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Oxygenation index : ウィキペディア英語版
Oxygenation index
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 ==
: OI = \frac〔Ortiz RM, Cilley RE, Bartlett RH. Extracorporeal membrane oxygenation in pediatric respiratory failure. Pediatr Clin North Am. 1987 Feb;34(1):39-46.〕
* FiO2 = Fraction of inspired oxygen
* MPAW = Mean airway pressure
* PaO2 = Partial pressure of oxygen in arterial blood

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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