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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(P<0.05)。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(P<0.05)。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。
Objective: To investigate the effects of contrast media on the quality of lower extremity arterial angiography (CTA). Methods: From June 2013 to October 2015 in our hospital suspected of lower extremity arterial embolism or stenosis CTA 80 patients were divided into groups A and B by random number table method in 40 cases. Patients in group A received 100 mL of prednisone at a rate of 5 mL / s and 50 mL of normal saline at a rate of 5 mL / s. In group B, 50 mL of prednisone was injected at a rate of 5 mL / s and 50 mL of prednisone at a rate of 2.5 mL / s. Finally, 50 mL of normal saline was injected at a rate of 5 mL / s. CTA images of the lower extremity arteries were compared between the two groups. Results: Compared with group A, CT values of different cross-sections in group B were stable (P <0.05). In the group B, the marginal grading of the arteries of the lower leg and the foot arteries, the evaluation of the grade of the blood vessel branches and the number of the segments showed significantly higher than those in the A group (P <0.05). CONCLUSION: Contrast agent injected at different rates can maintain contrast agent concentration in lower extremity artery at a stable and high level, which can improve CTA image quality of lower extremity artery and is worth popularizing in clinic.