目的:探讨重组人粒细胞集落刺激因子(G-CSF)联合左氧氟沙星或仅用G-CSF支持疗法在预防自体造血干细胞移植感染中的作用,分析移植患者住院时间、住院费用及移植后生存情况。方法:回顾性分析2012年1月至2022年7月于本院就诊的接受自体造...目的:探讨重组人粒细胞集落刺激因子(G-CSF)联合左氧氟沙星或仅用G-CSF支持疗法在预防自体造血干细胞移植感染中的作用,分析移植患者住院时间、住院费用及移植后生存情况。方法:回顾性分析2012年1月至2022年7月于本院就诊的接受自体造血干细胞移植的恶性血液病患者,观察自体造血干细胞移植期间左氧氟沙星+G-CSF预防感染组和G-CSF支持组中性粒细胞缺乏伴发热、细菌感染发生率及静脉抗菌药物使用情况,并比较两组住院时间、住院期间总费用及移植90天后存活情况。结果:102例患者纳入研究,其中多发性骨髓瘤54例,急性白血病36例,淋巴瘤7例,骨髓增生异常综合征3例,轻链型淀粉样变性1例,POEMS综合征1例。47例接受G-CSF+左氧氟沙星预防感染,55例接受G-CSF支持治疗。左氧氟沙星+G-CSF组中40例(85.11%)发生中性粒细胞缺乏伴发热,13例(27.66%)明确为细菌感染。G-CSF组中44例(80.00%)发生中性粒细胞缺乏伴发热,16例(29.09%)细菌感染。两组中性粒细胞缺乏伴发热和细菌感染发生率均无统计学差异(χ^(2)=0.46,P=0.50;χ^(2)=0.03,P=0.87)。左氧氟沙星+G-CSF组静脉抗菌药物使用率为85.11%(40/47),与G-CSF组的85.45%(47/55)比较无统计学差异(χ^(2)=0.04,P=0.84)。左氧氟沙星+G-CSF组与G-CSF组左氧氟沙星耐药菌的检出率分别为8.57%(3/35)和21.43%(6/28),无统计学差异(χ^(2)=0.65,P>0.05)。左氧氟沙星+G-CSF与G-CSF组患者住院中位时间为25 d vs 22 d,住院中位费用为78216.24元vs 80724.38元,差异均无统计学意义(t=3.00,P=0.09;t=0.94,P=0.09)。移植后90天内,左氧氟沙星+G-CSF组有2例(4.26%)死亡,G-CSF组有1例(1.82%)死亡,两组比较无统计学差异(χ^(2)=0.53,P=0.47)。结论:较G-CSF支持相比,患者在自体造血干细胞移植期间应用G-CSF+左氧氟沙星预防感染无明显获益。展开更多
The(Ca,R)FeAs_(2)(R=La,Pr,etc.)superconductors with a signature of superconductivity transition above 40 K possess a new kind of block layers that consist of zig-zag As chains.We report the electronic structure of the...The(Ca,R)FeAs_(2)(R=La,Pr,etc.)superconductors with a signature of superconductivity transition above 40 K possess a new kind of block layers that consist of zig-zag As chains.We report the electronic structure of the new(Ca,La)FeAs_(2)superconductor investigated by both band structure calculations and high resolution angle-resolved photoemission spectroscopy measurements.Band structure calculations indicate that there are four hole-like bands around the zone centerΓ(0,0)and two electron-like bands near the zone corner M(π,π)in CaFeAs_(2).In our angle-resolved photoemission measurements on(Ca0.9La0.1)FeAs_(2),we have observed three hole-like bands around theΓpoint and one electron-like Fermi surface near the M(π,π)point.These results provide important information to compare and contrast with the electronic structure of other iron-based compounds in understanding the superconductivity mechanism in the iron-based superconductors.展开更多
High quality single crystals of heavy Fermion CeCoIn_(5) superconductor have been grown by flux method with a typical size of(1-2)×(1-2)×(~0.1)mm^(3).The single crystals are characterized by structural analy...High quality single crystals of heavy Fermion CeCoIn_(5) superconductor have been grown by flux method with a typical size of(1-2)×(1-2)×(~0.1)mm^(3).The single crystals are characterized by structural analysis from x-ray diffraction and Laue diffraction,as well as compositional analysis.Magnetic and electrical measurements on the single crystals show a sharp superconducting transition with a transition temperature at T_(c,onset)~2.3 K and a transition width of~0.15 K.The resistivity of the CeCoIn_(5) crystal exhibits a hump at~45 K,which is typical of a heavy Fermion system.High resolution angle-resolved photoemission spectroscopy(ARPES)measurements of CeCoIn_(5) reveal clear Fermi surface sheets that are consistent with the band structure calculations when assuming itinerant Ce 4f electrons at low temperature.This work provides important information on the electronic structure of heavy Fermion CeCoIn_(5) superconductor.It also lays a foundation for further studies on the physical properties and superconducting mechanism of the heavy Fermion superconductors.展开更多
