Artificial Blood!

This stuff isn't even really being viewed as a blood replacement. This is simply a highly efficient oxygen carrier. Blood performs many more functions, including transport of nutrients, wastes, thermal energy, clotting factors, and immuno-agents. As mentioned in the article, this synthetic being applied as an oxygen therapy rather than blood replacement. It ensures that oxygen can be delivered to areas of the body that red blood cells can no longer go due to swelling or clotting. In the case of a traumatic brain injury, where swelling pinches off tiny blood vessels and starves the tissue of oxygen, it can make the difference between recovery and permanent brain damage.

Jam it back in, in the dark.