| Oxygen Saturation |
Article Index for Oxygen |
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Information AboutOxygen Saturation |
| CATEGORIES ABOUT OXYGEN SATURATION | |
| aquatic ecology | |
| blood | |
| water quality indicators | |
| oxygen | |
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MEDICAL SCIENCE In Medicine , oxygen saturation (SaO2) measures the percentage of Hemoglobin binding sites in the bloodstream occupied by oxygen. At low partial pressures of oxygen, most hemoglobin is deoxygenated. At around 90% (the value varies according to the clinical context) oxygen saturation increases according to an S Curve and approaches 100% at partial oxygen pressures of >10 kPa. A Pulse Oximeter relies on the light absorption characteristics of saturated hemoglobin to give an indication of oxygen saturation. An SaO2 (arterial oxygen saturation) value below 90% is termed Hypoxemia . This may be due to various medical conditions. ENVIRONMENTAL SCIENCES In Aquatic environments, oxygen saturation is a relative measure of the amount of Oxygen (O2) dissolved in the water. '''Dissolved oxygen''' ('''DO''') is measured in standard solution units such as millimoles O2 per liter (mmol/L), milligrams O2
Solubility tables (based upon temperature) and corrections for different salinities and pressures can be found at the USGS web site . Tables such as these of DO in milliliters per liter (ml/L) are based upon equations that have been worked out and tested>B_3 = -0.001700, ''T'' = temperature in Kelvin s, and ''S'' = Salinity in g/kg. DO = dissolved oxygen in ml/L. Multiply DO by 1.4276 to obtain mg/L. Reg Phytoplankton . Supersaturation can sometimes be harmful for organisms and cause '' Gas Bubble Disease ''. REFERENCE
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