Compare normal, inflammatory, non inflammatory, and septic conditions of synovial fluid.
- Normal: 1-4 mL, clear to pale yellow, transparent, very high viscosity, few WBCs (mostly monocytes), glucose equal to serum. No crystals or cultures.
- Inflammatory conditions: increase volume, cloudy, yellow/green, opaque, low viscosity, low glucose, 10k-20k WBCs/mm3 (mostly neutrophils), positive in gout and CPPD crystals.
- Non Inflammatory conditions: Like normal conditions with increased volume, straw color, slightly lower viscosity (still high), and 500 WBCs/mm3.
- Septic: Like inflammatory conditions, but positive for cultures, and negative for crystals. Has 50k WBCs/mm3.