检索结果-南通市图书馆

维普期刊数据库博看期刊

早期腹腔镜胆囊切除术治疗胆源性胰腺炎的临床效果观察

在线全文

学校读者我要写书评

暂无评论

中国现代药物应用 2024年第3期18卷 21-25页

作者：郭长伟阜新市第二人民医院(阜新市妇产医院) 123000

目的观察胆源性胰腺炎患者采用早期腹腔镜胆囊切除术治疗的临床效果。方法选择80例胆源性胰腺炎患者作为研究对象,按照随机方法分为对照组和研究组,每组40例。对照组采取延迟腹腔镜胆囊切除术治疗,研究组采取早期腹腔镜胆囊切除术治疗... 详细信息

目的观察胆源性胰腺炎患者采用早期腹腔镜胆囊切除术治疗的临床效果。方法选择80例胆源性胰腺炎患者作为研究对象,按照随机方法分为对照组和研究组,每组40例。对照组采取延迟腹腔镜胆囊切除术治疗,研究组采取早期腹腔镜胆囊切除术治疗。比较两组患者住院时间、手术时间、术中失血量、生活质量评分、生化指标恢复正常时间、总并发症发生率。结果与对照组的住院时间(24.75±4.26)d、手术时间(63.14±7.39)min相比,研究组的(14.43±2.04)d和(53.21±7.42)min更短,差异具有统计学意义(P0.05)。研究组躯体功能、社会功能、生理功能、情感恢复方面的生活质量评分显著高于对照组,差异具有统计学意义(P0.05)。研究组的总并发症发生率为5.00%,低于对照组的20.00%,差异具有统计学意义(P<0.05)。结论在胆源性胰腺炎治疗中,早期腹腔镜胆囊切除术相比延迟腹腔镜胆囊切除术具有更多的优点,可以缩短住院时间、降低并发症风险、减少医疗费用、缓解疼痛和不适等,但是需要将患者的具体情况和病情考虑在内,医生需要根据患者的实际情况进行个性化的治疗方案制定。

关键词：胆源性胰腺炎早期腹腔镜胆囊切除术延迟腹腔镜胆囊切除术

腹腔镜联合胆道镜行胆囊切除胆总管探查取石临床分析

在线全文

学校读者我要写书评

暂无评论

中国医疗器械信息 2024年第4期30卷 39-41页

作者：郭长伟阜新市第二人民医院(阜新市妇产医院) 辽宁阜新123000

目的:分析腹腔镜联合胆道镜行胆总管探查取石的临床价值。方法:选取2020年7月~2022年7月本院收治的60例胆总管结石患者作为研究对象,按照治疗方法的不同分为对比组和实验组,每组30例。对比组给予开腹手术治疗,实验组给予腹腔镜联合胆道... 详细信息

目的:分析腹腔镜联合胆道镜行胆总管探查取石的临床价值。方法:选取2020年7月~2022年7月本院收治的60例胆总管结石患者作为研究对象,按照治疗方法的不同分为对比组和实验组,每组30例。对比组给予开腹手术治疗,实验组给予腹腔镜联合胆道镜治疗,比较两组临床疗效。结果:实验组和对比组临床疗效分别为96.67%(29/30)和70.00%(21/30),差异有统计学意义(P<0.05)。实验组和对比组在症状消失时间、SF-36评分、并发症指数对比分别为(2.37±0.45)h和(4.43±0.36)h、(29.01±0.73)分和(16.86±0.15)分、(0.79±0.41)‰和(3.60±1.15)‰,差异有统计学意义(P<0.05)。实验组在症状自评量表SCL-90、VAS、ADL上显著优于对比组,结果分别为(1.29±0.35)分和(3.83±0.90)分、(1.76±0.52)分和(3.67±0.31)分、(9.18±0.45)分和(7.64±0.13)分,差异有统计学意义(P<0.05)。结论:腹腔镜联合胆道镜行胆总管探查取石的临床价值突出,可作为有效保障临床疗效,改善患者预后的方法加以尝试。

关键词：腹腔镜胆道镜联合胆总管探查取石

大隐静脉高位结扎剥脱术联合腹腔镜下交通支离断术治疗下肢静脉溃疡的效果分析

在线全文

学校读者我要写书评

暂无评论

中国实用医药 2024年第3期19卷 28-32页

作者：郭长伟阜新市第二人民医院(阜新市妇产医院) 123000

目的探究下肢静脉溃疡患者实施腹腔镜下交通支离断术结合大隐静脉高位结扎剥脱术治疗的临床效果。方法100例下肢静脉溃疡患者,依据不同治疗方式分成观察组和对照组,每组50例。观察组采用腹腔镜下交通支离断术结合大隐静脉高位结扎剥脱... 详细信息

