Design of a multichannel indentation system for measuring biomechanical properties of forearm soft tissues in vivo
Journal of Biomechanical Science and Engineering, ISSN: 1880-9863, Vol: 18, Issue: 1, Page: 22-00289-22-00289
2023
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Reports on Biomechanical Science and Engineering Findings from Zhejiang University Provide New Insights (Design of a multichannel indentation system for measuring biomechanical properties of forearm soft tissues in vivo)
2023 FEB 09 (NewsRx) -- By a News Reporter-Staff News Editor at Biotech News Daily -- Researchers detail new data in biomechanical science and engineering.
Article Description
Accurate biomechanical measurement systems are critical tools in advanced prosthetic socket designs. However, an efficient active measurement system of soft tissues, particularly for amputees in vivo, has proved lacking and challenging since rapidly changeable force and deformation of soft tissues under slope retention tests have to be captured within minimum milliseconds. In this paper, we propose a multichannel indentation system with 8 active indentation units, 8 force sensors, and a high-speed control system. The forearm diameter is measured ranging from 10mm to 140mm, which satisfies the need for forearm amputees. The FSM (finite-state machine) based control system is also designed for enhancing safety and improving the real-time properties of data acquisition. The measurement accuracies and performance are verified respectively by an accuracy experiment using a high-precision load cell and a practical test experiment recruiting a forearm amputee. As a whole, the average linearity L, hysteresis H, and repeatability R of all the 8 channel indentation units are 0.34 (%F · S), 0.69 (%F · S), and 0.99 (%F · S), respectively. The detected data from the practical experiment within 75s shows viscoelastic properties of the soft tissues. Results demonstrate that the proposed measurement system can be used for efficient biomechanical data acquisition of forearm soft tissue in vivo and has the potential clinical utility for forearm amputees.
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