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| 1 | Risk factors for bleeding after endoscopic submucosal dissection for gastric lesions显示文摘AIM:To assess risk factors for bleeding after gastric endoscopic submucosal dissection(ESD) and to develop preventive measures.METHODS:This retrospective study was performed in a tertiary referral center.A total of 328 patients underwent ESD for 398 gastric neoplasms between July 2007 and June 2009.The main outcome was association between post-ESD bleeding and the following:age;sex;comorbidities;daily use of medicine potentially related to gastric injury/bleeding;location,size,and histological depth of lesions;ulceration;experience of operator coagulating the ulcer floor,and duration of operation.We also determined the relationship between the location of post-ESD bleeding and risk factors for hemorrhage.RESULTS:Univariate analysis revealed significant risk factors:tumor location [odds ratio(OR),2.86;95% CI:1.21-6.79,P=0.024],coagulator experience(OR,4.29;95% CI:1.43-12.86,P=0.009),and medicine potentially related to gastric injury/bleeding(OR,2.80;95% CI:1.14-6.90,P=0.039).Multivariate logistic regression analysis confirmed significant,independent risk factors:tumor in lower third of stomach(OR,2.47;95% CI:1.02-5.96,P=0.044),beginner coagulator(OR,3.93;95% CI:1.29-11.9,P=0.016),and medicine(OR,2.76;95% CI:1.09-6.98,P=0.032).We classif ied cases of post-ESD bleeding into two groups(bleeding at the ulcer margin vs bleeding at the center) and found that bleeding at the margin occurred more frequently with beginner coagulators compared with experts(OR,16.00;95% CI:1.22-210.59,P=0.040).CONCLUSION:Beginner coagulators,tumor in the antrum,and medicines were significant risk factors for post-ESD bleeding.Bleeding at the ulcer margin frequently occurred with beginner operators. | Yosuke Tsuji Ken Ohata Takafumi Ito Hideyuki Chiba Tomohiko Ohya Toshiaki Gunji Nobuyuki Matsuhashi | 2010 | World Journal of Gastroenterology2010，16，23： | 60 |
| 2 | 青藏高原唐古拉山口冰川、水文和气候学观测20a:意义与贡献显示文摘1989年中日联合青藏高原冰川考察在唐古拉山口开始进行冰川、水文气候学观测,距今已经整整20 a.时过境迁,合作双方的研究所均已重组、更名,然而1989-1993年间考察研究所起到的开创性作用、当时取得成果至今仍具有重要科学意义.而且当时建立的一些观测站点,借助一些大型课题,如GAME/Tibet、国家自然科学基金重点项目和国家重点基础研究发展计划(973计划)项目的支持一直持续工作至今.最近,完善了位于冬克玛底冰川末端的冰川监测系统,将对该地区的冰冻圈和气候环境变化研究做出更多的贡献. | 姚檀栋 张寅生 蒲健辰 田立德 Yutaka Ageta Tetsuo Ohata | 2010 | 冰川冻土2010，32，6： | 14 |
| 3 | Novel risk markers for gastric cancer screening: Present status and future prospects显示文摘Initial identification of populations at high risk of gastric cancer (GC) is important for endoscopic screening of GC. As serum pepsinogen (PG) test-positive subjects with progression of chronic atrophic gastritis (CAG) show a high likelihood of future cancer development, this population warrants careful follow-up observation as a high-risk GC group. By combining the PG test with Helicobacter pylori (HP) antibody titers, the HP-related chronic gastritis stage can be classified, thus identifying not only a GC high-risk group but also a low-risk group. Among PG test-negative patients without CAG, those with high serum PG Ⅱ levels and HP antibody titers are thought to have severe gastric mucosal inflammation and the risk of diffuse-type GC is also high. Meanwhile, in gastric mucosae obtained by endoscopic biopsy, HP infection induces aberrant DNA methylation in CpG islands in multiple gene regions and the extent of methylation clearly correlates with GC risk. By quantifying aberrant DNA methylation in suitable gene markers, we can determine the extent of the epigenetic field for cancerization. These novel concepts and risk markers will have many clinical applications in gastrointestinal endoscopy, including more efficient endoscopic GC screening and a strategic approach to metachronous multiple GCs after endoscopic treatment. | Shotaro Enomoto Takao Maekita Hiroshi Ohata Kimihiko Yanaoka Masashi Oka Masao Ichinose | 2010 | World Journal of Gastrointestinal Endoscopy2010，2，12： | 10 |
