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Test Code LAB4050 CARCINOEMBRYONIC ANTIGEN (CEA)

Specimen Type

Preferred Specimen:  Lithium Heparin Tube (Mint Green Top, Dark Green Top)
Alternative Specimen: Serum (SST, Gold, Corvac, Tiger, Red Top Tube)

 

Important: Lithium Heparin results are 7-8% higher than serum results. Use the same specimen type for serial measurements.

 

Specimen Volume

1 mL

Minimum Volume

0.5 mL

Turnaround Time

STAT: 1 hour
Routine : 4 hours

Test Schedule

Daily

Sample Stability

Room Temp: N/A
Refrigerated: 7 days
Frozen: 6 months

Method

Chemiluminescent microparticle immunoassay (CMIA) 

Reference Ranges

<5.00 ng/mL

Reporting Limit

Reporting Limits: 1.73 – 15,000.0 ng/mL

Synonyms

CEA; CARCINOEMBRYONIC ANTIGEN

CPT Codes

82378

Specimen Processing

Serum samples should be allowed to clot completely. Separate serum from cells ASAP and transport refrigerated.

Rejection Criteria

Grossly hemolyzed specimens.

LOINC Code

83085-1

IMO Code

IMO-PROC-30136052