Test Details
Mnemonic
PORPF
Ordering Code
3600377
CPT-4 Code(s)
84126
Specimen Information
Collect
Random stool
Specimen Preparation
Protect from light during collection, storage, and ship.
Wrap stool container in foil immediately after collection. Send 5.0 g stool frozen in screw capped
plastic container. CRITICAL FROZEN.
Wrap stool container in foil immediately after collection. Send 5.0 g stool frozen in screw capped
plastic container. CRITICAL FROZEN.
Minimum Volume
1.0 g stool
Transport Temperature
CRITICAL FROZEN
Rejection Criteria
Complete timed collections (24-72 hour). Specimens stored in one gallon cans or other large containers. Liquid stool, specimen not protected from light.
Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 3 weeks
Refrigerated: Unacceptable
Frozen: 3 weeks
Methodology
Quantitative High Performance Liquid Chromatography (HPLC)
Reference Range
Coproporphyrin, Feces 0-45 nmol/g dry weight
Protoporphyrin, Feces 0-100 nmol/g dry weight
Protoporphyrin, Feces 0-100 nmol/g dry weight
Performing Laboratory
ARUP
New York DOH Approval Status
Yes