Whole-body vibration transmissibility in supine humans: Effects of board litter and neck collar |
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Authors: | John Meusch Salam Rahmatalla |
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Affiliation: | 1. Department of Civil and Environmental Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA;2. Center for Computer-Aided Design, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA |
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Abstract: | Whole-body vibration has been identified as a stressor to supine patients during medical transportation. The transmissibility between the input platform acceleration and the output acceleration of the head, sternum, pelvis, head-sternum, and pelvis-sternum of eight supine subjects were investigated. Vibration files were utilized in the fore-aft, lateral, and vertical directions. The power spectral density across the bandwidth of 0.5–20 Hz was approximately flat for each file. A comparison between a baseline rigid-support and a support with a long spinal board strapped to a litter has shown that the latter has considerable effects on the transmitted motion in all directions with a double magnification in the vertical direction around 5 Hz. The results also showed that the neck-collar has increased the relative head-sternum flexion–extension because of the input fore-aft vibration, but reduced the head-sternum extension–compression due to the input vertical vibration. |
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Keywords: | Transmissibility Relative-Transmissibility Litter Spinal board Injury |
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