Pelvis Injury Risk Curves in Side Impacts from Human Cadaver Experiments Using Survival Analysis and Brier Score Metrics
Post Mortem Human Surrogate (PMHS) experiments are used for describing tolerance and improve safety. For nearside impacts, the United States Standard Federal Motor Vehicle Safety Standards (FMVSS-214) used PMHS tests and binary regression methods to achieve these goals. Since this promulgation, Parametric Statistical Survival Modeling (PSSM) has become a de facto standard for developing injury risk curves (IRCs). This study is focused on pelvic injuries from side impacts. The objectives are as follows: analyze impactor-based intact PMHS tests and develop IRCs at different AIS levels using the force metric and examine the effectiveness of other force-related variables on IRCs. Impactor-driven pelvic tests conducted using whole body PMHS were selected from published studies. The dataset had 63 tests. Peak force, 3-ms clip force, and impulse were used to develop IRCs for Abbreviated Injury Scores (AIS) AIS2+ and AIS3+, i.e., groups A and B. Brier Score Metric (BSM) was used for ranking metrics. 95% confidence intervals were computed, Normalized Confidence Interval Sizes (NCIS) were determined, and quality of the IRCs were obtained. Impulse best described the underlying response of the pelvis. BSMs were the lowest for the impulse for both groups. At 10% and 50% probabilities, impulses were 71 Ns and 125 Ns for group A and 79 Ns and 160 Ns for group B; peak forces were 3.8 kN and 7.1 kN and 4 kN and 10 kN for groups A and B; and clip forces were 2.7 kN and 6.5 kN and 3.6 kN and 8.6 kN, for groups A and B. NCIS at discrete probability levels, qualities of risk curves, and individual IRCs are given. This study underscores the importance of using impulse to describe pelvis injury criteria in lateral impacts. These findings are applicable to anthropomorphic test devices, as matched pair tests are done to determine dummy-based injury criteria/injury assessment risk curves (IARCs). Although IRCs have been developed for WorldSID, it may be appropriate to use impulse-based IARCs. Because THOR is a potential device for automated vehicle environments, it may be appropriate to develop THOR-based IARCS. The present IRCs act as fundamental human-based injury criteria. These responses can also be used in human body and subsystem computational models.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/49192340
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Supplemental Notes:
- The work of Narayan Yoganandan and Frank Pintar was authored as part of their official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 USC. 105, no copyright protection is available for such works under US Law. John R. Humm, Nicholas DeVogel, Anjishnu Banerjee, and Jeffrey T. Somers hereby waive their right to assert copyright, but not their right to be named as co-authors in the article Abstract republished with permission of Taylor & Francis.
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Authors:
- Yoganandan, Narayan
- Humm, John R
- DeVogel, Nicholas
- Banerjee, Anjishnu
- Pintar, Frank A
- Somers, Jeffrey T
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Conference:
- 63rd Annual Scientific Conference of the Association for the Advancement of Automotive Medicine (AAAM)
- Location: Madrid , Spain
- Date: 2019-10-15 to 2019-10-18
- Publication Date: 2019-11
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp S137-S142
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Serial:
- Traffic Injury Prevention
- Volume: 20
- Issue Number: sup2
- Publisher: Taylor & Francis
- ISSN: 1538-9588
- Serial URL: http://www.tandf.co.uk/journals/titles/15389588.html
Subject/Index Terms
- TRT Terms: Cadavers; Crash injuries; Crash victim simulation; Dummies; Pelvis; Physiology; Side crashes
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 01736376
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 20 2020 10:56AM