How do you do medical research in the field of emergency medicine, when most patients are unconscious and unable to give their consent? Such testing is currently underway at Duke University with an experimental blood substitute called PolyHeme. Host Frank Statio speaks with: Ross McKinney, vice dean of research at the Duke University School of Medicine; Nancy King, professor of social medicine at the University of North Carolina at Chapel Hill; and Bruce Japsen, reporter with the Chicago Tribune, about the scientific, legal and ethical questions raised by the PolyHeme trials. Listener Call-In. (40:00)