oxygen saturation

(redirected from Dissolved Oxygen)
Also found in: Acronyms, Wikipedia.


the state of being saturated, or the act of saturating.
oxygen saturation the amount of oxygen bound to hemoglobin in the blood, expressed as a percentage of the maximal binding capacity.

oxygen saturation

1 the fraction of the hemoglobin molecules in a blood sample that are saturated with oxygen at a given partial pressure of oxygen. Normal saturation is 95% to 100%.
2 percentage of hemoglobin-bound oxygen compared to total capacity of the hemoglobin.

oxygen saturation

sO2 The O2 concentration of blood expressed as a ratio of its total O2-carrying capacity; the OS is a measure of the utilization of O2 transport capacity; sO2 is ↑ at high altitude, hypocapnia, hypothermia, ↑ cardiac output, O2 therapy, PEEP–positive end-expiratory pressure ventilation, and respiratory alkalosis. sO2 is ↓ with AV shunting, carbon monoxide poisoning, congenital cardiac defects, emphysema, hypercapnia, hypoventilation, hypoxia, respiratory acidosis Ref range 95-98% arterial; 60-80% venous

ox·y·gen sat·u·ra·tion

(SaO2) (ok-si'jĕn sach'ŭr-ā'shŭn)
The percentage of oxygen-binding sites in blood that are combined with oxygen.


a chemical element, atomic number 8, atomic weight 15.999, symbol O. See Table 6. It is a colorless and odorless gas that makes up about 20% of the atmosphere. In combination with hydrogen, it forms water; by weight, 90% of water is oxygen. It is the most abundant of all the elements of nature. Large quantities of it are distributed throughout the solid matter of the earth, because the gas combines readily with many other elements. With carbon and hydrogen, oxygen forms the chemical basis of much organic material. Oxygen is essential in sustaining all kinds of life.

oxygen analyzer
an instrument that measures the concentration of oxygen in a gas mixture.
oxygen deficiency
significant cause of losses in cultivated finfish in enclosed dams, but also in rivers and estuaries, caused by lack of natural aeration of the water or to heavy algal blooms, bushfire ash deposits and overcast conditions leading to respiration rather than photosynthesis or a high concentration of organic matter and leading to the development of a bacterial bloom; a high temperature exacerbates the development.
oxygen flux equation
a calculation that determines the rate at which oxygen is made available to tissues, based on cardiac output and arterial oxygen content.
oxygen-hemoglobin dissociation curve
a graphic explanation of the release and acquisition of oxygen from and to the hemoglobin in the blood in varying circumstances of oxygen partial pressure in the environment.
oxygen regulator
see reducing valve.
oxygen saturation
the amount of oxygen bound to hemoglobin in the blood expressed as a percentage of the maximal binding capacity.
oxygen saturation curve
graphical representation describing the relationship (usually curvilinear) between fraction of oxygen-binding sites (of a protein) that have oxygen bound to them and the partial pressure (concentration) of free oxygen.
oxygen tank
the heavy metal cylinder in which medical gases are compressed at high pressure. Called also oxygen cylinder.
oxygen tension
see tension (2).
oxygen tent
an enclosed space or plastic canopy used for oxygen therapy, humidity therapy or aerosol therapy.
oxygen therapy
supplemental oxygen administered for the purpose of relieving hypoxemia and preventing damage to the tissue cells as a result of oxygen lack (hypoxia). Companion animals are usually placed in a special cage with oxygen piped to it. A mask is used for short-term administration. Large animals can be supplied by a nasal tube taped in place to deliver oxygen into the pharynx.
oxygen toxicity
tissue damage may occur with exposure to high concentrations of oxygen for long periods. See also retrolental fibroplasia.
oxygen-transfer chain
a functional chain describing the transfer of oxygen from the external environment to the metabolizing tissue; includes uptake in the respiratory system, binding to hemoglobin, transport through the circulatory system, diffusion and dissociation in tissues and utilization in mitochondria, i.e. oxidatable substrates and enzymes.
oxygen transport
process of transfer of oxygen around the body either attached to hemoglobin or myoglobin.
References in periodicals archive ?
7 to 3 pounds of dissolved oxygen per hour per horsepower to high solids wastewater.
The values of the chemical parameters of the groundwater were lower than the threshold in all the cases except total hardness and dissolved oxygen.
Numerous studies have shown that lower dissolved oxygen concentrations affect species composition, relative abundance, growth, maturation, and reproductive capacity.
These meters also have advanced features such as auto-recognizing polarographic or RDO optical dissolved oxygen probes, 2000 data point memory with time and date stamp, RS232 and USB interfaces and selectable settings to meet your needs for readings, response, accuracy and repeatability.
More recently, Torrans and MSU's James Steeby developed specific dissolved oxygen recommendations for catfish hatcheries.
5% of Aterbane[R] BR was marked decrease in levels of dissolved oxygen in water from 48 hours of exposure in all treatments compared to treatment with 0.
Dafydd Evans, head of fisheries at the Environment Agency, said: "In hot weather, fast-growing freshwater algae increases its activity which can exhaust much of the dissolved oxygen in streams, ponds and lakes, depriving fish species of the oxygen they need to survive.
It will have a higher flushing rate, resulting in more dissolved oxygen, which is generally low in the northeastern Ontario lakes, says Mooney.
Among the causes offered to explain the event (Pearce & Balcom 2005) were a biologic infection exacerbated by environmental stressors (high temperature, low dissolved oxygen, and high concentrations of sulfide and ammonium).
The Harbour Four unit is used to reinforce the bay's aeration network before dissolved oxygen levels fall belowsnbsp; statutory levels in deeper areas of the bay and Ely river, during long dry spells, high temperatures and low winds.
Laboratory experiments were conducted to investigate the physiological tolerance ranges of the mayfly Caenis latipennis (Ephemeroptera: Caenidae) from Tanyard Branch Creek in Walker County, Texas in response to stepwise fluctuations in dissolved oxygen concentrations, temperature and pH.