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HelpOrderable Name PETH Phosphatidylethanol Confirmation, Blood
Specimen Required
Container/Tube: Lavender top (EDTA)
Specimen Volume: 1 mL
Collection Instructions:
1. Do not use alcohol to clean arm. Use alternative (such as Betadine, also known as Povidone Iodine, or any non-alcoholic approved antiseptic) to cleanse site before specimen collection.
2. Do not centrifuge.
3. Send whole blood specimen in original tube. Do not aliquot.
Useful For
Verifying abstinence or use of ethanol, especially in liver transplant candidates/patients
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Specimen Type
Whole Blood EDTASpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood EDTA | Frozen (preferred) | 28 days |
| Refrigerated | 14 days |
Reject Due To
| Gross lipemia | OK |
| Gross icterus | OK |
Reference Values
Negative (<10 ng/mL)
Cutoff concentrations by liquid chromatography tandem mass spectrometry:
PEth 16:0/18:1 (POPEth): 10 ng/mL
PEth 16:0/18:2 (PLPEth): 10 ng/mL
Day(s) Performed
Monday through Sunday
Report Available
2 to 5 daysCPT Code Information
80321
G0480 (if appropriate)
Forms
If not ordering electronically, complete, print, and send 1 of the following with the specimen:
-Therapeutics Test Request (T831)
-General Test Request (T239)
-Renal Diagnostics Test Request (T830)