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Reliability of Movement Workspace Measurements in a Passive Arm Orthosis Used in Spinal Cord Injury Rehabilitation

By Rudhe, Claudia; Albisser, Urs; Starkey, Michelle L.; Curt, Armin; Bolliger, Marc; Journal of NeuroEngineering and Rehabilitation, Volume 9, Number 37
Publication Date: June 9, 2012

Study evaluated the reliability of movement measures as assessed in the Armeo Spring System for the eventual application to the rehabilitation of patients with cervical spinal cord injury (SCI). The Armeo Spring system is used in the rehabilitation of upper limb function in stroke and SCI patients. The device has 7 degrees of freedom and is equipped with 7 potentiometers to measure the joint angles. These measurements are used to calculate the endpoint position of the hand in space. Study participants were 8 patients with cervical SCI aged 35 to 67 years, 4 of whom were female, and 20 nondisabled controls. Intra and inter rater reliability of the movement workspace, representing multiple ranges of movement, and the influence of 5 varying seating conditions was assessed using the controls. The test-retest reliability was assessed in the SCI patients as well as a correlation of the movement workspace to retrieve self care items as scored by the spinal cord independence measure (SCIM3). Analysis of workspace measures in the controls revealed intra class correlation coefficients (ICC) ranging from 0.747 to 0.837 for the intra rater reliability and from 0.661 to 0.855 for the inter rater reliability. Test-retest analysis in SCI patients showed a similar high reliability with ICC equivalent to 0.858. Also the reliability of the movement workspace between different seating conditions was good, with ICCs ranging from 0.844 to 0.915. The movement workspace correlated significantly with the SCIM3 self care items. These findings suggest that measures retrieved from a training device such as the Armeo Spring can be used to monitor changes in upper limb function over time, and might also be valuable to document the progress of clinical rehabilitation.
Published by: BioMed Central Ltd   (Website:http://www.biomedcentral.com)

Link to text: http://www.jneuroengrehab.com/content/pdf/1743-0003-9-37.pdf
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