Answers are grounded in this paper and cite their sources.
Physiological study reveals intratracheal pressure changes during high-flow nasal cannula therapy in catheterized patients, highlighting discrepancies between assumed and actual flow.
High-flow nasal canulae (HFNC) deliver high-flow humidified gas at up to 60 l/minute. There are two types of respiratory circuit to generate mix gas flow, Blender type (typeB) and Venturi type (typeV). The therapy is well established in the pediatric population and HFNC use has been described in the adult population. It has been reported that HFNC provide higher FIO 2 compared with low-flow canulae, and also create mild positive pharyngeal airway pressure, but the effect on alveolar pressure is unknown. We aimed to investigate the effect of HFNC on alveolar pressure, by measuring intratracheal pressure in patients with a cricothyrotomy catheter (CTC). At the same time, we measured the actual gas flow rate (AGFR) by flowmeter and compared it with assumed flow.
No takes yet. Share an insight, caveat, or question.
Hayami et al. (2013) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: