00:00
Look, we made it, step 6.
00:04
This one is very
straightforward, you look at the O2 .
00:07
Okay, a PaO2 - that's the partial
pressure of oxygen in arterial blood.
00:13
So normal is 80 to 100 (mmHg),
now that's a textbook value.
00:17
Now keep in mind that's
different than an SaO2
I can get an SaO2 or a Sat, it's the measurement of the
percentage of how much hemoglobin is saturated with oxygen.
00:29
So we get that from a pulse ox.
00:30
We're shooting at 95 to 100% in a perfect
world but I want you to really focus on the PaO2,
the partial pressure of
oxygen in arterial blood.
00:41
That's a much more reliable
measure than a pulse ox
but to get van ABG, you have
got to stick a patient in an artery.
00:49
With a pulse ox, I just put a plastic
clip on and I can get that number.
00:53
So we're shooting for 80 to 100 (mmHg).
00:57
Okay, let's review the 6 steps.
01:00
We've got number 1 -
look at the pH and label it.
01:03
Number 2 look at the CO2 and label it,
Number 3 - look at the bicarb and label it,
Number 4 - pH matchup, which
label matches the pH label?
Then the 5th step, is
look at the opposite system
and see if it's responding in a way that's
appropriate to bring the pH back to normal.
01:22
So that value in the opposite system
has to be outside of the normal range
in a way that's helpful to
bring that pH back to normal
6th step? Just evaluate the O2.
01:33
We're looking for a PaO2
that is within 80 to 100 (mmHg)
Okay, so let's do a quick review.
01:41
So you know where you are, whether you're
acidosis or alkalosis by looking at the pH.
01:46
You know who got you there, whose fault
it is, it's either the lungs controllling CO2
or the kidneys or metabolic
system controlling the bicarb.
01:55
Then you look at compensation.
01:57
Is that opposite system acting like a hero?
Is it helping that pH get
back to within normal?
because it's either a respiratory acidosis
or alkalosis, metabolic acidosis or alkalosis.