| 4 | Prospective controlled study on the effects of polyethylene glycol in capsule endoscopy显示文摘AIM:To prospectively confirm whether a small amount of polyethylene glycol(PEG)ingested after swallowing endoscopy capsule improves image quality and completion rate.METHODS:Forty-four consecutive patients referred to us for capsule endoscopy(CE)were randomized to two groups.All patients were restricted to clear fluids for 12 h before the examination.Patients in group A(22 cases)received no additional preparation,while those in group B(20 cases)ingested 500 mL of PEG within a 2 h period starting 30 min after swallowing the capsule.Clear fluids and meals were allowed 2 h and 4 h after capsule ingestion,respectively.Image quality was assessed as the percentage of visualized bowel surface area as follows:1:<25%;2:25%-49%;3:50%-74%;4:75%-89%;5:>90%.The small bowel record was divided into five segments by time,and the score for each segment was evaluated.All CE examinations were performed with the Pillcam SB capsule endoscopy sys-tem(Given Imaging Co.Ltd.,Yoqnem).RESULTS:This study ended in December 2009,because sample size was considered large enough.A total of 44 patients were enrolled.Two patients in group B were excluded from the analysis because small bowel images could not be obtained from these patients;one had a full stomach,while the other presented with a massive gastric bleed.Thus,22 patients from group A and 20 patients from group B completed the study.There was no significant difference in age(P=0.22),sex(P=0.31),and indication for CE.No significant adverse events occurred in any of the study patients.In group A,image quality deteriorated as the capsule progressed distally.However,in group B,image quality was maintained to the distal small bowel.In each of the five segments,the visibility score was significantly higher in group B than in group A(segment 1:4.3± 0.7vs 4.7±0.5,P=0.03;segment 2:4.2±0.9vs 4.8 ±0.4,P=0.01;segment 3:4.0±1.0 vs 4.6±0.7,P =0.04;segment 4:3.6±1.1 vs 4.5±0.6,P=0.003;segment 5:2.7±1.0vs 4.4±0.8,P=0.00004).Thus,the use of PEG during CE examination significantly improved image quality in all time segments,and this effect was more pronounced in the distal ileum.The completion rate to the cecum was not significantly different between groups A and B(81.8%vs 85.0%,P =0.89).There was no difference in the gastric transit time between groups(36.2±35.0 min vs 54.0±56.6 min,P=0.23),but the small bowel transit time was significantly longer in group A than in group B(246.0± 107.0 minvs 171.0±104.0 min,P=0.04).CONCLUSION:The ingestion of a small amount of PEG after the swallowing of an endoscopy capsule significantly improved CE image quality,but did not enhance the completion rate to the cecum. | Takafumi Ito Ken Ohata Akiko Ono Hideyuki Chiba Yosuke Tsuji Hajime Sato Nobuyuki Matsuhashi | 2012 | World Journal of Gastroenterology2012，18，15： | 7 |
| 5 | A prospective randomized trial of lafutidine vs rabeprazole on post-ESD gastric ulcers显示文摘AIM:To compare the effects of rabeprazole and lafutidine on post-endoscopic submucosal dissection(ESD) gastric ulcers.METHODS:Patients with gastric tumors indicated for ESD were prospectively studied.After ESD,all patients were treated with intravenous omeprazole for the first 3 d.Patients were then randomly assigned to oral lafutidine or rabeprazole.Ulcer size,ulcer size reduction rate,and ulcer stage were evaluated 4 wk later.Occurrence of complication was monitored throughout the 4-wk period.RESULTS:Sixty five patients were enrolled in the study,and 60 patients were subjected to the final analysis.In the lafutidine group(30 lesions in 29 patients),initial and 4-wk post-ESD ulcer sizes were 33.3 ± 9.2 and 10.5 ± 4.8 mm,respectively.In the rabeprazole group(34 lesions in 31 patients),the values were 34.7 ± 11.3 and 11.8 ± 6.7 mm,respectively.Ulcer size reduction rates in lafutidine and rabeprazole groups were 32.3% and 