目的:探讨OCTA检查在视网膜静脉阻塞诊疗中的重要应用价值。方法:采用回顾性病例对照研究,选取2018-01/10于大连市第三人民医院眼科门诊确诊为视网膜静脉阻塞的患者38例38眼,其患病眼为A组,对侧健康眼为B组。所有患者均接受OCTA对黄斑...目的:探讨OCTA检查在视网膜静脉阻塞诊疗中的重要应用价值。方法:采用回顾性病例对照研究,选取2018-01/10于大连市第三人民医院眼科门诊确诊为视网膜静脉阻塞的患者38例38眼,其患病眼为A组,对侧健康眼为B组。所有患者均接受OCTA对黄斑区视网膜行3mm×3mm范围的模式扫描,获得表层视网膜、深层视网膜、外层视网膜及脉络膜毛细血管层4个层面黄斑血流密度图,测量表层视网膜中心凹无血管区面积(FAZ),Image J软件计算4个层面黄斑区血流密度(MVD),OCT模式测量黄斑中心凹的水平厚度与垂直厚度(CFT)。结果: A组和B组浅层视网膜FAZ、水平CFT及垂直CFT测量均有差异( P <0.01)。A组和B组表层视网膜及深层视网MVD均有差异( P <0.01),外层视网膜层MVD、脉络膜毛细血管层MVD结果无差异( P =0.542、0.489)。BCVA(LogMAR)分别与表层视网膜FAZ、水平CFT及垂直CFT呈正相关( r =0.482、0.652、0.621,均 P <0.01),与表层视网膜MVD及深层视网膜MVD呈负相关( r =-0.486 、-0.465,均 P <0.01)。结论:应用OCTA检查对提示视网膜静脉阻塞患者黄斑区视网膜的微循环障碍和视力预后有重要指导意义。展开更多
目的:探究玻璃体腔注射康柏西普辅助玻璃体切割术(PPV)治疗增殖型糖尿病视网膜病变(PDR)合并玻璃体积血(VH)的疗效及安全性。方法:前瞻性随机对照研究。选取2017-02/2019-09本院眼科收治的PDR合并VH患者作为研究对象,随机分为观察组(39...目的:探究玻璃体腔注射康柏西普辅助玻璃体切割术(PPV)治疗增殖型糖尿病视网膜病变(PDR)合并玻璃体积血(VH)的疗效及安全性。方法:前瞻性随机对照研究。选取2017-02/2019-09本院眼科收治的PDR合并VH患者作为研究对象,随机分为观察组(39例39眼)及对照组(38例38眼)。两组患者均行经睫状体平坦部标准27G PPV治疗,观察组在术前6~7d进行玻璃体腔内注射康柏西普。收集围手术期指标,随访最佳矫正视力(BCVA)、眼压、黄斑中心凹视网膜厚度(CMT),统计手术相关并发症发生情况。结果:观察组手术时间(74.18±15.26 vs 96.17±14.27min)、出血眼数(8%vs 37%)、硅油填充比例(18%vs 53%)、医源性裂孔发生率(15%vs 47%)少于对照组(P<0.05);观察组术后1mo(0.33±0.10 vs 0.60±0.21)、3mo(0.29±0.08 vs 0.59±0.30)、6mo(0.28±0.10 vs 0.66±0.25)时BCVA(LogMAR)显著优于对照组(P<0.05);观察组术后3mo(252.15±56.96 vs 278.41±57.48μm)、6mo(239.65±41.52 vs 268.59±33.71μm)时CMT显著优于对照组(P<0.05);随访期间观察组及对照组玻璃体出血发生率为5%、21%(P<0.05);对照组术后3眼(8%)出现牵拉性视网膜脱离,观察组未发生牵拉性视网膜脱离(P>0.05)。结论:对于PDR合并VH患者,PPV术前辅助使用玻璃体腔注射康柏西普可缩短手术时间,减少术中出血,减轻黄斑水肿,获得更好的视力,有较好的疗效及安全性。展开更多
Magnetic reconnection processes in three-dimensional(3D)complex field configurations have been investigated in different magneto-plasma systems in space,laboratory,and astrophysical systems.Two-dimensional(2D)features...Magnetic reconnection processes in three-dimensional(3D)complex field configurations have been investigated in different magneto-plasma systems in space,laboratory,and astrophysical systems.Two-dimensional(2D)features of magnetic reconnection have been well developed and applied successfully to systems with symmetrical property,such as toroidal fusion plasmas and laboratory experiments with an axial symmetry.But in asymmetric systems,the 3D features are inevitably different from those in the 2D case.Magnetic reconnection structures in multiple celestial body systems,particularly star-planet-Moon systems,bring fresh insights to the understanding of the 3D geometry of reconnection.Thus,we take magnetic reconnection in an ancient solar-lunar terrestrial magneto-plasma system as an example by using its crucial parameters approximately estimated already