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Investigation of Pelvic Injuries on Eighteen Post Mortem Human Subjects Submitted to Oblique Lateral Impacts
Published November 07, 2016 by The Stapp Association in United States
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The aim of this study was to investigate the sacroiliac joint injury mechanism. Two test configurations were selected from full scale car crashes conducted with the WorldSID 50th dummy resulting in high sacroiliac joint loads and low pubic symphysis force, i.e. severe conditions for the sacroiliac joint. The two test conditions were reproduced in laboratory using a 150-155 kg guided probe propelled respectively at 8 m/s and 7.5 m/s and with different shapes and orientations for the plate impacting the pelvis. Nine Post Mortem Human Subject (PMHS) were tested in each of the two configurations (eighteen PMHS in total). In order to get information on the time of fracture, eleven strain gauges were glued on the pelvic bone of each PMHS.
Results - In the first configuration, five PMHS out of nine sustained AIS2+ pelvic injuries. All five presented sacroiliac joint injuries associated with pubic area injuries. In the second configuration, four specimens out of nine sustained AIS2+ pelvic injuries. Two of them presented sacroiliac joint fractures associated with pubic area injuries. The other two presented injuries at the pubic area and acetabulum only. The strain gauges signals suggested that the pubic fractures occurred before the sacroiliac joint fractures in the great majority of the cases (five cases out of seven).
Conclusions - Even in the oblique impact conditions of the present study, the pubic symphysis area was observed to be the weakest zone of the pelvis and its failure the predominant cause of sacroiliac joint injuries. It was hypothesized that the failure of the pubic rami allowed the hemi-pelvis to rotate inward, and that this closing-book motion induced the failure of the sacroiliac joint.
- Matthieu Lebarbé - CEESAR
- Pascal Baudrit - CEESAR
- Pascal Potier - CEESAR
- Philippe Petit - LAB PSA Peugeot Citroën Renault
- Xavier Trosseille - LAB PSA Peugeot Citroën Renault
- Sabine Compigne - Toyota Motor Europe NV/SA
- Mitsutoshi Masuda - Toyota Motor Corporation
- Takumi Fujii - Toyota Motor Corporation
- Richard Douard - Université René Descartes, Paris
CitationLebarbé, M., Baudrit, P., Potier, P., Petit, P. et al., "Investigation of Pelvic Injuries on Eighteen Post Mortem Human Subjects Submitted to Oblique Lateral Impacts," SAE Technical Paper 2016-22-0005, 2016, https://doi.org/10.4271/2016-22-0005.
- AAAM. (2005). Abbreviated Injury Scale 2005. Barrington, IL 60011 USA.
- Baudrit P., Petitjean A., Potier P., Trosseille X., Vallancien G. (2014). Comparison of the thorax dynamic responses of small female and midsize male post mortem human subjects in side and forward oblique impact tests. Stapp Car Crash Conference San Diego, California, United States, November 10-12.
- Bouguennec, N., Gouin, F., Piétu, G. (2012) Isolated anterior unilateral sacroiliac dislocation without pubic arch disjunction. Orthopaedics & Traumatology : Surgery & Research 98: 359-362.
- Cesari, D. and Ramet, M. (1982). Pelvic tolerance and protection criteria in side impact. Proc. 26th Stapp Car Crash Conference, pp. 145-155. Society of Automotive Engineers, Warrendale, PA.
- Kemper A., McNally C., and Duma S. (2009). load transfer and deformation characteristics of the pelvis in non-destructive side impact testing. 21st International Technical Conference on Experimental Safety Vehicles (ESV) Stuttgart, Germany, June 15-18.
- Marcus, J., Morgan, R., Eppinger, R., Kallieris, D., Mattern, R. and Schmidt, G. (1983) Human Response to and Injury from Lateral Impact. Proc. 27th Stapp Car Crash Conference, pp.419-432. Society of Automotive Engineers, Warrendale, PA.
- Miller, C. S., Madura, N. H., Schneider, L. W., Klinich, K. D., Reed, M. P., Rupp, J. D. (2013) PMHS Impact Response in 3 m/s and 8 m/s Nearside Impacts with Abdomen Offset. Proc. of Stapp Car Crash Conference Orlando, Florida, United States, November 11-13.
- Nyquist, G., & Murton, C. (1975). Static Bending Response of the Human Lower Torso. Proc. 19th Stapp Car Crash Conference, pp. 513-541. Society of Automotive Engineers, Warrendale, PA.
- Petit P., Trosseille X., Lebarbé M., Baudrit P., Potier P., Compigne S., Masuda M., Yamaoka A., Yasuki T., Douard R. (2015). A comparison of sacroiliac and pubic rami fracture occurrences in oblique side impact tests on nine post mortem human subjects. Stapp Car Crash Conference New Orleans, LA, United States, November 9-11.
- Salzar, R., S., Genovese, D., Bass, C., R., Bolton, J., R., Guillemot, H., Damon, A., M., Crandall, J., R., (2009). Load path distribution within the pelvic structure under lateral loading. International Journal of Crashworthiness 14 (1), p. 99-110.
- Tile M. (2003) Fractures of the Pelvis and Acetabulum. 3rd ed. Philadelphia: Williams & Wilkins.
- Toth, L., and Balogh, Z. (2010). Isolated unilateral sacroiliac dislocation without anterior pelvic ring diruption. The Journal of Trauma, Injury, Infection and Critical Care. Volume 68. Number 3. March 2010.
- Trosseille, X., Baudrit, P., Leport, T., Vallancien, G. (2008) Rib cage strain pattern as a function of chest loading configuration. Stapp Car Crash Journal 52: 205-231.
- Wright V, Zelle BA, Prayson, M, (2004). Bilateral sacroiliac joint dislocation without associated fracture or anterior pelvic ring injuries. Journal of Orthopeadic Trauma, 2004 Oct;18(9):634-7
- Young, J. W., and Resnik, C. S. (1990). Fracture of the pelvis: Current concepts of classification. American Journal of Roentgenology, 155, 1169-1175.
- Zhu, J., Cavanaugh, J. and King, I. (1993) Pelvic biomechanical response and padding benefits in side impact based on a cadaveric test series. Proc. 37th Stapp Car Crash Conference, pp.223-233. Society of Automotive Engineers, Warrendale, PA.