Carbohydrate Deficient Transferrin (CDT), Adult

Abbrev Code:CDTS   
Order Code:LAB961Order Name:Carbohydrate Deficient Transferrin,
Synonyms:Transferrin for Carbohydrate Deficient Transferrin
Methodology:Affinity chromatography/Mass spectrometry
CPT Codes: 82373 x1
Turnaround Time:Specimens are sent to reference laboratory Mon-Fri; results are reported within 5-10 days.
Special Instructions:This test is primarily an indicator of chronic alcohol abuse. Please provide patient's age on request form. Also indicate the reason for referral if the patient is less than 21 years of age. For pediatric patients, please see Carbohydrate Deficient Transferrin, for Congenital Disorders of Glycosylation, Serum.

This test was developed and its performance characteristics determined by Laboratory Medicine and Pathology, Mayo Clinic. This test has not been cleared by the U.S. Food and Drug Administration.

Collection Instructions

Optimal Volume:0.3 mL
Minimum\Peds Volume:0.3 mL
Container:Red (no gel)
Alternate Containers: Red or gold (gel)

Processing and Shipping

Specimen Processing:Centrifuge and aliquot 0.1 mL, 0.05 mL minimum. Samples are stable refrigerated for 28 days.
Shipping Instructions:Ship on dry ice.
Stability:7 days at room temperature; 28 days refrigerated; 45 days frozen (preferred).
Test Performed at or Referral Lab Lab Sendouts  (Mayo)
Referral Lab number:CDTA


Reference Range:Less than or equal to 0.10 0.11 - 0.12 (indeterminate)
Use:An indicator of chronic alcohol abuse. Patients with chronic alcoholism may develop abnormally glycosylated transferrin isoforms (i.e. CDT >0.12). CDT results from 0.11-0.12 are considered indeterminate. Patients with liver disease due to genetic or nongenetic causes may also have abnormal results.

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