Search results for: Tomoya Ogawa

Items from 1 to 20 out of 71 results

article

Competence development of trainees performing short‐type single‐balloon enteroscopy‐assisted endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy

Yuki Tanisaka, Masafumi Mizuide, Akashi Fujita, Ryuhei Jinushi, more

Journal of Hepato‐Biliary‐Pancreatic Sciences > 29 > 12 > 1316 - 1326

Objectives This study aimed to evaluate the trainees’ practice and learning curve in short‐type single‐balloon enteroscopy (short SBE)‐assisted endoscopic retrograde cholangiopancreatography (ERCP) for patients with surgically altered anatomy (SAA) and determine how to train these trainees. Methods The data of short SBE‐assisted ERCP procedures between September 2011 and June 2021 were analyzed...

article

Can the laser‐cut covered self‐expandable metallic stent be the first choice for patients with unresectable distal malignant biliary obstruction? (with video)

Yuki Tanisaka, Masafumi Mizuide, Akashi Fujita, Tomoya Ogawa, more

Journal of Hepato‐Biliary‐Pancreatic Sciences > 29 > 5 > 585 - 593

Objectives To evaluate whether laser‐cut covered self‐expandable metallic stents (LC‐CSEMSs) can be the first choice for patients with unresectable distal malignant biliary obstruction (DMBO). Methods Patients with unresectable DMBO who received LC‐CSEMS (September 2014‐December 2020) or braided CSEMS (B‐CSEMS) (July 2013‐December 2020) placement for biliary drainage were enrolled. Outcomes, including...

article

Status of single‐balloon enteroscopy‐assisted endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy: Systematic review and meta‐analysis on biliary interventions

Yuki Tanisaka, Shomei Ryozawa, Masafumi Mizuide, Ryuichiro Araki, more

Digestive Endoscopy > 33 > 7 > 1034 - 1044

Background and Aims Endoscopic retrograde cholangiopancreatography (ERCP) in patients with surgically altered anatomy is still challenging. Usefulness of single‐balloon enteroscopy (SBE)‐assisted ERCP has been increasingly reported. Short SBE is considered beneficial with a 152‐cm working length and a 3.2‐mm working channel. This has increased the variety of devices that can be used during ERCP procedures...

article

Comparison between tools for measuring breathlessness: Cross‐sectional validation of the Japanese version of the Dyspnoea‐12

Koichi Nishimura, Toru Oga, Kazuhito Nakayasu, Hiroyuki Taniguchi, more

The Clinical Respiratory Journal > 15 > 11 > 1201 - 1209

Introduction The Dyspnoea‐12 (D‐12) is a brief, easy to complete questionnaire for measuring breathlessness. Objectives To facilitate further efforts to measure dyspnoea in real clinical settings, the authors aimed to develop and validate a Japanese version of the D‐12 and also compare the D‐12 with the Baseline Dyspnea Index (BDI) and the Activity component of the St. George's Respiratory Questionnaire...

article

Cystic duct stone removal using a biliary dilation balloon catheter in a patient who underwent total gastrectomy

Tomoya Ogawa, Shomei Ryozawa, Yuki Tanisaka

Digestive Endoscopy > 33 > 5 > e89 - e90

article

Novel retrieval basket facilitates the extraction of difficult bile duct stones in a patient with surgically altered anatomy

Yuki Tanisaka, Masafumi Mizuide, Akashi Fujita, Tomoya Ogawa, more

Journal of Hepato‐Biliary‐Pancreatic Sciences > 28 > 5 > e17 - e18

Highlight Bile duct stone extraction is sometimes difficult in patients with surgically altered anatomy. Tanisaka and colleagues present a video case report demonstrating the usefulness of a novel retrieval basket with a unique helical shape, which facilitates the extraction of difficult bile duct stones, even in patients with surgically altered anatomy.

article

Usefulness of self‐expandable metal stents for malignant biliary obstruction using a short‐type single‐balloon enteroscope in patients with surgically altered anatomy

Yuki Tanisaka, Shomei Ryozawa, Masafumi Mizuide, Akashi Fujita, more

Journal of Hepato‐Biliary‐Pancreatic Sciences > 28 > 3 > 272 - 279

Objectives To evaluate the efficacy and safety of self‐expandable metal stent (SEMS) placement for unresectable malignant biliary obstruction (MBO) using a short‐type single‐balloon enteroscopy (short SBE) in patients with surgically altered anatomy (SAA). Methods The technical success rate, clinical success rate, recurrent biliary obstruction (RBO), time to RBO (TRBO), procedure related adverse...

article

Supplemental oxygen improves exercise capacity in IPF patients with exertional desaturation

Shinichi Arizono, Taiki Furukawa, Hiroyuki Taniguchi, Koji Sakamoto, more

Respirology > 25 > 11 > 1152 - 1159

Background and objective The efficacy of supplemental oxygen during exercise remains unclear for patients with IPF, as there have been conflicting results from recent prospective studies with small sample sizes. Methods This prospective, single‐blind, randomized, crossover trial evaluated the efficacy of supplemental oxygen compared with placebo air during exercise in consecutive patients with...

