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Children with spastic hip subluxation secondary to cerebral palsy were treated with a standard protocol that focused on early detection of the subluxation using physical examination and anteroposterior pelvis radiographs. Using limited hip abduction of or =25% migration percentage as indications, patients had open adductor and iliopsoas lengthenings with immediate postoperative mobilization and no abduction bracing. The protocol was applied to 74 children with a mean age of 4.5 years and had 147 hips surgically addressed. Of these hips initially, 20% were normal (migration percentage or =60%). At a final postoperative follow-up of 39 months, 54% of these hips were classified as good (migration percentage or =40%). Of this patient population, 69% were nonambulators and their outcomes were not statistically different from children who could walk. No child developed an abduction contracture or wide-based gait that required treatment. With early detection and applying this treatment algorithm, 80% of children with spastic hip disease should have good or fair outcomes. Longer follow-up will be required to determine how many children will need bony reconstruction to maintain stable and located hips at the conclusion of growth.
Miller et al. (1997) studied this question.