Inaccurate readings on a pulse oximeter, a device that measures oxygen saturation in the blood, can arise from various factors related to the patient, the equipment, and the environment. Patient-related factors include poor perfusion, where insufficient blood flow to the measurement site (usually a finger) can prevent accurate readings. This can occur due to conditions like hypothermia, hypotension, or vasoconstriction. Nail polish, particularly dark colors, can interfere with the light tra....
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