Porphyrins, Total with Reflex to Porphyrins Fractionation, Plasma
Also known as: PORPH TOT
Use
This test is used to evaluate patients for porphyrias by measuring total porphyrins in plasma. If the total porphyrin concentration exceeds 1.0 mcg/dL, plasma porphyrin fractionation is automatically performed to identify the specific types of porphyrins present, which assists in the diagnosis of specific types of porphyria, such as porphyria cutanea tarda.
Special Instructions
Patients should abstain from alcohol for 24 hours prior to specimen collection. Specimens must be protected from light and submitted as plasma in an ARUP amber transport tube. An additional charge applies if fractionation is performed due to elevated total porphyrins.
Limitations
This test is not suitable for the evaluation of all types of porphyrias. Specimens collected in separator tubes or those not protected from light are unacceptable. The test is performed by Mayo Clinic Laboratories and has not been cleared or approved by the U.S. Food and Drug Administration.
New York Approved
Methodology
Other
Biomarkers
LOINC Codes
- 2815-9
- 59462-2
Result Turnaround Time
3-8 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
3 mL
Minimum Volume
1 mL
Container
ARUP amber transport tube
Collection Instructions
Collect specimen using a green (sodium or lithium heparin) or lavender (EDTA) tube. Transfer plasma to an ARUP amber transport tube immediately and freeze.
Patient Preparation
Patient should abstain from alcohol for 24 hours prior to collection.
Storage Instructions
Critical frozen. Specimens must be protected from light.
Causes for Rejection
Separator tubes, specimens not protected from light.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | Unacceptable |
| Frozen | 2 weeks |