Diseño e implementación de una prótesis del miembro inferior derecho para una persona con amputación transtibial.

Abstract

The objective of this degree work was the design and implementation of a lower right limb prosthesis for a person with transtibial amputation. The design consists of two parts, a mechanism that is made up of the socket, pylon and ankle-foot that provide a safe and cushioned ride to the user; and other electronics in charge of controlling the amount of air that enters the air bladder located between the stump and the socket by means of a pump, a valve, and a pressure sensor. The Arduino card processed the data originated from the pressure sensor to activate the pump and valve according to the assigned condition. The design and simulation of the ankle-foot was carried out in the Autodesk Inventor program, from which an .stl file is generated, necessary to configure the printing parameters in the Cura program and transform them into G code, which is the language that the 3D printer understands. As a result of the tests, it was determined that the pressure in the air bladder for a good fit with the stump is around 30kPa and the load that must be applied to the ankle-foot must be less than 735 N. It is concluded that when applying a load greater than the established, the prototype has cracks that can be corrected with springs; and the suspension by means of the air bladder must be made of a more comfortable material for the user. It is recommended not to rely solely on the simulation results for the final design.