Prototipo de plantilla instrumentada para la determinación de la presión plantar orientada a la prevención de úlceras de pie diabético

Abstract

This research study focuses on design and construction of an instrumented insoles prototype for acquisition of plantar pressure data. The main objective was implementing an instrumented insole prototype to determine plantar pressure aimed to diabetic foot ulcers prevention, in order to provide a medical diagnosis support tool. that provides accurate information about pressure distributions on foot. During system development a detailed literature review was carried out, focused on foot biomechanics study, the human gait phases, and pressure as triggering factor of ulcers in patients with at risk foot. For prototype construction, size 40 insoles were used, which fit a significant segment of the target population, each with seven pressure sensors distributed over different interest areas. The sensors incorporated were Flexiforce A401 and FSR model 402. System has WiFi communication and uses MQTT protocol for data publish on cloud server. A TinyS3 was used as data acquisition and processing board, visualization was done in a user interface designed in Node-RED. Prototype functional and validation tests were carried out and a reliability level of 93.32% was obtained. Through testing carried out on healthy people and diabetic patients, it was possible to conclude that this system can be useful in clinical diagnosis to early identify abnormal pressures and prevent foot ulcers development.