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The optimal stent pusher position to achieve successful ureteral stent insertion under fluoroscopic guidance

Asian Journal of Urology 2024年第2期11卷 311-315页

作者： Makoto Taguchi Kaneki Yasuda hidefumi kinoshita Department of Urology Osaka Saiseikai Izuo Hospital Based on Social Welfare Organization“Saiseikai”Imperial Gift Foundation Inc.OsakaJapan Department of Urology and Andrology Kansai Medical UniversityHirakataOsakaJapan

Objective: To examine factors to predict the optimal stent pusher position when inserting ureteral stents under ***: We retrospectively reviewed 327 patients who underwent ureteral stent insertion. We considered the pubic bone as a useful anatomical landmark to insert ureteral stents under fluoroscopic guidance. Thus, we categorized patients into three groups (proximal, middle, and distal groups) according to the position of the radiopaque tip of the push catheter when inserting the ureteral stent. Success was defined as a completely curled ureteral stent tail. We compared stent insertion success rates among the three groups. A multivariate analysis was performed to identify the factors affecting stent insertion ***: In men, 36 (63.2%) cases were deemed successful in the proximal group compared with 40 (80.0%) cases in the middle group and 12 (20.7%) cases in the distal group (p<0.001). In women, 26 (45.6%) cases were deemed successful in the proximal group compared with 54 (98.2%) cases in the middle group and 38 (76.0%) cases in the distal group (p<0.001). With the multivariate analysis, the stent pusher position was the most significant factor influencing successful stent insertion (men: odds ratio 6.00, 95% confidence interval 2.66-13.51, p<0.001;women: odds ratio 37.80, 95% confidence interval 4.94-289.22, p<0.001).Conclusion: The position of the stent pusher affects stent insertion success. The middle of the pubic symphysis is the optimal position for the radiopaque tip of the pusher when inserting ureteral stents under fluoroscopic guidance.

关键词： Stent Cystoscopy Fluoroscopy Ureter

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Accuracy and Utility of Vessel Analysis Using Non-Contrast CT for Planning Endovascular Aortic Repair

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Open Journal of Medical Imaging 2024年第3期14卷 96-105页

作者： Midori Komita-Moriya Yukihisa Ogawa Akiyuki Kotoku Shintaro Nawata Kenji Kuramochi Yasuyoshi Ogawa Kiyoshi Chiba Hiroshi Nishimaki hidefumi Mimura Department of Radiology St. Marianna University School of Medicine Kanagawa Japan Department of Radiology Tokai University School of Medicine Hachioji Hospital Tokyo Japan Radiological Technology St. Marianna University School of Medicine Kanagawa Japan Department of Cardiovascular Surgery St. Marianna University School of Medicine Kanagawa Japan

Objectives: This study aimed to determine whether errors in vascular measurements would affect device selection in endovascular aortic repair (EVAR) by comparing measurements obtained using non-contrast computed tomography (NCT) with those obtained using contrast-enhanced CT (CECT). Materials and Methods: This single-center, retrospective study included 25 patients who underwent EVAR for abdominal aortic aneurysm at our institution. A 1-mm horizontal cross-sectional slice of NCT and CECT from each patient was retrospectively reviewed. The area from the abdominal aorta to the common iliac artery was divided into four zones. A centerline was created using the NCT by manually plotting the center points. Subsequently, the centerlines were automatically extracted and manually corrected during the arterial phase of CECT. The diameter and length of each zone were measured for each modality. The mean diameters and lengths of the target vessels were compared between NCT and CECT. Results: The measurements obtained using both methods were reproducible and demonstrated good agreement. The mean differences in vessel length and diameter measurements for each segment between NCT and CECT were not statistically significant, indicating good consistency. Conclusion: NCT may be useful for preoperative EVAR evaluation in patients with renal dysfunction or allergies to contrast agents.

关键词： Non-Contrast CT Vessel Analysis EVAR Contrast-Enhanced CT Abdominal Aortic Aneurysm

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Mass acquisition of human periodontal ligament stem cells

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World Journal of Stem Cells 2020年第9期12卷 1023-1031页

作者： hidefumi Maeda Department of Endodontology and Operative Dentistry Division of Oral RehabilitationFaculty of Dental ScienceKyushu University3-1-1 MaidashiFukuoka 8128582Japan

The periodontal ligament(PDL)is an essential fibrous tissue for tooth retention in the alveolar bone *** tissue further functions to cushion occlusal force,maintain alveolar bone height,allow orthodontic tooth movement,and connect tooth roots with *** periodontitis,deep caries,and trauma cause irreversible damage to this tissue,eventually leading to tooth loss through the destruction of tooth *** patients suffer from these diseases worldwide,and its prevalence increases with *** address this issue,regenerative medicine for damaged PDL tissue as well as the surrounding tissues has been extensively investigated regarding the potential and effectiveness of stem cells,scaffolds,and cytokines as well as their combined *** particular,PDL stem cells(PDLSCs)have been well *** this review,I discuss comprehensive studies on PDLSCs performed in vivo and contemporary reports focusing on the acquisition of large numbers of PDLSCs for therapeutic applications because of the very small number of PDLSCs available in vivo.

