Ordering Recommendation

• Assist in diagnosing dysfibrinogenemia or abnormalities with fibrin polymerization.
• Screen samples for the presence of heparin or direct thrombin inhibitors.

Mnemonic
TT
Methodology

Electromagnetic Mechanical Clot Detection

Performed

Sun-Sat

Reported

1-2 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Light Blue (Sodium Citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.

Specimen Preparation

Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)

Storage/Transport Temperature

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Serum. EDTA plasma, clotted or hemolyzed specimens.

Remarks
Stability

Ambient: 4 hours; Refrigerated: Unacceptable; 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

Interpretive Data



No compliance statements are in use for this test.

Note

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

Hotline History
N/A
CPT Codes

85670; if reflexed, add 85670

Components
Component Test Code* Component Chart Name LOINC
0030270 Thrombin Time 3243-3
0030275 Thrombin Time, 1:1 Mix 33525-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Thrombin Clotting Time (TCT)
  • Thrombin Time
  • Thrombin Time, Plasma
  • TT
Thrombin Time with Reflex to Thrombin Time 1:1 Mix