These types of equations that we
utilize from this example formula.
Let’s go through three examples.
The first one is normal arterial blood.
So you get a blood gas from someone.
The bicarb comes back at 24 millimolar.
The PaCO2, this is PaCO2 is 40 millimeter of mercury.
You plug into this equation
and you should get a pH of 7,4.
How to encourage you to be able to do that?
So you can make sure you can get
the same numbers as we’re showing here.
Now, let’s take a different example.
This is an acidic environment. So they might
were expecting that they might have an acidemia.
They have a bicarb of 26, PaCO2 0f 60.
The result of pH of 7,26.
So it is confirm,
this person has an acidemia.
If we expect an alkalemic blood, what we
wanna do is get a blood gas from that person.
We find that we have a bicarb of 22 millimolar,
and we have a PaCO2 of 20 millimeter of mercury.
We put both of those into this equation.
And again, an equation is 6,1 plus the log
of the bicarb, divided by the PCO2.
But remember, PCO2 we have to multiply it by
a factor to get it into a dissolve form.
Should yield 7,66.
So that’s confirmed this is an alkalemia.
So you can use this
And we can see how it was
develop via titration curves
to calculate anybody’s pH
if we have an arterial blood gas.