Yeah that is what I thought. I said about 700 just doing the math in my head but he said no...PAO2 = ( FiO2 * (Patm – PH2O)) – (PaCO2 / RQ).
It depends on certain factors. Are you at sea level? Do they have a normal resp quotient? What's the PACO2.
If you are to assume everything is "normal" with a PaCO2 of 40 then it would be ~663mmHg
Ugh I used to have a few obnoxious attendings that would ask basic anesthesia physics-ish questions like this, give an answer and never explain. Very, very frustrating.So -
He didn't follow that by telling you the answer and how he arrived at it?
That's some mighty fine teaching there, Lou.
We multiply by 5 herePaO2 is measured. PAO2 can be calculated using the equation, quick and dirty way is to multiply the FiO2 by 6 and you'll get close assuming no extremes of elevation, normal pCO2
What's the highest number anyone on SDN has ever seen on an ABG for the PAO2? There is theoretical and then there is real world.