Numerical Study of the Influence of Blood Viscosity on Aortic Blood Flow with Left Ventricular Assistance Support Pump

Aurélio Ferreira da Costa; Alexandre Marconi de Souza da Costa

doi:10.5433/1679-0375.2025.v46.52272

Estudo Numérico da Influência da Viscosidade do Sangue no Fluxo Sanguíneo Aórtico com Bomba suporte de Assistência Ventricular Esquerda

Autores

Aurélio Ferreira da Costa Universidade Estadual de Maringá https://orcid.org/0009-0008-0951-2068
Alexandre Marconi de Souza da Costa Universidade Estadual de Maringá https://orcid.org/0000-0002-7844-3827

DOI:

https://doi.org/10.5433/1679-0375.2025.v46.52272

Palavras-chave:

estudo numérico, dispositivo de assistência ventricular esquerda, fluidodinâmica computacional, viscosidade

Resumo

A insuficiência cardíaca (IC) é uma doença que leva milhares de pessoas à morte todos os anos. Ela pode ser caracterizada como incapacidade do coração de suprir sangue satisfatoriamente na circulação sistêmica. Nesta situação, o implante de uma bomba destinada ao dispositivo de assistência ventricular esquerda (LVAD), auxilia o coração com IC, a restabelecer o fluxo sanguíneo. No entanto, o implante da bomba pode trazer consequências como aumento do risco de derrames, formação de trombos e escoamento reverso através da válvula aórtica. O objetivo do presente trabalho é investigar numericamente por meio da fluidodinâmica computacional um trecho da artéria aorta acoplada a um suporte de bomba LVAD. Buscando identificar a influência do aumento da velocidade da bomba LVAD e das particularidades do sangue nas variáveis â€‹â€‹hemodinâmicas que podem influenciar nos efeitos colaterais do suporte mecânico. Utilizando seis modelos específicos e cinco vazões diferentes da bomba LVAD, foram utilizados dados reais de um paciente implantado com suporte LVAD. Diversas simulações foram realizadas para comparar os resultados das variáveis â€‹â€‹hemodinâmicas entre diferentes modelos de particularidades. Em seguida, foram analisados â€‹â€‹os resultados para as diversas vazões da bomba LVAD. Essas análises permitiram identificar os possíveis pontos críticos na geometria, associados aos efeitos colaterais para cada variável hemodinâmica.

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Biografia do Autor

Aurélio Ferreira da Costa, Universidade Estadual de Maringá

Mestre em Ciências, Departamento de Engenharia Mecânica, Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brasil.

Alexandre Marconi de Souza da Costa, Universidade Estadual de Maringá

Professor Doutor, Departamento de Engenharia Mecânica, Universidade Estadual de Maringá, Maringá (UEM), Paraná, Brasil.

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