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70篇 您的检索式:作者名="Yasuhiro YAMAMOTO"
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1Partial stent-in-stent placement of biliary metallic stents using a short double-balloon enteroscopy显示文摘Endoscopic intervention is less invasive than percutaneous or surgical approaches and should be considered the primary drainage procedure in most cases with obstructive jaundice.Recently,therapeutic endoscopic retrograde cholangiopancreatography(ERCP) using double-balloon enteroscopy(DBE) has been shown to be feasible and effective,even in patients with surgically altered anatomies.On the other hand,endoscopic partial stent-in-stent(PSIS) placement of selfexpandable metallic stents(SEMSs) for malignant hilar biliary obstruction in conventional ERCP has also been shown to be feasible,safe and effective.We performed PSIS placement of SEMSs for malignant hilar biliary obstruction due to liver metastasis using a short DBE in a patient with Roux-en-Y anastomosis and achieved technical and clinical success.This procedure can result in quick relief from obstructive jaundice in a single session and with short-term hospitalization,even in patients with surgically altered anatomies.Koichiro Tsutsumi Hironari Kato Takeshi Tomoda Kazuyuki Matsumoto Ichiro Sakakihara Naoki Yamamoto Yasuhiro Noma Takayuki Sonoyama Hiroyuki Okada Kazuhide Yamamoto 2012World Journal of Gastroenterology2012,18,45:3
2Changes in portal venous pressure in the early phase after living donor liver transplantation: pathogenesis and clinical implications1,2显示文摘Takashi Ito Tetsuya Kiuchi Hidekazu Yamamoto Fumitaka Oike Yasuhiro Ogura Yasuhiro Fujimoto Kazuhiro Hirohashi and Koichi Tanaka 2003Transplantation2003,,8:3
3Alpha-fetoprotein before and after pegylated interferon therapy for predicting hepatocellular carcinoma development显示文摘AIM: To investigate factors that accurately predict hepatocellular carcinoma(HCC) development after antiviral therapy in chronic hepatitis C(CHC) patients. METHODS: CHC patients who received pegylated interferon and ribavirin were enrolled in this cohort study that investigated the ability of alpha-fetoprotein(AFP) to predict HCC development after interferon(IFN) therapy. RESULTS: Of 1255 patients enrolled, 665 developed sustained virological response(SVR) during mean follow-up period of 5.4 years. HCC was occurred in 89 patients, and 20 SVR patients were included. Proportional hazard models showed that HCC occurred in SVR patients showing AFP ≥ 5 ng/m L before therapy and in non-SVR patients showing AFP ≥ 5 ng/m L before and 1 year after therapy besides older age, and low platelet counts. SVR patients showing AFP ≥ 5 ng/m L before therapy and no decrease in AFP to < 5 ng/m L 1 year after therapy had significantly higher HCC incidence than non-SVR patients showing AFP ≥ 5 ng/m L before therapy and decreased AFP(P = 0.043). AFP ≥ 5 ng/m L before therapy was significantly associated with low platelet counts and high values of alanine aminotransferase(ALT) in stepwise logistic regression analysis. After age, gender, platelet count, and ALT was matched by propensity score, significantly lower HCC incidence was shown in SVR patients showing AFP < 5 ng/m L before therapy than in those showing AFP ≥ 5 ng/m L.CONCLUSION: The criteria of AFP < 5 ng/m L before and 1 year after IFN therapy is a benefical predictor for HCC development in CHC patients.Yasuto Takeuchi Fusao Ikeda Toshiya Osawa Yasuyuki Araki Kouichi Takaguchi Youichi Morimoto Noriaki Hashimoto Kousaku Sakaguchi Tatsuro Sakata Masaharu Ando Yasuhiro Makino Shuji Matsumura Hiroki Takayama Hiroyuki Seki Shintarou Nanba Yuki Moritou Tetsuya Yasunaka Hideki Ohnishi Akinobu Takaki Kazuhiro Nouso Yoshiaki Iwasaki Kazuhide Yamamoto 2015World Journal of Hepatology2015,7,19:3
