There are several reasons why the scientific community is working on developing artificial blood to use instead of real blood: Immune reactions to the blood. Risk of infections. Donor blood must match the blood type of the recipient.
’The artificial red blood cell contains a membrane or polymer [casing] around the haemoglobin,’ he explains. The casing is made from biodegradable polymers, such as poly (lactic acid), that degrades into lactic acid and then water and carbon dioxide in the body.
PolyHeme, from Northfield Laboratories, is another type of artificial blood. At first glance, artificial blood seems like a good thing. It has a longer shelf life than human blood. Since the manufacturing process can include sterilization, it doesn’t carry the risk for disease transmission. Doctors can administer it to patients of any blood type.