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Anesthesiology:怎样的通气策略能提高沙滩椅体位手术患者的rSO2

2015-08-15 MedSci MedSci原创

已有文献报道,沙滩椅体位麻醉后的灾难性神经损伤是由于脑灌注不足导致的。脑区域氧合饱和度(rSO2)的测量已经被用于常规临床实践当中,可用于检测进行心脏和血管手术的患者在潜在的低灌注状态下的脑氧饱和度的下降。科研人员已经对沙滩椅体位麻醉患者的rSO2监测进行了评估,结果显示该体位的患者脑氧饱和度的下降的发病率较高(rSO2≥20%低于基线)。通过测量氧合血红蛋白及还原血红蛋白的相对浓度,脑近红外光谱

已有文献报道,沙滩椅体位麻醉后的灾难性神经损伤是由于脑灌注不足导致的。大脑氧合饱和度(rSO2)的测量已经被用于常规临床实践当中,可用于检测进行心脏和血管手术的患者在潜在的低灌注状态下的脑氧饱和度的下降。科研人员已经对沙滩椅体位麻醉患者的rSO2监测进行了评估,结果显示该体位的患者脑氧饱和度下降的发病率较高(rSO2≥20%低于基线)。通过测量氧合血红蛋白及还原血红蛋白的相对浓度,脑近红外光谱(NIRS)可对视野范围内的脑氧供需平衡进行评估。据报道,在无血管疾病的有意识的志愿者及麻醉患者中进行的研究表明,rSO2与吸入氧含量(FIO2)及呼气末二氧化碳浓度(PETCO2)相关。然而,FIO2,PETCO2及麻醉选择之间的相互作用所导致的脑氧合代谢的改变,还未在沙滩椅体位的麻醉患者中进行充分评估。我们猜测FIO2,PETCO2的调节可以导致沙滩椅体位的麻醉患者rSO2的显著改变。
这是一项前瞻介入性组内研究,56例进行肩关节手术的患者在手术中采取沙滩椅体位。患者随机接受地氟醚或丙泊酚静脉麻醉。在麻醉诱导和固定患者手术体位后,对所有患者的FIO2和每分通气量顺序的进行调整。主要终点为rSO2,并且在每五个设置点被记录一次。




在将FIO2维持在0.3mmHg,PETCO2 维持在30mmHg时,采取沙滩椅体位后rSO2从68%(SD,12)减少到61%(SD,12)(P<0.001)。将FIO2增加至1.0mmHg,PETCO2 增加至45mmHg的综合干预措施,使沙滩椅体位麻醉患者的rSO2提高了14个百分点达到75%(SD,12)(P <0.001)。麻醉的研究介入点间没有显著的交互效应。



本研究表明:FIO2及PETCO2的增加可导致rSO2的显著增加,有利于克服沙滩椅体位麻醉患者脑氧饱和度下降的出现,同时这种作用不依赖麻醉药物的选择。

原始出处:

Paul Picton,Ch.B.,M.R.C.P.,etal. Influence of Ventilation Strategies and Anesthetic Techniques on Regional Cerebral Oximetry in  the Beach Chair Position. Anesthesiology. Aug 5 2015 

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    2016-09-15 1e10c84am36(暂无匿称)

    文章不错,值得拜读

    0

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    2015-08-17 skhzy
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