Novel electron states stabilized by Coulomb interactions attract tremendous interests in condensed matter physics.These states are studied by corresponding phase transitions occurring at extreme conditions such as mK ...Novel electron states stabilized by Coulomb interactions attract tremendous interests in condensed matter physics.These states are studied by corresponding phase transitions occurring at extreme conditions such as mK temperatures and high magnetic field.In this work,we introduce a magneto-optical Kerr effect measurement system to comprehensively explore these phases in addition to conventional transport measurement.This system,composed of an all-fiber zero-loop Sagnac interferometer and in situ piezo-scanner inside a dilution refrigerator,operates below 100 m K,with a maximum field of 12 Tesla and has a resolution as small as 0.2μrad.As a demonstration,we investigate TbMn_(6)Sn_(6),where the manganese atoms form Kagome lattice that hosts topological non-trivial Dirac cones.We observed two types of Kerr signals,stemming from its fully polarized ferromagnetic ground state and positive charged carriers within the Dirac-like dispersion.展开更多
目的探讨氨甲环酸局部注入和静脉应用对膝关节置换术患者术后失血量和凝血功能的影响。方法选取2017年2月至2018年5月深圳市人民医院收治的120例拟行膝关节置换术患者为研究对象,根据随机数表法将患者分为局部应用组38例、静脉应用组42...目的探讨氨甲环酸局部注入和静脉应用对膝关节置换术患者术后失血量和凝血功能的影响。方法选取2017年2月至2018年5月深圳市人民医院收治的120例拟行膝关节置换术患者为研究对象,根据随机数表法将患者分为局部应用组38例、静脉应用组42例和对照组40例。局部应用组患者在行膝关节置换术成功后放置引流管并缝合关节囊,夹闭引流管4 h后通过引流管注入氨甲环酸;静脉应用组患者在术毕缝合切口前静脉滴注氨甲环酸10 mg/kg;对照组在术毕缝合切口前静脉滴注同等剂量的0.9%氯化钠溶液并不夹闭引流管。比较三组患者术后血红蛋白(Hb)水平和纤维蛋白原浓度以及凝血酶原时间、活化部分凝血活酶时间,并通过容积法计算患者术中出血量、术后引流量、隐性失血量、总失血量,于术后1周行双下肢静脉超声检查是否存在下肢深静脉血栓(DVT),于术后1个月、3个月、6个月复查有无下肢DVT。应用WOMAC指数比较三组治疗前后膝关节功能。结果局部应用组、静脉应用组和对照组患者术后引流量[(182.54±41.05) mL vs (265.77±50.61) mL vs (355.64±52.06) mL]及总失血量[(891.04±151.28) m L vs (1006.33±157.91) mL vs (1121.28±162.42) mL]比较,局部应用组、静脉应用组明显低于对照组,差异均有统计学意义(P<0.05);局部应用组、静脉应用组和对照组患者第1天[(113.54±11.72) g/L vs (105.72±10.08) g/L vs (90.82±9.88) g/L]、第3天[(107.05±10.66) g/L vs (94.77±9.62) g/L vs (85.38±9.24) g/L]、第5天[(119.04±10.71) g/L vs (112.42±10.08) g/L vs (100.15±9.52) g/L] Hb水平比较,局部应用组和静脉应用组均明显高于对照组,并且局部应用组在第1天、第3天Hb水平明显高于静脉应用组,差异均有统计学意义(P<0.05);局部应用组、静脉应用组和对照组患者纤维蛋白原[(3.73±0.28) g/L vs (3.64±0.21) g/L vs (3.48±0.22) g/L]比较,局部应用组明显高于静脉应用组和对照组,静脉应用组明显高于对照组,差异均有统计学意义(P<0.05);三组患者术后行下肢静脉超声未查出深静脉血栓发生,随访6个月同样未查出下肢静脉血栓;局部应用组、静脉应用组和对照组患者术后WOMAC指数分别为37.5±2.6、36.7±2.2和35.8±3.4,差异无统计学意义(P>0.05)。结论局部应用氨甲环酸较静脉滴注更能够有效地减少患者手术失血量,阻止纤维蛋白原的降解,且不会增加下肢深静脉血栓发生,相对于静脉滴注效果更好。展开更多
