检索结果-南通市图书馆

Current status of endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第26期25卷 3313-3333页

作者： Chonlada Krutsri Mitsuhiro Kida Hiroshi Yamauchi Tomohisa Iwai Hiroshi Imaizumi Wasaburo Koizumi Department of Surgery Faculty of MedicineRamathibodi HospitalMahidol UniversityBangkok 10400Thailand Department of Gastroenterology Graduate School of MedicineKitasato University HospitalKanagawa 252-0375Japan

Endoscopic retrograde cholangiopancreatography(ERCP)in patients with surgically altered anatomy must be performed by a highly experienced *** challenges are accessing the afferent limb in different types of reconstruction,cannulating a papilla with a reverse orientation,and performing therapeutic interventions with uncommon endoscopic *** development of endoscopic techniques has led to higher success rates in this group of ***-assisted ERCP is the endoscopic procedure of choice for high success rates in short-limb reconstruction;however,these success rate is lower in long-limb *** assisted by endoscopic ultrasonography is now popular because it can be performed independent of the limb length;however,it must be performed by a highly experienced and skilled *** deployment and small stone removal can be performed immediately after ERCP assisted by endoscopic ultrasonography,but the second session is needed for other difficult procedures such as cholangioscopy-guided electrohydraulic ***-assisted ERCP has an almost 100%success rate in longlimb reconstruction because of the use of a conventional side-view duodenoscope,which is compatible with standard *** requires cooperation between the surgeon and endoscopist and is suitable in urgent situations requiring concomitant *** review focuses on the advantages,disadvantages,and outcomes of various procedures that are suitable in different situations and reconstruction *** new techniques and their outcomes are also discussed.

关键词： Endoscopic retrograde cholangiopancreatography Surgically altered anatomy Endoscopic retrograde cholangiopancreatography in Billroth II Endoscopic retrograde cholangiopancreatography post-Whipple Endoscopic ultrasonography-guided endoscopic retrograde cholangiopancreatography

^(40)Ar-^(39)Ar dating and geological implication of auriferous altered rocks from the middle-deep section of Q875 gold-quartz vein in Xiaoqinling area, Henan,China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2002年第20期47卷 1750-1755页

作者： WANG Yitian, MAO Jingwen, LU Xinxiang & YE AnwangInstitute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China Institute of Geological Sciences, Henan Province, Zhengzhou 450053, China Lingbao Bureau of Geology and Mineral Institute of Mineral Resources Chinese Acad. of Geological Sciences Beijing 100037 China Institute of Geological Sciences Henan Province Zhengzhou 450053 China Lingbao Bur. of Geol./Mineral Rsrc. Henan Province Lingbao 472500 China

The 40Ar-39Ar age method is employed in this work to analyze the auriferous altered rocks from the middle-deep section of the Q875 gold-quartz vein in the Xiao-qinling area, and the results show that the main gold deposition of the Q875 occurred in ca. 128-126 Ma. As a typical gold-bearing quartz vein in this gold-rich area, the age data obtained from the Q875 also constrain on the metallogenic time of the lode gold deposits developed in the same geological settings. This geochronological study supplies new evidence for further understanding the timing of gold mineralization, the genesis of gold deposits and the geodynamic settings in Xiaoqinling area.

关键词： 40Ar-39Ar dating auriferous altered rock Q875 gold-quartz vein lode gold deposit metallogenic time Xiaoqinling.

The metallogenic models of gold deposits of quartz vein type and altered rock type

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1996年第2期41卷 142-144页

作者：孟良义李绪俊 Department of Geology Changchun University of Earth Sciences Changchun 130026 China

Metallogenic models of gold deposits of quartz vein type and altered rock type will be dis-cussed in this note. They are considered to be closely related to granite spatially andgenetically.

关键词： quartz vein type altered rock type gold deposit metallogenic model.

Hydrogen and oxygen compositions of altered rocks from Qixia gold deposit and their genetic significance, Shandong, China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第S2期44卷 8-9页

作者： ZHAI Jianping, LU Jianjun, HU Kai and XU Guangping Department of Earth Sciences, State Key, Laboratory of Mineral Deposits, Nanjing University, 210093, China Department of Earth Sciences State Key Laboratory of Mineral Deposits Nanjing University 210093 China

1 Sample and analytic methods The Qixia gold deposit is one of the important quartz vein-type deposits hosted in metamorphic rockin east Shandong Province, China. About 12 samples were collected at different depths of the Qixia goldmineral district to investigate the variations in the hydrogen and oxygen isotope compositions of alteredrocks. Hydrogen was extracted by melting samples and oxygen was obtained through oxidation by BrF5.The isotope compositions were measured with MAT252, and the precisions for oxygen and hydrogen isotope analyses were±0.2‰ and 2‰, respectively. All the analyses were fulfilled at the State Key *** Mineral Deposit Research in Nanjing University. The δD and δ18O values relative to SMOW are givenin table 1.

