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Test Code LAB324 Thrombin Time

Useful For

The thrombin time is used to screen for abnormalities in the conversion of fibrinogen to fibrin.  These may be caused by qualitative or quantitative abnormalities of fibrinogen or by inhibitors, such as heparin or fibrin/fibrinogen split products.

Performing Laboratory

Asante Rogue Regional Medical Center (ARRMC)

 

Performing Department

Hematology

Specimen Required

Blue top tube - Refer to ORDER OF DRAW

 

Note:  The ratio of blood to anticoagulant is critical.

Vacutainers must draw their full volume.

Syringe Draw:     

2.7 mL blood in 3 mL Blue top tube

1.8 mL blood in 2 mL Blue top tube

 

Specimens will not be accepted if tubes are not filled to their correct volume.

If multiple tests are drawn, draw coagulation studies first or second

Specimen Minimum Volume

1 properly filled 2 mL Blue top tube

Specimen Stability Information

Specimen stable 4 hours unopened or opened, room temperature or refrigerated

Reject Due To

  • Icterus
  • Lipemia
  • Hemolysis
  • Quantity not sufficient (QNS)
  • Lacking Two Patient Identifiers:
    • 1-Patient's First & Last name 
    • 2-Patient's Date of Birth

Day(s) Performed

Monday through Sunday 

Routine - within 6 hours after receipt of specimen in lab

ASAP - 2 hours after receipt of specimen in lab

STAT - 1 hour after receipt of specimen in lab

Method Name

Turbidimetric clot detection by measuring change in optical density

CPT Code Information

85670  -  Thrombin time; plasma

Billing Code

2010700