目的探究下肢静脉溃疡患者实施腹腔镜下交通支离断术结合大隐静脉高位结扎剥脱术治疗的临床效果。方法100例下肢静脉溃疡患者,依据不同治疗方式分成观察组和对照组,每组50例。观察组采用腹腔镜下交通支离断术结合大隐静脉高位结扎剥脱术治疗,对照组采用传统大隐静脉高位结扎剥脱术治疗。比较两组手术相关情况、生活质量评分、临床疗效、术后并发症发生情况、患者对治疗方式的满意度。结果观察组住院时间(5.10±2.54)d、术后疾病恢复时间(13.35±2.47)d均短于对照组的(8.12±6.23)、(61.02±5.26)d,差异有统计学意义(P<0.05)。观察组社会、躯体、环境、心理评分分别为(27.55±5.18)、(25.36±5.41)、(24.67±5.43)、(24.14±5.47)分,均高于对照组的(18.20±4.26)、(17.25±4.11)、(17.28±4.14)、(17.26±4.91)分,差异有统计学意义(P<0.05)。观察组治疗总有效率98.00%高于对照组的76.00%,差异有统计学意义(P<0.05)。观察组术后并发症发生率2.00%明显低于对照组的14.00%,差异有统计学意义(P<0.05)。观察组患者对治疗方式的总满意率98.00%高于对照组的80.00%,差异有统计学意义(P<0.05)。结论通过腹腔镜下交通支离断术结合大隐静脉高位结扎剥脱术治疗下肢静脉溃疡患者,对其临床疗效的提升、生活质量的改善意义重大,同时能够缩短疾病治疗所用时间,降低术后并发症发生率,提升患者对手术治疗方式的满意度,值得推广。

关键词：下肢静脉溃疡大隐静脉高位结扎剥脱术腹腔镜下交通支离断术疗效

Effects of Pulsed Current and Pulsed Magnetic Field Complex Pretreatment on Martensite Transformation of Cr5Steel during Continuous Cooling

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2015年第12期22卷 1131-1137页

作者： Qing-chun LI Li-juan LI guo-wei chang Qi-jie ZHAI School of Materials Science and Engineering Liaoning University of Technology School of Materials Science and Engineering Shanghai University

Carbide precipitation and martensite transformation in Cr5 steel have been observed in situ by high-temper- ature confocal laser-scanning microscopy. In this way, the influences of pulsed current and pulsed magnetic field complex pretreatment on carbide precipitation and martensite transformation during continuous cooling have been studied. The results show that the electropulsing complex pretreatment promotes the precipitation of M7 C3-type car- bides at high temperature, increases the start and finish temperatures of martensite transformation, and extends the phase transformation time. Martensite prefers to nucleate in the austenite with less precipitation of carbides due to the chemically homogeneous distribution of solute atoms.

关键词： pulsed current pulsed magnetic field pretreatment martensite transformation

Migration of δ/γ Interface in Low Carbon Steels during Continuous Cooling

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2014年第9期21卷 855-861页

作者： Qing-chun LI Yong-feng QI Shu XU Chao WANG guo-wei chang School of Materials Science and Engineering Liaoning University of Technology

The δ-ferrite to γ-austenite phase transformation process of low carbon steel was observed in-situ under a confocal scanning laser microscope and the influence of manganese and chromium on the migration of δ/γ interphase boundary during theδ to γphase transformation was studied. It was found that the δ/γ interphase boundary becomes unstable with the decrease of temperature, from planar to curved morphology during theδ to γ phase transformation of Fe-0.08C steel and Fe-0.08C-0.8Mn steel. But in Fe-0.08C-0.8Cr steel, the δ/γ interphase boundaries are stable with planar morphology during the whole δ-ferrite to γ-austenite transformation. The destabilization of δ/γ inter- phase boundary in Fe-0.08C and Fe-0.08C-0.8Mn steels results from high degree of supercooling and sub-boundaries in 7, respectively. The stabilization of δ/γ interphase boundary in Fe-0.08C-0.8Cr steel results from the slow diffu- sion rate of carbon atom induced by the addition of chromium.

关键词： phase transition δ/γ interphase boundary migration low carbon steel

Research of {0001} crystal orientation for magnesium alloys solidified in a fashion of cellular crystals

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2012年第2期19卷 136-140页

作者： guo-wei chang Shu-ying Chen Qing-chun Li Xu-dong Yue Yi-hui Qi School of Materials Science and Engineering Liaoning University of TechnologyJinzhou 121001China

The magnesium alloy grew in a fashion of cellular crystals during the process of unidirectional solidification, and the {0001} crystal face orientation in the cast ingot of the magnesium alloy was studied. The theoretical model and methodology were set up, and a cor-responding experiment was carried out to verify the theoretical analysis results. The experimental results indicate that the {0001} crystal face of magnesium crystals parallels to the width direction for the thin-plate cast ingot when the magnesium grows in a manner of cellular crystals. The separation angle between the {0001} crystal face of magnesium crystals and the vertical axis line of the cast ingot is about 62° for the circular column cast ingot, which distributes in cone-type. The theoretical analysis results are basically in agreement with the experimental ones of previous literatures and this paper.