article

Analysis of the factors involved in procedural failure: Endoscopic retrograde cholangiopancreatography using a short‐type single‐balloon enteroscope for patients with surgically altered gastrointestinal anatomy

Yuki Tanisaka, Shomei Ryozawa, Masafumi Mizuide, Maiko Harada, more

Digestive Endoscopy > 31 > 6 > 682 - 689

Aim To analyze factors involved in procedural failure and to discuss responses to procedural failure by using the outcomes of endoscopic retrograde cholangiopancreatography (ERCP) carried out using a short‐type single‐balloon enteroscope (short SBE) in patients with surgically altered gastrointestinal anatomy. Methods The study sample included patients who underwent ERCP‐related procedures using...

article

AC Loss Distribution in Two-Layer HTS Cable

Jun Ogawa, Satoshi Fukui, Tetsuo Oka, Tomoya Ogawa, more

IEEE Transactions on Applied Superconductivity > 2018 > 28 > 3 > 1 - 4

We measured the influence of the twist pitch, twist direction, and transport current balance of the inner and outer layers on the ac loss characteristics in a two-layer twisted high temperature superconducting (HTS) cable. To measure the ac loss in each layer, we placed the thermo-couples on each tape face with thermal insulation. In the HTS cable, the inner layer is exposed to a longitudinal magnetic...

chapter

Performance of Adaptive Mesh Refinement Scheme for Hydrodynamics on Simulations of Expanding Supernova Envelope

Ayato Noro, Tomoya Ogawa, Takuma Ohta, Kazuyuki Yamashita, more

Lecture Notes in Computer Science > High Performance Computing > HPC Systems > 207-218

We present results of performance measurement of our astrophysical fluid dynamics code with Adaptive Mesh Refinement (AMR) scheme. As an example of its application for astrophysical phenomena, we show the results of 3D simulation of Rayleigh-Taylor instability in expanding supernova envelope and the possibility of reconciliation of the present model with observations. The efficiency of memory and...

chapter

Performance of Vector/Parallel Orientated Hydrodynamic Code

Shigeki Miyaji, Ayato Noro, Tomoya Ogawa, Mitue Den, more

Lecture Notes in Computational Science and Engineering > Adaptive Mesh Refinement - Theory and Applications > Software > 379-390

Summary We have developed a hydrodynamic 3 dimensional AMR code which is suitable for vectorization and parallelization based on Fully Threaded Tree method. For the case of 3D FTT-AMR simulation, the number of higher resolution cells is eight times of that of mother low resolution cells. Therefore if the region where the highest resolution is required has certain volume, it is better to use single...

chapter

Similarity of Documents Using Reconfiguration of Thesaurus

Tomoya Ogawa, Nobuhiro Inuzuka

Lecture Notes in Computer Science > Knowledge-Based Intelligent Information and Engineering Systems > Knowledge-Based Interface Systems > 95-102

We study a method to give similarity among documents for search. This paper aims to give a method for documents in special fields, such as academic or professional areas. A common method treats a document as a vectors of frequency of words in it and a similarity is given in the vector space. In this case the large dimension is a problem.Using semantic category and/or singular value decomposition are...

article

40-nm Embedded Split-Gate MONOS (SG-MONOS) Flash Macros for Automotive With 160-MHz Random Access for Code and Endurance Over 10 M Cycles for Data at the Junction Temperature of 170 $^{\circ}$ C

Takashi Kono, Takashi Ito, Tamaki Tsuruda, Takayuki Nishiyama, more

IEEE Journal of Solid-State Circuits > 2014 > 49 > 1 > 154 - 166

First-ever 40-nm embedded split-gate MONOS (SG-MONOS) flash macros for automotive micro-controller unit (MCU) have been successfully developed. A SG-MONOS cell realizes high performance with low power consumption and intrinsically high data reliability thanks to the combination of split-gate and charge-trapping structure. In addition, newly developed circuit techniques greatly enhance the advantages...

article

Quadriceps weakness contributes to exercise capacity in nonspecific interstitial pneumonia

Fumiko Watanabe, Hiroyuki Taniguchi, Koji Sakamoto, Yasuhiro Kondoh, more

Respiratory Medicine > 2013 > 107 > 4 > 622-628

It has been shown that peripheral muscle dysfunction is a critical factor in determining exercise intolerance in patients with several chronic lung diseases, including idiopathic pulmonary fibrosis. We hypothesized that exercise capacity would be, at least in part, determined by peripheral muscle dysfunction in patients with fibrotic nonspecific interstitial pneumonia (f-NSIP), another major subtype...

chapter

40nm embedded SG-MONOS flash macros for automotive with 160MHz random access for code and endurance over 10M cycles for data

