Effect of flow and cannula size on generated pressure during nasal high flow
Maximilian Pinkham, Stanislav Tatkov, Maximilian Pinkham, Stanislav Tatkov
No abstract availableKeywords: Acute respiratory failure; COVID-19; Nasal cannula; Nasal high flow; Positive airway pressure.
Conflict of interest statement
M. P. & S. T. are employees of Fisher & Paykel Healthcare Ltd.
Figures
The graph shows the positive airway pressure, cmH2O, that is generated by nasal high flow (NHF) using a smaller cannula (O.D. 6.1 mm) and larger cannula (O.D. 7.2 mm) in “nares” with two different diameters: 10 mm (left panel) and 9 mm (right panel) in the bench top model. Pressure generated by NHF can be increased by higher flow and by occluding a larger area of the nare, which can be achieved by increasing the cannula size
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Source: PubMed