Biomechanics and patient preferences in prosthetic feet
Prosthetic feet are available in many varieties and can be of influence to the individual’s walking ability and pattern. Choice of foot can be influenced by many factors, including:
- Guidelines from payer;
- User preference;
- Prosthetist judgment;
- Physician prescription.
For this study feet were categorised:
Stiff: ≥ 25 mm displacement and ≤ 75% energy loss;
Compliant: ≥ 25 mm displacement and ≥ 75% energy loss;
Intermediate: < 25 mm displacement.Patients were allowed to test feet in such a way they could not see the foot that was being tested and movments were monitored.
Most patients self selected the compliant feet, reporting more functional gait. Even though, in the lab setting, there was very little difference in the movements for the intermediate feet. However, the compliant foot did show overall lower sagittal moments compared to other categories. This implies that the amputee can defect biomechanical characteristics of the foot. Sadly, the use of these feet had no overall impact on the participant’s activity levels.
> From: Raschke et al., J Biomech 48 (2015) 146-152. All rights reserved to The Author(s). Click here for the Pubmed summary.