oxygen saturation

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Related to oxygen saturation: oxygen saturation test, Central Venous Oxygen Saturation, oxygen saturation curve


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 ?
In the presence of either Met-Hb or CO-Hb, the pulse oximetry oxygen saturation will be incorrect--it will match neither the S[O.
Furthermore, if home oxygen therapy is being considered, parents need to be warned that the level of supplementary oxygen required maintaining an adequate oxygen saturation level will vary according to the infant's posture.
Although there was no overall difference between the two oxygen saturation groups using the composite outcome measure, marked differences were observed when the two components of the measure were considered independently, the authors wrote.
Blood oxygen saturation was simultaneously measured with forehead and finger sensors and arterial oxygen saturation measures taken with an arterial blood sample through the existing arterial line.
Beall also reported that high-altitude Tibetans possess a blood-hemoglobin concentration similar to sea-level folk combined with low oxygen saturation.
Hand-held pulse oximetry devices used to measure oxygen saturation are accurate, easy to use, and relatively inexpensive, generally costing less than $1,000, added Dr.
Use of the patient monitoring system can help medical professionals identify low regional brain blood oxygen saturation and take corrective action.
The ability to accurately measure oxygen saturation in states of low perfusion in acute care patients is critical for intensive care units," said Prof.
Study participants had their blood tested for oxygen saturation each morning upon awakening, and every participant experienced significant increases in oxygen saturation after using the Snoreless Pillow.
A falsely decreased oxygen saturation by pulse oximetry could be excluded by spectrophotometric measurement of oxyhemoglobin and deoxyhemoglobin (2).
The inclusion of a young woman with low oxygen saturation (Sa02 = 84 percent) was not intended to mislead.
ccNexfin has an Unique Offering With Totally Noninvasive Beat-to-Beat Blood Pressure (BP), Cardiac Output (CO), and Masimo's Breakthrough Noninvasive Hemoglobin and Oxygen Saturation Measurements