2017
DOI: 10.1007/s10439-017-1833-5
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Failure and Fatigue Properties of Immature Human and Porcine Parasagittal Bridging Veins

Abstract: Tearing of the parasagittal bridging veins (BVs) is thought to be a source of extra-axial hemorrhage (EAH) associated with abusive traumatic brain injuries (TBIs) in children. However, the pediatric BV mechanical properties are unknown. We subjected porcine adult, porcine newborn, and human infant BVs to either a low rate pull to failure, a high rate pull to failure, or 30 seconds of cyclic loading followed by a pull to failure. An additional subset of human infant BVs was examined for viscoelastic recovery be… Show more

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Cited by 13 publications
(31 citation statements)
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“…For the samples tested with 1 Hz frequency (Figure 9B), the residual strain increased by about 8% comparing to the 1.5 Hz frequency which increased by about 20%. This indicates the frequency dependent behavior of the tissue (Pasquesi and Margulies, 2017). Similarly, the variation in tangent modulus (Figure 10) increased with the cycle number, indicating alteration of the mechanical properties due to repeated cyclic loading.…”
Section: Stress-relaxation and Cyclic Testsmentioning
confidence: 81%
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“…For the samples tested with 1 Hz frequency (Figure 9B), the residual strain increased by about 8% comparing to the 1.5 Hz frequency which increased by about 20%. This indicates the frequency dependent behavior of the tissue (Pasquesi and Margulies, 2017). Similarly, the variation in tangent modulus (Figure 10) increased with the cycle number, indicating alteration of the mechanical properties due to repeated cyclic loading.…”
Section: Stress-relaxation and Cyclic Testsmentioning
confidence: 81%
“…Therefore, understanding the mechanical response of the plaque tissue using stress-relaxation and cyclic stretching is beneficial in designing disease treatment and management procedures. However, investigations that characterize the mechanical behavior of carotid plaques under cyclic loading conditions and the viscoelastic properties remains relatively unexplored, except a few studies on arterial elastin, porcine veins and arteries, abdominal aortic aneurysm, ligaments, muscle and skin tissues (Fung, 1967;Salunke et al, 2001;Toms et al, 2002;Sarver et al, 2003;Gasser et al, 2008;Heiland et al, 2013;Pasquesi et al, 2016, Pasquesi andMargulies, 2017;Remache et al, 2018;Wang et al, 2018;Yoo et al, 2009;Zou and Zhang, 2011).…”
Section: Introductionmentioning
confidence: 99%
“…When high rate bridging vein properties were implemented with this optimized general connector stiffness, very little difference in slope between finite element and experimental displacements was observed (Table 4 ), suggesting that in comparison with other structures in the PAC, the bridging veins may not contribute much mechanical resistance to translation between the brain and skull. Of note, no bridging vein stretch exceeded the average ultimate stretch ratio of newborn porcine bridging veins (Pasquesi and Margulies, 2017 ).…”
Section: Resultsmentioning
confidence: 99%
“…Thus, the primary loading modality when stretched between their attachment points is assumed to be longitudinal tension. Therefore, bridging veins were represented by two-dimensional non-linear axial connector elements, with force–displacement curves prescribed according to averaged post-cyclic porcine newborn stress–stretch curves obtained in a previous study (Pasquesi and Margulies, 2017 ), and no load upon compression. Briefly, newborn porcine parasagittal bridging veins were subjected to one of three protocols: elongation to failure at a high stretch rate, elongation to failure at a low stretch rate, or cyclic loading followed by elongation to failure at a rate similar to, but higher than the low rate tests.…”
Section: Methodsmentioning
confidence: 99%
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