Retinal Hemodynamics
Retinal Hemodynamics - Related Videos
08:09
A Novel Ex Ovo Banding Technique to Alter Intracardiac Hemodynamics in an Embryonic Chicken System
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Cited by 2 •
2016
For the first time we present here a reproducible banding procedure to alter hemodynamics in the developing heart ex ovo. This is achieved by partially constricting the outflow tract (OFT).
06:38
Early Detection of Drug-Induced Renal Hemodynamic Dysfunction Using Sonographic Technology in Rats
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Cited by 14 •
2016
Early stage hemodynamic dysfunction is critical to the development of kidney disease. Yet, detection methodologies are limited. Recent advances in sonography provide a noninvasive, accurate option for early detection of kidney injury. This study outlines a step-by-step, sonographic methodology for detecting kidney dysfunction using a drug-induced nephrotoxicity rat model.
02:54
Preparation of Mouse Retinal Cryosections to Assess Retinal Permeability to Adeno-Associated Virus
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2026
Source: Vacca, O., et al. Using Adeno-associated Virus as a Tool to Study Retinal Barriers in Disease. J. Vis. Exp. (2015)This video demonstrates the step-by-step procedure for preparing mouse retinal cryosections to visualize adeno-associated virus permeability across disrupted retinal barriers.
08:55
COVID-19 / Coronavirus Outbreak: Hemodynamic monitoring with PiCCO artery
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2020
During pandemics, medical staff become a key resource in treating and managing patients with these infectious diseases. To achieve the best medical care, relevant techniques and procedures must be taught to medical staff which minimize the risk of work-related transmission of infection. When carrying out hemodynamic monitoring in cardiovascularly unstable patients, it is possible to utilize a Pulse Contour Cardiac Output (PiCCO) catheter. This system utilizes a thermodilution method to analyze...
09:17
Using Retinal Imaging to Study Dementia
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Cited by 19 •
2017
The retina shares prominent similarities with the brain and thus represents a unique window to study vasculature and neuronal structure in the brain non-invasively. This protocol describes a method to study dementia using retinal imaging techniques. This method can potentially aid in diagnosis and risk assessment of dementia.
FAQs
Vascular resistance acts as a controllable constraint on blood movement through the retinal and choroidal networks. By changing resistance, these vessels can adjust perfusion when blood pressure or tissue demand changes, helping circulation remain responsive to the eye’s high metabolic requirements. This regulatory behavior is important when interpreting whether altered flow reflects vascular adaptation or impaired circulation.
Blood pressure, oxygen availability, carbon dioxide, and neural activity are key influences on retinal hemodynamics. Changes in these conditions can trigger autoregulatory responses that modify vascular resistance and perfusion. Studying the vessels under changing physiological conditions helps connect circulation with tissue demand and may reveal how disrupted regulation contributes to vascular abnormalities.
Neural activity is relevant because it can alter the circulation required by metabolically active retinal tissue. The vascular response therefore reflects more than pressure alone; it also relates to local functional demand. This relationship gives researchers a way to examine how neural signaling and microvascular regulation interact when assessing retinal function and vascular health.
Doppler imaging and optical coherence tomography angiography provide complementary ways to assess retinal circulation. These techniques can help researchers evaluate features such as blood flow and vessel density, while related measurements can inform assessment of tissue oxygenation. Their findings support comparisons of vascular status across conditions and help characterize changes in ocular microcirculation.
Researchers evaluate retinal hemodynamics by measuring vascular features and flow-related behavior with imaging methods such as Doppler imaging and optical coherence tomography angiography. The resulting information can include vessel density, blood flow, and indications of tissue oxygenation. These measurements allow investigators to examine circulation in relation to physiological regulation, disease state, or treatment response.
Retinal hemodynamics provides vascular information relevant to diabetic retinopathy, glaucoma, age-related macular degeneration, and systemic vascular disease. Measuring circulation can help researchers examine disease progression and evaluate responses to treatment. Because retinal and choroidal networks support demanding tissue, changes in their flow or regulation may provide useful biological context for interpreting these disorders.