What is the role of spot urine collection in the workup of hyperuricemia?

Updated: Aug 31, 2018
  • Author: James W Lohr, MD; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

If a 24-hour urine collection is not possible, measure the ratio of uric acid to creatinine from a spot urine collection. A ratio greater than 0.8 indicates overproduction.

The ratio also helps differentiate acute uric acid nephropathy from the hyperuricemia that occurs secondary to renal failure. The ratio is greater than 0.9 in acute uric acid nephropathy and usually less than 0.7 in hyperuricemia secondary to renal insufficiency.


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