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Long-term result of endoscopic Histoacryl （N-butyl-2-cyanoacrylate）injection for treatment of gastric varices

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World Journal of Gastroenterology 2011年第11期17卷 1494-1500页

作者： Eun Jung Kang Soung Won Jeong Jae young Jang Joo young Cho Sae Hwan Lee Hyun Gun kim Sang Gyune kim young Seok kim young Koog Cheon young Deok Cho Hong soo kim Boo Sung kim Institute for Digestive Research Department of Internal MedicineSoonchunhyang University College of MedicineSeoul HospitalSeoul 140-743South Korea

AIM:To evaluate the long-term efficacy and safety of endoscopic obliteration with Histoacryl  for treatment of gastric variceal bleeding and ***:Between January 1994 and March 2010 at soonChunHyang University Hospital,a total of 127 patients with gastric varices received Histoacryl  injections *** hundred patients underwent endoscopic Histoacryl  injections because of variceal bleeding,the other 27 patients received such injections as a prophylactic ***:According to Sarin classification,56 patients were GOV1,61 patients were GOV2 and 10 patients were *** of the varices were large(F2 or F3,111 patients).The average volume of Histoacryl  per each session was 1.7±1.3 cc and mean number of sessions was 1.3±0.6.(1 session-98 patients,2 sessions-25 patients,≥3 sessions-4 patients).Twenty-seven patients with high risk of bleeding(large or fundal or RCS+or Child C) received Histoacryl  injection as a primary prophylactic *** these patients,hepatitis B virus was the major etiology of cirrhosis,25 patients showed GOV1 or 2(92.6%)and F2 or F3 accounted for 88.9%(n=24).The rate of initial hemostasis was 98.4%and recurrent bleeding within one year occurred in 18.1%of *** hemostasis during episodes of rebleeding was achieved in 73.9%of *** survival was 50 mo (95%CI 30.5-69.5).Major complications occurred in 4 patients(3.1%).The rebleeding rate in patients with hepatocellular carcinoma or GOV2 was higher than in those with other *** of the 27 subjects who were treated prophylactically experienced treatment-related *** survival rates of the 127 patients at 6 mo,1,3,and 5 years were 92.1%,84.2%,64.2%,and 45.3%,*** 6 mo cumulative survival rate of the 27 patients treated prophylactically was 75%.CONCLUSION:Histoacryl  injection therapy is an effective treatment for gastric varices and also an effective prophylactic treatment of gastric varices which

关键词： Gastric varix Prophylaxis Histoacryl  (Nbutyl-2-cyanoacrylate) Histoacryl  injection Treatment of gastric varix

Is percutaneous endoscopic gastrostomy tube placement safe in patients with ventriculoperitoneal shunts?

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World Journal of Gastroenterology 2009年第25期15卷 3148-3152页

作者： Jin-soo kim Yong-Wan Park Hyung-Keun kim young-Seok Cho Sung-soo kim Na-Ri Youn Hiun-Suk Chae Division of Gastroenterology Department of Internal MedicineCollege of MedicineThe Catholic University of KoreaUijeongbu St. Mary's Hospital

AIM:To investigate whether percutaneous endoscopic gastrostomy (PEG) tube placement is safe in patients with ventriculoperitoneal (VP) ***: This was a retrospective study of all patients undergoing PEG insertion at our institution between June 1999 and June 2006. Post-PEG complications were compared between two groups according to the presence or absence of VP shunts. VP shunt infection rates, the interval between PEG placement and VP shunt catheter insertion, and long-term follow-up were also ***: Fifty-five patients qualified for the study. Seven patients (12.7%) had pre-existing VP shunts. All patients received prophylactic antibiotics. The complication rate did not differ between VP shunt patients undergoing PEG (PEG/VP group) and non-VP shunt patients undergoing PEG (control group) [1 (14.3%) vs 6 (12.5%), P=1.000]. All patients in the PEG/VP group had undergone VP shunt insertion prior to PEG placement. The mean interval between VP shunt insertion and PEG placement was 308.7 d (range, 65-831 d). The mean follow-up duration in the PEG/VP group was 6.4 mo (range, 1-15 mo). There were no VP shunt infections, although one patient in the PEG/VP group developed a minor peristomal infection during ***: Complications following PEG placement in patients with VP shunts were infrequent in this study.

