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HelpTest Code Heparin Anti-Xa HEPARIN ANTI-Xa
Aliasis
Unfractionated Heparin Assay (UNF)
Patient Preparation
No special patient preparation required
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 of plasma from a properly filled 1.8 mL or 2.7 mL NaCitrate (light blue) tube
Container
Light Blue Sodium Citrate tube
Preferred Specimen
2.7 mL Lt Blue (3.2% NaCitrate) tube
Acceptable Specimen(s)
1.8 mL Lt Blue (3.2% NaCitrate) tube
Reference or Target Ranges
|
Unfractionated Heparin Therapeutic Range: |
0.3-0.7 IU/mL |
|
LMWH Therapeutic Range (target levels measured 4-hrs after dosing): |
Lovenox (Enoxaparin) bid dosing: 0.6-1.0 IU/mL
qD dosing: > 1.0 IU/mL |
Reportable Units
IU/mL
Critical Value
Not defined for this assay
Reasons for Rejection
|
Hemolysis Threshold: |
347 mg/dL |
|
Icterus Threshold: |
60 mg/dL |
|
Lipemia Threshold: |
807 mg/dL |
|
Other: |
Short draws, Over draws, Clotted, Improperly labeled, > 1 hour from collection |
Specimen Stability
Plasma:
|
Ambient: |
2 Hours |
|
Frozen: |
15 Days |
Performance Information
|
Days and Time Performed |
24/7 |
|
Expected Turn Around Time |
Stat: 1 Hour, Routine: 4 Hours |
|
Stat Availability |
Yes |
|
Performing Bench |
CRMC Coag |
|
Methodology/Method Description |
CS - 2500 |
Methodology/Method Description
CS-2500: A one stage chromogenic assay
CPT Codes
85520