- Synovium is susceptible to bacterial seeding
- Kochers predictors : Refusal to bear weight, Temperature >38.5°C, White blood cell count >12,000 cells/mm3, Erythrocyte sedimentation rate >40 mm/hr, C-reactive protein (CRP) levels >2.0 mg/dL (>20 mg/L)
- Ultrasound is useful for demonstrating effusion as well as for guiding aspiration
- MRI is indicated if ultrasound or aspiration is negative
- Antibiotics should not be unduly withheld if clinically indicated
- Large joints: Irrigation and drainage/debridement
- Possible sequelae : Chondrolysis, Avascular necrosis, Growth disturbance of the femur or acetabulum, Subluxation
