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125篇 您的检索式:作者名="Akira YAMADA"
    题名 作者 年代 出处 被引量
1精确测量的地幔体波走时及地幔非均匀性的强度(英文)显示文摘用波形相关法精确地测定了在世界各地发生的87个6级以上地震的P波, PP波和Pdiff波的503个走时数据。记录这些地震波形的是新建于西太平洋地区的海洋半球地震观测网。我们利用这些高精度的走时数据研究了地幔体波的走时残差的范围及地幔非均匀性的强度。结果表明,P波、PP波和Pdiff波的走时残差最大分别为9 s ,11 s和15 s ,这为地幔层析成像反演中应该使用的体波走时残差数据的范围提供了重要信息。超出这一范围的走时残差数据不应该用于反演中,以免歪曲成像结果。我们发现,当震中距小于40°时,P波走时残差的范围为-6到+9 s。而对于40°到99°之间的震中距,P波走时残差的范围为-3到+5s。由于震中距越大,P波穿透地幔越深,我们这一结果提供了直接和确凿的证据,表明上地幔和地幔转换带中的横向非均匀性的强度要远胜于下地幔。我们精确测量的Pdiff波的走时数据表明,在地幔底部存在显著的低速异常,可能与地幔热柱或者超级地幔柱有关。我们使用了一个最新的三维全球层析成像模型来解释这些体波走时数据的空间变化。Akira YAMADA Yuhei OHTA 2006地学前缘2006,13,2:9
2Endoscopic diagnosis for colorectal sessile serrated lesions显示文摘BACKGROUND Hyperplastic polyps are considered non-neoplastic, whereas sessile serrated lesions(SSLs) are precursors of cancer via the ‘‘serrated neoplastic pathway’’. The clinical features of SSLs are tumor size(> 5 mm), location in the proximal colon, coverage with abundant mucus called the ‘‘mucus cap’’, indistinct borders, and a cloud-like surface. The features in magnifying narrow-band imaging are varicose microvascular vessels and expanded crypt openings. However, accurate diagnosis is often difficult.AIM To develop a diagnostic score system for SSLs.METHODS We retrospectively reviewed consecutive patients who underwent endoscopic resection during colonoscopy at the Toyoshima endoscopy clinic. We collected data on serrated polyps diagnosed by endoscopic or pathological examination. The significant factors for the diagnosis of SSLs were assessed using logistic regression analysis. Each item that was significant in multivariate analysis was assigned 1 point, with the sum of these points defined as the endoscopic SSL diagnosis score. The optimal cut-off value of the endoscopic SSL diagnosis score was determined by receiver-operating characteristic curve analysis.RESULTS Among 1288 polyps that were endoscopically removed, we analyzed 232 diagnosed as serrated polyps by endoscopic or pathological examination. In the univariate analysis, the location(proximal colon), size(> 5 mm), mucus cap, indistinct borders, cloud-like surface, and varicose microvascular vessels were significantly associated with the diagnosis of SSLs. In the multivariate analysis, size(> 5 mm;P = 0.033), mucus cap(P = 0.005), and indistinct borders(P = 0.033) were independently associated with the diagnosis of SSLs. Size > 5 mm, mucus cap, and indistinct borders were assigned 1 point each and the sum of these points was defined as the endoscopic SSL diagnosis score. The receiver-operating characteristic curve analysis showed an optimal cut-off score of 3, which predicted pathological SSLs with 75% sensitivity, 80% specificity, and 78.4% accuracy. The pathological SSL rate for an endoscopic SSL diagnosis score of 3 was significantly higher than that for an endoscopic SSL diagnosis score of 0, 1, or 2(P < 0.001).CONCLUSION Size > 5 mm, mucus cap, and indistinct borders were significant endoscopic features for the diagnosis of SSLs. Serrated polyps with these three features should be removed during colonoscopy.Toshihiro Nishizawa Shuntaro Yoshida Akira Toyoshima Tomoharu Yamada Yoshiki Sakaguchi Taiga Irako Hirotoshi Ebinuma Takanori Kanai Kazuhiko Koike Osamu Toyoshima 2021World Journal of Gastroenterology2021,27,13:7
