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Bare sclera resection followed by mitomycin C and/or autograft limbus conjunctiva in the surgery for pterygium:a Meta-analysis

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International Journal of Ophthalmology(English edition) 2015年第5期8卷 1067-1073页

作者： tan long Zhi Li Department of Ophthalmology Xi'an No.1 Hospital Department of Ophthalmology Xiangyang Central Hospital

AIM: To evaluate the recurrence and complications after bare sclera resection (BSR) combined with mitomycin C (MMC) treatment and/or autograft limbus conjunctiva (ALC) in the surgery for pterygium. METHODS: Meta -analysis was used to evaluate the differences in patient outcomes between BSR of pterygium with or without MMC and/or ALC. All included studies were randomized trials of patients with pterygium who received BSR followed by MMC and/or ALC in the surgery. The recurrence of pterygium and other complications resulting from different treatments were extracted for analysis. RESULTS: Thirteen studies met the inclusion criteria. The recurrence of pterygium with intraoperative (10) MMC was higher than that with ALC (OR=2.38,95% confidence interval 1.45-3.91, I-2=29%). Postoperative MMC resulted in an incidence of recurrence similar to that of ALC (OR= 0.66, 95% confidence interval 0.30-1.42, I-2=0%), and 10 MMC treatment in combination with ALC produced similar patient outcomes to ALC alone (OR =0.41, 95% confidence interval 0.16-1.01, I-2=16%). Other complications such as punctate epitheliopathy, scleral thinning and ischemia, irritation and persistent epithelium defect, were more common in patients in the MMC group as compared to those treated with ALC. CONCLUSION: The recurrence of pterygium with BSR followed by ALC is lower than that of BSR followed by MMC, and the incidence of other complications is lower. While ALC is a more effective strategy for treating pterygium, the quality of the ALC transplant should be considered when the patient has a history of glaucoma.

关键词： pterygium mitomycin C conjunctiva autogaft

Robotic pancreaticoduodenectomy for pancreatic ductal adenocarcinoma: Analysis of surgical outcomes and long-term prognosis in a high-volume center

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Hepatobiliary & Pancreatic Diseases International 2023年第2期22卷 140-146页

作者： Xiu-Ping Zhang Shuai Xu Zhi-Ming Zhao Qu Liu Guo-Dong Zhao Ming-Gen Hu Xiang-long tan Rong Liu Faculty of Hepato-Biliary-Pancreatic Surgery The First Medical CenterChinese PLA General HospitalBeijing 100853China Department of Liver Transplantation and Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021China

Background: Robotic pancreaticoduodenectomy(RPD) has been reported to be safe and feasible for patients with pancreatic ductal adenocarcinoma(PDAC) of the pancreatic head. This study aimed to analyze the surgical outcomes and risk factors for poor long-term prognosis of these patients. Methods: Data from patients who underwent RPD for PDAC of pancreatic head were retrospectively analyzed. Multivariate Cox regression analysis was used to seek the independent prognostic factors for overall survival(OS), and an online nomogram calculator was developed based on the independent prognostic factors. Results: Of the 273 patients who met the inclusion criteria, the median operative time was 280.0 minutes, the estimated blood loss was 100.0 m L, the median OS was 23.6 months, and the median recurrence-free survival(RFS) was 14.4 months. Multivariate analysis showed that preoperative carbohydrate antigen 19-9(CA19-9) [hazard ratio(HR) = 2.607, 95% confidence interval(CI): 1.560-4.354, P < 0.001], lymph node metastasis(HR = 1.429, 95% CI: 1.005-2.034, P = 0.047), tumor moderately(HR = 3.190, 95% CI: 1.813-5.614, P < 0.001) or poorly differentiated(HR = 5.114, 95% CI: 2.839-9.212, P < 0.001), and Clavien-Dindo grade ≥ Ⅲ(HR = 1.657, 95% CI: 1.079-2.546, P = 0.021) were independent prognostic factors for OS. The concordance index(C-index) of the nomogram constructed based on the above four independent prognostic factors was 0.685(95% CI: 0.640-0.729), which was significantly higher than that of the AJCC staging(8th edition): 0.541(95% CI: 0.493-0.589)( P < 0.001). Conclusions: This large-scale study indicated that RPD was feasible for PDAC of pancreatic head. Preoperative CA19-9, lymph node metastasis, tumor poorly differentiated, and Clavien-Dindo grade ≥ Ⅲ were independent prognostic factors for OS. The online nomogram calculator could predict the OS of these patients in a simple and convenient manner.

