医学
麻醉
潮气量
呼吸道
鼻插管
到期
气道
呼吸频率
气道阻力
套管
通风(建筑)
持续气道正压
呼吸系统
正压
内科学
外科
心率
血压
工程类
机械工程
作者
Fernando Fernandes Vieira,Frank Silva Bezerra,Rémi Coudroy,Annia Schreiber,Irene Telias,Sebastián Dubo,Giulia Cavalot,Sergio Luiz Pereira,Thomas Piraino,Laurent Brochard
标识
DOI:10.1152/japplphysiol.00416.2021
摘要
High-flow nasal cannula generates positive airway pressure and reduces respiratory rate. Our findings confirm these physiological effects when the mouth is kept closed. An increased resistance to breathing induces a longer expiratory phase, which leads to decreased respiratory rate and minute ventilation, and therefore to a decreased respiratory workload, counterbalancing the increased pressure-time product per liter. These effects are less apparent with the mouth open and are not observed with continuous positive airway pressure.
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