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A unit to provide a capability for programmable real-time adjustment of stimulus intensity to a hand-held stimulator for drop foot correction applications

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2 Author(s)
Lyons, G.M. ; Dept. of Electron. & Comput. Eng., Limerick Univ., Ireland ; Breen, P.

This paper describes the design of an intelligent drop foot stimulator unit for use in conjunction with a commercial NMES unit, the NT2000. The developed micro-controller unit interfaces to a PC and a GUI allows the clinician to graphically specify the shape of the stimulation intensity envelope required for subject undergoing drop foot correction. The developed unit is based on the ADuC812S micro-controller evaluation board from analog devices and uses two FSR-based foot-switches to control application of stimulus. The unit has the ability to display diagnostic data to clinician indicating how the stimulus intensity envelope is being delivered during walking using a data capture capability. The developed system has a built-in algorithm to adjust the deliver of stimulus to reflect changes in gait cycle time.

Published in:

Engineering in Medicine and Biology Society, 2003. Proceedings of the 25th Annual International Conference of the IEEE  (Volume:2 )

Date of Conference:

17-21 Sept. 2003