- Title
- Investigating the hemodynamic implications of triangular cross-sectioned superior sagittal sinus vessels and the errors associated with idealised modelling
- Creator
- Bateman, Alexander Robert; Bateman, Grant Alexander; Barber, Tracie
- Relation
- Journal of Biomechanics Vol. 149, Issue March 2023, no. 111507
- Publisher Link
- http://dx.doi.org/10.1016/j.jbiomech.2023.111507
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2023
- Description
- The superior sagittal sinus (SSS) is a blood vessel that is often observed to be approximately triangular in cross-section, due to how the venous wall attaches to the surrounding tissue. Despite this, the vessel has been assumed to be circular, when models are generated without patient-specific data. In this study, the differences between the cerebral hemodynamics of one circular, three triangular and five patient-specific cross-sectional models of a SSS were conducted. The errors associated with using circular cross-sectioned flow extensions were also determined. Computational fluid dynamics (CFD) models were generated from these geometries, with a population mean transient blood flow profile incorporated. The maximal helicity of the fluid flow was found to be elevated in the triangular cross-section, compared to the circular, with a higher wall shear stress (WSS) observed over a smaller, more concentrated region on the posterior sinus wall. The errors associated with using a circular cross-section were detailed, with the cross-sectional area appearing to have a greater influence on the hemodynamic parameters than the triangularity or circularity of the cross-section. This highlighted the importance of exhibiting caution when incorporating idealised modelling, especially when commenting on the true hemodynamics of these models. Errors were also found to be induced when using a circular cross-sectioned flow extension, for a geometry which was non-circular. This study highlights the importance of understanding the human anatomy when modelling blood vessels.
- Subject
- computational fluid dynamics; superior sagittal sinus; triangularity; cerebral hemodynamics
- Identifier
- http://hdl.handle.net/1959.13/1491771
- Identifier
- uon:53096
- Identifier
- ISSN:0021-9290
- Rights
- x
- Language
- eng
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