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Yuki Fujii,Yoshihide Kanno,Shinsuke Koshita,Takahisa Ogawa,Hiroaki Kusunose,Kaori Masu,Toshitaka Sakai,Keisuke Yonamine,Yujiro Kawakami,Toji Murabayashi,Fumisato Kozakai,Yutaka Noda,Hiroyuki Okada,Kei 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.2
Background/Aims: This study aimed to identify the predictive factors for inaccurate endoscopic ultrasound-guided fine needleaspiration (EUS-FNA) diagnosis of swollen lymph nodes without rapid on-site cytopathological evaluation. Methods: Eighty-three consecutive patients who underwent EUS-FNA for abdominal or mediastinal lymph nodes from January2008 to June 2017 were included from a prospectively maintained EUS-FNA database and retrospectively reviewed. The sensitivity,specificity, and accuracy of EUS-FNA for the detection of neoplastic diseases were calculated. Candidate factors for inaccurate diagnosis(lymph node size and location, needle type, puncture route, number of passes, and causative disease) were evaluated by comparisonbetween accurately diagnosed cases and others. Results: The final diagnosis of the punctured lymph node was classified as neoplastic (65 cases: a metastatic lymph node, malignantlymphoma, or Crow-Fukase syndrome) or non-neoplastic (18 cases: a reactive node or amyloidosis). The sensitivity, specificity, andaccuracy were 83%, 94%, and 86%, respectively. On multivariate analyses, small size of the lymph node was the sole predictive factor forinaccurate EUS-FNA diagnosis with a significant difference (odds ratios, 19.8; 95% confidence intervals, 3.15–124; p=0.0015). Conclusions: The lymph node size of <16 mm was the only independent factor associated with inaccurate EUS-FNA diagnosis ofswollen lymph nodes.
High-frequency Induction Heating for Tiny Foreign Metals
Shinya Kurachi,Naoki Yamamoto,Hiroaki Yamada,Toshihiko Tanaka,Eiji Hiraki,Yukiharu Yamada,Tatsuya Nagao,Yasuhiro Miyake,Yujiro Noda 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
The anxiety of tiny metal contamination into resin materials in the manufacturing process has become one of the serious issues. Because it may often cause of overheat in lithium-ion batteries, flat panel displays, and so on. Therefore, a study on detecting method of the tiny metals is a significant issue. The authors have been investigating the high-frequency induction heating (IH) based approach for tiny metals detection. In this paper, effective magnetic circuit design and IH conditions are discussed and demonstrated from theoretical and experimental point of view.
Yoshihide Kanno,Kei Ito,Shinsuke Koshita,Takahisa Ogawa,Hiroaki Kusunose,Kaori Masu,Toshitaka Sakai,Toji Murabayashi,Sho Hasegawa,Fumisato Kozakai,Yujiro Kawakami,Yuki Fujii,Yutaka Noda 대한소화기내시경학회 2018 Clinical Endoscopy Vol.51 No.3
Background/Aims: Although both radial- and convex-arrayed endoscopic ultrasonography (EUS) scopes are widely used forobservational EUS examinations, there have been few comparative studies on their power of visualization. The aim of this study was toevaluate the capability of these EUS scopes for observation of the pancreatobiliary junction. Methods: The rate of successful visualization of the pancreatobiliary junction was retrospectively compared between a radial-arrayedand a convex-arrayed echoendoscope, from a prospectively maintained database. Study periods were defined as January 2010 toDecember 2012 for the radial group, and February 2015 to October 2016 for the convex group because the respective scope wasmainly used during those periods. Results: During the study period, 1,660 cases with radial EUS and 1,984 cases with convex EUS were recruited. The success rates ofobservation of the pancreatobiliary junction were 80.0% and 89.5%, respectively (p<0.0001). Conclusions: The capability of visualization of the pancreatobiliary junction in observational EUS was found to be better with aconvex-arrayed than with a radial-arrayed echoendoscope