Fibrinogen Degradation Products (FDP), Plasma

CPT: 85362
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Test Details

Synonyms

  • FDP, Plasma

Use

Under normal conditions, the fibrinolytic process is localized on the fibrin clots because alpha2-antiplasmin and the plasminogen activator inhibitors prevent fibrinolysis from spreading. During disseminated intravascular coagulation (DIC), fibrinolysis spreads and becomes systemic, in which case the degradation of circulating fibrinogen will occur. Fragments that occur are very heterogeneous: products derived from fibrin, soluble completes, degradation products from fibrinogen, and from nonstabilized fibrin. An abnormal fibrinolytic and/or fibrinogenolytic activity shown by high levels of FDP in plasma can also be found in clinical states, such as eclampsia, carcinoma (promyelocytic leukemia), postoperative complications, cardiac and renal disorders, hepatic disorders, fibrinolysis, pulmonary embolism, and deep vein thrombosis (DVT). Positive result indicates the presence of FDP at a concentration ≥2.5 mg/mL. This test should not be used to rule out venous thromboembolism.

Methodology

Latex agglutination (LA)

Reference Interval

<5 μg/mL

Specimen Requirements

Specimen

Plasma, frozen

Volume

2 mL

Minimum Volume

1 mL

Container

Blue-top (sodium citrate) tube

Collection

Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.1 Evacuated collection tubes must be filled to completion to ensure a proper blood-to-anticoagulant ratio.2,3 The sample should be mixed immediately by gentle inversion at least six times to ensure adequate mixing of the anticoagulant with the blood. A discard tube is not required prior to collection of coagulation samples unless the sample is collected using a winged (butterfly) collection system. With a winged blood collection set a discard tube should be drawn first to account for the dead space of the tubing and prevent under-filling of the evacuated tube.4,5 When noncitrate tubes are collected for other tests, collect sterile and nonadditive (red-top) tubes prior to citrate (blue-top) tubes. Any tube containing an alternative anticoagulant should be collected after the blue-top tube. Gel-barrier tubes and serum tubes with clot initiators should also be collected after the citrate tubes. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.

Please print and use the Volume Guide for Coagulation Testing to ensure proper draw volume.

Storage Instructions

Freeze

Clinical Information

Special Instructions

If the patient's hematocrit exceeds 55%, the volume of citrate in the collection tube must be adjusted. Refer to Coagulation Collection Procedures for directions.

Footnotes

1. Adcock DM, Kressin DC, Marlar RA. Effect of 3.2% vs 3.8% sodium citrate concentration on routine coagulation testing. Am J Clin Pathol. 1997; 107(1):105-110. 8980376
2. Reneke J, Etzell J, Leslie S, et al. Prolonged prothrombin time and activated partial thromboplastin time due to underfilled specimen tubes with 109 mmol/L (3.2%) citrate anticoagulant. Am J Clin Pathol. 1998; 109(6):754-757. 9620035
3. National Committee for Clinical Laboratory Standardization. Collection, Transport, and Processing of Blood Specimens for Coagulation Testing and General Performance of Coagulation Assays; Approved Guideline. 5th ed. Villanova, Pa: NCCLS; 2008. Document H21-A5:28(5).
4. Gottfried EL, Adachi MM. Prothrombin time and activated partial thromboplastin time can be performed on the first tube. Am J Clin Pathol. 1997; 107(6):681-683. 9169665
5. McGlasson DL, More L, Best HA, et al. Drawing specimens for coagulation testing: Is a second tube necessary? Clin Lab Sci. 1999; 12(3):137-139.10539100

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
115402 FDP, Plasma 30226-5 115402 FDP, Plasma ug/mL 30226-5

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