My Dad Has Bn In Coma Fo Upto 72hrs Now

My dad has bn in coma fo upto 72hrs now and we actually don't no the exact cause tho. Although he has had several surgeries in the past and presently had the 4th surgery for prostrate where the urine pipe was passed through his tommy....okay in coma now and hav bn showin signs of movement and yawning Buh won't open his eyes.pls is he gonna pull through this? I nid ur help advice me .