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Management of the middle hepatic vein and its tributaries in right lobe living donor liver transplantation

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Hepatobiliary & Pancreatic Diseases International 2007年第4期6卷 358-363页

作者： yu, peng-fei Wu, Jian Zheng, Shu-Sen Zhejiang Univ Sch Med Affiliated Hosp 1 Dept Hepatobiliary Surg Hangzhou 310003 Peoples R China

BACKGROUND: Left liver graft from a small donor will not meet the metabolic demands of a larger adult recipient. To overcome the problem of graft size insufficiency, living donor liver transplantation (LDLT) using the right lobe has become a standard method for adult patients. As the drainage of the median sector (segments V, VIII and IV) is mainly by the middle hepatic vein (MHV), the issue of whether the MHV should or should not be taken with the graft or whether the MHV tributaries (V5, V8) should be reconstructed in the recipient remains to be settled. DATA SOURCES: An English-language literature search was conducted using MEDLINE (1985-2006) on right lobe living donor liver transplantation, middle hepatic vein, vein graft, hepatic venoplasty and other related subjects. RESULTS: Some institutions had proposed their policy for the management of the MHV and its tributaries. Dominancy of the hepatic vein, graft-to-recipient weight ratio, and remnant liver volume as well as the donor-to-recipient body weight ratio, the volume of the donor's right lobe to the recipient's standard liver volume and the size of MHV tributaries are the major elements for the criteria of inclusion of the MHV, while for the policy of MHV tributaries reconstruction, the proportion of congestive area and the diameter of the tributaries are the critical elements. Optimal vein grafts such as recipient's portal vein and hepatic venoplasty technique have been used to obviate hepatic congestion and venous drainage disturbance. CONCLUSIONS: Taking right liver grafts with the MHV trunk (extended right lobe grafts) or performing the MHV tributaries reconstruction in modified right lobe grafts, according to the criteria proposed by the institutions with rich experience, can solve the congestion problem of the right paramedian sector and help to improve the outcomes of the patients. The additional use of optimal vein grafts and hepatic venoplasty also can guarantee excellent venous drainage.

关键词： right lobe living donor liver transplantation middle hepatic vein vein graft hepatic venoplasty

A Facile Solvothermal Synthesis of Monodisperse Ni Nanoparticles

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Chemical Research in Chinese Universities 2008年第3期24卷 260-262页

作者： yu peng-fei CUI Bin ZHANG Yan SHI Qi-zhen Shaanxi Key Laboratory of Physico-lnorganic Chemistry Department of Chemistry Northwest University Xi ＇an 710069 P. R. China

A simple solvothermal approach was developed to synthesize uniform spherical monodisperse Ni nanoparticles, which can easily disperse in nonpolar solvents to form homogenous colloidal solution. The as-prepared sample was characterized by XRD, TEM, and FTIR. The results indicate that Ni nanoparticles have the structure of face-centered cube and a narrow distribution with a diameter of （3.5±0.5） nm. The FTIR spectrum reveals that the nanoparticles are coated with oleic acid. In the synthetic process, N2H4·H2O was used as a reducing agent and oleic acid as a surfactant. The probable formation mechanism of the spherical nanoparticles was also discussed.

关键词： Ni nanoparticle Solvothermal method Monodisperse

An investigation of cavitation control using a porous material on a hemispherical cylinder at various cavitation numbers

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JOURNAL OF HYDRODYNAMICS 2024年第5期36卷 870-882页

作者： yu, fei-peng Zhang, Yi-gan Li, Hao-kun Qu, Ze-hui Liu, Hua-ping Huazhong Univ Sci & Technol Sch Aerosp Engn Wuhan 430074 Peoples R China

In this paper, a passive control method based on a porous material is applied to the surface of a hemispherical cylinder to control a cavitating flow, and the control effect of this method at different cavitation numbers (sigma) is evaluated through the cavity morphology and volume, which is important for the application in engineering. The results indicate that the control effect is improved with a reduction in the cavitation number, for the reduction of vapor volume increases from 22%-50% with sigma decreasing from 0.50-0.20. Further investigation indicates that the cavity inception at different cavitation numbers is still induced by the Kelvin-Helmholtz instability, while the spatial distribution of the vapor changes significantly. Moreover, the porous material suppresses the cavitating flow in the front region but enhances it downstream at large cavitation numbers. When sigma = 0.20, the cavitating flow is controlled in both the front and rear regions.

