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Blunt impacts to the back: Biomechanical response for model development.

Jason Forman1, Brandon Perry1, Kyvory Henderson1

  • 1University of Virginia Center for Applied Biomechanics, 4040 Lewis and Clark Drive, Charlottesville, VA 22911, US.

Journal of Biomechanics
|July 18, 2015
PubMed
Summary

This study investigated back impact biomechanics using cadavers, revealing common injuries like rib fractures and joint strains. Findings aid in developing better injury prediction models for torso impacts.

Keywords:
BiomechanicsChestFractureInjurySpine

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Area of Science:

  • Biomechanics
  • Injury Mechanics
  • Human Body Modeling

Background:

  • Limited data exists on torso injury mechanics from blunt back impacts.
  • Existing research primarily focuses on frontal thoracic impacts.

Purpose of the Study:

  • To characterize the biomechanical and injury response of the mid-thorax to blunt back impact.
  • To provide data for advanced injury prediction models.

Main Methods:

  • Hub-impact tests were conducted on four male cadavers at varying speeds (1.5-5.5 m/s).
  • Chest deformation was measured using a chestband; kinematics were captured by 3D motion systems.

Main Results:

  • Peak impact forces ranged from 6.9 to 10.5 kN.
  • Spinal extension angles reached 39-62°.
  • Common injuries included costovertebral/costotransverse joint strains, rib fractures (predominantly rib-neck), and ligament strains.

Conclusions:

  • Rib-neck fractures suggest an indirect loading mechanism from spinal bending moments.
  • Quantified biomechanical responses will aid in validating human body models for back impact injury prediction.