静脉血液气体在接受睡眠研究的患者呼吸衰竭的评估中:一项随机研究
Steven James Lindstrom1,2,3,4,5,6,7, Christine Faye McDonald1,2,3,8, Mark Erskine Howard1,2,3,8
1Department of Respiratory and Sleep Medicine, Austin Health, Melbourne, Victoria, Australia.
概括
静脉血液气体 (VBGs) 可以帮助诊断睡眠研究患者的头高症,但对于所有呼吸衰竭评估来说都不够精确. 特定的PCO2值可以排除或确认没有动脉血液气体 (ABG) 的高头症.
科学领域:
- 肺部医学 肺部医学
- 关键护理医学 关键护理医学
- 临床诊断 临床诊断 临床诊断
背景情况:
- 动脉血液气体 (ABG) 是评估急性呼吸衰竭的标准,但有时会考虑静脉血液气体 (VBG),因为可能改善稳定患者的病情.
- 这项研究调查了VBGs作为ABGs的替代品在进行睡眠研究的慢性呼吸系统衰竭患者中的实用性.
研究的目的:
- 评估静脉血液气体 (VBG) 和动脉血液气体 (ABG) 之间的PCO2,pH,PO2和SO2的相关性和一致性.
- 确定VBG是否可以在特定的临床场景中可靠地替代ABG,特别是在接受睡眠研究的患者中诊断高头症.
主要方法:
- 一项涉及61名成人患者的随机研究,需要ABG进行睡眠或通风定位.
- 在ABG之前或之后立即绘制VBG,随后对静脉动脉相关性进行分析,并同意关键血液气体参数.
- 来自背手的VBGs被专门分析为PCO2差异.
主要成果:
- 在PCO2 (r=0.84) 和pH (r=0.72) 的动脉和静脉测量之间发现了强烈的相关性,但不是PO2或SO2.2.
- 调整后的静脉动脉差异平均值显示出显著的变化,特别是PO2和SO2.
- 来自背手的VBG显示了较低的平均PCO2差异. 特定的静脉PCO2值 (≥45.8 mmHg排除,≥53.7 mmHg诊断高头) 显示出高灵敏度和特异性 (AUC=0.91).
结论:
- 静脉PCO2测量可以有效地排除或诊断睡眠研究的患者的头过高,使用既定的值.
- 尽管VBG对过度头症的查有用,但在精确的测量对于管理呼吸衰竭至关重要时,VBG并不总是适合替代ABG.
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