and also some specific applications in pathways for energy and matter transports among Earth,ancient Moon,and the interplanetary magnetic field(IMF).Then,magnetic reconnection of the ancient lunar-terrestrial magnetospheres with the IMF is investigated numerically in this work.In a 3D simulation for the Earth-Moon-IMF system,topological features of complex magnetic reconnection configurations and dynamical characteristics of magnetic reconnection processes are studied.It is found that a coupled lunar-terrestrial magnetosphere is formed,and under various IMF orientations,multiple X-points emerge at distinct locations,showing three typical magnetic reconnection structures in such a geometry,i.e.,the X-line,the triple current sheets,and the A-B null pairs.The results can conduce to further understanding of reconnection physics in 3D for plasmas in complex magnetic configurations,and also a possible mechanism for energy and matters transport in evolutions of similar astrophysical systems.展开更多
基金supported by the National Natural Science Foundation of China(52022072,51972243,92060202 and 52202067)the National Key R&D Programs(2021YFB3701400)+2 种基金Hubei Provincial Natural Science Foundation of China(Distinguished Young Scholars 2022CFA042)Independent Innovation Projects of Hubei Longzhong Laboratory(2022ZZ-10)the Research Fund for Central Universities(2020IVB074 and 2021IVA094)。
基金financially supported by the National Natural Science Foundation of China(51972243,52022072,52332003,52322207,92060202)the National Key R&D Programmes(2021YFB3701400)+3 种基金Hubei Provincial Natural Science Foundation of China(Distinguished Young Scholars 2022CFA042)the Independent Innovation Projects of Hubei Longzhong Laboratory(2022ZZ-10)Jingdezhen Huaxun Special Ceramics Co.,Ltdthe Key Research and Development Plan of Jiangxi Province(2020ZDYFB0017)。
文摘目的:探讨OCTA检查在视网膜静脉阻塞诊疗中的重要应用价值。方法:采用回顾性病例对照研究,选取2018-01/10于大连市第三人民医院眼科门诊确诊为视网膜静脉阻塞的患者38例38眼,其患病眼为A组,对侧健康眼为B组。所有患者均接受OCTA对黄斑区视网膜行3mm×3mm范围的模式扫描,获得表层视网膜、深层视网膜、外层视网膜及脉络膜毛细血管层4个层面黄斑血流密度图,测量表层视网膜中心凹无血管区面积(FAZ),Image J软件计算4个层面黄斑区血流密度(MVD),OCT模式测量黄斑中心凹的水平厚度与垂直厚度(CFT)。结果: A组和B组浅层视网膜FAZ、水平CFT及垂直CFT测量均有差异( P <0.01)。A组和B组表层视网膜及深层视网MVD均有差异( P <0.01),外层视网膜层MVD、脉络膜毛细血管层MVD结果无差异( P =0.542、0.489)。BCVA(LogMAR)分别与表层视网膜FAZ、水平CFT及垂直CFT呈正相关( r =0.482、0.652、0.621,均 P <0.01),与表层视网膜MVD及深层视网膜MVD呈负相关( r =-0.486 、-0.465,均 P <0.01)。结论:应用OCTA检查对提示视网膜静脉阻塞患者黄斑区视网膜的微循环障碍和视力预后有重要指导意义。
