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A novel sideways fall simulator to study hip fractures ex vivo

Falls to the side are the leading cause of hip fractures in the elderly. The load that a person experiences during a fall cannot be measured with volunteers for ethical reasons. To evaluate injurious loads, while considering relevant energy input and body posture for a sideways fall, a subject-speci...

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Autores principales: Fleps, Ingmar, Vuille, Muriel, Melnyk, Angela, Ferguson, Stephen J., Guy, Pierre, Helgason, Benedikt, Cripton, Peter A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6057661/
https://www.ncbi.nlm.nih.gov/pubmed/30040858
http://dx.doi.org/10.1371/journal.pone.0201096
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author Fleps, Ingmar
Vuille, Muriel
Melnyk, Angela
Ferguson, Stephen J.
Guy, Pierre
Helgason, Benedikt
Cripton, Peter A.
author_facet Fleps, Ingmar
Vuille, Muriel
Melnyk, Angela
Ferguson, Stephen J.
Guy, Pierre
Helgason, Benedikt
Cripton, Peter A.
author_sort Fleps, Ingmar
collection PubMed
description Falls to the side are the leading cause of hip fractures in the elderly. The load that a person experiences during a fall cannot be measured with volunteers for ethical reasons. To evaluate injurious loads, while considering relevant energy input and body posture for a sideways fall, a subject-specific cadaveric impact experiment was developed. Full cadaveric femur-pelvis constructs (N = 2) were embedded in surrogate soft tissue material and attached to metallic surrogate lower limbs. The specimens were then subjected to an inverted pendulum motion, simulating a fall to the side with an impact to the greater trochanter. The load at the ground and the deformation of the pelvis were evaluated using a 6-axis force transducer and two high-speed cameras. Post-test, a trauma surgeon (PG) evaluated specimen injuries. Peak ground contact forces were 7132 N and 5641 N for the fractured and non-fractured specimen, respectively. We observed a cervical fracture of the femur in one specimen and no injuries in a second specimen, showing that the developed protocol can be used to differentiate between specimens at high and low fracture risk.
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spelling pubmed-60576612018-08-06 A novel sideways fall simulator to study hip fractures ex vivo Fleps, Ingmar Vuille, Muriel Melnyk, Angela Ferguson, Stephen J. Guy, Pierre Helgason, Benedikt Cripton, Peter A. PLoS One Research Article Falls to the side are the leading cause of hip fractures in the elderly. The load that a person experiences during a fall cannot be measured with volunteers for ethical reasons. To evaluate injurious loads, while considering relevant energy input and body posture for a sideways fall, a subject-specific cadaveric impact experiment was developed. Full cadaveric femur-pelvis constructs (N = 2) were embedded in surrogate soft tissue material and attached to metallic surrogate lower limbs. The specimens were then subjected to an inverted pendulum motion, simulating a fall to the side with an impact to the greater trochanter. The load at the ground and the deformation of the pelvis were evaluated using a 6-axis force transducer and two high-speed cameras. Post-test, a trauma surgeon (PG) evaluated specimen injuries. Peak ground contact forces were 7132 N and 5641 N for the fractured and non-fractured specimen, respectively. We observed a cervical fracture of the femur in one specimen and no injuries in a second specimen, showing that the developed protocol can be used to differentiate between specimens at high and low fracture risk. Public Library of Science 2018-07-24 /pmc/articles/PMC6057661/ /pubmed/30040858 http://dx.doi.org/10.1371/journal.pone.0201096 Text en © 2018 Fleps et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Fleps, Ingmar
Vuille, Muriel
Melnyk, Angela
Ferguson, Stephen J.
Guy, Pierre
Helgason, Benedikt
Cripton, Peter A.
A novel sideways fall simulator to study hip fractures ex vivo
title A novel sideways fall simulator to study hip fractures ex vivo
title_full A novel sideways fall simulator to study hip fractures ex vivo
title_fullStr A novel sideways fall simulator to study hip fractures ex vivo
title_full_unstemmed A novel sideways fall simulator to study hip fractures ex vivo
title_short A novel sideways fall simulator to study hip fractures ex vivo
title_sort novel sideways fall simulator to study hip fractures ex vivo
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6057661/
https://www.ncbi.nlm.nih.gov/pubmed/30040858
http://dx.doi.org/10.1371/journal.pone.0201096
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