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
- : Fraction of inspired oxygen, in percent;
- : Mean airway pressure, in mmHg;
- : Partial pressure of oxygen in arterial blood, in mmHg.
gollark: I mean, in the absence of any idiomatic-Lua-y solution, it seems best, and I'd prefer to not downgrade Skynet to JSON.
gollark: Why is it that bad?
gollark: <@237328509234708481> Thoughts?
gollark: (though since lua loves its strings-as-byte-arrays that wouldn't be great)
gollark: I mean, you could allow use of arrays of bytes (well, tables) if it's that awful.
References
- Ortiz RM, Cilley RE, Bartlett RH. Extracorporeal membrane oxygenation in pediatric respiratory failure. Pediatr Clin North Am. 1987 Feb;34(1):39-46.
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