SpO2	Intervention
>95%	Considered normal and generally requires no invasive intervention.* Continue routine monitoring of Pt.
91%–94%	Considered borderline.* Assess and adjust probe placement. Begin oxygen at 2 L/min titrated to SpO2 >95%.
85%–90%	Elevate head and encourage Pt to cough and breathe deeply. Assess airway and suction as needed. Administer oxygen and titrate to SpO2 >95%. If condition fails to improve, assist ventilations manually and prepare to intubate.
<85%	Administer 100% oxygen, set Pt upright, encourage coughing and deep breathing, and suction as needed. Assist ventilations manually and prepare to intubate if condition fails to improve. Consider reversal agents for possible drug-induced respiratory depression.

^* Consider readings within overall context of Pt’s medical history and physical exam. NEVER withhold treatment based solely on a “normal” SpO₂ reading.

Conditions That May Produce False Readings

False High Readings

• Anemia
• Alkalosis
• CO poisoning
• Hypovolemia
• Pt movement

False Low Readings

• Cool extremities
• Drugs (vasoconstrictors)
• Nail polish/nail infection
• Pt movement
• Poor peripheral circulation
• Raynaud disease