Lupus Inhibitor Assay (by Hexagonal APTT method)
General Information
Lab Name
Lupus Inhibitor Assay
Lab Code
LUPINH
Epic Name
LUPUS INHIBITOR ASSAY
Description
Patients on hirudin (Refludan), bivalidrudin (Angiomax), Dabigatran (Pradaxa), and argatroban (Novastan) may show interference due to the direct thrombin inhibition. This may cause a false positive or falsely increased positive result.
Synonyms
LAC, Lupus Anticoagulant Assay
Interpretation
Method
Clot based using hexagonal phase phospholipid
Reference Range
| Female | Male | ||
|---|---|---|---|
| Age | Range | Age | Range |
| 0- | Negative [NRN] | 0- | Negative [NRN] |
Effective date: 04/01/2010
Ordering & Collection
Specimen Type
Collection
3 or 5 mL BLUE (CITRATE) tube
Handling Instructions
The Laboratory MUST process specimen, within 4 hrs of blood collection.
Quantity
requested: entire sample
Processing
UW-MT Instructions: Take specimen to UW Coag for processing. Coag tech will freeze plasma sample for transport to HMC Coag."
HMC Instructions: Take specimen to Coag
Outside Laboratory: Centrifuge for 10 minutes, remove plasma & re-spin plasma for another 10 minutes. Decant & Freeze plasma (minimum 1.0 mL) @ -50°C to -70°C. Send Frozen on dry ice.
Performance
LIS Dept Code
Coagulation (COAG)
Performing Location(s)
Frequency
Monday, Thursday
Available STAT?
No