Prediction of visceral response to multi-directional loading as measured by the chestband

Abstract Thoracic and abdominal injury outcomes are correlated to chestband-derived uniaxial metrics in post-mortem human specimen (PMHS) experiments. Yet, uniaxial metrics may neglect deformations remote from the measurement site which still may be relevant to injury risk in motor vehicle crashes....

Full description

Saved in:
Bibliographic Details
Published in:Medical engineering & physics 2012-09, Vol.34 (7), p.906-913
Main Authors: Hallman, Jason J, Yoganandan, Narayan, Pintar, Frank A
Format: Article
Language:English
Subjects:
Abdomen
Biological and medical sciences
Chestband
Computerized, statistical medical data processing and models in biomedicine
Elasticity
Finite element
Finite Element Analysis
Humans
Injuries of the abdomen. Foreign bodies of the digestive system
Injuries of the thorax. Foreign bodies. Diseases due to physical agents
Injury biomechanics
Materials Testing
Mechanical Phenomena
Medical sciences
Models and simulation
Radiology
Reproducibility of Results
Thorax
Trauma
Traumas. Diseases due to physical agents
Viscera
Viscosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract Thoracic and abdominal injury outcomes are correlated to chestband-derived uniaxial metrics in post-mortem human specimen (PMHS) experiments. Yet, uniaxial metrics may neglect deformations remote from the measurement site which still may be relevant to injury risk in motor vehicle crashes. Using 2D chestband contours from PMHS experiments, visceral strain and strain energy density responses were examined using a planar viscoelastic finite element model. The model was exercised by applying to the periphery 21 subject-specific PMHS chestband deformation patterns representing four boundary conditions: (a) lateral impact with close-proximity torso airbag, (b) stationary close-proximity torso airbag loading, (c) flat rigid lateral impact, and (d) antero-lateral oblique rigid impact. ANOVA determined that mean peak responses were dependent on boundary condition ( p < 0.002). Using matched-pair experiment injury outcomes, 50% risk of visceral trauma corresponded to localized strain and strain energy density of 1.55 and 33.0 kJ/m3 ( p < 0.1). Although strains were large, model response demonstrated sensitivity to impact boundary conditions and observed PMHS trauma. This model formulation is useful for comparative examination of injury risk from torso deformations measured experimentally using the chestband device.
ISSN:1350-4533
1873-4030
DOI:10.1016/j.medengphy.2011.10.006