00:00
Okay so now we're gonna look at how you figure out
how the patient got there and who's fault it is.
00:07
We introduced that a little bit
in the beginning of the video,
but now I wanna talk to
you how you actually do it.
00:11
It's step 4.
00:13
We got to let the pH match up.
00:15
We're looking for the level that matches
the pH and we know that one is the problem.
00:20
Now when we say the "level", that means
we're talking about the CO2 or the bicarb.
00:26
So remember in steps
1,2 and 3, you label the pH,
step 2 - you label the CO2,
step 3 - you label the bicarb
Now we're gonna look at the label that you put on
the CO2 and the label that you put on the bicarb
and see which one is the
same as the label for pH.
00:44
If the label that you put
on the bicarb matches,
then the kidneys are the problem
or the cause of the imbalance.
00:52
If the CO2 matches the same
label that you put on the pH,
then the lungs are the problem
or the cause of the imbalance.
01:01
Okay, so look what we did for you
here on the couch of homeostasis.
01:04
You'll see that the pH of 7.35
to 7.45 is right in the middle
but look at what they
did with the arrows, right?
so the CO2 is the darkest
if you're going this direction.
01:17
If you're greater than 45 and you're getting
more acidic, notice there's a darker color
On the bicarb with 22-26, I should get higher
levels of bicarb, you're moving more alkalotic
Soso this is a great visual image
to check your understanding.
01:36
Does that make sense to you why those arrows are
lighter-colored than one end and darker on the other?
So check your understanding
before we keep moving on.
01:47
Okay, you ready to have some fun?
I'm excited for you to see how
much you've already learned.
01:52
I should walk through this video with us.
01:54
So we're gonna look at a ph of
7.30, a CO2 of 55 and a bicarb of 23.
02:02
Now let's do steps 1, 2 and 3.
02:04
So look at the pH - step 1
is look at the pH and label it.
02:08
You go first then I'll give you the answer.
02:15
Alright, a pH of 7.30 is less than
normal so I'm gonna label that acidic.
02:24
Next you look at the CO2 and label it.
02:31
Sweet!
A CO2 of 55 is outside of normal, right?
because I know a normal CO2 is 35 to 45.
02:41
So 55 is definitely greater than
that, I'm gonna label it as acidotic.
02:46
So I've done stop 1, I've done step2.
02:50
I labelled the pH and the
CO2 - they're both acidosis.
02:54
Now I'm gonna look at the bicarb.
02:57
You go first.
03:02
Cool, the bicarb is normal.
03:05
so I've done steps 1,2 and 3, we've
labelled the pH, the CO2 and the bicarb.
03:14
You know what's left now is step 4.
03:17
We're gonna do the pH
matchup, see which one matches
Well the pH is labeled acidosis.
the CO2 is also labeled acidosis.
03:24
The CO2 is also labeled acidosis.
03:27
The bicarb is normal.
03:29
So since the CO2 matches the pH's label,
then we know that the cause is respiratory.
03:36
So we're in acidosis, we know it's the
lungs' fault, so we're in respiratory acidosis.
03:43
Cool, the metabolic problem was an
issue because we still had a normal range.
03:48
Now we'll talk about what the
kidney should be doing in the next step.
03:52
But for now, let's focus on figuring
out which of the big 4 you're at.
03:57
Because in acidosis, that
tells us the pH is less than 7.35
We're in a respiratory acidosis because
those are the two labels that match.
04:07
It's the lungs' fault because
they control the level of CO2.
04:12
Okay, now here steps
1 through 4 on your own.
04:16
So pause thw video, walk
through labelling the pH,
looking at the CO2 and label it,
looking at the bicarb and labelling it
and step 4, doing the pH match up and you
come up with which one of the four places you are
Okay, let's see how you did.
04:37
In step 1, the pH was 7.54
So since that's greater than 7.45, I
hope you've labelled that alkalosis.
04:46
Now CO2 is 28.
04:48
Now that's less than normal, right? because
normal CO2 is 35 to 45, so you label that alkalosis.
04:56
The bicarb was normal -
24 , in between 22 and 26.
05:01
Now that's steps 1, 2 and 3 at the top
Step 4, you look at the pH and
see if the CO2 or the bicarb matches.
05:11
Well since the CO2 matches, then we know that the
lungs are at fault so we have less CO2 than normal.
05:19
So at what rate you think those lungs
are breathing, very fast or very slow?
Right, very fast because
it's blowing off the CO2.
05:28
This patient is in respiratory alkalosis.
05:33
Good job.
05:34
Now think about the reasons of
patient could be in respiratory alkalosis.
05:38
We know they're breathing very fast,
one of the most common reasons is pain.
05:42
They also might be anxiety,
they might be afraid of something,
so your job as a nurse is to figure out what's
going on and to help the patient resolve that.
05:51
Because we saw that the pH is alkalosis,
the CO2 is alkalosis so we know where we are -
we're in alkalosis.
06:00
We know whose fault it is because the CO2 level
that matched, so we're in respiratory alkalosis.
06:08
Great, okay you're really catching on the how to do
this, soon you'll be ready to do it all on your own.
06:14
So we're going to try another example.
06:16
You do steps 1 through 4 on your own, pause the
video, we'll come back and talk about the answers.
06:26
Okay, let's see how you did,
compare your answers to our answers.
06:31
pH of 7.25 is less than
7.35 so it's labelled acidotic.
06:37
The CO2 is 37 - well that's normal
because the normal CO2 levels are 35 to 45
Bicarb, woah there's our problem.
06:47
Noarmal is 22 to26, so it's less than
22, it's at 18 so we label that acidotic.
06:55
Step 4 - look at the pH label, it's acidotic then
look at the CO2 or the bicarb, which one matches?
Of course, the bicarb.
So what does that mean?
We're in acidosis, that's where we
are because the pH is less than 7.35
and whose fault it is is the metabolic system,
the kidneys - our bicarb levels are too low
That's why we're in metabolic acidosis.