33.5%,respectively(P=0.974).Ulcer stage 4 wk post-ESD did not differ significantly between the two groups(P=0.868).Two cases in the rabeprazole group and no cases in the lafutidine group developed ulcer bleeding during the oral dose period,although the difference of bleeding rate between the two groups was not statistically significant(P=0.157).CONCLUSION:Lafutidine and rabeprazole have equivalent therapeutic effects on post-ESD gastric ulcers. | Tomohiko Richard Ohya Hiroki Endo Kei Kawagoe Tatsuro Yanagawa Katsuhiro Hanawa Ken Ohata Masako Asayama Kantaro Hisatomi Takuma Teratani Toshiaki Gunji Hajime Sato Nobuyuki Matsuhashi | 2010 | World Journal of Gastrointestinal Endoscopy2010，2，1： | 7 |
| 6 | Diagnosis and therapeutic strategies for small bowel vascular lesions显示文摘Small bowel vascular lesions, including angioectasia (AE), Dieulafoy’s lesion (DL) and arteriovenous malformation (AVM), are the most common causes of obscure gastrointestinal bleeding. Since AE are considered to be venous lesions, they usually manifest as a chronic, well-compensated condition. Subsequent to video capsule endoscopy, deep enteroscopy can be applied to control active bleeding or to improve anemia necessitating blood transfusion. Despite the initial treatment efficacy of argon plasma coagulation (APC), many patients experience re-bleeding, probably because of recurrent or missed AEs. Pharmacological treatments can be considered for patients who have not responded well to other types of treatment or in whom endoscopy is contraindicated. Meanwhile, a conservative approach with iron supplementation remains an option for patients with mild anemia. DL and AVM are considered to be arterial lesions;therefore, these lesions frequently cause acute life-threatening hemorrhage. Mechanical hemostasis using endoclips is recommended to treat DLs, considering the high re-bleeding rate after primary APC cauterization. Meanwhile, most small bowel AVMs are large and susceptible to re-bleeding therefore, they usually require surgical resection. To achieve optimal diagnostic and therapeutic approaches for each type of small bowel lesion, the differences in their epidemiology, pathology and clinical presentation must be understood. | Eiji Sakai Ken Ohata Atsushi Nakajima Nobuyuki Matsuhashi | 2019 | World Journal of Gastroenterology2019，25，22： | 5 |
| 7 | Automatic Detection of COVID-19 Infection Using Chest X-Ray Images Through Transfer Learning显示文摘The new coronavirus(COVID-19),declared by the World Health Organization as a pandemic,has infected more than 1 million people and killed more than 50 thousand.An infection caused by COVID-19 can develop into pneumonia,which can be detected by a chest X-ray exam and should be treated appropriately.In this work,we propose an automatic detection method for COVID-19 infection based on chest X-ray images.The datasets constructed for this study are composed of194 X-ray images of patients diagnosed with coronavirus and 194 X-ray images of healthy patients.Since few images of patients with COVID-19 are publicly available,we apply the concept of transfer learning for this task.We use different architectures of convolutional neural networks(CNNs)trained on Image Net,and adapt them to behave as feature extractors for the X-ray images.Then,the CNNs are combined with consolidated machine learning methods,such as k-Nearest Neighbor,Bayes,Random Forest,multilayer perceptron(MLP),and support vector machine(SVM).The results show that,for one of the datasets,the extractor-classifier pair with the best performance is the Mobile Net architecture with the SVM classifier using a linear kernel,which achieves an accuracy and an F1-score of 98.5%.For the other dataset,the best pair is Dense Net201 with MLP,achieving an accuracy and an F1-score of 95.6%.Thus,the proposed approach demonstrates efficiency in detecting COVID-19 in X-ray images. | Elene Firmeza Ohata Gabriel Maia Bezerra João Victor Souza das Chagas Aloísio Vieira Lira Neto Adriano Bessa Albuquerque Victor Hugo Cde Albuquerque Pedro Pedrosa Rebouças Filho | 2021 | IEEE/CAA Journal of Automatica Sinica2021，8，1： | 3 |