3Long-term effect of lamivudine treatment on the incidence of hepatocellular carcinoma in patients with hepatitis B virus infection显示文摘Mika Kurokawa Naoki Hiramatsu Tsugiko Oze Takayuki Yakushijin Masanori Miyazaki Atsushi Hosui Takuya Miyagi Yuichi Yoshida Hisashi Ishida Tomohide Tatsumi Shinichi Kiso Tatsuya Kanto Akinori Kasahara Sadaharu Iio Yoshinori Doi Akira Yamada Masahide Oshita 2012Journal of Gastroenterology2012,,5:4
4Feasibility and safety of laparoscopic and endoscopic cooperative surgery for gastric submucosal tumors, including esophagogastric junction tumors显示文摘Shu Hoteya Shusuke Haruta Hisashi Shinohara Akihiro Yamada Tsukasa Furuhata Satoshi Yamashita Daisuke Kikuchi Toshifumi Mitani Osamu Ogawa Akira Matsui Toshiro Iizuka Harushi Udagawa Mitsuru Kaise 2014Digestive Endoscopy2014,,4:4
5Associations between circulating microRNAs (miR-21, miR-34a, miR-122 and miR-451) and non-alcoholic fatty liver显示文摘Hiroya Yamada Koji Suzuki Naohiro Ichino Yoshitaka Ando Akira Sawada Keisuke Osakabe Keiko Sugimoto Koji Ohashi Ryouji Teradaira Takashi Inoue Nobuyuki Hamajima Shuji Hashimoto 2013Clinica Chimica Acta2013,,:3
6Intestinal anisakiasis can cause intussusception in adults:An extremely rare condition显示文摘We report an extremely rare case of adult intussusception caused by anisakiasis. A 41-year-old man was admitted into our hospital for right lower abdominal colicky pain. Ultrasonography and computed tomography revealed the presence of intussusception. As pneumodynamic resolution by colonoscopy failed, surgery was performed. The anisakis body was found in the submucosal layer of the resection specimen. The patient was discharged 9 d after the operation. Anisakiasis may cause intussusception in any country where sushi or sashimi now exists as a popular food. If suspicious, detailed clinical interview as to food intake prior to symptom development is crucial.Tomofumi Miura Akira Iwaya Takao Shimizu Junpei Tsuchiya Junichiro Nakamura Satoshi Yamada Tsutomu Miura Masahiko Yanagi Hiroyuki Usuda Iwao Emura Toru Takahashi 2010World Journal of Gastroenterology2010,16,14:3
7Enlarged folds on endoscopic gastritis as a predictor for submucosal invasion of gastric cancers显示文摘BACKGROUND Accurate diagnosis of the depth of gastric cancer invasion is crucial in clinical practice.The diagnosis of gastric cancer depth is often made using endoscopic characteristics of the tumor and its margins;however,evaluating invasion depth based on endoscopic background gastritis remains unclear.AIM To investigate predicting submucosal invasion using the endoscopy-based Kyoto classification of gastritis.METHODS Patients with gastric cancer detected on esophagogastroduodenoscopy at Toyoshima Endoscopy Clinic were enrolled.We analyzed the effects of patient and tumor characteristics,including age,sex,body mass index,surveillance endoscopy within 2 years,current Helicobacter pylori infection,the Kyoto classification,and Lauren’s tumor type,on submucosal tumor invasion and curative endoscopic resection.The Kyoto classification included atrophy,intestinal metaplasia,enlarged folds,nodularity,and diffuse redness.Atrophy was characterized by non-reddish and low mucosa.Intestinal metaplasia was detected as patchy whitish or grayish-white flat elevations,forming an irregular uneven surface.An enlarged fold referred to a fold width≥5 mm