目的:分析探讨不同品牌输液管道对输液泵在运行过程中的阻塞压力、流速等参数的影响因素。方法:采用美国Fluke IDA 4 Plus型多通道输液设备分析仪,对三种不同品牌的输液泵采用不同的输液管道分别进行检测,得到多组实验数据,并对输液泵...目的:分析探讨不同品牌输液管道对输液泵在运行过程中的阻塞压力、流速等参数的影响因素。方法:采用美国Fluke IDA 4 Plus型多通道输液设备分析仪,对三种不同品牌的输液泵采用不同的输液管道分别进行检测,得到多组实验数据,并对输液泵所检测的阻塞压力、流速等参数进行数据分析。结果:不同的输液泵采用不同品牌的输液管道,对阻塞压力影响范围较小,且通过对输液流量数据分析,得出所测流速尽管与设置测量值有较大差距,但总体趋于稳定,均符合质量控制标准,并在一小范围内上下浮动。结论:每种输液泵采用匹配品牌的输液管道,才能在临床输液过程中保证流速更加精确,而输液泵的质量控制检测数据可以为临床科室正确的输液提供数据参考。展开更多
The structure and physical properties of carbon nanotubes have been investigated by using in situ high pressure energy dispersive x-ray diffraction with synchrotron radiation at pressures up to 50.7 GPa.At atmospheric...The structure and physical properties of carbon nanotubes have been investigated by using in situ high pressure energy dispersive x-ray diffraction with synchrotron radiation at pressures up to 50.7 GPa.At atmospheric pressure,the structure of carbon nanotubes is similar to the hexagonal close-packed lattice of graphite with the interplanar spacing of the diffraction line(002)d002=0.3404 nm and that of the line(100)d100=0.2116 nm.According to the high pressure x-ray diffraction results,the diffraction line(002)is broadened and weakened above 8 GPa,and carbon nanotubes become partly amorphous.When the pressures of 10 and 20 GPa are decreased down to zero,the diffraction line(002)is partly recovered.While at the maximum pressure of 50.7 GPa,they entirely become amorphous and this amorphous transition is irreversible.We used the equation of state of Birch-Murnaghan to fit the P-V data of carbon nanotubes and obtained the bulk modulus K0=54.3±3.2 GPa(at K'0=4.0).展开更多
文摘目的:分析探讨不同品牌输液管道对输液泵在运行过程中的阻塞压力、流速等参数的影响因素。方法:采用美国Fluke IDA 4 Plus型多通道输液设备分析仪,对三种不同品牌的输液泵采用不同的输液管道分别进行检测,得到多组实验数据,并对输液泵所检测的阻塞压力、流速等参数进行数据分析。结果:不同的输液泵采用不同品牌的输液管道,对阻塞压力影响范围较小,且通过对输液流量数据分析,得出所测流速尽管与设置测量值有较大差距,但总体趋于稳定,均符合质量控制标准,并在一小范围内上下浮动。结论:每种输液泵采用匹配品牌的输液管道,才能在临床输液过程中保证流速更加精确,而输液泵的质量控制检测数据可以为临床科室正确的输液提供数据参考。
基金Supported by the Beijing Synchrotron Radiation Laboratory,Institute of High Energy Physics,Chinese Academy of Sciences.
文摘The structure and physical properties of carbon nanotubes have been investigated by using in situ high pressure energy dispersive x-ray diffraction with synchrotron radiation at pressures up to 50.7 GPa.At atmospheric pressure,the structure of carbon nanotubes is similar to the hexagonal close-packed lattice of graphite with the interplanar spacing of the diffraction line(002)d002=0.3404 nm and that of the line(100)d100=0.2116 nm.According to the high pressure x-ray diffraction results,the diffraction line(002)is broadened and weakened above 8 GPa,and carbon nanotubes become partly amorphous.When the pressures of 10 and 20 GPa are decreased down to zero,the diffraction line(002)is partly recovered.While at the maximum pressure of 50.7 GPa,they entirely become amorphous and this amorphous transition is irreversible.We used the equation of state of Birch-Murnaghan to fit the P-V data of carbon nanotubes and obtained the bulk modulus K0=54.3±3.2 GPa(at K'0=4.0).
