ARUP's Laboratory Test Directory

0080460: Porphyrins, Urine

Test Mnemonic: POR URINE
Methodology: High Performance Liquid Chromatography

Performed: Sun, Tue-Sat

Reported: 1-4 days

Specimen Required:  
Collect: 24-hour or random urine. Refrigerate 24-hour specimens during collection.

Transport: 4.5 mL aliquot, frozen. (Min: 3.5 mL) Submit specimen in an ARUP Amber Transport Tube.

Pediatric Collection/Transport: 2 mL aliquot of urine, frozen.

Remarks: The most important aspect of specimen preservation is adequate refrigeration during collection, storage, and transport.  Protect from light during collection, storage, and shipment.  Record total volume and collection time interval on transport tube and test request form.

Stability: Ambient: Unacceptable; Refrigerated: 4 days; Frozen: 1 month

Reference Interval:
 
Test Number Components Reference Interval
 Uroporphyrin0-4 µmol/mol crt
 Heptacarboxylate Porphyrin 0-2 µmol/mol crt
 Coproporphyrin0-22 µmol/mol crt
 Creatinine (24-hour)  
 
Male Female
3-8 years: 140-700 mg/d
9-12 years: 300-1300 mg/d
13-17 years: 500-2300 mg/d
18-50 years: 1000-2500 mg/d
51-80 years: 800-2100 mg/d
81 years and older: 600-2000 mg/d 		3-8 years: 140-700 mg/d
9-12 years: 300-1300 mg/d
13-17 years: 400-1600 mg/d
18-50 years: 700-1600 mg/d
51-80 years: 500-1400 mg/d
81 years and older: 400-1300 mg/d

Note:
Urine porphyrins are useful for the evaluation of cutaneous photosensitivity to exclude porphyria cutanea tarda (PCT). Evaluation of neurologic and/or psychiatric symptoms associated with acute porphyrias such as acute intermittent porphyria (AIP) requires urine porphobilinogen (PBG) testing. Refer to Porphobilinogen (PBG), Urine (0080260). 

CPT Code(s):
84120

 

 

 
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