Nursing · Diagnostic Modalities and Equipment
Which of the following statements about pulse oximetry is correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The normal resting oxygen saturation range for a healthy individual at sea level is 85–90%.
- 2Pulse oximetry works on the principle of spectrophotometry based on the Beer–Lambert Law.✓
- 3Oxygenated hemoglobin absorbs significantly more red light at 660 nm than deoxygenated hemoglobin.
- 4Deoxygenated hemoglobin absorbs significantly more infrared light at 940 nm than oxygenated hemoglobin.
Correct answer
Pulse oximetry works on the principle of spectrophotometry based on the Beer–Lambert Law.
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