Is the question whether you can use it with a child with hip dislocation (yes, restrictions are usually minimal), or whether this will assist in re-locating a dislocated hip (unlikely as the position used to deepen the acetabulum is abduction- double diapering in very young, or bracing in older kids).
Question from a PTA who has a child with hip dislocation: Is there any clinic that you are aware of that has used the lite gait with a client with a hip dislocation successfully?