关键词： Induced pluripotent stem cells Mesoderm specific transcript Periodontal ligament stem cells Periodontal tissue Regenerative medicine Semaphorin 3A

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Study on Residential Water Use in North China:Analysis of Nationwide Statistical Data and Case Study of Taiyuan City

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Chinese Journal of Population,Resources and Environment 2006年第4期4卷 24-28页

作者： Imura hidefumi School of Environmental Studies Nagoya University464-8601Japan

Residential water use is gradually becoming the focus in China's municipal water supply planning and management in recent *** is known,however,about the residential water use in modern China due to the transition of economy and enhancement of management on water *** order to better understand the characteristics of residential water use in North China,a model for identifying the determinants of residential water use was established and analyzed by using panel data and cross-section data *** Taiyuan city,the capital city of Shanxi Province in Northern China was selected as a case *** the analyses and field investigation indicate that the relatively slow increase of residential water use in recent years may result from the implementation of strict laws and regulations on water *** through the investigation, first-hand information about water consumption pattern,water reuse/conservation,people's attitude toward water quantity and quality,*** been obtained.

关键词： cross-section data panel data residential water use Taiyuan city water conservation

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Effect of Non-Newtonian Viscosity for Surfactant Solutions on Vortex Characteristics in a Swirling Pipe Flow

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Journal of Thermal Science 2005年第4期14卷 357-361,356页

作者： Mizue MUNEKATA hidefumi TAKAKI Hideki OHBA Kazuyoshi MATSUZAKI Kumamoto University 2-39-1 KurokamiKumamoto 860-8555Japan Tokyo Electron LTD. 650 Mitsuzawa Hosaka-cho NirasakiYamanashi 407-0192Japan

Effects of non-Newtonian viscosity for surfactant solution on the vortex characteristics and drag-reducing rate in a swirling pipe flow are investigated by pressure drop measurements, velocity profile measurements and viscosity measurements. Non-Newtonian viscosity is represented by power-law model （t= kD^π）. Surfactant solution used has shear-thinning viscosity with n 〈 1.0. The swirling flow in this study has decay of swirl and vortex-type change from Rankin＇s combined vortex to forced vortex. It is shown that the effect of shear-thinning viscosity on the decay of swirl intensity is different by vortex category and the critical swirl number with the vortex-type change depends on shear-thinning viscosity.

关键词： swirling flow drag reduction surfactant solution non-Newtonian fluid vortex LDV.

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Analysis of driving forces behind diversified carbon dioxide emission patterns in regions of the mainland of China

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Frontiers of Environmental Science & Engineering 2011年第3期5卷 445-458页

作者： Xin TIAN hidefumi IMURA Miao CHANG Feng SHI Hiroki TANIKAWA Graduate School of Environmental Studies Nagoya UniversityNagoya 464-8601Japan School of Environment Tsinghua UniversityBeijing 100084China

China has large regional disparities in carbon dioxide CO_(2) emissions with economic development among its 31 provincial mainland *** paper investigates these disparities in CO_(2) emission patterns and identifies the factors underlying the *** show that the 30 study China's mainland provinces(Tibet not included)can be divided into seven groups with three typical CO_(2) emission *** decomposition results indicate that changes in economic development,the industrial sector,and technology contribute far more to increased CO_(2) emissions than do population,energy structure,and other *** inspection reveals that different industry structures and technology contribute greatly to the differences observed in CO_(2) emissions between provinces with similar economic *** study highlights the importance of region-specific industrial structure adjustment policies,especially for regions transitioning to heavy industry and for those still in the primary stages of *** potential application of a domestic carbon emissions trading system,to encourage regional investment in updated technology,is also discussed.

关键词： carbon dioxide emission patterns China economic development index decomposition analysis industrialization

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Rupture of small cystic pancreatic neuroendocrine tumor with many microtumors

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World Journal of Gastroenterology 2017年第37期23卷 6911-6919页

作者： Ryota Sagami hidefumi Nishikiori Shoichiro Ikuyama Kazunari Murakami Department of Gas--troenterology Oita San-ai Medical Center Department of Internal Medicine and Clinical Investigation Oita San-ai Medical Center Department of Gastroenterology Faculty of Medicine Oita University

Pancreatic neuroendocrine tumors(p NETs) are particularly rare. The various forms of PNETs, such as cystic degeneration, make differentiation from other similar pancreatic lesions difficult. We can detect small lesions by endoscopic ultrasound(EUS) and obtain preoperative pathological diagnosis by EUS-guided fine needle aspiration(FNA). We describe, here, an interesting case of p NET in a 42-year-old woman with no family history. Computed tomography and magnetic resonance imaging revealed an 18 mm × 17 mm cystic lesion with a nodule in the pancreatic tail. Two microtumors about 7 mm in diameter in the pancreatic body detected only by EUS, cystic rim and nodules all showed similar enhancement on contrast-harmonic EUS. Preoperative EUS-FNA of the microtumor was performed, diagnosing multiple p NETs. Macroscopic examination of the resected pancreatic body and tail showed that the cystic lesion had morphologically changed to a 13-mm main nodule, and 11 new microtumors(diameter 1-3 mm). Microscopically, all microtumors represented p NETs. From the findings of a broken peripheral rim on the main lesion with fibrosis, rupture of the cystic p NET was suspected. Postoperatively, pituitary adenoma and parathyroid adenoma were detected. The final diagnosis was multiple grade 1 p NETs with multiple endocrine neoplasia type 1. To the best of our knowledge, no case of spontaneous rupture of a cystic p NET has previously been reported in the English literature. Therefore, this case of very rare p NET with various morphological changes is reported.

