目的：评估CT血管造影（CT angiography，CTA）的影像学特征对不同部位急性颈内动脉（Internal carotid artery，ICA）闭塞的诊断效果。方法：回顾性分析2012年1月—2016年12月在我院就诊的不同部位急性ICA闭塞患者的临床特征和影像学特点，并进行比较。利用受试者工作特征（Receiver operating characteristic，ROC）曲线来评价CTA对不同部位ICA闭塞的诊断效果，共探讨了五种诊断方式，分别为：①根据CTA确定的颈动脉闭塞残端形状诊断；②根据CTA确定的颈动脉钙化情况诊断；③根据CTA确定的Willis环闭塞形状诊断；④根据CTA确定的软脑膜侧支循环（Leptomeningeal collaterals，LMC）状态诊断；⑤综合前四种诊断方式的联合诊断。利用多因素Logistic回归分析急性ICA闭塞患者短期预后不良的危险因素。结果：本研究共纳入161例患者，分为三组：C1颈段闭塞患者56例，C4海绵窦段闭塞患者72例，C6眼段或C7交通段闭塞患者33例。各组相比，越远端的闭塞部位，发病时神经功能缺损的程度越严重，梗死体积越大，比较差异具有统计学意义（P＜0.05）；闭塞部位与脑梗死发生的病因、脑梗死后并发症的发生以及患者的预后有关（P＜0.05）。不同ICA闭塞部位患者的CTA成像特征也不同（P＜0.05）。ROC曲线显示，结合了颈动脉闭塞残端的形状、颈动脉钙化情况、Willis环的闭塞形状和LMC状态特征的联合诊断取得了最优的诊断效果，对C1颈段闭塞、C4海绵窦段闭塞、C6眼段或C7交通段闭塞诊断的ROC曲线下面积分别为0.966，0.878，0.902。年龄较大和ICA远端闭塞是预后不良的危险因素。结论：ICA闭塞的临床表现和CTA影像学表现均与闭塞部位有关，利用CTA提示的颈动脉闭塞残端的形状、颈动脉钙化情况、Willis环的闭塞形状和LMC状态特征的联合诊断方法可有效地对不同部位的急性ICA闭塞进行诊断，值得在临床上广泛推广。
Abstract
Objective: To evaluate the diagnostic effect of characteristic CT angiography(CTA) patterns on the internal carotid artery(ICA) occlusion in different parts. Methods: The clinical characteristics and imaging characteristics of patients with acute ICA occlusion were analyzed retrospectively from January 2012 to December 2016 in our hospital. Diagnostic effect of characteristic CTA patterns on the ICA occlusion in different parts was evaluated using receiver operating characteristic(ROC) curve. The five diagnostic methods were: ①The carotid occlusion stump shape based on CTA; ②Carotid artery calcification based on CTA; ③The occlusion shape of Willis ring based on CTA; ④The leptomeningeal collaterals(LMC) based on CTA; ⑤The combined diagnosis of the above four diagnostic methods. Multivariate Logistic regression analysis of risk factors was also performed in patients with acute ICA occlusion with short-term poor prognosis. Results: A total of 161 patients were enrolled in this study, which were divided into three groups: 56 patients with C1 cervical segment occlusion, 72 patients with C4 cavernous segment occlusion, and 33 patients with C6 ophthalmic segment or C7 communicating segment occlusion. In the three groups of patients, the more distant the occlusion site was, the greater the degree of neurological deficit and the infarct volume were(P<0.05). The etiology of cerebral infarction, post-infarction complications and the prognosis of patients were related with the occlusion site(P<0.05). The imaging characteristics of CTA in patients with various parts of ICA occlusion were also different(P<0.05). ROC curve showed that the combined diagnosis of carotid artery occlusion stump shape, carotid artery calcification, the occlusion shape of Willis ring and LMC status was the best. The area under curve(AUC) for C1 cervical segment occlusion, C4 cavernous segment occlusion, C6 ophthalmic segment or C7 communicating segment occlusion were 0.966, 0.878, and 0.902, respectively. Older age and ICA distal occlusion were risk factors for poor prognosis. Conclusion: The clinical manifestations and CTA imaging findings of ICA occlusion are associated with occlusion location. The CTA-based combined diagnostic method can effectively differentiate the part of acute ICA occlusion, which is worthy to be widely promoted in the clinic.
关键词
颈内动脉 /
动脉闭塞性疾病 /
体层摄影术 /
X线计算机
Key words
Carotid artery, internal /
Arterial occlusive diseases /
Tomography, X-ray computed
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基金
河北省2011年医学科学研究重点课题计划（20110147）。
