Details:

• Creators:
  Rupp, Jonathan D. ; Flannagan, Carol A. C. ; Kuppa, Shashi M.

  Rupp, Jonathan D. ; Flannagan, Carol A. C. ; Kuppa, Shashi M. Less -
• Corporate Creators:
  University of Michigan. Transportation Research Institute
• Corporate Contributors:
  United States. Department of Transportation. National Highway Traffic Safety Administration
• Subject/TRT Terms:
  [+]

  Crash Injuries Crash Injuries--Risk Assessment Crushing Injuries Injury Types Knee Patellofemoral Joint--Wounds And Injuries Pelvis Pelvis--Wounds And Injuries Risk Assessment
• Publication/ Report Number:
  UMTRI-2009-08
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  University of Michigan. Transportation Research Institute
• Abstract:
  This report describes how new injury risk curves for the knee/distal femur and the hip were
  
  developed through reanalyses of existing peak knee impact force data. New hip injury risk
  
  curves were developed using survival analysis with a lognormal distribution. This distribution
  
  was parameterized to account for the effect of stature, which was the only subject characteristic
  
  that had a statistically significant effect on the relationship between peak force applied to the hip
  
  and the risk of hip fracture. The empirically defined effects of hip flexion and abduction from a
  
  standardized seated driving posture on mean hip fracture force were also incorporated into the
  
  lognormal distribution as mean shifts. Injury risk curves for the midsize male crash test dummy
  
  were defined by applying the stature associated with this dummy and posture of 30° flexion and
  
  15° abduction from a standard reference posture and the standard reference posture (0°flexion,
  
  0° adduction) to the lognormal distribution.
  
  A new risk curve describing the relationship between peak force applied at the knee and the
  
  likelihood of knee/distal femur fracture was developed by applying survival analysis to an
  
  existing dataset in which there was uncensored, left censored, and right censored peak knee
  
  impact force data. This risk curve is similar to that currently used by the NHTSA to assess the
  
  risk of AIS 2+ KTH injury. Because the fracture forces in the dataset used to develop the new
  
  knee/distal femur risk curve were primarily from tests where rigid surfaces loaded the knees of
  
  elderly midsize male cadavers, the new risk curve only applies to rigid knee impacts and this
  
  segment of the occupant population. Future work should focus on developing knee/distal femur
  
  risk curves that apply to other segments of the driving population by characterizing and
  
  accounting for the effects of subject factors and impact surface rigidity on KTH fracture forces.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  [+]

  urn:sha256:89390f646658927dd3b24436deeb6de93747802176f5d73fabaed09a622e1a4f
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17692/dot_17692_DS1.pdf
• File Type:
  [PDF-1.14 MB]