关键词： Cavitation control porous material Kelvin-Helmholtz instability spatial distribution

Variation of Ti Valence with Lithium Content in Lithiated/Delithiated Li_(4)Ti_(5)O_(12) Studied by X-Ray Absorption near the Edge Structure

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Chinese Physics Letters 2013年第3期30卷 108-111页

作者： yu peng-fei CUI Zhong-Hui MENG Jian-Wei GUO Xiang-Xin State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050 State Key Laboratory of ASIC and System Department of MicroelectronicsFudan UniversityShanghai 200433

Synchrotron-based x-ray absorption near-edge structure(XANES)spectroscopy is applied to investigate the variation of Ti valence in the discharge and charge processes of Li_(4)Ti_(5)O_(12).Through analysis of the XANES data,the average valence of Ti can be calculated,which allows quantitative determination of the ratios of Ti^(3+)/Ti^(4+) as a function of Li content in the *** is found that the ratios in the composites of Li_(4)Ti_(5)O_(12)/acetylene black(AB)-carbon are larger than those in Li_(4)Ti_(5)O_(12)/Ag/AB-carbon after the discharge to 1.1 V,indicating a larger amount of Li inserted into the former than that into the *** finding provides a good explanation for the fact that the Li_(4)Ti_(5)O_(12)/AB-carbon samples exhibit larger storage capacities than the Li_(4)Ti_(5)O_(12)/Ag/AB-carbon ones prepared in this work,concerning the larger Ti^(3+)/Ti^(4+) ratio and the larger amount of Li^(+) inserted in the electrode for satisfying the charge neutralization requirement.

关键词： Li_(4)Ti_(5)O_(12) composites XANES

Comparison of Clinical Outcome of Autograft and AIIograft Reconstruction for Anterior Cruciate Ligament Tears

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Chinese Medical Journal 2015年第23期128卷 3163-3166页

作者： yu-Hua Jia peng-fei Sun Department of Orthopedics Qilu Hospital of Shandong University Jinan Shandong 250012 China

Background： Hamstring （HS） autograft and bone-patellar tendon-bone allograft are the most common choice for reconstruction of anterior cruciate ligament （ACL）. There was a little report about the clinical outcome and difference of arthroscopic ACL reconstruction using allograft and autograft. This study aimed to compare the clinical outcome of autograft and allograft reconstruction for ACL tears. Methods： A total of 106 patients who underwent surgery because of ACL tear were included in this study. The patients were randomly divided into two groups, including 53 patients in each group. The patients in group I underwent standard ACL reconstruction with HS tendon autografts, while others in group II underwent reconstruction with bone-patellar tendon-bone allograft. All the patients were followed up and analyzed; the mean follow-up was 81 months （range： 28-86 months）. Clinical outcomes were evaluated using the International Knee Documentation Committee （IKDC）, Lysholm scores, physical instability tests, and patient satisfaction questionnaires. The complication rates of both groups were compared. Tibial and femoral tunnel widening were assessed using lateral and anteroposterior radiographs. Results： At the end of follow-up, no significant differences were found between the groups in terms of IKDC, Lysholm scores, physical instability tests, patient satisfaction questionnaires, and incidences of arthrofibrosis. Tibial and femoral tunnel widening was less in the HS tendon autografts. This difference was more significant on the tibial side. Conclusions： In the repair of ACL tears, allograft reconstruction is as effective as the autograft reconstruction, but the allograft can lead to more tunnel widening evidently in the tibial tunnel, particularly.

关键词： Allograft Anterior Cruciate Ligament Autograft Reconstruction

Modeling of PZT Ferroelectric Ceramic Depolarization Driven by Shock Stress

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Chinese Physics Letters 2011年第8期28卷 322-325页

作者： LAN Chao-Hui peng yu-fei LONG Ji-Dong WANG Qiang WANG Wen-Dou Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900

Shock-induced phase transition of ferroelectric ceramic PZT 95/5 causes elastic stiffening and depolarization,releasing stored electrostatic energy into the load *** develop a model to describe the response of the PZT ferroelectric ceramic and implement it into simulation *** model is based on the phenomenological theory of phase transition dynamics and takes into account the effects of the self-generated intensive electrical field and *** with the discharge model and external circuit,the whole transient process of PZT ceramic depoling can be *** results show the finite transition velocity of the ferroelectric phase and the double wave structure caused by phase *** currents are compared with the results from experiments with shock pressures varying from 0.4 to 2.8 GPa.

关键词： ceramic ferroelectric polarization

Solid pseudopapillary tumor of the pancreas:A review of 553 cases in Chinese literature

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World Journal of Gastroenterology 2010年第10期16卷 1209-1214页

作者： yu, peng-fei Hu, Zhen-Hua Wang, Xin-Bao Guo, Jian-Min Cheng, Xiang-Dong Zhang, yun-Li Xu, Qi Zhejiang Canc Hosp Dept Abdominal Surg Hangzhou 310022 Zhejiang Peoples R China Zhejiang Univ Coll Med Affiliated Hosp 1 Dept Hepatobiliary & Pancreat Surg Hangzhou 310003 Zhejiang Peoples R China Zhejiang Canc Hosp Dept Chemotherapy Ctr Hangzhou 310022 Zhejiang Peoples R China

