Porphyrins, quantitative, 24 hour urine-13486

Test info

  
Porphyrins, quantitative, 24 hour urine
  
13486
  
LAB13486
  
PORPH24UR
  
Coproporphyrin
Uroporphyrin
  
  • Coproporphyrins I
  • Coproporphyrins III
  • Heptacarboxylporphyrins
  • Hexacarboxylporphyrins
  • Pentacarboxylporphyrins
  • Uroporphyrins
  

Evaluate porphyrias, including those involving deficiencies of enzymes which are needed for heme synthesis and chemical porphyrias.

Specimen

  
Urine, 24 hr
  
1.5 mL
  
  
  1. Mix 24 hr collection well
  2. Measure and record total urine volume
  3. Transfer a 2mL (minimum 1.5mL) aliquot into an Amber screw-cap polypropylene frozen transport tube/vial - 4mL (LabCorp)
  4. Label with patient name and 2nd ID, source and total volume.
  5. If amber transport tubes are unavailable, cover transport tube completely, top and bottom, with aluminum foil. Identify specimen with patient's name directly on the amber transport tube AND on the outside of the aluminum foil and secure with tape.
  6. Freeze
  
  • Total volume
  

Protect from light

Frozen (preferred) - 14 days

Refrigerated - 7 days

Ambient - NO

 

  
  • Stored specimen not refrigerated
  • Specimen exposed to light
  • Acid preservative
  • pH <3

Performance

  
LabCorp Burlington (003194): R-LC
  
Mo - Fr
  
3 - 4 days
  

High-pressure liquid chromatography (HPLC) with fluorometric detection

Clinical and Interpretive info

  

 

Coproporphyrin (CP) I: 0−24 μg/24 hrs
Coproporphyrin (CP) III: 0−74 μg/24 hrs
Heptacarboxylporphyrins (7-CP): 0−4 μg/24 hrs
Hexacarboxylporphyrins (6-CP): 0−1 μg/24 hrs
Pentacarboxylporphyrins (5-CP): 0−4 μg/24 hrs
Uroporphyrins (UP): 0−24 μg/24 hrs

Billing

  
84120
  
Result 11228-4

Tracking

  
04/11/2019
  
12/14/2019