Clinical biomechanics
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Clinical biomechanics · Jun 2019
Correlation of high flow nasal cannula outlet area with gas clearance and pressure in adult upper airway replicas.
Primary benefits of high flow nasal cannula therapy include washout of carbon dioxide rich exhaled gas and increased airway pressures during tidal breathing. This work reports on the influence of high flow nasal cannula outlet area on upper airways gas clearance and tracheal pressures using measurements in five realistic adult nose-throat airway replicas. ⋯ Since increased pressure and clearance rate have been associated with improved clinical outcomes in previous studies, our results suggest that smaller cannula outlet area may be preferable.