In this episode of Inside EMS, cohosts Chris Cebollero and Kelly Grayson are once again joined by paramedic student April McKenzie, a.k.a., “April Anonymous,” for a deep dive on measuring arterial blood gas.

Chris and Kelly walk April (and anyone else grinding through class) through the core idea that everything hinges on knowing “normal.” Once you lock in pH, CO₂ and bicarb ranges, the rest becomes pattern recognition, not panic.

The big takeaway? Master normal, stay curious and treat every patient like a learning opportunity. Because the more normals you encounter, the faster you’ll catch what’s not.

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