00:00
So what's the purpose
of a urine culture?
As the C part in a
Culture and Sensitivity.
00:06
We want to find
and identify the germs,
usually it's a bacteria or a fungus
that can cause the infection.
00:13
The first step in treating a UTI
is identifying what bug it is.
00:18
We can't pick the medicine
to treat the infection
unless we know the name of the bug
that's causing it.
00:25
Now, you may be wondering,
is there an additional test
necessary to treat a UTI?
We're not talking about
identifying a UTI,
but treating it
making the decision to do that.
00:36
Now this is the least favorite
answer of nursing students anywhere?
Because the answer is...
00:41
it depends.
00:43
So the culture is either going to be
negative or positive.
00:47
Let's look at when you need to do
a follow up test.
00:51
So if the culture is negative,
no bacteria or fungi
were identified.
00:55
So the patient may require follow-up
if they have continued symptoms.
01:01
Now the culture is positive,
that means we've identified
the bacteria or the fungi,
and we are going to do
a follow-up test
because we want to identify
how to treat it.
01:11
That's the sensitivity report.
01:13
Okay, so if I've done a culture,
do I need to do further testing?
Well, if the culture is negative,
I'm just going to follow them
and see if they continue
to have symptoms,
we might need to retest.
01:25
If it's positive, that means the
bacteria or fungi was identified.
01:29
And we are going
to do a follow-up test
to identify what is going
to treat it.
01:35
Now, here's a little caveat.
01:36
You can add this to your note
because it's very rare.
01:40
So I didn't want to write it out
on the slide for you.
01:43
But there is very rare cases
that a person with symptoms
similar to a UTI,
but with repeated negative cultures.
01:50
That means they didn't show
any bacterial infection,
They may in fact have
bladder cancer.
01:56
So that's something
to just keep on your radar.
01:59
It's very rare,
but it can happen.
02:02
So let's talk about
Sensitivity Testing.
02:05
the order will read urine C and S.
02:07
And you've already seen that
throughout the video series.
02:10
C is for Culture,
that means I'm going to identify
the bacteria or fungus.
02:14
Sensitivity identifies a medication
that will kill the bug.
02:19
So put these two together,
and we have a powerful plan
for treatment.
02:22
Both are needed
for effective treatment.
02:26
Now, would a sensitivity test be
done if the culture was negative?
Would it?
No.
02:34
Negative means
no bacteria or fungi was identified.
02:37
So there's no way we could tell
what it's sensitive to
because there was no bug present.
02:42
A sensitivity test is specific
to organisms.
02:46
Bacterial cultures take time.
02:49
Here's why this matters
when you are a nurse.
02:51
Because it usually takes
24 to 48 hours to grow the pathogen.
02:56
and then to get a pure culture
for further testing.
02:59
Your patient is going to
need medication
in that period of time.
03:03
So what does the healthcare team do
while they're waiting
for the results to come back?
Well, they'll use empiric therapy.
03:10
That's an educated guess,
of what's the most likely cause
of the infection,
and the patient will receive
those antibiotics,
usually a broad
spectrum antibiotic
until the specific results
come back.
03:22
That's another place
where you play a key role.
03:25
When those results come back,
please make sure
the healthcare provider
knows those results.
03:30
So adjustments can be made
in the medication plan.