1. Fatigue testing of selected suspension manual wheelchairs using ANSI/RESNA standards 
Andrew M. Kwarciak, MS, Rory A. Cooper, PhD, William A. Ammer, BS, Shirley G. Fitzgerald, PhD, Michael L. Boninger, MD, Rosemarie Cooper, MPT, APT 
Archives of Physical Medicine and Rehabilitation 
Volume 86, Issue 1, Pages (January 2005)
DOI: /j.apmr

2. Fig 1
Three suspension manual wheelchairs used in this study: (A) Invacare A-6S, (B) Permobil Colours Boing, and (C) Sunrise Medical Quickie XTR.
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3. Fig 2
Example of the caster failures common to all Colours Boing models. This picture shows the failure of the right caster of Boing 3 on the initial DDT.
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4. Fig 3
Fracture of the right telescoping tube of the Invacare A-6S 1. The A-6S 3 experienced a similar failure of its right telescoping tube.
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5. Fig 4
Fracture of the left seat section of the frame on the Invacare A-6S 2. This same type of failure occurred on the Quickie XTR 2.
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6. Fig 5 Fracture of the seat shock frame support on the Quickie XTR 1.
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7. Fig 6 Fracture of the right caster mount of the Quickie XTR 3.
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8. Fig 7
Mean value (equivalent cycles per dollar) of each wheelchair. White bars represent the suspension wheelchairs; black bars represent the ultra-lightweight wheelchairs; gray bars represent the lightweight wheelchairs. The last 3 bars represent the average values for each wheelchair type.9,11.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )