Effect of Rear Wheel Suspension on Tilt-in-Space Wheelchair Shock and Vibration Attenuation

PM & R : the Journal of Injury, Function, and Rehabilitation
Molly Hischke, Raoul F Reiser

Abstract

Suspension systems are designed to reduce shock and vibration exposure. An aftermarket rear-wheel suspension system is now available for manual tilt-in-space wheelchairs. To compare quantifiable shock and vibration on a rigid manual tilt-in-space wheelchair to published data on manual wheelchairs and to determine whether aftermarket rear suspension system will significantly decrease shock exposure when traversing common obstacles. Cross-sectional. Research laboratory. Ten healthy non-wheelchair users. Subjects seated in a manual tilt-in-space wheelchair were pushed over 4 different obstacles (an exterior door threshold, truncated domes, 2-cm descent, and 2-cm ascent) with the chair as manufactured and with the suspension system installed. Superior/inferior and anterior/posterior accelerations were assessed at the seat pan with and without the use of ISO 2631-1 standards. Peak accelerations were analyzed from the door threshold, 2-cm descent and 2-cm ascent. Root mean square acceleration (RMSa) values were analyzed from the truncated domes, and vibration dose value (VDV) was analyzed for all surfaces. There were no differences in time spent over the 4 obstacles between rigid and suspended conditions (P≥.064). Suspension decrease...Continue Reading

References

Feb 18, 2003·Archives of Physical Medicine and Rehabilitation·Rory A CooperWilliam A Ammer
Feb 6, 2008·Journal of Rehabilitation Research and Development·Erik WolfAnnmarie Kelleher
Jun 21, 2008·Journal of Rehabilitation Research and Development·Andrew M KwarciakShirley G Fitzgerald
Jan 24, 2009·Journal of Rehabilitation Research and Development·Philip S RequejoRobert Waters
Sep 2, 2009·Assistive Technology : the Official Journal of RESNA·Brad E DiciannoKendra L Betz
Jul 4, 2013·The Journal of Spinal Cord Medicine·Yasmin Garcia-MendezRory A Cooper

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