血管流动的锥度角影响问题（综述）

血管流动的锥度角影响问题（综述）@岑人经@吴效明@刘肖珩...     

心血管生理信号特征提取的小波分析

心血管生理信号特征提取的小波分析@吴效明@岑人经@陈正宗...     

冠脉入口区域血液流动分析

了解冠脉循环的正常生理及冠心病的成因,具有重要的医学意义.本文应用流体力学方法对冠脉入口区域的血液流动进行了分析.在假定血液是不可压缩的牛顿流体、冠脉是弹性圆管的情况下,求得了冠脉入口区域的压力分布、速度分布和管壁的轴向位移、径向位移公式.结果表明,作为弹性管的冠脉入口区域的血液运动的压力、速度分布,可以沿用刚性管的结果,冠脉血流的特征表现在管壁运动.对冠脉来说,管壁运动的轴向位移是重要的,因而是不能忽略的.     

DEVELOPING FLOWS AND DEVELOPED FLOWS

This paper puts cmphasis on the problem of the developing flows in the circular tube under oscillatory conditions. According to the Navicr-Stokes' equations and using the method of Bessel function of imaginary argument, a system of formulsas is obtained. Comparing the formulas obtained in this paper with Atabek's formulas, it may, be seen that the former is simpler and more convenient. When both the formulas obtained in this paper and Atabek's formulas are reduced to the representation of developed flows, both of them are consistent. Numerical calculation results show that the computed results obtained in this paper are rather consistent with both Atabek's computed results and the experimental results.     

大血管中的血液流动 (一)刚性管情况

本文讨论了血液在大血管中的非定常振荡流动问题,导出了一组血液流动的速度分布、压力分布公式。分析表明,本文公式既适用于入口区域的流动,也适用于远离入口区域的流动;既可描述定常流动,也可描述非定常的振荡流动。数值算例还表明,本文结果不但和已有的理论结果相一致,而且较之简单,并和实验结果相当吻合。     

圆锥形血管中的振荡发展流动

本文在小锥度角的假设下,研究了圆锥形血管的非定常振荡的发展流动问题.导得了相应的速度分布公式.分析表明,所有收缩的圆锥形血管的流动都是发展流动,而且锥度角对发展流动的影响随着锥度角的增大而增大.     

Developing flows and developed flows

This paper puts emphasis on the problem of the developing flows in the circular tube under oscillatory conditions. According to the Navier-Stokes' equations and using the method of Bessel function of imaginary argument, a system of formulas is obtained. Comparing the formulas obtained in this paper with Atabek's formulas, it may be seen that the former is simpler and more convenient. When both the formulas obtained in this paper and Atabek's formulas are reduced to the representation of developed flows, both of them are consistent. Numerical calculation results show that the computed results obtained in this paper are rather consistent with both Atabek's computed results and the experimental results.     

缺血区心肌血管网阻抗和顺应性时相变化的建模与仿真研究

为研究缺血程度和在舒张期提高灌注压对缺血区血管网阻抗和顺应性时相变化的影响,利用一个包括正常心肌和缺血心肌的左心室壁血流灌注计算机仿真模型,6条雄性犬的左心室压和主动脉压的实测数据作为输入进行仿真．结果表明,缺血区血管网中各单元阻抗和顺应性随缺血程度的加重而上升;体外反搏对阻抗和顺应性的作用与缺血程度降低一致．     

支气管动脉介入治疗中脊髓损伤病例分析

通过对284例次的肺癌支气管动脉介入治疗的方法和疗效的分析,详细论述了脊髓损伤,尤其是高位截瘫并发症的成因及预防方法,为肺癌支气管动脉介入治疗的安全化、规范化打下了基础.