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Test Code LAB11230581 Thrombin Time

Important Note

Please note:  Hirudin, argatroban, dabigatran, bilvalrudin, and heparin may cause interference.  Please do not draw from heparinized lines, syringes, etc.

Test Name Alias

Thrombin Time | TT

Clinical Information

Intended Use:  The quantitative determination of the thrombin time in citrated human plasma.  Thrombin Time is suitable for monitoring fibrinolysis therapy, screening for disorders of fibrin formation and in cases of suspected fibrinogen deficiency states.  It is also useful for the differentiation between a heparin induced prolongation of the thrombin time and fibrin formation disorders.

Icons & Photos

Collection Instructions

Specimen Collection: Blood

 

Container(s): 3.2% Na Citrate Tube (blue top)

Preferred Volume to Collect: 2.7 mL (full tube)

Minimum Volume to Collect: 1.8 mL (full tube)

Capillary collect ok: No

Microtainer acceptable: No

 

Collection Instructions:

  • Hirudin, argatroban, dabigatran, bilvalrudin, and heparin may cause interference.  Please do not draw from heparinized lines, syringes, etc.

  • Detailed instructions (link): Anticoagulant Correction for High Hematocrit

  • Detailed instructions (link): Blue Citrate Tube

  • Specimen should be processed within 1 hour  – See Processing Instructions below.

 

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Platelet Poor Plasma

Centrifuge/Spin: Yes

Aliquot: Yes

 

Processing Instructions:

 

Transport Temperature:

  • Ambient (up to 1 hour in whole blood state)
  • Frozen (plasma only)

Specimen Stability

Ambient: 1 hour

Frozen: 2 months

Laboratory Retention: 2 months

Test Frequency

Available Monday through Friday, usual TAT 1 to 4 days

Reference Range

16 to 21 seconds

 

Pediatric Reference ranges have not been established

Performing Department

COAGULATION

Performing Department Laboratory Location

Spectrum Health Regional Laboratory, Grand Rapids, MI

Methodology

Thrombin Time (TT) Clot based assay with Siemens BC Thrombin Reagent

CPT

85670

CDM Code

80106054

Epic Test ID

1230102199

Interface Order Alias

1230581

LOINC

3243-3

Mayo Access Code

SHO1230581

Reviewed Date

3/3/2020