关键词： magnesium alloys solidification crystal growth crystal faces

Lateral growth rate of δ phase during solidification of Fe-0.15wt%C-0.8wt%Mn steel

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2012年第4期19卷 312-316页

作者： guo-wei chang Shu-ying Chen Qing-chun Li Xu-dong Yue Guang-can Jin School of Materials Science and Engineering Liaoning University of Technology Jinzhou 121001 China

Taking Fe-0.15wt%C-0.8wt%Mn steel as the research object, in situ observations of the 8 phase growth process during solidifica- tion were conducted by using a high-temperature confocal scanning laser microscope （HTCSLM）. The effects of the solid/liquid （S/L） inter- face＇s shape, temperature, and curvature radius on the lateral growth rate of 6 phase were investigated in detail, and the relational expression among the lateral growth rate of 5 phase, temperature, and curvature radius of column-shaped ~ phase was deduced for the carbon steel dur- ing solidificatiorL The results indicate the growth rate of the concave-shaped S/L interface is larger than that of the convex-shaped S/L inter- face during the beginning growth of ~ phase, but these two kinds of growth rates gradually approach with proceeding in solidification. The calculated lateral growth rate of 6 phase is consistent with the experimental result at a cooling rate of 0.045℃/s.

关键词： carbon steel solidification ferrite growth rate interfaces

Wide‑field swept‑source OCT angiography of the periarterial capillary‑free zone before and after anti‑VEGF therapy for branch retinal vein occlusion

在线全文

学校读者我要写书评

暂无评论

Eye and Vision 2024年第2期10卷 31-40页

作者： Wenyi Tang wei Liu Jingli guo Lili Zhang Gezhi Xu Keyan Wang Qing chang Department of Ophthalmology Eye and ENT Hospital of Fudan University83 Fenyang RoadShanghai 200031China Shanghai Key Laboratory of Visual Impairment and Restoration Fudan UniversityShanghaiChina NHC Key Laboratory of Myopia(Fudan University) Laboratory of MyopiaChinese Academy of Medical SciencesShanghaiChina

Background:The aim of the study was to investigate the changes in the periarterial capillary-free zone(paCFZ)after anti-vascular endothelial growth factor(VEGF)therapy in patients with branch retinal vein occlusion(BRVO)by widefield swept-source optical coherence tomography angiography(SS-OCTA)and assess their associations with clinical ***:In this retrospective observational study of 54 treatment-naive BRVO patients with macular edema,we reviewed the findings of 12×12 mm^(2)SS-OCTA at baseline,3,6,and 12 months after intravitreal ranibizumab *** paCFZ and major retinal artery areas were measured on SS-OCTA *** paCFZ area to artery area(P/A)ratio was ***:The paCFZ areas and P/A ratios of first-and second-order arteries were significantly greater in BRVO eyes than in contralateral eyes(all P<0.01),but there were no differences in the first-and second-order artery areas(P=0.20 and 0.25,respectively).The paCFZ areas and P/A ratios decreased significantly at 3,6,and 12 months after anti-VEGF therapy(all P<0.01).The baseline P/A ratio was significantly correlated with the baseline best-corrected visual acuity(BCVA),central retinal thickness,and their improvements at 3,6,and 12 months(all P<0.05).Baseline BCVA and P/A ratios of first-and second-order arteries were independently associated with the final BCVA in multivariate linear ***:Wide-field SS-OCTA shows that anti-VEGF therapy can lead to a significant improvement in the paCFZ parameters in *** baseline P/A ratios on SS-OCTA tend to predict better visual outcomes at 12 months after anti-VEGF therapy.

关键词： Swept-source optical coherence tomography angiography Branch retinal vein occlusion Periarterial capillary free zone Anti-VEGF treatment Prognosis

Dynamic Analysis of A Deepwater Drilling Riser with A New Hang-off System

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Ocean Engineering 2024年第1期38卷 29-41页

作者： LI Yan-wei LIU Xiu-quan WANG Jin-long CHEN guo-ming chang Yuan-jiang SHENG Lei-xiang Centre for Offshore Engineering and Safety Technology China University of PetroleumQingdao 266580China National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of PetroleumQingdao 266580China China CNOOC Research Institute Co. Ltd.Beijing 100028China

The safety of risers in hang-off states is a vital challenge in offshore oil and gas engineering.A new hang-off system installed on top of risers is proposed for improving the security of *** approach leads to a challenging problem:coupling the dynamics of risers with a new hang-off system combined with multiple structures and complex *** accurately analyze the dynamic responses of the coupled system,a coupled dynamic model is established based on the Euler-Bernoulli beam-column theory and penalty function method.A comprehensive analysis method is proposed for coupled dynamic analysis by combining the finite element method and the Newmarkβ*** analysis program is also developed in MATLAB for dynamic *** simulation results show that the dynamic performances of the risers at the top part are significantly improved by the new hang-off system,especially the novel design,which includes the centralizer and articulation *** bending moment and lateral deformation of the risers at the top part decrease,while the hang-off joint experiences a great bending moment at the bottom of the lateral restraint area which requires particular attention in design and *** platform navigation speed range under the safety limits of risers expands with the new hang-off system in use.

关键词： deepwater drilling riser new hang-off system dynamic analysis finite element method penalty function method