This is a great illustration of what happens when a person does hyperbaric oxygen treatments. Pressurized oxygen is forced into the tissues from the blood and the plasma oxygenating the tissues in the body where normally oxygen may not be able to flow to. If a blood vessel is damaged or restricted oxygen carrying red blood cells may not reach part of the vessel. Since oxygen circulates in the plasma the oxygen reaches tissues where it may not have been possible otherwise. New blood vessels are also created through the hypberbaric therapy process.