4Successful biliary drainage using a metal stent through the gastric stoma显示文摘We report a case of biliary drainage for malignant stricture using a metal stent with an ultrathin endoscope through the gastric stoma. A 78-year-old female was referred to our hospital for jaundice and fever. She had undergone percutaneous endoscopic gastrostomy(PEG) for esophageal obstruction after radiation therapy for cancer of the pharynx. Abdominal contrast-enhanced computed tomography showed a 3-cm enhanced mass in the middle bile duct and dilatation of the intrahepatic bile duct. We initially performed endoscopic retrograde cholangiopancreatography(ERCP) with a trans-oral approach. However, neither the side-viewing endoscope nor the ultrathin endoscope passed through the esophageal orifice. Thus, we eventually performed ERCP via the PEG stoma using an ultrathin endoscope. We performed biliary drainage with a 6F introducer selfexpanding metal stent. The cytology findings obtained by brush cytology showed malignancy. Her laboratory results were restored to normal levels after drainage and no complication occurred.Kazuyuki Matsumoto Hironari Kato Koichiro Tsutsumi Yutaka Akimoto Daisuke Uchida Takeshi Tomoda Naoki Yamamoto Yasuhiro Noma Shigeru Horiguchi Hiroyuki Okada Kazuhide Yamamoto 2015World Journal of Gastroenterology2015,21,24:2
5Risk factors for recurrence after transarterial chemoembolization for early-stage hepatocellular carcinoma显示文摘Hideaki Kinugasa Kazuhiro Nouso Yasuto Takeuchi Tetsuya Yasunaka Hideki Onishi Shin-ichiro Nakamura Hidenori Shiraha Kenji Kuwaki Hiroaki Hagihara Fusao Ikeda Yasuhiro Miyake Akinobu Takaki Kazuhide Yamamoto 2012Journal of Gastroenterology2012,,4:2
6Meta-analysis: the effect of interferon on development of hepatocellular carcinoma in patients with chronic hepatitis B virus infection显示文摘Yasuhiro Miyake Haruhiko Kobashi Kazuhide Yamamoto 2009Journal of Gastroenterology2009,,5:2
7Efficacy of Endoscopic Over 3-branched Partial Stent-in-Stent Drainage Using Self-expandable Metallic Stents in Patients With Unresectable Hilar Biliary Carcinoma显示文摘Daisuke Uchida Hironari Kato Shinichiro Muro Yasuhiro Noma Naoki Yamamoto Shigeru Horiguchi Ryo Harada Koichiro Tsutsumi Hirofumi Kawamoto Hiroyuki Okada Kazuhide Yamamoto 2015Journal of Clinical Gastroenterology2015,,6:2
8Phase I and pharmacokinetic study of nab-paclitaxel, nanoparticle albumin-bound paclitaxel, administered weekly to Japanese patients with solid tumors and metastatic breast cancer显示文摘Masashi Ando Kan Yonemori Noriyuki Katsumata Chikako Shimizu Taizo Hirata Harukaze Yamamoto Kenji Hashimoto Mayu Yunokawa Kenji Tamura Yasuhiro Fujiwara 2012Cancer Chemotherapy and Pharmacology2012,,2:2
9Conservative reconstruction using stents as salvage therapy for disruption of esophago-gastric anastomosis显示文摘Esophagectomy with extended lymphadenectomy and gastric conduit reconstruction is a radical procedure for the treatment of esophageal cancer that is associated with a high morbidity rate.Gastric conduit necrosis is a fatal complication that occurs in 2%of patients.Conventionally,two-stage salvage surgery consisting of removal of the necrotic gastric conduit followed by reconstruction has been performed;however,this procedure has a high morbidity rate.We describe a61-year-old man who underwent minimally invasive esophagectomy complicated by slowly progressive gastric conduit necrosis associated