BJA:术后谵妄神经相关因素的队列研究:连接性和慢波活动的作用

2020-06-30 “罂粟花”微信号 “罂粟花”微信号

谵妄频频影响老年患者,并增加发病率和死亡率,然而,其发病机制尚不清楚。因此我们测试了认知分解模型,并提出慢波活动(SWA)增加引起的额顶叶连接性的破坏会导致谵妄。

背景与目的

谵妄频频影响老年患者,并增加发病率和死亡率,然而,其发病机制尚不清楚。因此我们测试了认知分解模型,并提出慢波活动(SWA)增加引起的额顶叶连接性的破坏会导致谵妄。

方 法

我们召集了70名手术患者进行术前和术后认知功能测试、脑电图、血液生物标记物和术前MRI检查。为了提供因果关系的证据,任何假定的机制都必须在谵妄的诊断上加以区分;根据谵妄的严重程度而成比例改变;并与引起谵妄的已知诱因、炎症相关。在适当的情况下,对分析进行多重校正(MCs)调整。

结 果

回顾分析发现,发生术后谵妄的受试者在手术之前,其弥散张量成像中α功率更高,α波段连接性增加(MC P<0.05),但结构连接性受损(径向扩散率增加;MC P<0.05)。这些连接效应是相互关联的(r2 =0.491; P=0.0012)。手术之后,额叶皮质区局部SWA不足以引起谵妄。相反,谵妄与累及枕顶叶和额叶皮质的SWA增加有关,并伴有功能连接的中断。连接性改变与SWA(r2=0.257; P<0.0001)、谵妄严重程度评级(r2=0.195; P<0.001)、白细胞介素10(r2=0.152; P=0.008)和单核细胞趋化蛋白1(r2=0.253; P<0.001)相关。

结 论

所有术后患者都出现了额叶SWA,但当SWA进展到累及后脑区域时,就会导致谵妄,大多数受试者的连接性也会相应降低。改善SWA和连接性可能为谵妄提供一种新的治疗方法。

原始出处:

Tanabe S, Mohanty R, Lindroth H, et al. Cohort study into the neural correlates of postoperative delirium: the role of connectivity and slow-wave activity.[J].Br J Anaesth,2020 Jun 1. pii: S0007-0912(20)30209-9. doi: 10.1016/j.bja.2020.02.027.

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