Delivers dynamic positive airway pressure
With NHF, flow is prescribed and set. A level of dynamic positive airway pressure is generated as a result of the flow, which is dependent on a range of factors such as the weight of the infant, the set flow rate, and nare occlusion.4
It is therefore important to ensure that the nasal cannula does not create a seal in the nares, thus maintaining NHF as an open system.
The dynamic positive airway pressure associated with NHF has been shown to reduce inspiratory effort and work of breathing compared to standard oxygen therapy.5-7
Work of breathing is the force required to expand the lungs against their elastic properties.