DDH Closed reduction, Arthrogram and Spica Application

Courtesy: Taral Nagda, Paediatric Orthopaedic Surgeon, Mumbai

Ramsey’s safe zone: described as the arc of motion through which the hip remains reduced without forced abduction

1. Minimal Abduction: Zone of Redislocation
2. Safe Zone
3. Maximum Abduction: Zone of Ischemia

Ramsey PL, Lasser S, MacEwen GD.
Congenital dislocation of the hip. Use of the Pavlik harness in the child during the first six months of life.
J Bone Joint Surg Am. 1976 Oct;58(7):1000-4.