b5346352005ade94203e08bb97f10fc5 pmc_34677218.pdf f6bb460190e3851bd5ae08254ef6350d3255a4cc pmc_34677218.pdf eba3d32ebd4dfb54c53093d4141bf558cc46804e0ce2d959cd75e9f87b0115a7 pmc_34677218.pdf Title: Viscoelastic Characterization of Parasagittal Bridging Veins and Implications for Traumatic Brain Injury: A Pilot Study Subject: Many previous studies on the mechanical properties of Parasagittal Bridging Veins (PSBVs) found that strain rate had a significant effect on some mechanical properties, but did not extensively study the viscoelastic effects, which are difficult to detect with uniaxial simple tensile tests. In this study, relaxation tests and tests under cyclic loading were performed, and it was found that PSBVs do indeed exhibit clear viscoelastic effects. In addition, a complete viscoelastic model for the PSBVs is proposed and data from relaxation, cyclic load and load-unload tests for triangular loads are used to find reference values that characterize the viscoelastic behavior of the PSBVs. Although such models have been proposed for other types of blood vessels, this is the first study that clearly demonstrates the existence of viscoelastic effects from an experimental point of view and also proposes a specific model to explain the data obtained. Finally, this study provides reference values for the usual viscoelastic properties, which would allow more accurate numerical simulation of PSBVs by means of computational models. Keywords: bridging veins; TBI; tissue characterization; biomechanics; strain rate dependent materials; viscoelasticity Author: David Sánchez-Molina, Silvia García-Vilana, Jordi Llumà, Ignasi Galtés, Juan Velázquez-Ameijide and Carlos Arregui-Dalmases Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Tue Oct 19 13:23:26 2021 CEST ModDate: Tue Oct 19 13:28:43 2021 CEST Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 15 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 674180 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- XTDDSL+URWPalladioL-Ital Type 1 Custom yes yes no 10 0 WRFHXF+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 FTCGNU+URWPalladioL-Roma Type 1 Custom yes yes no 19 0 QSBYVU+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 27 0 MCBCCI+SourceSansRoman-Regular Type 1C Custom yes yes no 49 0 MCBCCM+SourceSansRoman.613wght Type 1C Custom yes yes no 53 0 MCBCCO+SourceSansRoman-Bold Type 1C Custom yes yes no 57 0 EFCTFU+CMSY10 Type 1 Builtin yes yes no 69 0 JCSTXK+PazoMath-Italic Type 1 Builtin yes yes no 73 0 VYWQUQ+CMEX10 Type 1 Builtin yes yes no 81 0 VUABVQ+CMMI10 Type 1 Builtin yes yes no 85 0 IKFOXA+URWPalladioL-BoldItal Type 1 Custom yes yes no 89 0 SOSTRQ+CMR10 Type 1 Builtin yes yes no 93 0 LAXATE+PazoMath-BoldItalic Type 1 Builtin yes yes no 97 0 CWUMOE+PazoMath Type 1 Builtin yes yes no 108 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2024-10-02 03:38:46 CEST RepresentationInformation: pmc_34677218.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2023-03-31 12:05:53 CEST Size: 674180 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 355 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Data and Methods Destination: section.2 Children: Item: Title: Material and Specimen Preparation Destination: subsection.2.1 Item: Title: Cyclic and Relaxation Tests Destination: subsection.2.2 Item: Title: Quasi-Linear Viscoelastic Model Destination: subsection.2.3 Item: Title: Results Destination: section.3 Children: Item: Title: Relaxation Tests Destination: subsection.3.1 Item: Title: Fast Loading/Unloading Cycle Tests Destination: subsection.3.2 Item: Title: Load-Unload Tests Destination: subsection.3.3 Item: Title: Discussion Destination: section.4 Item: Title: Conclusions Destination: section.5 Item: Title: Prediction of the USF Destination: section.A. Item: Title: References Destination: equation.A..7 Info: Title: Viscoelastic Characterization of Parasagittal Bridging Veins and Implications for Traumatic Brain Injury: A Pilot Study Author: David Sánchez-Molina, Silvia García-Vilana, Jordi Llumà, Ignasi Galtés, Juan Velázquez-Ameijide and Carlos Arregui-Dalmases Subject: Many previous studies on the mechanical properties of Parasagittal Bridging Veins (PSBVs) found that strain rate had a significant effect on some mechanical properties, but did not extensively study the viscoelastic effects, which are difficult to detect with uniaxial simple tensile tests. In this study, relaxation tests and tests under cyclic loading were performed, and it was found that PSBVs do indeed exhibit clear viscoelastic effects. In addition, a complete viscoelastic model for the PSBVs is proposed and data from relaxation, cyclic load and load-unload tests for triangular loads are used to find reference values that characterize the viscoelastic behavior of the PSBVs. Although such models have been proposed for other types of blood vessels, this is the first study that clearly demonstrates the existence of viscoelastic effects from an experimental point of view and also proposes a specific model to explain the data obtained. Finally, this study provides reference values for the usual viscoelastic properties, which would allow more accurate numerical simulation of PSBVs by means of computational models. 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