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Orderable 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 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)

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)

 

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 days

CPT 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)