在无流量评估中探索时间动态
medRxiv : the preprint server for health sciences
|December 25, 2025
概括
没有回流,急性缺血性中风 (AIS) 血管内血栓切除术 (EVT) 后的并发症,主要取决于时间. 早期的评估显示达成一致程度较低,但后续的评估提高了对这一关键输液问题的可靠性.
科学领域:
- 神经学 神经学
- 干预性放射学 干预性放射学
- 医疗成像医学成像
背景情况:
- 对于急性缺血性中风 (AIS) 的成功内血管血栓切除术 (EVT) 并不能总是恢复功能独立.
- 无反流,尽管有大血管封闭 (LVO) 重开通道,但其特点是 perfusion 很差,这是导致这种差异的一个关键因素.
- 目前评估无回流的方法缺乏标准化,在将其与其他血液动力学问题区分开来,并考虑时间动力学方面面临挑战.
研究的目的:
- 探索自EVT以来的时间对各种无回流评估方法的性能的影响.
- 在EVT后的不同时间点评估不同无反流检测技术的一致性和可靠性.
主要方法:
- 分析了在M1或ICA段成功LVO再通道化 (≥mTICI 2b) 的UCLA健康患者队列.
- 患者被分为EVT后的早期 (<24小时) 和随访 (<48小时) 队列.
- 已发表的无反流检测输液成像方法被调整为半自动应用在两个队列.
主要成果:
- 没有回流率的差异很大 (4.2%~51.4%),取决于方法,EVT以来的时间和mTICI得分.
- 与早期评估相比,后续评估与现有文献更加紧密地结合在一起.
- 在早期队列中,方法间一致性很差 (kappa低至-0.017),但在后续队列中显著改善 (高达0.72).
- 与mTICI 2b相比,mTICI 2c/3病例的无回流率下降了约50%,这表明mTICI 2b可能会增加无回流率.
结论:
- 无回流评估高度依赖时间,影响所有评估的检测方法的性能.
- 虽然使用类似 perfusion 参数的方法显示出很好的一致性,但混因素需要强大,潜在的聚合,评估方法.
- 无回流检测的时间动态引发了关于EVT后最佳成像时间的关键问题,以便及时干预.
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