Material Properties for Modeling Traumatic Aortic Rupture

Bass, Cameron R.; Darvish, Kurosh; Bush, Bryan; Crandall, Jeffrey Richard; Srinivasan, Sreebala C. M.; Tribble, Curtis G.; Fiser, Steven M.; Tourret, Lisa J.; Evans, Jay; Patrie, Jim; Wang, C.

doi:10.4271/2001-22-0006

Cited by 19 publications

(22 citation statements)

References 16 publications

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“…Despite the lack of aortic injury in the cadaver tests presented here, internal pressure measurements exceeded the expected burst pressure of the aorta (approximately 101 kPa, Bass et al, 2001) in many cases. The pressureinduced stress in the aortic wall depends on the difference between the pressure inside the aorta and the pressure in ARTICLE IN PRESS Fig.…”

Section: Article In Pressmentioning

confidence: 70%

“…During half of these tests, the intra-aortic fluid pressure exceeded the expected injury tolerance (Bass et al, 2001), but the differential pressure across the aortic wall may not have exceeded the injury tolerance (in most cases) due to simultaneous increases in extra-aortic pressure. The determination of the true tolerance of the aorta to thoracic acceleration requires further investigation at higher accelerations, however the accelerations imposed here were not sufficient to cause aortic injury in the cadavers tested.…”

Section: Discussionmentioning

confidence: 98%

“…intraaortic pressure- Bass et al, 2001; distraction of the arch- Hardy et al, 2006;chest compression-Kroell and Schneider, 1974;Nusholtz et al, 1985;Viano et al, 1978;Voigt and Wilfert, 1969). Although none of those studies prove that their respective injury mechanisms are the cause of aortic injury in the field, they do show that those mechanisms can cause aortic injury in the absence of other factors.…”

Section: Article In Pressmentioning

confidence: 93%

“…3. Maximum pressures measured inside the aorta, trachea, and esophagus compared to the aortic pressure corresponding to a 50% risk of injury as reported by Bass et al (2001). The ''differential'' pressure is the maximum difference between the intra-aortic and tracheal pressures.…”

Section: Article In Pressmentioning

confidence: 99%

See 3 more Smart Citations

Posterior acceleration as a mechanism of blunt traumatic injury of the aorta

Forman

Stacey

Evans

et al. 2008

Journal of Biomechanics

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Section: Article In Pressmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 98%

Section: Article In Pressmentioning

confidence: 93%

Section: Article In Pressmentioning

confidence: 99%

See 2 more Smart Citations

Posterior acceleration as a mechanism of blunt traumatic injury of the aorta

Forman

Stacey

Evans

et al. 2008

Journal of Biomechanics

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“…The peak pressure recorded in the thoracic aorta was 79.3 6 16.0 kPa (595 6 120 mmHg), while the peak pressure measured in the aortic arch was 58. 8 Table 2). …”

Section: Resultsmentioning

confidence: 94%

Pressure waves in the aorta during isolated abdominal belt loading: the magnitude, phasing, and attenuation

Arregui‐Dalmases

Pozo

Stacey

et al. 2011

Proc Inst Mech Eng H

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While rupture of the aorta is a leading cause of sudden death following motor vehicle crashes, the specific mechanism that causes this injury is not currently well understood. Aortic ruptures occurring in the field are likely due to a complex combination of contributing factors such as acceleration, compression of the chest, and increased pressure within the aorta. The objective of the current study was to investigate one of these factors in more detail than has been done previously; specifically, to investigate the in situ intra-aortic pressure generated during isolated belt loading to the abdomen. Ten juvenile swine were subjected to dynamic belt loads applied to the abdomen. Intraaortic pressure was measured at multiple locations to assess the magnitude and propagation of the resulting blood pressure wave. The greatest average peak pressure (113.6 +/- 43.5 kPa) was measured in the abdominal aorta. Pressures measured in the thoracic aorta and aortic arch were 70 per cent and 50 per cent, respectively, that measured in the abdominal aorta. No macroscopic aortic trauma was observed. To the authors' knowledge the present study is the first one to document the presence, propagation, and attenuation of a transient pressure wave in the aorta generated by abdominal belt loading. The superiorly moving wave is sufficient to generate hydrostatic and intimal shear stress in the aorta, possibly contributing to the hypothesized mechanisms of traumatic aortic rupture.

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Multilayer material properties of aorta determined from nanoindentation tests

Hemmasizadeh

Autieri

Darvish

2012

Journal of the Mechanical Behavior of Biomedical Materials

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In a wide range of biomechanical modeling of aorta from traumatic injury to stent grafts, the arterial wall has been considered as a single homogeneous layer vessel, ignoring the fact that arteries are composed of distinct anatomical layers with different mechanical characteristics. In this study, using a custom-made nanoindentation technique, changes in the mechanical properties of porcine thoracic aorta wall in the radial direction were characterized using a quasi-linear viscoelastic model. Two layers of equal thickness were mechanically distinguishable in descending aorta based on the radial variations in the instantaneous Young's modulus E and reduced relaxation function G(t). Overall, comparison of E and G∞ of the outer half (70.27 ± 2.47 kPa and 0.35 ± 0.01) versus the inner half (60.32 ± 1.65 kPa and 0.33 ± 0.01) revealed that the outer half was stiffer and showed less relaxation. The results were used to explain local mechanisms of deformation, force transmission, tear propagation and failure in arteries.

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Material Properties for Modeling Traumatic Aortic Rupture

Cited by 19 publications

References 16 publications

Posterior acceleration as a mechanism of blunt traumatic injury of the aorta

Posterior acceleration as a mechanism of blunt traumatic injury of the aorta

Pressure waves in the aorta during isolated abdominal belt loading: the magnitude, phasing, and attenuation

Multilayer material properties of aorta determined from nanoindentation tests

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