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Biomedical Engineering Communications 2024年第1期3卷 31-37页

作者： yan-Chen Wang xiao-yan guo Yao-Fei Sun Li-Hui Guan Yuan Gao Zhe Meng Cheng-Liang Yin Tong-Bin Gao Department of Urology Weifang People's HospitalWeifang 261000China Faculty of Medicine Macao University of Science and TechnologyMacao 999078China

The surgical removal of renal cancer,along with the thrombectomy of the inferior vena cava tumour thrombus,represents a remarkable milestone in urological *** procedure is not only technically demanding but also requires a high level of surgical *** renal cancer combined with a vena cava tumour thrombus poses significant challenges,especially when dealing with combined grade Ⅱ-Ⅳ inferior vena cava tumour *** complexity of these cases is further exacerbated by the delicate anatomical structures involved and the need to preserve critical vessels while effectively removing the *** Upper Urethral Tumour Treatment Centre of Weifang People's Hospital successfully treated a challenging case of left renal tumour combined with grade II inferior vena cava tumour *** surgical team,led by experienced urological surgeons,meticulously planned and executed the procedure,ensuring minimal trauma to the patient and complete removal of the *** achievement not only demonstrates the hospital's commitment to providing state-of-the-art surgical care but also highlights the importance of continued research and training in urological *** successful outcome of this case is a testament to the expertise and dedication of the medical team and offers hope to patients facing similar complex surgical challenges.

关键词： renal carcinoma vena cava tumour thrombus renal artery embolism transoesophageal echocardiography three-dimensional reconstruction techniques

Imaging findings and transcatheter arterial chemoembolization of hepatic malignancy with right atrial embolus in 46 patients

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World Journal of Gastroenterology 2008年第22期14卷 3563-3568页

作者： Hong-yan Cheng xiao-yan Wang guo-Li Zhao Dong Chen Department of Radiology Eastern Hepatobiliary Surgery Hospital 225 Changhai Road Shanghai 200438 China

AIM: To analyze the imaging findings of hepatic malignancy with right atrial (RA) embolus. METHODS: Forty-six patients with an embolus in the RA were diagnosed, including 44 patients with hepatocellular carcinoma (HCC), 1 patient with cholangiocellular carcinoma and 1 patient with hepatic carcinoma metastasis. The diagnosis was confirmed by clinical examination, serum α-fetoprotein and imaging. Seventeen patients underwent transcatheter arterial chemoembolization (TACE). RESULTS: On enhancement computer tomography (CT) or magnetic resonance (MR) imaging, a nodular filling defect in the RA could be easily found, with a slight enhancement in the arterial phase. The coronal images of CT or MR showed the extent of lesion. Lipiodol entered the embolus after TACE, hence reducing the speed of embolus growth. There was a survival benefit for patients receiving anticancer treatment. CONCLUSION: Patients with HCC, showing a filling defect of the inferior vena cava (IVC), hepatic vein (HV) and RA on images, can be diagnosed with RA embolus. Encroachment of the RA is very rare in patients with hepatic malignancies. Furthermore, a prolongation of survival time is found in those patients who underwent TACE.

关键词： Carcinoma Liver Neoplasm Metastasis Embolus Right atrium Computed tomography X-Ray Magnetic resonance

Kidney inflammatory myofibroblastic tumor masquerading as metastatic malignancy: A case report and literature review

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World Journal of Clinical Cases 2019年第24期7卷 4366-4376页

作者： guo-Hui Zhang xiao-yan guo Gao-Zhao Liang Qing Wang Graduate School Guangdong Medical UniversityZhanjiang 524000Guangdong ProvinceChina Department of Urology The Second Affiliated HospitalShenzhen UniversityShenzhen 518100Guangdong ProvinceChina

