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Test Code PQNRU Porphyrins, Quantitative, Random, Urine

Important Note

CMH Cerner Order: Ref Misc


Ordering Guidance


This random urine test should be ordered when the specimen will reach Mayo Clinic Laboratories within 72 hours. If transportation will take longer than 72 hours, order PQNU / Porphyrins, Quantitative, 24 Hour, Urine and follow collection guidelines.



Shipping Instructions


Ship specimen in amber bottle to protect from light.



Necessary Information


Include a list of medications the patient is currently taking.



Specimen Required


Patient Preparation: Patient should not consume any alcohol for the 24 hours before specimen collection.

Supplies: Urine Container - Amber, 60 mL (T596)

Container/Tube: Amber, 60-mL urine container

Specimen Volume: 20 to 50 mL

Collection Instructions: Collect a random urine specimen.


Children's Mercy Hospital Note:

CMH COLLECTION: 15mL urine in a sterile cup, protected from light

Specimen Minimum Volume

15 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Frozen 72 hours LIGHT PROTECTED

Testing Algorithm

The following algorithms are available:

-Porphyria (Acute) Testing Algorithm

 

-Porphyria (Cutaneous) Testing Algorithm 

 

Useful For

Preferred test to begin assessment for congenital erythropoietic porphyria and porphyria cutanea tarda and during symptomatic periods for acute intermittent porphyria, hereditary coproporphyria, and variegate porphyria when specimen transport will not exceed 72 hours

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Day(s) Performed

Monday through Friday

Report Available

2 to 4 days

Reporting Name

Porphyrins, QN, Random, U

Reference Values

Uroporphyrins, Octacarboxyl:

≤30 nmol/L

 

Heptacarboxylporphyrins:

≤7 nmol/L

 

Hexacarboxylporphyrins:

≤2 nmol/L

 

Pentacarboxyporphyrins:

≤5 nmol/L

 

Copropprphyrin, Tetracboxyl:

≤110 nmol/L

 

Porphobilinogen:

≤1.3 mcmol/L

Method Name

High-Performance Liquid Chromatography (HPLC) with Fluorometric Detection/Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

84110-Porphobilinogen, quantitative

84120-Porphyrins, quantitation and fractionation