99% sensitive in children OVER age 5
Beware of the Tillaux Fracture in adolescents with anteromedial ankle pain, as they would not qualify for imaging according to this rule.
Ottawa knee rules
Ottawa ankle rules
SAD PERSONS score
Arthrocentesis: ankle
Arthrocentesis: elbow
Arthrocentesis: knee
Arthrocentesis: hip
Arthrocentesis: shoulder