关键词： Robotic pancreaticoduodenectomy Nomogram long-term prognosis Pancreatic ductal adenocarcinoma

Refractive accuracy after intraocular lens implantation in pediatric cataract

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International Journal of Ophthalmology(English edition) 2012年第4期5卷 473-477页

作者： tan long, Li-Xin Xie Department of Ophthalmology People's Hospital of Wuhan University Wuhan 430060 Hubei Province China Shandong Eye Institute Qingdao 266071 Shandong Province China

AIM: To analyze the factors that influence the prediction error (PE). after intraocular lens (IOL) implantation in pediatric cataract. METHODS: The medical records of cataract patients of no more than 14 years old who had primary IOL implantation were reviewed from 2006 to 2010. The PE, absolute value of PE (APE), and predictability between in different axial length, mean corneal curvature, corneal astigmatism, and age at the surgery were analyzed. RESULTS: Seventy-five children (119 eyes) were included, with a mean age of (5.09 +/- 2.54) years. At the follow-up of (1.19 +/- 0.69) months, the mean postoperative PE was (-0.22 +/- 1.12) D, and APE was (0.87 +/- 0.73)D. The PE in eyes with an axial length > 20mm but longer axis, and the APE in eyes with an axial length <= 20mm was more obvious compared with the others. The correlations between PE and axial length, as well as corneal astigmatism, and between APE and axial length were significant. The predictability was significantly poorer in the eyes with an axial length <= 20mm than the others. CONCLUSION: The axial length is closely related with the PE after IOL implantation in pediatric cataract patients, especially when it is <= 20mm, PE is more significant. The formula that is more suitable to very short axial length should be explored.

关键词： cataract children refraction intraocular lens

Effects of rafting on the meso deformation and fracture behaviour of a Ni-based single crystal superalloy at room temperature: In-situ observation and simulation

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Science China(Technological Sciences) 2024年第7期67卷 2133-2146页

作者： tan long YANG XiaoGuang SHI DuoQi FAN YongSheng SHI Yi School of Energy and Power Engineering Beihang UniversityBeijing 102206China Research Institute of Aero-Engine Beihang UniversityBeijing 102206China National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics Beihang UniversityBeijing 102206China School of Materials Science&Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Microstructural rafting of Ni-based single-crystal(SC) superalloys is inevitable at elevated temperatures during long-term service with mechanical loading, which significantly affects the mechanical behaviour of the material. In this study, the effects of rafting on the mesodeformation and fracture behaviour of a Ni-based SC superalloy under cyclic and tensile loads were investigated using in situ scanning electron microscopy(SEM), digital image correlation(DIC), and crystal plasticity finite element method(CP-FEM) simulations. The results indicated that the tensile strength decreased significantly in the rafted specimens. In the cyclic tests, both the virgin and rafted specimens showed an increase in the maximum shear strain with cycle number. The interaction of cross-slip bands was captured by in situ SEM-DIC around the micro-notch of the virgin specimens during the tensile test, while a more homogeneous local deformation field was observed in the rafting specimens. In addition,the fracture behaviour was strongly influenced by the rafting morphology. The crack exhibited instantaneous and long-range fracture features along the octahedral plane as it propagated in the rafting specimen, whereas it deflected over a short distance between the crystallographic planes at an early stage in the virgin specimen, which is consistent with the CP-FEM ***, the CP-FEM results for the crack initiation direction on(111) dominant slip plane were consistent with the in situ SEM observations.

关键词： in-situ SEM-DIC Ni-based SC superalloys microstructural rafting deformation crack path CP-FEM

Impact of resection margins on long-term survival after pancreaticoduodenectomy for pancreatic head carcinoma

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World Journal of Clinical Cases 2019年第24期7卷 4186-4195页

作者： Cheng-Gang Li Zhi-Peng Zhou Xiang-long tan Yuan-Xing Gao Zi-Zheng Wang Qu Liu Zhi-Ming Zhao Second Department of Hepatobiliary Surgery Chinese People’s Liberation Army General Hospital

BACKGROUND The impact of resection margin status on long-term survival after pancreaticoduodenectomy(PD) for patients with pancreatic head carcinoma remains controversial and depends on the method used in the histopathological study of the resected specimens. This study aimed to examine the impact of resection margin status on the long-term overall survival of patients with pancreatic head carcinoma after PD using the tumor node metastasis *** Consecutive patients with pancreatic head carcinoma who underwent PD at the Chinese People's Liberation Army General Hospital between May 2010 and May 2016 were included. The impact of resection margin status on long-term survival was retrospectively *** Among the 124 patients, R0 resection was achieved in 85 patients(68.5%), R1 resection in 38 patients(30.7%) and R2 resection in 1 patient(0.8%). The 1-and 3-year overall survival(OS) rates were significantly higher for the patients who underwent R0 resection than the rates for those who underwent R1 resection(1-year OS rates: 69.4% vs 53.0%;3-year OS rates: 26.9% vs 11.7%). Multivariate analysis showed that resection margin status and venous invasion were significant risk factors for *** Resection margin was an independent risk factor for OS for patients with pancreatic head carcinoma after PD. R0 resection was associated with significantly better OS after surgery.

