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Pulse oximetry. A pulse oximeter. Pulse oximetry is a noninvasive method for monitoring blood oxygen saturation. Peripheral oxygen saturation (Sp O2) readings are typically within 2% accuracy (within 4% accuracy in 95% of cases) of the more accurate (and invasive) reading of arterial oxygen saturation (Sa O2) from arterial blood gas analysis.
Hypoxia (medicine) Hypoxia is a condition in which the body or a region of the body is deprived of adequate oxygen supply at the tissue level. [ 1] Hypoxia may be classified as either generalized, affecting the whole body, or local, affecting a region of the body. [ 2] Although hypoxia is often a pathological condition, variations in arterial ...
Hyperoxia occurs when cells, tissues and organs are exposed to an excess supply of oxygen (O 2) or higher than normal partial pressure of oxygen. [1]In medicine, it refers to excessive oxygen in the lungs or other body tissues, and results from raised alveolar oxygen partial pressure ― that is, alveolar oxygen partial pressure greater than that due to breathing air at normal (sea level ...
Many people with chronic obstructive pulmonary disease have a low partial pressure of oxygen in the blood and high partial pressure of carbon dioxide. Treatment with supplemental oxygen may improve their well-being; alternatively, in some this can lead to the adverse effect of elevating the carbon dioxide content in the blood ( hypercapnia) to ...
Unlike a standard MRI, which produces 3D images of the brain, a functional MRI measures activity in the brain based on blood flow. When conscious people are told to follow a command, certain areas ...
Conan Glasses. Dr. Raviv is impressed by Foster Grant’s Multi Focus technology, which offers three magnification strengths in one pair: One for interacting with people at the top, one for using ...
Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen ( O. 2) at increased partial pressures. Severe cases can result in cell damage and death, with effects most often seen in the central nervous system, lungs, and eyes. Historically, the central nervous system condition was called the Paul Bert effect ...
To summarize, red blood cells carry oxygen less well, there are fewer blood vessels, and older brain cells need more oxygen. These changes all work together to make the brain much more susceptible ...