BACKGROUND Inflammatory myofibroblastic tumor(IMT) is a rare mesenchymal tumor that is characterized by spindle cells differentiated from muscle fibroblasts and infiltration of various types of inflammatory cells. IMT can occur at any age and at any anatomic site. The most common location of IMT is the bladder in the genitourinary tract. Only scarce cases of kidney IMT have been reported in the *** SUMMARY A 77-year-old woman, with a history of bilateral renal calculus for 15 years, was admitted to the Department of Urology of our hospital complaining of recurrent painless gross hematuria for one month. The treatment with cephalosporin was ineffective. Computed tomography imaging showed a mixed density and slightly heterogeneously enhanced lesion in the middle pole of the left kidney and ipsilateral adrenal enlargement. The patient underwent surgical treatment by retroperitoneoscopic left radical nephrectomy plus adrenalectomy. A large number of typical spindle cells surrounded by plasma cells and lymphocytes were observed microscopically. Immunohistochemical analyses indicated that these spindle cells were positive for vimentin, cytokeratin(CK), Ki-67, CK7,CD34, and CD31 and were focally positive for CD10 and anaplastic lymphoma kinase(ALK-1). Thus, a diagnosis of IMT was made definitively. The patient recovered well after operation, and no recurrence or metastasis was noted during the 22-mo *** Since kidney IMT is very rare and lacks characteristic clinical manifestation, it is easily misdiagnosed as a malignant tumor before operation. Surgery remains the best choice for diagnosis and treatment, and such cases must be followed carefully because of the uncertain biological behavior of this tumor. This report suggests that renal calculus may be one of the causes of IMT, but further investigation is necessary to prove it.

关键词： Inflammatory myofibroblastic tumor Kidney Diagnosis Renal calculus Case report

Study on Preparation and Properties of Polyether Polytriazole Elastomers

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Chinese Journal of Polymer Science 2015年第4期33卷 597-606页

作者：翟进贤 Zheng-yang Qu Ye-cheng Zou xiao-yan guo Rong-jie yang School of Materials Beijing Institute of Technology

To explore the application of click chemistry in the field of elastomer materials, propargyl-terminated ethylene oxide-tetrahydrofuran copolymer （PTP（E-co-T）） was prepared from hydroxyl-terminated ethylene oxide-tetrahydrofuran copolymer （P（E-co-T）） by end-etherisation modification. FTIR and ^13C-NMR results indicate that P（E-co-T）-terminated hydroxyl was etherified thoroughly, yielding the target product PTP（E-co-T）, and the content of terminated alkynyl of PTP（E-co-T） was evaluated to be 0.428 mmol.g^-l. Using a polyazide compound as a cross-linker, polytriazole elastomers with various functional molar ratio （R） values were prepared from PTP（E-co-T） by virtue of the CuAAC reaction. Mechanical property tests indicate that with the increase in R, the modulus E and stress Orb of the polytriazole elastomers first increase and subsequently decrease, whereas the strain first decreases and later increases. The mechanical properties of the polytriazole elastomers show a parabolic dependence on the R value. Near the stoichiometric ratio, E and Orb show maxima and the strain εb shows a minimum. Swelling tests demonstrate that the apparent molecular weight of polytriazole elastomer strands also first decreases and subsequently increases. At the stoichiometric ratio, the network structure possesses strands with a minimum apparent molecular weight and a maximum apparent density. Dynamic mechanical analysis reveals that the polytriazole elastomers presented damping peaks at approximately -64℃, corresponding to the glass transition of copolyether strands, and the elastomer exhibited the lowest dissipation factor tanδ at the stoichiometric ratio. Thermal analysis suggests that the weight-loss process of the polytriazole elastomer is characteristic of one-step decomposition, and the elastomer begins to decompose from polyether strands, not triazole groups.

关键词： Click chemistry Polytriazole Elastomers PTP(E-co-T).

Decreased expression of gastrokine 1 in gastric mucosa of gastric cancer patients

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World Journal of Gastroenterology 2014年第44期20卷 16702-16706页

作者： xiao-yan guo Lei Dong Bin Qin Jiong Jiang A-Meng Shi Department of Gastroenterology Second Affiliated Hospital of Xi’an Jiaotong University

AIM: To investigate the expression of gastrokine 1 (GKN1) in normal gastric mucosa, precancerous lesions and gastric cancer tissues, and to analyse its correlations with tumour site and pathological pattern.

