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Translational Energy Criteria and Its Correlation With Head Injury in the Sub-Human Primate
Technical Paper
1987-13-0018
Published September 08, 1987 by International Research Council on Biokinetics of Impact in Switzerland
Sector:
Language:
English
Abstract
In recent years, the "Mean Strain Criterion" (MSC) for
head impacts has been re-evaluated and an improved version
formulated. The old MSC models were upgraded and reported at a
previous IRCOBI conference. Based on these models, now called
"Translational Head Injury Models" (THIM) and 37 lateral
head impacts to three species of primates, a new head injury
criteria is presented.
In this study, it was assumed that the THIM are lumped parameter
models of the head and that the elements of the models, in a broad
sense have a physical counterpart in the head. It was also assumed
that energy going into the head (model) is one of the major
parameters that cause head injury in an impact situation.
Furthermore, it was postulated that the higher the impact energy
level, the greater the potential for head injury.
The energy stored or dissipated by each model element is plotted
with respect to time. The peak energy or power values were
correlated with the Abbreviated Injury Scale (AIS) or skull
fracture. The result of this effort is the Translational Energy
Criteria (TEC) in the form of injury predictive functions for both
skull fracture or brain contusion.
The acceleration response of the large mass of the lateral THIM
was used to compute the Head Injury Criteria (HIC) for each primate
head impact and correlated with the AIS injury number. It was
concluded that the Translational Energy Criteria from the THIM and
the HIC values from the THIM, both correlated very well with head
injury. But, the TEC was more comprehensive and revealed more
injury detail than the HIC.