Normal SpO2 value from the material?

Normal SpO2 value from the material?

• A. 90-94%
• B. 93-97%
• C. 95-98%
• D. 97-99%

Answer: (B)

SpO2 shows how much of the hemoglobin in the blood is carrying oxygen, as measured by pulse oximetry. In healthy people breathing room air, you’d typically expect SpO2 to be in the mid-to-high 90s, often cited as about 95–100%. For this NBRC-style item, the normal range is given as 93–97%. This range is used because it accommodates small, everyday variations in readings that come from measurement factors (like slight motion, skin pigmentation, perfusion, or device limitations) while still clearly distinguishing values that indicate hypoxemia (generally below about 90%). So 93–97% is considered the normal reference in this material, since it accounts for realistic measurement variability without extending into ranges that might be flagged as borderline or abnormal. The other ranges either are too broad into higher normals or include values that are safer to classify as not-normal in typical exam standards.

SpO2 shows how much of the hemoglobin in the blood is carrying oxygen, as measured by pulse oximetry. In healthy people breathing room air, you’d typically expect SpO2 to be in the mid-to-high 90s, often cited as about 95–100%. For this NBRC-style item, the normal range is given as 93–97%. This range is used because it accommodates small, everyday variations in readings that come from measurement factors (like slight motion, skin pigmentation, perfusion, or device limitations) while still clearly distinguishing values that indicate hypoxemia (generally below about 90%). So 93–97% is considered the normal reference in this material, since it accounts for realistic measurement variability without extending into ranges that might be flagged as borderline or abnormal. The other ranges either are too broad into higher normals or include values that are safer to classify as not-normal in typical exam standards.