Vascular Shunt
Vascular Shunt - Related Videos
09:23
Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension
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Cited by 15 •
2017
This protocol describes a surgical procedure to create a model for flow-induced pulmonary arterial hypertension (PAH) in rats and the procedures to analyze the principle hemodynamic and histological end-points in this model.
01:26
Shunt Admittances
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2024
Shunt admittances play a crucial role in the analysis of transmission lines, particularly for three-phase systems with neutral conductors. When a uniformly charged conductor is positioned above the Earth, it induces an equal but opposite charge on its surface. This interaction creates electric field lines between the conductor and the Earth. To model this effect, the method of images is employed. This method involves replacing the Earth with an image conductor that mirrors the original...
08:18
Engineered Vascularized Muscle Flap
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Cited by 6 •
2016
To date, thick tissue defects are typically reconstructed by applying autologous tissue flaps or engineered tissues. In this protocol, we present a new method for engineering vascularized tissue flap bearing an autologous pedicle, to serve as a substitute to autologous flaps.
11:17
Surgical Technique for the Implantation of Tissue Engineered Vascular Grafts and Subsequent In Vivo Monitoring
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Cited by 9 •
2015
A step-by-step protocol for the inter-positional placement of Tissue Engineered Vessels (TEVs) into the carotid artery of a sheep using end-to-end anastomosis and real-time digital assessment in vivo until animal sacrifice.
11:10
Visualization of Vascular and Parenchymal Regeneration after 70% Partial Hepatectomy in Normal Mice
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Cited by 3 •
2016
Tools used for visualizing vascular regeneration require methods for contrasting the vascular trees. This film demonstrated a delicate injection technique used to achieve optimal contrasting of the vascular trees and illustrate the potential benefits resulting from a detailed analysis of the resulting specimen using µCT and histological serial sections.
FAQs
Blood is redirected when pressure differences favor movement through the shunt rather than through the usual capillary route. Changes in vascular resistance, especially at arterioles, alter how readily blood enters each pathway. Smooth-muscle contraction can increase resistance, whereas relaxation can reduce it, allowing the circulation to adjust tissue perfusion and redistribute flow.
Arteriole smooth muscle acts as a variable control point within the circulation. Its contraction or relaxation changes resistance upstream of a vascular bed, influencing whether more blood remains in that bed or is diverted elsewhere. This regulation links local vessel behavior to broader outcomes, including altered tissue perfusion and adjustments associated with thermoregulation.
Ordinary capillary passage exposes blood to a tissue bed, whereas shunted flow bypasses part of that network. The difference changes where exchange and perfusion occur. A shunt therefore provides a mechanism for redirecting circulation between vascular beds, while resistance changes determine how strongly the bypassed route competes with the normal capillary pathway.
Fetal circulation includes specialized pathways that accommodate the developing organs. The ductus arteriosus routes blood around the developing lungs, so circulation can follow a pathway suited to the fetal state rather than relying on normal pulmonary passage. Studying this arrangement illustrates how vascular pathways adapt during development and how circulation is organized before birth.
Researchers can examine how pressure gradients, vascular resistance, and vessel smooth-muscle activity redirect blood between vascular beds. These variables connect the physical behavior of blood flow with vessel development and tissue perfusion. Such analysis supports broader biological research on circulation, hemodynamics, and the formation of specialized or abnormal blood-flow pathways.
Arteriovenous malformations provide a disease-related context for examining abnormal blood-flow pathways. Their study helps connect altered vascular connections with the principles governing pressure and resistance. In biology, this comparison clarifies how deviations from expected circulation can affect perfusion and why shunt mechanisms matter in both normal vascular adaptation and vascular disorders.