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New 14-mm diameter Niti-S biliary uncovered metal stent for unresectable distal biliary malignant obstruction

World Journal of Gastrointestinal Endoscopy 2018年第1期10卷 16-22页

作者： Masataka Kikuyama Naofumi Shirane shinya kawaguchi Shuzou Terada Tsuyoshi Mukai Ken Sugimoto Departmentof Gastroenterology Komagome Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Department of Gastroenterology Shizuoka General Hospital Department of Gastroenterology Gifu Municipal Hospital Department of Gastroenterology Hamamatsu University School of Medicine

AIM To investigate whether an uncovered self-expandable metal stent(UCSEMS) with a large diameter could prevent recurrent biliary obstruction(RBO).METHODS Thirty-eight patients with malignant biliary obstruction underwent treatment with an UCSEMS with a 14-mm diameter(Niti-S 14). Retrospectively, we evaluated technical and functional success rate, RBO rate, time to RBO, survival time, and adverse events in these *** Stent placement success and functional success were achieved in all patients. Two patients(5.3%) had RBO due to tumor ingrowth or overgrowth. The median time to RBO was 190(range, 164-215) d. The median survival time was 120(range, 18-502) d. The 6-mo non-RBO rate was 91%. Other adverse events other than RBO occurred as follows: Acute cholecystitis, post-ERCP pancreatitis, hemobilia, and fever without exacerbation of liver injury, and liver abscess in 4(10.3%), 3(7.9%), 2(5.3%), 1(2.6%), and 1(2.6%), respectively. Migration of the stents was not *** Niti-S 14 is considered to be a preferable metal stent because of a low rate of RBO with no migration.

关键词： Metal stent Malignant biliary obstruction Pancreatic cancer Migration Pancreatitis Bile duct cancer Overgrowth Recurrent biliary obstruction Ingrowth Adverse event

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High Decomposition Method of PFC

High Decomposition Method of PFC

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第四届中美化学工程会议和第三届中日化工研讨会合并的三边化学工程大会

作者： HeeJoon Kim Wataru Minami Ikuo kawaguchi shinya Hayashi Toyohashi University of Technology Japan

PFCs(Perfluoro compounds) is used as cleaning gas and etching gas at semiconductor industry. Exhausted PFC have strong effect to global worming. For example, exhausted CF4 have very long life at atmosphere (50,000 years), then it effect to global worming 6500 times compare with CO2. Recently, reduction of exhaust PFC is required. High decomposition method of PFC was developed in this research. CF4 have most strong bond among PFC, then CF4 was chosen to investigate of decomposition characterization of PFC.

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Stratifying the risk of lymph node metastasis in undifferentiated-type early gastric cancer

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World Journal of Gastroenterology 2015年第9期21卷 2683-2692页

作者： Yukiko Asakawa Masahiko Ohtaka shinya Maekawa Mitsuharu Fukasawa Yasuhiro Nakayama Tatsuya Yamaguchi Taisuke Inoue Tomoyoshi Uetake Minoru Sakamoto Tadashi Sato Yoshihiko kawaguchi Hideki Fujii Kunio Mochizuki Masao Hada Toshio Oyama Tomotaka Yasumura Kosaku Omata Atsushi Nishiyama Keiichi Naito Hideo Hata Yoshiaki Haba Kazuyuki Miyata Haruhisa Saitoh Yoichi Yamadera Kazuo Miura Akira Kawaoi Tohru Abe Hajime Tsunoda Yuji Honda Masayuki Kurosaki Nobuyuki Enomoto First Department of Internal Medicine Faculty of MedicineUniversity of YamanashiYamanashi 409-3898Japan First Department of Surgery Faculty of MedicineUniversity of YamanashiYamanashi 409-3898Japan Department of Pathology Faculty of MedicineUniversity of YamanashiYamanashi 409-3898Japan Department of Surgery Yamanashi Prefectural Central HospitalYamanashi 400-8506Japan Department of Pathology Yamanashi Prefectural Central HospitalYamanashi 400-8506Japan Department of Surgery Social Insurance Yamanashi HospitalYamanashi 400-0025Japan Department of Pathology Social Insurance Yamanashi HospitalYamanashi 400-0025Japan Department of General Surgery Kofu Kyoritsu HospitalYamanashi 400-0034Japan Department of Pathology Kofu Kyoritsu HospitalYamanashi 400-0034Japan Department of Surgery Kofu Municipal HospitalYamanashi 400-0832Japan Department of Pathology Kofu Municipal HospitalYamanashi 400-0832Japan Department of Surgery Yamanashi Kosei HospitalYamanashi 405-0033Japan Department of Surgery Kanoiwa General HospitalYamanashi 405-0018Japan Department of Pathology Kanoiwa General HospitalYamanashi 405-0018Japan Department of Surgery Social Insurance Kajikazawa HospitalYamanashi 400-0601Japan Department of Surgery Kofu National HospitalYamanashi 400-0006Japan Department of Surgery Fujiyoshida Municipal Medical CenterYamanashi 403-0005Japan Division of Gastroenterology and Hepatology Musashino Red Cross HospitalTokyo 180-0023Japan

AIM:To study how lymph node metastasis(LNM) risk is stratified in undifferentiated-type early gastric cancer(undiff-EGC) dependent on combinations of risk ***:Five hundred and sixty-seven cases with undiff-EGC undergoing gastrectomy with lymphadenectomy were examined *** clinicopathological factors of patient age,location,size,an endoscopic macroscopic tumor form,ulceration,depth,histology,lymphatic involvement(LI) and venous involvement(VI),LNM risk was examined and stratified by conventional statistical analysis and datamining ***:LNM was positive in 44 of 567 cases(7.8%).Univariate analysis revealed > 2 cm,protrusion,submucosal(sm),mixed type,LI and VI as significant prognostic factors and > 2 cm and LI-positive were independent factors by multivariate *** preoperatively evaluable factors excluding LVI,sm and > 2 cm were independent *** to the depth and size,cases were categorized into the low-risk group [m and ≤ 2 cm,0%(LNM incidence)],the moderaterisk group(m and > 2 cm,5.6%; and sm and ≤ 2 cm,6.0%),and the high-risk group(sm and > 2 cm,19.3%).On the other hand,LNM occurred in 1.4% in all LI-negative cases,greatly lower than 28.2% in all LI-positive cases,and LNM incidence was low in LInegative cases even in the moderate- and high-risk ***:LNM-related factors in undiff-EGC were depth and size preoperatively while those were LI and size *** these factors,LI was the most significantly correlated factor.

关键词： Undifferentiated-type early gastric cancer Lymph n

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