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Longitudinal study evaluating a seating system using a sacral pad and kneeblock for children with cerebral palsy
Authors:McDonald Rachael L  Surtees Robert
Institution:  a UCL Institute of Child Health, The Wolfson Centre, London, UK
Abstract:Purpose. Adaptive seating systems using sacral pads and kneeblocks are commonly used throughout the UK with children with complex motor disorders to improve their posture and stability in sitting. We sought to evaluate how effective these systems are for a group of children with cerebral palsy.

Method. A six-visit trial was performed to examine whether this combination controls pelvic and hip positioning. Twenty-three children with cerebral palsy aged 7 - 14 years participated (11 females and 12 males). The kneeblocks (active intervention) were removed for a period in the middle of the trial. Force exerted through the kneeblock, pressure exerted on the sacral pad and postural alignment was measured for change.

Results. Statistically significant differences before and after kneeblock removal were found for force at the kneeblock, but no difference was found in pressure at the sacral pad. No statistically significant correlations between force and pressure or posture were found.

Conclusion. The results indicate that seating systems using a sacral pad and kneeblock may not improve overall posture but may improve hip position in children with cerebral palsy.
Keywords:Cerebral palsy  postural management  childhood disability  force  skin interface pressure  wheelchairs
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