研究出血和大动脉闭塞期间压力-体积关系的变化
Fahim Usshihab Mobin1,2,3, Antonio C Renaldo1,2,3, Enrique Carrasco Perez1
1Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston Salem, NC, United States.
Frontiers in cardiovascular medicine
|September 8, 2023
概括
这项研究引入了一种新的算法,用于分析左心室在出血和大动脉封闭期间的压力-体积循环. 这些发现表明,内血管变异性大动脉控制 (EVAC) 可能比复苏性内血管气球阻塞大动脉 (REBOA) 更好地保护心脏功能.
科学领域:
- 心血管生理学心血管生理学
- 血液动力学 血液动力学
- 心脏机械学 心脏机械学
背景情况:
- 左心室压力-体积 (P-V) 关系对于评估心脏功能至关重要.
- 传统的P-V循环分析仅限于单击或平均数据,阻碍了纵向评估.
- 需要在急性血液动力学事件 (如出血和大动脉闭塞) 期间评估P-V变化.
研究的目的:
- 为了研究左心室P-V关系在出血休克和大动脉闭塞期间的变化.
- 开发和验证一种用于量化纵向P-V循环变化的新算法.
- 为了比较复苏性内血管气球阻塞大动脉 (REBOA) 与内血管大动脉控制 (EVAC) 的心脏性能影响.
主要方法:
- 我们使用了猪类出血性休克模型.
- 猪经历了出血,其次是1区REBOA,EVAC,或没有闭塞.
- 连续的P-V循环数据和预负载独立的心脏指标是实时收集的.
主要成果:
- 在所有组中,出血显著降低了末压和体积.
- 复苏性内血管气球阻塞大动脉 (REBOA) 与内血管大动脉控制 (EVAC) 相比,导致心脏参数的变化显著增加.
- EVAC表现出较少的变化,这表明潜在的更健康的心脏性能维护比REBOA.
结论:
- 开发了一种新的算法,可在出血和大动脉封闭期间可靠量化单击和纵向P-V关系.
- 出血减少了P-V循环的大小,而REBOA和EVAC恢复了基线条件,但REBOA导致了过度的压力增加.
- 使用REBOA观察到的高变异性可能表明潜在的心脏损伤,突出了详细的P-V循环分析用于识别关键的血液动力学变化的实用性.
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