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Porphyrin, Quantitative - Urine

Source Urine
Mnemonic UPORQT and U24H
Specimen Requirements Extra-regional sites: see Porphyrin, Quantitative - Urine, Extra-regional

24 hour urine:
Submit 10 mL aliquot of 24 hour urine.
24 hour urine should be collected in an opaque container with 5 g Na Carbonate added to the container before the collection begins.
Vials of Na Carbonate preservative available from DSC Chemistry 403-770-3265.

Random urine:
The preferred sample for patients of all ages is 24 hour urine. For pediatric patients only, random collections are available at Alberta Children's Hospital. 

All samples are sent to DSC for analysis.
Aliquot must be protected from light by wrapping entire container in foil. Specimens not protected from light will be rejected.

Refrigerate during collection. 

 
Specimen Handling

Record 24 hour volume and collection (start & end) dates and times in space provided on requisition. 

pH must be >7.0.
RRL: Adjust pH with NaOH if necessary.

Record medication patient is taking on requisition.

 

Additional Information

Includes Coproporphyrin and Uroporphyrin.

Coproporphyrin and Uroporphyrin may be ordered individually.

 

Testing Location Analytical Toxicology
Testing Frequency Every two weeks

  
Alternate Name(s) Uroporphyrin
 
 
Reference Interval

Coproporphyrin

24-190 nmol/24 hours

Uroporphyrin

<36 nmol/24 hours

 Random sample: no reference interval available.