Subtrochanteric valgus osteotomy for chronically dislocated, painful spastic hips. Surgical technique

Area of Science:

• Pediatric Orthopedics
• Neuromuscular Disorders
• Surgical Outcomes

Background:

• Chronic hip dislocation in children with spasticity presents significant challenges for mobility and care.
• Existing treatments for painful, dislocated hips in non-ambulatory children are limited.
• The valgus subtrochanteric femoral osteotomy, originally for adults, has been adapted for pediatric use.

Purpose of the Study:

• To evaluate the outcomes of a modified Hass subtrochanteric valgus osteotomy.
• To assess the effectiveness of this procedure in treating symptomatic chronic hip dislocations in pediatric patients with spasticity.
• To analyze pain relief, functional improvement, and caregiver satisfaction post-surgery.

Main Methods:

• Retrospective review of 31 modified Hass osteotomies in 24 pediatric patients (1995-2005).
• Analysis of surgical indications, complications, and radiographic outcomes.
• Caregiver surveys assessing pre- and post-operative pain, sitting tolerance, transfers, and diapering ease.

Main Results:

• Fifteen patients (63%) experienced complications, including infection, pneumonia, hardware issues, and heterotopic ossification.
• Despite complications, the majority showed improvement at an average 44-month follow-up.
• Caregivers reported improved sitting duration, easier transfers, and simpler diaper changes, with 14/15 satisfied with results.

Conclusions:

• The modified Hass osteotomy offers reproducible pain relief and improved positioning for children with hip dislocations due to neuromuscular disorders.
• The complication rate is comparable to similar procedures in this high-risk population.
• Femoral head resection was not required concurrently with the osteotomy in this patient cohort.