Cell Count, Body Fluid
Evaluate synovial fluid for the presence of RBCs, WBCs, crystals, and for physical appearance
Green-top (heparin) tube (preferred) or lavender-top (EDTA) tube. The lavender-top (EDTA) tube is not preferred for crystal exam.
Transport to the laboratory as soon as possible.
Room temperature Unstable
Refrigerated 2 days (48 hours)
Freeze/thaw cycles Unstable
Quantity not sufficient for analysis; improper labeling; specimen frozen; specimen more than 48 hours old; gel-barrier tube