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[Purpose] To measure the load applied to wheelchairs due to spasticity, and the establishment of a methodology for revealing the load. [Subjects and Methods] The position of a strain gage for measuring the load applied to a wheelchair was determined in a structural analysis simulation, and the actual load on the head support imparted by a spastic-type cerebral palsy patient was measured. [Results] The maximum load applied to the head support of the wheelchair due to spasticity was 346 N (load – weight ratio 88.3%). In addition, it was revealed that the head support experienced both extension and flexion strains. [Conclusion] The load applied to the head support of the wheelchair was quantified using strain gages. It was revealed that 88.3% body weight is applied to the head support of the wheelchair due to spasticity. These results are potentially important data for new standards of wheelchair strength.

Overload on Wheelchairs Due to Spasticity: Measurement of Forces Acting on the Head Support