在全身麻醉期间,由于注入晶体液而加速的淋巴流
1Department of Clinical Sciences, Karolinska Institutet at Danderyd Hospital, Stockholm, 182 88, Sweden. robert.hahn@ki.se.
BMC anesthesiology
|March 28, 2024
概括
全身麻醉降低了晶体液的中央分布体积 (Vc). 这与血中白蛋白的增加有关,这表明由于麻醉,液体会转移到血液中.
科学领域:
- 生理学 生理学 生理学
- 麻醉学 麻醉学
- 药理动力学 药理动力学
背景情况:
- 晶体流体的分布体积 (Vc) 通常与血体积 (~3 L) 相似.
- 一般麻醉可以将Vc减少到其通常大小的一半.
- 这项研究调查了血管内白蛋白平衡在这种Vc减少中的作用.
研究的目的:
- 为了确定静脉内白蛋白平衡是否会影响全身麻醉期间晶体液的减少中央分布体积 (Vc).
- 分析在麻醉和清醒状态下的晶体注期间的液体转移和白蛋白动力学.
主要方法:
- 使用三分区模型进行种群体积动力分析.
- 来自160个晶体注实验 (1-2.5L) 的回顾性数据.
- 测量了血稀释 (血红蛋白和白蛋白) 和尿液输出;与麻醉 (1/3) 和清醒 (2/3) 的志愿者进行了比较.
主要成果:
- 血红蛋白-白蛋白 (Hb-Alb) 稀释差异在全身麻醉期间 (0.024 ± 0.060) 与清醒状态相比 (-0.008 ± 0.050) 显著增加.
- 这表明麻醉期间血管内白蛋白平衡为正值,这表明进入血的白蛋白比丢失的更多.
- Hb-Alb稀释与流体转移速率 (k12,k21) 呈正相关,与Vc相反;模拟显示~200mL流体转移到血.
结论:
- 全身麻醉与明显的早期血体积膨胀和阳性血管内白蛋白平衡有关.
- 加快的淋巴流可能有助于这种白蛋白转移.
- 这种现象可能代表体液体积对麻醉诱导的血管扩张的调整.
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