Several factors can influence SaO2 readings, including:
Perfusion: Poor blood flow can result in inaccurate readings. Movement: Patient movement can interfere with the pulse oximeter sensor. Nail Polish: Dark nail polish can affect the sensor's ability to read accurately. Ambient Light: Excessive light can interfere with the pulse oximeter. Carbon Monoxide Poisoning: This can falsely elevate SaO2 readings as CO binds to hemoglobin with greater affinity than oxygen.
