You have just reviewed Casey, 49, who you started on 6L/min via nasal cannula for a few hours with a target range of 94 - 98%. She was maintaining an SpO2 of 94% last time you saw her. Her SpO2 is now 90% and her respiratory rate is 28. What would be the most appropriate next step?
She is not within her target range - switch to a simple face mask and increase the flow rate.
Her SpO2 has dropped more than 3% and is requiring increased oxygen to maintain target saturations so she will need blood gases taken and a senior review.
