Faculty Collaboration Database

Thoraco-abdominal deflection responses of post mortem human surrogates in side impacts. Stapp Car Crash J 2012 Oct;56:49-64

Date

04/30/2013

Pubmed ID

23625559

DOI

10.4271/2012-22-0002

Scopus ID

2-s2.0-84886821215 (requires institutional sign-in at Scopus site)   16 Citations

Abstract

The objective of the present study was to determine the thorax and abdomen deflections sustained by post mortem human surrogate (PMHS) in oblique side impact sled tests and compare the responses and injuries with pure lateral tests. Oblique impact tests were conducted using modular and non-modular load-wall designs, with the former capable of accommodating varying anthropometry. Tests were conducted at 6.7 m/s velocity. Deflection responses from chestbands were analyzed from 15 PMHS tests: five each from modular load-wall oblique, non-modular load-wall oblique and non-modular load- wall pure lateral impacts. The thorax and abdomen peak deflections were greater in non-modular load-wall oblique than pure lateral tests. Peak abdomen deflections were statistically significantly different while the upper thorax deflections demonstrated a trend towards significance. Deflection angulations were statistically significantly different between pure lateral and oblique tests at all regions indicating that it is important to characterize not only the amplitude but also the angle of the vector. Injuries were confined to skeletal regions in pure lateral tests and this was in contrast to the occurrence of both skeletal and soft tissue/organ injury in oblique loading tests, again emphasizing the role of obliqueness in side impacts. Furthermore, injuries in oblique tests were primarily unilateral, paralleling real-world trauma and confirming the applicability of the experimental design to field environments. Potential injury mechanisms are discussed based on anatomical considerations. These findings, albeit from a limited sample size, underscore the need for additional studies to derive human injury tolerance and criteria in oblique side impacts.

Author List

Yoganandan N, Humm JR, Pintar FA, Brasel KH, Rudd RW, Ridella SA

Authors

Frank A. Pintar PhD Chair, Professor in the Biomedical Engineering department at Medical College of Wisconsin
Narayan Yoganandan PhD Professor in the Neurosurgery department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Abdomen
Abdominal Injuries
Accidents, Traffic
Biomechanical Phenomena
Cadaver
Fractures, Bone
Humans
Soft Tissue Injuries
Thoracic Injuries
Thorax
Wounds, Nonpenetrating