Oxygen saturation
Oxygen saturation (symbol SO2) is a relative measure of the concentration of
Oxygen saturation can be measured regionally and noninvasively. Arterial oxygen saturation (SaO2) is commonly measured using pulse oximetry. Tissue saturation at peripheral scale can be measured using NIRS. This technique can be applied on both muscle and brain.
In medicine
In medicine, oxygen saturation refers to oxygenation, or when oxygen molecules (O
2) enter the tissues of the body. In this case blood is oxygenated in the lungs, where oxygen molecules travel from the air into the blood. Oxygen saturation ((O
2) sats) measures the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. Fish, invertebrates, plants, and aerobic bacteria all require oxygen.
In environmental science
In aquatic environments, oxygen saturation is a ratio of the concentration of "dissolved oxygen" (DO, O2), to the maximum amount of oxygen that will dissolve in that water body, at the temperature and pressure which constitute stable equilibrium conditions. Well-aerated water (such as a fast-moving stream) without oxygen producers or consumers is 100% saturated.[2]
It is possible for stagnant water to become somewhat
See also
- Oxygen deficiency
References
- ^ "Dissolved Oxygen - Environmental Measurement Systems". Environmental Measurement Systems. Retrieved 2015-10-08.
- ^ a b "Environmental Dissolved Oxygen Values Above 100% Air Saturation" (PDF). Yellow Springs, Ohio: YSI Environmental. 2005.
- ^ "Oxygen saturation monitor". Cardiac Sense. Retrieved 2015-02-08.
- ^ S2CID 30164910.
- ^ "Dissolved Oxygen and Biochemical Oxygen Demand". Water: Monitoring & Assessment. Washington, DC: United States Environmental Protection Agency (EPA). 2012-03-06. Table 5.3.
- ^ Chesapeake Bay Total Maximum Daily Load for Nitrogen, Phosphorus and Sediment (Report). Philadelphia, PA: EPA. 2010-12-29. p. 3-10.