High-flow nasal cannula compared with continuous positive airway pressure: a bench and physiological study

• DOI: 10.1152/japplphysiol.00416.2021
• Publication Date: 2022-05-05T17:12:28Z
• Authors: Fernando Vieira; Frank Silva Bezerra; Remi Coudroy; Annia Schreiber; Irene Telias; Sebastián Dubo; Giulia Cavalot; Sergio Martins Pe...; Thomas Piraino; Laurent Jean Broc...
• Keywords: Respiratory tract; Respiratory Rate; Nasal cannula

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 decreased rate minute ventilation, therefore workload, counterbalancing pressure-time product per liter. These are less apparent with open not observed continuous pressure.