驱动压力与基于氧化的PEEP定位策略在ARDS患者中:一个生理学研究
Silvia Coppola1, Giulia Catozzi2, Tommaso Pozzi1,2
1Department of Anesthesia and Intensive Care, ASST Santi Paolo e Carlo, San Paolo University Hospital, Via Di Rudini 9, Milan, Italy.
与实证方法相比,临床PEEP定位改善了ARDS患者的呼吸机制. 观察到较低的肺压力和驾驶压力,特别是在中度至重度的ARDS中较低的PEEP水平.
科学领域:
- 临界护理医学 临界护理医学
- 呼吸系统生理学 呼吸系统生理学
- 机械通风机械通风机械通风
背景情况:
- 急性呼吸困扰综合征 (ARDS) 的管理包括优化正极呼吸压力 (PEEP).
- 存在不同的PEEP定位策略,包括基于驱动压力和氧化的策略.
- 保护性肺透气在ARDS中至关重要,以尽量减少呼吸器诱导的肺损伤.
研究的目的:
- 为了比较三个PEEP定位策略对ARDS患者气体交换,呼吸机制和机械功率的影响.
- 根据驾驶压力,高PEEP/FiO2表和固定的PEEP水平来评估PEEP策略.
- 评估这些策略对机械通风过程中的肺应力和机械功率的影响.
主要方法:
- 对35名机械呼吸ARDS患者进行前性观察性研究.
- 实施三个PEEP定位策略:临床 (驱动压力),经验 (高PEEP/FiO2表) 和固定 (5或15cmH2O).
- 在每种PEEP策略20分钟后测量呼吸机制,气体交换和血液动力学.
主要成果:
- 与经验PEEP相比,临床PEEP定位导致末端吸入气道压力,肺弹性和PaCO2降低.
- 在轻度至中度的ARDS中,固定PEEP (5cmH2O) 显示出比临床或经验PEEP更低的末端吸入气道压力和肺部压力.
- 在中度至重度的ARDS中,经验和固定PEEP (15cmH2O) 导致比临床PEEP更高的气道压力,肺压力和PaCO2.
结论:
- 与经验性PEEP策略相比,临床PEEP定位提供了优越的呼吸机制.
- 低固定的PEEP (5cmH2O) 可能对轻度至中度的ARDS患者有益,可以改善肺机械,而不会影响气体交换.
- 与临床PEEP相比,中度至重度ARDS中较高的PEEP水平 (15cmH2O) 与增加的肺压力和较差的气体交换有关.
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