【摘要】 目的 :探讨活体肺血管分支几何学和流动状态参数的特征。方法 :在 63例正常人胸部螺旋CT图像上测量2 0 1 0套两分支的血管横径 ,计算Z值和雷诺数 ,分析并判断不同横径血管内血液的流动状态。结果 :Z值与标本数据比较有显著不同 ;雷诺数随血管横径的增大而增大 ,但不超过 1 0 0 0。结论 :2～ 4mm的正常肺小血管内雷诺数 <1 0 0 0 ,流动为层流更多还原

【Abstract】 Objective:To explore the branching geometry and parameters of flowing condition of the pulmonary small vessels in vivo.Methods:2010 sets of dichotomous small pulmonary vessels were measured in chest helical CT of 63 normal cases.The value Z and the Renold number were calculated and participated to analysis the flowing condition in different vascular diameters. Results:Value Z showed different trend compared with the specimen;the Renold number calculated from Z went large with the vascular diameter,but not over 1000.Conclusion:In small pulmonary vessels of 2～4mm,the Renold number is less than 1000,which indicates the flowing condition in them is laminar flow.更多还原