关键词： Rupture Cystic pancreatic neuroendocrinetumor MEN1 NET Microtumor

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High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time mapping

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Photonics Research 2016年第1期4卷 13-16页

作者： Takashi Ito Ondrej Slezak Masahiro Yoshita hidefumi Akiyama Yohei Kobayashi Institue for Solid State Physics University of Tokyo HiLASE Centre Institute of Physics ASCR

The group-delay dispersion of an optical fiber was measured with the time-of-flight method, using fingerprint-like characteristic spectra from a mode-locked fiber laser source. To determine the group-delay dispersion up to the fourth order, least-squares fitting was applied to the overall time waveform mapped on the time axis for the fingerprint-spectral broadband pulses through a long optical fiber. The analysis of all 4003 data points reduced statistical uncertainty, and provided second-, third-, and fourth-order dispersion with uncertainties of 0.02%, 0.4%, and 4%,respectively.

关键词： length time High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time mapping

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An unusual enteropathy-associated T-cell lymphoma with MYC translocation arising in a Japanese patient:A case report

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World Journal of Gastroenterology 2012年第19期18卷 2434-2437页

作者： Kenji Okumura Masahiko Ikebe Tatsuro Shimokama Morishige Takeshita Nao Kinjo Keishi Sugimachi hidefumi Higashi Department of Surgery Nippon Steel Yawata Memorial HospitalKitakyushu 805-8508Japan Department of Pathology Nippon Steel Yawata Memorial HospitalKitakyushu 805-8508Japan Department of Pathology School of MedicineFukuoka UniversityFukuoka 814-0180Japan

Enteropathy-associated T-cell lymphoma （EATL） is a rare peripheral T-cell lymphoma classified into 2 types, with or without celiac disease, based on histology. Type 2 EATL is less commonly associated with celiac disease, in which cells are characterized by being monomorphic and small- to medium-sized. Cells are characterized by CD8 and CD56 expression and c-MYC oncogene locus gain. We present an atypical case of type 2 EATL in the jejunum, with human T-lymphotropic virus-1 that was CD4- CDS＋ CD56- CD30- CD25- TIA-I＋ and granzyme B＋ on immunohistological staining. It also displayed translocation of chromosome 8p24 （c-MYC）, as de- termined by fluorescent/n situ hybridization. Mucosalspreading and intraepithelial invasion by lymphoma with villous atrophy were detected adjacent to the mucosal layer. The lymphoma may be derived from in- traepithelial CD8＋ T cells, similar to celiac disease.

关键词： Enteropathy-associated T-cell lymphoma Celiac disease Human T-lymphotropic virus-l Fluores-cent in situ hybridization Chromosome 8p24

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SD3, an Arabidopsis thaliana Homolog of TIM21, Affects Intracellular ATP Levels and Seedling Development

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Molecular Plant 2012年第2期5卷 461-471页

作者： hidefumi Hamasaki Takeshi Yoshizumi Naoki Takahashi Mieko Higuchi Takashi Kuromori Yuko Imura Hiroaki Shimada Minami Matsui Plant Functional Genomics Research Group Plant Science Center RIKEN Yokohama Institute 1-7-22 Suehiro-cho Tsurumi-ku Yokohama Kanagawa 230-0045 Japan Department of Biological Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba 278-8510 Japan Gene Discovery Research Group RIKEN Plant Science Center RIKEN Yokohama Institute 1-7-22 Suehiro-cho Tsurumi-ku Yokohama Kanagawa 230-0045 Japan

It is poorly understood how plants control their growth by cell division, elongation, and differentiation. We have characterized a seedling-lethal mutant segregation distortion 3 （sd3） that showed a very dwarf phenotype when grown in the light and, in the dark, had short hypocotyls with reduced ploidy levels. The corresponding gene of SD3 encodes a protein with high similarity to yeast translocase on the inner mitochondrial membrane 21 （TIM21）, which is a component of the TIM23 complex. Indeed, SD3 protein fused to GFP localized in the mitochondria. SD3 overexpression increased cotyledon size in the light and hypocotyl thickness in the dark. The expression of genes for several subunits of the respiratory-chain complexes III and IV was up-regulated in SD3-overexpressing plants. Furthermore, these plants showed high levels of ATP whereas those of sd3 were low. These results suggested that SD3 induced an increase in cell size by raising the expression of the respiratory-chain subunit genes and hence increased the intracellular ATP levels, We propose that intracellular ATP levels regulated by mitochondria control plant organ size.

关键词： hypocotyl elongation endoreduplication mitochondria ATR

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