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[Snow Owl SNOMED CT Browser] In this video we will use the editor to take a
closer look at SNOMED CT concepts.
The editor serves two basic functions:
it displays detailed information on a concept
which we will focus on in this video
and it also works as an editor so it allows you to make changes to a concept
for example adding another clinical
phrase
to describe the concept
or retiring the concept.
Let's review the basic navigation in the editor.
I already talked about this in previous videos so I will do
this fairly quickly.
Just a short review:
You can open a concept
by using the quick search
So you just go to the concept and you click it
and then the editor opens up
you can also open a concept in the
SNOMED CT view
Let's use the
filter search
so you go to the concept and you double click it
or you double click a concept in one of the other views for instance in the
search view
and to close the concept, simply hit this button or you can also
use the context menu by right clicking
and
closing the concept or closing everything but the active concept or close
all of them.
Let's take a close look at the information
that is displayed
in the concept editor.
There are several
pages
that can be selected by clicking the tabs on the bottom.
So
for instance if I go to
mappings
you can see that there's a mapping
to ICD-10
and you can see that they see the ICD-10 term that is
mapped
to the SNOMED CT
concept that we have opened.
Here, this is it.
You can move them by simply doing doing that.
But in this video we will just talk about the overview page.
The overview page--just let me make this a little bit bigger--
is comprised of three different sections: the description section
the properties section and the
SNOMED CT
properties section.
You can open and close these sections by
hitting the little
triangle
So those are the three sections.
Let's look at the
description section: it displays the clinical phrases that
describe
the concept.
In the left column you can see the description type --here--
So we have to standard descriptions which are fully specified name and
synonyms.
And
on the right side you can see the actual
description
terms. So: Lipodystrophy and then we have a synonym dystrophy of fatty tissue.
Snow Owl supports a variety of description types so there can also be
other
description types in this section.
For example, patient friendly descriptions like those used by Kaiser
Permanente.
A synonym has been marked as the preferred term.
This is indicated by this rosette icon. So wherever the rosette icon is
this is
the term that is the preferred term.
The little flag
indicates the
language dialect; so here it's
Great Britain English.
It also could be American, Australian, or another
English dialect and then you'd have a different flag here.
If you hover over
a concept
a tooltip will appear and there's additional information additional
details that will be
displayed.
Let me show you this.
So you can see the description ID here which is the number.
You can also see the effective
time.
So this description became effective
in
2002 there's the date:
31st of January, 2002.
It shows the language off the description
and that that the initial character is
case-insensitive.
This means that it doesn't matter if the first
character is upper or lower case
and it shows
which module it comes from. So here it's the SNOMED CT core
module. If it belonged to a national extension
you would see that module there.
Then there are these little blue triangles if you click on them
it displays a list of actions that can be performed on the description
so this is something you will need
for editing.
As you can see some of the actions are disabled, like
clone and retire
is disabled here so you cannot
perform these actions.
That is because the actions are enabled according to
the concept model--so if the concept model does not allow
these actions
then they can't be performed.
But we will talk about this
a little bit later.
Let's go to the
next
section which is the properties.
On the left side you have again the
relationship
types, the property types and on the right side you have the actual
values so that the terms
or the numeric values that are associated with it.
It shows you the concept's relationships and datatype properties.
The ungrouped relationships are in this first section. And here there are
property groups.
In the ungrouped properties you see
for example, an IS A relationship
so you can see that lipodystrophy
IS A lipoatrophy and lipodystrophy. This is
the parent concept of lipodystrophy
and if you look at it here in the hierarchy you can actually see that this
is the parent you can also see it here
in the parent
view.
The property group section
these are properties that belong together for example an associated
morphology
always has a finding site.
In our example the associated morphology
dystrophy
has a finding site
in the subcutaneous fatty tissue.
This is why they are in a single property group.
If a concept has several
property groups, they are displayed here as well. I will show you what
this looks like. Let's go to
tetralogy of Fallot.
We'll close the descriptions section and look at the properties.
As you can see there are actually
five different
property groups because you have different
associated morphologies and
different finding
sites.
There are actually several IS A relationships as well.
Because...and let me link this...
Because it has several parents so if you look here in the parents view you
can see
the different
parents of
this concept.
You're probably wondering why there are so many
empty fields here.
This is because of the Snow Owl concept model.
The concept model is based on the
IHTSDO Editorial Guide.
The concept model checks what properties are specified for a particular
type of concept
and automatically creates appropriate entry fields in the user interface so
this is
what you can see here.
You won't need this if you're just
viewing concepts
but if you're editing concepts this will make your life
a lot
easier...and I'll work with this in the next video.
Just like in the description section there's also the tooltip features
so if you hover
over
a property
it displays the different information.
So it's the relationship ID; it's again the effective
time
and SNOMED CT core module.
And then there are some
more advanced features
that
some more advanced information
that is dependent on the
type of
property, like the characteristic type, refinability and the modifier.
I don't want to go
into these details.
Let's go to the
last section of the editor: the SNOMED CT
properties.
It displays the metadata about the concept, so the fields in this
section are always the same.
You can see the concept ID here; you can also see the little
heart and if you remember the video about the top level concepts then you will
know that this is a
a clinical finding. Here
the heart is for
clinical
finding you can see
the module,
the effective time,
then you can see the status if it's an active or
inactive concept.
Inactive concepts --I have one here--
It looks like this so the icon is actually different here there's
a little red
minus.
Inactive concepts
when it's available will have alternate concepts displayed as
hyperlinks. Here this
is possibly equivalent to
so you have
two different hyperlinks and if I click them
it will
open the editor of this
alternate
concept.
You can also see
why it was set inactive so the inactivity status
which was
because
it was
ambiguous.
Then there are two more pieces of information
...let's go back to this one...
which is the definition status so it's either
defined
or it's primitive. If it's
defined you will see that the light bulb is yellow--it's on--if it's primitive
the light bulb will be off.
There's also this subclass definitions which is a more advanced
feature related to description
logic. We'll cover this
and the definition status in a video about Snow Owl's descriptions logic
features. I just wanted to introduce the basics to you in this video.
So much about looking at concepts in the editor
and in the next video we will actually
make changes
to a SNOMED CT concept.