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Test Code TT Thrombin Time (TT)

Additional Codes

PathLab TT
Epic ID LAB324

 

Specimen Requirements

Preferred Collection Container: 

Light Blue (Citrate)

 

Collection Information: 

Collect one full blue top tube

 

Transport Information: 

  1. Spin down, remove plasma, spin plasma again, and place 1 mL of platelet-poor plasma in plastic vial. (Glass vial is not acceptable.) Note: Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results. 
  2. Freeze specimen immediately at ≤ -40° C, if possible.
  3. Send specimen frozen.

Note: Each coagulation assay requested should have its own vial.
 

 

Minimum Sample Volume: 

0.5 mL of plasma

Stability/Transport

Temperature Stability Preferred Transport
Refrigerated Not Acceptable  
Frozen 30 days X
Room Temp 2 hours  

 

Unacceptable Conditions

Hemolyzed or lipemic specimens.

Performing Lab

Pathology Laboratory

Methodology

Clot-Based Assay

Day(s) Performed

Daily

CPT Code Information

85670