Fitzgerald, SG and Cooper, RA and Boninger, ML and Rentschler, AJ
(2001)
Comparison of fatigue life for 3 types of manual wheelchairs.
Archives of Physical Medicine and Rehabilitation, 82 (10).
1484 - 1488.
ISSN 0003-9993
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Abstract
Objectives: To examine 3 types of manual wheelchairs - ultralight wheelchairs (UWs), lightweight wheelchairs (LWs), and depot wheelchairs (DWs) - and to compare the fatigue life between the wheelchair types. Design: A database of different manual wheelchairs tested according to the International Organization for Standardization (ISO). Fatigue life was determined by using standards that define methods accepted internationally using double-drum and curb-drop testing equipment. Setting: A rehabilitation engineering center. Specimens: Sixty-one manual wheelchairs: 25 DWs, 22 UWs, and 14 LWs. Main Outcome Measures: Wheelchairs were examined for differences in fatigue life based on equivalent cycles. Unique survival curves were fit and compared for each wheelchair type. Results: The UWs lasted the longest, with a mean of 309,362 equivalent cycles. The DWs faired the worst, with a mean of 117,210 equivalent cycles. The Kaplan-Meier survival curves were significantly different (p<.001), with the UWs having the longest fatigue life. Conclusion: Fatigue life for UWs is significantly greater (p<.05) than LWs and DWs, indicating wheelchairs differ in durability. © 2001 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation.
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