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A methodology to estimate the kinematics of pediatric occupants in frontal impacts
López Valdés, Francisco José; Seacrist, Thomas; Arbogast, Kristy .B.; Balasubramanian, Sriram; Maltese, Matthew R.; Tanji, Hiromasa; Higuchi, Kazuo; Kent, Richard W. (01/05/2012)<p><strong>Objective:</strong></p> The goal of this article is to propose a new methodology to estimate the sagittal plane displacement of the head, spine, and pelvis of a 6-year-old (6YO) occupant during a high-speed ... -
A methodology to obtain kinematic corridors for pediatric occupants in frontal impacts
López Valdés, Francisco José; Seacrist, Thomas; Balasubramanian, Sriram; Maltese, Matthew R.; Arbogast, Kristy .B.; Tanji, Hiromasa; Higuchi, Kazuo; Kent, Richard W. (Biomedical Engineering Society of Singapore; Global Enterprise for Micromechanics and Molecular Medi (Singapur, Singapur), 01/08/2010)Pediatric Anthropomorphic Test Devices (ATD) provide a reasonable approximation predicting maximum head excursion. However, the exact trajectory followed by the human head and the flexible human spine cannot be replicated ... -
A parametric study of hard tissue injury prediction using finite elements: consideration of geometric complexity, sub-failure material properties, CT-thresholding, and element characteristics
Arregui-Dalmases, Carlos; Pozo de Dios, Eduardo del; Duprey, Sonia; López Valdés, Francisco José; Lau, Anthony; Subit, Damien; Kent, Richard W. (Sin editorial (Berna, Suiza), 17/09/2008)This study quantifies the sensitivity of finite element-predicted fracture in the clavicle to several parameters. Clavicles were harvested from 14 donors (age range 14-56 years). Quasistatic axxal compression tests were ... -
A parametric study of hard tissue injury prediction using finite elements: consideration of geometric complexity, subfailure material properties, CT-thresholding and element characteristics
Arregui-Dalmases, Carlos; Pozo de Dios, Eduardo del; Duprey, Sonia; López Valdés, Francisco José; Lau, Anthony; Subit, Damien; Kent, Richard W. (09/06/2010)Objective: The objectives of this study were to examine the axial response of the clavicle under quasistatic compressions replicating the body boundary conditions and to quantify the sensitivity of finite element predicted ... -
Biomechanical response targets for physical and computational models of the pediatric trunk
Kent, Richard W.; López Valdés, Francisco José; Lamp, John; Lau, Sabrina; Parent, Daniel; Kerrigan, Jason; Lessley, David J.; Salzar, Robert; Sochor, Mark; et al., ? (01/09/2012)<p><strong>Objectives:</strong></p> This paper quantifies pediatric thoracoabdominal response to belt loading to guide the scaling of existing adult response data and to assess the validity of a juvenile porcine abdominal ... -
Kinetics of the cervical spine in pediatric and adult volunteers during low speed frontal impacts
Seacrist, Thomas; Arbogast, Kristy .B.; Maltese, Matthew R.; García España, J. Felipe; López Valdés, Francisco José; Kent, Richard W.; Tanji, Hiromasa; Higuchi, Kazuo; Balasubramanian, Sriram (03/01/2012)Previous research has quantified differences in head and spinal kinematics between children and adults restrained in an automotive-like configuration subjected to low speed dynamic loading. The forces and moments that the ... -
Pressure waves in the aorta during isolated abdominal belt loading. The magnitude, phase and attenuation
Arregui-Dalmases, Carlos; Pozo de Dios, Eduardo del; Stacey, S.; Kindig, M.; Lessley, D.J.; López Valdés, Francisco José; Forman, Jason L.; Kent, Richard W. (01/07/2011)While rupture of the aorta is a leading cause of sudden death following motor vehicle crashes, the specific mechanism that causes this injury is not currently well understood. Aortic ruptures occurring in the field are ... -
The frontal-impact response of a booster-seated child-size PMHS
López Valdés, Francisco José; Forman, Jason L.; Ash, Joseph H.; Kindig, Matthew; Lamp, John; Kent, Richard W.; Bohman, Katarina; Bostrom, Ola (Sin editorial (York, Reino Unido), 09/09/2009)This paper presents the response of a child-size Post Mortem Human Subject in a series of frontal impact sled tests. Specific focus is on the whole-body kinematics and resulting head trajectories under two different restraint ... -
The frontal-impact response of a booster-seated child-size PMHS
López Valdés, Francisco José; Forman, Jason L.; Bostrom, Ola; Kent, Richard W. (09/06/2010)<p><strong>Objectives:</strong></p> This article presents the response of a child-size postmortem human subject using a booster seat in a series of three frontal impact sled tests.</p> <p><strong>Methods: </strong></p> A ... -
The magnitude, phasing, and attenuation of pressure waves in the aorta during abdominal belt laoading
Arregui-Dalmases, Carlos; Pozo de Dios, Eduardo del; Kindig, Matthew; López Valdés, Francisco José; Forman, Jason L.; Kent, Richard W. (Sin editorial (York, Reino Unido), 09/09/2009)Rupture of the aorta is a leading cause of death after motor vehicle crashes, but the exact mechanisms of this injury remain unidentified. It is well documented that transient pressure waves develop within the aorta during ... -
The six degrees of freedom motion of the human head, spine, and pelvis in a frontal impact
López Valdés, Francisco José; Riley, Patrick O.; Lessley, David J.; Arbogast, Kristy .B.; Seacrist, Thomas; Balasubramanian, Sriram; Maltese, Matthew R.; Kent, Richard W. (01/04/2014)Objective: The goal of this study is to characterize the in situ 6-degree-of-freedom kinematics of the head, 3 vertebrae (T1, T8, and L2), and the pelvis in a 40 km/h frontal impact. Methods: Three postmortem human ...