8 doctors weighed in:
I read somewhere that chronic renal failure can present with polyuria. Then how is it that acute renal failure is the opposite?
8 doctors weighed in

Dr. John Bucek
Family Medicine
5 doctors agree
In brief: Both can
Some types of acute renal insufficiency resolve with a large amount of urine production as the kidney regains some normal function.
Some types of chronic renal insufficiency involve loss of protein or electrolytes and large amounts of urine production can result. Both acute and chronic renal insufficency have types where little or no urine is made.

In brief: Both can
Some types of acute renal insufficiency resolve with a large amount of urine production as the kidney regains some normal function.
Some types of chronic renal insufficiency involve loss of protein or electrolytes and large amounts of urine production can result. Both acute and chronic renal insufficency have types where little or no urine is made.
Dr. John Bucek
Dr. John Bucek
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1 comment
Dr. Keith Klein
Chronic renal insufficiency can never have little or no urine output or the patient will quickly be on dialysis within several days
Dr. Keith Klein
Internal Medicine - Nephrology & Dialysis
2 doctors agree
In brief: Polyuria
Chronic renal disease causes a defect in the kidney's ability to conserve water (urine) so you urinate more.
Acute renal failure is usually more rapid severe damage that interferes with the kidney's ability to form water. If you can't make urine, you cannot survive more than a few days, so there is no chance to develop chronic renal failure.

In brief: Polyuria
Chronic renal disease causes a defect in the kidney's ability to conserve water (urine) so you urinate more.
Acute renal failure is usually more rapid severe damage that interferes with the kidney's ability to form water. If you can't make urine, you cannot survive more than a few days, so there is no chance to develop chronic renal failure.
Dr. Keith Klein
Dr. Keith Klein
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Dr. Madhu Kandarpa
Internal Medicine - Nephrology & Dialysis
2 doctors agree
In brief: Not exactly
Chronic renal failure in late stages may present with polyurea.
Acute renal failure especially acute tubular necrosis may present with low urine output but need not be the case always. Acute renal failure during recovery phase may also be polyuric.

In brief: Not exactly
Chronic renal failure in late stages may present with polyurea.
Acute renal failure especially acute tubular necrosis may present with low urine output but need not be the case always. Acute renal failure during recovery phase may also be polyuric.
Dr. Madhu Kandarpa
Dr. Madhu Kandarpa
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Dr. James Cain
Internal Medicine - Nephrology & Dialysis
1 doctor agrees
In brief: Concentration loss
The kidney loses concentrating ability also, so that at a certain stage of renal failure polyluria can be the main complaint.
Usually at night. (nocturia), when too much urine production interupts sleep.

In brief: Concentration loss
The kidney loses concentrating ability also, so that at a certain stage of renal failure polyluria can be the main complaint.
Usually at night. (nocturia), when too much urine production interupts sleep.
Dr. James Cain
Dr. James Cain
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