Microvascular Perfusion Resistance
Microvascular Perfusion Resistance - Related Videos
09:23
Isolation of Microvascular Endothelial Tubes from Mouse Resistance Arteries
0 Views •
Cited by 20 •
2013
We present a preparation for visualizing and manipulating calcium signaling in native, intact microvascular endothelium. Endothelial tubes freshly isolated from mouse resistance arteries supplying skeletal muscle retain in vivo morphology and dynamic signaling within and between neighboring cells. Endothelial tubes can be prepared from microvessels of other tissues and organs.
05:30
Ex vivo Lung Perfusion: A Technique for Pulmonary Research in a Rabbit Model
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2025
This video shows an ex vivo technique for isolated lung perfusion. It is a tool for pulmonary research that will aid studies of various physiological and pathological mechanisms involved in lung transplantation procedures.
10:39
Laser Doppler: A Tool for Measuring Pancreatic Islet Microvascular Vasomotion In Vivo
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Cited by 7 •
2018
Pancreatic islet microvascular vasomotion regulates islet blood distribution and maintains the physiological function of islet β cells. This protocol describes using a laser Doppler monitor to determine the functional status of pancreatic islet microvascular vasomotion in vivo and to assess the contributions of pancreatic islet microcirculation to pancreatic-related diseases.
11:08
Endothelialized Microfluidics for Studying Microvascular Interactions in Hematologic Diseases
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Cited by 52 •
2012
A method to culture an endothelial cell monolayer throughout the entire inner 3D surface of a microfluidic device with microvascular-sized channels (<30 μm) is described. This in vitro microvasculature model enables the study of biophysical interactions between blood cells, endothelial cells, and soluble factors in hematologic diseases.
05:41
Non-invasive Assessment of Microvascular and Endothelial Function
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Cited by 12 •
2013
Capillaroscopy is a non-invasive, relatively inexpensive methodology for directly visualizing the microcirculation. The forearm blood flow technique provides accepted non-invasive measures of endothelial function.
FAQs
Vessel radius has a disproportionately large effect on microvascular perfusion resistance: even small changes in the caliber of a small vessel can produce substantial changes in opposition to flow. This relationship makes arteriolar smooth muscle especially important, because contraction or relaxation can rapidly redirect local perfusion and alter delivery to nearby tissue.
Blood properties and surrounding tissue conditions also shape resistance. Blood viscosity affects how readily blood moves, while red blood cell deformability influences passage through the microvascular network. Tissue pressure can further oppose flow from outside the vessels. Considering these variables together helps explain why similar vascular geometry may produce different perfusion levels.
Endothelial signals provide a mechanism for adjusting microvascular flow without changing the vessel network itself. By influencing arteriolar smooth muscle, these signals can modify vessel caliber and therefore resistance. This regulation links local vascular biology to tissue demand, making perfusion a dynamic outcome rather than a fixed consequence of vessel structure.
Researchers measure and model microvascular perfusion resistance to relate flow behavior to vascular geometry, blood viscosity, red blood cell deformability, and tissue pressure. These approaches help examine how changes in small-vessel conditions affect oxygen and nutrient delivery, blood-pressure regulation, and exchange between blood and cells, even when direct observation of every vessel is not possible.
Changes in resistance can be interpreted alongside perfusion to investigate whether oxygen and nutrients are reaching tissues effectively. Because the concept connects flow through small vessels with exchange between blood and cells, it provides a framework for studying local tissue oxygenation and for explaining how microvascular changes may influence broader blood-pressure regulation.
These conditions provide important settings for investigating impaired microvascular function. Studying resistance in relation to perfusion and tissue oxygenation can help researchers connect small-vessel changes with functional consequences in affected tissues. The same framework also supports evaluation of therapies designed to restore microvascular function, making it relevant to both disease research and therapeutic development.