oxygen saturation

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


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 ?
The report explained that fish were very sensitive to low dissolved oxygen levels and high temperatures, since the level of dissolved oxygen decreases further at high temperatures and can cause fish mortality.
Quantification of oxyrase units was carried out with dissolved oxygen (DO) meter using modified method of Tuitemwong et al.
Segmentation by technology of the dissolved oxygen meter market
Sarkar and Pandey presented the use of artificial neural network technique to estimate the dissolved oxygen concentrations downstream of Mathura city, India.
Obtaining true, physiologically-relevant oxygen levels in media requires significant time--it may even take up to two days to achieve a dissolved oxygen concentration of 2 percent.
The values of the chemical parameters of the groundwater were lower than the threshold in all the cases except total hardness and dissolved oxygen.
Table 1: Dissolved Oxygen (DO mg/lit) for various kinds of mixers
Determination of physico-chemical variables of the test media Water temperature, electrical conductivity, pH and dissolved oxygen of the test media were determined twice a day by using digital meters, viz.
The largest changes in dissolved oxygen and pH occurred at dawn and dusk when aquatic plants switched from photosynthesis to respiration.
The offerings include the Oxyferm FDA ARC for electrochemical dissolved oxygen measurement in pharmaceutical fermentation processes; the Oxygold G and B ARC for low-ppb dissolved oxygen trace measurements in water and beverages; and the Conducell PWSE ARC, which delivers low conductivity (0.
These meters also feature unique advantages not found in other meters such as direct Orion Star stirrer probe control, auto-recognizing for polarographic or RDO optical dissolved oxygen probes and selectable settings to meet all needs for readings, response, accuracy and repeatability.
More recently, Torrans and MSU's James Steeby developed specific dissolved oxygen recommendations for catfish hatcheries.