In acute stroke, what SpO2 target is generally recommended?

In acute stroke, what SpO2 target is generally recommended?

• A. 88–92%
• B. 94–99% (individualize; avoid hypoxemia)
• C. 100%
• D. 90–93%

Answer: (B)

In acute stroke, the goal is to deliver enough oxygen to the brain without overshooting into high oxygen levels. Hypoxemia makes brain tissue more vulnerable during an ischemic event, so keeping SpO2 above about 94% helps protect the penumbra and support tissue survival. On the other hand, staying at very high oxygen levels offers little to no extra benefit and can be harmful, potentially causing oxidative stress or vasoconstriction that might reduce cerebral blood flow. Therefore the commonly recommended target is SpO2 in the mid-to-high 90s, about 94–99%, with adjustments for individual factors like chronic lung disease. If a patient’s oxygen saturation drops below the target, provide supplemental oxygen to bring it back up, but avoid sustaining oxygen at 100% for extended periods.

In acute stroke, the goal is to deliver enough oxygen to the brain without overshooting into high oxygen levels. Hypoxemia makes brain tissue more vulnerable during an ischemic event, so keeping SpO2 above about 94% helps protect the penumbra and support tissue survival. On the other hand, staying at very high oxygen levels offers little to no extra benefit and can be harmful, potentially causing oxidative stress or vasoconstriction that might reduce cerebral blood flow. Therefore the commonly recommended target is SpO2 in the mid-to-high 90s, about 94–99%, with adjustments for individual factors like chronic lung disease. If a patient’s oxygen saturation drops below the target, provide supplemental oxygen to bring it back up, but avoid sustaining oxygen at 100% for extended periods.