What is the normal SpO2 value?

• A. >94%
• B. <94%
• C. 90-92%
• D. 98-100%

Answer: (A)

SpO2 is the percentage of hemoglobin bound with oxygen, reflecting how well oxygen is being carried in the blood. In healthy adults at sea level, SpO2 is normally in the mid-to-high 90s, typically considered normal above about 94%. In practice, readings above 94% are treated as normal oxygenation, while lower values raise concern for hypoxemia. So the option indicating SpO2 greater than 94% best matches the standard expectation for normal oxygen saturation. Values in the high 90s, such as 98-100%, are normal too, but the clinically used threshold for normal oxygenation is >94%. Keep in mind readings can be affected by factors like poor perfusion or nail polish.