Thrombin Time TT

Method(s) Clot Detection
Specimen Required
Collect

One adequately filled 3.0 mL light blue (sodium citrate) top tube.

Transport

**TIME SENSITIVE** For specimens that cannot be shipped to the laboratory to arrive within 4 hours of collection, see Collection and Processing of Coagulation Specimens information (link below).

Remarks

Draw blood into the citrate (light blue cap) filled to the proper level (1 part anticoagulant to 9 parts blood). Invert tube 3-4 times to avoid clotting.

Stability Ambient and Refrigerated Plasma: 4 hours; Frozen Plasma: 2 weeks
Unacceptable Conditions

Specimens that are clotted, collected in the incorrect specimen tube, less than 90% filled, exceed stability limits or hemolyzed are not acceptable for testing.

Schedule Daily
Billing Code 4010054
CPTCode 85670
Preferred Specimen Collection Device(s)
Reference Interval

16.0-22.0 seconds

No Appointment Necessary
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12 Patient Service Centers in Central New York.

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