This tool supports structured infectious-disease decision making but does not replace clinician judgement or local guideline pathways.
This OpiCalc infectious-disease entry reflects commonly used guideline criteria and bedside risk features used in contemporary clinical practice.
Kocher Criteria: Classic pediatric septic arthritis probability tool based on fever, ESR, weight-bearing, and WBC.
Fever >38.5°C
+1 Points
Non-weight-bearing
ESR >40 mm/h or CRP elevated
WBC >12,000/µL
CRP >2 mg/dL
Assessment Tier
Score 0
Selected findings do not strongly support septic arthritis.