my father is 67 years old undergoing dialysis thtice a week since last two months before that it continued twice a week for about an year. since last 2 to 3 months he is suffering from swollen abdomen . doctors are unable to find the exact cause of fluid retention. gastroenterologist is saying liver is ok. last week he went through a by pass surgerey as it was found that he has got 3 major blockages in heart. the operation was succesful. but the abdomen is still swollen.