关键词： Percutaneous endoscopic gastrostomy Ventriculoperitoneal shunt Complication Ventriculo- peritoneal shunt infection Prophylactic antibiotic

Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films

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Microsystems & Nanoengineering 2023年第5期9卷 233-243页

作者： Jin soo Park soo young Jung Dong Hun kim Jung Ho Park Ho Won Jang Tae Geun kim Seung-Hyub Baek Byung Chul Lee Bionics Research Center Korea Institute of Science and TechnologySeoul 02792Republic of Korea Department of Electrical Engineering Korea UniversitySeoul 02841Republic of Korea Center for Electronic Materials Korea Institute of Science and TechnologySeoul 02792Republic of Korea Department of Material Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Division of Bio-Medical Science and Technology KIST SchoolUniversity of Science and Technology(UST)Seoul 02792Republic of Korea KHU-KIST Department of Converging Science and Technology Kyung Hee UniversitySeoul 02447Republic of Korea

Due to its additional frequency response,dual-frequency ultrasound has advantages over conventional ultrasound,which operates at a specific frequency ***,a tunable frequency from a single transducer enables sonographers to achieve ultrasound images with a large detection area and high *** facilitates the availability of more advanced techniques that simultaneously require low-and high-frequency ultrasounds,such as harmonic imaging and image-guided *** this study,we present a novel method for dual-frequency ultrasound generation from a ferroelectric piezoelectric micromachined ultrasound transducer(PMUT).Uniformly designed transducer arrays can be used for both deep low-resolution imaging and shallow high-resolution *** switch the ultrasound frequency,the only requirement is to tune a DC bias to control the polarization state of the ferroelectric *** vibration of the PMUT membrane strongly depends on the polarization state,producing low-and high-frequency ultrasounds from a single excitation *** strategy for dual-frequency ultrasounds meets the requirement for either multielectrode configurations or heterodesigned elements,which are integrated into an ***,this technique significantly reduces the design complexity of transducer arrays and their associated driving circuits.

关键词： piezoelectric ferroelectric enable

A completely isolated intestinal duplication cyst mimicking ovarian cyst torsion in an adult

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World Journal of Gastroenterology 2014年第2期20卷 603-606页

作者： Jae young Park Kyu-Hee Her Bong soo kim young Hee Maeng Medical course Jeju National University School of MedicineJeju 690-767South Korea Department of Surgery Jeju National University School of MedicineJeju 690-767South Korea Department of Radiology Jeju National University School of MedicineJeju 690-767South Korea Department of Pathology Jeju National University School of MedicineJeju 690-767South Korea

Intestinal duplications are rare congenital anomalies that can occur anywhere in the gastrointestinal *** are most commonly located in the ileum and are usually detected in infancy or early *** segments are usually firmly attached to and sometimes communicate with the normal gastrointestinal ***,intestinal duplications are completely isolated,thus not associated at all with any part of the gastrointestinal *** duplications do not share a common blood supply with the adjacent normal intestinal segment,unlike the usual form of duplication,but rather have a separate vascular *** of completely isolated duplication cysts in adults are extremely rare;we found only five such reports in the English-language medical ***,we report a case of a completely isolated duplication cyst 12 cm long in an adult *** cyst had no connection to any part of the intestinal tract and had a dedicated vascular pedicle.

