procedure is considered a good option for irreparable aortic valve disease in pediatric patients because of its hemodynamic performance and potential for growth of the pulmonary autograft. This study is a review of the long-term results of our 20-year experience with the Ross and Ross-Konno operations in a single institution. Methods: Between June 1995 and January 2016, 16 consecutive patients (mean age, $6.0{\pm}5.9years$; range, 16 days to 17.4 years) underwent either a Ross operation (n=9) or a Ross-Konno operation (n=7). The study included 12 males and 4 females, with a median follow-up period of 47 months (range, 6 to 256 months). Results: There were no cases of in-hospital or late mortality. Six reoperations were performed in 5 patients. Four patients underwent right ventricular-pulmonary artery (RV-PA) conduit replacement. Two patients underwent concomitant replacement of the pulmonary autograft and RV-PA conduit 10 years and 8 years after the Ross operation, respectively. The rate of freedom from adverse outcomes of the pulmonary autograft was 88% and 70% at 5 and 10 years, respectively. The rate of freedom from valve-related reoperations was 79% and 63% at 5 and 10 years, respectively. Conclusion: Pulmonary autografts demonstrated good durability with low mortality. The Ross/Ross-Konno procedure is a good option that can be performed safely in pediatric patients with aortic valve disease, even in a small-volume center.

• Journal of Chest Surgery
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• 제14권3호
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• pp.195-201
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• 1981

The results of reconstruction of the lower esophagus with jejunum in a total of 24 cases of primary carcinoma of the lower third esophagus and gastroesophageal carcinoma were presented, and clinical values of substitution for the esophagus with jejunum were also discussed. They were operated in the department of thoracic and cardiovascular surgery, Hanyang University Hospital during the period of 9 years from 1972 to 1981. Surgical managements to lower esophageal reconstruction with jejunum were carded out with not the same procedure in all cases studied, but with three different procedure mentioned below/ In 13 cases of lower third esophagectomy with or without partial `8astrectomy of a total of 24 cases, interposition of jejunum between the esophagus and the stomach were performed after the fashion to esophagojejunostomy with mobilized jejunal loops and 8astro-JeJunostomy with side to side anastomosis. In 7 cases of lower third esophagectomy and total gastrectomy, the continuity of the esophagus were performed the fashion to esophagojejunostomy with mobilized jejunum. In 4 cases of unresectable gastro-esophageal carcinoma, bypass operation of the lower esophagus and the stomach were performed after the fashion to esophagojejunostomy with side to and anastomosis. After the bypass operation, it was observed that oral feeding to the patients was excellent. Following these consecutive series of 20 cases of radical operation for lower esophageal carcinomas and 4 cases of bypass operation for unresectable gastroesophageal carcinomas, no complication such as postoperative leakage and stenosis from anastomotic site or Infection In operating area and operative death were observed.

• Journal of Chest Surgery
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• 제14권3호
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• pp.202-209
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• 1981

The results of reconstruction of the lower esophagus with jejunum in a total of 24 cases of primary carcinoma of the lower third esophagus and gastroesophageal carcinoma were presented, and clinical values of substitution for the esophagus with jejunum were also discussed. They were operated in the department of thoracic and cardiovascular surgery, Hanyang University Hospital during the period of 9 years from 1972 to 1981. Surgical managements to lower esophageal reconstruction with jejunum were carded out with not the same procedure in all cases studied, but with three different procedure mentioned below/ In 13 cases of lower third esophagectomy with or without partial `8astrectomy of a total of 24 cases, interposition of jejunum between the esophagus and the stomach were performed after the fashion to esophagojejunostomy with mobilized jejunal loops and 8astro-JeJunostomy with side to side anastomosis. In 7 cases of lower third esophagectomy and total gastrectomy, the continuity of the esophagus were performed the fashion to esophagojejunostomy with mobilized jejunum. In 4 cases of unresectable gastro-esophageal carcinoma, bypass operation of the lower esophagus and the stomach were performed after the fashion to esophagojejunostomy with side to and anastomosis. After the bypass operation, it was observed that oral feeding to the patients was excellent. Following these consecutive series of 20 cases of radical operation for lower esophageal carcinomas and 4 cases of bypass operation for unresectable gastroesophageal carcinomas, no complication such as postoperative leakage and stenosis from anastomotic site or Infection In operating area and operative death were observed.

• Advances in pediatric surgery
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• 제14권2호
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• pp.125-133
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• 2008

To evaluate the long-term prognosis of biliary atresia after Kasai operation, a total of 14 patients (of the 41 patients operated upon from 1982 to 1997), who had been followed up for more than 10 years, were included in this retrospective study. Eleven out of 14 patients survived with their native livers, and their data analyzed for age at operation, clearing time of jaundice, histological outcome, postoperative complications, effectiveness after the application of an intussusception anti-reflex valve, and quality of life. Average age at surgery was 62.8 days. Serum bilirubin was normalized within three months in all patients. Six among the eleven long-term survivors had ascending cholangitis as one of the postoperative complications. The application of an intussusception anti-reflux valve did not show any statistical significance in long-term survival. Most of long-term survivors appeared to enjoy good quality of life. Kasai operation might not be the definitive treatment for biliary atresia; however, Kasai operation made it possible to achieve long-term survival for patients with biliary atresia when the patients were detected and treated as early as possible.

