Design and Comparative Analysis of a Modular Orthosis for Pediatric Lower Limb Rehabilitation

Valer L.; Muñoz J.; Silva Y.; Apaza J.; Luque C.; Diaz C. · SSRG International Journal of Mechanical Engineering (2025) · DOI: 10.14445/23488360/ijme-v12i11p104

Resumen

This paper addresses the design of pediatric orthoses for children with cerebral palsy, considering that most current solutions are adaptations of adult models that do not address the anatomical and biomechanical particularities of children. A modular knee orthosis is proposed, ergonomic, lightweight, and primarily active, manufacturable through additive manufacturing, aimed at children aged 4 to 11 years. The design includes the option of integrating a proportional control system to assist or limit flexion-extension movement, adaptable to sensor signals based on the user's gait pattern. The CAD model was validated through structural analysis simulations, which recorded a maximum stress of 452.3 MPa and a safety factor of 15, indicating that the structure could withstand a stress of up to 6,784 MPa without compromising its integrity. Displacement was practically zero, demonstrating high rigidity and stability. The control system exhibited stable behavior, with minimal oscillations, ensuring smooth and comfortable movements. The results confirm that the proposed orthosis is safe, functionally stable, and economically viable, with the potential to improve quality of life and enhance pediatric rehabilitation.

Instituciones: Universidad Nacional de San Agustín de Arequipa