In the case of carbon monoxide exposure, what is the first action to take?

When dealing with carbon monoxide exposure, the priority must be to ensure the safety of the patient by removing them from the source of exposure. Carbon monoxide is a colorless, odorless gas that can lead to serious health issues, including loss of consciousness and death, due to its ability to displace oxygen in the blood. By removing the patient from the contaminated environment—be it a structure or vehicle—rescuers can prevent further exposure and allow the patient to begin recovering in a safer environment.

Once the patient is removed from the source, then administering oxygen is crucial for treatment, but the immediate action focuses on ensuring they are no longer at risk of further exposure to carbon monoxide. Checking vital signs and providing blankets would typically follow, but these actions are secondary to the critical step of facilitating a safe environment away from the poisonous gas.