冠状动脉及心脏瓣膜钙化与慢性肾疾病的相关性

目的探讨慢性肾脏疾病（CKD）患者心脏瓣膜及冠状动脉钙化与肾小球滤过率估计值（eGFR）的相关性及其影响因素。方法收集接受心脏MSCT检查的CKD 3-5期患者212例,采用Smart Score 4.0自动分析软件测量冠状动脉和瓣膜钙化积分,采用直线回归分析检验心脏瓣膜及冠状动脉钙化与eGFR的相关性,采用多元线性回归分析检验影响心脏瓣膜及冠状动脉钙化的独立影响因素。结果 CKD患者冠状动脉钙化积分和心脏瓣膜钙化积分与eGFR均呈负相关（r=-0.182、-0.128,P均〈0.05）;年龄、eGFR、胆固醇及血磷是CKD患者冠状动脉钙化的独立影响因素,年龄、eGFR及脉压差是CKD患者心脏瓣膜钙化的独立影响因素。结论心脏瓣膜及冠状动脉钙化与CKD相关,其中eGFR是心脏瓣膜及冠状动脉的独立影响因素。

Computational Simulation of Complex Structure Fancy Yarns

A study is reported for mathematical model and simulative of complex structure fancy yams. The investigated complex structure fancy yams have a multithread structure composed of three components core, effect, and binder yams. In current research the precondition was accepted that the cross-sections of the both two yams of the effect intermediate product in the complex structure fancy yam remain the circles shaped, and this shape does not change during manufacturing of the fancy yam. Mathematical model of complex structure fancy yarn is established based on parameter equation of space helix line and computer simulative is further carried out using the computational mathematical tool Matlab 6.5. Theoretical structure of fancy yam is compared with an experimental sample. The simulative system would help for further the set of informative in designing of new assortment of the complex structure fancy yarns and prediction of visual effects of fancy yams in end-use fabrics.