Intestinal Anastomosis by Use of a Memory-shaped Compression Anastomosis Clip (Hand CAC 30): Early Clinical Experience

이학윤,Jin-Hee Woo,Si-Young Park,Nam-Wook Kang,Ki-Jae Park,Hong-Jo Choi 대한대장항문학회 2012 Annals of Coloproctolgy Vol.28 No.2

Purpose: The safety and the efficacy of the compression anastomosis clip (Hand CAC 30) have been demonstrated by animal studies. This study was designed to evaluate the clinical validity of the Hand CAC 30 in enterocolic side-to-side anastomosis after colonic or enteric resections. Methods: A non-randomized prospective data collection was performed for patients undergoing a side-to-side anastomosis using the Hand CAC 30. Eligibility criteria for the use of the Hand CAC 30 were for anastomoses between the colon and the ileum or between two small bowels. The primary short-term endpoint was the rate of anastomotic leakage. Other clinical outcomes, including intra- and postoperative complications, length of operation time and hospital stay, and the clip elimination time were recorded. Results: A total of 63 patients (male, 36) underwent an enteric or right-sided colonic resection followed by a side-to-side anastomosis using the Hand CAC 30. Laparoscopic surgery was performed in 36 patients, in whom one patient who underwent a laparoscopic right hemicolectomy was converted to an open procedure (1/32, 3.1%). One patient with ascending colon cancer showed postoperative anastomotic leakage and died of co-morbid ischemic heart disease. There were no other surgical mortalities. The exact date of expulsion of the clip could not be recorded because most patients were not aware of clip elimination. No patients manifested clinical symptoms of anastomotic stricture. Conclusion: Short-term evaluation of the Hand CAC 30 anastomosis in patients undergoing enterocolic surgery proved it to be a safe and efficacious alternative to the standard hand-sewn or stapling technique. Purpose: The safety and the efficacy of the compression anastomosis clip (Hand CAC 30) have been demonstrated by animal studies. This study was designed to evaluate the clinical validity of the Hand CAC 30 in enterocolic side-to-side anastomosis after colonic or enteric resections. Methods: A non-randomized prospective data collection was performed for patients undergoing a side-to-side anastomosis using the Hand CAC 30. Eligibility criteria for the use of the Hand CAC 30 were for anastomoses between the colon and the ileum or between two small bowels. The primary short-term endpoint was the rate of anastomotic leakage. Other clinical outcomes, including intra- and postoperative complications, length of operation time and hospital stay, and the clip elimination time were recorded. Results: A total of 63 patients (male, 36) underwent an enteric or right-sided colonic resection followed by a side-to-side anastomosis using the Hand CAC 30. Laparoscopic surgery was performed in 36 patients, in whom one patient who underwent a laparoscopic right hemicolectomy was converted to an open procedure (1/32, 3.1%). One patient with ascending colon cancer showed postoperative anastomotic leakage and died of co-morbid ischemic heart disease. There were no other surgical mortalities. The exact date of expulsion of the clip could not be recorded because most patients were not aware of clip elimination. No patients manifested clinical symptoms of anastomotic stricture. Conclusion: Short-term evaluation of the Hand CAC 30 anastomosis in patients undergoing enterocolic surgery proved it to be a safe and efficacious alternative to the standard hand-sewn or stapling technique.

A study on pressurizer cutting scenario for radiation dose reduction for workers using VISIPLAN

이학윤,김선일,송종순 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.7

The operations in the design lifecycle of a nuclear power plant targeted to be decommissioned lead to neutron activation. Operations in the decommissioning process include cutting, decontamination, disposal, and processing. Among these, cutting is done close to the target material, and thus workers are exposed to radiation. As there are only a few studies on pressurizers, there arises the need for further research to assess the radiation exposure dose. This study obtained the specifications of the AP1000 pressurizer of Westinghouse and the distribution of radionuclide inventory of a pressurizer in a pressurised water reactor for evaluation based on literature studies. A cutting scenario was created to develop an optimal method so that the cut pieces fill a radioactive solid waste drum with dimensions 0.571 m 0.834 m. The estimated exposure dose, estimated using the tool VISIPLAN SW, in terms of the decontamination factor (DF) ranged from DF-0 to DF-100, indicating that DF-90 and DF-100 meet the ICRP recommendation on exposure dose 0.0057 mSv/h. At the end of the study, although flame cutting was considered the most efficient method in terms of cutting speed, laser cutting was the most reasonable one in terms of the financial aspects and secondary waste

미주 한국어교육기관의 교원 선발 및 교육 현황

이학윤 국제한국어교육학회 2022 국제한국어교육학회 학술대회논문집 Vol.2022 No.-

VISIPLAN을 이용한 가압경수로 해체 시 가압기 절단 시나리오 연구

이학윤,김선일,송종순 대한방사선방어학회 2021 대한방사선방어학회 학술발표회 논문요약집 Vol.2021 No.11

Microcystic cystadenoma와 동반된 췌장 결핵, 1예

이학윤,김성흔,김영훈,노미숙,이진화 대한외과학회 2003 대한외과학회 학술대회 초록집 Vol.2003 No.11

A Study on the Construction of Cutting Scenario for Kori Unit 1 Bio-shield considering ALARA