基金supported by the National Key Research and Development Program of China(Grant Nos.2021YFA1401900,2019YFA0308403,and 2018YFA0305604)the Innovation Program for Quantum Science and Technology(Grant Nos.2021ZD0302602 and 2021ZD0302403)+1 种基金the National Natural Science Foundation of China(Grant Nos.92065104,12074010,and 11888101)Capacity Building for Sci-Tech Innovation-Fundamental Scientific Research Funds(Grant Nos.20530290057 and KM202010028014)。
文摘Novel electron states stabilized by Coulomb interactions attract tremendous interests in condensed matter physics.These states are studied by corresponding phase transitions occurring at extreme conditions such as mK temperatures and high magnetic field.In this work,we introduce a magneto-optical Kerr effect measurement system to comprehensively explore these phases in addition to conventional transport measurement.This system,composed of an all-fiber zero-loop Sagnac interferometer and in situ piezo-scanner inside a dilution refrigerator,operates below 100 m K,with a maximum field of 12 Tesla and has a resolution as small as 0.2μrad.As a demonstration,we investigate TbMn_(6)Sn_(6),where the manganese atoms form Kagome lattice that hosts topological non-trivial Dirac cones.We observed two types of Kerr signals,stemming from its fully polarized ferromagnetic ground state and positive charged carriers within the Dirac-like dispersion.
文摘目的探讨氨甲环酸局部注入和静脉应用对膝关节置换术患者术后失血量和凝血功能的影响。方法选取2017年2月至2018年5月深圳市人民医院收治的120例拟行膝关节置换术患者为研究对象,根据随机数表法将患者分为局部应用组38例、静脉应用组42例和对照组40例。局部应用组患者在行膝关节置换术成功后放置引流管并缝合关节囊,夹闭引流管4 h后通过引流管注入氨甲环酸;静脉应用组患者在术毕缝合切口前静脉滴注氨甲环酸10 mg/kg;对照组在术毕缝合切口前静脉滴注同等剂量的0.9%氯化钠溶液并不夹闭引流管。比较三组患者术后血红蛋白(Hb)水平和纤维蛋白原浓度以及凝血酶原时间、活化部分凝血活酶时间,并通过容积法计算患者术中出血量、术后引流量、隐性失血量、总失血量,于术后1周行双下肢静脉超声检查是否存在下肢深静脉血栓(DVT),于术后1个月、3个月、6个月复查有无下肢DVT。应用WOMAC指数比较三组治疗前后膝关节功能。结果局部应用组、静脉应用组和对照组患者术后引流量[(182.54±41.05) mL vs (265.77±50.61) mL vs (355.64±52.06) mL]及总失血量[(891.04±151.28) m L vs (1006.33±157.91) mL vs (1121.28±162.42) mL]比较,局部应用组、静脉应用组明显低于对照组,差异均有统计学意义(P<0.05);局部应用组、静脉应用组和对照组患者第1天[(113.54±11.72) g/L vs (105.72±10.08) g/L vs (90.82±9.88) g/L]、第3天[(107.05±10.66) g/L vs (94.77±9.62) g/L vs (85.38±9.24) g/L]、第5天[(119.04±10.71) g/L vs (112.42±10.08) g/L vs (100.15±9.52) g/L] Hb水平比较,局部应用组和静脉应用组均明显高于对照组,并且局部应用组在第1天、第3天Hb水平明显高于静脉应用组,差异均有统计学意义(P<0.05);局部应用组、静脉应用组和对照组患者纤维蛋白原[(3.73±0.28) g/L vs (3.64±0.21) g/L vs (3.48±0.22) g/L]比较,局部应用组明显高于静脉应用组和对照组,静脉应用组明显高于对照组,差异均有统计学意义(P<0.05);三组患者术后行下肢静脉超声未查出深静脉血栓发生,随访6个月同样未查出下肢静脉血栓;局部应用组、静脉应用组和对照组患者术后WOMAC指数分别为37.5±2.6、36.7±2.2和35.8±3.4,差异无统计学意义(P>0.05)。结论局部应用氨甲环酸较静脉滴注更能够有效地减少患者手术失血量,阻止纤维蛋白原的降解,且不会增加下肢深静脉血栓发生,相对于静脉滴注效果更好。
