ED Pathway for the Evaluation/Treatment of the Child with Suspected Septic Arthritis

Synovial Fluid Interpretation

Positive WBC > 50, 000 or Gram Stain Positive
  • Treat as Pyogenic Arthritis
Equivocal WBC 25-50,000
  • Consider clinical parameters
  • Lyme
  • Gonorrhea
  • Tuberculosis
  • Alternative diagnoses
Negative WBC< 25,000
  • Toxic Synovitis
  • Alternative diagnoses