- Purpose: It measures the percentage of hemoglobin in the blood that is saturated with oxygen (
SpO2cap S p cap O sub 2
𝑆𝑝𝑂2
) and the heart rate in beats per minute (bpm).
- Working Principle: It uses photo-plethysmography (PPG) technology, which shines two wavelengths of light (red and infrared) through the skin to analyze light absorption by oxygenated and deoxygenated blood.
- Key Components: Typically consists of a finger clip, a light source (LEDs), a photodetector, and a display screen.
. Uses of Pulse Oximeter
- Home Monitoring: Used for tracking chronic conditions like COVID-19, COPD, asthma, pneumonia, and heart disease.
- Athletic Performance: Athletes use it to monitor oxygen levels during exercise or at high altitudes.
- Clinical Settings: Hospitals and ambulances use it for continuous monitoring during surgery, anesthesia, and in emergency rooms.
- Sleep Apnea: It helps detect drops in blood oxygen levels during sleep.




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