Translation. Region: Russian Federal
Source: Novosibirsk State University –
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The 10th National Forum of the Rehabilitation Industry and Universal Design "Hope for Technology", dedicated to demonstrating comprehensive solutions for creating an accessible environment, modern technologies for people with disabilities, was held in Moscow on July 10-11. The large-scale exhibition display of Russian manufacturers presented more than 450 domestic solutions in 9 areas: prostheses, orthoses and functional units, rehabilitation equipment and exercise machines. The biomechanics and medical engineering group of the Novosibirsk State University, which consists of students from several faculties, presented its developments to the professional community. This scientific group was created on the basis of Mathematical center in Akademgorodok
The exhibition of assistive technologies was attended by the head of the group, candidate of physical and mathematical sciences Vladimir Serdyukov, 4th year students Faculty of Mechanics and Mathematics of NSU Daria Korostovskaya and Alexander Niukkanen, 3rd year student Faculty of Mechanics and Mathematics of NSU Tatyana Shashkina, 5th year student Institute of Medicine and Medical Technologies NSU Sofia Eksharova, 2nd year master's student Faculty of Mechanics and Mathematics of NSU Andrey Karavan, Master's degree graduate Faculty of Geology and Geophysics of NSU Innokenty Serdyuk and postgraduate student of the Institute of Thermal Physics SB RAS Konstantin Lebeda. Young researchers got acquainted with developments in the field of assistive technologies, learned a lot of interesting things, showed the results of their projects, received feedback and acquired valuable contacts for further cooperation.
At their stand, the young researchers presented a motion capture system for studying the kinematics of patients’ walking, as well as an adaptive prosthetic socket for a hand prosthesis using 3D printing technology.
The group also presented its latest developments: a 3D-printed prosthetic foot for activity levels 1–2 and insoles for gait biomechanics diagnostics for amputees, which will complement and improve the motion capture system.
— The most feedback was received by one of our new developments, which was tested for the first time at the forum — a foot prosthesis printed on a 3D printer. Working on this project, we set ourselves the following goal: to make a foot prosthesis that would have a low cost, be easy to manufacture, have the ability to be personalized and manufactured in a short time using simple equipment, which would increase its availability, but at the same time maintain the general biomechanics of walking. An important point is that our prosthesis belongs to activity levels 1-2 and is intended only for walking, but is not suitable for running or sports. To develop the geometry, a digital stand was used that imitates human loads when walking. This way, we were able to create a prosthesis geometry that meets the goal, — said Andrey Karavan.
For the precise design of the prosthesis, 3D modeling and load analysis technologies in Ansys were used. Manufacturing using FDM printing technology took about 12 hours. The weight of the finished product was about 700 grams. This project received financial support from the Ministry of Science and Innovation Policy of the Novosibirsk Region.
The first time a patient tested a printed prosthesis was at the forum. The guys offered to test and evaluate it to the head of the prosthetic center "Instep" (St. Petersburg), who is an amputee himself.
— He liked that the sole is non-slip – even on wet floor tiles, which allows the user to take a shower without the risk of falling. However, he pointed out the shortcomings and shortcomings regarding the geometry of the product and made constructive suggestions for its improvement. His opinion is very important to us, and taking this feedback into account, we will adjust the prosthesis model and organize re-testing on other amputees. It will not be difficult to make adjustments due to the simplicity of the technology, — explained Daria Korostovskaya.
Another new development of the NSU biomechanics and medical engineering group attracted great interest from the forum participants — a pressure insole that will accurately determine the step phases and gait asymmetry. This “smart” insole was previously tested together with a motion capture system for analyzing gait kinematics. The invention will allow specialists in prosthetic centers to analyze the distribution of the load between healthy and amputated limbs, evaluate the distribution of pressure on the foot or prosthesis, and the dynamics of rehabilitation outside the clinic. This project received support from the FSI Foundation as part of the Student Startup competition.
— The video we recorded while testing this insole shows the distribution of the load on the foot when walking. It is important that it allows us to divide the gait cycles into support and transfer phases. We have the opportunity to analyze their ratio and draw conclusions about the gait asymmetry indicator of amputees, which is important for monitoring rehabilitation and correct placement of the prosthesis. When diagnosing the biomechanics of amputees' gait, such insoles are placed in shoes under both the patient's healthy foot and the prosthesis. To transmit and read data from the insole, we developed software for processing and visualizing the data, — said Tatyana Shashkina.
Young researchers plan to combine the motion capture system with a "smart" insole. During early research, the guys came to the conclusion that combining these technical solutions will allow for a more complete gait analysis. The motion capture system records the kinematics of the gait, and the insole records the pressure of the foot and prosthesis on the surface. By combining these data, it is possible to track the biomechanical indicators and symmetry of the patient's gait, which is of great importance for assessing the progress of rehabilitation and adjusting the prosthesis settings.
This development has attracted great interest from representatives of prosthetic centers, some of whom have expressed interest in testing it in their institutions and working together. Among them are the Alorto prosthetic and orthopedic center (Barnaul) and the Ortho-Innovation prosthetic center (Moscow).
— We will be glad to cooperate with these and other prosthetic centers, including because during joint testing we will be able to replenish the database of gait kinematics of patients with lower limb amputations, which we are currently forming in the course of joint work with the Novosibirsk branch of the Moscow Prosthetic and Orthopedic Enterprise. In addition, at the forum we received a request to develop an adaptive prosthetic socket for a leg using 3D printing technology, similar to our existing development of a prosthetic socket for an arm. This is exactly what we intend to do in the near future, — Vladimir Serdyukov summed up.
Material prepared by: Elena Panfilo, NSU press service
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