Design and Preliminary Evaluation of a Torso Stabiliser for Individuals with Spinal Cord Injury (2403.17531v2)
Abstract: Spinal cord injuries generally result in sensory and mobility impairments, with torso instability being particularly debilitating. Existing torso stabilisers are often rigid and restrictive. We present an early investigation into a non-restrictive 1 degree-of-freedom (DoF) mechanical torso stabiliser inspired by devices such as centrifugal clutches and seat-belt mechanisms. First, the paper presents a motion-capture (MoCap) and OpenSim-based kinematic analysis of the cable-based system to understand the requisite device characteristics. The evaluation in simulation resulted in the cable-based device to require 55-60\,cm of unrestricted travel, and to lock at a threshold cable velocity of 80-100\,cm/s. Next, the developed 1-DoF device is introduced. The proposed mechanical device is transparent during activities of daily living, and transitions to compliant blocking when incipient fall is detected. Prototype behaviour was then validated using a MoCap-based kinematic analysis to verify non-restrictive movement, reliable transition to blocking, and compliance of the blocking.
- C. Barbiellini Amidei, L. Salmaso, S. Bellio, and M. Saia, “Epidemiology of traumatic spinal cord injury: a large population-based study,” Spinal Cord, vol. 60, no. 9, pp. 812–819, 2022.
- L. Britten, R. Coats, R. Ichiyama, W. Raza, F. Jamil, and S. Astill, “The effect of task symmetry on bimanual reach-to-grasp movements after cervical spinal cord injury,” Experimental Brain Research, vol. 236, no. 11, pp. 3101–3111, 2018.
- N. Sezer, S. Akkuş, and F. G. Uğurlu, “Chronic complications of spinal cord injury,” World J Orthop, vol. 6, no. 6, pp. 24–33, 2015.
- Z. D., “Essential wheelchair modifications for proper sitting posture,” Wheelchair posture and pressure sores, vol. 6, no. 6, pp. 18–38, 1984.
- R. K. Shields and T. M. Cook, “Effect on seated buttock pressure in individuals with and without spinal cord injury,” Lumbar support thickness, vol. 72, no. 3, pp. 218–26, 1992.
- A. Veldhuizen, J. Cheung, G. Bulthuis, and G. Nijenbanning, “A new orthotic device in the non-operative treatment of idiopathic scoliosis,” Medical Engineering & Physics, vol. 24, no. 3, pp. 209–218, 2002.
- S. L. Delp, F. C. Anderson, A. S. Arnold, P. Loan, A. Habib, C. T. John, E. Guendelman, and D. G. Thelen, “Opensim: open-source software to create and analyze dynamic simulations of movement,” IEEE transactions on biomedical engineering, vol. 54, no. 11, pp. 1940–1950, 2007.
- S. Schmid, L. Connolly, G. Moschini, M. L. Meier, and M. Senteler, “Skin marker-based subject-specific spinal alignment modeling: A feasibility study,” Journal of Biomechanics, vol. 137, p. 111102, 2022.
- M. Luštrek, H. Gjoreski, S. Kozina, B. Cvetkovic, V. Mirchevska, and M. Gams, “Detecting falls with location sensors and accelerometers,” in Proceedings of the AAAI Conference on Artificial Intelligence, vol. 25, no. 2, 2011, pp. 1662–1667.
- H. Cao, S. Wu, Z. Zhou, C.-C. Lin, C.-Y. Yang, S.-T. Lee, and C.-T. Wu, “A fall detection method based on acceleration data and hidden markov model,” in 2016 IEEE International Conference on Signal and Image Processing (ICSIP). IEEE, 2016, pp. 684–689.