Single Venturi Masks
These masks, sometimes called High Air Flow Oxygen Enrichment (HAFOE) masks incorporate a Venturi Barrel and use the Bernoulli principle to deliver a predetermined and fixed concentration of oxygen to the patient, regardless of the patients respiratory pattern, providing a higher gas flow than the peak inspiratory flow rate.
The performance of small venturi
masks are not considered as accurate as large volume masks. The
concentration is very much dependent on patients breathing rate and
minute volume.
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