A Method to Measure the Accuracy of Loads in Knee-Ankle-Foot Orthoses Using Conventional Gait Analysis, Applied to Persons With Poliomyelitis

Loads on the uprights of a knee-ankle-foot orthosis

“…When normalized to body weight, peak forces and moments agree with previous work. 1,21 The absolute extrema of the 95% prediction intervals at full extension from this study match reasonably well with the values reported by Andrysek, the work most similar to the current study. 1…”

“…3 Because there is a lack of objective design standards for orthotics, it has been questioned whether braces are optimally designed for the loads a user will impart and how to obtain these target loads. 1,11,19 Over-designed components add unnecessary bulkiness to a KAFO. Manufacturers perform mechanical testing on components to ensure they meet design-load safety-testing specifications.…”

“…1,6,8 Recently, a study used a load sensor at the KAFO joint to directly measure the loads on the joint, and reiterated the importance of additional work to guide orthotic component design. 1…”

“…13,15,20 Since then, many authors have discussed how this work is necessary and should be expanded, but few recommendations have resulted. 1,6,8 Recently, a study used a load sensor at the KAFO joint to directly measure the loads on the joint, and reiterated the importance of additional work to guide orthotic component design. 1 Until this lack of knowledge is addressed, orthotic design will continue to be based on conjecture rather than on sound engineering.…”

“…1,6,8 Recently, a study used a load sensor at the KAFO joint to directly measure the loads on the joint, and reiterated the importance of additional work to guide orthotic component design. 1 Until this lack of knowledge is addressed, orthotic design will continue to be based on conjecture rather than on sound engineering. As additional objective data are provided, manufacturers and practitioners can better serve patients with a device that will enhance function and lifestyle while minimizing device abandonment.…”