in the greater curvature of the corpus.Nodularity was characterized by goosebump-like multiple nodules in the antrum.Diffuse redness was characterized by uniform reddish nonatrophic mucosa in the greater curvature of the corpus.RESULTS A total of 266 gastric cancer patients(mean age,66.7 years;male sex,58.6%;mean body mass index,22.8 kg/m2)were enrolled.Ninety-three patients underwent esophagogastroduodenoscopy for surveillance within 2 years,and 140 had current Helicobacter pylori infection.The mean Kyoto score was 4.54.Fifty-eight cancers were diffuse-type,and 87 cancers had invaded the submucosa.Multivariate analysis revealed that low body mass index(odds ratio 0.88,P=0.02),no surveillance esophagogastroduodenoscopy within 2 years(odds ratio 0.15,P<0.001),endoscopic enlarged folds of gastritis(odds ratio 3.39,P=0.001),and Lauren’s diffuse-type(odds ratio 5.09,P<0.001)were independently associated with submucosal invasion.Similar results were obtained with curative endoscopic resection.Among cancer patients with enlarged folds,severely enlarged folds(width≥10 mm)were more related to submucosal invasion than mildly enlarged folds(width 5-9 mm,P<0.001).CONCLUSION Enlarged folds of gastritis were associated with submucosal invasion.Endoscopic observation of background gastritis as well as the lesion itself may help diagnose the depth of cancer invasion.Osamu Toyoshima Shuntaro Yoshida Toshihiro Nishizawa Akira Toyoshima Kosuke Sakitani Tatsuya Matsuno Tomoharu Yamada Takashi Matsuo Hayato Nakagawa Kazuhiko Koike 2021World Journal of Gastrointestinal Endoscopy2021,13,9:2
8器官异种移植的历史、现状和未来显示文摘Akira Yamada Hugh Auchincloss Jr 黄昕 毛一雷 2001中国实用外科杂志2001,21,5:2
9Predictive factors for body weight loss and its impact on quality of life following gastrectomy显示文摘AIM To determine the predictive factors and impact of body weight loss on postgastrectomy quality of life(QOL). METHODS We applied the newly developed integrated questionnaire postgastrectomy syndrome assessment scale-45, which consists of 45 items including those from the Short Form-8 and Gastrointestinal Symptom Rating Scale instruments, in addition to 22 newly selected items. Between July 2009 and December 2010, completed questionnaires were received from 2520 patients with curative resection at 1 year or more after having undergone one of six types of gastrectomy for Stage Ⅰ gastric cancer at one of 52 participating institutions. Of those, we analyzed 1777 eligible questionnaires from patients who underwent total gastrectomy with Roux-en-Y procedure(TGRY) or distal gastrectomy with Billroth-I(DGBI) or Roux-en-Y(DGRY) procedures. RESULTS A total of 393, 475 and 909 patients underwent TGRY, DGRY, and DGBI, respectively. The mean age of patients was 62.1 ± 9.2 years. The mean time interval between surgery and retrieval of the questionnaires was 37.0 ± 26.8 mo. On multiple regression analysis, higher preoperative body mass index, total gastrectomy, and female sex, in that order, were independent predictors of greater body weight loss after gastrectomy. There was a significant difference in the degree of weight loss(P < 0.001) among groups stratified according to preoperative body mass index(< 18.5, 18.5-25 and > 25 kg/m2). Multiple linear regression analysis identified lower postoperative body mass index, rather than greater body weight