Surf Wiki
Save to docs
general/respiration

From Surf Wiki (app.surf) — the open knowledge base

Oxygenation index

Calculation used to measure oxygen in humans

Calculation used to measure oxygen in humans

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{Fi\ce{O2} \times M_\text{PAW}}{Pa\ce{O2}}

  • Fi\ce{O2}: Fraction of inspired oxygen, in percent;
  • M_\text{PAW}: Mean airway pressure, in mmHg;
  • Pa\ce{O2}: Partial pressure of oxygen in arterial blood, in mmHg.

References

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.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

respiration
Want to explore this topic further?

Ask Mako anything about Oxygenation index — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report