Quantification of Sternum Morphomics and Injury Data 2019-01-1217
Crash safety researchers have increased concerns regarding thoracic injury causation and the contributing factors among the elderly population. The objective of this study is two-fold (1) quantify the sternum morphomics as a function of age and (2) document sternum fracture trends using CT scans and crash data as a function of age. The morphomics analysis was extracted from 786 thoracic computed tomography (CT) scans from the University of Michigan Hospital to measure thoracic depth, sternum joint angle, thickness, and bone density. The sternum fractures were extracted from 62 International Center for Automotive Medicine (ICAM) crash cases, of which 22 cases had corresponding CT scans. The University of Michigan Internal Review Board (HUM00043599 and HUM00041441) approved the used of crash cases and CT scan data.
Morphomic analysis showed the sternum thickness increased from youngest to oldest age groups. Thoracic depth increased, with the exception of the 60-74-year-old age group. Both the sternum bone density and joint angle decreased from youngest to oldest age groups. The frequency of sternum fractures increased after age 45. Fractures were most frequent in the sternum body. The seat belt webbing was coded as the source of 54% of the sternum fractures.
Barbara LaShawn Bunn, Suzanne Johannson, Carla Kohoyda-Inglis, Stewart Wang, Chantal Parenteau, Sven Holcombe
General Motors, University of Michigan Hospital