Why have artificials livers not developed yet?

I think it may not be too long before artificial livers are available to surgeons. There has been great difficulty in hepatic disease. There have been several approaches to the problem, mostly bio-engineering or cell implantation After all, a patient cannot live without a liver while awairing research and experimentation.

In Cincinatti, some scientists working on the development of artificial human livers have had some success by bioengineering human liver tissues. Stem cells, are one of the most important components of regenerative medicine. If these can be developed, the shortage of transplantable livers will not be so crucial. For stem cell transplation decreases the need for whole-organ transplantation.