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Laboratory Test Reference Guide

Laboratory Information

Test Name

Porphyrin Screen urine

Synonyms

urine porphyrin screen
pbg
acute porphyrin screen
porphobilinogen
porphyria screen
total porphyrin screen

External Price (excl. GST)

Price

$37.57

Constituent Tests

Specimen Collection

Adult Specimen

Random Urine Nil preservative. Protect from light. Best taken at time of symptoms.

Sample Delivery to Lab

Protect from light

Instructions for Referral to Waikato Lab

Aliquot Instructions

Please send pottle, not tube aliquot, require minimum 10ml.

Aliquot Transport

Frozen, protect from light.

Test Information

Department

Biochemistry

Test Availability

Weekly

Laboratory Turnaround Time

1 week

Reference Interval

PBG Screen: Nil detected.
Total urine porphyrin: <320nmol/L
Porphyrin:Creatinine Ratio: <40nmol/L

Reference Interval Attachments

Uncertainty Of Measurement

10%

Additional Information

Porphobilinogen analysis is done as part of the urine porphyrin screen. Screen positive PBG samples will be referred for confirmation and quantification.

Screen positive urine porphyrin specimens will be forwarded to LabPlus for confirmation by HPLC.

Porphyrin screening requires testing of urine, faeces and blood, ideally collected when symptomatic.

Minimum Volume

10mL

Electronic Information

Registration Code

PORUP

HL7Mapping Code

$PORUP