关键词： Gastrokine 1 Gastric cancer Gastric mucosa Expression

LH Plays a Role to Enhance the Nuclear and Cytoplasm Synchronization During In vitro Maturation of Ovine Oocytes

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Agricultural Sciences in China 2011年第1期10卷 136-141页

作者： LI Kai NI He-min LIU Yun-hai ZHAO yan-wei QU yang-yan LI xiao-yan guo Yong Department of Animal Science ＆ Technology Beijing University o[ Agriculture Beijing 102206 P.R.China

This study is aimed to investigate the effect of luteinizing hormone （LH） on maturation and fertilization in vitro of ovine oocytes. The ovine oocytes were cultured in vitro in medium with or without LH, and then checked by confocal laser scanning microscope to observe the distribution of cortical granules stained with FITC-LCA during different maturation periods. Similarly, some in vitro matured oocytes were also fertilized in vitro for analysis of their developmental potentiality further. After being cultured in vitro for 4 h, there were significant differences about the rate of germinal vesicle break down （GVBD） between the treatment （with LH） and the control groups （without any hormones）（36.76% vs 18%, P〈0.05）. Further, there were also significant differences of the cleavage and blastocyst rates between these two groups （67.15% vs 42.37%, 21.9% vs 12.71%, P〈0.05, respectively）. The distribution of cortical granules appeared to spread from the edges to the central site of sheep oocytes following their delaying durations of maturation in vitro. It can be concluded that LH may play a role to delay the occurence of GVBD, prolong the maturation duration of cytoplasm, and enhance the nuclear and cytoplasm synchronization of ovine oocytes matured in vitro and finally improve their in vitro developmental potentiality.

关键词： ovine oocyte luteinizing hormone in vitro maturation in vitro fertilization distribution of cortical granules

Formation of Ultrafine Apatite Fibers by Sol-gel/Electrospinning

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Chemical Research in Chinese Universities 2007年第3期23卷 366-369页

作者： DING Ya-mei YUAN xiao-yan ZHAO Jin guo Wan-chun WANG Xiu-kui School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China

Ultrafine apatite fibers were prepared by electrospinning of sol-gel precursor/poly（ vinyl pyrrolidone）（PVP） solutions followed by subsequent calcination. The as-electrospun and calcinated fibers were observed under a scanning electron microscope and an optical polarizing microscope. Results show that the morphology and the diameter of as-electrospun fibers strongly depend on the viscosity and the surface tension of sol-gel precursor/PVP solutions. After calcination, the smooth as-electrospun fibers shrink and the fiber diameter decreases because of the removal of the polymer. The chemical evolution upon the transformation of the precursor from a gel to the final apatite fibers was investigated by thermogravimetric-differenfial thermal analysis, X-ray diffraction, and Fourier transform infrared spectroscopy. It is thus suggested that the crystalline structure of the calcined fibers is largely influenced by the calcination temperature. After being calcined at 600 ℃, the apatite fibers with a diameter of about 280 nm containing β-tricalcium phosphate were obtained.

关键词： Apatite Ultrafine fiber Sol-gel Electrospinning

Effect of precipitate evolution on corrosion behavior of friction stir welded joints of AA2060-T8 alloy

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Transactions of Nonferrous Metals Society of China 2019年第4期29卷 701-709页

作者： Qiang MENG yang LIU Ju KANG Rui-dong FU xiao-yan guo Yi-jun LI AVIC Manufacturing Technology Institute Beijing 100024China State Key Laboratory of Metastable Materials Science and Technology College of Materials Science and EngineeringYanshan UniversityQinhuangdao 066004China Beijing Higher Institution Engineering Research Center of Energy Engineering Advanced Joining Technology Beijing Institute of Petrochemical TechnologyBeijing 102617China

Friction stir welding was used to join two AA2060-T8 plates,and then the effect of precipitate evolution on microstructure and corrosion behavior of the joint was *** evolution of precipitates on the top surface of the joint was characterized by scanning electron microscopy and transmission electron *** corrosion behaviors of different regions in the joint were investigated by an electrochemistry method and an alternating salt spray *** corrosion was mainly dependent on the nature of precipitates in each region of the *** shoulder affected zone had the worst corrosion resistance as a result of the re-dissolved ofθ′(Al2Cu),T1(Al2CuLi)andδ′(Al3Li)phases,the formation of intergranular precipitates and precipitate-free ***,the thermomechanically affected zone had a slightly improved corrosion resistance because it had no intergranular *** heat affected zone and base metal had the best corrosion resistance.