Takashi Kono, Takashi Ito, Tamaki Tsuruda, Takayuki Nishiyama, more

2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers > 212 - 213

2013 IEEE International Solid-State Circuits Conference - (ISSCC)

The markets of Flash MCUs, microcontrollers with embedded flash memory (eFlash), have been steadily growing since the middle of 1990s. Especially, in automotive, Flash MCUs have become essential to realize the complicated real-time controls for higher fuel-efficiency, higher safety, and more connectivity. For this reason, high-density and high-speed random-read access are strongly required for eFlash...

article

Dihydropyrene annelated with dihydrothieno[3.4-b]pyrazine: synthesis and photoswitching property

Tsuyoshi Sawada, Mizue Kuroki, Tomoya Ogawa, Kentaro Shimojo, more

Tetrahedron Letters > 2010 > 51 > 31 > 4033-4036

In this study, 9,10-diacetoxyl-2,7-di-tert-butyl-trans-10b,10c-dimethyl-10b,10c-dihydropyrene annelated with a dihydrothieno[3.4-b]pyrazine unit (1a) was prepared, for the first time, from 5,13-di-tert-butyl-8,16-dimethyl-1,2,9,10-tetrahydroxy[2.2]metacyclophane and 3,4-diaminothiophene in two steps. The photoisomerization property of 1 was investigated by UV and ¹ H NMR spectroscopies, and...

article

Two dimensional imaging of radiation accidents and radioactive contamination

Tomoya Ogawa, Nobuhiko Sarukura, Masahito Watanabe, Tsuguo Fukuda, more

Optical Materials > 2010 > 32 > 7 > 753-755

An accident in a nuclear power plant caused by an unpredictable event such as an explosion, fire and earthquake is so serious that we have to carefully and precisely detect any radiation leakage from the plants, given that the number of nuclear power plants is recently increasing in order to cope with the contamination of air due to carbon dioxide emission from conventional power plants.Invisible...

article

Dyspnoea at 6-min walk test in idiopathic pulmonary fibrosis: Comparison with COPD

Osamu Nishiyama, Hiroyuki Taniguchi, Yasuhiro Kondoh, Tomoki Kimura, more

Respiratory Medicine > 2007 > 101 > 4 > 833-838

The characteristics of dyspnoea in idiopathic pulmonary fibrosis (IPF) during a 6-min walk test are not clear. This study was designed to evaluate dyspnoea and desaturation during the 6-min walk test in IPF in comparison with that in chronic obstructive pulmonary disease (COPD), which is one of the most studied chronic lung diseases.The 41 consecutive patients with IPF included in this study were...

article

Preface

Minhua Jiang, Tomoya Ogawa

Journal of Crystal Growth > 2006 > 292 > 2 > 165

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INFONA - science communication portal

Search results for: Tomoya Ogawa

Competence development of trainees performing short‐type single‐balloon enteroscopy‐assisted endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy

Can the laser‐cut covered self‐expandable metallic stent be the first choice for patients with unresectable distal malignant biliary obstruction? (with video)

Status of single‐balloon enteroscopy‐assisted endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy: Systematic review and meta‐analysis on biliary interventions

Comparison between tools for measuring breathlessness: Cross‐sectional validation of the Japanese version of the Dyspnoea‐12

Cystic duct stone removal using a biliary dilation balloon catheter in a patient who underwent total gastrectomy

Novel retrieval basket facilitates the extraction of difficult bile duct stones in a patient with surgically altered anatomy

Usefulness of self‐expandable metal stents for malignant biliary obstruction using a short‐type single‐balloon enteroscope in patients with surgically altered anatomy

Supplemental oxygen improves exercise capacity in IPF patients with exertional desaturation

Analysis of the factors involved in procedural failure: Endoscopic retrograde cholangiopancreatography using a short‐type single‐balloon enteroscope for patients with surgically altered gastrointestinal anatomy

AC Loss Distribution in Two-Layer HTS Cable

Performance of Adaptive Mesh Refinement Scheme for Hydrodynamics on Simulations of Expanding Supernova Envelope

Performance of Vector/Parallel Orientated Hydrodynamic Code

Similarity of Documents Using Reconfiguration of Thesaurus

40-nm Embedded Split-Gate MONOS (SG-MONOS) Flash Macros for Automotive With 160-MHz Random Access for Code and Endurance Over 10 M Cycles for Data at the Junction Temperature of 170 $^{\circ}$ C

Quadriceps weakness contributes to exercise capacity in nonspecific interstitial pneumonia

40nm embedded SG-MONOS flash macros for automotive with 160MHz random access for code and endurance over 10M cycles for data

Dihydropyrene annelated with dihydrothieno[3.4-b]pyrazine: synthesis and photoswitching property

Two dimensional imaging of radiation accidents and radioactive contamination

Dyspnoea at 6-min walk test in idiopathic pulmonary fibrosis: Comparison with COPD

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