Home
HelpTest ID 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 alternatives such as Betadine or ChloraPrep to cleanse arm before collecting any specimen.
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)
Reporting Name
Phosphatidylethanol Confirmation, BSpecimen Type
Whole Blood EDTASpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole Blood EDTA | Frozen (preferred) | 28 days | |
| Refrigerated | 14 days |
Reference Values
Negative (<10 ng/mL)
PEth 16:0/18:1 (POPEth): Lower limit of quantification =10 ng/mL
PEth 16:0/18:2 (PLPEth): Lower limit of quantification =10 ng/mL
Day(s) Performed
Monday through Sunday
Report Available
2 to 5 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.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)