A patient's oxygen saturation drops to 90% while receiving 2L/min of oxygen via nasal cannula. Which immediate action is most appropriate?
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A
Document the finding and reassess in 30 minutes
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B
Increase oxygen flow rate and reassess, then escalate if no improvement
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C
Remove the nasal cannula and apply a non-rebreather mask immediately
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D
Call for emergency assistance before making any adjustments