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HelpPhosphatidylethanol Confirmation, Blood
Additional Codes
Orderable Codes:
| Epic Code | Atlas Code | Mayo Test ID | Order LOINC |
| LAB17785 | LAB17785 | PETH | 101506-4 |
Result Component(s):
| Reporting Name | Epic Code | Atlas Code | Mayo Test ID | Result LOINC |
| PEth 16:0/18:1 (POPEth) by LC-MS/MS | 12301020825 | M617481 | 617481 | 97607-6 |
| PEth 16:0/18:2 (PLPEth) by LC-MS/MS | 12301020826 | M617482 | 617482 | 97606-8 |
| PEth Interpretation | 12301020827 | M617483 | 617483 | 69050-3 |
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) to cleanse site before specimen collection.
2. Draw blood in tubes smaller than 10 mL if possible.
3. Do not centrifuge.
4. 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 |
|---|---|---|
| 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 daysSpecimen Retention Time
14 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
G0480
80321 (if appropriate for select payers)
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 |
NY State Approved
YesForms
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)