your father has renal failure,
we have to differentiate if it is Acute renal Failure
( which can recover) or a chronic renal failure
which is not likely to recover. secondly what is the cause of renal failure. these can be judged on the basis of duration of illness any serum creatinine
report 2 months back, urine routine findings, and ultrasound kidney
size. also whether he is diabetic. after assessing all this data only one can comment the chances of recovery. if no improvement occurs in 2 to 3 months time then it is unlikely to improve
hope this helps.