Provider performed microscopy- polarizing microscope
Performed by authorized providers in the point of care. Synovial fluid crystal analysis is used to investigate joint inflammation. Needle-like monosodium urate crystals (MSUM) are associated with gout, and calcium pyrophosphate dihydrate (CPPD) crystals are associated with calcium pyrophosphate dihydrate deposition diseases, including pseudo gout, chondrocalcinosis , and pyrophosphate arthropathy.
No crystals seen
Polarizing artifacts that may be seen with polarized microscope examination; glass fragments, collagen fibrils, dust particles, corticosteroids, fibrils from lens paper, cartilage fragments, lipids from degenerated cells, metal fragments from prosthesis, threads, scratches in glass slide.
Collect in syringe containing sodium heparin. If the sample is transferred to a collection tube, the preferred tube should contain sodium heparin or EDTA. Urine cups and other containers are acceptable.
For more test specific information, please refer to the test procedure found on the Michigan Medicine POC website: https://www.pathology.med.umich.edu/point-of-care