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.

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

Methodology

Quantitative High Performance Liquid Chromatography (HPLC)
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Reference Range

Coproporphyrin, Feces 0-45 nmol/g dry weight
Protoporphyrin, Feces 0-100 nmol/g dry weight
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Performing Laboratory

ARUP Reference Laboratory
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New York DOH Approval Status

Yes
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