After ROSC, what oxygenation target is recommended to avoid hyperoxia?

After ROSC, what oxygenation target is recommended to avoid hyperoxia?

• A. SpO2 88-92% (PaO2 60-70 mmHg)
• B. SpO2 92-94% (PaO2 70-80 mmHg)
• C. SpO2 99-100% (PaO2 > 300 mmHg)
• D. SpO2 94-98% (PaO2 80-100 mmHg)

Answer: (D)

After ROSC, the goal is to provide enough oxygen to meet tissue needs without driving oxygen levels into excess. Hyperoxia can worsen reperfusion injury through oxidative stress and can impair microcirculation, so the safest target is a mid‑90s range that keeps PaO2 around 80–100 mmHg. That corresponds to an SpO2 of about 94–98%. SpO2 in the high 80s–low 90s would risk insufficient oxygen delivery to brain and heart. SpO2 at 92–94% sits at the lower border of adequate oxygenation and may still be acceptable in some settings, but it’s closer to hypoxemia. SpO2 at 99–100% generally indicates PaO2 well above normal, which increases the risk of oxygen toxicity. Keeping to 94–98% balances avoiding both hypoxemia and hyperoxia.

After ROSC, the goal is to provide enough oxygen to meet tissue needs without driving oxygen levels into excess. Hyperoxia can worsen reperfusion injury through oxidative stress and can impair microcirculation, so the safest target is a mid‑90s range that keeps PaO2 around 80–100 mmHg. That corresponds to an SpO2 of about 94–98%.

SpO2 in the high 80s–low 90s would risk insufficient oxygen delivery to brain and heart. SpO2 at 92–94% sits at the lower border of adequate oxygenation and may still be acceptable in some settings, but it’s closer to hypoxemia. SpO2 at 99–100% generally indicates PaO2 well above normal, which increases the risk of oxygen toxicity. Keeping to 94–98% balances avoiding both hypoxemia and hyperoxia.