Hemoglobin-Based Oxygen Carriers

The concept of oxygen-based carriers is if you can have the good part about carrying oxygen in a way that can not only grab on but also let go that is a good thing now as surgeons learned from acute hematologic transfusion reactions. These are not licensed products you can't just get them when you think you might need them there's an entire process you need to go through to obtain release and one of those criterion is essentially in addition to no alternative i.e. Jehovah's Witness where there really is not an option.