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Atsushi Goto,Takeshi Okamoto,Ryo Ogawa,Kouichi Hamabe,Shinichi Hashimoto,Jun Nishikawa,Taro Takami 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.4
Background/Aims: Intralesional steroid injections have been administered as prophylaxis for stenosis after esophageal endoscopicsubmucosal dissection. However, this method carries a risk of potential complications such as perforation because a fine needle is usedto directly puncture the postoperative ulcer. We devised a new method of steroid intralesional infusion using a spray tube and evaluatedits efficacy and safety. Methods: Intralesional steroid infusion using a spray tube was performed on 27 patients who underwent endoscopic submucosal dissectionfor superficial esophageal cancer with three-quarters or more of the lumen circumference resected. The presence or absence ofstenosis, complications, and the number of endoscopic balloon dilations (EBDs) performed were evaluated after treatment. Results: Although stenosis was not observed in 22 of the 27 patients, five patients had stenosis and dysphagia requiring EBD. The stenosisin these five patients was relieved after four EBDs. No complications related to intralesional steroid infusion using the spray tubewere observed. Conclusions: Intralesional steroid infusion using a spray tube is a simple and safe technique that is adequately effective in preventingstenosis (clinical trial number, UMIN000037567).
Mitsuharu Oguma,Khandoker Abu Raihan,Shinichi Goto,Kouseki Sugiyama,Makihiko Mori,Kazuya Oyama 한국자동차공학회 2001 한국자동차공학회 Symposium Vol.- No.-
GTL is a liquid state in the normal temperature and pressure. It has high cetane number and other properties of it are comparable with that of diesel fuel. Therefore GTL can be alternative fuel of compression ignition engine. Furthermore, there is little sulfur and aromatic, so clean exhaust emission of diesel engine fueled with GTL can be expected.<br/> In this study, engine performances and exhaust emissions characteristics of compression ignition engine fueled with GTL were investigated by comparison with diesel fuel.<br/> Diesel engine could be operated fueled with GTL without any special modify for the test engine. With the high cetane number of GTL, the ignition lag was shorter. and the combustion started earlier than that of diesel fuel Brake thermal efficiency operated with GTL increased at middle load conditions, because incomplete combustion emission such as CO and THC were lower than that of diesel fuel operation. NOx emission operated with GTL was comparable to diesel fuel. and there was a little decrease at high load. With GTL, soot emission was lower than with diesel fuel at above middle load condition. It seemed to be a reason of soot reduction Ihallhere was little sulphur contained in GTL.<br/>