文摘目的:探究玻璃体腔注射康柏西普辅助玻璃体切割术(PPV)治疗增殖型糖尿病视网膜病变(PDR)合并玻璃体积血(VH)的疗效及安全性。方法:前瞻性随机对照研究。选取2017-02/2019-09本院眼科收治的PDR合并VH患者作为研究对象,随机分为观察组(39例39眼)及对照组(38例38眼)。两组患者均行经睫状体平坦部标准27G PPV治疗,观察组在术前6~7d进行玻璃体腔内注射康柏西普。收集围手术期指标,随访最佳矫正视力(BCVA)、眼压、黄斑中心凹视网膜厚度(CMT),统计手术相关并发症发生情况。结果:观察组手术时间(74.18±15.26 vs 96.17±14.27min)、出血眼数(8%vs 37%)、硅油填充比例(18%vs 53%)、医源性裂孔发生率(15%vs 47%)少于对照组(P<0.05);观察组术后1mo(0.33±0.10 vs 0.60±0.21)、3mo(0.29±0.08 vs 0.59±0.30)、6mo(0.28±0.10 vs 0.66±0.25)时BCVA(LogMAR)显著优于对照组(P<0.05);观察组术后3mo(252.15±56.96 vs 278.41±57.48μm)、6mo(239.65±41.52 vs 268.59±33.71μm)时CMT显著优于对照组(P<0.05);随访期间观察组及对照组玻璃体出血发生率为5%、21%(P<0.05);对照组术后3眼(8%)出现牵拉性视网膜脱离,观察组未发生牵拉性视网膜脱离(P>0.05)。结论:对于PDR合并VH患者,PPV术前辅助使用玻璃体腔注射康柏西普可缩短手术时间,减少术中出血,减轻黄斑水肿,获得更好的视力,有较好的疗效及安全性。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11975087,42261134533,and 42011530086)the National Magnetic Confinement Fusion Energy Research and Development Program of China(Grant No.2022YFE03190400)the Heilongjiang Touyan Innovation Team Program,China.
文摘Magnetic reconnection processes in three-dimensional(3D)complex field configurations have been investigated in different magneto-plasma systems in space,laboratory,and astrophysical systems.Two-dimensional(2D)features of magnetic reconnection have been well developed and applied successfully to systems with symmetrical property,such as toroidal fusion plasmas and laboratory experiments with an axial symmetry.But in asymmetric systems,the 3D features are inevitably different from those in the 2D case.Magnetic reconnection structures in multiple celestial body systems,particularly star-planet-Moon systems,bring fresh insights to the understanding of the 3D geometry of reconnection.Thus,we take magnetic reconnection in an ancient solar-lunar terrestrial magneto-plasma system as an example by using its crucial parameters approximately estimated already and also some specific applications in pathways for energy and matter transports among Earth,ancient Moon,and the interplanetary magnetic field(IMF).Then,magnetic reconnection of the ancient lunar-terrestrial magnetospheres with the IMF is investigated numerically in this work.In a 3D simulation for the Earth-Moon-IMF system,topological features of complex magnetic reconnection configurations and dynamical characteristics of magnetic reconnection processes are studied.It is found that a coupled lunar-terrestrial magnetosphere is formed,and under various IMF orientations,multiple X-points emerge at distinct locations,showing three typical magnetic reconnection structures in such a geometry,i.e.,the X-line,the triple current sheets,and the A-B null pairs.The results can conduce to further understanding of reconnection physics in 3D for plasmas in complex magnetic configurations,and also a possible mechanism for energy and matters transport in evolutions of similar astrophysical systems.
