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    Collapse of Arteries Subjected to an External Band of Pressure

    Source: Journal of Biomechanical Engineering:;1980:;volume( 102 ):;issue: 001::page 8
    Author:
    A. M. Hecht
    ,
    H. Yeh
    ,
    S. M. K. Chung
    DOI: 10.1115/1.3138203
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Collapse of arteries subjected to a band of hydrostatic pressure of finite length is analyzed. The vessel is treated as a long, thin, linearly elastic, orthotropic cylindrical shell, homogeneous in composition, and with negligible radial stresses. Blood in the vessel is treated as a Newtonian fluid and the Reynolds number is of order 1. Results are obtained for effects of the following factors on arterial collapse: intraluminal pressure, length of the pressure band, elastic properties of the vessel, initial stress both longitudinally and circumferentially, blood flow Reynolds number, compressibility, and wall thickness to radius ratio. It is found that the predominant parameter influencing vessel collapse for the intermediate range of vessel size and blood flow Reynolds numbers studied is the preconstricted intraluminal pressure. For pressure bands less than about 10 vessel radii the collapse pressure increases sharply with increasing intraluminal pressure. Initial axial prestress is found to be highly stabilizing for small band lengths. The effects of fluid flow are found to be small for pressure bands of less than 100 vessel radii. No dramatic orthotropic vessel behavior is apparent. The analysis shows that any reduction in intraluminal pressure, such as that produced by an upstream obstruction, will significantly lower the required collapse pressure. Medical implications of this analysis to Legg-Perthes disease are discussed.
    keyword(s): Pressure , Collapse , Vessels , Reynolds number , Stress , Blood flow , Wall thickness , Biomedicine , Diseases , Hydrostatic pressure , Blood , Pipes , Compressibility , Fluid dynamics , Elasticity AND Fluids ,
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      Collapse of Arteries Subjected to an External Band of Pressure

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    http://yetl.yabesh.ir/yetl1/handle/yetl/93050
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    contributor authorA. M. Hecht
    contributor authorH. Yeh
    contributor authorS. M. K. Chung
    date accessioned2017-05-08T23:08:16Z
    date available2017-05-08T23:08:16Z
    date copyrightFebruary, 1980
    date issued1980
    identifier issn0148-0731
    identifier otherJBENDY-25645#8_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/93050
    description abstractCollapse of arteries subjected to a band of hydrostatic pressure of finite length is analyzed. The vessel is treated as a long, thin, linearly elastic, orthotropic cylindrical shell, homogeneous in composition, and with negligible radial stresses. Blood in the vessel is treated as a Newtonian fluid and the Reynolds number is of order 1. Results are obtained for effects of the following factors on arterial collapse: intraluminal pressure, length of the pressure band, elastic properties of the vessel, initial stress both longitudinally and circumferentially, blood flow Reynolds number, compressibility, and wall thickness to radius ratio. It is found that the predominant parameter influencing vessel collapse for the intermediate range of vessel size and blood flow Reynolds numbers studied is the preconstricted intraluminal pressure. For pressure bands less than about 10 vessel radii the collapse pressure increases sharply with increasing intraluminal pressure. Initial axial prestress is found to be highly stabilizing for small band lengths. The effects of fluid flow are found to be small for pressure bands of less than 100 vessel radii. No dramatic orthotropic vessel behavior is apparent. The analysis shows that any reduction in intraluminal pressure, such as that produced by an upstream obstruction, will significantly lower the required collapse pressure. Medical implications of this analysis to Legg-Perthes disease are discussed.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleCollapse of Arteries Subjected to an External Band of Pressure
    typeJournal Paper
    journal volume102
    journal issue1
    journal titleJournal of Biomechanical Engineering
    identifier doi10.1115/1.3138203
    journal fristpage8
    journal lastpage22
    identifier eissn1528-8951
    keywordsPressure
    keywordsCollapse
    keywordsVessels
    keywordsReynolds number
    keywordsStress
    keywordsBlood flow
    keywordsWall thickness
    keywordsBiomedicine
    keywordsDiseases
    keywordsHydrostatic pressure
    keywordsBlood
    keywordsPipes
    keywordsCompressibility
    keywordsFluid dynamics
    keywordsElasticity AND Fluids
    treeJournal of Biomechanical Engineering:;1980:;volume( 102 ):;issue: 001
    contenttypeFulltext
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