Mumford-Shah Functional: Difference between revisions

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The '''oxygenation index''' is a calculation used in intensive care medicine to measure the [[fraction of inspired oxygen]] (FiO2) and its usage within the body.


A lower oxygenation index is better - this can be inferred by the equation itself.  As the oxygenation of a person improves, they will be able to achieve a higher PaO2 at a lower FiO2.  This would be reflected on the formula as a decrease in the numerator or an increase in the denominator - thus lowering the OI.  Typically an OI threshold is set for when a neonate should be placed on ECMO, for example >40.


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== Equation ==
:<math> OI = \frac{F_i O_2 * M_{PAW}}{P_a O_2}</math><ref>Ortiz RM, Cilley RE, Bartlett RH. Extracorporeal membrane oxygenation in pediatric respiratory failure. Pediatr Clin North Am. 1987 Feb;34(1):39-46.</ref>
 
* FiO2 = [[Fraction of inspired oxygen]]
* MPAW = [[Mean airway pressure]]
* PaO2 = Partial pressure of oxygen in arterial blood
 
== References ==
<references/>
 
{{Mechanical ventilation}}
 
[[Category:Respiration]]

Latest revision as of 05:56, 16 October 2013

The oxygenation index is a calculation used in intensive care medicine to measure the fraction of inspired oxygen (FiO2) and its usage within the body.

A lower oxygenation index is better - this can be inferred by the equation itself. As the oxygenation of a person improves, they will be able to achieve a higher PaO2 at a lower FiO2. This would be reflected on the formula as a decrease in the numerator or an increase in the denominator - thus lowering the OI. Typically an OI threshold is set for when a neonate should be placed on ECMO, for example >40.

Equation

[1]

References

  1. ↑ Ortiz RM, Cilley RE, Bartlett RH. Extracorporeal membrane oxygenation in pediatric respiratory failure. Pediatr Clin North Am. 1987 Feb;34(1):39-46.

Template:Mechanical ventilation

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