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( Hiroyasu Iwasaki ),( Takashi Mizushima ),( Yuta Suzuki ),( Shigeki Fukusada ),( Kenta Kachi ),( Takanori Ozeki ),( Kaiki Anbe ),( Hironobu Tsukamoto ),( Fumihiro Okumura ),( Takashi Joh ),( Hitoshi 대한소화기학회 2017 Gut and Liver Vol.11 No.1
Background/Aims: Self-expandable metallic stent (SEMS) placement is effective for dysphagia that results from malignant obstruction of the esophagus or gastric cardia; however, stent-related complications may be life-threatening. Thus, the goal of this study was to identify risk factors associated with complications following esophageal stenting. Methods: Of the 71 patients who underwent SEMS placement for dysphagia as a result of malignant stricture of the esophagus or gastric cardia, 53 patients with squamous cell carcinoma or adenocarcinoma, without previous SEMS placement, without a fistula, and without recurrent tumor after surgery were retrospectively identified. The occurrence of stent-related complications was used as an endpoint. Results: Stentrelated complications were identified in 26 patients (49.1%), and major complications occurred in 14 patients (26.4%). The use of an Ultraflex stent (odds ratio [OR], 6.81; 95% confidence interval [CI], 1.54 to 30.00; p=0.011) and prior chemotherapy (OR, 6.13; 95% CI, 1.46 to 25.70; p=0.013) were significantly associated with stent-related complications. Moreover, the use of an Ultraflex stent (OR, 19.60; 95% CI, 2.26 to 170.00; p=0.007) and prior radiation (OR, 25.70; 95% CI, 2.37 to 280.00; p=0.008) significantly increased the risk of major complications. Conclusions: The use of an Ultraflex stent and prior radiation and/or chemotherapy may represent risk factors for complications following esophageal SEMS placement. (Gut Liver 2017;11:47-54)
Yosikazu Isikawa,Toshio Mizushima,Souta Miyamoto,Keigou Kumagai,Mako Nakahara,Hiroaki Okuyama,Takashi Tayama,Tomohiko Kuwai,Pascal Lejay 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The temperature dependences of the magnetization and the specific heat of the ferromagneticcompound DyFe2Zn20 have been measured in detail in various magnetic fields. We have observedanomalous magnetic behaviors, i.e., a strong anisotropy at 2 K, the disappearance of this anisotropyat temperatures between approximately 30 K and Tc, and an anomalous behavior of the specificheat in magnetic fields at temperatures near 20 K. These anomalous phenomena have been analyzedbased on the strong exchange interaction between the Fe itinerant electrons and the Dy localizedelectrons, as well as the crystalline electric field, the Zeeman energy, and an usual exchange interactionbetween two Dy atoms. The higher Tc of DyFe2Zn20 compared with that of DyRu2Zn20 iscaused by this exchange interaction between the Fe and the Dy atoms.
( Tadahisa Inoue ),( Fumihiro Okumura ),( Takashi Mizushima ),( Hirotada Nishie ),( Hiroyasu Iwasaki ),( Kaiki Anbe ),( Takanori Ozeki ),( Kenta Kachi ),( Shigeki Fukusada ),( Yuta Suzuki ),( Hitoshi 대한소화기기능성질환·운동학회 2016 Gut and Liver Vol.10 No.1
Background/Aims: A barbed puncture needle with a side hole was recently developed to improve sample quality and quantity in endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA). In this study, we retrospectively assessed the usefulness of this puncture needle. Methods: Factors affecting diagnostic yield, safety, and diagnostic accuracy were investigated in 76 patients who consecutively underwent EUS-FNA for neoplastic lesions at our hospital between January and December 2013. Results: The procedure was successful in all cases; the rates of sample collection and determination of the correct diagnosis were 92.1% and 89.5%, respectively. The mean number of needle passes required for diagnosis was 1.1. Complications included mild intraluminal bleeding in two patients (2.6%). Multivariate analysis revealed that lesion size (≤20 mm) was significantly associated with a decreased chance of determining the correct diagnosis. Conclusions: Core biopsy needles with a side hole are safe and provide a satisfactory diagnostic yield. However, the side hole may potentially reduce the rate of making the correct diagnosis in small lesions. (Gut Liver 2016;10:51-57)