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Test Code TTM Thrombin Time (Bovine), Plasma

Additional Codes

 

MAYO Test ID

TT

EPIC Test ID

LAB324

 

Reporting Name

Thrombin Time (Bovine), P

Useful For

The main utility of the thrombin time test is to detect or exclude the presence of heparin or heparin-like anticoagulants (which act by enhancing antithrombin's inhibition of thrombin and other procoagulant enzymes) when used in conjunction with the reptilase time (RT) in evaluating unexplained prolonged clotting times.

 

Identifying the cause of a prolonged prothrombin time, activated partial thromboplastin time, or dilute Russell's viper venom time when used in conjunction with the RT and fibrinogen assay

Method Name

Clot-Based Assay

Measures time of fibrinogen to fibrin conversion after adding bovine thrombin

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Plasma Na Cit


Specimen Required


See Coagulation Studies in Special Instructions.

 

Specimen Type: Platelet-poor plasma

Collection Container/Tube: Light-blue top (citrate)

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Spin down, remove plasma, and spin plasma again.

2. Freeze specimen immediately at ≤-40° C, if possible.

Additional Information:

1. Double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious results.

2. Each coagulation assay requested should have its own vial.


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma Na Cit Frozen 14 days

Reject Due To

Hemolysis

Mild OK; Gross reject

Lipemia

Mild OK; Gross reject

Icterus

Mild OK; Gross reject

Other

NA

Special Instructions

Reference Values

15-23 seconds

Day(s) and Time(s) Performed

Monday through Friday

CPT Code Information

85670

LOINC Code Information

Test ID Test Order Name Order LOINC Value
TT Thrombin Time (Bovine), P 46717-5

 

Result ID Test Result Name Result LOINC Value
TT Thrombin Time (Bovine), P 46717-5

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

Analytic Time

2 hours