Leonuid N Solomin
Vreden National Medical Research Center of Traumatology and Orthopedics, Russian FederationTitle: Angulation, Translation, and Rotation Capabilities of a Minimized Orthopedic Hexapod Ortho-SUV Frame (OSFm): An Experimental Study
Abstract
A double suction centrifugal type of pump was converted into a hydraulic turbine (pat-pump acting as turbine). The casing was maintained and the pump impeller was replaced by a hydraulic runner. It was made of stainless steel with a diameter of 0.662 meter. It had 12 blades as compared to the 5 blades of the original pump impeller. It was assembled inside the original pump casing and was installed along the existing 0.9 m diameter water pipeline of the rio verde water consortium inc. Water treatment plant has an elevation of around 100 meters above sea level. A bypass line was connected along the existing pipeline to accommodate the installation of the PAT
A minimized version of this hexapod (minimized Ortho-SUV Frame - OSFm) was created to reduce the common of this group’s frame disadvantages: large bulkiness and weight and limitation on working with “short segments”. Aim of tre study was to identify the correction capabilities of OSFm compared to OSF.
The result of bench test showed the value of the maximum distraction of OSF and OSFm fixing the struts directly to the rings and using straight plates is the same (p>0.05): 71.8 – 72.5 mm. Using Z-plates, OSFm possibilities exceeds OSF by 27.3%. In translation OSFm with fixation of struts directly to the rings provides movement of distal fragment within 111,8 – 127,2 mm (exceeds the results of OSF by 5,7 - 7,9%). OSFm provides movement using straight plates within 92,8 – 106,1 mm (exceeds OSF by 7 – 4,8%), using Z-plates within 112 - 129,7 mm (exceeds OSF by 23,9 – 29,3%). In angulation OSFm with fixation of struts directly to the rings provides movement of distal fragment within 71,9 – 89,9 degrees (exceeds OSF by 35,4 – 55,27%). OSFm provides movement using straight plates within 53,3 – 68,2 degrees (exceeds OSF by 46,4 – 36,9%), using Z-plates within 53,6 – 96,9 degrees (exceeds OSF by 36,4 – 27%). In the study of rotation OSFm with fixation of struts directly to the rings provides movement of distal fragment within 105,1 - 108,7 degrees (exceeds OSF by 23,2 - 23,4%). OSFm provides movement using straight plates within 76,6 -79,2 degrees (exceeds OSF by 41,3 – 37,5%), using Z-plates within 89,2 – 90,5 degrees (exceeds OSF by 21,5 – 20,3%).
The data obtained indicate that OSFm completed with standrd size of struts, in comparison with OSF accompanied with short size of struts, has better reduction capabilities for deformity correction.
Biography
Leonid N. Solomin, MD, PhD
Orthopaedic Surgeon
Professor of Orthopaedic Surgery
Leading Researcher, Vreden National Medical Research Center of Traumatology and Orthopedics (St.Petersburg, Russia)
Honorable Professor of Russian Ilizarov Scientific Center “Restorative Traumatology and Orthopedics” (Kurgan, Russia)
Experience in the field of Limb Lengthening and Reconstruction Surgery - 35 years.
Author and co-author of over 570 published articles and abstracts, 6 monographs, 36 chapters in monographs and 69 patents of Russia. The two manuals, published by Springer Verlag, have English (https://www.springer.com/gp/book/9788847026186) and Chinese versions.
Supervisor of 14 Ph.D. theses.
Member of ASAMI International, ASAMI Russia and AO/ASIF.
Faculty in AO Russia and AO International.
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