Uroporphyrinogen decarboxylase, whole blood-994
Test info
Uroporphyrinogen decarboxylase, whole blood
994
LAB994
MSO
Erythrohepatic Uroporphyria (EHUP)
Hepatoerythropoietic Porphyria (HEP)
Porphyria Cutanea Tarda (PCT)
Hepatoerythropoietic Porphyria (HEP)
Porphyria Cutanea Tarda (PCT)
Preferred test for the confirmation of a diagnosis of porphyria cutanea tarda type II and hepatoerythropoietic porphyria.
Specimen
- Patient should abstain from alcohol for 24 hours.
- Abstinence is essential for at least 24 hours as alcohol suppresses enzyme activity for 24 hours after ingestion.
Sodium heparin (Na hep) whole blood
4.0 mL
3.0 mL
Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times, to prevent clotting
Dk green Sodium heparin (Na hep), no gel
EDTA whole blood
Lithium heparin (Li hep) whole blood
Lithium heparin (Li hep) whole blood
Lavender (EDTA), 4mL
Dk green Lithium heparin (Li hep), no gel
Refrigerated (preferred) – 14 days
Ambient – 7 days
Frozen – NO
2 weeks
Gross hemolysis
Performance
Mayo Clinic Laboratories (UPGD): R-NX
Tu, Th
7 days
High-Performance Liquid Chromatography (HPLC)/Incubation of lysed erythrocytes
Clinical and Interpretive info
≥1.0 Relative units (RU) - normal
0.80 - 0.99 Relative units (RU) - indeterminate
<0.80 Relative units (RU) - indicative of PCT type II
Alcohol ingestion within 24 hours of specimen collection may lead to a false-positive result.
Billing
82657
Tracking
07/23/2021
01/02/2024
01/02/2024