Which SpO2 value requires prompt assessment?

• A. 96%
• B. 92%
• C. 98%
• D. 97%

Answer: (B)

SpO2 shows how much oxygen is binding to hemoglobin. In most adults, normal is about 95–100%. A reading around 92% is below normal and signals potential hypoxemia, so it should prompt a quick assessment of the patient’s breathing and oxygenation. That means checking airway patency and breathing effort, listening to lung sounds, noting rate and work of breathing, verifying the sensor is placed correctly, and considering whether supplemental oxygen or further intervention is needed. Readings in the high 90s are within normal limits and typically don’t require urgent action unless there are other concerning signs or a known low baseline. So the value that requires prompt assessment is 92%.