Desarrollo de una prótesis mioeléctrica de brazo de bajo costo, para un niño de un año de edad con el defecto congénito de brida amniótica.

Abstract

Through this reseach a low-coast arm myoelectric prosthesis was developed for a one-year-old child who presented a congenital defect of amniotic in his left arm, using the inductive method it was known that the patient’s muscular signals were stable, therefore the biceps muscle movement produces an electrical potential generated by the muscle cells, this activity is received by a MyoWare sensor, located in the muscle of the drive. A solution plan was elaborated according to the inductive method to behave towards the signal, processing the drive pulse by a servo controller that will put in motion three microserves located in the foream of the prototype, opening and closing the hand, also this method applied dimensioning of the prosthesis structure through a scaling process in relation to his right hand, parts of the hand were printed in 3D pieces of two types of materials, Acrylonitrile Butadiene Styrene (ABS) for the hand sector by the hardness characteristics of the material and the Polyacid Lactic (PLA) for the forearm as it is a resistant and lightweight polymer. With results of the experimental method 83.9% similarities with the right hand, a weight of 98.13% identical to the aesthetic prosthesis. It is concluded, that the prosthesis has a correct operating to react in a time of 2.3 seconds to child’s signals and 0.26 seconds to signals of an adult muscle. Finally it costs $800 which is relatively low compared a prosthesis of similar characteristics that surround the amount of $ 29,379. It is recommended that this kind of prosthesis is used at one year of age to contribute in not generating an atrophied muscle.