ARUP's Laboratory Test Directory

0030260: Thrombin Time with Reflex to Thrombin Time 1:1 Mix

Test Mnemonic: TT
Methodology: Clotting

Performed: Mon-Sat

Reported: 1-2 days

Specimen Required:  
Collect: One 5 mL lt. blue (sodium citrate).  Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for specimen collection instructions.

Transport: 2 mL platelet-poor plasma, frozen. (Min: 1.5 mL) Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 1 mL platelet-poor plasma, frozen.

Remarks: CRITICAL FROZEN. Note on test request form if specimen was drawn in plastic tube. Separate samples must be submitted when multiple tests are ordered.

Unacceptable Conditions: Serum.  Nonfrozen or hemolyzed specimens.

Stability: Ambient: 2 hours; Refrigerated: 4 hours; Frozen: 2 weeks

Reference Interval:
 
Test Number Components Reference Interval
 Thrombin Time 14.7-19.5 seconds
 Thrombin Time 1:1 Mix 14.7-19.5 seconds

Note:
If Thrombin Time is elevated, then Thrombin Time 1:1 mix will be added. Additional charges may apply.

Reference interval for specimens drawn in plastic tubes is 16.5-21.3 seconds.
 

CPT Code(s):
85670 Thrombin time; if reflexed, add 85670 Thrombin time 1:1 mix

 

 

 
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