肺保护性通气
(Lung-protective ventilation)
01
PEEP设定是当前主要研究难题
不同ARDS患者具有不同呼吸力学特点,
且与PEEP反应性相关
Conclusions:
In ARDS, the percentage of potentially recruitable lung is extremely variable and is strongly associated with the response to PEEP.
肺内/外源性ARDS具有不同的呼吸生理学特征
Conclusions:
Given the same transpulmonary pressures,RMs are more effective at opening collapsed alveoli in ALlexp than in ALlp, thus improving lung mechanics and oxygenation with limited damage to alveolar epithelium.
1
肺容积监测
苦役
CT
土豪
呼吸机吸入洗出法
EIT
非定量
超声
2
床旁可利用指标
氧合(最常用,但不是直接指标)
Crs
基于呼吸力学的复张容积测定(近些年来发表)
慢吐气法
应力指数
应用ΔEELV测量复张容积
VCV模式
ΔPEEP = 10-0 = 10
VT=650
ΔP = Pplat - PEEP = 23-10= 13
Crs = VT/ΔP = 650/13 = 50
MPV = ΔPEEP x Crs-low = 10 x 50 = 500
ΔEELV = 1230-650 = 580
Vrec = ΔEELV - MPV = 580- 500 = 80
Vrec/PEEP = 80/10 = 8
Pressure-Time Curve Predicts Minimally Injurious Ventilatory Strategy in an Isolated Rat Lung Model
Stress Index Can Be Accurately and Reliably Assessed by Visually
Inspecting Ventilator Waveforms
在这项研究中也是比较了相同病人的研究设计,一方面是PSV,另外一方面是相同潮气量的VCV测出来的呼吸系统顺应性,两者的一致性还是非常好的。
summary
参考文献
[1] Molondy ED, et al. Protective ventilation of patients with ARDS. Br J Anaesth 2004; 92: 261-70.
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