Laboratory Medicine Program

Citrate

Clinical Decription:
Urinary citrate is clinically useful in assessing the risk of recurrent kidney stone formation because citrate inhibits stone formation growth.
<br/><em>Warty VS, Busch R, Mohamed AV. A kit for citrate in food stuffs adapted for assay of serum and urine. Clin Chem, 1984;30:1231-1233. Grass L, Locke S, Rapoport A, oreopoulos D. Cabrimetric and enzymatic methods compared for assay of citrate in urine. Clin Chem, 1987;33:1074.</em>

Method: Automated method; c8000

Component Tests Used: n/a

Reference Ranges Used:
> 1.6 mmol/d

Specimen Type: Urine 24 hour
Volume: 10 mL aliquo mL (minimum: 1.0 mL mL)

Shipping: 4C

Special Instructions: Discard first morning sample, collect all other urine for a 24 hour period, to include second morning sample. Record volume and aliquot.

Testing Schedule(s): Weekly.

Turnaround Time: 5 days

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