Stroke:参考这个指标,就可以帮助评价急性脑梗塞患者该不该再灌注治疗!

2020-03-03 shaosai MedSci原创

本研究旨在通过比较扩散加权成像(DWI)和相对血流量(rCBF)评价梗死核心的空间和体积重缺陷,评价其是否有助于患者行再灌注治疗分类。

背景和目的

本研究旨在通过比较扩散加权成像(DWI)和相对血流量(rCBF)评价梗死核心的空间和体积重缺陷,评价其是否有助于患者行再灌注治疗分类。

方法

本研究共纳入了193例患者,共有119例在发病24小时内行急性磁共振成像,其中包括DWI和关注成像。梗死核心定义为利用rCBF(<0.20-<0.44)减少分为12个阈值并与表观扩散系数(<620 10-6mm2/s)向比较来评估体积大小。对于每一个阈值,利用Bland-Altman、相关和线性回归分析评价体积大小的一致性。利用ROC曲线来评价空间形态一致性。

结果

以0.32为rCBF的阈值,rCBF与DWI间的平均绝对体积差异最小(14.7 mL)、具有最佳的线性回归拟合度(R2=0.84)以及最佳的空间形态(约登指数, 0.38; 95% CI, 0.34-0.41)一致性,两者相关性高(r=0.91, P<0.05)且具有较小的平均体积差异(1.3 mL),无固定偏倚(P<0.05)。在此阈值上,有110/119(92.4%)例患者能够被准确分类,以70mL为行取栓术的体积截点。预测大梗死(>70 mL)的空间形态一致性要由于小梗死灶(≤70 mL),约登指数分别为0.53 (95% CI, 0.49-0.56)、0.34 (95% CI, 0.30-0.37)。

结论

本研究表明,急性脑卒中DWI和rCBF评价梗死坏死核心具有很强的相关性和很好的一致性,rCBF能够有效地准确评估并对需要再灌注治疗的患者进行分类。最佳rCBF截断值为0.32可媲美当前临床使用的参考指标。

原始出处:


Amukotuwa S, Straka M, Aksoy D, et al,Cerebral Blood Flow Predicts the Infarct Core: New Insights From Contemporaneous Diffusion and Perfusion Imaging.Stroke. 2019.DOI:10.1161/STROKEAHA.119.026640

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    2020-03-05 huagfeg
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    2020-03-05 karmond
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