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HelpTest Code CRSBF Crystal Identification, Body Fluid
Specimen Required
Specimen Required
Specimen Type: Synovial Fluid, Prosthetic Joint Fluid
Container/Tube: Lavender top (EDTA)
Acceptable: Green top (heparin)
Specimen Volume: 2 mL
Specimen Type: Bile Fluid
Container/Tube: Red top
Specimen Volume: 2 mL
Specimen Type: Bronchoalveolar Lavage (BAL)
Container/Tube: Body fluid container
Specimen Volume: 2 mL
Specimen Type: Pleural Fluid, Peritoneal Fluid, Pericardial fluid
Container/Tube:
Preferred: Body fluid container
Acceptable: Lavender top (EDTA) or Green top (heparin)
Specimen Volume: 2 mL
Useful For
Identifying the presence and type of crystals in body fluid
Method Name
Compensated Polarized Light Microscopy
Reporting Name
Crystal ID, BFSpecimen Type
Body FluidSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Body Fluid | Refrigerated (preferred) | ||
| Ambient | 24 hours | ||
| Frozen | |||
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
None seen
If present, crystals are identified.
Interpretation
Positive identification of crystals provides a definitive diagnosis for joint disease.
Day(s) Performed
Monday through Sunday
Report Available
1 dayPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
89060
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CRSBF | Crystal ID, BF | 6825-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CRYFT | Fluid Type | 14725-6 |
| CRYID | Crystal ID | 6825-4 |
| CRYCM | Comment | 77202-0 |