What FiO2 should be provided immediately after ROSC until oxygenation status is assessed?

What FiO2 should be provided immediately after ROSC until oxygenation status is assessed?

• A. 0.21 (Room Air)
• B. 0.50
• C. 1.0 (100%)
• D. 0.30

Answer: (C)

Immediately after ROSC, provide 100% oxygen to maximize oxygen delivery while the patient’s oxygenation is being assessed. The post‑arrest period often features impaired gas exchange from lung injury, edema, or atelectasis, so raising the arterial oxygen content quickly helps ensure tissues receive enough oxygen as you rapidly measure SpO2 and/or arterial blood gases. After you have oxygenation data, you can titrate FiO2 down to a target range (often around the mid‑90s SpO2 in most patients, adjusted for conditions like COPD). Lower FiO2 initially would risk hypoxemia during this critical transition.

Immediately after ROSC, provide 100% oxygen to maximize oxygen delivery while the patient’s oxygenation is being assessed. The post‑arrest period often features impaired gas exchange from lung injury, edema, or atelectasis, so raising the arterial oxygen content quickly helps ensure tissues receive enough oxygen as you rapidly measure SpO2 and/or arterial blood gases. After you have oxygenation data, you can titrate FiO2 down to a target range (often around the mid‑90s SpO2 in most patients, adjusted for conditions like COPD). Lower FiO2 initially would risk hypoxemia during this critical transition.