关键词： Pancreatic head cancer Pancreaticoduodenectomy R0 resection margin Overall survival Disease-free survival R1 resection

High-performance SiO/C as anode materials for lithium-ion batteries using commercial SiO and glucose as raw materials

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Rare Metals 2021年第5期40卷 1110-1117页

作者： Zi-long Wu Shan-Bao Ji Lie-Kai Liu Tian Xie long tan Hao tang Run-Guang Sun School of Materials Science and Engineering Nanchang UniversityNanchang 330031China

Silicon monoxide(SiO)is considered as a promising anode material for lithium-ion batteries(LIBs)due to its higher capacity and longer cycle life than those of graphite and silicon,*** this study,glucose was developed as a suitable and inexpensive carbon source to synthesize SiO/C composite with a high *** addition,the effects of the calcination temperature and the amount of c arbon source on the electrochemical performance of the SiO/C composite were *** addition of 5 wt%glucose and a calcination temperature of 800℃ demonstrated the optimum conditions for SiO/C *** resultant SiO/C showed an initial charge capacity of 1259 mAh·g^(-1) and a high initial coulombic efficiency of 71.9%.A charge capacity of 850 mAh·g^(-1) after 100 cycles at 200 mA·g^(-1) was achieved,demonstrating the best value of the SiO/C-based *** composition changes of SiO under the calcination temperature played a significant role in the electrochemical ***,the obtained SiO/C material with a high capacity and good stability is suitable for LIB applications as an anode material.

关键词： Lithium-ion battery Anode material Silicon monoxide Glucose Carbon coating SiO/C

Experiment and finite element method analysis mass erosion and transfer of Ag/La_2NiO_4-based electrical contacts during operation

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Rare Metals 2013年第1期32卷 93-99页

作者： Song Chen Wei-Ming Guan Kun-Hua Zhang Zhi-long tan Ming Xie Kunming Institute of Precious Metals State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals

A uniform transient temperature field model of electrical contacts operation was found by analyzing the process of closing arc constriction resistance Joule heat ~ breaking arc. Essential parameters of Ag/La2NiO4 electrical contact material for transient temperature field calculation were obtained through tests of electrical contact experimental instrument under 18 V DC in different cur- rents, other correlation experiments, and calculation anal- ysis. The finite element method was applied to solve the transient temperature field, and the features and distribution of the transient temperature field were obtained. The condition of material erosion and mass transfer can be forecasted by those calculation results. It is beneficial to research about the lifetime of Ag/La2NiO4 electrical material.

关键词： Electrical contact Finite element Mass transfer Erosion Temperature field model

Electronic Structure and Optical Properties of Layered Ternary Carbide Ti3AIC2

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Chinese Physics Letters 2011年第3期28卷 180-183页

作者： JIANG Jiu-Xing JIN Shan WANG Zhen-Hua tan Chang-long Department of Applied Physics Harbin University of Science and TechnologyHarbin 150080 School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001

The electronic structure and optical properties of the layered ternary compound Ti_(3)AlC_(2)are studied by the planewave psedudopotential method within the generalized gradient *** results show that Ti_(3)AlC_(2)is an electronic *** total density of states at the Fermi level mainly originates from Ti d ***,it is found that the reflectivity is nonselective in the visible *** particular,the reflectivity is high in the ultraviolet region,indicating that Ti_(3)AlC_(2)can be a promising candidate for use as an anti-ultraviolet ray coating ***,the mechanism of the optical properties is investigated on the basis of the electronic structure.

关键词： structure coating ultraviolet

Perineural invasion of hilar cholangiocarcinoma in Chinese population: One center’s experience

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World Journal of Gastrointestinal Oncology 2020年第4期12卷 457-466页

作者： Cheng-Gang Li Zhi-Peng Zhou Xiang-long tan Zhi-Ming Zhao Second Department of Hepatobiliary Surgery Chinese PLA General HospitalBeijing 100853China

BACKGROUND Hilar cholangiocarcinoma(HCCA)often produces perineural invasion(PNI)extending to extra-biliary sites,while significant confusion in the incidence of PNI in HCCA has occurred in the literature,and the mechanism of that procedure remains *** To summarize the incidence of PNI in HCCA and to provide the distribution of nerve plexuses around hepatic portal to clinical *** Reported series with PNI in HCCA since 1996 were reviewed.A clinicopathological study was conducted on sections from 75 patients with HCCA to summarize the incidence and modes of *** stains for CD34 and D2-40 in the cancer tissue were performed to clarify the association of PNI with microvessel and lymph *** of the hepatoduodenal ligament from autopsy cases were scanned and handled by computer to display the distribution of nerve plexuses around the hepatic *** The overall incidence of PNI in this study was 92%(69 of 75 patients),while the rate of PNI in HCCA in the literature ranging from 38%to 100%.The incidence of PNI did not show any remarkable differences among various differentiated groups and Bismuth-Corlette classification *** regression analysis identified the depth of tumor invasion was the only factor that correlated significantly with PNI(P0.01).In spite of finding tumor cells that could invade microvessels and lymph ducts in HCCA,we did not find tumor cells invaded nerves via microvessels or lymph *** nerve plexuses in the hepatoduodenal ligament and Glisson’s sheath were classified,and they all surrounded the great vessels very *** The incidence of PNI of HCCA in Chinese population is around 92%and correlated significantly with a depth of tumor *** also should be considered when stratifying HCCA patients for further treatment.

关键词： Hilar cholangiocarcinoma Perineural invasion Pathology Nerve plexus Incidence Treatment