Thrombin Time

Orderable EAP code:

LAB00233

Billable EAP Codes:

80001822 x 1

CPT Codes:

85670 x 1

Lab Section:

Core Lab

Turnaround Time:

Routine: 2 Hours
Urgent: 1 Hour

Test Schedule:

24 hours, 7 days a week.

Units:

Seconds

Specimen Requirements:

4.5 mL blood in a BLUE top tube, 3.2% sodium citrate. Tubes must be full (see comments below).
Specimen stability: 4 hours at room temperature.

Pediatric Specimen Requirements:

Add blood to the 1.3 mL mark of a Pediatric BLUE top tube, 3.2% sodium citrate.
Specimen stability: 4 hours at room temperature.

Reference Range:

10.3 to 16.6 seconds.

Comments:

Draw volume is critical due to the liquid anticoagulant. Allow tubes to fill by vacuum.

  • Tubes with rubber stopper: fill to line on label.
  • Tubes with plastic (Hemogard) cap: the fill level is above the top of the label.
  • Syringe: do not remove the vacutainer stopper. Insert the needle through the stopper and allow the tube to fill by vacuum. Do not overfill the vacutainer.
  • Pediatric tubes have no vacuum. Remove the cap and add blood to the 1.3 mL mark. Do not overfill.

Synonyms:

Coags
TT