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Stroke:天坛医院:新弥散成像评分,可有效预测急性基底动脉狭窄预后

2021-09-10 Freeeman MedSci原创

在血管内治疗后的急性基底动脉闭塞患者中,治疗前基于扩散加权成像的PMT评分对临床结果显示出良好的预后价值

急性基底动脉闭塞(BAO)是一种灾难性的医疗状况,占所有缺血性中风的1%,占大血管闭塞中风的5%。最近的试验表明,机械血栓切除术是治疗前循环大血管闭塞引起的急性缺血性脑卒中的一种安全有效的方法。然而,对于急性BAO患者,在以前的临床试验中没有显示出血管内治疗(EVT)的压倒性优势。

在BEST试验(急性基底动脉闭塞症。血管内介入与标准医疗的比较),Liu等人发现,没有证据表明在90天内,不同治疗方法的参与者中,改良的Rankin量表(mRS)评分为0至3分的比例有差异。

在BASILAR试验(EVT治疗急性基底动脉闭塞研究)中,作者发现EVT与90天mRS评分≤3的比例明显较高;尽管如此,这项试验是单臂设计,选择偏差是不可避免的。

在这两项试验中,后循环急性卒中预后早期计算机断层扫描(CT)评分(pc-ASPECTS)被用作影像学标记,但没有明确描述pc-ASPECTS是通过哪种设备(CT或磁共振[MR]成像[MRI])评估。不明确的成像选择可能是结果令人失望的一个重要原因。

藉此,背景天坛医院的Lian Liu等人,根据临床经验和以前的文献,开发了一个新的基于扩散加权成像(DWI)的延髓-中脑(PM)和丘脑(PMT)评分。其研究的目的是通过在一个回顾性队列中与其他已建立的量表进行比较来评估PMT评分的预后价值。

他们对因急性基底动脉闭塞而接受血管内治疗的符合条件的患者进行回顾。PMT评分是一个基于弥散加权成像的半定量评分,其中充分考虑了延髓、中脑和丘脑的梗塞。

在评估PMT评分的同时,还评估了后循环急性中风预后早期计算机断层成像评分和脑干评分。良好的结果被定义为90天时改良的Rankin量表评分≤3分,以及成功的再灌注为脑梗塞溶栓2b/3级。用逻辑回归法评估了基线临床参数和良好结果之间的关联。

本队列中共有107名治疗前磁共振成像的患者被纳入。基线PMT评分(中位数[四分位数范围],3[1-5]对7[5-9];P<0.001)和脑干评分(中位数[四分位数范围],2[1-4]对3[2-5];P=0.001)在良好结局组中明显较低;

良好结局组中,后循环急性中风预后早期计算机断层成像评分较高,无统计意义。

ROC曲线分析结果显示,后循环急性卒中预后早期计算机断层扫描评分对良好预后的准确性较差(曲线下面积,0.60[95%CI,0.49-0.71];P=0.081);基线PMT评分对90天良好预后的准确性明显优于脑干评分和NIHSS量表(曲线下面积,0.80对0.68对0.78,P=0.003)。

此外,有利的PMT评分<7(几率比,22.0[95%CI,6.0-80.8],P<0.001),脑干评分<3(几率比,4.65[95%CI,2.05-10.55],P<0.001)和基线NIHSS量表<23(几率比,8.0[95%CI,2.5-25.6],P<0.001)都与良好结局的改善有关。

这个研究的重要意义在于发现了:在血管内治疗后的急性基底动脉闭塞患者中,治疗前基于扩散加权成像的PMT评分对临床结果显示出良好的预后价值。


Liu L, Wang M, Deng Y, et al. Novel Diffusion-Weighted Imaging Score Showed Good Prognostic Value for Acute Basilar Artery Occlusion Following Endovascular Treatment: The Pons-Midbrain and Thalamus Score. Stroke. Published online August 30, 2021. doi:10.1161/STROKEAHA.120.032314

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