loss postoperatively, as a certain factor for worse QOL(P < 0.0001) after gastrectomy, but the influence of both such factors on QOL was relatively small(R2, 0.028-0.080).CONCLUSION While it is certainly important to maintain adequate body weight after gastrectomy, the impact of body weight loss on QOL is unexpectedly small.Kazuaki Tanabe Masazumi Takahashi Takashi Urushihara Yoichi Nakamura Makoto Yamada Sang-Woong Lee Shinnosuke Tanaka Akira Miki Masami Ikeda Koji Nakada 2017World Journal of Gastroenterology2017,23,26:2
10Usefulness of Magnifying Endoscopy with Narrow-Band Imaging for Determining Tumor Invasion Depth in Early Gastric Cancer显示文摘Daisuke Kikuchi Toshiro Iizuka Shu Hoteya Akihiro Yamada Tsukasa Furuhata Satoshi Yamashita Kaoru Domon Masanori Nakamura Akira Matsui Toshifumi Mitani Osamu Ogawa Sumio Watanabe Mitsuru Kaise Guido Schumacher 2013Gastroenterology Research and Practice2013,,:2
11Sulfonylurea and glinide reduce insulin content, functional expression of K ATP channels, and accelerate apoptotic β-cell death in the chronic phase显示文摘Akira Takahashi Kazuaki Nagashima Akihiro Hamasaki Naomitsu Kuwamura Yukiko Kawasaki Hiroki Ikeda Yuichiro Yamada Nobuya Inagaki Yutaka Seino 2007Diabetes Research and Clinical Practice2007,,3:2
12Helicobacter pylori eradication therapy for the remnant stomach after gastrectomy显示文摘Norio Matsukura Takashi Tajiri Shunji Kato Akiyoshi Togashi Gotaro Masuda Itsuo Fujita Akira Tokunaga Nobutaka Yamada 2003Gastric Cancer2003,,2:2
13Endoscopic submucosal dissection for nonampullary large superficial adenocarcinoma/adenoma of the duodenum: feasibility and long-term outcomes显示文摘Shu Hoteya Naohisa Yahagi Toshiro Iizuka Daisuke Kikuchi Toshifumi Mitani Akira Matsui Osamu Ogawa Satoshi Yamashita Tsukasa Furuhata Akihiro Yamada Ryusuke Kimura Kosuke Nomura Yasutaka Kuribayashi Mitsuru Kaise 2013EIO2013,,01:2
14Kyoto classification in patients who developed multiple gastric carcinomas after Helicobacter pylori eradication显示文摘BACKGROUND Endoscopic Kyoto classification predicts gastric cancer risk;however,the score in the patients with primary gastric cancer after Helicobacter pylori(H.pylori)eradication therapy is unknown.AIM To elucidate the Kyoto classification score in patients with both single gastric cancer and multiple gastric cancers developed after H.pylori eradication.METHODS The endoscopist recorded the Kyoto classification at the endoscope and the Kyoto classification score at the time of the first diagnosis of gastric cancer after H.pylori eradication.The score was compared between single gastric cancer group and multiple gastric cancers group.RESULTS The Kyoto score at the time of diagnosis of 45 cases of gastric cancer after H.pylori eradication was 4.0 points in average.The score was 3.8 points in the single gastric cancer group,and 5.1 points in the multiple gastric cancers group.The multiple group had a significantly higher score than the single group(P=0.016).In the multiple gastric cancers group,all the patients(7/7)had 5 or higher Kyoto score,while in single gastric cancer group,the proportion of patients with a score of 5 or higher was less than half,or 44.7%(17/38).CONCLUSION Patients diagnosed with gastric cancer after H.pylori eradication tended to have advanced gastritis.In particular,in cases of multiple gastric cancers developed after H.pylori eradication,the endoscopic Kyoto classification score tended to be 5 or higher in patients with an open type atrophic gastritis and the intestinal metaplasia extended to the corpus.Kosuke Sakitani Toshihiro Nishizawa Akira Toyoshima Shuntaro Yoshida Tatsuya Matsuno Tomoharu Yamada Masatoshi Irokawa Yoshiyuki Takahashi Yousuke Nakai Osamu Toyoshima Kazuhiko Koike 2020World Journal of Gastrointestinal Endoscopy2020,12,9:2
