Objective: To evaluate whether medial knee support (MKS) in seating systems aggravates hip displacement in children with cerebral palsy (CP).
Design: Retrospective chart review.
Setting: Rehabilitation department of tertiary university hospital.
Participants: Children with CP (N=76) using seating systems (intervention group, n=42; mean age 6.86y) and using regular wheelchairs (control group, n=34; mean age 8.15y).
Interventions: The intervention group was provided with a seating system with MKS. We enrolled children who did not use a seating system in the control group, retrospectively.
Main outcome measures: By radiographic images, Reimer's migration index (MI), lateral center edge angle (CEA), and femur neck shaft angle (NSA) were measured. We compared the demographic data, clinical variables, and radiographs between the 2 groups.
Results: In the intervention group, there was a significant deterioration in the MI, from 26.89% to 44.18% after using the system (P<.001). The progression of MI was 14.72% and 7.82% per year in the intervention and control groups, respectively (P=.016).
Conclusion: We should consider the possibility that seating systems with MKS may exacerbate hip displacement in children with CP.
Keywords: Cerebral palsy; Hip dislocation; Rehabilitation; Technology; Wheelchair.
Copyright © 2018 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.