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Test Code LAB1208 Thrombin Time

Aliases

TT

Special Collection Notes

It is not recommended to draw specimen from a heparinized line. If drawing from line refer to proper procedure, generally flush line with 5mL saline and discard first 5mL ofblood. (Results may be falsely increased)
Tubes must be filled to the marked line for accurate testing.

Specimen Type

Blood:
LT Blue Top Tube-Citrate

Processing Instructions

After collection, invert tubes 3-a4 times. Do not shake. Centrifuge within 30 minute sof collection.

1. Centrifuge sample per procedure.
2. Pipette off plasma into pour off tube.
3. Centrifuge spun plasma per procedure.
4. Pipette off plasma into pour off tube, being sure to leave red cell button undisturbed.
5. Attach original sample tube to pour off tube with rubber band.
6. Place sample in freezer until courier arrives.
7. Send sample frozen on dry ice via courier.

Specimen Volume

Preferred: 2.7 or 1.8 mL
Minimum: 1.8 mL

Temperature

Frozen

Test/Batch Schedule

Batched schedule

TAT

Routine: 4 hours
STAT: 60 minutes

Test Components

TT

Reference Range

0-3 months: 15.4-22.0 seconds

3 months and up: 14.0-20.0 seconds

CPT

85670

Performing Section

Hematology/Coag