When a patient's airway becomes completely obstructed, which sign will the nurse see first?
1. Pallor changing to cyanosis
2. A sudden change in mentation
3. A decrease in urine output
4. Cyanosis changing to pallor
2
Rationale 1: Changes of color are not an immediate sign of airway obstruction.
Rationale 2: A change in mentation reflects a decrease in oxygenation of the brain. This change will happen rapidly.
Rationale 3: A decrease in urine output is not an early sign of airway obstruction.
Rationale 4: Changes of color are not the most immediate sign of airway obstruction.
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