关键词： 2060-T8 aluminum alloy friction stir welding precipitate microstructure micro-electrochemical characteristics

Changes of the proportion and mortality of pulmonary thromboembolism in hospitalized patients from 1974 to 2005

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Chinese Medical Journal 2006年第12期119卷 998-1002页

作者： TAN xiao-yan HE Jian-guo ZOU Zhi-peng ZHAO yan-fen CHEN Bai-ping GAO Ying XIONG Chang-ming NI Xin-hai CHENG Xian-sheng Centre of Diagnosis and Management of Pulmonary VascularDiseases Fuwai Hospital Chinese Academy of Medical Sciences＆ Peking Union Medical College Beijing 100037 China

Background Pulmonary thromboembolism （PTE） has become a common disease that severely endangers people＇s health. This study analysed the changes in proportion and mortality of PTE in hospitalized patients to provide data for prevention and management of the disease. Methods The data of 763 hospitalized patients with PTE from 1974 to 2005 in Fuwai Hospital were analysed. Results During the 1970s, 0.27% of patients in a cardiovascular hospital had PTE （〈 5 cases per year）; while so far this century the proportion is 0.94% （48 to 113 per year）. The mortality of hospitalized PTE patients fell from 20.00% in the 1970s to 4.10% this century. Prior to 1990, the mortality of hospitalized PTE patients was 12.50%, and in the years after 1990 only 3.40%. The difference was statistically significant （P〈0.005）. People with this disease were mostly between the ages of 30 and 69 years. Men were most susceptible between the ages of 30 and 69 years, while women between the ages of 40 and 69 years. Men contracted PTE 10 years earlier than women. The mortality of male PTE patients was 4.70%, not significantly different from female patients, 5.06% （0.50〈P〈0.75）. There were not any significant differences between the mortality of patients in the different age groups overall （≤39, 40-49, 50-59, and ≥60 years, P〉0.1）. More people contracted the disease in winter than in other seasons （P〈0.05）. There was no obvious difference between the mortality in different seasons overall （0.75〈P〈0.90）. Conclusion PTE is an increasingly significant disease and deserves adequate attention.

关键词： pulmonary thromboembolism mortality proportion of hospitalization

Coupled dynamic response analysis of multi-column floating offshore wind turbine with low center of gravity

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Journal of Ocean Engineering and Science 2024年第1期9卷 25-39页

作者： Jie yang yan-ping He Yong-sheng Zhao xiao-yan yang guo-rong Zhang State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200240China School of Naval Architecture Ocean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Faculty of Maritime and Transportation Ningbo UniversityNingbo 315211China

To realize the application of the floating offshore wind turbine(FOWT)from deep to relatively shallow waters,a new concept of multi-column floating wind turbine platform with low center of gravity(CG)is designed and *** multi-column low CG platform is designed to support a 6MW wind turbine class and operated at a water depth of 50m in the South China *** frequency domain software WADAM and time domain software NREL-FAST are used to simulate coupled dynamic responses of the floating wind turbine system with second-order wave loads *** dynamic behaviors of multi-column low CG FOWT system under normal operation and parked conditions are *** influence of second-order wave force on the motion responses of the multi-column platform,fore-aft force and moment of the tower base and mooring force are researched *** results demonstrate that the coupled dynamic responses at rated operating condition and extreme condition meet the normal operating requirements and extreme survival requirements of FOWT system in the shallow water(50m)of South China *** addition,it is found that,the wave frequency response gradually replaces the second-order low frequency response as the main influencing factor of the coupled dynamic response of the FOWT system with the increasing severity of the sea ***,in general,the magnitude of second-order low frequency response increases with the increasing severity of the design load ***,in the subsequent design of the shallow water FOWT system,the second-order effects should be paid enough attention.

关键词： Floating offshore wind turbine Multi-column platform Second-order wave force Concept design Coupled dynamic response