Hook Ischemia Model
Hook Ischemia Model - Related Videos
14:05
Generation of Hook Ischemia-Reperfusion Model using a Three-Day Developing Chick Embryo
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Cited by 2 •
2022
This paper describes ischemia-reperfusion (I/R) modeling in a 3-day chick embryo using a spinal needle customized hook to better understand I/R development and treatment. This model is simple, quick, and inexpensive.
12:51
Murine Model of Hindlimb Ischemia
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Cited by 200 •
2009
The surgical procedure for induction of unilateral hindlimb ischemia is demonstrated, with confirmation of ischemia by laser Doppler perfusion imaging.
13:42
A Murine Closed-chest Model of Myocardial Ischemia and Reperfusion
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Cited by 19 •
2012
Surgical trauma induces an inflammatory response. Cytokines and endogenous ligands are known to modulate myocardial infarct size following ischemia and reperfusion. We present a modified closed-chest model of murine ischemia and reperfusion using hanging weights to minimize effects of thoracotomy.
07:52
Hooke's Law and Simple Harmonic Motion
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2023
Source: Ketron Mitchell-Wynne, PhD, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Potential energy is an important concept in physics. Potential energy is the energy associated with forces that depend upon the position of an object relative to its surroundings. Gravitational potential energy, which is discussed in another video, is the energy associated that is directly proportional to the height of an object above...
09:24
An Anoxia-starvation Model for Ischemia/Reperfusion in C. elegans
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Cited by 4 •
2014
A protocol is described that uses anoxia/starvation in C. elegans to model ischemia/reperfusion. Functional outcomes include increased mortality, visible abnormalities in GFP-labeled neuronal processes, and impaired behavioral responses that require neuronal function.
FAQs
The model creates two experimentally distinguishable phases: a period when vessel restriction limits oxygen and nutrient delivery, followed by a period when the obstruction is removed and blood flow returns. Studying these phases separately helps researchers examine which tissue changes arise during inadequate perfusion and which emerge during reperfusion, supporting more precise analysis of ischemia-reperfusion mechanisms.
Mechanical restriction of a selected vessel produces localized ischemia under reproducible conditions. This control allows investigators to focus on a defined tissue region rather than an uncontrolled, widespread loss of blood flow. Consistent restriction also improves comparisons among experiments, including comparisons of tissue injury, recovery, vascular remodeling, and responses to candidate treatments.
The model can reveal several linked responses to vascular stress and recovery, including tissue damage, inflammation, vascular remodeling, and angiogenesis. Examining these outcomes together helps researchers determine whether recovery reflects reduced injury, changes in existing vessels, or formation of new vascular structures. The resulting profile provides a broader view than measuring blood flow alone.
A typical experiment applies a hook-shaped instrument or ligature to a target vessel to restrict flow, maintains the intended ischemic period, and then removes the obstruction to initiate reperfusion. Researchers can subsequently assess tissue injury and recovery-related responses. The localized design and defined sequence make the model suitable for controlled studies of vascular injury.
Candidate treatments can be assessed by examining whether they improve blood flow, limit tissue injury, or promote recovery after vascular restriction and reperfusion. Because the model produces a controlled ischemic challenge, treated and untreated conditions can be compared using outcomes such as inflammation, vascular remodeling, angiogenesis, and overall tissue damage.
In biology, the model connects a mechanical change in vessel patency with downstream tissue responses. It supports investigation of how inadequate perfusion affects living tissue and how recovery develops after flow returns. This makes it relevant to studies of vascular injury, ischemia-reperfusion mechanisms, tissue repair, and interventions intended to restore or preserve tissue function.