Pulse Oximetry

Unexpected outcome

• 1- Accurate pulse oximetry is not obtainable because of movement artifact.
• 2- Low perfusion state or excessive edema prevents accurate pulse oximetry measurements.
• 3- Disagreements occur in Sao2 and oximeter Spo2

Patient monitoring and care

• Evaluate laboratory data along with the patient for evidence of poor oxygenation. (Spo2 values are one segment of a complete evaluation of oxygenation and supplemental oxygen therapy.
• Data should be integrated into a complete assessment to determine the overall status of the patients.
• If Spo2 is used as an indicator of Sao2 ,an arterial blood gas should be done to determine if the values correlate consistently.