Hip dislocation is one of the most common and serious orthopedic complications in cerebral palsy, especially for non-walking children. This article explains why hip surveillance matters, when reconstruction is recommended, what surgery involves, recovery, and long-term outcomes.
Why CP Hips Are at Risk
The hip joint is shaped by the constant balanced pull of muscles around it. In CP, spasticity around the hip produces unbalanced forces. The femoral head (ball of the thigh bone) is gradually pulled out of the acetabulum (socket of the pelvis). This is called subluxation when partial, dislocation when complete. Without intervention, dislocated hips often become painful, limit seating tolerance, and cause progressive pelvic deformity. Children at GMFCS IV and V have the highest risk; GMFCS I and II children rarely need hip surgery.
Hip Surveillance: What It Is and Why It Matters
Hip surveillance is a structured program of regular hip X-rays to track the migration percentage (MP) of each hip. Programs vary by region but typically follow Australian or American guidelines: X-rays starting around age 1 to 2, every 6 to 24 months depending on GMFCS level and prior findings. Migration percentage above 33 percent is concerning; above 50 percent often triggers surgical evaluation. Early detection allows simpler procedures (soft-tissue release, single bone correction) instead of complex reconstruction.
Major orthopedic surgery and lifelong hip surveillance are expensive. A free legal review can clarify whether the underlying CP was preventable and what funding options exist.
When Surgery Is Recommended
Reconstruction is typically recommended when:
- Migration percentage exceeds 50 to 60 percent
- Symptoms develop (pain, range-of-motion loss, seating difficulty)
- X-rays show progressive deformity despite conservative care
- The child is at an age where reconstruction will provide long-term benefit
Decision is made jointly between the orthopedic surgeon, pediatric physiatrist, and family. Conservative options (Botox, bracing) may be tried first if migration is mild and slowly progressing.
What Surgery Involves
Hip reconstruction is typically a multi-component procedure addressing the bony anatomy and surrounding soft tissue:
- Femoral osteotomy: surgeon cuts and reshapes the femur (varus derotational osteotomy) to redirect the femoral head into the socket.
- Pelvic osteotomy: surgeon reshapes the acetabulum (Dega, Pemberton, San Diego, or shelf procedure) to provide adequate coverage.
- Soft-tissue releases: release of tight hip adductors, hip flexors, or hamstrings to rebalance forces.
- Hardware (plates, screws) holds the bony corrections in place during healing.
Surgery typically takes 3 to 6 hours under general anesthesia. Hospital stay is 4 to 7 days, with pain management via regional blocks and scheduled medications.
Recovery and Pain Management
Post-operative phases:
- Weeks 0-2: hospital then home with pain management. Hip abduction brace or pillow to maintain position. Family training on transfers and positioning.
- Weeks 2-6: continued bracing, gradual increase in tolerated positions. PT begins gentle range of motion.
- Weeks 6-12: weight-bearing trials per surgeon protocol, transition out of bracing, intensification of PT.
- Months 3-12: progressive PT to retrain movement patterns, strengthen, and rebuild seating tolerance.
Pain is significant for the first 2 to 3 weeks. Multimodal pain management (regional blocks, scheduled acetaminophen and ibuprofen, opioids as needed, muscle relaxants) is important. Most children sleep poorly for the first 1 to 2 weeks; family rest and respite matter as much as the child’s comfort.
Long-Term Outcomes
For most children, hip reconstruction provides lasting benefits: pain prevention or relief, restored ability to sit comfortably for hours at a time, slowed progression of pelvic obliquity, and improved quality of life for both the child and the family. Some children may need future revision surgery during growth spurts or adolescence. Continued spasticity management (Botox, possibly ITB or SDR) protects the surgical result. Hip surveillance continues lifelong even after reconstruction.
Hip Surveillance and Surgery Roadmap
Use this list to discuss hip care with your team.
Will my child walk again after hip reconstruction?
Walking children usually return to walking, sometimes with new bracing. Non-walking children do not gain walking from hip reconstruction. The primary goals for non-walking children are comfort, seating tolerance, and prevention of future pain. Setting realistic goals before surgery is essential.
How painful is the recovery?
The first 2 to 3 weeks involve significant pain that requires scheduled medication. Most children sleep poorly during this time. By week 4 to 6, comfort improves substantially. Multimodal pain management and family support during this window are critical.
We help families across 38 states identify CP-specialty orthopedic centers.
Related reading for parents
- Hip surveillance for children with CP: why it matters and what to expect
- Hip dysplasia and cerebral palsy: what every CP parent needs to know
- Tendon and muscle lengthening surgery in cerebral palsy: when, why, and recovery
- Intrathecal baclofen pump for severe spasticity: a parent’s complete guide
- Spasticity in cerebral palsy: causes, effects, and treatment
Our team helps families in 38 states understand the full clinical picture and what services should be in place. No cost. Answers first.