关键词： Congenital abnormalities Digestive system Duplication Cysts Adult

Computational approaches for fast generation of digital 3D video holograms(Invited Paper)

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Chinese Optics Letters 2009年第12期7卷 1083-1091页

作者： Seung-Cheol kim Eun-soo kim 3D Display Research Center Department of Electronic Engineering Kwangwoon University

Several approaches for fast generation of digital holograms of a three-dimensional （3D） object have been discussed. Among them, the novel look-up table （N-LUT） method is analyzed to dramatically reduce the number of pre-calculated fringe patterns required for computation of digital holograms of a 3D object by employing a new concept of principal fringe patterns, so that problems of computational complexity and huge memory size of the conventional ray-tracing and look-up table methods have been considerably alleviated. Meanwhile, as the 3D video images have a lot of temporally or spatially redundant data in their inter- and intra-frames, computation time of the 3D video holograms could be also reduced just by removing these redundant data. Thus, a couple of computational methods for generation of 3D video holograms by combined use of the N-LUT method and data compression algorithms are also presented and discussed. Some experimental results finally reveal that by using this approach a great reduction of computation time of 3D video holograms could be achieved.

关键词： LUT Computational approaches for fast generation of digital 3D video holograms CGH

Frequency comb-to-comb stabilization over a 1.3-km free-space atmospheric optical link

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Light(Science & Applications) 2022年第9期11卷 2207-2216页

作者： JAEWON YANG DONG IL LEE DONG-CHEL SHIN JAEHYUN LEE BYUNG soo kim HYUN JAY KANG young-JIN kim SEUNG-WOO kim Department of Mechanical Engineering Korea Advanced Institute of Science and Technology(KAIST)291 Daehak-roYuseong-guDaejeon 34141Republic of Korea Presently with Korea Research Institute of Standards and Science(KRISS) 267 Gajeong-roYuseong-guDaejeon 34113Republic of Korea

Stabilizing a frequency comb to an ultra-stable optical frequency reference requires a multitude of optoelectronic peripherals that have to operate under strict ambient ***,the frequency comb-to-comb stabilization aims to synchronize a slave comb to a well-established master comb with a substantial saving in required equipment and ***,we report an utmost case of frequency comb-to-comb stabilization made through a 1.3 km free-space optical(FSO)link by coherent transfer of two separate comb lines along with a feedback suppression control of atmospheric phase *** FSO link offers a transfer stability of 1.7×10-15 at 0.1 s averaging,while transporting the master comb,s stability of 1.2×10-15 at 1.0 s over the entire spectrum of the slave *** remote comb-to-comb stabilization is intended to expedite diverse long-distance ground-to-ground or ground-to-satellite applications;as demonstrated here for broadband molecular spectroscopy over a 6THz bandwidth as well as ultra-stable microwaves generation with phase noise of-80dBc Hz-1 at 1 Hz.

关键词： optical stabilization microwave

Endoscopic band ligation and endoscopic hemoclip placement for patients with Mallory-Weiss syndrome and active bleeding

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World Journal of Gastroenterology 2008年第13期14卷 2080-2084页

作者： young-Seok Cho Hiun-Suk Chae Hyung-Keun kim Jin-soo kim Byung-Wook kim Sung-soo kim Sok-Won Han Kyu-Yong Choi Department of Internal Medicine Uijeongbu St. Mary's Hospital The Catholic University of Korea Ujeongbu 480-717 Korea Department of Internal Medicine Our Lady Mercy Hospital The Catholic University of Korea Bupyeong 403720 Korea Department of Internal Medicine Uijeongbu St. Mary’s Hospital The Catholic University of Korea Ujeongbu 480-717 Korea Department of Internal Medicine Holy Family Hospital The Catholic University of Korea Bucheon 420717 Korea

