Home
HelpTest Code UFH Unfractionated Heparin Assay
Additional Codes
LAB2396
Special Collection Instructions
Properly filled 9:1 ratio (blood to anticoagulant); 3.2% NaCitrate tube
Collection Method
Venous Draw; properly filled 9:1 ratio (blood to anticoagulant)
Minimum Volume
0.5 ml of plasma from a properly filled 1.8 mL or 2.7 mL NaCitrate (light blue) tube
Container
Light Blue Sodium Citrate
Preferred Specimen
2.7mL Lt. Blue (3.2% NaCitrate)
Acceptable Specimens
1.8 mL Lt. Blue (3.2% NaCitrate) tube
Reference or Target Ranges
UFH: 0.3 – 0.7 IU/mL
Reportable Units
IU/mL
Critical Value
UFH: >1.0 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, samples > 4 hours from collection |
Specimen Stability
| Ambient | 2 hrs unopened specimen |
| Refrigerated (4°C to 8°C) | N/A |
| Frozen(-70°C) | 6 months for separated plasma |
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 | Coagulation |
| Methodology/Method Description | UH: Stago MAX |
CPT Codes
85520
Last review/edit date
NOV 2024