用静脉静脉外体膜氧化支持对心脏输出估计的评估:体外研究
概括
在静脉静脉外体膜氧化 (V-V ECMO) 期间监测心脏输出对于管理肺衰竭至关重要. 这项研究表明,Windkessel模型在V-V ECMO患者中准确估计心脏输出,有助于早期发现心脏功能障碍.
科学领域:
- 心血管生理学心血管生理学
- 关键护理医学 关键护理医学
- 生物医学工程 生物医学工程
背景情况:
- 右心室功能障碍在耐火性肺衰竭患者中很常见,需要静脉静脉外体膜氧化 (V-V ECMO).
- 持续的心脏输出监测可以帮助早期诊断腹腔功能障碍,并确保V-V ECMO期间足够的组织氧化.
- 目前用于测量V-V ECMO患者心脏输出量的方法由于研究有限,缺乏临床接受.
研究的目的:
- 用脉冲轮分析算法在模拟循环中评估心脏输出估计的性能,模拟与V-V ECMO相关的各种心血管疾病.
- 为了比较三种不同的脉冲轮分析算法的准确性:Windkessel模型,Windkessel与电阻电容 (RC) 延迟和Liljestrand-Zander模型.
主要方法:
- 实验室模拟循环循环被用于模拟各种心血管疾病,包括右心室收缩率的变化,肺血管阻力,V-V ECMO流量和大动脉合规性.
- 心脏输出在模拟循环中直接测量,作为比较的黄金标准.
- 测试了三个脉冲轮分析算法:Windkessel模型,Windkessel与RC延迟,以及Liljestrand-Zander模型.
主要成果:
- 风模型和RC延迟的风显示出强烈的相关性 (R2:分别为0.79和0.82),偏差最小,误差低 (分别为0.00±0.29和0.00±0.26).
- 在Liljestrand-Zander模型中表现出弱相关性 (R2:0.32) 和显著更高的误差 (0.00 ± 0.48).
- 这些发现表明,在模拟V-V ECMO条件下估计心脏输出时,基于风模型的性能优越.
结论:
- 风模型和RC延迟的风适合于V-V ECMO支持的患者的持续心脏输出监测.
- 在动物和人类研究中进行临床验证是有必要的,以证实这些体外发现.
- 精确的心脏输出监测可以增强V-V ECMO患者的临床决策,可能降低发病率和死亡率.
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