Passive Arterial Mechanics
Passive Arterial Mechanics - Related Videos
10:32
Mechanical Testing of Mouse Carotid Arteries: from Newborn to Adult
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Cited by 31 •
2012
Passive mechanical testing of mouse carotid arteries is described, with special consideration for adapting to different specimen ages. The procedures include determining the in vivo length of the artery, mounting it in a pressure myograph, recording data, measuring the unloaded dimensions and analyzing the resulting data.
01:23
Drug Absorption Mechanism: Passive Membrane Transport
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2023
Passive transport is a method of drug absorption where small, lipid-soluble drugs can move across the cell membrane. This movement happens along the concentration gradient, which is a natural flow from higher to lower concentration areas. The speed at which the drug moves is directly related to its lipid–water partition coefficient. This means that the more a drug dissolves in lipids, the faster it diffuses or spreads throughout the body. It is important to note that most drugs are either weak...
10:28
Evaluation of Vascular Control Mechanisms Utilizing Video Microscopy of Isolated Resistance Arteries of Rats
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2017
This manuscript describes in vitro video microscopy protocols for evaluating vascular function in rat cerebral resistance arteries. The manuscript also describes techniques for evaluating microvessel density with fluorescently labeled lectin and tissue perfusion using Laser Doppler Flowmetry.
10:34
Characterization and Application of Passive Samplers for Monitoring of Pesticides in Water
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Cited by 6 •
2016
A protocol about the characterization and application of five different passive sampling devices is presented.
01:27
Passive Filters
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2024
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources. Low-Pass Filters Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff frequency...
FAQs
Passive arterial stiffness is pressure dependent because the wall response is nonlinear. As blood pressure changes, the arterial wall experiences different circumferential loading, while elastin, collagen, and other extracellular-matrix components determine how much the vessel deforms. Accounting for this changing stiffness helps bioengineers represent compliance and pressure-dependent behavior more realistically in constitutive models.
Circumferential and axial stresses represent different directions of loading within the arterial wall. Blood pressure produces both, so evaluating only one direction can give an incomplete picture of vessel behavior. Considering their combined effects helps connect wall structure with pressure-induced deformation and supports mechanical descriptions that better reflect how arteries bear loads.
Excluding vascular smooth muscle activity isolates the mechanical contribution of the arterial wall and its extracellular matrix. This separation allows researchers to examine how elastin, collagen, and related structural components determine stiffness, compliance, and deformation without incorporating active muscular effects. The resulting information provides a clearer foundation for passive constitutive modeling and structural analysis.
Pressure-diameter measurements relate changes in blood pressure to changes in vessel diameter. This relationship provides experimental information about pressure-dependent deformation and compliance under passive conditions. Bioengineers can use the measured behavior to evaluate how the artery responds to loading and to inform constitutive models that describe the mechanical response of the vessel wall.
Mechanical testing provides another way to characterize the load-bearing behavior of arterial tissue, complementing pressure-diameter measurements. Together, these approaches help describe how the wall deforms and bears stress under passive conditions. Their results can support constitutive modeling, which translates observed mechanical behavior into representations suitable for bioengineering analysis and computational prediction.
Passive arterial mechanics supports vascular graft design by providing mechanical information that can guide representations of vessel-wall behavior. It also helps researchers interpret arterial remodeling and disease, where altered structure may change stiffness, compliance, or deformation. In computational models, these properties help predict responses to altered blood flow or pressure and assess their mechanical consequences.