Fractional excretion of uric acid: FJHN / gout / hereditary renal hypouricaemia

The fractional excretion of uric acid collection is decreased in gout and familial juvenile hyperuricaemia, also known as autosomal dominant tubulointerstitial kidney disease (ADTKD).
Clinical details: 
The fractional excretion of uric acid (FEur) is decreased in under-excreting gout and autosomal dominant tubulointerstitial kidney disease. FEur may be dramatically increased in patients with hereditary renal hypouricaemia.
Reference range: 

Please contact the laboratory to discuss

24h urine collection
Sample type and Volume required: 
EDTA (purple top) and Lithium heparin (green top), 24 h urine collected with thymol
Turnaround time: 
3 weeks
Storage and transport: 
10ml aliquot of warmed ( sink of hot water, 30min), well mixed 24h urine, store in fridge or freezer, can thaw in 1st class post.
Purine Research Laboratory at St Thomas'
020 7188 1266
St Thomas’ Hospital
North Wing - 4th Floor
Westminster Bridge Road
London SE1 7EH
For clinical advice or interpretation of results, please contact the laboratory in the first instance.

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Last updated: 15/12/2015