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Gyeong Geon Lee,Joon Seong Park,Hyung Sun Kim,Dong Sup Yoon,Jin Hong Lim Korean Association of Hepato-Biliary-Pancreatic Su 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.3
Backgrounds/Aims: Postoperative pain management is a key to enhanced recovery after surgery. The aim of this study was to evaluate clinical effect of preoperative intravenous (IV) non-steroidal anti-inflammatory drugs (NSAIDs) on relief of postoperative pain in patients after laparoscopic cholecystectomy. Methods: This single center, retrospective study was conducted between September 2019 and May 2020. A total of 163 patients were divided into two groups: Ibuprofen group (preoperative IV ibuprofen, n = 77) and Ketorolac group (preoperative IV ketorolac, n = 86). The primary outcome was postoperative pain score measured immediately in the recovery room. Results: There was no difference in demographic characteristics between the two groups of patients. Postoperative pain score measured immediately in the recovery room was significantly higher in the Ibuprofen group than in the Ketorolac group (mean value: 5.09 vs. 4.61; p = 0.027). The number of patients who needed analgesics immediately in the recovery room was also higher in the Ibuprofen group than in the Ketorolac group (28 [36.4%] vs. 18 [20.9%]; p = 0.036). Conclusions: In this study, preoperative IV injection with ketorolac reduced postoperative pain and analgesic requirement in the recovery room more effectively than that with ibuprofen. However, both showed similar effects on peak pain and pain at discharge. Numbers of patients requiring additional analgesics were also similar between the two groups.
Lee, Geon Seok,Ji, Gyeong Hwan,Kwon, Gu-Young,Bang, Su Sik,Lee, Yeong Ho,Sohn, Song-Ho,Park, Kijun,Shin, Yong-June Institute of Electrical and Electronics Engineers 2018 IEEE transactions on applied superconductivity Vol.28 No.4
<P>In this paper, we propose a new time-frequency based analysis method that monitors the state of the high temperature superconducting (HTS) cable system in a real-time manner and detects the current imbalance of HTS cable system. The new time-frequency-based method utilizes the cross Wigner–Ville distribution to analyze the time-frequency localized phase difference of the reflected signal, which varies depending on the insulation characteristics of the HTS cable system. Also, a real-world AC 22.9 kV 50 MVA HTS cable system and a current source are used to validate the performance of the new monitoring method in order to detect current imbalance phenomenon.</P>
COVID-19으로 인해 촉발된 원격 실험 수업에 대한 과학교육 전문가들의 인식
이경건 ( Gyeong-geon Lee ),홍훈기 ( Hun-gi Hong ) 한국과학교육학회 2021 한국과학교육학회지 Vol.41 No.5
본 연구에서는 COVID-19으로 인해 촉발된 원격 실험 수업에 대한 과학교육 전문가들의 인식을 조사하였다. 2021년 상반기에 물리교육, 화학교육, 생물교육, 지구과학교육 전문가 총 10인에 대한 반구조화된 질적 인터뷰를 수행하였다. 연구 결과, 과학교육 전문가들은 우선원격 실험 수업을 예비교사교육의 일환으로서 이해하였으며 이를 통하여 기존에 관습적으로 진행되어 왔던 실험 교육의 목적을 재인식하게 되었다고 응답하였다. COVID-19으로 인한 원격 수업 실험의 현실에 관하여는 우선 핸즈온 경험의 부족으로 인한 학습 결손, 교수자 및 학습자의 상호작용 감소 우려, 교수자의 업무량 증가가 언급되었다. 그럼에도 불구하고 과학교육 전문가들은 원격 실험 수업의 적응적 실행 경험을 통해 이를 개선하기 위한 구체적인 방안들을 제시하기도 하였으며, 포스트 코로나 시대의 과학교육의 방향성을 제안하였다. 이에 연구자들은 원격 실험 수업을 핸즈온 수업의 미비한 방식이라기보다는 마인즈온 수업의 보완된 방식으로 이해할 때 이를 더 나은 형태로 설계 및 실행할 수 있는 가능성이 열릴 수 있다고 제안하고, 이와 관련한 추후 연구 주제를 제시하였다. 본 연구는 원격 실험 수업을 과학교육학의 관점에서 보다 심도 있게 이해할 수 있는 단서를 제공한다는 의의를 지닌다. This study investigated science education experts’ perception of remote laboratory sessions (RLS) provoked by the COVID-19 pandemic. We conducted a total of 10 semi-structured interviews with experts in physics, chemistry, biology, and earth science education. As a result, science education experts primarily understood the RLS concerning pre-service teacher education and reconsidered the aim and goal of conventional laboratory education. On practices of RLS provoked by the COVID-19, they pointed out the learning loss due to deficiency of hands-on experience, decreased interactions between instructor and students, and instructors’ increased burden. Meanwhile, they contemplated upon their adaptive implementation of RLS to suggest ways to improve RLS instruction and directions of post-COVID-19 science education. We recommend that RLS should be understood as a complemented version of minds-on teaching rather than a degraded version of hands-on teaching to elicit its full potentials. This study has its own significance providing an in-depth science educational perspective interpreting the RLS phenomena.
이영환 ( Lee Yeong Hwan ),김용범 ( Kim Yong Beom ),정도영 ( Jeong Do Yeong ),이유경 ( Lee Yu Gyeong ),김건영 ( Kim Geon Yeong ),이준승 ( Lee Jun Seung ),이중건 ( Lee Jung Geon ),최덕례 ( Choe Deog Lye ),박미자 ( Park Mi Ja ),이영 대한신장학회 2001 Kidney Research and Clinical Practice Vol.20 No.6
The incidence of Tuberculosis among the patients with end-stage renal disease(ESRD) has increased up to 16 times of that in the general population. The impairment of the cellular immunity in the ESRD patients may have a role in the pathogenesis. Extrapulmonary tuberculous manifestations such as lymph node, peritoneum, and pleura involvement are more frequent in the ESRD patients than in the general population. However, there has been no case of upper gastrointestinal(UGI) bleeding as a result of a gastric tuberculosis in the ESRD patient on hemodialysis. Here we report an unusual case of a hemodialysis patient with UGI bleeding secondary to a tuberculous gastric ulcer. A 31-year-old female on hemodialysis was admitted with melena. Endoscopy revealed a benign gastric ulcer with a visible bleeding vessel at the base, located in the anterior wall of the antrum. An exploratory laparotomy showed multiple, round, small and yellow nodules on the visceral peritoneum as well as a 1-cm sized gastric ulcer. After gastric resection, a histological examination including peritoneal nodules demonstrated chronic granulomatous inflamation with caseous necrosis and giant cells. The patient has been on antituberculosis medication and followed up in the outpatient department without any event for 8 months.