AIM:To sum up the clinical and pathological characte- ristics of solid pseudopapillary tumor (SPT) and the experience with ***: A total of 553 SPT patients reported in Chinese literature between January 1996 and January 2009 were retrospectively reviewed and analyzed. RESULTS: The mean age of the 553 SPT patients included in this review was 27.2 years, and the male to female ratio was 1:8.37. Their symptoms were non-specific, and nearly one third of the patients were asymptomatic. Computed tomography and ultraso-nography were performed to show the nature and location of SPT. Most of the tumors were distributed in the pancreatic head (39.8%), tail (24.1%), body andtail (19.5%). Forty-five patients (9.2%) were diagnosed as malignant SPT with metastasis or invasion. None of the clinical factors was closely related to the malignant potential of SPT. Surgery was the main therapeutic modality for SPT. Local resection, distal pancreatectomy and pancreatoduodenectomy were the most common surgical procedures. Local recurrence and hepatic metastasis were found in 11 and 2 patients, respectively, after radical resection. Four patients died of tumor progression within 4 years after palliative resection of SPT. The prognosis of SPT patients was good with a 5-year survival rate of 96.9%.CONCLUSION: SPT of the pancreas is a rare indolent neoplasm that typically occurs in young females. It is a low-grade malignancy and can be cured with extended resection. The prognosis of such patients is good although the tumor may recur and metastasize.

关键词： Pancreatic neoplasm Solid pseudopapillary tumor Diagnosis Treatment Prognosis

Pathogenic and pathological characteristic of new type gosling viral enteritis first observed in China

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World Journal of Gastroenterology 2001年第5期7卷 678-684页

作者： An-Chun Cheng Ming-Shu Wang Xiao-yue Chen yu-fei Guo Zhao-yu Liu peng-fei Fang College of Animal Science and Veterinary Medicine,Sichuan Agricultural University,Xinkang Road,Yaan City 625014,Sichuan Province,China College of Animal Science and Veterinary Medicine Sichuan Agricultural University Yaan 625014 Sichuan Province China. Chenganchun@***

AIM: To study the purifying method and characteristics of new gosling viral enteritis virus (NGVEV),the etiological agent of new gosling viral enteritis (NGVE) which was first recognized in China, as well as the pathomorphological development in goslings infected artificially with NGVEV. METHODS: (1)NGVEV virions were purified by the procedure of treatment with chloroform and ammonium sulfate precipitation, dialysis to remove the sulfate radical and ammonium ion and separation by gel filtration chromatography, and SDS-PAGE. (2)Forty-2-day-old White Sichuan goslings were orally administered with NGVEV and 24 hr later 2 birds were randomly selected and killed at 24hr intervals until death occurred. Specimens(duodenum, ileum, liver, heart, kidney, spleen, lung, proventriculus, pancreas, esophagus, and the intestinal embolus) were taken until all birds in this group died and were sectioned and stained with hemotoxylin and eosin and studied by light microscope. RESULTS: NGVEV shared the typical characteristics of Adenovirus and which structural proteins consisted of 15 polypeptides. Necrosis and sloughing of the epithelial cells covering the villus tips of the duodenum were first observed in goslings 2 days postinfection artificially with NGVEV. With the progress of infection, this lesion rapidly occurred in the epithelium at the base of the villus and with infiltration of the inflammatory cells, the jejunum tended to be involved. With the intensification of mucosa necrosis and inflammatory exudation of the small intestine, fibrinonecrotic enteritis was further developed and embolus composed of either intestinal contents wrapped by pseudo-membrane or of the mixture of fibrous exudate and necrotic intestinal mucosa were observed in the middle-lower part of the small intestine. This structure occluded the intestinal tract and made the intestine dilated in appearance. The intestinal glandular cells underwent degeneration, necrosis and might be found sloughed into the lumen.

关键词： Adenoviridae Animals Brain China DNA, Viral Enteritis Female Geese Inclusion Bodies, Viral Poultry Diseases Research Support, Non-U.S. Gov't Virulence Viscera

Iterative Learning Control for a Class of Linear Continuous-time Switched Systems with Fixed Initial Shifts

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Communications in Mathematical Research 2018年第4期34卷 309-328页

作者： xu guang-zhao fu qin du li-li wu jian-rong yu peng-fei li yong School of Mathematics and Physics Suzhou University of Science and TechnologySuzhouJiangsu215009 不详

This paper deals with the problem of iterative learning control for a class of linear continuous-time switched systems in the presence of a fixed initial shift. Here, the considered switched systems are operated during a finite time interval repetitively. According to the characteristics of the systems, a PD-type learning scheme is proposed for such switched systems with arbitrary switching rules, and the corresponding output limiting trajectories under the action of the PD-type learning scheme are given. Based on the contraction mapping method, it is shown that this scheme can guarantee the outputs of the systems converge uniformly to the output limiting trajectories of the systems over the whole time interval. Furthermore, the initial rectifying strategies are applied to the systems for eliminating the effect of the fixed initial shift. When the learning scheme is applied to the systems, the outputs of the systems can converge to the desired reference trajectories over a pre-specified interval. Finally, simulation examples illustrate the effectiveness of the proposed method.

关键词： iterative learning control switched system PD-type learning scheme fixed initial shift output limiting trajectory