The test method changed on 1/3/2023. If this test has been used for serial monitoring, rebaselining is recommended. Rebaselining consists of 2 measurements, collected 3-6 weeks apart.
The Roche Elecsys CEA assay is an electrochemiluminescence immunoassay "ECLIA" performed on the Roche Cobas "e" immunoassy analyzers.
Values obtained with different assay methods may be different and cannot be used interchangeably.

Biotin supplements may cause clinically significant interference for this test assay. If interference is suspected, it is strongly recomended that biotin is discontinued for at least one week prior to retesting

Gold serum separator (SST) tube

Immediately following collection, thoroughly mix sample by gently inverting 5 times

1. Allow sample to clot for a minimum of 30 minutes
2. Spin within two (2) hours of sample collection

Gold serum separator (SST) tube

Red serum vial/tube, 5 mL

Lt green plasma separator (PST)

Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 

Red:

1. Allow sample to clot
2. Spin
3. Transfer serum to a False bottom plasma/serum transport vial/tube (AHL), labelled as serum, within two (2) hours of sample collection

Lt green:

1. Spin within two (2) hours of sample collection

Lt green plasma separator (PST)

False bottom plasma/serum transport vial/tube (AHL)

Refrigerated - 5 days

Ambient - 8 hours

Frozen - 24 weeks

• Improper labels (unlabeled or mislabeled)
• Hemolysis (some procedures)
• Improper anticoagulant or ratio
• Delay in transport
• Improper storage temperature affecting results
• Improper container
• Leaking container resulting in compromised specimen
• Quantity not sufficient (QNS)

Electrochemiluminescence immunoassay (ECLIA)

< 38.2 U/mL

Medical necessity