• Journal of Chest Surgery
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• 제22권5호
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• pp.753-759
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• 1989

Recently, the arterial switch operation has received more interest and increased application for many patients with TGA [Transposition of the Great Arteries]. Not all patients, however, are suitable candidates for this approach, and its success will be measured against the Senning procedure. From June 1982 through June 1989, 48 consecutive patients underwent correction of TGA by a modification of the Senning procedure in our hospital. 34 were males and 14 females, with ages ranging from 3 months to 99 months [mean age 14 months]. The patients were divided into two groups, group I [TGA with intact ventricular septum or without significant pulmonary hypertension] and group II [TGA with significant pulmonary hypertension]. The hospital mortality was 9.5 % in group I and 55.6 % in group lI. 31 patients were discharged from the hospital after a Senning operation and have been followed a mean of 31.2 months. There were 5 late deaths, 3 in group I and 2 in group II. All patients were followed up with EKG, echocardiogram, and in several cases, Holter monitor and cardiac catheterization and angiography were also performed. There have been arrhythmias in 7, superior vena caval obstruction in 5, pulmonary venous obstruction in 2 and tricuspid insufficiency and/or right ventricular dysfunction in 16 patients. The Senning operation for Simple TGA can be performed with a low operative mortality and morbidity, but tricuspid insufficiency and/or depressed right ventricular function can be a problem with prolonged follow up.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2018년도 춘계학술논문요약집
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• pp.251-252
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• 2018

• 한국컴퓨터정보학회논문지
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• 제13권4호
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• pp.87-95
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• 2008

경계면 스캔 구조는 시험대상회로의 출력 값들을 캡쳐하여 스캔경로를 이용하여 TDO로 직렬출력하여 출력 값을 관찰할 수 있는 시험구조이며, Sample/preload명령어를 이용하여 시험대상회로의 특정한 한 순간의 출력만을 캡쳐하여 직렬출력하여 분석할 수 있다. 본 논문에서는 4비트 비동기 카운터회로를 시험대상회로로 선정하고, 정상동작중인 카운터의 특정 출력을 지정하여 특정한 순간의 정적인 출력이 아닌, 연속적인 동적인 출력 값들을 다른 출력결과의 영향 없이 지속적으로 TDO로 출력하여 관찰할 수 있는 선택 가능한 관측점을 가진 시험구조와 시험절차를 개발하였다. 본 논문에서 제안하는 선택 가능한 관측점을 가진 시험구조는 표준에서 정한 시험동작을 정상적으로 수행하며, 관측점의 설정을 위한 명령어가 추가되었다. 4비트 카운터회로에 제안된 선택 가능한 관측점 시험구조를 적용 설계하고, 관측점 설정 명령어를 사용한 시험절차를 Altera의 Max 10.0을 이용한 시뮬레이션을 통해 동작의 정확성을 확인하였다.

• Journal of Chest Surgery
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• 제37권9호
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• pp.793-795
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• 2004

생후 30일 된 형성부전성 좌심증후군 환자에 대하여 무명 동맥과 관상동맥의 국소 순환 하에 완전순환 정지 없이 심박동을 유지한 상태에서 Norwood수술을 시행하였다. 환자는 4개월 후 이차 수술전까지 특별한 문제없이 성장하였고 이차 수술 후 폰탄 수술을 기다리고 있다. 상행 대동맥 근위부 직경이 5 mm 이상 정도로 캐뉼라 삽관이 가능한 경우 완전 순환 정지 없이 Norwood 술식이 가능하며 이를 통하여 좋은 결과를 얻었기에 보고하는 바이다.

• 한국항공운항학회지
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• 제7권1호
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• pp.41-55
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• 1999

In case of KOREA, many difficulties are expected for pilots to adapt to the flight operational environment changes which we will meet suddenly in anytime of the future as the operating plan for GPS is not fully prepared yet. It is because GPS operation is rather difficult compared to other navigation equipments, and it takes much time and experience to be familiar with GPS instrument approach procedure. First of all, it is keenly required to establish GPS instrument approach procedure for the local airports to be familiar with GPS instrument approach procedure. We would like to introduce GPS instrument approach procedure for the Cheju International Airport as a basic model to help you to understand it.

• 조명전기설비학회논문지
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• 제23권11호
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• pp.61-68
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• 2009

A Microgrid is a private small-scale power system composed of distributed energy resources (DERs), storage devices and loads. And it is expected that the Microgrid will come into wide use in the near future. For this, the establishment of the Microgrid operation methodology is a very important problem. Especially, the Microgrid is greatly different from existing private small-scale power systems because of the multiple participants. Therefore, the Microgrid operation considered various requirements according to multiple participants is more complicated than the operation of existing private small-scale power systems. In this paper, Microgrid operation methodology based on a market environment is suggested. Through case studies, the effectiveness of the suggested methodology is verified.