Dear guest
I am trusting that my conversion table is correct and that your quote of 64 oz is equivalent to around 1890 ml/day … so, let’s assume that is right … and if so, that is a fairly ‘average’ fluid intake for a normal sized human …
But, that said, I know nothing of you, your size, your BMI, your age, your cardiac status, your body habitus, your underlying renal disease, your blood pressure, your diabetic status, your serum albumin … all these and, i am afraid, more … would influence a doctors’ assessment of a recommended daily fluid intake.
So … you can see, I can’t pass a sensible judgement/comment with the Knowledge I have.
Broadly, I do not subscribe to recommendations of fluid restriction or excess for most patients with CKD3 … rather, most can/should drink as their physiological demands dictate - ie: drink as you feel comfortable … don’t over-push it, but drink to need/desire …
But, that said …
What if you have cardiac disease: that may demand fluid restriction … and often to less than the quoted 64 oz (coupled with salt restriction).
What if you are a salt-waster and need excess fluid … or are bipolar on lithium … that may need a higher fluid/salt intake.
Or nephrotic …
Or diabetic …
What all this boils down to is that fluid intake for a CKD3, while for many it can and/or should be free … must (in given circumstances) be scripted according to the underlying clinical status.
Yours, I do not know. Your doctor knows you best. He/she will presumably have reasons why 64 oz has been chosen as you limit.
Just ask why. If you are un-nerved by or unhappy with the restriction … just ask why.
If you doctor cannot explain the advice he/she gives, well, to your understanding and satisfaction … then seek another opinion. That is always your right.