Oxygen Levels
Oxygen Levels - Related Videos
11:49
Quantitative and Temporal Control of Oxygen Microenvironment at the Single Islet Level
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Cited by 10 •
2013
Microfluidic oxygen control confers more than just convenience and speed over hypoxic chambers for biological experiments. Especially when implemented via diffusion through a membrane, microfluidic oxygen can provide simultaneous liquid and gas phase modulations at the microscale-level. This technique enables dynamic multi-parametric experiments critical for studying islet pathophysiology.
03:46
Blood Oxygen Level-Dependent Functional Magnetic Resonance Imaging of the Visual Cortex
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2025
Source: Galenchik-Chan, A., et al. Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation. J. Vis. Exp. (2023). The video demonstrates functional magnetic resonance imaging (fMRI) of the visual cortex to map activity based on blood oxygenation levels. Structural MRI images are acquired as anatomical references, followed by fMRI scans. Visual stimuli are displayed to activate retinotopic neurons in the visual cortex. The increased energy demand...
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...
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.
09:38
Dissolved Oxygen in Surface Water
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Dissolved oxygen (DO) measurements calculate the amount of gaseous oxygen dissolved in surface water, which is important to all oxygen-breathing life in river ecosystems, including fish species preferred for human consumption (e.g. bluegill and bass), as well as decomposer species critical to the recycling of biogeochemical materials in the system. The oxygen dissolved in lakes, rivers, and oceans is crucial for the...
FAQs
Ventilation brings oxygen into the lungs, where it crosses into the bloodstream and binds to hemoglobin. This sequence links air movement with blood-based transport, allowing oxygen to reach tissues that depend on it for cellular function. A disturbance in respiratory or circulatory support can therefore alter oxygen availability at more than one stage.
Pulse oximetry estimates arterial oxygen saturation, whereas blood gas analysis measures oxygen partial pressure. These measurements describe different aspects of oxygen status and can therefore complement one another during clinical assessment. Considering both may help clinicians evaluate respiratory or cardiovascular impairment, characterize disease severity, and assess how a patient responds to treatment.
Repeated monitoring helps clinicians identify changes in oxygen status as disease severity evolves or treatment takes effect. Tracking values over time also supports evaluation of treatment response rather than relying only on an initial assessment. This approach is especially relevant when patients require ongoing observation or critical care for respiratory or cardiovascular impairment.
Pulse oximetry provides an estimate of arterial oxygen saturation during clinical assessment. Its value lies in allowing clinicians to monitor oxygen status repeatedly while evaluating whether a patient’s condition is changing or treatment is helping. This makes it useful for assessing disease severity and following patients who require ongoing or critical care.
Blood gas analysis is informative when clinicians need a measurement of oxygen partial pressure rather than an estimate of arterial oxygen saturation. It adds a distinct view of oxygen status to pulse oximetry and can help characterize respiratory or cardiovascular impairment. The result may support assessment of disease severity and evaluation of response to treatment.
Clinicians use oxygen-level measurements to guide oxygen therapy and to judge whether management is producing the intended response. Repeated assessment can show changes in oxygen status as disease severity evolves or treatment takes effect. This is particularly relevant for patients needing ongoing observation or critical care, where monitoring supports continued clinical evaluation.