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HelpThrombin Time
eD-H Order Code
LAB324
Specimen Collection Information
| Specimen | Minimum Test Volume | Container | Special Handling |
|---|---|---|---|
| Blood |
PEDI, PICU, or ICN draws refer to specimen collection job aid. All other Coag tubes must be filled to the line on tube. |
Specimen Transport Temperature
Double spin and freeze
Reference Ranges / Critical Values
| Assay | Gender | Age Range | Normal Range | Critical Values | Units |
|---|---|---|---|---|---|
| Thrombin Time | All | 18 Years – 150 Years | 10 -17 | sec |
Specimen Stability
4 hours
Additional Specimen Instructions
1.8 mL Sodium Citrate tube filled to the line
OR
2.7 mL Sodium Citrate tube filled to the line
Blue top tubes must be filled within 10% of stated volume. A discard tube must be used if a citrate tube is to be drawn using a winged blood collection set. It is important to remove air from the blood collection set to ensure the proper blood volume is obtained in the coag tube.
If needed, 1mL sodium citrate tubes can be prepared by the laboratory. These are a non-vacuum orange screw cap tube with lab prepared anticoagulant. To obtain some of these custom tubes please call the coagulation laboratory at 5-9463.
If the patient has a known hematocrit >55%, please contact the coagulation lab for an adjusted collection tube before drawing the blood.
Specimen drawn more than one hour prior to testing may not be reliable for heparin monitoring (may be fasely low) if not spun immediately and seperated from the cells.
Interpretive Data
| Assay Display | Interpretive Data |
|---|---|
| Thrombin Time | A prolongation in the thrombin time (>20 seconds) may be indicative of hypofibrinogenemia or dysfibrinogenemia. The thrombin time will be prolonged often markedly so by the presence of heparin or direct thrombin inhibitors (argatroban bivalirudin dabigatran) in the specimen. |
CPT(s)
85670
Performing Lab Section
Hematology