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Transferrin, Carbohydrate-deficient (Alcohol Use)
Test CodeCARDT
Alias/See Also
16985
CPT Codes
82373, 84466
Includes
CDT
Transferrin
% CDT
Transferrin
% CDT
Preferred Specimen
1 mL serum
Patient Preparation
Fasting preferred
Minimum Volume
0.5 mL
Instructions
Serum samples must be fully coagulated, centrifuged within 1 hour of collection, and must not contain any particles or traces of fibrin after centrifugation. Transfer serum to a clean, plastic, screw-cap vial.
Transport Container
Plastic screw-cap vial
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 24 hours
Refrigerated: 7 days
Frozen: 90 days
Refrigerated: 7 days
Frozen: 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Grossly icteric
Methodology
Nephelometry
Setup Schedule
Set up: Mon-Sat p.m.; Report available: Next day after receipt at the performing laboratory. Add two (2) days for transport.
Reference Range
CDT | 28.1-76.0 mg/L | |
Transferrin | 188-341 mg/dL | |
% CDT | <2.5 % |
Clinical Significance
Heavy alcohol use (defined as >4 or 5 beverages per day for two weeks or more) is commonly associated with elevated CDT levels as are certain liver diseases such as primary biliary cirrhosis and chronic active hepatitis and in some patients with genetic D variants of transferrin.
Performing Laboratory
Quest Diagnostics Nichols Institute |
14225 Newbrook Drive |
Chantilly, VA 20153 |
Last Updated: May 4, 2023