Global Ischemia Simulation
Global Ischemia Simulation - Related Videos
09:29
2-Vessel Occlusion/Hypotension: A Rat Model of Global Brain Ischemia
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Cited by 35 •
2013
Bilateral carotid occlusion coupled with systemic hypotension produces global brain ischemia in the rat, resulting in damage to the hippocampus with reproducible severity. Animal subjects are impaired with predictable patterns of brain damage, they recover expediently, and mortality rates are comparatively low.
09:15
Stem Cell Transplantation in an in vitro Simulated Ischemia/Reperfusion Model
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Cited by 3 •
2011
We demonstrate how to set up an in vitro ischemia/reperfusion model and how to evaluate the effect of stem cell therapy on postischemic cardiac cells.
08:45
Study of Siphon Breaker Experiment and Simulation for a Research Reactor
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Cited by 2 •
2017
The siphon breaking phenomenon was investigated experimentally and a theoretical model was proposed. A simulation program based on the theoretical model was developed and the results of the simulation program were compared with experimental results. It was concluded that the results of the simulation program matched the experimental results well.
01:50
Global Climate Change
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2019
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past. Past Periods of Warming and Cooling In the last...
10:07
Organ Ischemia-Reperfusion Injury by Simulating Hemodynamic Changes in Rat Liver Transplant Model
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Cited by 1 •
2021
This paper provides a detailed description of how to build an animal model of the anhepatic phase (liver ischemia) in rats to facilitate basic research into ischemia-reperfusion injury after liver transplantation.
FAQs
During the ischemic interval, reduced perfusion limits delivery of oxygen and nutrients across the modeled organ or system. Cells therefore experience metabolic stress and tissue injury, while the controlled design allows investigators to relate those changes to the duration and severity of circulatory interruption. This makes the model useful for separating injury that develops during ischemia from later recovery responses.
Reperfusion is examined because restoring circulation does not simply end the experiment; it creates a recovery phase in which inflammatory and metabolic responses can be followed. Comparing tissue condition before and after circulation returns helps investigators evaluate both the damage associated with oxygen deprivation and the extent of recovery. This is especially relevant to interventions intended to protect tissue during and after ischemia.
Experimental outcomes depend on how perfusion is reduced or interrupted, how long the ischemic period lasts, and whether reperfusion follows. These conditions determine the exposure to oxygen and nutrient deprivation and establish the window for observing injury, inflammation, metabolic changes, or recovery. Defining them consistently is therefore important when comparing protective strategies or therapeutic interventions.
It can reveal tissue damage alongside inflammatory and metabolic responses, then show whether those changes persist or improve during recovery after reperfusion. These readouts connect the initial circulatory interruption with later tissue condition. In medicine, that relationship helps researchers judge whether an intervention changes injury, supports recovery, or influences clinically relevant outcomes.
A typical design establishes a controlled period of interrupted or diminished perfusion, maintains that ischemic condition for a defined interval, and then restores circulation when reperfusion is part of the protocol. Investigators subsequently examine tissue injury, inflammatory and metabolic responses, and recovery. Keeping the sequence defined supports comparisons among different protective strategies and therapeutic interventions.
These simulations can be structured to represent ischemic conditions associated with cardiac arrest, severe hypotension, or surgical circulatory interruption. Their value lies in reproducing the broad loss of blood supply and oxygen delivery in a controlled setting, allowing investigators to study injury and recovery in relation to clinically important events.
Researchers use it when they need to evaluate whether a protective strategy or therapeutic intervention changes the course of ischemic injury and subsequent recovery. The defined ischemic period provides a controlled challenge, while the reperfusion phase, when included, allows assessment of responses after circulation returns. Results can therefore inform investigation of clinically relevant outcomes.
Medicine uses this approach to connect experimental control with events that cause widespread oxygen and nutrient deprivation. By examining tissue damage, inflammatory and metabolic responses, and recovery, researchers can investigate mechanisms that matter after cardiac arrest, severe hypotension, or surgical interruption of circulation. The resulting evidence supports evaluation of strategies aimed at limiting injury and improving outcomes.