目的探讨3D显微镜辅助下经颈椎前路减压融合术(anterior cervical discectomy and fusion,ACDF)治疗合并骨性颈椎间孔狭窄的神经根型颈椎病的疗效及安全性。方法回顾性分析我院2019年1月至2020年12月的36例接受3D显微镜辅助下ACDF手术...目的探讨3D显微镜辅助下经颈椎前路减压融合术(anterior cervical discectomy and fusion,ACDF)治疗合并骨性颈椎间孔狭窄的神经根型颈椎病的疗效及安全性。方法回顾性分析我院2019年1月至2020年12月的36例接受3D显微镜辅助下ACDF手术治疗合并骨性颈椎间孔狭窄的神经根型颈椎病病人的临床资料。观察病人术中出血量、术后引流量以及手术并发症发生情况。比较病人术前及末次随访时的颈痛、上肢痛视觉模拟量表(VAS)评分和颈椎功能障碍指数(NDI)。结果所有病人均成功实施手术,未发生血管、神经损伤等严重并发症。术中出血量为(56.4±22.3)mL,术后引流量为(6.7±4.6)mL。末次随访时颈痛VAS评分、上肢痛VAS评分及NDI指数别为(1.1±0.8)分、(1.4±0.9)分和15.6%±4.6%,较术前的(4.8±1.1)分、(6.3±0.9)分和49.3%±6.7%明显降低,差异有统计学意义(P<0.05)。结论3D显微镜辅助下经前路治疗合并骨性颈椎间孔狭窄的神经根型颈椎病疗效确切,是一种高效、安全、可视化的手术技术,值得临床上推广应用。展开更多
Nanoindentation tests were conducted to investigate the near-surface mechanical properties of the individual components(fiber and matrix) for three-dimensional reinforced carbon/carbon composites(3D C/C).Optical micro...Nanoindentation tests were conducted to investigate the near-surface mechanical properties of the individual components(fiber and matrix) for three-dimensional reinforced carbon/carbon composites(3D C/C).Optical microscope and polarizing light microscope were used to characterize the microstructure of 3D C/C.The microscopy results show that large number of pores and cracks exist at both bundle/matrix interface and pitch carbon matrix.These defects have important effect on the mechanical behavior of 3D C/C.The in situ properties for components of 3D C/C were acquired by nanoindentation technique.Relative to the matrix sample,the fiber samples have more larger values for modulus,stiffness and hardness.However,there is no significant difference of modulus and stiffness among fiber samples with different directions.展开更多
In this study, we designed and synthesized a novel battery-type electrode featuring three-dimensional(3D) hierarchical ZnO@Ni_xCo_(1-x)(OH)_y core/shell nanowire/nanosheet arrays arranged on Nifoam substrate via a two...In this study, we designed and synthesized a novel battery-type electrode featuring three-dimensional(3D) hierarchical ZnO@Ni_xCo_(1-x)(OH)_y core/shell nanowire/nanosheet arrays arranged on Nifoam substrate via a two-step protocol including a wet chemical process followed by electro-deposition. We then characterized its composition, structure and surface morphology by X-ray diff raction, energy-dispersive X-ray spectrometry(EDS), X-ray photoelectron spectroscopy, scanning electron microscopy(SEM), transmission electron microscopy, EDS elemental mapping. Our electrochemical measurements show that the ZnO@Ni_(0.67)Co_(0.33)(OH)_y electrode material exhibited a noticeably high specific capacity of as much as 255(mA ·h)/g at 1 A/g. Additionally, it demonstrated a superior rate capability, as well as an excellent cycling stability with 81.6% capacity retention over 2000 cycles at 5 A/g. This sample delivered a high energy density of 64 W·h/kg and a power density of 250 W/kg at a current density of 1 A/g. With such remarkable electrochemical properties, we expect the 3D hierarchical hybrid electrode material presented in this work to have promising applications for the next generation of energy storage systems.展开更多
文摘目的探讨3D显微镜辅助下经颈椎前路减压融合术(anterior cervical discectomy and fusion,ACDF)治疗合并骨性颈椎间孔狭窄的神经根型颈椎病的疗效及安全性。方法回顾性分析我院2019年1月至2020年12月的36例接受3D显微镜辅助下ACDF手术治疗合并骨性颈椎间孔狭窄的神经根型颈椎病病人的临床资料。观察病人术中出血量、术后引流量以及手术并发症发生情况。比较病人术前及末次随访时的颈痛、上肢痛视觉模拟量表(VAS)评分和颈椎功能障碍指数(NDI)。结果所有病人均成功实施手术,未发生血管、神经损伤等严重并发症。术中出血量为(56.4±22.3)mL,术后引流量为(6.7±4.6)mL。末次随访时颈痛VAS评分、上肢痛VAS评分及NDI指数别为(1.1±0.8)分、(1.4±0.9)分和15.6%±4.6%,较术前的(4.8±1.1)分、(6.3±0.9)分和49.3%±6.7%明显降低,差异有统计学意义(P<0.05)。结论3D显微镜辅助下经前路治疗合并骨性颈椎间孔狭窄的神经根型颈椎病疗效确切,是一种高效、安全、可视化的手术技术,值得临床上推广应用。
基金Project(61391) supported by the National Security Basic Research Program of ChinaProject (91016029) supported by the National Natural Science Foundation of China
文摘Nanoindentation tests were conducted to investigate the near-surface mechanical properties of the individual components(fiber and matrix) for three-dimensional reinforced carbon/carbon composites(3D C/C).Optical microscope and polarizing light microscope were used to characterize the microstructure of 3D C/C.The microscopy results show that large number of pores and cracks exist at both bundle/matrix interface and pitch carbon matrix.These defects have important effect on the mechanical behavior of 3D C/C.The in situ properties for components of 3D C/C were acquired by nanoindentation technique.Relative to the matrix sample,the fiber samples have more larger values for modulus,stiffness and hardness.However,there is no significant difference of modulus and stiffness among fiber samples with different directions.
基金supported by the National Basic Research Program of China ("973" Program, No. 2012CB720302)the National Key Research and Development Program of China (No 2016YFF0102503)
文摘In this study, we designed and synthesized a novel battery-type electrode featuring three-dimensional(3D) hierarchical ZnO@Ni_xCo_(1-x)(OH)_y core/shell nanowire/nanosheet arrays arranged on Nifoam substrate via a two-step protocol including a wet chemical process followed by electro-deposition. We then characterized its composition, structure and surface morphology by X-ray diff raction, energy-dispersive X-ray spectrometry(EDS), X-ray photoelectron spectroscopy, scanning electron microscopy(SEM), transmission electron microscopy, EDS elemental mapping. Our electrochemical measurements show that the ZnO@Ni_(0.67)Co_(0.33)(OH)_y electrode material exhibited a noticeably high specific capacity of as much as 255(mA ·h)/g at 1 A/g. Additionally, it demonstrated a superior rate capability, as well as an excellent cycling stability with 81.6% capacity retention over 2000 cycles at 5 A/g. This sample delivered a high energy density of 64 W·h/kg and a power density of 250 W/kg at a current density of 1 A/g. With such remarkable electrochemical properties, we expect the 3D hierarchical hybrid electrode material presented in this work to have promising applications for the next generation of energy storage systems.
