Which daily fluid limit is described for anuric CKD patients?

• A. 500–750 mL/day plus insensible losses
• B. 1500–2000 mL/day
• C. 2000–2500 mL/day
• D. 0 mL/day

Answer: (A)

In anuric CKD, the kidneys no longer produce urine, so there isn’t a renal way to excrete free water. The daily fluid allowance must balance what the body loses by non-urinary routes, primarily insensible losses through skin and lungs. Those insensible losses aren’t measured and can vary, but they’re typically around several hundred milliliters per day. So the practical limit is about 500–750 mL of intake each day plus the amount lost insensibly.

This approach prevents fluid overload, which is a major risk when the kidney can’t dispose of water. Larger daily volumes would promote edema and hypertension, while zero would ignore ongoing insensible losses and risk dehydration.