在经过骨科手术的麻醉马中,流量控制的呼吸改善了气体交换
Klaus Hopster1, Joao Henrique Neves Soares2, David Levine1
1Department of Clinical Studies-New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
与体积控制呼吸 (VCV) 相比,FLEX在麻醉期间显著改善了马的氧化和呼吸机制. 这项研究证实了FLEX在大型临床环境中的好处,增强了气体交换和通风-透气匹配.
科学领域:
- 兽医麻醉
- 呼吸系统生理学
- 马类手术
背景情况:
- 在实验室环境下,控制流量排气 (FLEX) 显示有提高马的氧化能力的潜力.
- 之前的研究表明,FLEX在改善马类受试者的氧化能力方面是有效的.
研究的目的:
- 在接受骨科手术的大型临床群体中验证FLEX的实验室发现.
- 评估FLEX对麻醉马的气体交换和呼吸机制的影响.
主要方法:
- 一项前性随机临床试验,涉及406匹健康的成年马接受选择性骨科手术.
- 马被分配到FLEX或体积控制通风 (VCV) 后背或侧卧.
- 测量了动脉血液气体,通风/输液匹配,动态呼吸系统符合性 (Cdyn) 和气道峰值压力.
主要成果:
- 与VCV相比,用FLEX透气的马在背部和侧面的位置表现出明显更高的PaO2/FiO2比率 (p < 0.001).
- 在背部躺卧的马匹中,FLEX改善了动态呼吸系统符合性 (Cdyn) 和通风/透气匹配 (分别为p = 0.01和p = 0.03).
- 在两种位置均观察到显著的氧化改善,而机械效益主要在背部倒卧.
结论:
- 该研究证实,FLEX与VCV相比,在大量临床麻醉马群中显著改善了氧化,通风和输液匹配以及呼吸机制.
- 这些发现与之前的实验室结果相一致,强调FLEX作为马麻醉中有益的通风策略.
- 局限性包括非标准化麻醉方案和缺乏掩护,建议对其他患者群体的概括性保持谨慎.
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