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麻醉使二氧化碳对机械通风小鼠的淋巴脑脊髓液动力学影响变得麻木

Niklas Daniel Åke Persson¹, Terhi J Lohela², Kristian Nygaard Mortensen³

¹Center for Translational Neuromedicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Individualized Drug Therapy Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland; Department of Pharmacology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.

|May 24, 2024

概括

麻醉剂胺 - 德克斯米胺 (K/DEX) 和异氨酸对脑脊液 (CSF) 的动态有不同的影响,取代了二氧化碳的调节作用. K/DEX在高头中保持了CSF流动,而异黄在高通风时没有增强CSF流动.

科学领域:

神经科学是一个神经科学.
麻醉学麻醉学
脑脊液动力学脑脊液动力学

背景情况:

缺陷的淋巴清除有助于大脑胀和神经退行.
麻醉剂可以通过影响血管运动度来改变脑脊液 (CSF) 周围血管流动.
了解麻醉和CO2对CSF动态的影响对于管理大脑疾病至关重要.

研究的目的:

调查麻醉方案 (胺 - 德克斯米德提米丁与异氨酸) 和二氧化碳水平如何影响脑脊液的分布.
为了确定围动脉空间调制对不同麻醉条件下的CSF动态的影响.

主要方法:

雌性大鼠被 subjected to varying end-tidal carbon dioxide (ETco2) 水平 (超,正常通风,高通风). 雌性大鼠被 subjected to varying end-tidal carbon dioxide (ETco2) 水平 (超,正常通风,高通风). 雌性大鼠被 subjected to varying end-tidal carbon dioxide (ETco2) 水平 (高,正常通风,高通风). 雌性大鼠被 subjected to varying end-tidal carbon dioxide (ETco2) 水平.
放射性标记的CSF标记物分布被评估使用单光子发射断层扫描在胺-德克斯米德托米丁 (K/DEX) 和异氨酸麻醉下.
使用磁共振成像测量了CSF体积变化.

主要成果:

在正常通风下,K/DEX与异黄相比显示出更高的皮质CSF标记器输液,更大的周血管空间和增加的内CSF体积.
异氨酸麻醉指向系统循环的追踪剂.
超大头症没有影响内标志物分布或CSF体积在K/DEX下;高通风在isoflurane下增加了周血管空间,但没有影响CSF输液.

结论:

胺 - 德克斯梅德托米丁 (K / DEX) 和异氨酸麻醉会取代二氧化碳对CSF流量的调节作用.
在超时,K/DEX可以保持CSF空间和动态.
在异氨酸下进行的高通风在增加脑中脑液输液方面是无效的.

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