对比剂注射方式对下肢动脉血管成像质量的影响

目的:探讨对比剂不同注射方式对下肢动脉血管成像(CTA)质量的影响。方法:选择2013年6月到2015年10月在我院怀疑下肢动脉栓塞或狭窄而行CTA检查的患者80例,按随机数字表法分为A、B两组,各40例。A组患者先以5 mL/s的速率注射100 mL优维显,后以5 mL/s的速率注射50 mL生理盐水。B组患者先以5 mL/s的速率注射50 mL优维显,后以2.5 mL/s的速率注射50 mL优维显,最后以5 mL/s的速率注射50 mL生理盐水。比较两组患者的下肢动脉CTA图像质量。结果:B组患者不同横断面CT值相比于A组较平稳(P0.05)。B组患者小腿动脉和足部动脉的边缘分级、血管分支等级评价及显示的节段数均明显高于A组(P0.05)。结论:对比剂以不同速率相结合的注射方式能够使下肢动脉血管中对比剂浓度维持在平稳且较高的水平,可以提高下肢动脉CTA图像质量,值得在临床上推广应用。

Influence of Different Contrast Material Injection Methods on the Quality of the Lower Extremity Artery Imaging

Objective:To investigate the influence of different contrast material injection methods on the quality of the lower extremity artery CT angiography (CTA).Methods:A total of 80 patients in our hospital suspected lower extremity artery thrombosis or stenosis and underwent CTA examination from June 2013 to October 2015 were enrolled in this study. The subjects were divided into A group (n=40) and B group (n=40) according to the random number table method. The patients of A group were firstly injected 100 mL Youweixian at a rate of 5 mL/s, then injected 50 mL saline at a rate of 5 ml/s.The patients of B group were firstly injected 50 mL Youweixian at a rate of 5 mL/s, then injected 50 mL Youweixian at a rate of 2.5 mL/s, finally injected 50 ml saline at a rate of 5 mL/s. The image quality of lower extremity artery CTA of the two groups were compared.Results:The CT values of different cross section levels in B group were relatively smoother than A group (P<0.05). The evaluation of edge classification, vascular branch grade and the displaied segment number of crus artery and foot artery in B group were significantly higher than A group (P<0.05).Conclusion:The injection method mixing with different rate can keep the concentration of contrast material at a stable and high level in the lower extremity artery,so as to improve the quality of lower limb artery CTA images,which is worthy of application in clinic.