Which term describes the measurement of oxygen concentration in the blood?

• A. Oximetry
• B. Metabolism
• C. Radial
• D. Pulse Rhythmic

Answer: (A)

Oximetry is about measuring how much oxygen is carried by the blood, typically expressed as oxygen saturation. A pulse oximeter, often clipped on a finger, uses light to estimate saturation by comparing how much oxygenated versus deoxygenated hemoglobin absorbs light. This noninvasive method gives a quick read on how well oxygen is being delivered to the tissues. The other terms refer to different ideas: metabolism is about the body's chemical processes for energy, radial denotes a forearm pulse site, and pulse rhythmic describes the pattern of a heartbeat. Because oximetry directly describes the measurement of oxygen content in the blood, it is the best fit.