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HelpPhosphatidylethanol Confirmation, Blood
Additional Codes
LAB4393
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.
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 |
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 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80321
G0480 (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PETH | Phosphatidylethanol Confirmation, B | 101506-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 617481 | PEth 16:0/18:1 (POPEth) by LC-MS/MS | 97607-6 |
| 617482 | PEth 16:0/18:2 (PLPEth) by LC-MS/MS | 97606-8 |
| 617483 | PEth Interpretation | 69050-3 |
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)