A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
LUPUS ANTICOAGULANT REFLEXIVE PANEL
Test CodeLUPS1
CPT Codes
85610; 85730; 85520; 85670, if reflexed 85384; If results for all 4 tests above are normal, then: 85613 (up to x3); 85730 (up to x3)
Includes
Panel components: PT, PTT, Thrombin Time, Anti-Xa, Fibrinogen (if indicated), dRVVT and Silica Clotting Time Screen (SCT), dRVVT and SCT confirmation (if indicated), dRVVT and SCT mixing studies (if indicated) and Pathologist interpretation.
Preferred Specimen
2 Blue tubes (Sodium Citrate)
Minimum Volume
1 mL
Other Acceptable Specimens
None
Instructions
Tube MUST be full for proper whole blood to anticoagulant ratio. Invert tube "end-to-end" to prevent clotting. Centrifuge to obtain platelet-poor plasma. See Additional Information below for obtaining a platelet-poor sample.
Transport Container
Stanfard transfer tube
Transport Temperature
Frozen
Specimen Stability
Frozen at -20°C or lower up to 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
The following conditions will be rejected:
- Refrigerated plasma samples that are >4 hours from collection
- Clotted samples
- Grossly hemolyzed samples
Methodology
Clot Detection
Setup Schedule
M, W, F only
Report Available
Within 24 hours of day tested at the performing laboratory.
Reference Range
Component | Reference Range |
---|---|
PT | 10.1 - 13.1 sec |
PTT | 25.0 - 36.0 sec |
Thrombin Time | 10.3 - 16.6 sec |
Anti-Xa | Not Present |
Fibrinogen (if indicated) | 163 - 463 mg/dL |
dRVVT Screen Ratio | <1.20 |
Silica Clotting Time Screen Ratio (SCT) | <1.22 |
dRVVT Confirmation Total Ratio (if indicated) | <1.20 |
Silica Clotting Time Confirmation (SCT) Total Ratio (if indicated) | <1.22 |
dRVVT Screen Mixing Study Ratio (if indicated) | <1.20 |
Silica Clotting Time Confirmation (SCT) Screen Mixing Study Ratio (if indicated) | <1.22 |
Clinical Significance
Use for unexplained prolonged PTT or for patients with a significant probability of having antiphospholipid syndrome (APS).
Performed By
Alverno Laboratories
Performing Laboratory
Alverno Central Lab
NHMC (Hematology, IL Coag)
Additional Information
Obtaining A Platelet-Poor Specimen
Last Updated: June 9, 2023