When treating carbon monoxide poisoning using extra oxygen therapy, the goal is to get the patient's oxygen level back up to normal as rapidly as possible while lowering the quantity of carbon monoxide poisoning in blood vessels. Inhaling 100 percent more oxygen inside a chamber where the air pressure is about 2-3 times greater than average is the treatment for carbon monoxide poisoning. This expedites the process of the blood replacing the carbon monoxide poisoning it contains with oxygen dissolved.