Thoracic impact testing of pediatric cadaveric subjects

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Ouyang, Jun¹; Zhao, Weidong¹; Xu, Yongqing²; Chen, Weisheng³; Zhong, Shizhen¹

Thoracic impact testing of pediatric cadaveric subjects

J Trauma. December 2006;61(6):1492-1500

Affiliations

¹Department of Anatomy, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangzhou, China

²Kunming General Hospital, Kunming, China

³Fuzhou General Hospital, Fuzhou, China
Abstract and keywords

Background: This study aimed to describe the injury mechanism of children's thorax in frontal impact and provide an injury threshold.

Methods: Nine unembalmed cadavers were divided into two groups. A young cohort aged 2 to 4 years (four cadavers) was impacted by a 2.5-kg mass impactor, whereas the older cohort, aged 5-12 years (five cadavers), was impacted by a 3.5-kg mass impactor.

Results: The mean values of peak sternal viscous criterion and accelerations for the older group and younger group were 1.35 ± 0.62 m/s, 81.5 ± 29.2 g and 2.05 ± 0.5 m/s, 65 ± 20.1 g, respectively. The maximum forces in the older group (1138 ± 271.7 N) were significantly higher than those in younger group (776.3 ± 39 N). In seven specimens, injuries after the impact were found.

Conclusions: The full set of cadaveric injuries did not correlate with peak chest deformation, sternal viscous criterion, or peak fourth thoracic vertebra acceleration. However, cadaver thoracic injury showed a strong dependence on dissipated energy to peak deformation.

Keywords: Frontal impact; Child; Thorax; Injury
Links

DOI: 10.1097/01.ta.0000233711.07823.40

PubMed: 17159696

WoS: 000242989400039
History

Accepted: 2006-06-08

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