摘要
目的探讨鉴别急性缺血性脑卒中机械取栓术后患者早期(24 h内)CT平扫所示脑实质高密度影(PTIH)为脑实质出血或对比剂外溢的影像学特征。方法回顾性分析77例急性大血管闭塞脑卒中接受机械取栓治疗后早期CT平扫显示脑实质内高密度影患者临床资料。根据术后24~48 h复查CT平扫结果分为脑实质出血组(n=38,43处)和单纯对比剂渗出组(n=39,47处)。观察早期CT平扫图像上机械取栓术后PTIH直接征象(位置分布、最大CT值、体积、密度混杂征)和间接征象(局部占位效应、脑室内高密度、蛛网膜下腔高密度)。采用t检验、Mann-Whitney秩和检验、卡方检验、Fisher精确检验及多因素logistic回归分析两组表现特征差异。结果脑实质出血组患者比对比剂渗出组患者更容易出现占位效应(28/38比9/39,P=0.003)及脑室内高密度(5/38比0/39,P=0.025)。新发PTIH灶90处中43处脑实质出血,47处对比剂渗出。进一步多因素logistic回归分析结果显示,脑实质出血组、对比剂渗出组间PTIH体积、密度混杂征判断实质脑出血差异有统计学意义(均P<0.05),OR值分别为2.93、9.24。PTIH体积诊断脑实质出血的最佳界值为9.3 cm^(3)。结论占位效应和脑室内高密度可作为判断新发PTIH为脑实质出血的间接征象。PTIH体积≥9.3 cm3和密度混杂征可作为诊断新发PTIH为脑实质出血的直接征象。
Objective To differentiate cerebral parenchymal hemorrhage from contrast extravasation based on the imaging characteristics of a high-density shadow within the brain parenchyma,which is demonstrated on early(within 24 hours)plain CT scan in patients with acute ischemic stroke after receiving mechanical thrombectomy(MT).Methods The clinical data of 77 patients with ischemic stroke caused by acute large-vessel occlusion,who received MT and whose early plain CT scan(performed within 24 hours after MT)showed a high-density shadow within the brain parenchyma,were retrospectively analyzed.According to the results of CT reexamination performed at 24-48 hours after treatment,the patients were divided into parenchymal hemorrhage group(n=38,43 sites)and pure contrast extravasation group(n=39,47 sites).The direct signs(including location distribution,maximum CT value,volume,mixed density sign)and the indirect signs(including local space-occupying effect,intraventricular high density,subarachnoid high density)of the post-thrombectomy intraparenchymal high-density(PTIH)shadow displayed on early CT images after MT were analyzed.The differences in imaging characteristics between the two groups were analyzed by using t-test,Mann-Whitney rank sum test,chi-square test,Fisher exact test and multivariate logistic regression analysis.Results The space-occupying effect(28/38 versus 9/39,P=0.003)and intraventricular high density lesion(5/38 versus 0/39,P=0.025)were more likely to occur in the parenchymal hemorrhage group than in the pure contrast extravasation group.The newly-developed 90 PTIH lesions included 43 parenchymal hemorrhage foci and 47 contrast extravasation foci.Multivariate logistic regression analysis showed that the differences in the PTIH volume and mixed density sign between the two groups were statistically significant(both P<0.05,OR=2.93 and OR=9.24 respectively).The optimal critical value of PTIH volume for diagnosing cerebral parenchymal hemorrhage was 9.3 cm^(3).Conclusion The space-occupying effect and intravent
作者
马圆
李沛城
李青松
史慧娟
刘一之
陈珑
MA Yuan;LI Peicheng;LI Qingsong;SHIHuijuan;LIU Yizhi;CHEN Long(Department of Interventional Radiology,First Afflliated Hospital of Soochow University,Suzhou,Jiangsu Province 215006,China)
出处
《介入放射学杂志》
CSCD
北大核心
2024年第8期829-833,共5页
Journal of Interventional Radiology
关键词
缺血性脑卒中
机械取栓术
CT平扫
脑出血
对比剂渗出
ischemic stroke
mechanical thrombectomy
plain CT scan
cerebral hemorrhage
contrast extravasation