with complete neck drainage and a stable overall condition.There was a 2 cm gap in the anastomosis.Because there was no evidence of residual gastric conduit necrosis,a removable,covered self-expanding metal stent(SEMS)was inserted to bridge the anastomosis.The stent was fixed to the patient's ear with silk thread through the lasso on its proximal end to prevent migration.Eight weeks after insertion,the stent was removed easily without any associated complications.The anastomotic defect was completely bridged with granulation tissue,showing progressive epithelialization without leakage or stenosis.The patient was discharged home in good general health.This is the first report of the successful conservative management of esophago-gastric conduit anastomosis disruption with SEMS placement.Taro Oshikiri Yoshinobu Yamamoto Ikuya Miki Masahiro Tsuda Tetsu Nakamura Yasuhiro Fujino Masahiro Tominaga Yoshihiro Kakeji 2015World Journal of Gastroenterology2015,21,28:2
10Antiviral effects of the interferon‐induced protein guanylate binding protein 1 and its interaction with the hepatitis C virus NS5B protein显示文摘Yasuhiro Itsui Naoya Sakamoto Sei Kakinuma Mina Nakagawa Yuko Sekine‐Osajima Megumi Tasaka‐Fujita Yuki Nishimura‐Sakurai Gouki Suda Yuko Karakama Kako Mishima Machi Yamamoto Takako Watanabe Mayumi Ueyama Yusuke Funaoka Seishin Azuma Mamoru Watanabe 2009Hepatology2009,,6:1
11Relation between functional forms of coal nitrogen and formation of NOx precursors during rapid pyrolysis显示文摘Shinji Kambara Takayuki Takarada Yasuhiro Yamamoto 1993Energy & Fuels1993,7,6:1
12Diagnostic value of kinetic analysis using dynamic FDG PET in immunocompetent patients with primary CNS lymphoma显示文摘Yoshihiro Nishiyama Yuka Yamamoto Toshihide Monden Yasuhiro Sasakawa Nobuyuki Kawai Katashi Satoh Motoomi Ohkawa 2007European Journal of Nuclear Medicine and Molecular Imaging2007,,1:1
13Population concen- tration,urbanization and demographic transition显示文摘Yasuhiro Sato Kazuhiro Yamamoto 2005Jour- nal of Urban Economics2005,,58:1
14Feasibility of gastric endoscopic submucosal dissection in elderly patients aged≥80 years显示文摘BACKGROUND Endoscopic resection,especially endoscopic submucosal dissection(ESD),is increasingly performed in elderly patients with early gastric cancer,and lesions beyond the expanded indications are also resected endoscopically in some patients.It is essential to assess whether gastric ESD is safe and suitable for elderly patients and investigate what type of lesions carry an increased risk of ESD-related complications.AIM To assess the efficacy and feasibility of gastric ESD for elderly patients,and define high-risk lesions and prognostic indicators.METHODS Among a total of 1169 sessions of gastric ESD performed in Kanagawa Cancer Center Hospital from 2006 to 2014,179 sessions(15.3%)were performed in patients aged≥80 years,and 172 of these sessions were done in patients with a final diagnosis of gastric cancer.These patients were studied retrospectively to evaluate short-term outcomes and survival.The short-term outcomes included the rates of en bloc resection and curative resection,complications,and procedurerelated mortality.Curability was assessed according to the Japanese Gastric Cancer Treatment Guidelines 2010.Fisher’s exact test was used to statistically analyze risk factors.Clinical characteristics of each group were compared using Fisher’s exact test and Mann-Whitney U test.Survival rates at each time point were based on Kaplan-Meier estimation.Overall survival rates were compared between patients with gastric cancer in each group with use of the