AIM: To compare the hemostatic efficacy and safety of two mechanical endoscopic methods: endoscopic band ligation (EBL) and endoscopic hemoclip placement (EHP) in patients with actively bleeding Mallory-Weiss syndrome (MWS). METHODS: A prospective randomized study to compare the efficacy and safety of EHP with EBL was performed from January 2002 to August 2005. Forty-one patients with active bleeding from MWS were treated with EHP (n = 21) or EBL (n = 20). RESULTS: There were no significant differences between groups with respect to clinical and endoscopic characteristics. The mean number of hemoclips applied was 3.2 ± 1.5 and the mean number of bands applied was 1.2 ± 0.4. Primary hemostasis was achieved in all patients. Recurrent bleeding was observed in one patient from the EHP group and two from the EBL group. Patients with recurrent bleeding were treated by the same modality as at randomization and secondary hemostasis was achieved in all. There were no significant differences between the two groups in total transfusion amount or duration of hospital stay. No complications or bleeding-related death resulted. CONCLUSION: EHP and EBL are equally effective and safe for the management of active bleeding in patients with Mallory-Weiss syndrome, even in those with shock or comorbid diseases.

关键词： Mallory-Weiss syndrome Hemostasis Endoscopic band ligation Endoscopic clipping

Current status and challenges in sentinel node navigation surgery for early gastric cancer

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Chinese Journal of Cancer Research 2017年第2期29卷 93-99页

作者： Bang Wool Eom young-II kim Hong Man Yoon soo-Jeong Cho Jong Yeul Lee Chan Gyookim soo Jin kim Ji Yoon Rho Seok Ki kim Myeong-Cherl Kook young-Woo kim Keun Won center for gastric cancer national cancer centerrepublic of korea center for diagnostic oncology national cancer centerrepublic of korea

Although a number of feasibility studies for sentinel node （SN） concepts in gastric cancer have been conducted since 2000, there remains a debate regarding detailed detection techniques and oncological safety. Two important multicenter phase II clinical trials were performed in Japan that used different methods and reached different conclusions; one confirmed acceptable results with a false-negative rate of 7%, and the other showed an unacceptably high false-negative rate of 46.4%. The Sentinel Node Oriented Tailored Approach （SENORITA） trial is a multicenter randomized controlled phase 1/I trial being performed in Korea. Patient enrollment is now complete and the long-term results are currently awaited. Recently, an image-guided SN mapping technique using infrared ray/fluorescence was introduced. This method might be a promising technology because it allows the clear visualization of SNs. With regard to the primary tumor, the non-exposed endoscopic wall-inversion surgery technique and non-exposure endolaparoscopic full-thickness resection with simple suturing technique have been reported. These methods prevent abdominal infection and tumor seeding and can be good alternatives to conventional laparoscopic gastric wedge resection. For indications, SN navigation surgery can be extended to patients who underwent non-curative endoscopic resection. Although a few studies have been performed on these patients, sentinel concepts may be beneficial to patients as they omit the need for additional gastrectomy. SN navigation surgery can lead to actual organ-preserving surgery and plays a key role in improving the quality of life of patients with early gastric cancer in the future.

关键词： Sentinel node navigation surgery early gastric cancer SENORITA

Expert recommendation system based on analyzing expertise and networks of human resources in National Science & Technology Information Service

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Journal of Central South University 2013年第8期20卷 2212-2218页

作者： YANG Myung-seok KANG Nam-kyu kim Yun-jeong kim Jae-soo CHOI Kwang-nam kim young-kuk NTIS Center Korea Institute of Science and Technology Information Department Of Computer Science and Engineering Chungnam National University

This work aims to implement expert and collaborative group recommendation services through an analysis of expertise and network relations NTIS. First of all, expertise database has been constructed by extracting keywords after indexing national R＆D information in Korea （human resources, project and outcome） and applying expertise calculation algorithm. In consideration of the characteristics of national R＆D information, weight values have been selected. Then, expertise points were calculated by applying weighted values. In addition, joint research and collaborative relations were implemented in a knowledge map format through network analysis using national R＆D information.

关键词： human networks network analysis NTIS R&D information