Riolan动脉弓的CTA影像表现

Arc of Riolan on CT angiography

目的:分析多层面螺旋CT血管造影(CTA)对Riolan动脉弓的影像诊断价值。材料和方法:回顾性分析2004年10月～2006年2月腹部大血管病变行CTA检查,合并有Riolan动脉弓显示的病例共14例。男9例,女5例,年龄19～80岁,平均52.1岁。8例男性患者有动脉硬化和/或高血压病史,1例男性患者为先天性腹主动脉缩窄;5例女性患者均有多发性大动脉炎病史。结果:14例中腹主动脉闭塞7例,肠系膜上动脉闭塞2例、狭窄7例、正常5例。肠系膜下动脉闭塞6例、狭窄3例、正常5例。Riolan动脉弓直径为4～10mm,平均6.9mm。结论:Riolan动脉弓的出现通常提示肠系膜上或下动脉出现了严重的狭窄或闭塞,多层面螺旋CT血管造影不仅可以清晰的显示Riolan动脉弓,而且可以很好显示相关血管狭窄与闭塞情况,对临床治疗方案有重要参考价值。

Objective： To evaluate the CT angiography（CTA） in demonstrating the arc of Riolan. Materials and Methods： Fourteen cases with the arc of Riolan were analyzed retrospectively. Among them, there were 9 male and 5 female patients, aged from 19 to 80 years （averaged 52.1 years）. Five females suffered from Takayasu＇s arteritis, while eight males had atherosclerosis and/or hypertension, one young male suffered from abdominal aortic coarctation. Results： Abdominal aorta occlusions were demonstrated in seven cases. SMA occlusions were found in two, seven cases showed stenosis, and five eases were normal. IMA occluded in six patients, stenosed in three cases, normal in five cases. The calibers of Riolan＇s arc were 4 to 10mm, with an average of 6.9mm. Conclusion： The axe of Riolan can be demonstrated by CTA among those suffered from multiple abnormalities in abdominal vessels, and represents a significant stenosis or occlusion somewhere in mesenteric circulation. It is valuable for treatment procedures.