In wheelchair cushions, shear forces occurring on the seat surface have gained attention from the perspective of pressure ulcer prevention. However, there is no standardized test method for cushion characteristics related to these forces. Meanwhile, a test method should ideally be highly feasible and low-cost. Therefore, we conceived and trialed an easily implementable test method using a wheelchair test dummy with its lower legs and feet removed, and identified potential issues through this trial. Results showed that the dummy may tilt when the torso is present, the size of sensors could potentially affect measurements for air cell type cushions as they may sink between cells, and the evaluation of shear force characteristics requires careful consideration of temporal changes. These findings provided valuable insights for the future development of measurement techniques.

  As highlighted in the special feature ”Electric Wheelchairs Expanding Possibilities” in the 2023 issue of this journal, there is a growing advocacy for developmentally oriented support for self-mobility in children who experience difficulties moving independently. To facilitate the widespread adoption of electric wheelchairs, it is essential to establish relevant legislation and verify implementation through the accumulation of case studies. This study aimed to objectively visualize the process by which a child with Fukuyama congenital muscular dystrophy became proficient at using a powered mobility device. After approximately 13 months of use, the child demonstrated the ability to operate the device and move independently. The observed changes in cognitive and communicative aspects during this acquisition process reflect broader human developmental milestones, revealing impacts that extend beyond mere mobility.