Cerebral Oxygenation
Cerebral Oxygenation - Related Videos
08:58
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
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Cited by 28 •
2011
We present an experimental procedure for measuring the partial pressure of oxygen (pO2) in cerebral vasculature based on oxygen-dependent quenching of phosphorescence. Animal preparation and imaging procedures were outlined for both large field of view CCD-based imaging of pO2 in rats and 2-photon excitation based imaging of pO2 in mice.
11:39
Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
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Cited by 49 •
2013
We combined frequency-domain near-infrared spectroscopy measures of cerebral hemoglobin oxygenation with diffuse correlation spectroscopy measures of cerebral blood flow index to estimate an index of oxygen metabolism. We tested the utility of this measure as a bedside screening tool to evaluate the health and development of the newborn brain.
13:50
Focal Cerebral Ischemia Model by Endovascular Suture Occlusion of the Middle Cerebral Artery in the Rat
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Cited by 107 •
2011
Surgical induction of ischemic brain damage in the rat is a widely used model for stroke research. Here we demonstrate the induction of focal cerebral ischemia by occlusion of the middle cerebral artery. Visualization of the resulting infarct by histological staining and magnetic resonance imaging is also shown.
09:08
Detecting Reactive Oxygen Species
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2023
Reactive oxygen species are chemically active, oxygen-derived molecules capable of oxidizing other molecules. Because of their reactive nature, there are many deleterious effects associated with unchecked ROS production, including structural damage to DNA and other biological molecules. However, ROS can also be mediators of physiological signaling. There is accumulating evidence that ROS play significant roles in everything from activation of transcription factors to the mediation of...
02:11
Induction of Cerebral Microhemorrhages in a Rat Model Using Lipopolysaccharide
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2025
This video demonstrates the process of inducing blood-brain barrier (BBB) disruption and cerebral microhemorrhages in a rat model using lipopolysaccharide (LPS). It highlights the sequence of immune responses that lead to increased BBB permeability and subsequent brain tissue damage.
FAQs
Cerebral oxygenation reflects the interaction of three linked factors: cerebral blood flow, arterial oxygen content, and diffusion into tissue. A reduction in any one can limit oxygen availability even when the others remain adequate. Considering these factors together helps clinicians interpret changes in brain oxygenation as possible disturbances in perfusion or oxygen delivery rather than as isolated measurements.
Near-infrared spectroscopy uses the different light absorption properties of oxygenated and deoxygenated hemoglobin. By analyzing near-infrared light behavior, it estimates oxygenation in a localized area of tissue without requiring an invasive measurement. This optical distinction makes the technique useful for tracking regional changes over time, particularly when continuous observation of cerebral oxygen status is important.
Tracking cerebral oxygenation can reveal inadequate oxygen supply early, when cerebral perfusion or delivery may be impaired. This early information gives clinicians an opportunity to recognize a potentially unfavorable change and consider its significance alongside the patient’s condition. Monitoring trends also supports research into how altered oxygen availability relates to neurological function and brain injury.
During anesthesia and surgery, clinicians can use noninvasive regional oxygenation estimates to follow changes in brain oxygen status. Near-infrared spectroscopy is particularly relevant because it distinguishes oxygenated from deoxygenated hemoglobin through their different absorption of near-infrared light. This approach supports ongoing observation during procedures in which cerebral perfusion or oxygen delivery may require clinical attention.
Assessment is relevant in stroke, traumatic brain injury, neonatal complications, and conditions involving impaired cerebral perfusion. In these settings, oxygenation information can help characterize whether brain tissue may be receiving inadequate oxygen and can contribute to clinical evaluation. The same measurements also support investigation of how altered oxygen supply relates to neurological dysfunction and injury.
Cerebral oxygenation data can alert clinicians to inadequate oxygen supply and provide information that supports management decisions. Interpretation is based on the relationship between oxygenation, cerebral blood flow, arterial oxygen content, and tissue diffusion. In addition to guiding care, repeated assessment can improve understanding of brain physiology and help clarify patterns associated with neurological injury.