稳定流动的左心室卸载优于脉动式的压力增大在静脉脉外体膜氧化支持期间的通风
Efrat M Goffer1, Kimberly K Lamberti1, Anna-Maria Spognardi2
1From the Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts.
概括
在心脏性休克中,静脉外体膜氧化 (VA-ECMO) 通过皮肤室辅助装置 (pVAD) 更好地支持左心室,而不是通过心脏内气球 (IABP). 这种组合可以改善心脏功能和输液.
科学领域:
- 心血管生理学心血管生理学
- 机械循环支持 机械循环支持
- 关键护理医学 关键护理医学
背景情况:
- 静脉外体膜氧化 (VA-ECMO) 提供了全身输液,但增加了左心室 (LV) 后负荷,可能阻碍恢复.
- 二次机械循环支持 (MCS) 装置与VA-ECMO一起用于改善 LV 功能,但它们的比较效果尚未完全理解.
- 了解不同MCS策略对LV血液动力学和 perfusion 的影响,对于优化心脏性休克患者的结果至关重要.
研究的目的:
- 量化VA-ECMO与静脉内气球 (IABP) 或皮肤内心室辅助装置 (pVAD) 结合对LV生理和 perfusion 的影响.
- 为了比较VA-ECMO/IABP与VA-ECMO/pVAD提供的血液动力学性能和末端器官输液,在急性心脏性休克的猪模型中.
主要方法:
- 在猪模型中,通过连续的左前下降动脉微珠栓塞引发了急性心脏性休克.
- 启动了VA-ECMO的支持,随后增加了IABP或pVAD.
- 在联合机械循环支持之前和之后,测量了血液动力学参数,LV压力-体积循环和动脉血流.
主要成果:
- 动脉内气球 (IABP) 降低了15%的LV末端透气压力,并略微增加了LV中风工作.
- 与IABP相比,皮肤穿透式心室辅助装置 (pVAD) 导致LV末端透气压 (>60%) 和LV中风 (>50%) 的降低更大.
- 与VA-ECMO一起使用时,pVAD与IABP相比显示出优异的冠状动脉输液和全身压力梯度.
结论:
- 与VA-ECMO和pVAD的联合支持显著改善了心血管状态,与VA-ECMO与IABP相比,在急性心脏病性休克中显著改善了心血管状态.
- 在这种情况下,pVAD在LV卸载,冠状动脉 perfusion 和系统压力梯度方面比IABP提供了更好的好处.
- 这些发现表明,VA-ECMO与pVAD相结合可能是支持心脏功能和末端器官输液的更有效策略.
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