log-rank test.To identify prognostic factors that jointly predict the hazard of death while controlling for model overfitting,we used the least absolute shrinkage and selection operator(LASSO)Cox regression model including factors curative/noncurative,age,gender,body mass index,prognostic nutritional index,Charlson comorbidity index(CCI),Glasgow prognostic score,neutrophil-to-lymphocyte ratio,and antithrombotic agent use.We selected the LASSO Cox regression model that resulted in minimal prediction error in 10-fold cross-validation.P<0.05 was considered statistically significant.RESULTS The en bloc dissection rate was 97.1%,indicating that a high quality of treatment was achieved even in elderly patients.As for complications,the rates of bleeding,perforation and aspiration pneumonitis were 3.4%,1.1%and 0.6%,respectively.These complication rates indicated that ESD was not associated with a particularly higher risk in elderly patients than in nonelderly patients.A dissection incision>40 mm,lesions associated with depressions,and lesions with ulcers were risk factors for post-ESD bleeding,and location of the lesion in the upper third of the stomach was a risk factor for perforation in elderly patients(P<0.05).Location of the lesion in the lower third of the stomach tended to be associated with a higher risk of bleeding.The overall survival(OS)did not differ significantly between curative and noncurative ESD(P=0.69).In patients without additional surgery,OS rate was significantly lower in patients with a high CCI(≥2)than in those with a low CCI(≤1)(P<0.001).CONCLUSION Gastric ESD is feasible even in patients aged≥80 years.Observation without additional surgery after noncurative ESD is reasonable,especially in elderly patients with CCI≥2.Yasuhiro Inokuchi Ayaka Ishida Kei Hayashi Yoshihiro Kaneta Hayato Watanabe Kazuki Kano Mitsuhiro Furuta Kosuke Takahashi Hirohito Fujikawa Takanobu Yamada Kouji Yamamoto Nozomu Machida Takashi Ogata Takashi Oshima Shin Maeda 2022World Journal of Gastrointestinal Endoscopy2022,14,1:1
15Comparison between the location and the histomorphological/immunohistochemical characteristics of noninvasive neoplasms of the ampulla of Vater显示文摘Yoshiro Yamamoto Tetsuo Nemoto Yoichiro Okubo Yasuhiro Nihonyanagi Takao Ishiwatari Kensuke Takuma Naobumi Tochigi Naoki Okano Megumi Wakayama Yoshinori Igarashi Kazutoshi Shibuya 2014Human Pathology2014,,9:1
16A practical design of multiloop robust PID control systems显示文摘Masaru Katayama Toru Yamamoto Yasuhiro Mada 2004Electrical Engineering in Japan2004,147,1:1
17Prognotic impact of serum follistatin in patients with hepatocellular carcinoma显示文摘Takeshi Tomoda Kazuhiro Nouso Koji Miyahara Sayo Kobayashi Hideaki Kinugasa Junki Toyosawa Hiroaki Hagihara Kenji Kuwaki Hideki Onishi Shinichiro Nakamura Fusao Ikeda Yasuhiro Miyake Hidenori Shiraha Akinobu Takaki Kazuhide Yamamoto 2013J Gastroenterol Hepatol2013,,8:1
18THROMBOMODULIN ALFA IN THE TREATMENT OF INFECTIOUS PATIENTS COMPLICATED BY DISSEMINATED INTRAVASCULAR COAGULATION: SUBANALYSIS FROM THE PHASE 3 TRIAL显示文摘Naoki Aikawa Shuji Shimazaki Yasuhiro Yamamoto Hidehiko Saito Ikuro Maruyama Ryuzo Ohno Akio Hirayama Yoshikazu Aoki Nobuo Aoki 2011Shock2011,,4:1
19Antibacterial activity of ZnO powder with crystallographic orientation显示文摘Toshiaki Ohira Osamu Yamamoto Yasuhiro Iida Zenbe-e Nakagawa 2008Journal of Materials Science: Materials in Medicine2008,,3:1
20Population concentration, urbanization, and demographic transition显示文摘Yasuhiro Sato Kazuhiro Yamamoto 2005Journal of Urban Economics2005,,1:1
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