I had left ureter reimplant surgery 3yrs back due to distal ureter stritcher and stone.i had done dtpa scan and in that scan my right is working 35% and left kidney which had stone moderate hn and hu working 65%.my creatine serum is 0.70 and other report is also normal.i am very tensed about kidney am i at risk of kidney failure and what precaution should i take.i am hemophilia also.i heard that kidney patients should drink lesser water, is it true?