Analysis of Force Distribution on Upper Body Limbs during Ambulation with Crutches

Crutches provide support for various mobility impairments as well as aid during recovery of lower limbs. Resultant forces on upper limbs can cause pain and conditions such as carpal tunnel syndrome. This study aims to develop a system to accurately measure forces present on the interaction points between the upper limb and crutch, to determine if there are differences between crutch manufacturing options (spring dampening component), as well as between the environments in which crutches are used, such as up and down hills or on a rocky surfaces. Overall, it was seen that the forces at the interface are highest over the carpal tunnel region. The spring was shown to reduce the maximum rate of loading. The largest environmental effect was seen by the rocks, which increased the maximum rate of loading. Gait over rocks was also seen to increase the maximum forces seen at the interfaces, though not significantly.M.H.Sc