15Curcumin Maintenance Therapy for Ulcerative Colitis: Randomized, Multicenter, Double-Blind, Placebo-Controlled Trial显示文摘Hiroyuki Hanai Takayuki Iida Ken Takeuchi Fumitoshi Watanabe Yasuhiko Maruyama Akira Andoh Tomoyuki Tsujikawa Yosihihide Fujiyama Keiichi Mitsuyama Michio Sata Masami Yamada Yasushi Iwaoka Kazunari Kanke Hideyuki Hiraishi Kazuhisa Hirayama Hajime Arai Shi 2006Clinical Gastroenterology and Hepatology2006,,12:2
16Delayed bleeding after endoscopic submucosal dissection for non‐ampullary superficial duodenal neoplasias might be prevented by prophylactic endoscopic closure: Analysis of risk factors显示文摘Shu Hoteya Mitsuru Kaise Toshiro Iizuka Osamu Ogawa Toshifumi Mitani Akira Matsui Daisuke Kikuchi Tsukasa Furuhata Satoshi Yamashita Akihiro Yamada Ryusuke Kimura Kousuke Nomura Yasutaka Kuribayashi Yoshifumi Miyata Naohisa Yahagi 2015Digestive Endoscopy2015,,3:2
17Randomized clinical trial of an ethanol extract of Ganoderma lucidum in men with lower urinary tract symptoms显示文摘瞄准:评估 Ganoderma 的一篇摘录的安全和功效易懂嗯那出现最强壮 5 α-reductase 在由一个双窗帘的 19 朵可食、药用的蘑菇的摘录之中的禁止的活动,控制安慰剂,使随机化并且在有更低的尿道症状(LUTS ) 的人的变化剂量的学习。方法:在这试用,我们随机分配了与 G 有 slight-to-moderate LUTS 到 12 星期处理的超过 49 年岁的 88 个人。易懂嗯摘录(6 mg 一次一天) 或安慰剂。主要结果措施是在国际前列腺症状分数(IPSS ) 和 uroflowmetry 的变量的变化。第二等的结果措施在前列腺尺寸包括了变化,剩余在 voiding,实验室价值和报导不利效果以后的尿体积。结果: G。易懂嗯对为改进全部的 IPSS, 2.1 个点在处理的目的减少的安慰剂有效、显著地优异(吝啬的差别, −1.18 点;95% 信心间隔, −1.74 到 −0.62;P < 0.0001 ) 。没有变化关于生活分数的质量被观察,山峰尿流动,吝啬的尿流动,剩余尿,前列腺体积,浆液前列腺特定的抗原或睾丸激素层次。全面处理很好没有严重不利效果被容忍。结论:G 的摘录。易懂嗯很好被容忍并且改进了 IPSS 分数。这些结果用 G 的摘录为长持续时间鼓励了植物治疗法的进一步的、大规模评估。易懂嗯在有 LUTS 的人上。Masanori Noguchi Tatsuyuki Kakuma Katsuro Tomiyasu Akira Yamada Kyogo Itoh Fumiko Konishi Shoichiro Kumamoto Kuniyoshi Shimizu Ryuichiro Kondo Kei Matsuoka 2008Asian Journal of Andrology2008,10,5:2
18Long-term effect of lamivudine treatment on the incidence of hepatocellular carcinoma in patients with hepatitis B virus infection显示文摘Mika Kurokawa Naoki Hiramatsu Tsugiko Oze Takayuki Yakushijin Masanori Miyazaki Atsushi Hosui Takuya Miyagi Yuichi Yoshida Hisashi Ishida Tomohide Tatsumi Shinichi Kiso Tatsuya Kanto Akinori Kasahara Sadaharu Iio Yoshinori Doi Akira Yamada Masahide Oshita 2012Journal of Gastroenterology2012,,5:1
19G-Protein-Coupled Receptor GPR49 is Up-regulated in Basal Cell Carcinoma and Promotes Cell Proliferation and Tumor Formation显示文摘Keiji Tanese Mariko Fukuma Taketo Yamada Taisuke Mori Tsutomu Yoshikawa Wakako Watanabe Akira Ishiko Masayuki Amagai Takeji Nishikawa Michiie Sakamoto 2008The American Journal of Pathology2008,,:1
20IGF and myostatin pathways are respectively induced during the earlier and the later stages of skeletal muscle hypertrophy induced by clenbuterol, a β <sub>2</sub>‐adrenergic agonist显示文摘Tokuhisa Abo Ryo‐hei Iida Syuhei Kaneko Takeo Suga Hiroyuki Yamada Yoshiki Hamada Akira Yamane 2012Cell Biochem Funct2012,,8:1
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