文摘目的:探讨重组人粒细胞集落刺激因子(G-CSF)联合左氧氟沙星或仅用G-CSF支持疗法在预防自体造血干细胞移植感染中的作用,分析移植患者住院时间、住院费用及移植后生存情况。方法:回顾性分析2012年1月至2022年7月于本院就诊的接受自体造血干细胞移植的恶性血液病患者,观察自体造血干细胞移植期间左氧氟沙星+G-CSF预防感染组和G-CSF支持组中性粒细胞缺乏伴发热、细菌感染发生率及静脉抗菌药物使用情况,并比较两组住院时间、住院期间总费用及移植90天后存活情况。结果:102例患者纳入研究,其中多发性骨髓瘤54例,急性白血病36例,淋巴瘤7例,骨髓增生异常综合征3例,轻链型淀粉样变性1例,POEMS综合征1例。47例接受G-CSF+左氧氟沙星预防感染,55例接受G-CSF支持治疗。左氧氟沙星+G-CSF组中40例(85.11%)发生中性粒细胞缺乏伴发热,13例(27.66%)明确为细菌感染。G-CSF组中44例(80.00%)发生中性粒细胞缺乏伴发热,16例(29.09%)细菌感染。两组中性粒细胞缺乏伴发热和细菌感染发生率均无统计学差异(χ^(2)=0.46,P=0.50;χ^(2)=0.03,P=0.87)。左氧氟沙星+G-CSF组静脉抗菌药物使用率为85.11%(40/47),与G-CSF组的85.45%(47/55)比较无统计学差异(χ^(2)=0.04,P=0.84)。左氧氟沙星+G-CSF组与G-CSF组左氧氟沙星耐药菌的检出率分别为8.57%(3/35)和21.43%(6/28),无统计学差异(χ^(2)=0.65,P>0.05)。左氧氟沙星+G-CSF与G-CSF组患者住院中位时间为25 d vs 22 d,住院中位费用为78216.24元vs 80724.38元,差异均无统计学意义(t=3.00,P=0.09;t=0.94,P=0.09)。移植后90天内,左氧氟沙星+G-CSF组有2例(4.26%)死亡,G-CSF组有1例(1.82%)死亡,两组比较无统计学差异(χ^(2)=0.53,P=0.47)。结论:较G-CSF支持相比,患者在自体造血干细胞移植期间应用G-CSF+左氧氟沙星预防感染无明显获益。
基金Supported by the National Natural Science Foundation of China under Grant No 10734120the National Basic Research Program of China under Grant Nos 2011CB921703 and 2011CB605903.
文摘The(Ca,R)FeAs_(2)(R=La,Pr,etc.)superconductors with a signature of superconductivity transition above 40 K possess a new kind of block layers that consist of zig-zag As chains.We report the electronic structure of the new(Ca,La)FeAs_(2)superconductor investigated by both band structure calculations and high resolution angle-resolved photoemission spectroscopy measurements.Band structure calculations indicate that there are four hole-like bands around the zone centerΓ(0,0)and two electron-like bands near the zone corner M(π,π)in CaFeAs_(2).In our angle-resolved photoemission measurements on(Ca0.9La0.1)FeAs_(2),we have observed three hole-like bands around theΓpoint and one electron-like Fermi surface near the M(π,π)point.These results provide important information to compare and contrast with the electronic structure of other iron-based compounds in understanding the superconductivity mechanism in the iron-based superconductors.
基金Supported by the National Natural Science Foundation of China under Grant No 10734120the National Basic Research Prograom of China under Grant No 2011CB921703.
文摘High quality single crystals of heavy Fermion CeCoIn_(5) superconductor have been grown by flux method with a typical size of(1-2)×(1-2)×(~0.1)mm^(3).The single crystals are characterized by structural analysis from x-ray diffraction and Laue diffraction,as well as compositional analysis.Magnetic and electrical measurements on the single crystals show a sharp superconducting transition with a transition temperature at T_(c,onset)~2.3 K and a transition width of~0.15 K.The resistivity of the CeCoIn_(5) crystal exhibits a hump at~45 K,which is typical of a heavy Fermion system.High resolution angle-resolved photoemission spectroscopy(ARPES)measurements of CeCoIn_(5) reveal clear Fermi surface sheets that are consistent with the band structure calculations when assuming itinerant Ce 4f electrons at low temperature.This work provides important information on the electronic structure of heavy Fermion CeCoIn_(5) superconductor.It also lays a foundation for further studies on the physical properties and superconducting mechanism of the heavy Fermion superconductors.