关键词： hydrogen and oxygen isotopes altered rocks Qixia gold deposit Shandong.

Mobility of elements during lamprophyre alteration and altered fluid characteristics in the Zhenyuan gold deposit

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第S2期44卷 254-256页

作者： HUANG Zhilong, LlU Congqiang and XlAO Huayun Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China Open Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

LAMPROPHYRES are one of the rock types which are easily subject to alteration. Alteration can not onlychange their texture and mineral assemblage, but also influence their geochemistry properties. The mostavailable data show that alteration will directly influence the content of Au in lamprophyre. For example,in the Superior area of Canada and the Yilgan area of Australia relatively fresh lamprophyres are bothlow in Au contents (3.9×10-9 and 1.7×10-9, respectively), but the contents of Au in altered lamprophyres from both areas are double increased (38×10-9 and 20×10-9 on average). Lamprophyres arewidely exposed in the Zhenyuan gold deposit, Yunnan Province and they are closely associated with goldmineralization both in space and in time. So the lamprophyres in the Zhenyuan gold deposit can be citedas the most typical example both at home and abroad. Lamprophyres in the mining district have undergonevarying-degree alteration and partly experienced mineralization. On the basis of the mass equilibrium e-

关键词： element mobility altered fluid lamprophyre Zhenyuan gold deposit.

Anal cancer in Chinese:human papillomavirus infection and altered expression of p53

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 1998年第4期4卷 26-30页

作者： LAI MaoDe, LUO MinJie, YAO JianEr and CHEN PeiHuiKeywords anus neoplasms papillomavirus infection DNA, viral p53 gene gene expression polymerase chain reaction

ＡｎａｌｃａｎｃｅｒｉｎＣｈｉｎｅｓｅ：ｈｕｍａｎｐａｐｉｌｏｍａｖｉｒｕｓｉｎｆｅｃｔｉｏｎａｎｄａｌｔｅｒｅｄｅｘｐｒｅｓｓｉｏｎｏｆｐ５３ＬＡＩＭａｏＤｅ，ＬＵＯＭｉｎＪｉｅ，ＹＡＯＪｉａｎＥｒａｎｄＣ... 详细信息

ＡｎａｌｃａｎｃｅｒｉｎＣｈｉｎｅｓｅ：ｈｕｍａｎｐａｐｉｌｏｍａｖｉｒｕｓｉｎｆｅｃｔｉｏｎａｎｄａｌｔｅｒｅｄｅｘｐｒｅｓｓｉｏｎｏｆｐ５３ＬＡＩＭａｏＤｅ，ＬＵＯＭｉｎＪｉｅ，ＹＡＯＪｉａｎＥｒａｎｄＣＨＥＮＰｅｉＨｕｉＳｕｂｊｅｃｔ...

关键词： papillomavirus altered

Petrographic Studies on Hydrothermally altered Conglomerates at Naer Creek, Sichuan Province, China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Global Geology 1999年第1期4卷 1-6页

作者： Liu Li and Yu Junmin (Changchun University of Science and Technology, Changchun 130026,China)

Based on analysing the wall rock alterations and related rocks which were used as a hint for mineral deposits and as a basis of mechanism research of fluid rock interaction, according to the results of petrographic analysis, the authors of this paper consider that the hydrothermally altered conglomerates have the following features. First, the conglomerates studied can be divided into two groups: Group A consists mainly of the gravels of granite and basalt; Group B is mainly composed of the gravels of basalt, limestone, mudstone and granite. Second, three distinct hydrothermal alterations or diagenesis were distinguished in Group A, that is, pre depositional hydrothermal alteration of the volcanic gravels (saussuritzation chloritization, epidotization chloritization, albitization and sericitization), mechanical diagenesis and post diagenetic hydrothermal alteration (epidote chlorite and prehnite calcite association). Third, the Group B is subjected mainly to pre depositional hydrothermal alteration; the alteration types are the same as of Type A. Last, the origin of the post diagenetic hydrothermal alteration of Group A is presumed to be related to the ascending of thermal water along the Naer Creek fault.

