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THROMBIN TIME
Number 1244
CPT Code 85670
Alias TCT
Specimen Container Blue Top Citrate
Specimen Type Plasma Citrate
Turn Around Time
Days Performed
Reference Range Contact Laboratory
Alternate Specimen
Volume 2 mL Plasma
Stability Ambient N/A
Stability Refrigerated N/A
Stability Frozen Preferred
Patient Preparation
Ideally the patient should not be on anticoagulant therapy. Avoid warfarin (Coumadin®) therapy for two weeks prior to the test and heparin, direct Xa, and thrombin inhibitor therapies for about three days prior to testing. Do not draw from an arm with a heparin lock or heparinized catheter.
Methodology
Human thrombin is mixed with the patient sample and clotting time is determined photometrically.
Limitations
Rejection Criteria
Severe hemolysis; improper labeling; clotted specimen; specimen diluted with IV fluids; samples thawed in transit; improper sample type; sample out of stability
Additional Instructions
Performing Laboratory Reference Laboratory
TagsTHROMBIN, CLOTTING, TIME