Does induced coma mean critical condition?

My father in law has been in an induce coma for a week now and on life support after having a kidney transplant. He was already very sick before the surgery, Diabetes, high blood pressrue, hypertension, heart problems...and 2 years of dialysis that has made his heart even weaker. A few days ago they took him off the induced coma medication to see if he can wake up. They said he try to wake up but was having a heart problem so they had to induce him again. So now he is going on 2 weeks of life support and a ventilator. The kidney never did start working, it is showings some signs of functioning, but not much. My sister in law gave the kidney and she is also recovering, she seems to be in a lot of pain (she had it taken out he old fashion way) Anyhow this doesnt look good to me, all the doctors keep saying is "he will be fine" How is this fine? My father in law lives in india and is being treated in a neighboring city that has a big hospital. My husband is with him now, seems like he is getting the run around and not getting straight answers. Should we expect the worse?