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학습 자료 둘러보기 →A drop in SpO2 below 90% on a fixed oxygen device, especially with new-onset restlessness, signals cerebral hypoxia and failing respiratory compensation. This is a medical emergency.
For patients with COVID-19 pneumonitis, a rapid decline often reflects a severe ventilation-perfusion mismatch that low-flow oxygen cannot correct. The priority is immediate provider notification to prepare for advanced airway management and possible intubation.
Do not mistake hypoxic restlessness for anxiety. Increasing the nasal cannula flow rate from 4 L/min to 6 L/min provides a marginal FiO2 increase and delays definitive treatment. Positioning and breathing exercises are supportive only and do not replace escalation.
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