이학윤,이민호,양기태,안준열,송종순 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.11

Nuclear power plants are subjected to various processes during decommissioning, including cutting, decontamination, disposal, and treatment. The cutting of massive bio-shields is a significant step in the decommissioning process. Cutting is performed near the target structure, and during this process, workers are exposed to potential radioactive elements. However, studies considering worker exposure management during such cutting operations are limited. Furthermore, dismantling a nuclear power plant under certain circumstances may result in the unnecessary radiation exposure of workers and an increase in secondary waste generation. In this study, a cutting scenario was formulated considering the bio-shield as a representative structure. The specifications of a standard South Korean radioactive waste disposal drum were used as the basic conditions. Additionally, we explored the hot-to-cold and cold-to-hot methods, with and without the application of polishing during decontamination. For evaluating various scenarios, different cutting time points up to 30 years after permanent shutdown were considered, and cutting speeds of 1–10nullm2/h were applied to account for the variability and uncertainty attributable to the design output and specifications. The obtained results provide fundamental guidelines for establishing cutting methods suitable for large structures.

가축매몰지 오염지하수 정량화 산정을 위한 전기비저항탐사의 적용

이학윤,김종태,김건하,정교철 대한지질공학회 2014 대한지질공학회 학술발표회논문집 Vol.2014 No.-

전기비저항 탐사를 이용한 가축매몰지 오염지하수 범위 및 양수량 평가

이학윤,류정옥,남경훈,김종태,김건하,정교철 대한지질공학회 2015 대한지질공학회 학술발표회논문집 Vol.2015 No.1

Look Around You! A Linguistic Landscape Project in Study Abroad Context in Korea

이학윤(Hak yoon Lee),최범용(Bum yong Choi) 국제한국어교육문화재단 2018 국제한국어교육 Vol.4 No.1

본 연구에서는 한국어 어학연수 프로그램에서 언어경관 (Linguistic Landscape)의 개념이 어떻게 교육적 도구로 사용될 수 있을지에 대해 탐구한다. 언어경관은 주어진 지역 또는 지역의 공공 및 상업 표지판에 대한 언어의 가시성 및 중요성 (Landry and Bourhis, 1997, p.23)에 대해 주목하는 새로운 연구 분야로 최근 들어 학계에 많은 주목을 받고 있으나, 한국어 교육 분야에서는 거의 소개되지 않은 바, 본 연구에서는 언어경관의 개념이 제2 언어의 환경에서 어떻게 적용되는지를 제시하고자 한다. 본 연구는 Watson 외(Watson et al., 2013)에서 소개된 지역 역량(Regional Competence)의 개념에 근거하여 다양한 한국어 표지에 대한 학생들의 분석과 그에 적용된 언어경관의 전반적인 관점에 대해 논의한다. 총 11명의 한국어 학습자들이 어학연수 프로그램에 참가하는 동안 한국의 언어 환경의 복잡성 및 다언어주의에 대해 언어경관의 관점에서 조사하고 분석하여 이를 소셜 네트워크 서비스(SNS)의 하나인 페이스북(Facebook)에서 공유하여 토론을 진행한다. 본 연구에서는 1) 학생들의 최종 연구과제, 2) 페이스북에서의 상호 작용, 3)학생들의 연구과제에 대한 개별 보고서를 언어표지들에 대한 번역 관련 이슈, 대상으로 하는 청중, 사용된 언어의 혼합 현상, 언어 선택의 문제에 초점을 맞추어 분석한다. (조지아주립대학교, 에모리대학교) This study explores how the concept of Linguistic Landscape (LL) is employed as a pedagogical tool in Korean study abroad program. Linguistic landscape is the visibility and salience of languages on public and commercial signs in a given territory or region (Landry and Bourhis, 1997, p.23), and it is a fast evolving research area. However, few studies are found in Korean language education. By illustrating how the concept of LL is applied to Korean as a second language context, this study fills this gap. This study is grounded on how the concept of regional competence (Watson et al. 2013) is relevant to a holistic view of linguistic landscape that is applied in the students’ analysis of different signs in Korea. 11 learners in a study abroad program in Korea participated in this project, and they investigated the complexity of the linguistic environment and multilingualism in Korea while they were in the study abroad program. Then they shared their pictures and analyses on Facebook as a platform for prompt exchanges of ideas. Focusing on the issues of translation, audience and context, and language selection, we analyze 1) students’ final presentation, 2) interaction in Facebook, and 3) reflection papers for this study. (Georgia State University & Emory University)

파상풍 25 예에 대한 임상적 고찰

이학윤 ( Hak Yun Lee ),최희경 ( Hi Kyung Choi ),오병남 ( Byung Nam Oh ),최진자 ( Jin Ja Choi ) 대한내과학회 1969 대한내과학회지 Vol.12 No.1

A clinical study was made of 25 cases of tetanus who had been admitted to the Presbyterian Medical Center in Chonju, Korea from February 1964 to February 1968, not including neonatal tetanus. The results are summerized as follows: 1) The age incidence was