ABG Interpretation

I’ve frequently seen students and even practitioners struggle with ABG interpretation due to what I believe is the lack of a consistent system.

I like to look at the pH and then systematically classify the CO2 and Bicarbonate as either a driver or compensation mechanism. Once you determine these two things, it becomes much easier to interpret.

This can sometimes be complicated in the setting of mixed/combined pH imbalances, but I will talk about that in another post. I have however included two formulas for CO2 compensation at the bottom of the graphic. I will be posting a video next week breaking down the process of using this sheet. I hope you all will find this useful.

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