Patients this condition are really super sick. His lungs are no longer functioning efficiently and his heart isn't pushing blood and recirculating. Couple with being stationary in bed opens you up to opportunistic infections. He is on antibiotics, pressers, drugs to aid in liver and kidney function as well as tube feeding for nutrition most likely. Also he would be dependent on a suitable donor becoming available. In addition to being on a waitlist. People do survive, however he has a long long way to go.