Immediately after cardiac arrest and resuscitation, a patient is placed on a ventilator in the continuous mandatory ventilation assist-control mode. What initial FIO₂ would you recommend?

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After cardiac arrest and resuscitation, it's common to start with a high fraction of inspired oxygen (FiO2) to ensure adequate oxygenation. An initial FiO2 of 1.0 (100% oxygen) is often recommended to quickly correct any hypoxemia, after which it can be titrated down based on blood gas results and oxygen saturation.

Immediately After Cardiac Arrest and Resuscitation, a Patient Is Placed