It can hold a credit card, use a keyboard with the index finger, and lift a bag weighing up to 20 kg – the world’s first commercially available pros-thetic hand that can move each finger separately and has an astounding range of grip configurations.
For the first time worldwide a patient at the Orthopedic University Hospital in Heidelberg has tested both the “i-LIMB” hand in comparison with another innovative prosthesis, the so called ”Flu-idhand”. Eighteen-year-old Sören Wolf, who was born with only one hand, is enthusiastic about its capabilities.
The new prosthetic hand developed and distributed by the Scottish com-pany “Touch Bionics” certainly has advantages over previous models. For example, a comparable standard product from another manufacturer al-lows only a pinch grip using thumb, index, and middle finger, and not a grip using all five fingers. This does not allow a full-wrap grip of an object.
Myoelectric signals from the stump of the arm control the prosthesisComplex electronics and five motors contained in the fingers enable every digit of the i-LIMB to be powered individually. A passive positioning of the thumb enables various grip configurations to be activated. The myoelectric signals from the stump control the prosthetic hand; muscle signals are picked up by electrodes on the skin and transferred to the control electron-ics in the prosthetic hand. Batteries provide the necessary power.
"Fluidhand" prosthetic device offers better finishing and better grip function
The flexible drives are located directly in the movable finger joints and operate on the biological principle of the spider leg – to flex the joints, elastic chambers are pumped up by miniature hydraulics. In this way, in-dex finger, middle finger and thumb can be moved independently. The prosthetic hand gives the stump feedback, enabling the amputee to sense the strength of the grip.Thus far, Sören has been the only patient in Heidelberg who has tested both models. “This experience is very important for us,” says Simon Steffen, Director of the Department of Upper Extremities at the Orthopedic University Hospital in Heidelberg. The two new models were the best of those tested, with a slight advantage for Fluidhand because of its better finishing, the programmed grip configurations, power feedback, and the more easily adjustable controls. However, this prosthetic device is not in serial production. “First the developers have to find a company to produce it,” says Alfons Fuchs, Director of Orthopedics Engineering at the Orthope-dic University Hospital in Heidelberg, as the costs of manufacturing it are comparatively high. However it is possible to produce an individual model. Thus far, only one patient in the world has received a Fluidhand for every-day use. A second patient will soon be fitted with this innovative prosthe-sis in Heidelberg.
Dr. Annette Tuffs | EurekAlert!
The genes are not to blame
20.07.2018 | Technische Universität München
Targeting headaches and tumors with nano-submarines
20.07.2018 | Universitätsmedizin der Johannes Gutenberg-Universität Mainz
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences