Whole-body vibration transmissibility in supine humans: effects of board litter and neck collar.
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.
Center for Computer-Aided Design, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA.
John
J
Meusch
Department of Civil and Environmental Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA; Center for Computer-Aided Design, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA. Electronic address: salam-rahmatalla@uiowa.edu.
Salam
S
Rahmatalla
D006257:Head; D006801:Humans; D008297:Male; D009333:Neck; D009989:Orthotic Devices; D010388:Pelvis; D013131:Spine; D016683:Supine Position; D014187:Transportation of Patients; D014732:Vibration; D055815:Young Adult
Injury; Litter; Relative-Transmissibility; Spinal board; Transmissibility