Should you be given oxygen if exposed to carbon monoxide at emergency room?

I, personally, think that giving oxygen would be a good idea. Do you have any symptoms.

It would depend on the amount of hemoglobin complexed with carbon monoxide, Point of Care blood gas analyzers, often available in ER can determine the amount of hemoglobin complexed with carbon monoxide. If you had a mild exposure, oxygen administration would not been warranted.