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Epic Code LAB1230581 Thrombin Time

Important Note

There is currently a nationwide shortage of this tube. Please take steps to ensure specimen integrity to reduce recollection. Specimen Tube Shortage (link)

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

Interface Order Alias

1230581

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)

Rejection Criteria

  • Hemolysis
  • Specimen has been thawed

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

LOINC

3243-3

Beaker LOINC

THROMBIN TIME: 3243-3

Mayo Access Code

SHO1230581

Reviewed Date

10/11/2021

Beaker Names

Beaker Procedure Name: THROMBIN TIME
Beaker Display Name: Thrombin Time
BEAKER TEST NAME: Thrombin Time
BEAKER TEST REPORT NAME: Thrombin Time

Beaker Synonyms

TT|THROMBIN TIME

Beaker Collection and Specimen Handling

BEAKER COLLECTION: +(1)S10/PO/F

Beaker Location, Container and Temperature

BW COAGULATION: BLUE TOP TUBE