G F J Migueis1, F A O Fernandes1, M Ptak2, M Ratajczak3, R J Alves de Sousa4. 1. TEMA: Center of Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, Portugal. 2. Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Lukasiewicza 7/9, Wroclaw 50-371, Poland. 3. University of Zielona Gora, Faculty of Mechanical Engineering, Prof. Z. Szafrana 4, Zielona Gora 65-516, Poland. 4. TEMA: Center of Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, Portugal. Electronic address: rsousa@ua.pt.
Abstract
BACKGROUND: One of the most severe traumatic brain injuries, the subdural haematoma, is related to damage and rupture of the bridging veins, generating an abnormal collection of blood between the dura mater and arachnoid mater. Current numerical models of these vessels rely on very simple geometries and material laws, limiting its accuracy and bio-fidelity. METHODS: In this work, departing from an existing human head numerical model, a realistic geometry for the bridging veins was developed, devoting special attention to the finite elements type employed. A novel and adequate constitutive model including damage behavior was also successfully implemented. FINDINGS: Results attest that vessel tearing onset was correctly captured, after comparison against experiments on cadavers. INTERPRETATION: Doing so, the model allow to precisely predict the individual influence of kinematic parameters such as the pulse duration, linear and rotational accelerations in promoting vessel tearing.
BACKGROUND: One of the most severe traumatic brain injuries, the subdural haematoma, is related to damage and rupture of the bridging veins, generating an abnormal collection of blood between the dura mater and arachnoid mater. Current numerical models of these vessels rely on very simple geometries and material laws, limiting its accuracy and bio-fidelity. METHODS: In this work, departing from an existing human head numerical model, a realistic geometry for the bridging veins was developed, devoting special attention to the finite elements type employed. A novel and adequate constitutive model including damage behavior was also successfully implemented. FINDINGS: Results attest that vessel tearing onset was correctly captured, after comparison against experiments on cadavers. INTERPRETATION: Doing so, the model allow to precisely predict the individual influence of kinematic parameters such as the pulse duration, linear and rotational accelerations in promoting vessel tearing.
Authors: Silvia García-Vilana; David Sánchez-Molina; Juan Velázquez-Ameijide; Jordi Llumà Journal: Int J Environ Res Public Health Date: 2021-12-17 Impact factor: 3.390