Order Code ALDEF Alpha Defensin, Lateral Flow Assay, Synovial Fluid
Ordering Guidance
This test should only be used for patients with a total joint prosthesis.
Necessary Information
Specimen source and type of joint are required. If not obtained from a prosthetic joint, testing will be canceled.
If ordering electronically, answers must be provided for the order entry questions.
If not ordering electronically, specimen source and type of joint must be provided on the request form.
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Plain red-top tube
Submission Container/Tube: Plastic vial
Specimen Volume: 0.6 mL
Useful For
Detection of alpha defensins 1-3, human host response proteins, in synovial fluid of adults with a total joint replacement who are being evaluated for revision surgery
This test is not intended to be used to determine timing for reimplantation in 2-stage procedures.
Method Name
Lateral Flow Assay (LFA)
Reporting Name
Alpha Defensin, Synovial Fluid, LFASpecimen Type
Synovial FluidSpecimen Minimum Volume
0.10 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Synovial Fluid | Refrigerated | 7 days |
Reject Due To
Gross hemolysis | Reject |
Reference Values
Negative
Reference values apply to all ages.
Method Description
The Alpha Defensin Lateral Flow Test Kit is an immunoassay test system comprised of a single use device, a premeasured vial of dilution buffer, a disposable Microsafe tube, and a sample cup.
Each device contains a reagent strip with all the critical components for the assay. Dilution is performed by collecting a sample from an aspirated synovial fluid specimen using the disposable Microsafe tube and adding the sample to the premeasured dilution buffer. Three full, free-falling drops of the diluted sample are then added to the test device to begin the testing process. Cellular material is removed by the first pad. The solution then migrates to the buffering pad and mixes with the gold conjugate that has been labelled with an anti-alpha defensin antibody. The test mixture then migrates across the test line and the control line. A test result line will form if the level of alpha defensin in the sample is greater than the cut-off concentration. A control line will form to confirm that the solution has properly flowed across the device. Results can be read between 10 to 20 minutes.(Package insert: Synovasure Alpha Defensin Lateral Flow Test Kit. Zimmer Biomet; M40004 V 8, 01/2024)
Day(s) Performed
Monday through Friday, Sunday
Performing Laboratory
Mayo Clinic Laboratories in RochesterCPT Code Information
83518