Fluid building up in abdominal area before and after dialysis.

My son is 43 yrs old. He has only half of kidney now he is dealing with fluid in his stomach even after dialysis not being all removed so he has to have it drained. They say his liver is functioning then they say it's not he is now in hospital. Because when they were draining his stomache removing tube and hit artery so he wS bleeding internally how can I get help for him someone who knows what there doing he crashed the other night and al out died he is better now please help desperate mom