Very interesting and potentially a life saving scheme. However, I would question that this is really a "Blood substitute" if it is made from hemoglobin taken from donated blood . This is still a matter of conscience for JWs as to whether they wish to accept it , and I know of family members within the org who most certainly would not wish to accept blood based treatment. Also :
clinical research in emergency settings using an exception from the
requirement for informed consent.
I am not sure that I would want to be treated with a substance that was only on trial, without consenting to it. Although I suppose that If I were at death's door already , that could make a difference to my opinion.requirement for informed consent.