永存三叉动脉的多层螺旋CT诊断

Multislice Spiral CT Diagnosis of Persistent Trigeminal Artery

目的探讨多层螺旋CT血管成像(CTA)在诊断永存三叉动脉(PTA)中的价值。资料与方法回顾性分析2546例行头颅64层螺旋CTA检查者中的10例PTA患者的影像学资料,分析PTA的发生率、起源、走行、后循环供血及合并其他血管畸形的情况。结果 (1)PTA的发生率为0.39%(10/2546),其中1例位于右侧,9例位于左侧。(2)三叉动脉均起自颈内动脉海绵窦段,血管走行外侧型8例,中央型2例;按Saltzman分型显示PTA后循环供血情况:Ⅰ型7例,Ⅱ型1例,Ⅲ型2例。(3)吻合点近端的基底动脉及双侧椎动脉发育不良7例。结论 64层CTA能清晰、准确地显示PTA的走行及后循环供血情况。

Objective To assess the value of multislice spiral CT angiography in the diagnosis of persistent trigeminal artery.Materials and MethodsThe imaging data of 10 patients with persistent trigeminal artery in 2546 patients who received 64 slice CTA of craniocervical arteries were analyzed retrospectively.The incidence,origin,running,and blood supply from posterior circulation of persistent trigeminal artery,and its complicated other vascular malformations were analyzed.Results（1）The incidence of persistent trigeminal artery was 0.39%（10/2546）.One of them was on the right side and nine were on the left side.（2）All the trigeminal arteries originated from the cavernous segment of internal carotid artery.Eight patients were lateral type and two patients were central type.According to Saltzman＇s classification about the blood supply from posterior circulation：seven patient was Saltzman type Ⅰ,one was type Ⅱ,and two were type Ⅲ.（3）Seven patients had basilar artery and bilateral vertebral artery hypoplasia at the point of proximal anastomosis.Conclusion64 slice CTA can clearly display the running route of persistent trigeminal artery and its blood supply of posterior circulation.