Test Code LABTHRTM Thrombin Time, Plasma

Additional Codes

Test Name in EPIC	EPIC Test Code	Mnemonic
THROMBIN TIME, PLASMA	LABTHRTM	THRTM

Electromechanical Clot Detection

Specimen Type: Platelet-poor plasma

Container/Tube:

Fill Blue top tube to the etched line located just below the cap of the tube.

Preferred: Full Light-blue top (3.2% sodium citrate)

Acceptable: Full Sodium citrate (BD® or Greiner tubes)

Specimen Volume: 1 mL

Specimen Minimum Volume: 0.5 mL

Collection Instructions:

1. Unacceptable specimens: Specimens that are short-draws, over-draws, clotted or hemolyzed may yield incorrect results.

2. If sending from a site spin down, remove top 2/3 of plasma, and spin plasma again in a polyproyplene (cloudy plastic) vial.

3. Aliquot top 3/4 and place platelet-poor plasma in a polypropylene (cloudy plastic) vial.

4. Glass vials are not acceptable for processing/transport/storage.

Additional Information:

1. Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results.

2. Send specimen ambient. If there is a delay in transport of > 8 hours, send specimen frozen.

Refrigerate NO/Frozen OK/Ambient* 8 hours OK

*Ambient 8 hours OK when patient is not on heparin therapy

Ambient 2 hours OK when patient is on heparin therapy (either Unfractionated (UFH) or Low Molecular Weight (LMW)).

Monday through Sunday

Coagulation-

SMDC Clinical Lab

85670

Normal range changes every year with lot change of Thrombin Time reagent. See patient chart copy for current range.