Analyses of thoracic and lumbar spine injuries in frontal impacts

Adolph, Thorsten<sup>1</sup>; Wisch, Marcus<sup>1</sup>; Eggers, Andre<sup>1</sup>; Johannsen, Heiko<sup>2</sup>; Cuerden, Richard<sup>3</sup>; Carroll, Jolyon<sup>3</sup>; Hynd, David<sup>3</sup>; Sander, Ulrich<sup>4</sup>

In general the passive safety capability is much greater in newer versus older cars due to the stiff compartment preventing intrusion in severe collisions. However, the stiffer structure which increases the deceleration can lead to a change in injury patterns.

In order to analyse possible injury mechanisms for thoracic and lumbar spine injuries, data from the German In‐Depth Accident Study (GIDAS) were used in this study. A two‐step approach of statistical and case‐by‐case analysis was applied for this investigation.

In total 4,289 collisions were selected involving 8,844 vehicles, 5,765 injured persons and 9,468 coded injuries. Thoracic and lumbar spine injuries such as burst, compression or dislocation fractures as well as soft tissue injuries were found to occur in frontal impacts even without intrusion to the passenger compartment. If a MAIS 2+ injury occurred, in 15% of the cases a thoracic and/or lumbar spine injury is included. Considering AIS 2+ thoracic and lumbar spine, most injuries were fractures and occurred in the lumbar spine area.

From the case by case analyses it can be concluded that lumbar spine fractures occur in accidents without the engagement of longitudinals, lateral loading to the occupant and/or very severe accidents with MAIS being much higher than the spine AIS.

Keywords: accident analysis, injuries, frontal impact, lumbar spine, thoracic spine

Year

Entry

1962

Garrett JW, Braunstein PW. The seat belt syndrome. J Trauma. May 1962;2(3):220-238.

2010

Carroll J, Adolph T, Chauvel C, Labrousse M, Trosseille X, Pastor C, Eggers A, Smith S, Hynd D. Overview of serious thorax injuries in european frontal car crash accidents and implications for crash test dummy development. In: Proceedings of the 2010 International IRCOBI Conference on the Biomechanics of Impact. September 15-17, 2010; Hannover, Germany.217-234.

2003

Otte D, Krettek C, Brunner H, Zwipp H. Scientific approach and methodology of a new in-depth-investigation study in germany so called GIDAS. In: Proceedings of the 18th International Technical Conference on the Enhanced Safety of Vehicles (ESV). May 19-22, 2003; Nagoya, Japan.

2001

Foret-Bruno J-Y, Trosseille X, Page Y, Huère J-F, Le Coz J-Y, Bendjellal F, Diboine A, Phalempin T, Villeforceix D, Baudrit P, Guillemot H, Coltat J-C. Comparison of thoracic injury risk in frontal car crashes for occupant restrained without belt load limiters and those restrained with 6 kN and 4 kN belt load limiters. Stapp Car Crash J. 2001;45:205-224. SAE 2001-22-0009.

2006