Biomechanics of dependent transfers on an aircraft Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/hm50tw97w

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  • The dependent transfer of a traveler with disabilities on board an aircraft places the transferors, as well as the traveler, at risk of disabling lower back injury. This risk is increased on board an aircraft due to the confined space in which the transfer takes place. The purpose of the current study was to determine the influence of the spatial constraints commonly found on aircraft, transferee size, and transfer direction on kinetic and kinematic risk factors associated with increased risk of low back disorders, during dependent transfers on an aircraft. Also of interest was the perceived task difficulty of the transferors, and what influence this may have on the safety of the traveler being transferred. Thirty-three pairs of apparently healthy men and women worked together to perform two-person dependent transfers between a wheelchair and an airplane seat in a laboratory simulation of an aircraft interior using two sizes of anthropometric dummies. A three-way repeated measures ANOVA was used to determine the influence of spatial constraints, transferee size, and transfer direction on known kinematic and kinetic risk factors for low back injury during lifting tasks. Results indicate that the constraints significantly influenced lumbar motion of the front transferor, due to the need to reach around the seat. As a result, load moment arm was also significantly increased. Lumbar motion of the rear transferor was most influence by the size of the transferee. Flexion angles for both transfer positions were found to be greater than those known to result in high risk of low back disorder. Transferee size significantly increased lumbar loading of the rear transferor. Shorter transferors were found to experience increased lumbar motion during transfers performed from the rear position. Although constraint and transferee size influenced the perception of task difficulty, the acceleration experienced by the transferee remained unchanged. The variability associated with this measure indicates transferor safety is influenced by the persons performing the transfer. These results indicate that transferee size, the spatial constraints imposed by the aircraft interior, and transferor height all affect the risk of low-back injury during dependent transfers on an aircraft.
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  • description.provenance : Submitted by Brian Higginson (higginbr@onid.orst.edu) on 2007-08-29T01:52:48Z No. of bitstreams: 1 HigginsonDissertation.pdf: 530354 bytes, checksum: a78e2bf558d481aa1b0c337bdfa552d7 (MD5)
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  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2007-08-29T16:01:00Z (GMT) No. of bitstreams: 1 HigginsonDissertation.pdf: 530354 bytes, checksum: a78e2bf558d481aa1b0c337bdfa552d7 (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2007-09-07T17:54:09Z (GMT) No. of bitstreams: 1 HigginsonDissertation.pdf: 530354 bytes, checksum: a78e2bf558d481aa1b0c337bdfa552d7 (MD5)

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