Designing of Trans-radial Prosthetic Hand for Amputee Person

Abstract

Peoples with lost body parts are increasing in today's world, resulting in considerable hikes in health-care costs. Amputations are most commonly caused by severe traumas such as those caused by accidents or war, congenital deformities, cancers, and other medical conditions like as diabetes and peripheral artery disease. In this paper, a new design of trans-radial prosthetic hand is proposed to replace a functionality and/or appearance of the missing body part. The developed design of the prosthetic hand is based on the anatomy of a human hand. The dimensions and link length ratio which were taken for designing the proposed prosthetic hand is referenced from a biological human hand. The given joint angles ensure the maximum degree of freedom of the prosthetic hand. The joint between two links is a two-point contact joint, which significantly reduces the chances of fatigue and failure of the hand. The actuation of the distal, proximal phalanx of the thumb and the metacarpal phalanx of the thumb are independent from each other. The design of the prosthetic hand is also printed with the help of a 3D printer for better analysis of the proposed work. The material used to 3D print the design is PLA material which makes the design lightweight, economic, eco-friendly and can be more beneficial to amputee person.