Laboratory Test Information Guide

Details for Porphyrins-Quantitation, Stool

Test Name: Porphyrins-Quantitation, Stool
Alternate Name(s): Porphyrins: Quantitation, Stool (Random)
Laboratory: Core (VH)
Specimen Type: Faeces
Collection Information: Note: Quantitative analysis may only be done if a preliminary Porphyrin screen is positive.

Collect a minimum of 50g of faeces in a sterile container.

Protect specimen from light.

Specimen must be labelled inside and outside of the light-protecting wrap.

Store and send frozen.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
7 days
Stat
 
 
Reference Range: Coproporphyrin I:
Less than 13 nmol/g

Coproporphyrin III:
Less than 12 nmol/g

Uroporphyrin I:
Less than 5 nmol/g

Uroporphyrin III:
Less than 1 nmol/g

Heptacarboxylic Acid:
Less than 1 nmol/g

Hexacarboxylic Acid:
Less than 1 nmol/g

Pentacarboxylic Acid:
Less than 1 nmol/g

Deuteroporphyrin:
Less than 14 nmol/g

Mesoporphyrin:
Less than 6 nmol/g

Protoporphyrin:
Less than 38 nmol/g
Effective Date: 2012-12-10
Revised Date:  
Critical Value:  
Interpretive Comments: Porphyrin reference values are not available for individuals 17 years of age and younger.
Special Processing:  
Comments: Referred out Monday - Thursday
Method of Analysis: HPLC
Critical Information Required:  
Storage & Shipment: Protect from light and store and send frozen specimen.
System Codes: 
Cerner
PORST
 
Referred To: In-Common Laboratories

Questions? Comments? Contact Laura Gopaul