Biomechanical and Kinematic Gait Analysis in Lower Limb Amputees: Cross-Sectional Study.

Abstract

Background: The quantification of gait parameters in amputees facilitates the assessment of their performance with prosthetic devices. These parameters often depend on measurements based on anatomical aspects that vary across different types of lower limb amputations.

Objective: This study aimed to investigate body weight distribution, and gait symmetry, quality, and propulsion, as well as pelvic kinematics in the amputee population.

Methods: The EcoWalk baropodometry platform was used to measure plantar pressure, and the G-Walk inertial sensor was used for accelerometry measurements in 29 unilateral lower limb amputees.

Results: Values were estimated for each variable under analysis, and the findings were categorized by the level of amputation. All variables exhibited normal distribution within each group under analysis , except for the symmetry index in above-knee (AK) amputees (P=.03). Regarding the body weight distribution (P=.11), velocity (P≥.99), propulsion (P=.38), and quality index (P=.10) of the amputated limb; no significant differences were observed between the AK and below-knee (BK) amputees. The most significant deviation was noted in pelvic obliquity, which was greater in AK amputees compared to BK amputees.

Conclusions: The values reported for the variables under analysis may enable the establishment of more precise reference levels for the amputee population, thereby contributing to a more accurate diagnostic process and aiding prosthetic fitting.