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Test Code DSDNWR Double Stranded DNA (dsDNA) Antibody IgG by Multiplex Flow Immunoassay (MFI) with reflex to IFA using Crithidia

Important Note

Useful for: Screening and diagnosis of patients with clinical features or at-risk for systemic lupus erythematosus.  Patients with equivocal or positive results will reflex to indirect immunofluornscence (IFA) using Crithidia luciliae.  

Additional Codes

Epic EAP
LAB5257 dsDNA AB with Reflex IgG 

Specimen Requirements

Preferred Collection Container: 

SST (Serum Separator)

 

Also Acceptable Collection Container: 

Red (No Additive)

 

Collection Information: 

Collect blood in a serum separator or red top tube.

 

Transport Information: 

Centrifuge and aliquot 0.25 mL into a plastic transport vial. Send refrigerated. 

 

Minimum Sample Volume: 

0.15 mL of serum (approximately 0.3 mL of whole blood based upon a normal patient hematocrit).

 

Unacceptable Conditions: 

Hemolysis

Performing Laboratory

Pathology Laboratory, UnityPoint Health, Des Moines

CPT

86225

(If reflex negative, add 86255, if reflex positive, add 86256)

Methodology

Multiplex Flow Immunoassay (MFI)
Indirect immunofluorescence (IFA) using Crithidia luciliae

Stability

Refrigerated Stability: 

7 days - Preferred

 

Frozen Stability: 

30 days

 

Ambient Stability: 

4 hours

Performance

Performed: 

MFI: Monday - Friday
IFA: Monday and Thursday

 

Analytical Time: 

4 hours

Alias

dsDNA Ab with Reflex IgG