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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
Method Name
Compensated Polarized Light Microscopy
Specimen Type
Body FluidSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Body Fluid | Refrigerated (preferred) | |
| Ambient | 24 hours | |
| Frozen | ||
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Clinical Information
Birefringent crystals are found in the synovial fluid of more than 90% of patients with acutely inflamed joints.
Monosodium urate crystals are seen in gouty fluids and calcium pyrophosphate crystals are seen in chondrocalcinosis. The urates are usually needle-shaped, and the calcium crystals are often rhomboidal. Cholesterol crystals may also be observed.
Reference Values
None seen
If present, crystals are identified.
Day(s) Performed
Monday through Sunday
Report Available
1 dayPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
89060