Development of a detailed bridging veins model

Detalhes bibliográficos
Autor(a) principal: Costa, José Miguel Clemente
Data de Publicação: 2019
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/31257
Resumo: Traumatic brain injury is one of the major causes of death and disability in the world. One of the most frequent and deadly injury resulted from a head trauma is acute subdural hematoma (ASDH), which consists on the rupture of a bridging vein (BV). Given the importance of this type of injury, it is necessary to set thresholds and damage criteria. To access this thresholds and damage criteria, experimental tests performed on human cadavers, animals or dummies are required. However due to ethical and economical issues, more and more the finite element (FE) models are becoming a very good cost-effective alternative. Once properly validated, the finite element head model (FEHM) is a valuable tool, that can be used in the development of head protective gear as a design tool and in the reconstruction of head traumas by predicting brain injuries under impact conditions. The YEt Another Head Model (YEAHM) is the example of a FE model that can be used to assist/replace the experimental tests. The YEAHM already has a bridging veins FE model to help on the prediction of ASDH. However, this model presents unrealistic geometry and lacks validation. In this study the bridging veins FE model was improved and validated. The validation consists on the calculation of the model prediction success rate. At the end, it was obtained a 3D bridging veins FE model with tubular shape that takes in consideration the blood pressure. Results showed that this model presents a maximum success rate of 90% and, in comparison with FE models already developed, presents equal or even better prediction results. In summary, it can be stated that the model developed in this work is a big step in eld of bridging veins FE models
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spelling Development of a detailed bridging veins modelBridging veinsSuperior sagittal sinusTraumatic brain injuryAcute subdural hematomaFinite elementsLinear accelerationRotational accelerationTraumatic brain injury is one of the major causes of death and disability in the world. One of the most frequent and deadly injury resulted from a head trauma is acute subdural hematoma (ASDH), which consists on the rupture of a bridging vein (BV). Given the importance of this type of injury, it is necessary to set thresholds and damage criteria. To access this thresholds and damage criteria, experimental tests performed on human cadavers, animals or dummies are required. However due to ethical and economical issues, more and more the finite element (FE) models are becoming a very good cost-effective alternative. Once properly validated, the finite element head model (FEHM) is a valuable tool, that can be used in the development of head protective gear as a design tool and in the reconstruction of head traumas by predicting brain injuries under impact conditions. The YEt Another Head Model (YEAHM) is the example of a FE model that can be used to assist/replace the experimental tests. The YEAHM already has a bridging veins FE model to help on the prediction of ASDH. However, this model presents unrealistic geometry and lacks validation. In this study the bridging veins FE model was improved and validated. The validation consists on the calculation of the model prediction success rate. At the end, it was obtained a 3D bridging veins FE model with tubular shape that takes in consideration the blood pressure. Results showed that this model presents a maximum success rate of 90% and, in comparison with FE models already developed, presents equal or even better prediction results. In summary, it can be stated that the model developed in this work is a big step in eld of bridging veins FE modelsO traumatismo cranioencefálico é uma das maiores causas de morte e incapacidade no mundo. Uma das lesões mais frequentes e com maior taxa de mortalidade, resultante de um traumatismo craniano, é o hematoma subdural agudo. Dada a importância deste tipo de lesões é necessário criar limites e critérios de dano. Para obter estes limites e critérios de dano, é necessário efectuar testes experimentais em cadáveres humanos, animais ou dummies. No entanto, devido a problemas éticos e económicos, cada vez mais os modelos de elementos finitos são uma boa alternativa. Uma vez vali dado, o modelo de elemetos finitos da cabeça é uma mais valia, que pode ser utilizado como ferramenta de design no desenvolvimento de equipamentos para proteção da cabeça e na reconstrução de lesões como o traumatismo craniano. O YEt Another Head Model (YEAHM) é exemplo de um desses modelos que pode ser utilizado para substituir ou auxiliar os testes experimentais. O YEAHM já tem incorporado um modelo de veias meníngeas que ajuda na detecção de hematomas subdurais agudos, no entanto este modelo apresenta geometria irrealista e falhas na validação. No estudo realizado neste trabalho esse modelo foi melhorado e validado. A validação consiste no cálculo da taxa de sucesso que o modelo consegue obter na detecção de rupturas das veias meníngeas. No fim, foi obtido um modelo 3D de elementos finitos das veias meníngeas que tem em consideração a pressão sanguínea. Os resultados mostram que o modelo obteve uma taxa de sucesso máxima de 90%, e em comparação com outros modelos já desenvolvidos consegue resultados iguais ou melhores. Para concluir, é possível afirmar que o modelo desenvolvido neste trabalho é um grande passo nos modelos de elementos finitos das veias meníngeas.2021-04-27T09:59:56Z2019-12-17T00:00:00Z2019-12-17info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/31257engCosta, José Miguel Clementeinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:00:17Zoai:ria.ua.pt:10773/31257Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:03:10.042296Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Development of a detailed bridging veins model
title Development of a detailed bridging veins model
spellingShingle Development of a detailed bridging veins model
Costa, José Miguel Clemente
Bridging veins
Superior sagittal sinus
Traumatic brain injury
Acute subdural hematoma
Finite elements
Linear acceleration
Rotational acceleration
title_short Development of a detailed bridging veins model
title_full Development of a detailed bridging veins model
title_fullStr Development of a detailed bridging veins model
title_full_unstemmed Development of a detailed bridging veins model
title_sort Development of a detailed bridging veins model
author Costa, José Miguel Clemente
author_facet Costa, José Miguel Clemente
author_role author
dc.contributor.author.fl_str_mv Costa, José Miguel Clemente
dc.subject.por.fl_str_mv Bridging veins
Superior sagittal sinus
Traumatic brain injury
Acute subdural hematoma
Finite elements
Linear acceleration
Rotational acceleration
topic Bridging veins
Superior sagittal sinus
Traumatic brain injury
Acute subdural hematoma
Finite elements
Linear acceleration
Rotational acceleration
description Traumatic brain injury is one of the major causes of death and disability in the world. One of the most frequent and deadly injury resulted from a head trauma is acute subdural hematoma (ASDH), which consists on the rupture of a bridging vein (BV). Given the importance of this type of injury, it is necessary to set thresholds and damage criteria. To access this thresholds and damage criteria, experimental tests performed on human cadavers, animals or dummies are required. However due to ethical and economical issues, more and more the finite element (FE) models are becoming a very good cost-effective alternative. Once properly validated, the finite element head model (FEHM) is a valuable tool, that can be used in the development of head protective gear as a design tool and in the reconstruction of head traumas by predicting brain injuries under impact conditions. The YEt Another Head Model (YEAHM) is the example of a FE model that can be used to assist/replace the experimental tests. The YEAHM already has a bridging veins FE model to help on the prediction of ASDH. However, this model presents unrealistic geometry and lacks validation. In this study the bridging veins FE model was improved and validated. The validation consists on the calculation of the model prediction success rate. At the end, it was obtained a 3D bridging veins FE model with tubular shape that takes in consideration the blood pressure. Results showed that this model presents a maximum success rate of 90% and, in comparison with FE models already developed, presents equal or even better prediction results. In summary, it can be stated that the model developed in this work is a big step in eld of bridging veins FE models
publishDate 2019
dc.date.none.fl_str_mv 2019-12-17T00:00:00Z
2019-12-17
2021-04-27T09:59:56Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
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url http://hdl.handle.net/10773/31257
dc.language.iso.fl_str_mv eng
language eng
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dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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