Oxygen Deficit


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oxygen deficit

[′äk·sə·jən ‚def·ə·sət]
(geochemistry)
The difference between the actual amount of dissolved oxygen in lake or sea water and the saturation concentration at the temperature of the water mass sampled.

Oxygen Deficit

 

oxygen debt, the additional amount of oxygen required by the body to oxidize the incompletely oxidized metabolic products that have accumulated after physical exertion.

Oxygen deficit is evidence that oxygen intake has failed to keep pace with the body’s need for oxygen during work. Determination of the oxygen deficit, by studying gas exchange, is important in solving certain questions of the physiology of work and sport. It is also important in evaluating the condition of the cardiovascular and respiratory systems. The term “oxygen deficit” is sometimes taken to mean the difference between the body’s need for oxygen and the amount that it actually consumes under a variety of circumstances (oxygen deficiency, or hypoxia).

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Under normal circumstances the blood supplies enough oxygen to the liver, but if hepatocytes use up more oxygen because of the breakdown of alcohol, oxygen deficits (i.
Disease and death has been linked to oxygen deficit in every contest investigated to-date (citations included in Part 1 of this column.
However, their focus on carbon, in my view, misses the essential point: Oxygen deficit is a much more immediate and dangerous threat to planetary life than carbon excess.
Three products based on its perfluorochemical technologies are currently in development: Oxygent (perflubron emulsion), its intravascular oxygen carrier to temporarily augment oxygen delivery in surgical and other patients at risk of acute tissue oxygen deficit, which is being co-developed with affiliates of Johnson & Johnson; LiquiVent(R)(neat perflubron), an intrapulmonary agent to reduce a patient's exposure to the harmful effects of conventional mechanical ventilation, which is being co-developed with Hoechst Marion Roussel; and Imagent US, an intravenous contrast agent for enhancement of ultrasound images to assess cardiac function and detect blood flow abnormalities (perfusion defects), which is being co-developed with Schering AG, Germany.
Three products based on its perfluorochemical technologies are currently in development: Oxygent(TM) (perflubron emulsion), its intravascular oxygen carrier to temporarily augment oxygen delivery in surgical and other patients at risk of acute tissue oxygen deficit, which is being co-developed with affiliates of Johnson & Johnson; LiquiVent(R) (neat perflubron), an intrapulmonary agent to reduce a patient's exposure to the harmful effects of conventional mechanical ventilation, which is being co-developed with Hoechst Marion Roussel; and Imagent(R) US, an intravenous contrast agent for enhancement of ultrasound images to assess cardiac function and detect blood flow abnormalities (perfusion defects), which is being co-developed with Schering AG, Germany.
Vascular and cardiac surgical procedures are our entry points into the market as these procedures are associated with known high incidence and risk of cerebral oxygen deficit injury.
Alcohol metabolism leads to hepatic oxygen deficits, adducts and ROS formation, and interaction between alcohol metabolites.
Overall water quality, especially in terms of oxygen deficits, NH4-N concentrations, and P[O.
Oxygen deficits and the formation of hydrogen sulphide are consequences of this, especially in the deeper waters of the central and southwest Baltic.
Under the US$21-million contract, the joint venture will design and oversee the dredging of various tributaries around the city to remove combined sewer overflow (CSO) mounds that contribute to nuisance odors and dissolved oxygen deficits at the head end of the tributaries.
We observed significantly lower dissolved oxygen levels and higher oxygen deficits (dissolved oxygen at saturation minus measured dissolved oxygen) at both Stations 4 and 5 (Table 1).
In neonates, infants and children, cerebral and somatic rSO2 provide noninvasive indications of oxygen changes in the cerebral and peripheral circulatory systems and may provide an early indication of oxygen deficits associated with impending shock states and anaerobiosis.