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Test Code 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 or ChloraPrep) to cleanse site before specimen collection.

2. Do not centrifuge.

3. Send whole blood specimen in original tube. Do not aliquot.


Secondary ID

617480

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, B

Specimen Type

Whole Blood EDTA

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
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 days

Performing 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)