Citric acid, random urine

Alphabetical Test listing

Citric acid, random urine-994

  
Citric acid, random urine
  
994
  
LAB994
  
MSO
  
Citrate, random urine
Citrate excretion, random urine
  

A timed 24-hour urine collection is the preferred specimen for measuring and interpreting this urinary analyte. Random collections normalized to urinary creatinine may be of some clinical use in patients who cannot collect a 24-hour specimen, typically small children.

The mean urinary citrate excretion rate in patients with idiopathic calcium urolithiasis has been found to be significantly lower than that of control groups. Hypocitraturia is common in patients with urolithiasis resulting from renal tubular acidosis and in patients with enteric hyperoxaluria. Citrate excretion is low in renal insufficiency.

  
Urine, random
  
  
10 mL
  
2.5 mL
  

Transfer sample to a  Urine Monovette with pH stabilizer

  
  

If a Urine Monovette with pH stabilizer is unavailable, transfer the specimen to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp) and freeze

  

Specimen preserved in Urine Monovette with pH stabilizer

Refrigerated (preferred) - 14 days

Ambient - 14 days

Frozen - 14 days

Freeze/thaw cycles - Stable x3

Unpreserved specimen

Frozen (strict) - 14 days

  
1 week
  
  • If specimen is not Frozen; pH must be between 1-3
  
LabCorp Burlington (123866): R-NX
  
Mo - Fr
  
2 - 5 days
  

Spectrophotometry (kinetic at 340 nm)

  
Gender Age (years) Range (mg/L)
Male <40 9 - 864
  ≥40 7 - 1130
Female <40 40 -1930
  ≥40 10 -1560
  
82507
  
09/29/2020
  
09/30/2020