The Victoria Hand
Victoria Hand Project
The Victoria Hand is a body-powered prosthesis consisting of a hand for amputee.
The Victoria Hand is a body-powered prosthesis consisting of a hand, a wrist, a limb-socket, and a harness. It has a natural appearance and is custom-made to fit each amputee. The hand allows the amputee to perform a range of activities needed. The Victoria Hand closes when activated into an adaptive grasp, allowing users to have a dynamic range of grip strength.
Countries: Guatemala, Nepal, Cambodia, Haiti, Ecuador, Eygpt, Uganda, Kenya
Goal 3: Good health and well-being
Target users are trans-radial and trans-humeral amputees.
Victoria Hands are manufactured at their clinics at Guatemala, Ecuador, Nepal, Cambodia, Haiti, Egypt, Uganda, and Kenya.
Over 120 Victoria Hand have been distributed as of 2019.
Skilled/unskilled required ability or training necessary to construct and fit a product for a patient
% of users reporting being satisfied with the product as determined by independent patient studies
% of patients reporting daily use of the product as determined by independent patient studies
% of patients reporting comfortable use of product in independent patient studies
3D scanning is used to capture the unique shape of the individual’s limb, to thereby 3D print a customized socket for that user.
Full system solution includes: Hand, Wrist, Socket & Hardness
Silicone is used for fingertips to prevent slipping.
Rotatable Thumb: The thumb can be rotated by the user allowing it to hold various positions. This includes a one-finger pinch, a two-finger pinch, a power grasp, or a lateral grasp.
Backlock Mechanism: The voluntary close (VC) model contains the back-lock mechanism and allows the user to lock the hand closed, for tasks such as carrying bags, or constant grip onto objects.
Rotatable Wrist: The wrist contains a ball-and-socket mechanism that allows the user to quickly and easily change the orientation of the hand. This wrist can rotate the hand up to 360 degrees, while simultaneously being flexed or extended by 25 degrees.
Adaptive Grasp: The adaptive gripping mechanism makes it easier for your fingers to catch the shape of an oddly shaped object.
There are three different arm prosthesis currently available from the Victoria Hand Project:
Trans-radial suspension (short-forearm)
5 -10 years
Designer specified performance targets include : low-cost, improve user’s quality of life especially amputees in developing countries.
Marino, M., Pattni, S., Greenberg, M., Miller, A., Hocker, E., Ritter, S., & Mehta, K., 2015, Access to prosthetic devices in developing countries: Pathways and challenges. In 2015 IEEE global humanitarian technology conference (GHTC), pp. 45-51.
Dechev, N., Cleghorn, W. L., & Naumann, S., 2001, Multiple finger, passive adaptive grasp prosthetic hand. Mechanism and machine theory, 36(10), pp. 1157-1173.
Massa, B., Roccella, S., Carrozza, M. C., & Dario, P., 2002, Design and development of an underactuated prosthetic hand. In Proceedings 2002 IEEE international conference on robotics and automation (Cat. No. 02CH37292), Vol. 4, pp. 3374-3379.
Dalley, S. A., Wiste, T. E., Withrow, T. J., & Goldfarb, M., 2009, Design of a multifunctional anthropomorphic prosthetic hand with extrinsic actuation. IEEE/ASME transactions on mechatronics, 14(6), pp. 699-706.
Millstein, S. G., Heger, H., & Hunter, G. A., 1986, Prosthetic use in adult upper limb amputees: a comparison of the body-powered and electrically powered prostheses. Prosthetics and orthotics international, 10(1),pp. 27-34.
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