When is fractional excretion of urate on a low-purine diet test indicated in the assessment of hyperuricemia?

Updated: Nov 03, 2020
  • Author: James W Lohr, MD; Chief Editor: Vecihi Batuman, MD, FASN  more...
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This test should be used to investigate the degree of underexcretion in patients with hyperuricemia or gout in patients for whom the cause cannot be determined. The fractional excretion of urate is calculated by the following formula:

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