Development of an Affordable Myoelectric Hand for Transradial Amputees

Upper limb amputations seriously affect a patient’s life by restricting their ability in performing various tasks. Prosthetic hands are considered the primary method toreinstatethelostcapabilitiesofsuchamputees.However,thepresentlyavailable prosthetic devices are unable to fulfill the requirements of users due to their excessivelyhighcost,limitedfunctionality,heavyweight,unnaturaloperation,and complexity.Thisarticlepresentsanaffordableandsimplecontrol-basedmyoelectric hand for transradial amputees. The hand setup mainly consists of a self-designed surfaceelectromyography(sEMG)sensor,amicrocontrollerunitandafive-fingered, intrinsicallyactuated3Dprintedhandfordexterousoperations.Thedevelopedhand wasimplementedwithproportionalcontrolschemeandwassuccessfullytestedonfive amputees(withmissinglowerforearms)forperforminggraspingactivitiesofdifferent objects.Further,theclosingtimeandgripforceatthefingertipswerealsodetermined forthehandtocompareitsperformancewiththecommerciallyavailablehands. KEywoRDS 3D Printing, Closing Time, Grip Force, Myoelectric Prosthesis, Proportional Control, Surface Electromyography, Transradial Amputation

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