SaO₂ estimada (PaO₂)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
curva O₂
About this calculator
The SaO₂ estimated (PaO₂) calculator uses the oxygen dissociation curve to estimate the arterial oxygen saturation from the arterial partial pressure of oxygen (PaO₂).
This tool is useful in intensive care situations, where direct measurement of SaO₂ may not be available.
However, it is essential to remember that this is only an approximation and should not be used as a substitute for direct SaO₂ measurements.
Additionally, the oxygen dissociation curve can be affected by various factors, such as body temperature and the presence of substances that interact with oxygen.
Frequently asked questions
What is the oxygen dissociation curve?
The oxygen dissociation curve is a relationship between the arterial partial pressure of oxygen and the arterial oxygen saturation. It is essential to understand how oxygen binds and unbinds from hemoglobin.
Why should SaO₂ estimated not be used as a substitute for direct SaO₂ measurements?
SaO₂ estimated is only an approximation and can be influenced by various factors, such as body temperature and the presence of substances that interact with oxygen. Therefore, it is essential to use direct measurements whenever possible.
What factors can affect the oxygen dissociation curve?
Body temperature, the presence of substances that interact with oxygen, and other factors can affect the oxygen dissociation curve, leading to inaccurate results if not considered.
When should I use the SaO₂ estimated calculator?
The SaO₂ estimated calculator is useful in intensive care situations, where direct measurement of SaO₂ may not be available. However, it is essential to remember that this is only an approximation and should not be used as a substitute for direct SaO₂ measurements.
What should I do if the SaO₂ estimated is different from the directly measured SaO₂?
If the SaO₂ estimated is different from the directly measured SaO₂, it is essential to investigate the cause of the difference. This may be due to factors such as body temperature or the presence of substances that interact with oxygen.