|Values are valid only on day of printing.|
This test is recommended for screening patients for possible erythropoietic protoporphyria and X-linked dominant protoporphyria. In addition, it can be used for evaluation of iron-deficiency anemia and chronic lead intoxication. Testing begins with total erythrocyte porphyrins. If the result is <80 mcg/dL, it is normal and testing is complete.
If the total erythrocyte porphyrin value is > or =80 mcg/dL, the protoporphyrin fractionation (PPFE) assay will automatically be performed at an additional charge. The PPFE test results include free protoporphyrin and zinc-complexed protoporphyrin.
The following algorithms are available in Special Instructions:
-Porphyria (Acute) Testing Algorithm
-Porphyria (Cutaneous) Testing Algorithm
All porphyrin tests on whole blood can be performed on 1 draw tube.
Preferred: Green top (sodium heparin)
Acceptable: Dark blue top (metal free heparin) or green top (lithium heparin)
Specimen Volume: Full tube
1. Patient should abstain from alcohol for 24 hours.
2. Immediately place specimen on wet ice.
Additional Information: Include a list of medications the patient is currently taking.
1. New York Clients-Informed consent is required. Please document on the request form or electronic order that a copy is on file. An Informed Consent for Genetic Testing (T576) is available in Special Instructions.
2. If not ordering electronically, complete, print, and send a Neurology Test Request Form-General (T732) (http://www.mayomedicallaboratories.com/it-mmfiles/neurology-request-form.pdf)
Mild reject; Gross reject
|Whole blood||Refrigerated||7 days|