左右肘静脉注射对比剂对主动脉CT血管成像效果的对比研究

Comparative Study on the Effect of Left and Right Elbow Intravenous Injection of Contrast Agent on Aortic CT Angiography

目的 对比分析经左或右肘静脉注射对比剂对主动脉CT血管成像(CT angiography,CTA)效果的影响。方法 将64例临床疑诊主动脉疾病需行主动脉CTA检查的患者随机分为经右肘静脉注射对比剂组(A组)和经左肘静脉注射对比剂组(B组),每组32例。比较两组间主动脉弓水平、腹腔干开口上方1cm范围内、主动脉分叉上方1cm范围内和全主动脉的平均CT值以及图像质量的评价。结果 A、B两组主动脉弓水平平均CT值分别为428.00±81.57、326.06±64.77,腹腔干开口上方1cm范围内平均CT值分别为427.50±75.49、352.34±71.05,主动脉分叉上方1cm范围内平均CT值分别为431.78±93.35、360.59±66.90,全主动脉平均CT值分别为429.09±79.41、358.33±63.42;A组的图像质量优良率为100%,B组为81.3%;A组的主动脉CT值及图像质量评价均高于B组,差异具有统计学意义(P<0.05)。结论 相较经左肘静脉注射对比剂,经右肘静脉注射对比剂可以有效提高主动脉管腔内对比剂浓度,从而有助于提高主动脉CTA的成功率及图像质量。

Objective To compare and analyze the effect of intravenous injection of contrast medium through left or right elbow on aortic CT angiography.Methods A total of 64 patients with suspected aortic diseases requiring aortic CTA examination were randomly divided into right elbow vein injection contrast agent group(group A)and left elbow vein injection contrast agent group(group B),32 cases in each group.The average CT value and image quality of aortic arch level,the 1 cm above celiac trunk opening,thel 1 cm above aortic bifurcation and whole aorta were compared between the two groups.Results The average CT values of aortic arch level in group A and group B were 428.00±81.57 and 326.06±64.77,respectively.The average CT values of 1cm above celiac trunk opening were 427.50±75.49 and 352.34±71.05,respectively.The average CT values of 1cm above aortic bifurcation were 431.78±93.35 and 360.59±66.90,respectively.The average CT values of whole aorta were 429.09±79.41 and 358.33±63.42,respectively.The excellent and good rate of image quality in group A was 100%,and that in group B was 81.3%.The aortic CT value and image quality evaluation in group A were higher than those in group B,and the difference was statistically significant(P<0.05).Conclusion Compared with intravenous injection of contrast medium through left elbow vein,intravenous injection of contrast medium through right elbow vein can effectively increase the concentration of contrast medium in aortic lumen,which is helpful to improve the success rate and image quality of aortic CTA.