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HelpTest Code UFH Unfractionated Heparin Assay
Additional Codes
LAB2396
Performing Laboratory
Central Peninsula Hospital
Collection Instructions
Properly filled 9:1 ratio (blood to anticoagulant); 3.2% NaCitrate tube
Collection Method
Venipuncture
Container
Light Blue Sodium Citrate
Specimen Type
Preferred
- 2.7mL Lt. Blue (3.2% NaCitrate) tube
Acceptable
- 1.8 mL Lt. Blue (3.2% NaCitrate) tube
Minimum Volume
0.5 ml of plasma from a properly filled 1.8 mL or 2.7 mL NaCitrate (light blue) tube
Specimen Stability
| Ambient (15°C to 25°C) | 2 hrs unopened specimen |
| Refrigerated (4°C to 8°C) | N/A |
| Frozen (-70°C) | 6 months for separated plasma |
Reference or Target Ranges
0.3 – 0.7 IU/mL
Reportable Units
IU/mL
Critical Value
>1.10 IU/mL
Reasons for Rejection
| Hemolysis Threshold | If visible – reject |
| Icterus Threshold | If visible – reject |
| Lipemia Threshold | If visible – reject |
| Interfering Subtances/Other | Short draws, over draws, clotted, improperly labeled, hemolyzed, lipemic or icteric samples |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time |
Stat: 1 hour on arrival to lab Routine: 4 hours on arrival to lab |
| Stat Availability | Yes |
| Performing Bench | CPH Coagulation |
| Methodology/Method Description | Stago MAX |
CPT Codes
85520
Last review/edit date
2025