| 8 | Hydrological and climatological glaciers observation 20 years on Tanggula Pass of Tibetan Plateau: its significance and contribution显示文摘Two decades have passed since China and Japan jointly launched hydrological & climatological observations on the glaciers in Tanggula Pass, Tibetan Plateau. Although the research institutions involved have been either restructured or renamed, their work, between 1989 and 1993, was ground-breaking and remains significant even to this day. Some observation sites established at that time are still utilized for large-scaled projects sponsored by GAME/Tibet, NSFC (Natural Science Foundation of China) and the Major State Basic Research Development Program of China (973 Program). Recently, a glacier monitoring system has been es- tablished on the cap of Dongkemadi Glacier, and is expected to make further contributions to research on the change of the cryospheric and climatic environment in the area. | TanDong Yao YinSheng Zhang JianChen Pu LiDe Tian Yutaka Ageta T. Ohata | 2011 | Research in Cold and Arid Regions2011，3，3： | 3 |
| 9 | Endoscopic tissue shielding method with polyglycolic acid sheets and fibrin glue to cover wounds after colorectal endoscopic submucosal dissection (with video)显示文摘 | Yosuke Tsuji Ken Ohata Toshiaki Gunji Meiko Shozushima Jun Hamanaka Akiko Ohno Takafumi Ito Nobutake Yamamichi Mitsuhiro Fujishiro Nobuyuki Matsuhashi Kazuhiko Koike | 2014 | Gastrointestinal Endoscopy2014，，1： | 2 |
| 10 | A Multicenter Survey of the Management After Gastric Endoscopic Submucosal Dissection Related to Postoperative Bleeding显示文摘 | Osamu Goto Mitsuhiro Fujishiro Ichiro Oda Naomi Kakushima Yorimasa Yamamoto Yosuke Tsuji Ken Ohata Takashi Fujiwara Junko Fujiwara Naoki Ishii Chizu Yokoi Shinichi Miyamoto Toshiyuki Itoh Shinji Morishita Takuji Gotoda Kazuhiko Koike | 2012 | Digestive Diseases and Sciences2012，，2： | 2 |
| 11 | Magnifying endoscopy with narrow-band imaging helps determine the management of gastric adenomas显示文摘 | Yosuke Tsuji Ken Ohata Masau Sekiguchi Akiko Ohno Takafumi Ito Hideyuki Chiba Toshiaki Gunji Jun-ichi Fukushima Nobutake Yamamichi Mitsuhiro Fujishiro Nobuyuki Matsuhashi Kazuhiko Koike | 2012 | Gastric Cancer2012，，4： | 2 |
| 12 | Optimal dosage regimen of meropenem for pediatric patients based on pharmacokinetic/pharmacodynamic considerations显示文摘 | Ohata Y Tomita Y Nakayama M | | 0，，05： | 1 |
| 13 | Carcinosarcoma of the liver : report of a case 显示文摘 | Yamamoto T Kurashima Y Ohata K | 2014 | Surgery Today2014，44，11： | 1 |
| 14 | Com bined resection If the pancreas a portal vein for pancreatic cancer显示文摘 | Takahashi S Ohata Y | 1994 | Br J Surg1994，81，6： | 1 |
| 15 | Efficacy of induced hypotension in the surgical treatment of large cavernous sinus cavernomas显示文摘 | Ohata K Takami T El-Naggar A | 1999 | J Neurosurg1999，90，： | 1 |
| 16 | Hydroxyapatite laminar spacers and titanium mini plates in cervical laminop lasty显示文摘 | CkJto T Ohata K Takami T | 2002 | J Neur os- urg2002，97，： | 1 |
| 17 | Potential mesenchymal stem cell therapy for skin diseases 显示文摘 | Li X Hamada T Ohata C | 2013 | Exp Dermatol2013，22，8： | 1 |
| 18 | Heme induces DNA damage and hyperproliferation of colonic epithelial cells via hydrogen peroxide produced by heme oxygenase:a possible mechanism of heme - induced colon cancer 显示文摘 | Ishikawa S Tamaki S Ohata M | 2010 | Mol Nutr Food Res2010，54，8： | 1 |
| 19 | Effect of rhythmic auditory stimulation on gait parameters and gait emg in patients with hemiplegia after stroke显示文摘 | Yu H Ohata K Kitatani R | 2014 | Gait&Posture2014，1，39： | 1 |
| 20 | Wind Farms Linked by SMES Systems显示文摘 | Shinichi Nomura Yoshihiro Ohata Takushi Hagita | 2005 | IEEE Transactions on Applied Superconductivity2005，15，2： | 1 |
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