Test Overview
Clinical Utility
Quantitation will be performed and billed (see separate listing) when the screen is positive.
Method
Spectrophotometry
Result Included
Creatinine; Porphyrin Screen
Specimen
Specimen Type
Urine (24 hr)Volume
Sample Volume
20 mL
Collection & Handling
Collection Instructions
Collect 24 hour urine with 5 g sodium carbonate. Final pH should be 7 to 10. Keep cool during collection and protect from light.
Handling Information
Store and submit specimen protected from light.
Additional Information
Specimen aliquot must be labelled inside and outside light-protecting wrap. Provided volume (in litres) and collection date. This collection is not suitable forALA/PBG testing.
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Not protected from light |
Performance & Interpretation
Turnaround Time
6 days
Results
Name
Units
Reference Range
Conversion
-
Creatininemmol/dMale, ≥18 y: 7.1 - 17.7
Female, ≥18 y: 5.3 - 15.9
Creatinine reference values are not available for individuals ≤17 y -
Porphyrin ScreenQualitative TestNormal
Referral Location
Canada
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| PORPHS U | Creatinine 24h Urine Porphyrin Screen | 20251 | mmol/d |
| Porphyrin Screen - 24h Urine | 20252 |
Test Version
Last Updated
2021-06-26