关键词： hydrothermally altered conglomerates Naer Creek wall-rock interation fluid rock interation

EUS FNA of altered Left Adrenal Gland Morphology Suggests Amending CT and PET-CT Attenuation Threshold Values That Predict Malignancy

在线全文

学校读者我要写书评

暂无评论

Journal of Cancer Therapy 2012年第6期3卷 1029-1036页

作者： Ferga C. Gleeson Allison J. Clapp Robert C. Murphy Jonathan E. Clain Prasad G. Iyer Elizabeth Rajan Mark D. Topazian Kenneth K. Wang Michael J. Levy Department of Radiology Mayo Clinic College of Medicine Rochester USA Division of Gastroenterology and Hepatology Mayo Clinic College of Medicine Rochester USA

Introduction: In the setting of an extra-adrenal malignancy, it is a recognized clinical challenge to try and distinguish a benign adrenal mass from a metastatic deposit. Current non-invasive diagnostic tools for adrenal gland evaluation include CT, MRI, PET and PET-CT. Diagnostic interpretative error can occur as evaluations rarely have complete cytologic or histologic correlation for concordance purposes. Aims: To establish the performance characteristics of non-contrast CT attenuation values (Hounsfield units-HU) and the optimal PET-CT maximum standard uptake value (SUVmax) for predicting adrenal malignancy when correlated with adrenal gland endoscopic ultrasound fine needle aspiration (EUS FNA) cytology results. Methods: A prospectively maintained EUS database was reviewed to identify consecutive patients who underwent a left adrenal gland FNA. Non-contrast CT attenuation values and SUVmax scores were calculated. EUS FNA cytology results were used as the reference standard for determining the presence of benign versus malignant adrenal gland status. Results: Sixty-two patients (69 ± 11 years) underwent adrenal EUS FNA, 34 (54.8%) of whom had a clinically suspected or established extra-adrenal malignancy. Non-invasive imaging was suggestive of abnormal adrenal morphology or altered PET-CT FDG activity in 45 (72.6%) patients. Elevated attenuation values (≥10 HU) by non-enhanced CT had a sensitivity and specificity of 100% and 34.6%, respectively. The SUVmax for malignant altered morphology was significantly higher than that for benign lesions [(8.5 ± 3.1 vs 3.3 ± 0.7;(p = 0.0001)]. ROC curve analysis indicated that an optimum cutoff SUVmax of ≥4.1 (AUC 0.92) yielded the best power distinction for malignancy with a sensitivity and specificity of 89% and 100%. Conclusion: When evaluating altered adrenal morphology by non-invasive methods, the performance characteristics of elevated CT attenuation values are suboptimal. But by adopting a SUVmax cut-off value of ≥4.1

关键词： altered Adrenal Morphology Endoscopic Ultrasound Fine Needle Aspiration Unenhanced CT Attenuation Value PET Standardized Uptake Value

Estimate of Uniaxial Compressive Strength of Hydrothermally altered Soft Rocks Based on Strength Index Tests

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geomaterials 2018年第2期8卷 15-25页

作者： Masanori Kohno Hiroyuki Maeda Graduate School of Engineering Tottori University Tottori Japan Sapporo Technology Professional Training College Sapporo Japan

The purpose of this study was to clarify the relationships between results of index tests and uniaxial compressive strength (UCS) in hydrothermally altered soft rocks of the Upper Miocene, which are typical of the soft rock found in northeastern Hokkaido, Japan. Index tests were performed using point load testing machine and needle penetrometer with irregular lump specimens under forced-dry, forced-wet, and natural-moist states. The relationships between irregular lump point load strength (IPLS) index and UCS, and needle penetration (NP) index and UCS were “UCS = approximately 19 IPLS index” and “UCS = 0.848 (NP index)0.619”, respectively, in soft rocks with a UCS below 25 MPa. These relationships could be applied to on-site tests of rocks with natural moisture content. The UCS could be calculated from IPLS and NP tests on soft rocks only when UCS was below 25 MPa, using the equations obtained as a result of this study.

关键词： Uniaxial Compressive Strength (UCS) Irregular Lump Point Load Strength (IPLS) Index Needle Penetration (NP) Index Empirical Equation Hydrothermally altered Rocks