Re: function of kidneys is 15% what does this mean
It means that your kidney function has deteriorated significantly. At this point you need to meet with a nephrologist (kidney specialist) and their team. This will include a dietitian and probably a social worker who will help you with the eventual transition to dialysis. The good news is that dialysis is not as scary as you think. You will be able to do it and still have a life. The team will help you with diet and other issues such as blood pressure.
When you actually go on will depend not only on the kidney values but also on how you feel. You may get fed up with swelling, or feel really tired and unwell. Dialysis will make you feel better when you reach that point.
As I said before, you can still have a life and live well, even with kidney failure. If you have any specific questions, feel free to ask. There is a lot of expertise on this board.
Dxd T1 1966, 2001 dialysis, 2002 kidney transplant, 2003 insulin pump, 2008 pancreas transplant