ARUP's Laboratory Test Directory

Porphyrins, Fecal : 0099824

Mnemonic: POR FECES

Methodology: High Performance Liquid Chromatography
Performed: Tue, Sat
Reported: 2-7 days
Specimen Required: Collect:  Random stool. Freeze immediately.

Transport:  5 g stool, frozen. (Min: 1 g). CRITICAL - Protect from light.

Pediatric Collection/Transport:  1 g stool, frozen. CRITICAL - Protect from light.

Remarks:  CRITICAL FROZEN.  Freeze sample immediately after collection. Protect from light during collection, storage, and shipment. Wrap in foil ASAP to protect from light.

Unacceptable Conditions:  Complete timed collections (24-72 hour).  Samples stored in one gallon cans, large containers or liquid stool.

Stability:  Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 3 weeks
Reference Interval:
 
Test Number Components Reference Interval
 Coproporphyrin0-45 nmol/g dry weight
 Protoporphyrin0-100 nmol/g dry weight

Note: Bacterial modification of fecal porphyrins is extensive.  The recommended specimen for uroporphyrin and coproporphyrin is urine (random or 24-hour). Refer to Porphyrins, Urine (0080460).  The recommended specimen for protoporphyrin is serum.  Refer to Porphyrins, Serum Total (0080429). 
CPT Code(s): 84126
 
 

 

 

 
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