在侵入性通风过程中暂停加热加湿的后果
François Lellouche1, Pierre-Alexandre Bouchard2
1Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, Québec, Canada. francois.lellouche@criucpq.ulaval.ca.
当加热加湿器在机械通风期间关闭时,气体湿度显著下降,但仍然高于干燥的医疗气体. 建议持续加湿,特别是在雾化期间,因为湿度波动的临床影响尚不清楚.
科学领域:
- 呼吸系统护理 呼吸系统护理
- 医疗设备工程 医疗设备工程
- 肺部生理学 肺部生理学
背景情况:
- 侵入性机械通风需要持续的气体加湿.
- 干气体可能会在雾化过程中影响肺部沉积,但体内数据有限.
- 当加热加湿器关闭时,了解气体湿度测量是至关重要的.
研究的目的:
- 在各种条件下量化气体湿度,特别是当加热加湿器被关闭时.
- 提供机械通风过程中气体湿度计的经验数据.
主要方法:
- 使用心理测量方法测量气体绝对湿度.
- 在稳定状态和动态条件下的评估 (加湿器开/关).
- 在通风电路的Y部分进行的测量.
主要成果:
- 医疗气体的绝对湿度很低 (1.6±0.2毫克H2O/L).
- 在关闭加热加湿器时,湿度为9.1 ± 0.3毫克H2O/L,在打开时升至34.2 ± 2.2毫克H2O/L.
- 在关闭加湿器后,湿度在一个小时内下降到10毫克H2O/L以下.
结论:
- 当加热加湿器关闭时,气体湿度显著下降,但仍然高于干气水平.
- 间歇性加湿器关闭的临床影响需要进一步调查.
- 根据建议,加热加湿器应在雾化期间保持开放.
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