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Flow‐dependent resistance of nasal masks used for non‐invasive positive pressure ventilation

Objective and background:  Endotracheal tube resistance is known to be flow‐dependent and this understanding has improved the application of invasive ventilation. However, similar physiological studies on the interface between patients and non‐invasive positive pressure ventilation (NPPV) have not been performed. Therefore, this study was aimed at investigating the resistance of nasal masks used for NPPV.