Venturi Oxygen Masks

??Venturi maskes provide a specific % concentration of oxygen. They are well suited for patients at risk of type 2 respiratory failure and especially suited to those with COPD. The % of oxygen delivered by a venturi mask can be modified by changing removable ‘entrainers’. The required oxygen flow rate for a particular entrainer is stamped onto the entrainer- increasing the oxygen flow rate will not change the % oxygen delivered to the patient.