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HelpHeparin (unfractionated) Level
eD-H Order Code
LAB2003
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, separate, and freeze
Reference Ranges / Critical Values
| Assay | Gender | Age Range | Normal Range | Critical Values | Units |
|---|---|---|---|---|---|
| UF Heparin | All | 0 Minutes – 150 Years | >0.99 | IU/mL |
Specimen Stability
4 hours
Additional Specimen Instructions
1.8mL 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 |
|---|---|
| UF Heparin |
Heparin (anti-Xa) levels should be determined in a plasma sample that has been drawn 6 hours after a dose change to approximate steady-state for continuous heparin infusions. Indication specific Heparin (anti-Xa) levels based on order set selection: Acute DVT or PE treatment: 0.3 – 0.7 IU/mL Thrombosis Prevention (eg. atrial fibrillation, peri-procedural bridging, mechanical valves): 0.3 – 0.7 IU/mL Acute Coronary Syndrome: 0.3 – 0.7 IU/mL Stroke Indications: 0.3 – 0.5 IU/mL Ultra-low intensity (select indications in cardiac surgery): 0.1 – 0.3 IU/mL |
CPT(s)
85520
Performing Lab Section
Hematology